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Carboxyl nitrile rubber/carboxyl starch composite material as well as preparation method and application thereof

A technology of carboxylated nitrile rubber and carboxylated starch, which is applied in the field of carboxylated nitrile rubber/carboxylated starch composite material and its preparation, can solve the problems of difficult recycling and reprocessing, non-degradable, etc., and achieve good repeatable thermoplastic processing performance, The effect of low cost, green environmental protection and biocompatibility

Active Publication Date: 2020-09-22
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Curing and accelerators such as sulfur and dicumyl peroxide, etc., can improve the tensile strength of carboxylated nitrile rubber (XNBR), but it also causes the disadvantages of being difficult to recycle and reprocessing, resulting in a large amount of non-degradable rubber preparation

Method used

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  • Carboxyl nitrile rubber/carboxyl starch composite material as well as preparation method and application thereof
  • Carboxyl nitrile rubber/carboxyl starch composite material as well as preparation method and application thereof
  • Carboxyl nitrile rubber/carboxyl starch composite material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Dissolve 500 g of starch in 2500 g of deionized water, then mix uniformly under mechanical stirring at 1000 r / min, put the mixed starch solution in a microwave oven for gelatinization, and cool to room temperature. Add 352g of 30% hydrogen peroxide solution and 200mg of anhydrous copper sulfate as a catalyst. After 24 hours of constant temperature reaction at 35℃, the resulting carboxy starch (OST) syrup is placed in a blast oven at 60℃. Carboxy starch (OST) is dried to constant weight and crushed to 200 mesh powder for later use. Weigh 50g of carboxyl starch (OST) powder, add 300g of water, pour into 2000g of carboxyl nitrile butadiene rubber (XNBR) emulsion with a solid content of 40%, then mechanically stir (1000r / min) for 40 minutes, then pour into stainless steel iron Place the pan in a 60°C blast oven and bake for 2 hours. Then, the above-mentioned mixture is processed in an open mill, and 12g of zinc oxide with a particle diameter of 30nm is added at the same tim...

Embodiment 2

[0036] Dissolve 500 g of starch in 2500 g of deionized water, then mix uniformly under mechanical stirring at 1000 r / min, put the mixed starch solution in a microwave oven for gelatinization, and cool to room temperature. Add 176g of 30% hydrogen peroxide solution and 150mg of anhydrous copper sulfate as a catalyst. After 36 hours of constant temperature reaction at 35℃, the carboxyl starch (OST) paste is placed in a 60℃ blast oven. Carboxy starch (OST) is dried to constant weight and crushed to 200 mesh powder for later use. Weigh 35g of carboxyl starch (OST) powder, add 200g of water, pour into 350g carboxyl nitrile butadiene rubber (XNBR) emulsion with a solid content of 40%, then mechanically stir (1000r / min) for 50 minutes, then pour into stainless steel iron Put the pan in a 65°C blast oven and bake it for 2.5 hours. Then the above-mentioned mixture is processed in an open mill, and 14g of zinc oxide with a particle diameter of 40nm is added at the same time. After 45 mi...

Embodiment 3

[0038] Dissolve 500 g of starch in 2200 g of deionized water, then mix uniformly under mechanical stirring at 1000 r / min, put the mixed starch solution in a microwave oven for gelatinization, and cool to room temperature. Add 528g of 30% hydrogen peroxide solution and 350mg of anhydrous copper sulfate as a catalyst. After reacting at 35℃ for 40 hours, put the carboxyl starch (OST) paste in a 60℃ blast oven. Carboxy starch (OST) is dried to constant weight and crushed to 200 mesh powder for later use. Weigh 30g carboxyl starch (OST) powder powder, add 150g of water, pour into 342g carboxyl nitrile butadiene rubber (XNBR) emulsion with a solid content of 40%, then mechanically stir (1000r / min) for 45 minutes, then pour into stainless steel Put the iron pan in a 65°C blast oven and bake it for 2 hours. Then, the above mixture was processed in an open mill and 10g of zinc oxide with a particle diameter of 30nm was added. After 40 minutes, the obtained sample was pressed in a flat ...

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Abstract

The invention discloses a carboxyl nitrile rubber / carboxyl starch composite material as well as a preparation method and application thereof. The preparation method comprises the steps: preparing carboxyl starch by catalyzing and oxidizing starch with hydrogen peroxide and anhydrous cupric sulfate, adding a carboxyl nitrile rubber emulsion, stirring to obtain a pre-mixture, carrying out open milling on the pre-mixture, adding zinc oxide, and carrying out hot-pressing reaction molding to obtain the carboxyl nitrile rubber / carboxyl starch composite material. The preparation method provided by the invention is simple and convenient in processing process and macro preparation process, green and environment-friendly, and has the advantages of sustainable development and environmental friendliness. The carboxylated nitrile rubber / carboxylated starch composite material has the advantages of high elongation, high mechanical properties and repeatable thermoplastic processing. The invention alsodiscloses an application of the carboxylated nitrile rubber / carboxylated starch composite material in the fields of medical protection and food packaging.

Description

Technical field [0001] The invention belongs to the technical field of modified carboxyl nitrile rubber, and specifically relates to a carboxyl nitrile rubber / carboxyl starch composite material and a preparation method and application thereof. Background technique [0002] Carboxyl nitrile rubber (XNBR) is a new type of synthetic rubber prepared by introducing a certain proportion of acrylic acid and its derivative monomers into the molecular chain of nitrile rubber (NBR) during free radical polymerization. The introduction of carboxyl groups into nitrile rubber can improve its tensile strength, tear strength, hardness, abrasion resistance, adhesion and ozone aging resistance, especially its tensile strength at high temperatures. In addition, the introduction of carboxyl groups can also increase the polarity of nitrile rubber molecules, increase the compatibility with polyvinyl chloride, phenolic resins, etc., and can obtain high hardness, wear resistance, oil resistance, chemica...

Claims

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Application Information

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IPC IPC(8): C08L13/00C08L3/10C08K3/22
CPCC08K2003/2296C08K2201/003C08L13/00C08L2201/06C08L2201/08C08L3/10C08K3/22
Inventor 张水洞杨家辉陈玉坤
Owner SOUTH CHINA UNIV OF TECH
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