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Method for preparing graphene-containing phenolic foams

A technology of phenolic foam and graphene, applied in the field of preparation of phenolic composite foam, can solve problems such as being unsuitable for large-scale industrial production, complex process, low efficiency, etc., and achieve the effects of being suitable for large-scale industrial production, simple process and improving efficiency

Active Publication Date: 2014-05-14
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing graphene-containing phenolic foam in order to solve the problems of high cost, low efficiency, complex process and unsuitability for large-scale industrial production in the preparation of existing graphene polymer composite materials

Method used

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Experimental program
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specific Embodiment approach 1

[0013] Specific embodiment one: the preparation method of the phenolic foam that this embodiment contains graphene, realizes according to the following steps:

[0014] 1. Add the ethanol solution of silane coupling agent with a mass concentration of 0.5% to 10% into the ethanol solution of expandable graphite, stir and react at 30 to 70°C for 1 to 5 hours, and centrifuge at 16000r / min for 15 to 60 minutes. The solid obtained by centrifugation is placed in a vacuum oven and dried at 60-90°C for 24-48 hours to obtain expandable graphite treated with a silane coupling agent;

[0015] 2. Add 0.1 to 20 parts by weight of the expandable graphite treated with the silane coupling agent obtained in step 1 to 100 parts by weight of phenol, ultrasonically vibrate for 0.5 to 5 hours, and then add 46 to 138 parts by weight of formaldehyde solution with a mass concentration of 37%. and 0.5-5 parts by weight of zinc acetate, and then raise the reaction temperature to 60-80°C at a heating rat...

specific Embodiment approach 2

[0018] Embodiment 2: This embodiment differs from Embodiment 1 in that the mass concentration of the expandable graphite ethanol solution in step 1 is 0.1%-5%, and the particle size of the expandable graphite is 50-150 μm. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0019] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the mass ratio of the ethanol solution of the silane coupling agent to the ethanol solution of expandable graphite in step 1 is (1-10):1. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention discloses a method for preparing graphene-containing phenolic foams and relates to a method for preparing graphene-containing composite phenolic foams. The problem that an existing method for preparing a graphene high polymer composite material is high in cost, low in efficiency, complex in process and unsuitable for large-scale industrial production is solved. The method disclosed by the invention comprises the following steps: 1, preparing expansible graphite treated by a silane coupling agent; 2, mixing the expansible graphite treated by the silane coupling agent, phenol, a formaldehyde aqueous solution and zinc acetate to prepare a mixture A; 3, preparing a graphene-containing phenolic resin; and 4, mixing the graphene-containing phenolic resin, Tween-80, n-pentane, p-toluenesulfonic acid and polyethylene glycol 400 to obtain a mixture B, drying, and standing at room temperature to obtain the graphene-containing phenolic foams. The graphene is generated by utilizing intercalation reaction polymerization heat in situ, so that the graphene and the phenolic resin are synchronously generated, and the efficiency is improved. Meanwhile, the graphene is prevented from being directly taken as a raw material, the preparation cost is reduced, and the method is simple in process and suitable for large-scale industrial production.

Description

technical field [0001] The invention relates to a preparation method of graphene-containing phenolic composite foam. Background technique [0002] Phenolic resin is one of the oldest artificially synthesized resins. Foam materials prepared with phenolic resin have the characteristics of abundant raw materials, simple production process, low cost, low flame retardancy and low smoke rate, so it is a commonly used insulation material. However, phenolic foam also has disadvantages, such as high foam brittleness, easy pulverization, and high water absorption, which hinder its application development. [0003] Graphene is a single-layer carbon atomic surface material stripped from graphite materials. It is a two-dimensional structure of carbon and a "super material". , harder than diamonds, and almost zero in weight. By combining graphene with phenolic foam, the excellent properties of graphene can be used to improve the mechanical properties of phenolic foam. The sheet struct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G8/10C08K9/06C08K3/04C08J9/14C08L61/10
Inventor 胡桢黄玉东王亚飞赵生俊李震辉李楠易国星
Owner HARBIN INST OF TECH
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