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Method for preparing rice hull ash-natural rubber composite material

A technology of natural rubber and composite materials, which is applied in the field of preparation of natural rubber composite materials, and can solve problems such as ineffective effects

Inactive Publication Date: 2009-04-29
AGRI PRODS PROCESSING RES INST CHINESE ACAD OF TROPICAL AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to improve the physical properties of RHA-filled NR vulcanizates, bis-(γ-triethoxysilylpropyl)-tetrasulfide (coupling agent Si69) was used to improve the physical properties of vulcanizates, but the effect was not obvious

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0019] Add 1 to 10 parts of rice husk ash with an average particle size of 60 nm and a mass fraction of silica of 0.85 in 100 parts of deionized water and soak for 1 day, then add 2 to 5 parts of γ-mercaptopropyltrimethoxysilane and 0.3 to 0.5 parts of sodium dodecylbenzenesulfonate, ultrasonically dispersed for 30 minutes, then add 1 to 10 parts of epoxidized natural rubber latex with an epoxidation degree of 20 to 50% and a total solid content of 20 to 25% based on dry rubber , continue to adopt ultrasonic dispersion for 30 minutes to prepare rice husk ash dispersion; at the same time, 0.3 to 0.5 parts of fatty alcohol polyoxyethylene ether is used to stabilize 100 parts of concentrated natural rubber latex with a total solid content of 60% based on dry glue, and keep stirring Mix the above-mentioned rice husk ash dispersion evenly into the stable concentrated natural rubber latex under certain conditions to obtain the rice husk ash-natural rubber composite material in the la...

Embodiment 1

[0025]In 100 parts of deionized water, add 6 parts of black rice husk ash with an average particle size of 60 nm and a mass fraction of silica of 0.85 and soak for 1 day, then add 4 parts of γ-mercaptopropyltrimethoxysilane and 0.5 part of dodecane Sodium phenyl sulfonate, ultrasonically dispersed for 30 minutes, then added 10 parts of epoxidized natural rubber latex with an epoxidation degree of 25% based on dry rubber and a total solid content of 25%, ultrasonically dispersed for 30 minutes, and prepared rice husk Ash dispersion: get 100 parts of concentrated natural rubber latex with a total solid content of 60% based on dry rubber, add 0.5 part of fatty alcohol polyoxyethylene ether, and then add the above-mentioned rice husk ash dispersion under stirring. After stirring evenly, the rice husk ash-natural rubber composite material in latex state is obtained. Add 1.2 parts of sulfur, 0.7 parts of zinc oxide, 0.7 parts of zinc diethyldithiocarbamate (ZDC), 0.5 parts of zinc e...

Embodiment 2

[0027] In 100 parts of deionized water, add 6 parts of white rice husk ash with an average particle size of 60 nm and a mass fraction of silica of 0.85 and soak for 1 day, then add 4 parts of γ-mercaptopropyltrimethoxysilane and 0.5 part of dodecane Sodium phenyl sulfonate, ultrasonically dispersed for 30 minutes, then added 10 parts of epoxidized natural rubber latex with an epoxidation degree of 25% based on dry rubber and a total solid content of 25%, ultrasonically dispersed for 30 minutes, and prepared rice husk Ash dispersion: get 100 parts of concentrated natural rubber latex with a total solid content of 60% based on dry rubber, add 0.5 part of fatty alcohol polyoxyethylene ether, and then add the above-mentioned rice husk ash dispersion under stirring. After being evenly stirred, formic acid is used for coagulation, tabletting, washing and drying to make a dry gelatinous rice husk ash-natural rubber composite material. Add 3.5 parts of sulfur, 5.0 parts of zinc oxide,...

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Abstract

The invention provides a method for preparing a rice husk ash-natural rubber composite material. The method is characterized in that epoxidized natural rubber is taken as compatilizer of rice husk ash and natural rubber; the excellent compatibility of the epoxidized natural rubber and the natural rubber, as well as the chemical reaction of the epoxidized natural rubber and the rice husk ash are utilized to improve the dispersion effect of the rice husk ash in the natural rubber, and strengthen the interaction between the rice husk ash and the natural rubber, so as to prepare the rice husk ash-natural rubber composite material with high performance; the tensile strength of a vulcanized rubber sheet of the composite material is between 19 and 23 MPa; the tensile failure elongation of the vulcanized rubber sheet is between 750 and 900 percent; and the 300-percent stress at definite elongation of the vulcanized rubber sheet is between 4.0 and 6.0 MPa.

Description

1. Technical field [0001] The invention relates to a preparation method of a natural rubber composite material, in particular to a preparation method of a rice husk ash-natural rubber composite material. 2. Background technology [0002] Almost all rubbers must add a certain amount of fillers during processing to prepare useful rubber products. Fillers are traditionally divided into two categories according to their influence on the properties of raw rubber: one is active filler or reinforcing agent, which can improve the wear resistance, modulus, Tensile strength, tear resistance and fatigue resistance; the other type is inactive fillers or inert fillers, which have no reinforcing effect when added to raw rubber, but can basically not damage the performance of rubber Next, reduce costs and improve processing technology. At present, the fillers widely used in the rubber industry mainly include carbon black, silica, fiber, clay, etc. Among them, carbon black, silica, fiber,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L7/00C08L15/00C08K9/06C08J3/215
Inventor 曾宗强余和平彭政黄茂芳
Owner AGRI PRODS PROCESSING RES INST CHINESE ACAD OF TROPICAL AGRI SCI
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