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A kind of preparation method of silane functionalized graphene airgel material

An aerogel and functionalization technology, applied in the field of aerogel, can solve the problem of the control and preparation of three-dimensional graphene pore size and surface properties, and the lack of effective control and amplification of the interlayer interaction mode and its interface properties Preparation and application prospects and other issues, to achieve the effect of non-toxic and pollution-free preparation process, improved mechanical properties, simple and safe preparation method

Active Publication Date: 2018-08-07
HANGZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that various methods and technologies for preparing 3D graphene have been established; however, the preparation process of most three-dimensional graphene structures is relatively complicated, such as the CVD method that requires high temperature (such as 1000°C) growth and etching of metal Ni foam, etc., self-assembly The method requires high-concentration GO aqueous solution (even up to 40.0 mg / mL) and high-temperature treatment (mostly >400°C, even >2000°C). These harsh preparation conditions greatly limit the scale-up preparation and application prospects of this type of three-dimensional graphene materials.
More importantly, there are still few studies on the regulation and preparation of 3D graphene pore size and surface properties, and there is still a lack of simple preparation technology to realize the control of 3D graphene structure size, interlamellar interaction mode and interface properties, etc. effective control of

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  • A kind of preparation method of silane functionalized graphene airgel material
  • A kind of preparation method of silane functionalized graphene airgel material
  • A kind of preparation method of silane functionalized graphene airgel material

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Disperse GO evenly in deionized water, prepare 10 mL of 1 mg / mL GO aqueous solution, add ammonia water, adjust pH=12, stir and mix at room temperature for 10 min, then add 10 mg of γ-glycidyl etheroxypropyl trimethoxysilane KH560 , and stirred evenly for 10 minutes, then heated up to 60°C and kept for 24 hours to prepare functionalized graphene hydrogel. The hydrogel was added to ethanol and dialyzed for 24 hours, and then freeze-dried at -50°C with a vacuum of 10 Pa for 48 hours to prepare functionalized graphene airgel 1.

Embodiment 2

[0026] Disperse GO evenly in deionized water, prepare 10 mL of 2 mg / mL GO aqueous solution, add NaOH, adjust pH=12, stir and mix at room temperature for 5 minutes, then add 400 mg of γ-(methacryloyloxy)propyltrimethoxy base silane KH570, and stirred evenly for 5 minutes, then raised the temperature to 80°C and kept for 12 hours to prepare functionalized graphene hydrogel. The hydrogel was dialyzed with water for 6 hours, and then freeze-dried at -50°C with a vacuum of 5 Pa for 48 hours to prepare functionalized graphene airgel 2.

[0027] The SEM image of the silane (KH570) functionalized graphene airgel 2 prepared in Example 2, its internal structure is interlinked, foldable and other characteristics such as figure 2 shown.

Embodiment 3

[0029] Disperse GO evenly in deionized water, configure 10mL of 5mg / mL GO aqueous solution, add HI, adjust pH=1, stir and mix at room temperature for 20min, add 2.5mg of tridecafluorooctyltrimethoxysilane, and stir well After 20 minutes, the temperature was raised to 120°C and kept for 4 hours to obtain a functionalized graphene hydrogel. The hydrogel was dialyzed with water for 1 h, and then freeze-dried at -50° C. with a vacuum of 0.3 Pa for 48 h to obtain silane-functionalized graphene airgel 3.

[0030] The silane functionalized graphene airgel 3 prepared in embodiment 3 has superhydrophobicity such as image 3 As shown, the left figure is the graphene airgel 3 processed by tridecafluorooctyltrimethoxysilane prepared in Example 3, and the right figure is the untreated graphene airgel.

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Abstract

The invention relates to the technical field of aerogels. In order to solve the problem that no simple preparation technique for controlling the pore size and surface properties of the three-dimensional graphene can implement effective control on the structural dimension, lamellar action mode, interface properties and the like of the three-dimensional graphene, the invention provides a preparation method of a silane functionalized graphene aerogel material. The method comprises the following steps: preparing a functionalized graphene hydrogel, and preparing the functionalized graphene aerogel. The preparation process is nontoxic and pollution-free. The prepared graphene aerogel can be used in the fields of oil-water separation, pressure-sensitive / gas-sensitive, polymer nano composite materials and the like.

Description

technical field [0001] The invention relates to the technical field of airgel, in particular to a preparation method of a silane functionalized graphene airgel material. Background technique [0002] Graphene is composed of two-dimensional single-layer carbon atoms, which is like a six-membered benzene ring honeycomb structure, and the carbon atoms are separated by sp 2 hybridization. Such a structure makes it have unique physical and chemical properties, such as high Young's modulus (1TPa), high strength (130GPa), high thermal conductivity (5000 W / (m K)), high conductivity (6000 S / cm), high specific surface area (2630 m 2 / g). Since 2004, graphene has shown broad application prospects in energy storage, electronic devices, chemical catalysis, environment and other fields. [0003] In recent years, graphene airgel has low density, high specific surface area, high electrical and thermal conductivity, and has attracted widespread attention in the fields of capacitors, oil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/184
CPCC01P2002/80C01P2004/03C03B35/16
Inventor 汤龙程官礼知赵丽裴勇兵陈利民吴连斌蒋剑雄
Owner HANGZHOU NORMAL UNIVERSITY