Multilayer functionalized graphene nanometer hybrid material utilizing polystyrene as hinge and preparation method thereof

A nano-hybrid material and polystyrene technology, applied in the field of material preparation, can solve the problems of numerous steps, cumbersome operations, and high reaction temperature, and achieve the effects of improving thermal stability, protecting the environment, and improving similar compatibility.

Active Publication Date: 2015-05-06
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention aims at the deficiencies of the prior art such as high reaction temperature, cumbersome operation, and numerous steps; especially when the target product cannot be obtained through the step-by-step synthetic route, it provides a multi-layer function hinged polystyrene (PS) Graphene nano-hybrid materials

Method used

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  • Multilayer functionalized graphene nanometer hybrid material utilizing polystyrene as hinge and preparation method thereof
  • Multilayer functionalized graphene nanometer hybrid material utilizing polystyrene as hinge and preparation method thereof
  • Multilayer functionalized graphene nanometer hybrid material utilizing polystyrene as hinge and preparation method thereof

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Experimental program
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preparation example Construction

[0030] Such as figure 1 Shown, a kind of polystyrene (PS) is the multilayer functionalized graphene nano-hybrid material of hinge and one-pot preparation method thereof, and this method comprises the following steps:

[0031] Step 1, adopt the improved Hummers method to prepare graphite oxide solid with natural flake graphite powder;

[0032] Step 2, under ultrasonication for 3-10 hours, prepare graphene oxide DMF suspension, the ratio of graphite oxide and DMF solvent is 7.5-15 mg / mL;

[0033] Step 3. Add excess thionyl chloride to the graphene oxide DMF suspension and react at 70-90°C for at least one day, then distill under reduced pressure to remove excess SOCl 2 Obtained afterwards, wherein the ratio of graphite oxide to thionyl chloride is not more than 10mg / mL (GOCl);

[0034] Step 4, prepare the DMF solution of CDs and PS, the mass ratio of CD and PS is (50:1)~(1:50); the ratio of CDs and DMF is 0.67~120mg / mL;

[0035] Step 5, mix the GOCl obtained in step 3 with th...

Embodiment 1

[0038] The first step, the preparation of graphite oxide solid;

[0039] Pre-oxidize 20 g of natural graphite (400 mesh) with 30 mL of concentrated sulfuric acid, 10 g of potassium persulfate and 10 g of phosphorus pentoxide at 80°C, wash with water until pH = 7, and dry at room temperature overnight for use;

[0040]Cool 460mL of concentrated sulfuric acid to about 0°C, then add 20g of pre-oxidized graphite into it, slowly add 60g of potassium permanganate so that the temperature of the system does not exceed 20°C, after the addition is completed, raise the temperature to 35°C, and stir for 2 hours, And slowly add 920mL of deionized water in batches, so that the system temperature does not exceed 98°C, and after stirring for 15 minutes, add 2.8L of deionized water and 50mL of 30% hydrogen peroxide. The resulting bright yellow suspension was filtered under reduced pressure and washed. Until there is no sulfate ion in the filtrate, and when it is neutral, the product is dried ...

Embodiment 2

[0049] The first to third steps are the same as steps one to three in Example 1.

[0050] Step 4: Weigh 0.2g α-cyclodextrin (β-CDs) and 0.2g PS into 30mL DMF and stir until completely dissolved to prepare a DMF solution of CDs / PS;

[0051] The fifth to sixth steps are the same as steps five to six in Example 1.

[0052] Infrared spectrum such as figure 2 f shows that the nano-hybrid material has been successfully synthesized.

[0053] Its thermal stability is as image 3 As shown in a, in the figure, the thermal stability of functionalized graphene nanohybrid materials is higher than that of unmodified graphene oxide, as well as intermediate products.

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Abstract

The invention discloses a multilayer functionalized graphene nanometer hybrid material utilizing polystyrene as a hinge and a preparation method thereof. The preparation method utilizes a covalent and non-covalent organic modification technology, produces the nanometer hybrid material with thermal stability improvement effects by a one-kettle method, and can adjust a PS load capacity of the hybrid material by change of cyclodextrin types and a reaction temperature. The functionalized hybrid material has simple and efficient synthesis processes, has a simple post-treatment process and is suitable for massive preparation. Polystyrene is a polymer with a wide application range and can be widely used as an insulating material, a heat insulation material, a transparent film and a capacitor dielectric layer in the light engineering and electric fields. Polystyrene has substantial disadvantages of low brittleness and low heat resistance. Through use of PS as a hinge, compatibility of the graphene material and PS is greatly improved and the multilayer functionalized graphene nanometer hybrid material has a latent application value in the field of composite materials and is especially suitable as a nanometer filling material for preparation of a heat-resistant flame-retardant polymer nanometer composite material.

Description

technical field [0001] The invention relates to a polystyrene (PS) hinged multilayer functionalized graphene nano-hybrid material and a preparation method thereof, in particular to a PS hinged one-pot chemically modified graphene oxide nano-hybrid material with enhanced thermal stability. A hybrid material and a preparation method thereof belong to the field of material preparation. Background technique [0002] Since its discovery in 2004, graphene has attracted the attention of researchers all over the world due to its excellent physical and chemical properties. Complete graphene is a hexagonal honeycomb-like two-dimensional nanomaterial composed of a single layer of carbon atoms. Since its surface does not contain functional groups, graphene is neither hydrophilic nor lipophilic, and is hardly dispersed in solvents, so it is difficult to be applied in polymer nanocomposites and industrialized mass production. [0003] In order to improve the surface properties of graphe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L25/06C08K9/04C08K3/04C01B31/04
Inventor 张树鹏高娟娟张馨方叶惠丽俞春培宋海欧钱悦月姚冬婷余荣兵
Owner NANJING UNIV OF SCI & TECH
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