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Graphene/nano-silica/polystyrene hybrid material as well as preparation method and application thereof

A technology of nano-silica and polystyrene, applied in the field of composite materials, can solve problems such as difficulty in dispersion, uneven surface, environmental pollution, etc., and achieve good compatibility and dispersion

Active Publication Date: 2018-07-20
CHANGZHOU VOCATIONAL INST OF ENG
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Problems solved by technology

[0009] Using the above technical scheme, the prepared graphene / nano-silicon dioxide / polystyrene hybrid material is a graphene-doped organic rigid particle, which uses less graphene, and all the ingredients of the formula work synergistically to make the prepared The obtained graphene / nanometer silicon dioxide / polystyrene hybrid material has good compatibility with other materials, good dispersion and the prepared hybrid material emulsion can be directly used in water-based glue or polymer emulsion system, or emulsion After demulsification, it is used as a nano-powder to solve the problem of large amount of direct addition of graphene in the prior art, high cost, and difficulty in dispersing; the graphene / nanometer silicon dioxide / polystyrene hybrid material is based on polystyrene Ethylene / SiO 2 Gel disperses and coats graphene to make graphene-modified organic rigid particles; styrene-diluted coupling agent solution is used to treat nano-silica for in-situ copolymerization, because the surface functionality of nano-silica treated with coupling agent is greater than 2. That is, with multiple functional double bonds, it is possible to prepare a silica micro-crosslinked polystyrene gel, and the body-shaped network structure of the gel forms a physical dispersion and coating of graphene; Functionalization Treatment of Nano-SiO with Combined Agent 2 , will lead to nano-SiO 2 Agglomeration and uneven surface; if the silane coupling agent is diluted with a solvent and the SiO is wet treated 2 , there will be environmental pollution problems caused by solvent volatilization leading to VOC emissions; while using a mixed solution of styrene and coupling agent to treat nano-SiO 2 Particles are surface treated. On the one hand, the coupling agent diluted with monomer styrene can treat nano-SiO more uniformly. 2 surface, and does not need to remove styrene monomer; on the other hand, the monomer mixed solution containing coupling 2 Acts as a swelling effect and inhibits the SiO 2 agglomeration, thereby resolving the nano-SiO 2 Surface treatment is difficult to make SiO 2 After surface treatment, the dispersibility is good, the surface is uniform, and there is no environmental pollution problem of VOC emissions caused by solvent volatilization

Method used

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  • Graphene/nano-silica/polystyrene hybrid material as well as preparation method and application thereof
  • Graphene/nano-silica/polystyrene hybrid material as well as preparation method and application thereof
  • Graphene/nano-silica/polystyrene hybrid material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The ingredient formula of this graphene / nanometer silicon dioxide / polystyrene hybrid material is: Graphene: 0.1g, fumed silicon dioxide (nano-SiO 2 ): 2.0g, styrene (St): 91.1g, coupling agent γ-methacryloxypropyltrimethoxysilane: 1.0g, initiator ammonium persulfate: 2.0g, emulsifier OP-10: 2.0 g, emulsifier sodium dodecyl sulfate (SDS): 0.5 g, pH regulator sodium bicarbonate: 1.0 g, demulsifier aluminum potassium sulfate: 0.3 g.

[0045] The preparation method of this graphene / nanometer silicon dioxide / polystyrene hybrid material specifically comprises the following steps:

[0046] (1) The composite emulsifier is fully dissolved in deionized water to prepare a composite emulsifier aqueous solution; the initiator is fully dissolved in deionized water to be prepared as an initiator solution;

[0047] (2) Add a graphene aqueous dispersion with a concentration of 0.1 mg / mL in the mixing tank, add a coupling agent and nano-silica, stir and mix evenly at room temperature wi...

Embodiment 2

[0065] The ingredient formula of this graphene / nano silica / polystyrene hybrid material is: graphene: 0.15g, fumed silica: 6g, styrene (St): 85.85g, coupling agent γ-methyl Acryloxypropyltrimethoxysilane: 1.5g, initiator ammonium persulfate: 1.0g, emulsifier OP-10: 3.0g, emulsifier sodium dodecyl sulfate (SDS): 1.0g, pH adjuster carbonic acid Sodium: 1.0g, demulsifier aluminum potassium sulfate: 0.5g.

[0066] The preparation method of the graphene / nanometer silicon dioxide / polystyrene hybrid material is the same as that in Example 1.

[0067] Obtained by testing, the viscosity and particle size of the prepared graphene / nanometer silicon dioxide / polystyrene hybrid material, its viscosity is: 5.3mpa.s; particle size distribution is as follows Figure 5 .

Embodiment 3

[0069] The hybrid material is composed of: graphene: 0.2g, fumed silica: 8g, styrene (St): 83.3g, coupling agent vinyltrimethoxysilane (A-171): 2.0 g, initiator potassium persulfate: 1.5g, emulsifier polyoxyethylene monolaurate: 2.5g, emulsifier sodium dodecylbenzenesulfonate: 1.5g, pH regulator potassium hydroxide: 0.5g, demulsifier Calcium chloride: 0.5g.

[0070] The preparation method of the graphene / nanometer silicon dioxide / polystyrene hybrid material is the same as that in Example 1.

[0071] Obtained by testing, the viscosity and particle size of the prepared graphene / nanometer silicon dioxide / polystyrene hybrid material, its viscosity is: 5.3mpa.s; particle size distribution is as follows Figure 5 .

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Abstract

The invention relates to a graphene / nano-silica / polystyrene hybrid material as well as a preparation method and application thereof. Graphene is dispersed into graphene dispersion liquid; then, a coupling agent and nano-silica are added; next, refined styrene is added; the mixture is emulsified and dispersed by a compound emulsifying agent water solution; after the ultrasonic dispersion, stable emulsified liquid is formed; next, the styrene is initiated by a water-soluble initiator to perform in-situ emulsion polymerization; a graphene / nano-silica / polystyrene emulsion is prepared, and is directly used for a water-soluble adhesive or a polymer emulsion system; or after the demulsification, the graphene / nano-silica / polystyrene hybrid material is prepared, i.e., styrene / SiO2 gel is used for adsorbing graphene; prepared graphene modified organic rigid particles are used as nanometer powder; the problem of difficult graphene dispersion is solved.

Description

technical field [0001] The invention belongs to the field of composite materials, and in particular relates to a graphene / nano silicon dioxide / polystyrene hybrid material and a preparation method and application thereof. Background technique [0002] Nano-silica and graphene, as two inorganic non-metallic materials, are non-toxic, odorless, and non-polluting, and are widely used in the field of polymer materials. [0003] nano-SiO 2 The small particle size, large specific surface area, and high surface hydroxyl content make it easy to agglomerate, so the solution to the agglomeration problem is to prepare nano-SiO 2 Key issues with materials. nano-SiO 2 There are two main types of surface treatment methods: one uses small organic molecules such as coupling agents for surface treatment, and the other uses polymer-coated particles for surface treatment. Functionalization of nano-SiO with direct coupling agent 2 , the method is simple, but pure coupling agent treatment of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F112/08C08K9/06C08K3/04C08K3/36C08F2/26
CPCC08F2/26C08F112/08C08K3/04C08K3/36C08K9/06C08K2201/011
Inventor 徐亮成高炜斌陆红霞朱文艳杨宵宵
Owner CHANGZHOU VOCATIONAL INST OF ENG
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