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High-performance natural rubber vulcanized rubber of carbon-containing nano-tube, and preparation method thereof

A technology of natural rubber and carbon nanotubes, applied in the direction of dyeing organosilicon compound treatment, fibrous fillers, etc., can solve the problems of low strength, uneven dispersion and low elongation of composite materials, and improve the wear resistance performance. and tear strength, avoid local high temperature, and improve the effect of thermal conductivity

Inactive Publication Date: 2010-09-15
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the above studies, they all use carbon nanotubes alone to reinforce rubber, and the obtained composite materials often have shortcomings such as low strength, low elongation, low viscosity, and poor processability, which cannot meet the performance of rubber products.
In addition, because the carbon nanotubes have not been surface-treated, they are unevenly dispersed in the rubber, so that the structural uniformity of the composite material is poor, and the advantages of the carbon nanotubes in terms of mechanical properties and thermal conductivity cannot be well utilized. Not much

Method used

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  • High-performance natural rubber vulcanized rubber of carbon-containing nano-tube, and preparation method thereof
  • High-performance natural rubber vulcanized rubber of carbon-containing nano-tube, and preparation method thereof

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preparation example Construction

[0022] The preparation method of the high-performance natural rubber vulcanizate containing carbon nanotubes of the present invention comprises the following steps:

[0023] Step 1: Surface treatment of carbon nanotubes: Weigh multi-walled carbon nanotubes MWNTs raw materials, add nitric acid solution, the concentration of nitric acid solution is 2-3mol / L, transfer to the reaction container after ultrasonic dispersion, the ultrasonic dispersion time is 20-60min, heat in an oil bath, transfer to another container after reflux reaction, reflux time is 10-24h, stand still, remove the supernatant, add deionized water to wash, repeat the above cleaning process until the solution is neutral, Then use a microporous membrane for suction filtration, and a 0.22um microporous membrane can be used for suction filtration, and dry it in an oven for standby use at a temperature of 80-100°C.

[0024] Step 2: Surface modification of carbon nanotubes: Weigh the MWNTs treated in step 1 and place...

Embodiment 1

[0031]Preparation of modified carbon nanotube reinforced natural rubber compound. Select carbon nanotubes with a diameter of 20-40nm, acidify with dilute nitric acid, filter, dry at 100°C, and modify with bistriethoxytrisilane tetrasulfide (Si69) to obtain a master rubber. Thailand No. 3 smoke sheet rubber was mixed evenly on the open mill according to the ratio of modified MWNTs and natural rubber at 1:100, and 4 parts of anti-aging agent RD, 1 part of anti-aging agent 4010NA, 5 parts of ZnO, 3 parts of stearic acid, 0.3 1 part of accelerator CZ, 0.3 part of accelerator NOBS, 2 parts of coumarone resin, 3 parts of sulfur, 0.5 part of anti-scorch agent CTP, 43 parts of carbon black, and knead evenly on the open mill. After the refined mixed rubber is parked for 24 hours, the corresponding normal vulcanization time is measured. The compound was vulcanized on a flat vulcanizing machine at 143°C. The tensile strength of the compound is 22.9MPa, the elongation at break is 508%, ...

Embodiment 2

[0033] Repeat the method of Example 1 according to the specified content of each component, but adopt 40 parts of carbon black, 4 parts of modified MWNTs in the formula, the tensile strength of the vulcanizate obtained is 24.7MPa, the elongation at break is 545%, Acron Abrasion value 0.03cm3 / 1.61km, tear strength 98KN.m -1 , the thermal oxygen aging coefficient is 95%, the number of tensile fatigue fractures is 975,000 times, and the thermal conductivity is 0.415.w / m.k

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Abstract

The invention relates to a high-performance natural rubber vulcanized rubber of a carbon-containing nano-tube, which is prepared by a method comprising the steps of: plasticating the carbon-containing nano-tube with a modified surface and natural rubber together to prepare master batch; adding crude rubber, carbon black, zinc oxide, vulcanized agent and accelerating agent into the master batch, processing the obtained mixture by an open mill or an internal mixer, and obtaining natural rubber mixer modified by the carbon-containing nano-tube; and carrying out vulcanizing processing, and obtaining the modified natural rubber vulcanized rubber. By adding the modified carbon-containing nano-tube into the natural rubber material, the invention leads the comprehensive performances such as wear-resisting property, mechanism strength, anti-aging performance, heat-conducting property, anti-fatigue performance and the like of the natural rubber to be remarkably improved, thus improving the using performance of the natural rubber vulcanized rubber, reducing the using quantity of carbon black, and expanding the application scope of the natural rubber vulcanized rubber.

Description

technical field [0001] The invention belongs to the technical field of rubber polymer composite material preparation, in particular to a carbon nanotube-containing modified natural rubber vulcanizate and a preparation method thereof. Background technique [0002] Carbon nanotubes can be regarded as the convolution of two-dimensional graphene sheets, and their ideal structure is a seamless, hollow tube surrounded by hexagonal carbon atom grids. According to the number of tube wall layers, they can be divided into multi-walled carbon nanotubes (MWNTs) and single-walled carbon nanotubes (SWNTs). MWNTs are convoluted by several concentric graphene sheets, and the tube wall spacing is about 0.34nm, which is slightly larger than the layer spacing of graphite (0.335nm). SWNTs are the limit form of carbon nanotubes, with diameters mostly between 1nm and 2nm. [0003] Since Dr. Iijima of Japan's NEC Corporation discovered multi-walled carbon nanotubes (MWNTs) in 1991 when examining...

Claims

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Application Information

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IPC IPC(8): C08L7/00C08K13/06C08K7/00C08K3/04C08K3/06C08K5/47C08K5/18C08K5/378C09C1/44C09C3/12
Inventor 贾红兵祝丽娟秦萧蒋静蒋琪房尔园王经逸
Owner NANJING UNIV OF SCI & TECH
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