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A kind of preparation method of antifouling, sterilizing and renewable long-acting antibacterial mixed polymer brush

A mixed polymer, long-acting technology, applied in botany equipment and methods, biocides, plant growth regulators, etc., can solve problems such as irritation, accumulation of dead bacteria, and shortened service life of antibacterial surfaces

Active Publication Date: 2020-10-30
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, fungicides generally have a strong bacteria-absorbing effect, which actively attracts and kills bacteria, causing a large number of dead bacteria to accumulate on the antibacterial surface in a short period of time, which requires frequent stimulus responses to clean and regenerate the surface. This will greatly shorten the service life of the antibacterial surface, thereby affecting the antibacterial effect

Method used

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  • A kind of preparation method of antifouling, sterilizing and renewable long-acting antibacterial mixed polymer brush
  • A kind of preparation method of antifouling, sterilizing and renewable long-acting antibacterial mixed polymer brush
  • A kind of preparation method of antifouling, sterilizing and renewable long-acting antibacterial mixed polymer brush

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Take a silicon wafer with a size of 1cm*2cm and place it in freshly prepared concentrated H 2 SO 4 、H 2 o 2 In a solution with a volume ratio of 3:1, react in an oil bath at 120° C. for 30 minutes to obtain a hydroxylated silicon wafer surface. Dip the pretreated silicon wafer into ATRP initiator 3-(2-bromoisobutanolamino)propyl(trimethoxy)silane and PIMP initiator (4-trimethylsiloxane)-phenyl-N , In the chloroform solution of allyl N-diethyldithiocarbamate, the ratio of the two initiators is 1:1, and the reaction is carried out at room temperature for 12 hours. Chloroform, ethanol, and deionized water were ultrasonically cleaned in sequence to obtain a silicon wafer on the grafted surface of the mixed initiator.

[0052] The silicon substrate after the above treatment was placed in a reaction test tube, and 0.30g DVBAPS, 1.25mL TFE, 1.2mL deionized water, 6.5μL Me 6 TREN, 10mg CuBr, after several times of vacuum pumping-through N 2 After the cycle, the system was...

Embodiment 2

[0058] Take a silicon wafer with a size of 1cm*2cm and place it in freshly prepared concentrated H 2 SO 4 、H 2 o 2 In a solution with a volume ratio of 3:1, react in an oil bath at 120° C. for 30 minutes to obtain a hydroxylated silicon wafer surface. Dip the pretreated silicon wafer into ATRP initiator 3-(2-bromoisobutanolamino)propyl(trimethoxy)silane and PIMP initiator (4-trimethylsiloxane)-phenyl-N , In the chloroform solution of allyl N-diethyldithiocarbamate, the ratio of the two initiators is 1:1, and the reaction is carried out at room temperature for 12 hours. Chloroform, ethanol, and deionized water were ultrasonically cleaned in sequence to obtain a silicon wafer on the grafted surface of the mixed initiator.

[0059] The silicon substrate after the above treatment was placed in a reaction test tube, and 0.50 g of SVBP, 1.8 mL of TFE, 1 mL of deionized water, and 6.2 μL of Me 6 TREN, 8mg CuCl, after several vacuum pumping-through N 2 After the cycle, the syste...

Embodiment 3

[0064] Take a silicon wafer with a size of 1cm*2cm and place it in freshly prepared concentrated H 2 SO 4 、H 2 o 2 In a solution with a volume ratio of 3:1, react in an oil bath at 120° C. for 30 minutes to obtain a hydroxylated silicon wafer surface. Dip the pretreated silicon wafer into ATRP initiator 3-(2-bromoisobutanolamino)propyl(trimethoxy)silane and PIMP initiator (4-trimethylsiloxane)-phenyl-N , In the chloroform solution of allyl N-diethyldithiocarbamate, the ratio of the two initiators is 1:1, and the reaction is carried out at room temperature for 12 hours. Chloroform, ethanol, and deionized water were ultrasonically cleaned in sequence to obtain a silicon wafer on the grafted surface of the mixed initiator.

[0065] The silicon substrate after the above treatment was placed in a reaction test tube, and 0.50g VBIPS, 1.34mL TFE, 2.5mL deionized water, 9mg CuBr, 5.8μL Me 6 TREN, after multiple vacuum pumping - through N 2 After the cycle, the system was reacted...

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Abstract

The invention discloses a preparation method of a stain-repellent bactericidal reproducible long-acting antibacterial mixed polymer brush. The preparation method includes the steps that a silicon wafer is subjected to ultrasonic cleaning and hydroxylation treatment and then is put in a chloroform solution prepared by an SI-ATRP initiator and an SI-PIMP initiator, and a silicon wafer with a mixed initiator grafted surface is obtained; the silicon wafer, a salt response monomer, a solvent, a ligand and copper salt are mixed for ATRP reaction, ultrasonic cleaning is performed after the reaction,and a single-layer polymer brush is introduced to the surface; the silicon wafer, a stain-repellent layer hydrophilic monomer and a solvent are mixed, then SI-PIMP reaction is performed under UV light, and after the reaction, ultrasonic cleaning is performed to obtain a mixed polymer brush silicon wafer; TCS oxalyl chloride is put in a solvent to obtain a preproduct through reaction; the mixed polymer brush is put in the solution of the preproduct, and after the grafting reaction, ultrasonic cleaning is performed to obtain the long-acting antibacterial mixed polymer brush. The polymer brush prepared by the preparation method has the advantages of being repellent to stains, reducing the adsorption of bacteria, performing sterilization and achieving surface regeneration by releasing dead bacteria in response to salt, and has a long-acting antibacterial effect.

Description

technical field [0001] The invention relates to the technical field of preparation of polymer brushes, in particular to a preparation method of an antifouling, sterilizing and reproducible long-acting antibacterial mixed polymer brush. Background technique [0002] Polymer brush refers to a special polymer structure formed by fixing polymer molecular chains with a high density and a certain length on a specific substrate surface or interface. Generally speaking, the chains of the monomers constituting the polymer brushes are much longer than the chains grafted on the surface of the general substrate. At high densities, the polymeric chains extend vertically from the substrate surface, with each polymeric chain acting like a hair on a brush. [0003] When enough polymer molecules are grafted on the colloidal particles, since the polymers have good compatibility in the solution where the colloidal particles are located, the polymer brushes formed on the colloidal particles th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F8/32C08F273/00C08F128/02C08F220/20C08F220/58C08F2/48A01N31/16A01N25/10A01P1/00
CPCA01N25/10A01N31/16C08F2/48C08F8/32C08F128/02C08F273/00C08F220/20C08F220/58
Inventor 杨晋涛傅燕红汪扬钟明强陈枫范萍
Owner ZHEJIANG UNIV OF TECH