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Method for preparing nylon surface grafting chitosan hydrophilic antibiotic material

A technology of surface grafting, antibacterial materials, applied in the fields of botanical equipment and methods, chemicals for biological control, biocides, etc.

Inactive Publication Date: 2010-11-10
SHENZHEN KEJU NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no research report on grafting natural biological antibacterial polymer chitosan after hydrolyzing and modifying the surface of nylon materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1: Put sheet-shaped PA66 (2cm×2cm) in 30% (W / W) concentrated hydrochloric acid solution and react for 5 minutes, take out the hydrolyzed nylon and wash it with deionized water before use. The degree of deacetylation of chitosan is 95%. Take 0.2g of chitosan and add 20g of water to prepare a 2% solution, add 0.2133g of buffering agent 4-morpholineethanesulfonic acid to adjust the pH value of the solution to 4.5-6.5, and add catalyst N-hydroxy 0.1151 g of succinimide and 0.1917 g of dehydrating agent 1-ethyl-(3,3-dimethylaminopropyl) carbodiimide hydrochloride were stirred rapidly and uniformly. Put the surface hydrolyzed nylon into the chitosan cross-linking solution and cross-link for 24 hours, take out the grafted chitosan and wash it to obtain the product.

Embodiment 2

[0021] Example 2: Put sheet-shaped PA66 (2cm×2cm) in 25% (W / W) sodium hydroxide solution and react for 5 minutes, take out the hydrolyzed nylon and wash it with deionized water before use. The degree of deacetylation of chitosan is 50%. Take 0.2g of chitosan and add 20g of water to prepare a 2% solution, add 0.2133g of buffering agent 4-morpholineethanesulfonic acid to adjust the pH of the solution to 4.5-6.5, and add catalyst N-hydroxy 0.1151 g of succinimide and 0.1917 g of dehydrating agent 1-ethyl-(3,3-dimethylaminopropyl) carbodiimide hydrochloride were stirred rapidly and uniformly. Put the surface hydrolyzed nylon into the chitosan cross-linking solution and cross-link for 24 hours, take out the grafted chitosan and wash it to obtain the product.

[0022] Performance evaluation methods and implementation standards

[0023] The antibacterial performance of modified antibacterial nylon is tested according to the test method specified in the "QB / T 2591-2003 Antibacterial ...

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PUM

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Abstract

The invention provides a method for preparing a nylon surface grafting chitosan hydrophilic antibiotic material, which comprises the steps of partially hydrolyzing amido bonds on the surface of a nylon material by utilizing concentrated acid or concentrated alkaline and preparing a surface modified nylon material by dewatering and crosslinking chitosan and surface hydrolyzed nylon via carbodiimide. The invention has simple process method and low cost. The modified nylon material has increased surface hydrophilicity and surface antibiotic effect.

Description

【Technical field】 [0001] The invention belongs to the technical field of polymer materials, and relates to a preparation method of a hydrophilic antibacterial material grafted with chitosan on the surface of nylon with simple process and non-toxicity. 【Background technique】 [0002] Nylon is one of the commonly used engineering plastics and has good stability in the temperature range of -30 to 110°C. In addition, it also has excellent heat resistance, high impact strength, small elastic deformation, friction resistance and shock absorption, and its low melt viscosity makes it easy to process and shape. Because of its outstanding comprehensive performance, nylon has been widely used in industrial fields as a plastic substrate. Nylon material has a certain degree of hydrophilicity because of the hydrophilic amide bond on the molecular chain, but if it is used in the textile industry, further improving its hydrophilicity will help improve the air permeability and moisture abso...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/12C08J3/24C08G81/00C08B37/08C08L77/00A01N43/16A01P1/00
Inventor 徐东徐永黄新政
Owner SHENZHEN KEJU NEW MATERIAL
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