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High performance XNBR vulcanized rubber containing graphene oxide and its preparation method

A vulcanized rubber and high-performance technology, which is applied in the field of preparation of rubber-like polymer composite materials, can solve the problems of not mentioning the application effect of carboxyl nitrile butadiene rubber, no implementation effect, and more reaction steps, etc., so as to improve mechanical strength, The effect of improving the thermal conductivity and improving the utilization rate

Inactive Publication Date: 2012-11-21
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent, application number 201010191018.6), Wu Jinrong improved on the basis of Xia Hesheng and other methods, blended the aqueous solution of graphene oxide with latex, mixed evenly, broke the emulsion, formed graphene oxide / polymer suspension, and added reducing agent Carry out in-situ reduction of graphene oxide, and then filter and dry to obtain graphene / polymer composite material (Wu Jinrong, Huang Guangsu, Li Hui, Weng Gengsheng, Wu Siduo, Liu Yufeng, Chinese patent, application number 201110057404.0). All of the above technologies Graphene oxide needs to be reduced to graphene, the reaction steps increase and the cost increases
The 2011 National Polymer Academic Papers Report, P1-3), studied the effect of graphene oxide on the reinforcing properties of natural rubber, and found that after adding graphene oxide, the mechanical properties of natural rubber can be increased by up to 40% compared with no addition. In this abstract, only the impact on performance is mentioned, but how to prepare, its performance parameters, etc. are not explained
The above-mentioned methods do not mention the application effect in carboxylated nitrile rubber. During the experiment, the above-mentioned methods were used in carboxylated nitrile rubber, but no good implementation effect was obtained.

Method used

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  • High performance XNBR vulcanized rubber containing graphene oxide and its preparation method
  • High performance XNBR vulcanized rubber containing graphene oxide and its preparation method
  • High performance XNBR vulcanized rubber containing graphene oxide and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Weigh 10g of graphene oxide, 50g of sodium lauryl sulfate, and dissolve them in 1L of deionized water. The ultrasonic power is 125W, the temperature is 20°C, ultrasonication is 6h, and the centrifugate in the upper layer is centrifuged at a speed of 6000 rpm. Take the upper liquid to obtain a suspension of graphene oxide with a single-sheet structure. The thickness of graphene oxide see figure 2 .

[0022] Weigh the corresponding mass of single-layer graphene oxide suspension, ultrasonic 20min, weigh 30gXNBR latex, under magnetic stirring, add the graphene oxide solution (the net content of graphene oxide is 0.3g) into the latex, ultrasonic 1h, Add anti-aging agent WL0.15 gram. Adjust the pH value of the latex to about 2, add the latex to the KCl solution for flocculation, then repeatedly wash the flocculated latex with 100° C. deionized water, and dry it at 110° C. for 2 hours. Weigh 10g of graphene / XNBR (masterbatch), add 0.3g of vulcanizing agent DCP, and mix on ...

Embodiment 2

[0024] Repeat the method of Example 1 according to the specified content of each component, but adopt 0.9 gram of graphene oxide in the formula, 0.3 gram of antioxidant WL, 0.3 gram of DTBP, the tensile strength of the vulcanized rubber obtained is 15.61MPa, and the elongation at break The rate is 177%, the 100% modulus is 7.74MPa, the Shore hardness is 77, the maximum thermal decomposition temperature is 473.°C, the thermal conductivity is 0.233W×mK-1, and the thermal diffusivity is 0.096mm 2 ·s -1 . Oil absorption (ASTM1 # Oil) after treatment, the tensile strength is 10.4MPa, the elongation at break is 176%, and the Shore hardness is 73.

Embodiment 3

[0026] Repeat the method of Example 1 according to the specified content of each component, but adopt 1.2 grams of graphene oxide in the formula, 0.15 grams of antioxidant 4010NA, 0.2 grams of DCP, the tensile strength of the vulcanized rubber obtained is 12.9MPa, and the elongation at break The rate is 191%, the 100% modulus is 5.0MPa, the Shore hardness is 77, the maximum thermal decomposition temperature is 473.°C, the thermal conductivity is 0.270W×mK-1, and the thermal diffusivity is 0.096mm 2 ·s -1 . Oil absorption (ASTM1 # ) After treatment, the tensile strength is 12.1MPa, the elongation at break is 191%, and the Shore hardness is 75.

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Abstract

The invention discloses a high performance XNBR rubber containing graphene oxide and its preparation method. The preparation method comprises the following steps: adding graphite oxide into a surface modifier for ultrasonic stripping; carrying out centrifugal separation so as to obtain surface modified single-layer graphene oxide; mixing the single-layer graphene oxide with XNBR rubber latex; then successively adding an anti-aging agent and a flocculant and preparing a rubber mixture by using a co-coagulation method; and adding a vulcanizing agent for vulcanization so as to obtain graphene oxide-containing XNBR vulcanized rubber with high mechanical properties and high thermal conductivity. According to the invention, since the surface modifier is added in the process of stripping, stability and surface tension of graphene oxide suspension are changed, graphene oxide and the latex are allowed be uniformly mixed, and the degree of homodisperse of graphene oxide in a polymer is improved, and therefore, the purpose of improving mechanical strength of XNBR is achieved.

Description

technical field [0001] The invention belongs to the technical field of preparation of rubber polymer composite materials, in particular to a carboxylated nitrile rubber (XNBR) vulcanized rubber containing single-layer structure graphene oxide with high mechanical properties and high thermal conductivity and a preparation method thereof. Background technique [0002] Graphene is made of sp 2 The two-dimensional (2D) periodic honeycomb lattice structure composed of hybridized carbon atoms has unique mechanical properties (Young's modulus and ultimate strength are as high as 1TPa and 130GPa, respectively), electrical conductivity (conductivity is as high as 10 6 S / m), thermal conductivity (thermal conductivity up to 5000W / mK), but the preparation of graphene is difficult. [0003] Graphene oxide (Graphene Oxide) is easy to prepare. It is a two-dimensional sheet material obtained by oxidizing flake graphite through a strong oxidant, introducing polar groups on the surface of th...

Claims

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Application Information

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IPC IPC(8): C08L13/00C08K9/04C08K3/04C08J3/24
Inventor 贾红兵王经逸汤颖颖房尔园陈杰熊欣李锋
Owner NANJING UNIV OF SCI & TECH
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