CN106700080B - Modified silicone oil containing carboxylic betaine zwitter ion precursor, preparation method thereof and organic silicon material - Google Patents
Modified silicone oil containing carboxylic betaine zwitter ion precursor, preparation method thereof and organic silicon material Download PDFInfo
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Abstract
本发明公开了一种含有羧酸甜菜碱类两性离子前体的改性硅油及其制备方法和有机硅材料。其中,改性硅油的结构式如式Ⅰ所示(0<n≤800):本发明改性硅油经交联成膜反应制备得到的有机硅材料具有良好抗蛋白质非特异性吸附特性和耐水性。
The invention discloses a modified silicone oil containing carboxybetaine zwitterion precursors, a preparation method thereof and an organic silicon material. Among them, the structural formula of the modified silicone oil is shown in formula I (0<n≤800): The organosilicon material prepared by the modified silicone oil of the present invention through cross-linking and film-forming reaction has good anti-protein non-specific adsorption properties and water resistance.
Description
技术领域technical field
本发明涉及一种含有羧酸甜菜碱类两性离子前体的改性硅油及其制备方法,以及相应的有机硅材料。The invention relates to a modified silicone oil containing a carboxybetaine zwitterion precursor, a preparation method thereof, and a corresponding organosilicon material.
背景技术Background technique
蛋白质在材料表面的非特异性吸附一直是诸多领域所面临的重要问题,在医用植入体、药物载体、船舶涂料、生物传感器等各个方面都不容忽视。为了解决这一系列问题,抗蛋白质非特异性吸附(nonfouling)材料应运而生。研究发现,抗蛋白质非特异性吸附材料不仅能够有效防止发生血液接触体系中的凝血过程的产生,而且可以应用到防止广泛的固液界面的生物大分子吸附过程导致的人体排异和清除反应、细菌吸附、以及各种生物结垢现象的产生,其中包括生物膜的形成、藻类的生长,以致于表面吸附的贝类的生长。仅防止细菌吸附和生物膜的形成就可以为防止生物植入体引起的感染取得宝贵的时间。The non-specific adsorption of proteins on the surface of materials has always been an important problem in many fields, and it cannot be ignored in various aspects such as medical implants, drug carriers, ship coatings, and biosensors. In order to solve this series of problems, anti-protein nonspecific adsorption (nonfouling) materials came into being. Studies have found that anti-protein non-specific adsorption materials can not only effectively prevent the coagulation process in the blood contact system, but also can be applied to prevent human body rejection and clearance reactions caused by the adsorption process of biomacromolecules at a wide range of solid-liquid interfaces, bacteria Adsorption, and the generation of various biofouling phenomena, including the formation of biofilm, the growth of algae, and even the growth of shellfish adsorbed on the surface. Preventing bacterial adsorption and biofilm formation alone can buy valuable time in preventing infection from bioimplants.
近年来,科学家及学者们对nonfouling材料的研究十分重视和普遍,然而,能在实际应用中发挥良好作用的材料却相对有限,之前被广泛应用的聚乙二醇(PEG)材料在使用中也出现了越来越多的局限性,故对两性离子材料的研究受到了越来越多的重视。两性离子聚合材料目前被认为是应用前景最为光明的nonfouling材料,它包括在每个单元上同时携带一个正电荷和一个负电荷的聚甜菜碱类材料和在两个不同单元上携带等量正负电荷的聚两性电解质材料两大类。与亲水性聚合材料PEG不同的是,两性离子聚合材料并非依靠氢键与水分子结合,而是通过离子的溶剂化作用紧密结合水分子,在材料表面形成一个致密的水合层,从而赋予材料抗蛋白质非特异性吸附的性能。两性离子聚合材料合成路径简单方便,原材料丰富易得,应用广泛,成本较低,随着其研究的深入,近年来已经得到越来越多的关注和认可。In recent years, scientists and scholars have attached great importance to and popularized the research on nonfouling materials. However, the materials that can play a good role in practical applications are relatively limited. The polyethylene glycol (PEG) materials that were widely used before are also used in use. More and more limitations have emerged, so the research on zwitterionic materials has received more and more attention. Zwitterionic polymer materials are currently considered to be the most promising nonfouling materials, which include polybetaine materials that carry a positive charge and a negative charge on each unit and carry equal amounts of positive and negative charges on two different units. Charged polyampholyte materials fall into two categories. Different from the hydrophilic polymer material PEG, the zwitterionic polymer material does not rely on hydrogen bonds to combine with water molecules, but tightly binds water molecules through the solvation of ions, forming a dense hydration layer on the surface of the material, thus giving the material Anti-protein non-specific adsorption properties. The synthesis route of zwitterionic polymer materials is simple and convenient, the raw materials are abundant and easy to obtain, the application is wide, and the cost is low. With the deepening of its research, it has received more and more attention and recognition in recent years.
船舶抗污涂料是nonfouling材料应用的一个重要方面,传统的抗污涂料,如有机锡类、含铜化合物类,对环境的毒害作用十分明显,故逐渐被人们弃用,nonfouling材料的兴起能有效解决传统涂料对环境的污染问题,是一种环境友好型的船舶抗污涂料,然而其憎水性和耐水性不佳一直是限制其广泛应用的主要原因。Ship antifouling coatings are an important aspect of the application of nonfouling materials. Traditional antifouling coatings, such as organotin and copper-containing compounds, are very toxic to the environment, so they are gradually abandoned by people. The rise of nonfouling materials can be effective It is an environmentally friendly anti-fouling coating for ships to solve the problem of environmental pollution caused by traditional coatings. However, its poor hydrophobicity and water resistance have always been the main reasons that limit its wide application.
发明内容Contents of the invention
本发明所要解决的技术问题是提供一种含有羧酸甜菜碱类两性离子前体的改性硅油及其制备方法和有机硅材料。The technical problem to be solved by the present invention is to provide a modified silicone oil containing carboxybetaine zwitterion precursor, its preparation method and organic silicon material.
本发明解决其技术问题所采取的技术方案是:本发明含有羧酸甜菜碱类两性离子前体的改性硅油具有如以下式Ⅰ所示的结构:The technical scheme adopted by the present invention to solve its technical problems is: the modified silicone oil containing carboxybetaine zwitterion precursors of the present invention has a structure as shown in the following formula I:
式Ⅰ中,0<n≤800。In Formula I, 0<n≤800.
本发明改性硅油的制备方法包括:The preparation method of modified silicone oil of the present invention comprises:
步骤a:将具有如式Ⅱ所示结构的第一化合物、如式Ⅲ所示结构的第二化合物、含铂催化剂、酚类阻聚剂和第一溶剂混合后进行硅氢加成反应,得到如式Ⅳ所示结构的第三化合物,式Ⅲ和式Ⅳ中,0<n≤800;Step a: mixing the first compound having the structure shown in formula II, the second compound having the structure shown in formula III, the platinum-containing catalyst, the phenolic polymerization inhibitor and the first solvent, and performing hydrosilylation reaction to obtain The third compound with the structure shown in formula IV, in formula III and formula IV, 0<n≤800;
步骤b:将第三化合物、含锡催化剂、肌氨酸酯和第二溶剂混合后进行环氧基团开环反应,得到所述改性硅油;Step b: Mixing the third compound, the tin-containing catalyst, sarcosinate and the second solvent, and performing an epoxy group ring-opening reaction to obtain the modified silicone oil;
进一步地,在本发明所述步骤a中,所述第一化合物与第二化合物中的Si-H键的摩尔比为1:0.6~0.7,第一化合物、含铂催化剂、酚类阻聚剂和第一溶剂的质量比为1:0.001~0.005:0.001~0.005:2~15,所述硅氢加成反应的反应温度为80~110℃、反应时间为4~8小时。Further, in step a of the present invention, the molar ratio of the Si-H bond in the first compound to the second compound is 1:0.6-0.7, the first compound, the platinum-containing catalyst, and the phenolic polymerization inhibitor The mass ratio to the first solvent is 1:0.001-0.005:0.001-0.005:2-15, the reaction temperature of the hydrosilylation reaction is 80-110° C., and the reaction time is 4-8 hours.
进一步地,在本发明所述步骤b中,所述肌氨酸酯与第三化合物中的环氧基团的摩尔比为1:1,所述环氧基团开环反应的反应温度为70~80℃、反应时间为8~12h。Further, in step b of the present invention, the molar ratio of the sarcosinate to the epoxy group in the third compound is 1:1, and the reaction temperature of the ring-opening reaction of the epoxy group is 70 ~80°C, the reaction time is 8~12h.
进一步地,本发明所述肌氨酸酯为肌氨酸叔丁酯。Further, the sarcosinate described in the present invention is tert-butyl sarcosinate.
进一步地,本发明所述第一化合物为烯丙基缩水甘油醚,第二化合物为含氢硅油。Further, the first compound of the present invention is allyl glycidyl ether, and the second compound is hydrogen-containing silicone oil.
进一步地,本发明所述含锡催化剂为异辛酸亚锡(Sn(Oct)2),含铂催化剂为Karetedt铂催化剂,酚类阻聚剂为2,6-二叔丁基-4-甲基苯酚。Further, the tin-containing catalyst described in the present invention is stannous octanoate (Sn(Oct) 2 ), the platinum-containing catalyst is a Karetedt platinum catalyst, and the phenolic polymerization inhibitor is 2,6-di-tert-butyl-4-methyl phenol.
利用本发明的改性硅油制备有机硅材料的方法为:将所述改性硅油经交联反应得到有机硅材料。The method for preparing the organosilicon material by utilizing the modified silicone oil of the present invention is as follows: the organosilicon material is obtained through cross-linking reaction of the modified silicone oil.
进一步地,在本发明所述改性硅油中加入易挥发的不含活泼氢的有机溶剂和交联剂,经交联反应后固化得到所述有机硅材料。Furthermore, a volatile organic solvent without active hydrogen and a crosslinking agent are added to the modified silicone oil of the present invention, and the silicone material is obtained by curing after a crosslinking reaction.
进一步地,本发明所述交联剂为含多异氰酸基团的分子。Further, the crosslinking agent in the present invention is a molecule containing polyisocyanate groups.
与现有技术相比,本发明的有益效果是:Compared with prior art, the beneficial effect of the present invention is:
本发明在研究和开发抗蛋白质非特异性吸附材料的基础上,改进传统两性离子类聚合物材料在耐水性方面的缺陷,公开了一种含有羧酸甜菜碱类两性离子前体的改性硅油及其制备方法和应用,该改性硅油经交联固化成膜后制得的有机硅材料,具有良好抗蛋白质非特异性吸附特性和耐水性。具体如下:Based on the research and development of anti-protein non-specific adsorption materials, the present invention improves the defects of traditional zwitterionic polymer materials in terms of water resistance, and discloses a modified silicone oil containing carboxybetaine zwitterionic precursors and Its preparation method and application, the organosilicon material obtained after the modified silicone oil is cross-linked and cured to form a film, has good anti-protein non-specific adsorption properties and water resistance. details as follows:
(1)传统的两性离子类聚合物材料改良了PEG的长效性,具有良好的抗蛋白质非特异性吸附性能,但往往耐水性较差,在应用于水相环境时,水分子极易进入材料内部,导致其溶胀变形,机械强度降低,物化性质改变,如在船舶抗污涂料领域,易导致涂层溶胀后易划伤、甚至从船体表面脱落。而传统有机硅材料由于其硅氧烷的憎水性结构,耐水性极佳,且具有较好的生物安全性和化学惰性,但缺乏抗蛋白质、细胞及细菌等的吸附能力,因此应用于生物材料领域仍有明显不足。本发明改性硅油不仅为制备有机硅材料提供了有机硅主链结构和易交联基团,而且富含酸羧酸甜菜碱类两性离子前体酯,使有机硅材料降解时能通过有机硅主链结构的降解,且降解产物有更好的环境和生物相容性。而富含酸羧酸甜菜碱类两性离子前体酯能在水解后产生抗非特异性吸附性能。本发明有机硅材料是在有机硅憎水主链的基础上,侧链引入了两性离子前体结构,交联成膜后同时兼顾了良好的抗蛋白质非特异性吸附性能和耐水性。其抗蛋白质非特异性吸附性能与聚甲基丙烯酸羧酸甜菜碱类两性离子前体酯和聚丙烯酸羧酸甜菜碱类两性离子前体酯等相比在同一水平,而耐水性明显提高。(1) The traditional zwitterionic polymer material improves the long-term performance of PEG and has good anti-protein non-specific adsorption performance, but often has poor water resistance. When applied in an aqueous environment, water molecules can easily enter the material Internally, it will swell and deform, reduce mechanical strength, and change physical and chemical properties. For example, in the field of ship antifouling coatings, it is easy to cause the coating to swell and scratch easily, or even fall off from the surface of the hull. Due to its hydrophobic structure of siloxane, traditional organosilicon materials have excellent water resistance, good biological safety and chemical inertness, but lack the ability to resist the adsorption of proteins, cells and bacteria, so they are used in biological materials. There are still obvious deficiencies in the field. The modified silicone oil of the present invention not only provides the organosilicon main chain structure and easy cross-linking groups for the preparation of organosilicon materials, but also is rich in acid carboxybetaine zwitterion precursor esters, so that the organosilicon materials can be degraded through organosilicon The main chain structure is degraded, and the degradation products have better environmental and biocompatibility. However, the acid-rich carboxybetaine zwitterionic precursor esters can produce anti-nonspecific adsorption properties after hydrolysis. The organosilicon material of the present invention is based on the organosilicon hydrophobic main chain, and the side chain introduces a zwitterion precursor structure, and after cross-linking and forming a film, both good anti-protein non-specific adsorption performance and water resistance are taken into account. Its anti-protein non-specific adsorption performance is at the same level as that of polymethacrylic acid carboxybetaine zwitterion precursor ester and polyacrylic acid carboxybetaine zwitterion precursor ester, etc., while its water resistance is significantly improved.
(2)本发明有机硅材料仍然保持了有机硅材料的主链结构,使其能够保留有机硅材料的透氧性能力和降解能力。与聚甲基丙烯酸羧酸甜菜碱类两性离子前体酯和聚丙烯酸羧酸甜菜碱类两性离子前体酯等相比,具有更好的透氧性能力和降解能力。(2) The organosilicon material of the present invention still maintains the main chain structure of the organosilicon material, so that it can retain the oxygen permeability and degradation ability of the organosilicon material. Compared with polymethacrylic acid carboxybetaine zwitterion precursor ester and polyacrylic acid carboxybetaine zwitterion precursor ester, it has better oxygen permeability and degradation ability.
由此,本发明含有羧酸甜菜碱类两性离子前体的改性硅油在船舶抗污涂料、生物材料等的研究中具有广阔应用前景。Therefore, the modified silicone oil containing carboxybetaine zwitterion precursors of the present invention has broad application prospects in the research of ship antifouling coatings, biological materials, and the like.
附图说明Description of drawings
图1是实施例1所合成的第三化合物(环氧改性有机硅油)的核磁谱图;Fig. 1 is the nuclear magnetic spectrum of the third compound (epoxy-modified silicone oil) synthesized in embodiment 1;
图2是实施例1所合成的有机硅油的核磁谱图;Fig. 2 is the nuclear magnetic spectrogram of the organic silicone oil synthesized by embodiment 1;
图3是实施例5中所合成的有机硅材料的抗非特异性蛋白质吸附性能测试结果图。Fig. 3 is a graph showing the test results of the anti-nonspecific protein adsorption performance of the organosilicon material synthesized in Example 5.
具体实施方式Detailed ways
本发明有机硅材料的合成路线如下所示:The synthetic route of organosilicon material of the present invention is as follows:
以下以具体的实施例详细说明本发明中一种含有羧酸甜菜碱类两性离子前体的改性硅油及其制备方法和应用。A modified silicone oil containing carboxybetaine zwitterion precursors and its preparation method and application in the present invention will be described in detail below with specific examples.
实施例1:Example 1:
(1)含氢硅油的硅氢加成反应:向三口烧瓶中加入13.38g(0.116mol,记为1.5eq)第一化合物(烯丙基缩水甘油醚)、55mg Karstedt催化剂、66.9mg阻聚剂2,6-二叔丁基-4-甲基苯酚(BHT)和100g无水甲苯,充分搅拌均匀。在N2保护的密闭条件下,预热升温至60℃,30min后,升温至80℃,搅拌,缓慢滴加含5.00g第二化合物(含氢硅油)(含Si-H键0.077mol,1.0eq,结构式如式Ⅲ所示)的50g无水甲苯溶液。搅拌反应5h,得淡黄色溶液。将上述淡黄色溶液进行旋蒸,将所得粘稠溶液在甲醇-水混合液中沉淀两次(第一次体积比为V甲醇:V水=1:1,第二次为V甲醇:V水=1:2),第三次用蒸馏水沉淀,弃去上清液。在适量乙酸乙酯中溶解,加入无水硫酸钠干燥。抽滤除去不溶物,滤液30℃旋蒸除去溶剂,得到的油状液体即第三化合物。第三化合物为环氧改性有机硅油。第三化合物在氘代氯仿中的1H-NMR谱图如图1所示。产物中的各个H原子所对应的峰已在图1中标出,未标出的为杂质峰。其中,化学位移为4.67ppm处峰是因硅氢加成反应不完全而留下的Si-H键上的氢原子。将此图1与标准物质图谱进行比对,根据峰面积计算硅氢加成反应的转化率。由图1可知,杂质峰较少,杂质主要为溶剂乙酸乙酯,反应转化率约为90%。(1) Hydrosilylation reaction of hydrogen-containing silicone oil: Add 13.38g (0.116mol, denoted as 1.5eq) of the first compound (allyl glycidyl ether), 55mg of Karstedt catalyst, and 66.9mg of polymerization inhibitor into a three-necked flask 2,6-di-tert-butyl-4-methylphenol (BHT) and 100g of anhydrous toluene, fully stirred evenly. Under the airtight condition of N2 protection, preheat the temperature to 60°C, after 30min, raise the temperature to 80°C, stir, and slowly add 5.00g of the second compound (hydrogen-containing silicone oil) (containing Si-H bond 0.077mol, 1.0 eq, the 50g anhydrous toluene solution of structural formula as shown in formula III). The reaction was stirred for 5h to obtain a light yellow solution. The above-mentioned pale yellow solution was subjected to rotary evaporation, and the resulting viscous solution was precipitated twice in a methanol-water mixture (the volume ratio for the first time was V methanol : V water = 1:1, and the second time was V methanol : V water =1:2), precipitated with distilled water for the third time, and discarded the supernatant. Dissolve it in an appropriate amount of ethyl acetate, add anhydrous sodium sulfate and dry it. The insoluble matter was removed by suction filtration, and the filtrate was rotary evaporated at 30°C to remove the solvent, and the obtained oily liquid was the third compound. The third compound is epoxy-modified silicone oil. The 1 H-NMR spectrum of the third compound in deuterated chloroform is shown in FIG. 1 . The peaks corresponding to each H atom in the product have been marked in Figure 1, and the unmarked peaks are impurity peaks. Among them, the peak at the chemical shift of 4.67ppm is the hydrogen atom on the Si-H bond left due to the incomplete hydrosilylation reaction. Compare this Figure 1 with the standard substance spectrum, and calculate the conversion rate of the hydrosilylation reaction according to the peak area. As can be seen from Figure 1, there are fewer impurity peaks, the impurity is mainly solvent ethyl acetate, and the reaction conversion rate is about 90%.
(2)环氧基团开环反应:将2.56g(0.0167mol,记为1.5eq)肌氨酸叔丁酯盐酸盐充分溶解于50mL DMF中,加入3.37g(0.0333mol,3.0eq)三乙胺,析出白色晶体,抽滤除去不溶物。将滤液置于100mL圆底烧瓶中,加入2.00g(0.0111mol,1.0eq)第三化合物及催化剂Sn(Oct)2,75℃下搅拌反应8h得黄色溶液。将其用旋转蒸发器旋蒸(65℃)除去三乙胺及大部分DMF,所得黏稠液体即为有机硅油的粗产物。将粗产物溶于少量二氯甲烷中,用乙醚沉淀2~3次,弃去上清液,下层沉淀溶于乙酸乙酯后,加入无水硫酸钠干燥。抽滤除去不溶物,滤液30℃旋蒸除溶剂,得到的黏稠液体即改性硅油,该改性硅油在氘代氯仿中的1H-NMR谱图如图2所示。产物中的主要氢原子所对应的峰已在图2中标出,杂质峰和部分甲基峰未标出。杂质峰主要为溶剂乙酸乙酯、二氯甲烷。实施例2:(2) Ring-opening reaction of epoxy group: fully dissolve 2.56g (0.0167mol, recorded as 1.5eq) tert-butyl sarcosine hydrochloride in 50mL DMF, add 3.37g (0.0333mol, 3.0eq) Ethylamine, white crystals were precipitated, and the insoluble matter was removed by suction filtration. The filtrate was placed in a 100 mL round bottom flask, 2.00 g (0.0111 mol, 1.0 eq) of the third compound and catalyst Sn(Oct) 2 were added, and the reaction was stirred at 75° C. for 8 h to obtain a yellow solution. Use a rotary evaporator (65°C) to remove triethylamine and most of the DMF, and the viscous liquid obtained is the crude product of silicone oil. Dissolve the crude product in a small amount of dichloromethane, precipitate with ether 2-3 times, discard the supernatant, dissolve the lower precipitate in ethyl acetate, and add anhydrous sodium sulfate to dry. The insoluble matter was removed by suction filtration, and the filtrate was rotary evaporated at 30°C to remove the solvent, and the obtained viscous liquid was modified silicone oil. The 1 H-NMR spectrum of the modified silicone oil in deuterated chloroform is shown in Figure 2. The peaks corresponding to the main hydrogen atoms in the product have been marked in Figure 2, and the impurity peaks and some methyl peaks have not been marked. The impurity peaks are mainly solvent ethyl acetate and dichloromethane. Example 2:
(1)含氢硅油的硅氢加成反应:向三口烧瓶中加入13.38g(0.116mol,记为1.5eq)第一化合物(烯丙基缩水甘油醚)、13mg Karstedt催化剂、13mg阻聚剂2,6-二叔丁基-4-甲基苯酚(BHT)和17.84g无水甲苯,充分搅拌均匀。在N2保护的密闭条件下,预热升温至65℃,30min后,升温至110℃,搅拌,缓慢滴加含4.50g第二化合物(含氢硅油)(含Si-H键0.069mol,0.9eq,结构式Ⅲ所示)的8.92g无水甲苯溶液。搅拌反应4h,得淡黄色溶液。将上述淡黄色溶液进行旋蒸,将所得粘稠溶液在甲醇-水混合液中沉淀两次(第一次体积比为V甲醇:V水=1:1,第二次为V甲醇:V水=1:2),第三次用蒸馏水沉淀,弃去上清液。在适量乙酸乙酯中溶解,加入无水硫酸钠干燥。抽滤除去不溶物,滤液30℃旋蒸除去溶剂,得到的油状液体即第三化合物。(1) Hydrosilylation reaction of hydrogen-containing silicone oil: add 13.38g (0.116mol, denoted as 1.5eq) of the first compound (allyl glycidyl ether), 13mg Karstedt catalyst, 13mg inhibitor 2 into a three-necked flask , 6-di-tert-butyl-4-methylphenol (BHT) and 17.84g of anhydrous toluene, fully stirred evenly. Under the airtight condition of N2 protection, preheat the temperature to 65°C, after 30min, raise the temperature to 110°C, stir, slowly add 4.50g of the second compound (hydrogen-containing silicone oil) (containing Si-H bond 0.069mol, 0.9 eq, 8.92 g of anhydrous toluene solution shown in structural formula III). The reaction was stirred for 4h to obtain a light yellow solution. The above-mentioned pale yellow solution was subjected to rotary evaporation, and the resulting viscous solution was precipitated twice in a methanol-water mixture (the volume ratio for the first time was V methanol : V water = 1:1, and the second time was V methanol : V water =1:2), precipitated with distilled water for the third time, and discarded the supernatant. Dissolve it in an appropriate amount of ethyl acetate, add anhydrous sodium sulfate and dry it. The insoluble matter was removed by suction filtration, and the filtrate was rotary evaporated at 30°C to remove the solvent, and the obtained oily liquid was the third compound.
(2)环氧基团开环反应:将2.56g(0.0167mol,记为1.5eq)肌氨酸叔丁酯盐酸盐充分溶解于50mL DMF中,加入3.37g(0.0333mol,3.0eq)三乙胺,析出白色晶体,抽滤除去不溶物。将滤液置于100mL圆底烧瓶中,加入3.00g(0.0167mol,1.5eq)第三化合物及催化剂Sn(Oct)2,70℃下搅拌反应12h得黄色溶液。将其用旋转蒸发器旋蒸(65℃)除去三乙胺及大部分DMF,所得黏稠液体即为有机硅油的粗产物。将粗产物溶于少量二氯甲烷中,用乙醚沉淀2~3次,弃去上清液,下层沉淀溶于乙酸乙酯后,加入无水硫酸钠干燥。抽滤除去不溶物,滤液30℃旋蒸除溶剂,得到的黏稠液体即改性硅油。(2) Ring-opening reaction of epoxy group: fully dissolve 2.56g (0.0167mol, recorded as 1.5eq) tert-butyl sarcosine hydrochloride in 50mL DMF, add 3.37g (0.0333mol, 3.0eq) Ethylamine, white crystals were precipitated, and the insoluble matter was removed by suction filtration. The filtrate was placed in a 100 mL round bottom flask, 3.00 g (0.0167 mol, 1.5 eq) of the third compound and the catalyst Sn(Oct) 2 were added, and the reaction was stirred at 70° C. for 12 h to obtain a yellow solution. Use a rotary evaporator (65°C) to remove triethylamine and most of the DMF, and the viscous liquid obtained is the crude product of silicone oil. Dissolve the crude product in a small amount of dichloromethane, precipitate with ether 2-3 times, discard the supernatant, dissolve the lower precipitate in ethyl acetate, and add anhydrous sodium sulfate to dry. The insoluble matter was removed by suction filtration, and the filtrate was rotary evaporated at 30°C to remove the solvent, and the viscous liquid obtained was the modified silicone oil.
实施例3:Example 3:
(1)含氢硅油的硅氢加成反应:向三口烧瓶中加入13.38g(0.116mol,记为1.5eq)第一化合物(烯丙基缩水甘油醚)、67mg Karstedt催化剂、67mg阻聚剂2,6-二叔丁基-4-甲基苯酚(BHT)和134g无水甲苯,充分搅拌均匀。在N2保护的密闭条件下,预热升温至60℃,30min后,升温至80℃,搅拌,缓慢滴加含5.00g第二化合物(含氢硅油)(含Si-H键0.077mol,1.0eq,结构式Ⅲ所示)的72g无水甲苯溶液。搅拌反应8h,得淡黄色溶液。将上述淡黄色溶液进行旋蒸,将所得粘稠溶液在甲醇-水混合液中沉淀两次(第一次体积比为V甲醇:V水=1:1,第二次为V甲醇:V水=1:2),第三次用蒸馏水沉淀,弃去上清液。在适量乙酸乙酯中溶解,加入无水硫酸钠干燥。抽滤除去不溶物,滤液30℃旋蒸除去溶剂,得到的油状液体即第三化合物。(1) Hydrosilylation reaction of hydrogen-containing silicone oil: add 13.38g (0.116mol, denoted as 1.5eq) of the first compound (allyl glycidyl ether), 67mg Karstedt catalyst, 67mg inhibitor 2 into a three-necked flask , 6-di-tert-butyl-4-methylphenol (BHT) and 134g of anhydrous toluene, fully stirred evenly. Under the airtight condition of N2 protection, preheat the temperature to 60°C, after 30min, raise the temperature to 80°C, stir, and slowly add 5.00g of the second compound (hydrogen-containing silicone oil) (containing Si-H bond 0.077mol, 1.0 eq, shown in structural formula III) 72g anhydrous toluene solution. The reaction was stirred for 8h to obtain a light yellow solution. The above-mentioned pale yellow solution was subjected to rotary evaporation, and the resulting viscous solution was precipitated twice in a methanol-water mixture (the volume ratio for the first time was V methanol : V water = 1:1, and the second time was V methanol : V water =1:2), precipitated with distilled water for the third time, and discarded the supernatant. Dissolve it in an appropriate amount of ethyl acetate, add anhydrous sodium sulfate and dry it. The insoluble matter was removed by suction filtration, and the filtrate was rotary evaporated at 30°C to remove the solvent, and the obtained oily liquid was the third compound.
(2)环氧基团开环反应:将2.56g(0.0167mol,记为1.5eq)肌氨酸叔丁酯盐酸盐充分溶解于50mL DMF中,加入3.37g(0.0333mol,3.0eq)三乙胺,析出白色晶体,抽滤除去不溶物。将滤液置于100mL圆底烧瓶中,加入3.00g(0.0167mol,1.5eq)第三化合物及催化剂Sn(Oct)2,80℃下搅拌反应8h得黄色溶液。将其用旋转蒸发器旋蒸(65℃)除去三乙胺及大部分DMF,所得黏稠液体即为有机硅油的粗产物。将粗产物溶于少量二氯甲烷中,用乙醚沉淀2~3次,弃去上清液,下层沉淀溶于乙酸乙酯后,加入无水硫酸钠干燥。抽滤除去不溶物,滤液30℃旋蒸除溶剂,得到的黏稠液体即改性硅油。(2) Ring-opening reaction of epoxy group: fully dissolve 2.56g (0.0167mol, recorded as 1.5eq) tert-butyl sarcosine hydrochloride in 50mL DMF, add 3.37g (0.0333mol, 3.0eq) Ethylamine, white crystals were precipitated, and the insoluble matter was removed by suction filtration. The filtrate was placed in a 100 mL round bottom flask, 3.00 g (0.0167 mol, 1.5 eq) of the third compound and the catalyst Sn(Oct) 2 were added, and the reaction was stirred at 80° C. for 8 h to obtain a yellow solution. Use a rotary evaporator (65°C) to remove triethylamine and most of the DMF, and the viscous liquid obtained is the crude product of silicone oil. Dissolve the crude product in a small amount of dichloromethane, precipitate with ether 2-3 times, discard the supernatant, dissolve the lower precipitate in ethyl acetate, and add anhydrous sodium sulfate to dry. The insoluble matter was removed by suction filtration, and the filtrate was rotary evaporated at 30°C to remove the solvent, and the viscous liquid obtained was the modified silicone oil.
实施例4:Example 4:
(1)含氢硅油的硅氢加成反应:向三口烧瓶中加入13.38g(0.116mol,记为1.5eq)第一化合物(烯丙基缩水甘油醚)、40mg Karstedt催化剂、40mg阻聚剂2,6-二叔丁基-4-甲基苯酚(BHT)和100g无水甲苯,充分搅拌均匀。在N2保护的密闭条件下,预热升温至60℃,30min后,升温至80℃,搅拌,缓慢滴加含6.00g第二化合物(含氢硅油)(含Si-H键0.092mol,1.0eq,结构式Ⅲ所示)的50g无水甲苯溶液。搅拌反应6h,得淡黄色溶液。将上述淡黄色溶液进行旋蒸,将所得粘稠溶液在甲醇-水混合液中沉淀两次(第一次体积比为V甲醇:V水=1:1,第二次为V甲醇:V水=1:2),第三次用蒸馏水沉淀,弃去上清液。在适量乙酸乙酯中溶解,加入无水硫酸钠干燥。抽滤除去不溶物,滤液30℃旋蒸除去溶剂,得到的油状液体即第三化合物。(1) Hydrosilylation reaction of hydrogen-containing silicone oil: add 13.38g (0.116mol, denoted as 1.5eq) of the first compound (allyl glycidyl ether), 40mg Karstedt catalyst, 40mg inhibitor 2 into a three-necked flask , 6-di-tert-butyl-4-methylphenol (BHT) and 100g of anhydrous toluene, fully stirred evenly. Under the airtight condition of N2 protection, preheat the temperature to 60°C, after 30min, raise the temperature to 80°C, stir, and slowly add 6.00g of the second compound (hydrogen-containing silicone oil) (containing Si-H bond 0.092mol, 1.0 eq, shown in structural formula III) 50g anhydrous toluene solution. The reaction was stirred for 6h to obtain a light yellow solution. The above-mentioned pale yellow solution was subjected to rotary evaporation, and the resulting viscous solution was precipitated twice in a methanol-water mixture (the volume ratio for the first time was V methanol : V water = 1:1, and the second time was V methanol : V water =1:2), precipitated with distilled water for the third time, and discarded the supernatant. Dissolve it in an appropriate amount of ethyl acetate, add anhydrous sodium sulfate and dry it. The insoluble matter was removed by suction filtration, and the filtrate was rotary evaporated at 30°C to remove the solvent, and the obtained oily liquid was the third compound.
(2)环氧基团开环反应:将2.56g(0.0167mol,记为1.5eq)肌氨酸叔丁酯盐酸盐充分溶解于50mL DMF中,加入3.37g(0.0333mol,3.0eq)三乙胺,析出白色晶体,抽滤除去不溶物。将滤液置于100mL圆底烧瓶中,加入3.00g(0.0167mol,1.5eq)第三化合物及催化剂Sn(Oct)2,80℃下搅拌反应8h得黄色溶液。将其用旋转蒸发器旋蒸(65℃)除去三乙胺及大部分DMF,所得黏稠液体即为有机硅油的粗产物。将粗产物溶于少量二氯甲烷中,用乙醚沉淀2~3次,弃去上清液,下层沉淀溶于乙酸乙酯后,加入无水硫酸钠干燥。抽滤除去不溶物,滤液30℃旋蒸除溶剂,得到的黏稠液体即改性硅油。(2) Ring-opening reaction of epoxy group: fully dissolve 2.56g (0.0167mol, recorded as 1.5eq) tert-butyl sarcosine hydrochloride in 50mL DMF, add 3.37g (0.0333mol, 3.0eq) Ethylamine, white crystals were precipitated, and the insoluble matter was removed by suction filtration. The filtrate was placed in a 100 mL round bottom flask, 3.00 g (0.0167 mol, 1.5 eq) of the third compound and the catalyst Sn(Oct) 2 were added, and the reaction was stirred at 80° C. for 8 h to obtain a yellow solution. Use a rotary evaporator (65°C) to remove triethylamine and most of the DMF, and the viscous liquid obtained is the crude product of silicone oil. Dissolve the crude product in a small amount of dichloromethane, precipitate with ether 2-3 times, discard the supernatant, dissolve the lower precipitate in ethyl acetate, and add anhydrous sodium sulfate to dry. The insoluble matter was removed by suction filtration, and the filtrate was rotary evaporated at 30°C to remove the solvent, and the viscous liquid obtained was the modified silicone oil.
实施例5:Example 5:
(1)涂膜(即有机硅材料)的制备:在5mL离心管中加入1.00g实施例1中制备得到的有机硅油和2mL乙酸乙酯,于旋涡混匀器上震荡使其充分溶解。向离心管中加入70μg HDI,超声混匀。将混合液注入模具中,让乙酸乙酯挥发干燥,使其充分成膜,获得涂层(即有机硅材料)。(1) Preparation of coating film (ie, silicone material): Add 1.00 g of the silicone oil prepared in Example 1 and 2 mL of ethyl acetate into a 5 mL centrifuge tube, shake on a vortex mixer to fully dissolve it. Add 70 μg HDI to the centrifuge tube and mix by ultrasonic. The mixed solution is injected into the mold, and the ethyl acetate is volatilized and dried, so that it is fully formed into a film to obtain a coating (ie, a silicone material).
(2)有机硅材料抗蛋白质非特异性吸附性能评估:将有机硅材料均匀剪切成边长约为5mm的正方形切片,放入0.2mol/L NaOH溶液中水解不同时间。测量并记录各样品及组织培养聚苯乙烯(TCPS)片的边长。将水解后的样品和TCPS片置于24孔板中,每孔加入HRP-IgG浓度为1μg/mL的PBS缓冲溶液1mL,置于水平摇床振荡1h。将样品用PBS缓冲溶液清洗5次,每次1mL,并置于新孔中。配置浓度为1mg/mL邻苯二胺+1μL/mL 0.03%过氧化氢的磷酸氢二钠-柠檬酸缓冲溶液,每孔加入1mL,另取一孔加入相同溶液作为空白对照组,置于水平摇床上振荡15min进行显色反应。向各孔中加入2mol/L的H2SO4溶液1mL终止反应。取各溶液200μL加入96孔板,用酶标仪检测其在492nm处的吸光度(OD值)。有机硅材料的抗蛋白质非特异性吸附如图3所示。(2) Evaluation of the anti-protein non-specific adsorption performance of organosilicon materials: the organosilicon materials were evenly cut into square slices with a side length of about 5 mm, and hydrolyzed in 0.2 mol/L NaOH solution for different times. Measure and record the side lengths of each sample and tissue culture polystyrene (TCPS) sheet. The hydrolyzed samples and TCPS sheets were placed in a 24-well plate, 1 mL of PBS buffer solution with an HRP-IgG concentration of 1 μg/mL was added to each well, and placed on a horizontal shaker for 1 h. The samples were washed 5 times with PBS buffer solution, 1 mL each time, and placed in new wells. Prepare a disodium hydrogen phosphate-citric acid buffer solution with a concentration of 1 mg/mL o-phenylenediamine + 1 μL/mL 0.03% hydrogen peroxide, add 1 mL to each well, and add the same solution to another well as a blank control group, and place in a horizontal Shake on a shaker for 15 minutes for color reaction. Add 1 mL of 2 mol/L H 2 SO 4 solution to each well to terminate the reaction. 200 μL of each solution was added to a 96-well plate, and the absorbance (OD value) at 492 nm was detected with a microplate reader. The anti-protein non-specific adsorption of silicone materials is shown in Figure 3.
从图3中可以看出有机硅材料水解前的蛋白相对吸附量约为78.9%。在0.2mol/LNaOH溶液中水解1h后,即可达到较好的抗蛋白非特异性吸附效果,约降为22.0%。当水解3h,可达最佳抗蛋白吸附效果,约为18.2%。随着水解时间继续增加,在4.5h之内仍可保持较好的抗蛋白吸附能力,而当水解时间达到6h及以上时,蛋白相对吸附量开始有所上升,这可能是由于长时间的水解破坏了有机硅材料的两性离子结构所致。总的来说,有机硅材料水解后具有较为优秀的抗蛋白质非特异性吸附能力。It can be seen from Figure 3 that the relative protein adsorption capacity of the organosilicon material before hydrolysis is about 78.9%. After being hydrolyzed in 0.2mol/L NaOH solution for 1 hour, a good anti-protein non-specific adsorption effect can be achieved, which is reduced to about 22.0%. When hydrolyzed for 3 hours, the best anti-protein adsorption effect can be achieved, which is about 18.2%. As the hydrolysis time continues to increase, it can still maintain a good anti-protein adsorption capacity within 4.5h, and when the hydrolysis time reaches 6h and above, the relative adsorption amount of protein begins to increase, which may be due to the long-term hydrolysis It is caused by the destruction of the zwitterionic structure of the organosilicon material. In general, silicone materials have excellent anti-protein non-specific adsorption ability after hydrolysis.
(3)有机硅材料溶胀性能评估:将应用例1中所合成的有机硅材料切割成适当大小的样品(约5mm×5mm),在pH=7.4的PBS缓冲液中浸泡,通过定期拍照观察其大小、透明度及其他形态的变化,对其进行长期监测。根据样品在pH=7.4的PBS缓冲溶液中浸泡不同时间后的形态可以看出,样品在浸泡一个月、两个月、三个月和六个月之后与浸泡前(0month)相比,在大小、颜色、透明度、强度方面并无明显差异。由此说明在浸泡过程中,并无太多水分子进入样品内部,导致样品溶胀,合成的含两性离子前体的有机硅材料具有良好的抗溶胀性能。(3) Evaluation of the swelling performance of silicone materials: Cut the silicone materials synthesized in Application Example 1 into samples of appropriate size (about 5mm×5mm), soak them in PBS buffer solution with pH=7.4, and observe their swelling properties by taking regular photos. Changes in size, transparency, and other morphology should be monitored long-term. According to the morphology of the samples soaked in the PBS buffer solution of pH=7.4 for different time, it can be seen that the size of the samples after soaking for one month, two months, three months and six months compared with that before soaking (0month) , color, transparency, and strength were not significantly different. This shows that during the immersion process, not too many water molecules enter the interior of the sample, causing the sample to swell, and the synthesized organosilicon material containing zwitterionic precursors has good swelling resistance.
实施例6:Embodiment 6:
涂膜(即有机硅材料)的制备:在5mL离心管中加入1.00g实施例1中制备得到的有机硅油和2mL乙酸乙酯,于旋涡混匀器上震荡使其充分溶解。向离心管中加入120μg MDI,超声混匀。将混合液注入模具中,放入37℃干燥箱内干燥24h,使其充分成膜,所得到的有机硅材料的硬度有一定提高,并具有良好的抗蛋白质非特异性吸附能力和抗溶胀性能。Preparation of coating film (ie, silicone material): Add 1.00 g of the silicone oil prepared in Example 1 and 2 mL of ethyl acetate into a 5 mL centrifuge tube, shake on a vortex mixer to fully dissolve it. Add 120 μg MDI to the centrifuge tube, and mix well by ultrasonic. The mixed solution was poured into the mold, and dried in a 37°C drying oven for 24 hours to fully form a film. The hardness of the obtained silicone material was improved to a certain extent, and it had good anti-protein non-specific adsorption ability and anti-swelling performance.
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