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Natural rubber composite material with modified crystal whiskers and preparation method thereof

A technology for natural rubber and composite materials, applied in the field of natural rubber composite materials and their preparation, can solve the problems of low tensile modulus, low tensile properties and wear resistance, etc.

Inactive Publication Date: 2010-09-08
SHANGHAI UNIV OF ENG SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the low tensile modulus of this material, there are defects of low tensile properties and wear resistance, which cannot meet the needs of the rubber industry, especially in the application of high-performance fields.

Method used

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  • Natural rubber composite material with modified crystal whiskers and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Surface modification of whiskers

[0036] Mix 190ml of absolute ethanol and 20ml of deionized water to form an aqueous ethanol solution, add 1g of γ-aminopropyltriethoxysilane, place in an ultrasonic processor, and pretreat at 30°C for 10min. Add 40 grams of zinc oxide whiskers, use glacial acetic acid to control the pH of the system to 5, and then ultrasonically treat the mixture at 50°C for 20 minutes, pour it into a watch glass, and dry it in vacuum to obtain modified zinc oxide whiskers.

[0037] Zinc oxide whiskers are T-ZnO products produced by Chengdu Jiaotong University Jingyu Technology Co., Ltd. The average length of the needles is 30 μm, the average diameter of the roots is 4 μm, and the appearance is loose white powder.

[0038] Preparation of modified whisker and natural rubber composites

[0039] 1) Mastication: Put 100 parts of natural rubber on the plate with a roller distance of 0.6 mm, then turn the raw rubber 90 degrees before adding, and repeat the ...

Embodiment 2

[0045] Surface modification of whiskers

[0046] Mix 200ml of absolute ethanol and 55ml of deionized water to make an aqueous ethanol solution, add 2 grams of bis(3-triethoxysilylpropyl)tetrasulfide, place it in an ultrasonic processor, and pretreat at 40°C for 8min . Add 30 grams of calcium sulfate whiskers, use glacial acetic acid to control the pH of the system to 4, ultrasonically treat at 60°C for 15 minutes, pour into a watch glass, and dry in vacuum to obtain modified calcium sulfate whiskers.

[0047] Calcium sulfate whisker is a product of Luoyang Liangdong Africa Metal Material Technology Development Co., Ltd., with an average diameter of 4.5 μm and an average length of 125 μm. It is a whisker-like single crystal with a perfect internal structure.

[0048] Preparation of modified whisker and natural rubber composites

[0049] 1) Mastication: Put 100 parts of natural rubber on the plate with a roll distance of 0.5 mm, then turn the raw rubber 90 degrees before addin...

Embodiment 3

[0055] Surface modification of whiskers

[0056] Mix 250ml of absolute ethanol and 70ml of deionized water to form an aqueous ethanol solution, add 5 grams of γ-glycidyloxypropyltrimethoxysilane, place in an ultrasonic processor, and pretreat at 30°C for 10min. Add 30 grams of magnesium sulfate whiskers, use glacial acetic acid to control the pH value of the system to 6, ultrasonically treat at 50°C for 20 minutes, pour into a watch glass, and vacuum dry to obtain modified magnesium sulfate whiskers.

[0057] The magnesium sulfate whisker is a product of Yingkou Kangru Chemical Co., Ltd. with the brand name WS-1S. It is a white needle-like single crystal fiber with an average diameter of 0.75 μm and an average length of 50 μm.

[0058] Preparation of modified whisker and natural rubber composites

[0059] 1) Mastication: Thin pass 100 parts of natural rubber on the plate at a roller distance of 0.8 mm, then turn the raw rubber 90 degrees before adding, repeat the thin pass 9 ...

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Abstract

The invention discloses a natural rubber composite material with modified crystal whiskers and a preparation method thereof. The preparation method comprises the following steps: (1) plasticating natural rubber in an open mill to obtain plasticated rubber; (2) mixing the plasticated rubber: when the plasticated rubber wraps a roller, adding stearic acid, zinc oxide, accelerant, modified whiskers and brimstone for mixing, thereby obtaining a sizing material; and (3) and heating the sizing material in a vulcanizing press for vulcanizing, thereby obtaining the natural rubber composite material with the modified whiskers. The invention carries out effective surface modification on the whiskers by ultrasonic treatment and adds the modified whiskers to the rubber to obtain the natural rubber composite material. The mechanical properties and wear-resisting property of the natural rubber composite material are obviously enhanced; and the invention has the advantages of simple technological conditions for modification, low cost and wide application prospects.

Description

technical field [0001] The invention relates to a natural rubber composite material containing modified whiskers and a preparation method thereof. Background technique [0002] Natural rubber is the general-purpose rubber with the best comprehensive performance, mainly used in the tire industry. With the development of society and the development of science and technology, the rubber industry has also put forward new requirements for the mechanical properties of rubber, which requires us to carry out innovative research on the basis of tradition and develop high-performance rubber composite materials that can meet the needs of industry development. . [0003] Polymer Materials Science and Engineering, 2003, 19(6): 119-121. Reported "Preparation of Nano Zinc Oxide Modified Rubber Powder / Natural Rubber Composite Material", which uses surfactants to modify nano Zinc Oxide, and The tensile properties and wear resistance of natural rubber composites filled with modified rubber ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L7/00C08K13/06C08K9/06C08K7/10C08K7/08C08K5/09C08K3/22C08K3/06C08J3/24
Inventor 陈月辉杨淼
Owner SHANGHAI UNIV OF ENG SCI
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