CN102995462A - Natural antibacterial coloured fabric and preparation method thereof - Google Patents

Abstract

The invention discloses a natural antibacterial colored fabric, which is a natural antibacterial colored fabric containing chestnut shell extract. The preparation method of the present invention is as follows: drying and pulverizing the washed chestnut shells, extracting and filtering the chestnut shell pigment stock solution in a weak alkali solution, concentrating, drying and crushing the chestnut shell pigment stock solution to obtain powdery natural chestnut Shell pigment; Finally, the chestnut shell pigment is used for fabric dyeing, so that the fabric has antibacterial properties while obtaining color. The preparation process of the invention is simple, low in cost, easy for large-scale production and strong in antibacterial ability.

Description

A kind of natural antibacterial colored fabric and preparation method thereof

technical field

The invention relates to the field of functional fabrics, in particular to a natural antibacterial colored fabric and a preparation process thereof.

Background technique

With the development of science and technology and the improvement of people's living standards, people pay more and more attention to a healthy and safe lifestyle. A large number of pathogenic bacteria are attached to various fabrics that people wear daily, and these pathogenic bacteria are an important source of infection for many diseases; in addition, people are constantly pursuing new fabric colors. Therefore, the development of antibacterial colored fabrics has social Meaningful and economical.

Generally speaking, antibacterial fabrics can be obtained by two methods, one is to directly develop antibacterial fabrics with antibacterial fibers; the other is to finish the fabrics with antibacterial finishing agents, and then fix the antibacterial finishing agents on the fibers. Natural antibacterial fabric is a fabric with antibacterial properties prepared by finishing the fabric with natural antibacterial agents, so that the antibacterial agents are fixed on the fibers.

At present, natural antibacterial fabrics are mainly made of natural antibacterial agents and other chemicals into microcapsules and added to the fabrics by means of dipping, padding, etc., as described in patents with publication number CN102367634A and publication number CN102359014A. In the preparation process of natural antibacterial colored fabrics, the following problems need to be solved:

(1) Although it is a natural extract, it must be prepared into microcapsules and fixed on the base cloth. In the process of preparing microcapsules, chemicals such as polyvinyl alcohol and glutaraldehyde will be added as microcapsule wall materials (for example, publication number CN102367634A and Publication No. CN102359014A), these chemicals are irritating to the eyes and other places of the human body, and there is no pure natural antibacterial finishing for the time being;

(2) At present, most antibacterial fabrics are prepared by dyeing first and then antibacterial finishing. Synthetic dyes are added to the fabrics during the dyeing process. Synthetic dyes have obvious or potential hazards to the human body. At present, there is no report on fabric dyeing and antibacterial finishing at the same time;

The yield of the previous extract is relatively low, only about 11% when using microwave and other instruments, and the extraction rate can only reach 4%~5% when using conventional methods, and the extraction rate is low.

Contents of the invention

The object of the present invention is to provide a kind of natural environment-friendly fabric with antibacterial function and its preparation method.

The invention provides a natural antibacterial colored fabric, which uses chestnut shell extract as a natural antibacterial dyeing agent to dye and antibacterially finish the fabric. In this way, during the preparation process, the dyeing and antibacterial finish of the fabric are carried out simultaneously.

The present invention also provides a kind of preparation method of above-mentioned natural antibacterial colored fabric, concrete steps are:

(1) Preparation of chestnut shell extract: wash the chestnut shell, dry it, crush it to 50-200 mesh, add it to the weak alkaline aqueous solution, heat and reflux to extract, and obtain the extract, filter the extract, and filter the The final filter residue was added to the same weakly alkaline aqueous solution, heated and refluxed for 2 to 3 times, the filtrate was combined, and the combined filtrate was concentrated to 1/3 to 1/5 of the volume of the original solution. Blast drying, crushing to obtain chestnut shell extract,

As preferably: weak alkaline aqueous solution is the aqueous solution of sodium carbonate or salt of wormwood, and the consumption of sodium carbonate or salt of wormwood is 0.10%～0.15% of chestnut shell quality, and the quality of water is 8～16 times of chestnut shell quality,

As a preference: in the heating and reflux extraction operation, the heating temperature is 80-90°C, and the extraction time is 1.5-2.5h;

(2) The dyeing operation of the fabric, the chestnut shell extract is made into a dyeing solution, and the wet fabric is mixed with the chestnut shell extract. The mass content is 1%~5% of the fabric mass, the temperature is 90~95°C, and the pH 3~5, dyeing in the dyeing solution with a bath ratio of 1:30~1:90 for 30~60min, wash the fabric with water after dyeing, and dry the dyed fabric at 100°C.

The invention also provides an application of the chestnut shell extract, which can be used as a natural antibacterial dyeing agent to perform antibacterial treatment on the fabric while dyeing the fabric.

The beneficial effects of the present invention are:

In the process of preparing natural antibacterial agents to natural antibacterial colored fabrics, only two chemicals, sodium carbonate (or potassium carbonate and other carbonates) and acetic acid, are added. These two chemicals are harmless or minimally harmful to the human body, so The obtained antibacterial colored fabric is also pure natural, safe and environmentally friendly;

During the dyeing process, the fabric is also antibacterially finished, reducing costs and improving benefits;

The extraction rate of chestnut shell extract is high, which can reach 18%~20%, which improves the utilization rate of chestnut shell and improves economic benefits.

Detailed ways

Example 1

Weigh 50g of chestnut shells, wash them with water, dry them, crush them, add 400mL of an aqueous solution containing 0.050g of sodium carbonate, reflux and extract at 80°C for 1.5h, and extract twice, combine all filtrates, and filter to obtain chestnuts Shell pigment stock solution: Concentrate the chestnut shell pigment stock solution to 1/5 of the original solution volume, blow dry it at 85°C, and crush it to 50 meshes to obtain powdered natural chestnut shell pigment with an extraction rate of 17.67% and a yellow color brown.

Immerse the cotton in water to fully moisten it, take it out, wring it out, and put it into the chestnut shell dyeing solution for dyeing. The dyeing conditions are that the amount of dyestuff is 1% of the cotton mass, the dyeing temperature is 90°C, the pH value is 5, and the dyeing time is 30 minutes. The liquor ratio is 1:30, soaping after dyeing, and drying to obtain yellow-brown cotton fabric.

Cut the cotton dyed with the chestnut shell dye solution into a circle with a diameter of 2cm, and cut the undyed cotton as a blank sample into a circle with a diameter of 2cm for later use, and then use it according to GB/T20944.2——2007 agar plate The solid nutrient base prepared by the diffusion method was sterilized at 121°C for 20 minutes, poured into a watch glass while it was hot, cooled, and coated with Escherichia coli and Staphylococcus aureus after condensation, and the dyed cotton and blank samples were tightly attached to the solid On the nutrient medium, cultivated in the incubator for 18 hours, it was observed that the antibacterial rate of the treated cotton to Escherichia coli was 72%, and the antibacterial rate to Staphylococcus aureus was 76%. The antibacterial rates of cocci were 12% and 14%, respectively.

Example 2

Weigh 50g of chestnut shells, wash them with water, dry them, crush them, add 500mL of an aqueous solution containing 0.055g of sodium carbonate, reflux and extract at 85°C for 2.0h, and the number of extractions is 3 times, combine all the filtrates, and filter to obtain chestnuts Shell pigment stock solution: Concentrate the chestnut shell pigment stock solution to 1/4 of the original solution volume, blow dry it at 80°C, and crush it to 100 meshes to obtain powdered natural chestnut shell pigment with an extraction rate of 19.34% and a yellow color brown.

Immerse the silk in water to fully moisten it, take it out, wring it out, and put it into the chestnut shell dye solution for dyeing. The dyeing conditions are that the amount of dye is 1% of the mass of the silk, the dyeing temperature is 91°C, the pH value is 5, and the dyeing time is 40 minutes. The liquor ratio is 1:45, soaping after dyeing, and drying to obtain yellow-brown silk fabric.

Cut the silk dyed by the chestnut shell dye solution into a circle with a diameter of 2cm, and cut the undyed silk as a blank sample into a circle with a diameter of 2cm, and set it aside, then use it according to GB/T20944.2——2007 agar plate The solid nutrient base prepared by the diffusion method was sterilized at 121°C for 20 minutes, poured into a watch glass while it was hot, and cooled, and coated with Escherichia coli and Staphylococcus aureus after condensation, and the dyed silk and blank samples were tightly attached to the solid On the nutrient medium, cultivated in the incubator for 18 hours, it was observed that the antibacterial rate of the treated silk to Escherichia coli was 79%, and the antibacterial rate to Staphylococcus aureus was 82%. The antibacterial rates of cocci were 13% and 15%, respectively.

Example 3

Weigh 50g of chestnut shells, wash them with water, dry them, crush them, add 600mL of an aqueous solution containing 0.075g of sodium carbonate, reflux and extract at 90°C for 2.5h, and extract 3 times, combine all filtrates, and filter to obtain chestnuts Shell pigment stock solution: Concentrate the chestnut shell pigment stock solution to 1/3 of the original solution volume, blow dry it at 75°C, and crush it to 50 meshes to obtain powdered natural chestnut shell pigment with an extraction rate of 20.16% and a yellow color brown.

Immerse the cotton in water to fully moisten it, take it out, wring it out, and put it into the chestnut shell dye solution for dyeing. The dyeing conditions are that the amount of dyestuff is 5% of the cotton mass, the dyeing temperature is 95°C, the pH value is 4, and the dyeing time is 60 minutes. The bath ratio is 1:60, soaping after dyeing, and drying to obtain yellow-brown cotton fabric.

Cut the cotton dyed with the chestnut shell dye solution into a circle with a diameter of 2cm, and cut the undyed cotton as a blank sample into a circle with a diameter of 2cm for later use, and then use it according to GB/T20944.2——2007 agar plate The solid nutrient base prepared by the diffusion method was sterilized at 121°C for 20 minutes, poured into a watch glass while it was hot, cooled, and coated with Escherichia coli and Staphylococcus aureus after condensation, and the dyed cotton and blank samples were tightly attached to the solid On the nutrient medium, cultured in the incubator for 18 hours, it was observed that the treated cotton had an antibacterial rate of 96% to Escherichia coli, and an antibacterial rate of 94% to Staphylococcus aureus. The antibacterial rates of cocci were 12% and 14%, respectively.

Example 4

Weigh 50g of chestnut shells, wash them with water, dry them, crush them, add 700mL of an aqueous solution containing 0.060g of sodium carbonate, reflux and extract at 87°C for 2.0h, and extract for 3 times, combine all filtrates, and filter to obtain chestnuts Shell pigment stock solution: Concentrate the chestnut shell pigment stock solution to 1/4 of the original solution volume, blow dry it at 80°C, and crush it to 120 mesh to obtain powdered natural chestnut shell pigment with an extraction rate of 19.28% and a yellow color brown.

Immerse the silk in water to fully moisten it, take it out, wring it out, and put it into the chestnut shell dye solution for dyeing. The dyeing conditions are that the amount of dyestuff is 3% of the silk mass, the dyeing temperature is 92°C, the pH value is 3, and the dyeing time is 50 minutes. The liquor ratio is 1:90, soaping after dyeing, and drying to obtain a yellow-brown silk fabric.

Cut the silk dyed by the chestnut shell dye solution into a circle with a diameter of 2cm, and cut the undyed silk as a blank sample into a circle with a diameter of 2cm, and set it aside, then use it according to GB/T20944.2——2007 agar plate The solid nutrient base prepared by the diffusion method was sterilized at 121°C for 20 minutes, poured into a watch glass while it was hot, and cooled, and coated with Escherichia coli and Staphylococcus aureus after condensation, and the dyed silk and blank samples were tightly attached to the solid On the nutrient medium, cultivated in the incubator for 18 hours, it was observed that the antibacterial rate of the treated silk to Escherichia coli was 85%, and the antibacterial rate to Staphylococcus aureus was 85%. The antibacterial rates of cocci were 13% and 15%, respectively.

Comparative example 1

Weigh 50g of chestnut shells, wash them with water, dry them, crush them, add 400mL of aqueous solution containing 0.050g of sodium carbonate, reflux and extract at 93°C for 3.0h, the number of extractions is 2 times, combine all the filtrates, and filter to obtain chestnuts Shell pigment stock solution: Concentrate the chestnut shell pigment stock solution to 1/5 of the original solution volume, blow dry it at 85°C, and crush it to 50 meshes to obtain powdered natural chestnut shell pigment with an extraction rate of 17.68% and a yellow color brown. Compared with Example 1, although the extraction temperature was increased and the extraction time was prolonged, the extraction rate of chestnut shells was not significantly improved, so the extraction temperature should be lower than 90°C and the extraction time should be lower than 2.5h, which can reduce the energy supply cost.

Immerse the cotton in water to fully moisten it, take it out, wring it out, and put it into the chestnut shell dye solution for dyeing. The dyeing conditions are that the amount of dyestuff is 8% of the cotton mass, the dyeing temperature is 95°C, the pH value is 4, and the dyeing time is 60 minutes. The ratio is 1:60, soaping after dyeing, and drying to obtain yellow-brown cotton fabric.

Cut the cotton dyed with the chestnut shell dye solution into a circle with a diameter of 2cm, and cut the undyed cotton as a blank sample into a circle with a diameter of 2cm for later use, and then use it according to GB/T20944.2——2007 agar plate The solid nutrient base prepared by the diffusion method was sterilized at 121°C for 20 minutes, poured into a watch glass while it was hot, cooled, and coated with Escherichia coli and Staphylococcus aureus after condensation, and the dyed cotton and blank samples were tightly attached to the solid On the nutrient medium, cultured in the incubator for 18 hours, it was observed that the antibacterial rate of the treated cotton to Escherichia coli was 96%, and the antibacterial rate to Staphylococcus aureus was 94%. Compared with Example 3, although the amount of dyestuff is increased to 8% of the cotton quality, the antibacterial effect is not improved, so the amount of dyestuff does not need to exceed 5% of the fabric.

Comparative example 2

Weigh 50g of chestnut shells, wash them with water, dry them, crush them, add 500mL of aqueous solution containing 0.020g of sodium carbonate, reflux and extract at 85°C for 2.0h, and extract for 3 times, combine all filtrates, and filter to obtain chestnuts Shell pigment stock solution: Concentrate the chestnut shell pigment stock solution to 1/4 of the original solution volume, blow dry it at 80°C, and crush it to 100 mesh to obtain powdered natural chestnut shell pigment with an extraction rate of 13.17% and a yellow color Brown, compared to Example 2, due to the reduction of the amount of sodium carbonate, the extraction rate of chestnut shells decreased, so the amount of sodium carbonate is preferably 0.10% ~ 0.15% of the quality of chestnut shells.

Immerse the silk in water to fully moisten it, take it out, wring it out, and put it into the chestnut shell dye solution for dyeing. The dyeing conditions are that the amount of dye is 0.5% of the mass of the silk, the dyeing temperature is 91°C, the pH value is 5, and the dyeing time is 40 minutes. The liquor ratio is 1:45, soaping after dyeing, and drying to obtain yellow-brown silk fabric.

Cut the silk dyed by the chestnut shell dye solution into a circle with a diameter of 2cm, and cut the undyed silk as a blank sample into a circle with a diameter of 2cm, and set it aside, then use it according to GB/T20944.2——2007 agar plate The solid nutrient base prepared by the diffusion method was sterilized at 121°C for 20 minutes, poured into a watch glass while it was hot, and cooled, and coated with Escherichia coli and Staphylococcus aureus after condensation, and the dyed silk and blank samples were tightly attached to the solid On the nutrient medium, cultivated in the incubator for 18h, it was observed that the treated silk had an antibacterial rate of 64% to Escherichia coli, and an antibacterial rate of 72% to Staphylococcus aureus. As the proportion of silk mass decreases, the antibacterial rate of treated silk against germs decreases. Therefore, it is more appropriate to use dyes in the range of 1-5% of the fabric.

Comparative example 3

Weigh 50g of chestnut shells, wash them with water, dry them, crush them, add 600mL of aqueous solution containing 0.1g of sodium carbonate, reflux and extract at 90°C for 2.5h, and extract 3 times, combine all filtrates, and filter to obtain chestnuts Shell pigment stock solution: Concentrate the chestnut shell pigment stock solution to 1/3 of the original solution volume, blow dry it at 75°C, and crush it to 50 meshes to obtain powdered natural chestnut shell pigment with an extraction rate of 20.18% and a yellow color brown. Compared with Example 3, although the amount of sodium carbonate has increased, the extraction rate of chestnut shells has not improved significantly, so the amount of sodium carbonate does not need to exceed 0.15%.

Immerse the cotton in water to fully moisten it, take it out, wring it out, and put it into the chestnut shell dye solution for dyeing. The dyeing conditions are that the amount of dyestuff is 5% of the cotton mass, the dyeing temperature is 85°C, the pH value is 4, and the dyeing time is 60 minutes. The ratio is 1:60, soaping after dyeing, and drying to obtain yellow-brown cotton fabric.

Cut the cotton dyed with the chestnut shell dye solution into a circle with a diameter of 2cm, and cut the undyed cotton as a blank sample into a circle with a diameter of 2cm for later use, and then use it according to GB/T20944.2——2007 agar plate The solid nutrient base prepared by the diffusion method was sterilized at 121°C for 20 minutes, poured into a watch glass while it was hot, cooled, and coated with Escherichia coli and Staphylococcus aureus after condensation, and the dyed cotton and blank samples were tightly attached to the solid On the nutrient medium, cultured in the incubator for 18 hours, it was observed that the antibacterial rate of the treated cotton to Escherichia coli was 86%, and the antibacterial rate to Staphylococcus aureus was 83%. Compared with Example 3, the dyeing temperature is 85°C, and the antibacterial rate of the treated cotton against germs decreases, so the dyeing temperature is more suitable in the range of 90-95°C.

Claims (6)

1. A natural antibacterial colored fabric, characterized in that: described antibacterial colored fabric is, with chestnut shell extract as natural antibacterial dyeing agent, fabric is dyed and antibacterial finishing. 2. The preparation method of natural antibacterial colored fabric as claimed in claim 1: it is characterized in that: in the described preparation method process, the dyeing and antibacterial finishing of fabric are carried out simultaneously. 3. the preparation method of natural antibacterial colored fabric as claimed in claim 2: it is characterized in that: the specific steps of described preparation method are: (1) Preparation of chestnut shell extract: wash the chestnut shell, dry it, crush it to 50-200 mesh, add it to the weak alkaline aqueous solution, heat and reflux to extract, and obtain the extract, filter the extract, and filter the The final filter residue was added to the same weakly alkaline aqueous solution, heated and refluxed for 2 to 3 times, the filtrate was combined, and the combined filtrate was concentrated to 1/3 to 1/5 of the volume of the original solution. Dried by blowing air and crushed to obtain chestnut shell extract; (2) The dyeing operation of the fabric, the chestnut shell extract is made into a dyeing solution, and the wet fabric is mixed with the chestnut shell extract. The mass content is 1%~5% of the fabric mass, the temperature is 90~95°C, and the pH 3~5, dyeing in the dyeing solution with a bath ratio of 1:30~1:90 for 30~60min, wash the fabric with water after dyeing, and dry the dyed fabric at 100°C. 4. the preparation method of natural antibacterial colored fabric as claimed in claim 3: it is characterized in that: the weak alkaline aqueous solution described in step (1) is the aqueous solution of sodium carbonate or potassium carbonate, and the consumption of sodium carbonate or potassium carbonate is The mass of chestnut shell is 0.10%~0.15%, and the mass of water is 8~16 times of the mass of chestnut shell. 5. The preparation method of natural antibacterial colored fabric as claimed in claim 3: it is characterized in that: in the heating reflux extraction operation described in step (1), the heating temperature is 80~90°C, and the extraction time is 1.5~ 2.5h. 6. the application of the chestnut shell extract as described in any one of claim 1 to 5, it is characterized in that: described application is, chestnut shell extract can be used as natural antibacterial dyeing agent, when fabric is dyed, Antimicrobial treatment of fabrics.