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Application of graphene as foaming agent to preparation of laser-induced polymer foaming material

A technology of laser-induced and foaming materials, which is applied in the application field of graphene as a foaming agent in the preparation of laser-induced polymer foaming materials, can solve the problems of undisclosed graphene application and the like, and achieves easy industrial application and foaming. Good effect and uniform cell structure

Active Publication Date: 2018-11-20
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Disclosed as CN102939330A is a kind of laser-induced polymer foaming material, which includes polymer, laser absorber and foaming agent, but it does not disclose graphene as foaming agent in preparing laser-induced polymer foaming material application

Method used

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  • Application of graphene as foaming agent to preparation of laser-induced polymer foaming material
  • Application of graphene as foaming agent to preparation of laser-induced polymer foaming material
  • Application of graphene as foaming agent to preparation of laser-induced polymer foaming material

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Graphene with a sheet thickness of 5.1 nm is added to polypropylene in an amount of 0.01 wt %, blended and extruded by a twin-screw extruder, and pelletized: the resulting mixed pellets are directly injection molded in an injection molding machine, A standard model is made, and the temperature during processing is controlled at 180°C to 230°C.

[0032] The following conditions were used for laser-induced foaming of the above-mentioned standard template: pulsed near-infrared laser, laser wavelength of 1064nm, scanning speed of 1000mm / s, laser energy of 10W, and laser frequency of 30KHz. The foaming effect is shown in Table 1.

Embodiment 2

[0034] The addition amount of graphene is 0.05wt%, and other conditions are identical with embodiment 1, and foaming effect is shown in table 1.

[0035] After the standard template is foamed, the liquid nitrogen brittle fracture is carried out and the cross-section of the foamed area is tested by a scanning electron microscope (SEM). The scanning electron microscope photo of the cell structure is shown in figure 1 .

Embodiment 3

[0037] The addition amount of graphene is 0.20wt%, and other conditions are identical with embodiment 1, and foaming effect is shown in table 1.

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Abstract

The invention provides application of graphene as a foaming agent to preparation of a laser-induced polymer foaming material. Experimental results show that the graphene can rapidly cause surface foaming of a polymer under laser induction under the condition of a very small addition amount, a foam structure of a foamed area is uniform and the foaming effect is good, so that the graphene is very suitable for industrial application.

Description

technical field [0001] The invention relates to the application of graphene as a foaming agent in the preparation of laser-induced polymer foaming materials. Background technique [0002] Polymer foaming materials generally refer to a class of materials that generate or generate countless cells in polymer materials by adding physical or chemical foaming agents to polymer materials. [0003] Laser-induced polymer foaming technology uses the principle of high-energy laser to cause local foaming of polymer materials. Compared with the traditional foaming technology, this new foaming technology has the advantages of local control, which can accurately and effectively control the foaming in a certain area of ​​the material. [0004] However, most polymer materials (such as polypropylene, polyethylene, etc.) cannot be directly subjected to laser-induced foaming. In general, it is necessary to add specific additives (such as foaming agent) before laser irradiation can form the su...

Claims

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Application Information

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IPC IPC(8): C08J9/04C08L23/12C08L69/00C08L67/02C08L77/06C08L63/00
CPCC08J9/04C08J2323/12C08J2363/00C08J2367/02C08J2369/00C08J2377/06
Inventor 周涛贾礼洋
Owner SICHUAN UNIV
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