Disclosure of Invention
Based on the technical problems in the background art, the invention provides a preparation method of an egg white peptide finishing agent for fabrics.
The technical scheme of the invention is as follows:
a preparation method of an egg white peptide finishing agent for fabrics comprises the following steps:
step one, hydrolyzing egg materials to obtain egg white hydrolysate;
step two, hydrolyzing the eggs by using protease, and then carrying out precipitation separation to obtain supernatant;
step three, dialyzing the supernatant to obtain a polypeptide solution;
step four, reacting chitosan with the polypeptide solution at 55-65 ℃ and pH of 5.2-5.8 for 7-10h to obtain polypeptide chitosan;
fifthly, adding a silane coupling agent, and carrying out modification reaction with polypeptide chitosan for 18-24h at the temperature of 55-65 ℃ to obtain a modified egg white peptide aqueous solution;
and sixthly, drying in vacuum to obtain the egg white peptide finishing agent.
Preferably, in the third step, the polypeptide solution contains 3-10% by weight of the polypeptide.
Preferably, in the fourth step, the chitosan and polypeptide solution is (2-8): 100.
further preferably, in the fourth step, the chitosan is quaternized chitosan.
Further preferably, the preparation method of the quaternized chitosan comprises the following steps: and adding glycidol trimethyl ammonium chloride into a chitosan acetic acid aqueous solution with the mass fraction of 2-5%, and heating for reacting for 8-10h to obtain the quaternized chitosan.
Preferably, in the fifth step, the silane coupling agent is KH-560.
Preferably, the method for finishing the fabric by the egg white peptide finishing agent comprises the following steps: a. preparing a finishing liquid; b. and (5) padding and drying the textile.
Preferably, in the step a, the content of the egg white peptide finishing agent in the finishing liquid is 25-35g/L, and the balance is deionized water.
The invention has the advantages that: the invention provides a preparation method of an egg white peptide finishing agent for fabrics, which comprises the following steps: hydrolyzing egg material to obtain egg white hydrolysate; hydrolyzing egg with protease, and separating precipitate to obtain supernatant; dialyzing the supernatant to obtain a polypeptide solution; then reacting chitosan with polypeptide solution at 55-65 deg.C and pH of 5.2-5.8 for 7-10h to obtain polypeptide chitosan; then adding a silane coupling agent to perform modification reaction with polypeptide chitosan for 18-24h at the temperature of 55-65 ℃ to obtain a modified egg white peptide aqueous solution; and drying in vacuum to obtain the egg white peptide finishing agent. The natural egg white peptide modified by enzymolysis has amino, hydroxyl and cationic properties, and has the effects of moisture absorption, moisture retention and antibiosis after finishing the fabric, so the natural egg white peptide is a natural moisture-retention antibacterial material.
Detailed Description
Example 1
A preparation method of an egg white peptide finishing agent for fabrics comprises the following steps:
step one, hydrolyzing egg materials to obtain egg white hydrolysate;
step two, hydrolyzing the eggs by using protease, and then carrying out precipitation separation to obtain supernatant;
step three, dialyzing the supernatant to obtain a polypeptide solution; the weight ratio content of the polypeptide is 6.5%;
step four, reacting quaternized chitosan with the polypeptide solution at 60 ℃ and pH of 5.5 for 8 hours to obtain polypeptide chitosan; the quaternized chitosan and polypeptide solution is 5: 100, respectively;
fifthly, adding a silane coupling agent KH-560, and carrying out modification reaction with polypeptide chitosan at 60 ℃ for 20h to obtain a modified egg white peptide aqueous solution;
and sixthly, drying in vacuum to obtain the egg white peptide finishing agent.
In the fourth step, the preparation method of the quaternized chitosan comprises the following steps: and adding glycidol trimethyl ammonium chloride into a chitosan acetic acid aqueous solution with the mass fraction of 3.5%, and heating for reacting for 8.5h to obtain the quaternized chitosan.
Example 2
A preparation method of an egg white peptide finishing agent for fabrics comprises the following steps:
step one, hydrolyzing egg materials to obtain egg white hydrolysate;
step two, hydrolyzing the eggs by using protease, and then carrying out precipitation separation to obtain supernatant;
step three, dialyzing the supernatant to obtain a polypeptide solution; the weight ratio content of the polypeptide is 10%;
step four, reacting quaternized chitosan with the polypeptide solution at 65 ℃ and pH of 5.2 for 10 hours to obtain polypeptide chitosan; the quaternized chitosan and polypeptide solution is 2: 100, respectively;
fifthly, adding a silane coupling agent KH-560, and carrying out modification reaction with polypeptide chitosan at 65 ℃ for 18h to obtain a modified egg white peptide aqueous solution;
and sixthly, drying in vacuum to obtain the egg white peptide finishing agent.
In the fourth step, the preparation method of the quaternized chitosan comprises the following steps: and adding glycidol trimethyl ammonium chloride into a chitosan acetic acid aqueous solution with the mass fraction of 5%, and heating for reacting for 8 hours to obtain the quaternized chitosan.
Example 3
A preparation method of an egg white peptide finishing agent for fabrics comprises the following steps:
step one, hydrolyzing egg materials to obtain egg white hydrolysate;
step two, hydrolyzing the eggs by using protease, and then carrying out precipitation separation to obtain supernatant;
step three, dialyzing the supernatant to obtain a polypeptide solution; the weight ratio content of the polypeptide is 3%;
step four, reacting quaternized chitosan with the polypeptide solution at 55 ℃ and pH of 5.8 for 7 hours to obtain polypeptide chitosan; the quaternized chitosan and polypeptide solution is 8: 100, respectively;
fifthly, adding a silane coupling agent KH-560, and carrying out modification reaction with polypeptide chitosan for 24 hours at the temperature of 55 ℃ to obtain a modified egg white peptide aqueous solution;
and sixthly, drying in vacuum to obtain the egg white peptide finishing agent.
In the fourth step, the preparation method of the quaternized chitosan comprises the following steps: and adding glycidol trimethyl ammonium chloride into a chitosan acetic acid aqueous solution with the mass fraction of 2%, and heating for reaction for 10 hours to obtain the quaternized chitosan.
Example 4
A preparation method of an egg white peptide finishing agent for fabrics comprises the following steps:
step one, hydrolyzing egg materials to obtain egg white hydrolysate;
step two, hydrolyzing the eggs by using protease, and then carrying out precipitation separation to obtain supernatant;
step three, dialyzing the supernatant to obtain a polypeptide solution; the weight ratio content of the polypeptide is 8%;
step four, reacting quaternized chitosan with the polypeptide solution at 62 ℃ and pH of 5.2 for 7 hours to obtain polypeptide chitosan; the quaternized chitosan and polypeptide solution is 8: 100, respectively;
fifthly, adding a silane coupling agent KH-560, and carrying out modification reaction with polypeptide chitosan at 65 ℃ for 18h to obtain a modified egg white peptide aqueous solution;
and sixthly, drying in vacuum to obtain the egg white peptide finishing agent.
In the fourth step, the preparation method of the quaternized chitosan comprises the following steps: and adding glycidol trimethyl ammonium chloride into a chitosan acetic acid aqueous solution with the mass fraction of 2%, and heating for reaction for 10 hours to obtain the quaternized chitosan.
Example 5
A preparation method of an egg white peptide finishing agent for fabrics comprises the following steps:
step one, hydrolyzing egg materials to obtain egg white hydrolysate;
step two, hydrolyzing the eggs by using protease, and then carrying out precipitation separation to obtain supernatant;
step three, dialyzing the supernatant to obtain a polypeptide solution; the weight ratio content of the polypeptide is 10%;
step four, reacting quaternized chitosan with the polypeptide solution at 65 ℃ and pH of 5.8 for 10 hours to obtain polypeptide chitosan; the quaternized chitosan and polypeptide solution is 2: 100, respectively;
fifthly, adding a silane coupling agent KH-560, and carrying out modification reaction with polypeptide chitosan for 24 hours at the temperature of 55 ℃ to obtain a modified egg white peptide aqueous solution;
and sixthly, drying in vacuum to obtain the egg white peptide finishing agent.
In the fourth step, the preparation method of the quaternized chitosan comprises the following steps: and adding glycidol trimethyl ammonium chloride into a chitosan acetic acid aqueous solution with the mass fraction of 5%, and heating for reaction for 10 hours to obtain the quaternized chitosan.
Comparative example 1
The quaternized chitosan in example 1 was replaced with unmodified chitosan, and the rest of the formulation and preparation method were unchanged.
Comparative example 2
Step five in example 1 was removed, and the rest of the formulation and preparation method were unchanged.
The egg white peptide finishes prepared in examples 1-5 and comparative examples 1-2 were tested as follows (taking a pure cotton fabric as an example), and a fabric finishing was first carried out, the steps of the process for finishing the fabric being as follows: a. preparing a finishing liquid; b. and (5) padding and drying the textile.
In the step a, the content of the egg white peptide finishing agent in the finishing liquid is 30g/L, and the balance is deionized water.
Test 1: antibacterial performance test, method AATCC 100-2012.
Table 1: the antibacterial property test results of the pure cotton fabrics of examples 1 to 3 and comparative examples 1 to 2;
| the antibacterial rate is%
|
Example 1
|
Example 2
|
Example 3
|
Comparative example 1
|
Comparative example 2
|
| Escherichia coli
|
99.9
|
99.9
|
99.9
|
92.8
|
72.8
|
| Staphylococcus aureus
|
99.9
|
99.9
|
99.9
|
94.1
|
81.7
|
| Candida albicans
|
99.9
|
99.9
|
99.9
|
90.7
|
68.5 |
From the above test data, it can be known that the egg white peptide finishing agent of the present invention has a very good antibacterial effect.
And (3) testing 2: the content of egg white peptide on the surface of the fabric is tested by the method according to GB/T5009.5-2016.
Table 2: the results of the egg white peptide content test on the surfaces of the fabrics of examples 1-3 and comparative examples 1-2;
| egg white peptide content%
|
Example 1
|
Example 2
|
Example 3
|
Comparative example 1
|
Comparative example 2
|
| Before washing with water
|
0.91
|
0.92
|
0.92
|
0.88
|
0.95
|
| After washing for 10 times
|
0.83
|
0.84
|
0.83
|
0.81
|
0.32 |
The test data show that the egg white peptide finishing agent has a very good fabric attachment effect.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.