Preparation method of silicone-modified DNRL grafted copolymer

A technology of graft copolymer and organosilicon, which is applied in the field of preparation of organosilicon modified DNRL graft copolymer, can solve the problem of natural rubber tensile properties, heat resistance, low hydrophobicity, antibacterial properties, and low adhesion In order to improve the antibacterial performance and biocompatibility, the process is green and environmentally friendly, and the application prospect is wide.

Inactive Publication Date: 2019-07-05
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in the field of graft polymerization of natural rubber latex, a small amount of organosilicon monomer has not been grafted in the later stage of polymerization with the assistance of styrene. The inventors have found that this makes the tensile properties, heat resistance, and and low hydrophobicity; and, as recognized by the International Union of Immunological Societies (IUIS), the NRL membrane shows low adhesion, and the human body may cause allergies due to the presence of 14 proteins (Hev b1-14), which In terms of biomedical applications, the antibacterial properties of rubber medical devices are not optimistic

Method used

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  • Preparation method of silicone-modified DNRL grafted copolymer
  • Preparation method of silicone-modified DNRL grafted copolymer
  • Preparation method of silicone-modified DNRL grafted copolymer

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preparation example Construction

[0040] The present invention also provides a kind of preparation method of organosilicon modified DNRL graft copolymer, comprising the following steps:

[0041] (1) Mix 10-20 parts of hard monomer, 10-30 parts of deionized water, and 0.3-0.8 parts of emulsifier, and stir for 30 minutes under the action of 20000-50000 Hz ultrasonic waves to obtain pre-emulsion A.

[0042] (2) Dissolving 0.05-0.3 parts of initiator in 10-30 parts of deionized water to obtain initiator aqueous solution B.

[0043] (3) Add 40-80 parts of deproteinized natural rubber latex and 1 / 3 pre-emulsion A to a four-necked flask equipped with a mechanical stirring paddle and a reflux condenser, put the flask into an oil bath, and heat to 40-60 ℃, continuously feed nitrogen into the bottle, and stir the mixture at a rate of 200-300r / min. After 30 minutes, raise the temperature of the oil bath to 60-90℃, and drop it into the four-necked flask through a constant pressure dropping funnel. Add 1 / 3 of the initiato...

Embodiment 1

[0048] A method for preparing a silicone-modified DNRL graft copolymer, comprising the following raw materials in parts by weight: 50 parts of deproteinized natural rubber latex (DNRL, w=30%), 10 parts of styrene, vinyltrimethoxysilane 1 part, 12 parts of deionized water, 0.1 part of initiator, 0.3 part of emulsifier;

[0049] The deproteinized natural rubber latex (DNRL, w=30%) is formulated from the following raw materials and steps: 0.2 parts of urea and 1.5 parts of sodium dodecyl sulfate (SDS) are dropped into 200 parts of fresh natural rubber latex (NRL , w=30%), and stirred for 30 minutes, incubated at 30 ° C for 1 hour, and then 10 4 The deproteinization of natural rubber latex was performed at a centrifugal rate of rpm, and the centrifuged cream part was redispersed in deionized water to prepare deproteinized natural rubber latex (DNRL, w=30%).

[0050] A kind of preparation method of organosilicon modified DNRL graft copolymer of the present invention, as following ...

Embodiment 2

[0058] A method for preparing a silicone-modified DNRL graft copolymer, which consists of the following raw materials in parts by weight: 55 parts of deproteinized natural rubber latex (DNRL, w=30%), 12 parts of styrene, γ-methacryloyl 2 parts of oxypropyltrimethoxysilane, 15 parts of deionized water, 0.11 parts of initiator, 0.3 parts of emulsifier;

[0059] The deproteinized natural rubber latex (DNRL, w=30%) is formulated from the following raw materials and steps: 0.2 parts of urea and 1.5 parts of sodium dodecyl sulfate (SDS) are dropped into 200 parts of fresh natural rubber latex (NRL , w=30%), and stirred for 30 minutes, incubated at 30 ° C for 1 hour, and then 10 4 The deproteinization of natural rubber latex was performed at a centrifugal rate of rpm, and the centrifuged cream part was redispersed in deionized water to prepare deproteinized natural rubber latex (DNRL, w=30%).

[0060] A kind of preparation method of organosilicon modified DNRL graft copolymer of the...

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Abstract

The invention relates to a preparation method of a silicone-modified DNRL (deproteinized natural rubber latex) grafted copolymer. Raw materials of the silicone-modified DNRL grafted copolymer comprise, by weight, 40-80 parts of DNRL (w = 30%), 10-20 parts of a hard monomer, 1-5 parts of a silicone monomer, 10-30 parts of deionized water, 0.05-0.2 part of an initiator and 0.3-0.8 part of an emulsifier. NRL is deproteinized, and then interacts with lipids to improve the antibacterial property and biocompatibility of the natural rubber, so the DNRL can be applied in the field of medical treatmentand public health. The silicone monomer is added in the later stage of grafting of styrene with the DNRL, so the tensile property, the weather resistance and the hydrophobic property of the DNRL grafted copolymer are improved. The method adopting a semi-continuous seed emulsion polymerization process has the advantages of increase of the grafting rate and the conversion rate of the DNRL, green and environmentally-friendly process and broad application prospect.

Description

technical field [0001] The invention belongs to the field of macromolecule chemical industry, and in particular relates to a preparation method of organosilicon-modified DNRL graft copolymer. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] Natural rubber latex (NRL) is defined as cis-1,4-polyisoprene units dispersed in an aqueous medium. It is derived from the Hevea brasiliensis tree and has interesting properties including biocompatibility, high mechanical resistance, ability to form membranes, and is a natural stimulant of angiogenesis. [0004] Silicone combines the properties of inorganic materials and organic materials, and has basic properties such as low surface t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F253/00C08F230/08C08F212/08C08F220/18C08F2/26C08F2/30C08C1/04
CPCC08F253/00C08F2/26C08F2/30C08C1/04C08F220/18
Inventor 刘月涛朱传聪延晨政哲高传慧武玉民
Owner QINGDAO UNIV OF SCI & TECH
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