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Guanidine salt antibacterial agent grafted modified polyvinylidene fluoride and preparation method thereof

A polyvinylidene fluoride, graft modification technology, applied in the manufacture of rayon, single-component halogenated hydrocarbon rayon, chemical characteristics of fibers, etc., can solve the problem of easy removal of antibacterial components and achieve long-lasting excellent The effect of broad-spectrum antibacterial ability

Active Publication Date: 2020-04-07
EAST CHINA UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a kind of guanidinium salt antibacterial agent grafted polyvinylidene fluoride and preparation method thereof, the present invention grafts guanidinium salt antibacterial agent on PVDF in the mode of chemical bonding, to solve traditional antibacterial modification The problem of easy removal of antibacterial components in the medium endows PVDF materials with long-lasting, high-efficiency, broad-spectrum antibacterial and antifungal properties, and is safe for humans and the environment

Method used

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  • Guanidine salt antibacterial agent grafted modified polyvinylidene fluoride and preparation method thereof
  • Guanidine salt antibacterial agent grafted modified polyvinylidene fluoride and preparation method thereof
  • Guanidine salt antibacterial agent grafted modified polyvinylidene fluoride and preparation method thereof

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Effect test

Embodiment 1

[0046] Immerse 20g of PVDF (molecular weight: 270,000) in a 1mol / L sodium hydroxide aqueous solution, stir at 60°C for 30 minutes, then filter with suction and wash with deionized water until neutral, and dry in a vacuum oven for 24 hours to obtain 19.5g of alkali Treated PVDF powder. Then take 10 grams of the above powder and dissolve in 90 grams of N,N-dimethylformamide, add 2.22 grams of glycidyl methacrylate and 1.89 grams of benzoyl peroxide, and react at 75° C. for 12 hours. Finally, 1 g of polyhexamethyleneguanidine hydrochloride was dissolved in 10 ml of ethanol and added to the reaction solution, and reacted at 50° C. for 18 hours, and the resulting solution was named P1.

Embodiment 2

[0048] Immerse 20g of PVDF (molecular weight: 270,000) in a 4mol / L aqueous solution of sodium orthosilicate, stir at 50°C for 40 minutes, filter with suction, wash with deionized water until neutral, and dry in a vacuum oven for 24 hours to obtain 19.5g PVDF powder after alkali treatment. Then take 15 grams of the above powder and dissolve in 85 grams of N,N-dimethylacetamide, add 1.79 grams of allyl glycidyl ether and 1.89 grams of benzoyl peroxide, and react at 80° C. for 8 hours. Finally, 1 g of polyhexamethylene guanidine phosphate was dissolved in 5 ml of methanol and added to the reaction solution, and reacted at 60° C. for 12 hours, and the resulting solution was named P2.

Embodiment 3

[0050] Immerse 20g of PVDF (molecular weight: 540,000) in an aqueous solution of 2mol / L potassium hydroxide, stir at 60°C for 20 minutes, filter with suction, wash with deionized water until neutral, and dry in a vacuum oven for 24 hours to obtain 19.5g of alkali Treated PVDF powder. Then take 10 grams of the above powder and dissolve in 90 grams of N-methylpyrrolidone, add 3.33 grams of glycidyl methacrylate and 2.13 grams of dicumyl peroxide, and react at 85° C. for 4 hours. Finally, 1.5 g of polyhexamethyleneguanidine nitrate was dissolved in 10 ml of dimethyl sulfoxide and added to the reaction solution, and reacted at 70° C. for 8 hours, and the resulting solution was named P3.

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Abstract

The invention relates to guanidine salt antibacterial agent grafted modified polyvinylidene fluoride and a preparation method thereof. The preparation method comprises the following steps: firstly, grafting a bifunctional or polyfunctional monomer with double bonds and an epoxy group onto a PVDF main chain by adopting a chemical grafting method; secondly, grafting an antibacterial agent onto the polymer by utilizing high reaction activity of a guanidine salt antibacterial agent and an epoxy group to obtain PVDF with excellent antibacterial performance; and finally, compounding the PVDF with excellent antibacterial performance and unmodified PVDF according to a certain proportion, and preparing fibers, films or other products through a phase inversion method or other processes. Compared with the prior art, the guanidine salt antibacterial agent is firmly bonded to PVDF through a chemical grafting method, and excellent and lasting antibacterial and mildew-proof performance is given to PVDF.

Description

technical field [0001] The invention relates to the technical field of antibacterial materials, in particular to a graft-modified polyvinylidene fluoride of a guanidinium salt antibacterial agent and a preparation method thereof. Background technique [0002] Polyvinylidene fluoride (PVDF) has the characteristics of good mechanical properties, chemical stability, heat resistance, radiation resistance, weather resistance and easy film formation. molecular material. However, due to the low surface energy and poor hydrophilicity of PVDF, it is easy to adsorb bacteria, colloids, proteins or other organic substances during use, and then the bacteria reproduce and metabolize on the surface and pores of the PVDF membrane, resulting in the formation of a layer of microbial film on the surface of the PVDF membrane. Cause irreversible pollution of PVDF membrane, resulting in shortened membrane life. In order to solve the above problems, PVDF can be endowed with excellent antibacteri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/16C08L51/00C08L79/02D01F1/10D01F6/48C08J5/18C08F259/08C08F220/32C08F216/14
CPCC08F259/08C08J5/18C08J2327/16C08J2351/00C08J2451/00C08J2479/02D01F1/103D01F6/48C08F216/1416
Inventor 管涌陈福修魏星光危大福郑安呐许祥王勤麻丽峰丁秉贤
Owner EAST CHINA UNIV OF SCI & TECH
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