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Functionalized GO (graphene oxide) and RTV (room temperature vulcanization) silicone rubber nanocomposite and preparation method thereof

A silicon rubber nano-composite material technology, applied in the field of nano-composite materials, can solve the problems of few examples and achieve high yield, easy industrialization, and simple reaction devices

Inactive Publication Date: 2017-12-22
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In summary, there are very few examples of functionalized modified graphene applied to (reinforced) room temperature vulcanized silicone rubber in the reported literature and patents.

Method used

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  • Functionalized GO (graphene oxide) and RTV (room temperature vulcanization) silicone rubber nanocomposite and preparation method thereof
  • Functionalized GO (graphene oxide) and RTV (room temperature vulcanization) silicone rubber nanocomposite and preparation method thereof
  • Functionalized GO (graphene oxide) and RTV (room temperature vulcanization) silicone rubber nanocomposite and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Weigh 35g of component A and 3.5g of component B of Dow Corning Sylgard 184, stir rapidly at a speed of 1800 r / min for 15 minutes, mix well, pour into a mold, vacuum defoam, and cure at 125 °C for 55 minutes. The performance test results of the obtained pure silicone rubber are shown in Table 1.

Embodiment 2

[0043] (1) Surface modification of graphene oxide

[0044] In a 250 mL round bottom flask, 9.855 g of maleic anhydride, 100 mL of acetone and 23.43 mL of γ-aminopropyltriethoxysilane were added sequentially, and reacted at room temperature for 8 h under nitrogen protection, followed by adding 8.203 g of sodium acetate, 10.364 g acetic anhydride, refluxed for 10 h. After the reaction, the solid-liquid two phases were separated by suction filtration, and the brown-yellow liquid was rotary evaporated for 1 h to obtain a brown-yellow viscous liquid, namely PTESMI.

[0045] Graphene oxide was prepared by the improved Hummers method, then 1.0 g of graphene oxide was weighed and dispersed into 200 mL of absolute ethanol, and a uniform dispersion was obtained by ultrasonic treatment, then 5 mL of ammonia water with a mass fraction of 27% and 6.027 g of PTESMI, quickly transfer the reaction system to an oil bath at 65 °C, stir vigorously, and reflux for 48 h. After the reaction, GO-P...

Embodiment 3

[0051] Graphene oxide surface modification process is the same as example 2. Weigh 57.75 mg of GO-PTESMI-PDMS prepared in step (1) of Example 2 and disperse it in tetrahydrofuran. After ultrasonic treatment for 1 h, a stable graphene dispersion with a content of 1 mg / mL is obtained, and then weigh 35 g of Dow Corning Mix component A of 184 with tetrahydrofuran evenly to obtain a silicone rubber dispersion with a content of 0.5 g / mL, mix the two dispersions, and stir for 40 min at a speed of 23000 r / min in a digital display high-speed dispersing homogenizer, Rotary evaporation under reduced pressure for 1 h to remove the dispersant. Add 3.5 g of component B of Dow Corning 184, stir rapidly at a speed of 1800 r / min for 15 minutes, mix well, pour into a mold, vacuum defoam, and cure at 125 °C for 55 minutes to obtain functionalized graphene oxide Functionalized graphene oxide and room temperature vulcanized silicone rubber nanocomposites with a mass fraction of 0.15%.

[0052] ...

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Abstract

The invention discloses a functionalized GO (graphene oxide) and RTV (room temperature vulcanization) silicone rubber nanocomposite and a preparation method thereof. The method comprises steps as follows: firstly, the surface of GO is grafted with maleimide siloxane, GO-PTESMI is obtained, then double bonds of maleimide on grafting chains in GO-PTESMI are subjected to a hydrosilation reaction with Si-H group terminated PDMS (polydimethylsiloxane) in a solution, and GO (functionalized GO) with surface linked with PDMS grafting chains containing imide groups is prepared; then the functionalized GO is dispersed in a dispersing agent uniformly, and the silicone rubber nanocomposite with different content of functionalized GO is prepared through solution blending. According to the invention, imide bonds and polysiloxane long chains are introduced to the surface of GO, so that interface interaction force and mechanical properties of the nanocompoiste can be improved simultaneously, and the RTV silicone rubber material with capacity of playing excellent performance of GO better is prepared.

Description

technical field [0001] The invention belongs to the field of nanocomposite materials, in particular to a functionalized graphene oxide and room temperature vulcanized silicone rubber nanocomposite material and a preparation method thereof. Background technique [0002] Graphene nanocomposites are one of the fastest research and application fields of graphene. Introducing graphene into silicone rubber is expected to endow such composite materials with excellent mechanical, thermal, electrical, magnetic and other physical and chemical properties, but graphite The inertness of the reaction and the characteristics of easy agglomeration and difficult dispersion of alkene limit its application in silicone rubber materials. [0003] Chinese invention patent CN106519699A uses hydrazine hydrate to reduce graphene oxide, adds graphene to room temperature vulcanized silicone rubber, and obtains a composite material with better performance than pure silicone rubber. Chinese invention p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/04C08K9/06C08K3/04
CPCC08K3/04C08K9/06C08L2201/08C08L83/04
Inventor 关怀民王君利童跃进刘杭忠郑嘉敏黄颖芬
Owner FUJIAN NORMAL UNIV
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