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Antibacterial polypropylene block copolymer and preparation method thereof and modified material containing block copolymer

A technology of block copolymer and antibacterial polypropylene, which is applied in the field of copolymers, can solve the problems of PP matrix resin with great influence on mechanical properties, failure, and easy surface desorption, so as to avoid bacterial or fungal infection and the spread of diseases , huge application prospects and market value, the effect of excellent antibacterial properties

Active Publication Date: 2013-09-18
汕头市康家宝塑料制品实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although inorganic antibacterial agents have the advantages of high antibacterial efficiency, good heat resistance, and safe use, they have defects such as high price, delayed antibacterial effect, great influence on the mechanical properties of PP matrix resin, and easy surface desorption and failure.
Small molecule organic antibacterial agents have certain toxicity, and are easy to volatilize and lose, and have poor long-term effect; although macromolecular antibacterial agents have the advantages of good antibacterial performance, non-volatility, and will not penetrate into human or animal epidermis, due to the macromolecular antibacterial agent and The structure and properties of polypropylene are quite different, the adhesion to PP is poor, it is easy to lose, and the antibacterial long-term effect is poor. When the amount added is large, it is easy to affect the mechanical properties of the matrix material.

Method used

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  • Antibacterial polypropylene block copolymer and preparation method thereof and modified material containing block copolymer
  • Antibacterial polypropylene block copolymer and preparation method thereof and modified material containing block copolymer
  • Antibacterial polypropylene block copolymer and preparation method thereof and modified material containing block copolymer

Examples

Experimental program
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Effect test

Embodiment 1

[0036] Crack 50g of isotactic polypropylene at 350°C under the condition of nitrogen protection to prepare polypropylene with terminal double bonds, and then carry out addition reaction of terminal double bond polypropylene with hydrogen chloride or hydrogen bromide to obtain double-terminal halogen (chlorine or bromine) polypropylene.

[0037] Take 30g of self-made polypropylene with terminal chlorine (or terminal bromine) functionalization, dissolve it in xylene, add CuCl and bipyridine as catalyst and ligand respectively, and add 50ml of acrylic acid. Electromagnetically stirred in a constant temperature oil bath at 100°C for 12 hours, cooled, and filtered. The solid product was extracted with ethanol for 48h and dried for later use.

[0038]Weigh 30g of polypropylene / polyacrylic acid block copolymer (without bactericidal function) and dissolve it in xylene, add 10g of chitosan, and react under reflux for 4h. Cool, filter and dry to prepare polypropylene / polyacrylic acid ...

Embodiment 2

[0042] Take 30g of self-made polypropylene with terminal chlorine functionalization, dissolve it in xylene, add CuCl and bipyridine as catalyst and ligand respectively, and add 10g of p-vinylbenzyl tributylphosphine chloride. Electromagnetically stirred in a constant temperature oil bath at 100°C for 12 hours, cooled, and filtered. The solid product was extracted with ethanol for 48h, and dried to obtain a polypropylene block copolymer containing antibacterial polyvinylbenzyl tributylphosphorous chloride segment (its thermal weight loss diagram is as follows: figure 2 shown).

[0043] The molecular weight of the polypropylene segment in the block copolymer prepared in this embodiment is 4000 g / mol, and the molecular weight of the poly-p-vinylbenzyl tributylphosphorus chloride segment is 5400 g / mol.

[0044] The above-mentioned synthesized polypropylene block copolymer with antibacterial properties is blended with polypropylene resin to prepare a modified material, and the ad...

Embodiment 3

[0046] Take 30g of self-made polypropylene with terminal chlorine functionalization, dissolve it in xylene, add CuCl and bipyridine as catalyst and ligand respectively, and add 10g of vinylpyridine. Electromagnetically stirred in a constant temperature oil bath at 100°C for 12 hours, cooled, and filtered. The solid product was extracted with ethanol for 48 hours and dried to obtain a polypropylene block copolymer containing polyvinylpyridine segments (no antibacterial properties). The block copolymer is quaternized with dimethyl sulfate to obtain a polypropylene block copolymer (with antibacterial properties) containing polyvinylpyridine quaternary ammonium salt segments.

[0047] The molecular weight of the polypropylene segment in the block copolymer prepared in this embodiment is 7500 g / mol, and the molecular weight of the polyvinylpyridine quaternary ammonium salt segment is 4800 g / mol.

[0048] The above-mentioned synthesized polypropylene block copolymer with antibacter...

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Abstract

The invention relates to an antibacterial polypropylene block copolymer and a preparation method thereof and a modified material containing the antibacterial polypropylene block copolymer. The general formula of the antibacterial polypropylene block copolymer is S-I-S, wherein I is a hydrophilic matrix polypropylene chain segment, and S is an antibacterial functional chain segment; the antibacterial functional chain segment is quaternary ammonium polymethacrylate, chitosan polyacrylate, polypara-vinylbenzyltributyl phosphorus chloride or polyvinylpyridine quaternary ammonium; and the molecular weights of the hydrophilic matrix polypropylene chain segment and the antibacterial functional chain segment are 1,000-20,000g / mol respectively. According to the antibacterial polypropylene block copolymer and the preparation method thereof provided by the invention, the hydrophilic matrix polypropylene chain segment is combined with the specific antibacterial functional chain segment to form the antibacterial polypropylene block copolymer, thus the problems of the prior art are solved; the process is simple, and the cost is low; and in the obtained modified material, the adhesion of the copolymer is greatly improved, and the copolymer does not drop easily and has good durability, thus the antibacterial property is long-lasting while the mechanical properties of the matrix material are not influenced.

Description

technical field [0001] The invention relates to the field of copolymers, in particular to an antibacterial polypropylene block copolymer, a preparation method thereof, and a modified material containing the antibacterial polypropylene block copolymer. Background technique [0002] As a general-purpose thermoplastic, polypropylene (PP) has the characteristics of low density, good heat resistance, easy processing and molding, high heat distortion temperature, and low price, making it widely used. Especially in recent years, with the improvement and development of plastic modification technology, polypropylene has been widely used in food packaging, textiles, biomedicine, medical equipment and other fields. These fields must avoid bacterial or fungal infection and the spread of diseases. Therefore, the surface antibacterial modification of polypropylene materials has practical value and significance. [0003] The surface antibacterial modification methods of polypropylene mate...

Claims

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Application Information

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IPC IPC(8): C08F293/00C08F8/44C08G81/02A01P1/00A01P3/00C08L23/12C08L53/00C08L87/00
Inventor 陈汉佳李可峰石旭华
Owner 汕头市康家宝塑料制品实业有限公司
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