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Anti-static anti-bacterial chitosan-casein composite leather finishing agent and preparation method thereof

A leather finishing agent, chitosan technology, applied in the direction of chitin polysaccharide coatings, conductive coatings, casein coatings, etc., to achieve the effect of improving quality and grade, increasing commercial value and good stability

Active Publication Date: 2018-07-31
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there are few reports on the introduction of other natural products for compound modification to endow the modified product with functionality

Method used

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  • Anti-static anti-bacterial chitosan-casein composite leather finishing agent and preparation method thereof
  • Anti-static anti-bacterial chitosan-casein composite leather finishing agent and preparation method thereof

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preparation example Construction

[0029] The invention provides a kind of preparation method of antistatic antibacterial chitosan-casein composite leather finishing agent, it is characterized in that, comprises the following steps:

[0030] Step 1: dissolving of chitosan;

[0031] Step 2: the dissolution of casein;

[0032] Step 3: Preparation of chitosan-casein composite leather finishing agent.

[0033] Described step is specifically: following is volume fraction,

[0034] Step 1: Dissolution of chitosan

[0035] Dissolve 1g~4g chitosan in 1%~8% acetic acid aqueous solution, set the temperature, stir, and the obtained solution is liquid A;

[0036] Step 2: Dissolution of casein

[0037] Dissolve 2~6g casein in 3%~5% acidic aqueous solution at a certain temperature, and stir, the obtained solution is B liquid;

[0038] Step 3: Preparation of chitosan-casein composite leather finishing agent

[0039] After ultrasonicating liquid A for 15 minutes, add liquid B dropwise into liquid A, heat up, stir, and tu...

Embodiment 1

[0047] Step 1: Dissolution of chitosan

[0048] Dissolve 1g of chitosan in 5% acetic acid aqueous solution prepared in advance, set the temperature at 55°C, adjust the speed at 400r / min, and stir overnight. The reaction time was 12 hours, and the resulting solution was marked as liquid A.

[0049] Step 2: Dissolution of casein

[0050] Dissolve casein in 5% acetic acid aqueous solution under the condition of temperature of 60°C, adjust the rotation speed to 300r / min, and stir for 2 hours. The resulting solution was labeled as solution B.

[0051] Step 3: Preparation of chitosan-casein composite leather finishing agent

[0052]After the liquid A dissolved according to step 1 is ultrasonicated for 15 minutes, then add the liquid B to the liquid A drop by drop, set the temperature at 60°C, adjust the speed at 300r / min, and stir for 4 hours. The obtained solution is marked as liquid C. Add 2% glycerin and 2% polydimethylsiloxane to liquid C, and the emulsification time is 10 m...

Embodiment 2

[0054] Step 1: Dissolution of Chitosan

[0055] Dissolve 2g of chitosan in 3% acetic acid aqueous solution prepared in advance, set the temperature at 60°C, adjust the speed at 400r / min, and stir overnight. The reaction time was 10h, and the resulting solution was marked as liquid A.

[0056] Step 2: Dissolution of casein

[0057] Dissolve the casein in 3% acetic acid aqueous solution under the condition of 65°C, adjust the rotation speed to 300r / min, and stir for 3 hours. The resulting solution was labeled as solution B.

[0058] Step 3: Preparation of chitosan-casein composite leather finishing agent

[0059] After the liquid A dissolved according to step 1 was ultrasonicated for 10 minutes, then the liquid B was added dropwise to the liquid A, the temperature was set at 70°C, and the speed was adjusted to 300r / min, and stirred for 3 hours. The obtained solution was marked as C liquid, and in the Add 1% glycerin and 1% polydimethylsiloxane to liquid C, emulsify for 5 min...

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Abstract

The invention provides a preparation method of an anti-static anti-bacterial chitosan-casein composite leather finishing agent. The preparation method of the anti-static anti-bacterial chitosan-caseincomposite leather finishing agent includes the following steps of 1, dissolving chitosan; 2, dissolving casein; 3, preparing the anti-static anti-bacterial chitosan-casein composite leather finishingagent. Raw materials adopted in the preparation method are biodegradable; a composite technology is adopted, so that the preparation method is simple, the stability of products is good, the preparedanti-static anti-bacterial chitosan-casein composite leather finishing agent is a natural-product-based leather finishing agent with two functions of preventing static and bacteria.

Description

technical field [0001] The invention belongs to the technical field, and relates to an antistatic and antibacterial chitosan-casein composite leather finishing agent and a preparation method thereof. Background technique [0002] Leather finishing agent is a general term for a class of additives used to protect and beautify leather on the surface of leather. Its use can increase the appearance of leather, prolong the service life of leather, significantly improve the quality and grade of leather products, and increase commercial value. With the continuous development of science and technology, the change of consumers' concept and the raising of environmental protection issues, people have higher and higher requirements for the greening and functionalization of leather finishing agents. As a natural product, casein film has the advantages of strong adhesion and high temperature resistance, and has been widely used in leather finishing agents; however, casein film is hard, br...

Claims

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Application Information

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IPC IPC(8): C09D5/14C09D5/24C09D105/08C09D189/00C09D7/65C14C11/00
CPCC08L2201/04C08L2201/06C08L2205/03C09D5/14C09D5/24C09D7/65C09D105/08C09D189/005C14C11/006C08L89/005C08L83/04C08L5/08
Inventor 马建中安文徐群娜
Owner SHAANXI UNIV OF SCI & TECH
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