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Method for preparing graphene reinforced PMI (polymethacrylimide) foam material

A polymethacrylimide and foam material technology is applied in the field of preparation of graphene reinforced polymethacrylimide foam materials, which can solve the problems of reducing the tensile strength and modulus mechanical properties of PMI foam, and achieve Excellent deformation mechanism, wide application field, effect of increasing electromagnetic shielding performance

Active Publication Date: 2014-01-22
江苏美赫家居有限公司
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Problems solved by technology

[0004] In order to solve the problem that the mechanical properties such as tensile strength and modulus, compressive strength and modulus, shear strength and modulus, bending strength and modulus of PMI foam decrease significantly with the decrease of density

Method used

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  • Method for preparing graphene reinforced PMI (polymethacrylimide) foam material
  • Method for preparing graphene reinforced PMI (polymethacrylimide) foam material

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Embodiment Construction

[0029] A kind of preparation method of graphene reinforced polymethacrylimide foam material, graphene reinforced polymethacrylimide foam is made of graphene, monomer, initiator, crosslinking agent, blowing agent, nucleating agent composition. Concrete formula is the formula component weight ratio of example 1,2,3,4 shown in table 1.

[0030]

[0031] Table 1 Examples of graphene-enhanced polymethacrylimide foams

[0032]

[0033] Concrete preparation steps are as follows:

[0034] (1) Mix monomers, initiators, crosslinking agents, foaming agents, and nucleating agents according to the weight ratios of Examples 1, 2, 3, and 4, and pass through 3000r / min at a water bath temperature of 25°C The speed of the mixer was mixed for 3 hours to stir the reaction solution evenly;

[0035] (2) Add graphene to the raw material solution, place the mixed solution in an ultrasonic disperser at a frequency of 50kHz, and disperse ultrasonically for 50 minutes, so that the graphene can be...

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Abstract

The invention discloses a method for preparing a graphene reinforced PMI (polymethacrylimide) foam material. Graphene is taken as a reinforcing material, methacrylonitrile and methacrylic acid are taken as a comonomer, an initiator, a crosslinking agent, a foaming agent, a nucleating agent and the like are added to prepare a foamable polymerized plate, and finally the foamable polymerized plate is freely foamed and subjected to thermal treatment in a drying oven so as to prepare polymethacrylimide rigid foam. Reactions of crosslinking, cyclization and the like are sufficiently conducted in the foaming and thermal treatment process, so as to harden copolymer molecular chain, and finally the foam plastic with excellent property is prepared. Due to adoption of the method, the tensile strength, the bending strength, the compression strength and the shearing strength of PMI are improved, and the electromagnetic shielding property and the anti-static property of the PMI foam are also improved. The PMI foam with excellent mechanical property can be widely applied to manufacturing of foam interlayer components in the fields of spaceflight, aviation, vessels, trains and the like.

Description

technical field [0001] The invention relates to a preparation method of graphene reinforced polymethacrylimide foam material. Background technique [0002] As a new type of nanomaterial, graphene has many excellent special properties, especially its high strength and stiffness, which are the highest among known materials. Graphene has such excellent strength and rigidity because in the atomic structure of graphene, the bond between carbon atoms is the strongest chemical bond σ bond. In addition to its excellent strength and stiffness, graphene also has excellent toughness and some special deformation mechanisms. [0003] PMI foam is currently the highest strength and stiffness heat-resistant foam, and has excellent thermal creep resistance. The strong polarity, high rigid molecular structure and 100% closed-cell cell structure of PMI foam ensure its heat resistance, strength and rigidity. However, the tensile strength and modulus, compressive strength and modulus, shea...

Claims

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Application Information

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IPC IPC(8): C08L33/20C08L33/02C08K9/00C08K3/04C08F220/46C08F220/56C08F8/48C08J9/04
Inventor 鲁平才魏涛赵钎
Owner 江苏美赫家居有限公司
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