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Fluoroplastic-based micro-nano composite wave-absorbing material and preparation method thereof

A composite wave-absorbing material and fluoroplastic technology, applied in chemical instruments and methods, and other chemical processes, can solve the problems of lack of shielding frequency bands and wave-absorbing performance characterization, and achieve excellent chemical corrosion resistance, scientific preparation methods, and excellent The effect of conductivity

Active Publication Date: 2015-11-25
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although this preparation method has the advantages of simple process conditions, easy process control, no residual impurities or reactants, low cost, high yield, and convenient mass production, it also has the advantages of using the final product as an electromagnetic shielding material. Due to the lack of its specific shielding frequency band and wave-absorbing performance characterization, it is difficult for people to apply it correctly and effectively

Method used

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  • Fluoroplastic-based micro-nano composite wave-absorbing material and preparation method thereof

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Effect test

Embodiment 1

[0022] The concrete steps of preparation are:

[0023] First, the fluoroplastic, carbon nanotube and basalt fiber are uniformly mixed according to the weight ratio of 100:0.5:20 to obtain a mixture; wherein, the fluoroplastic is polyvinylidene fluoride, and the carbon nanotube is single-wall carbon nanotube. The mixture was then placed in a torque rheometer and kneaded for 25 minutes at 200°C to obtain a mixture similar to figure 1 The fluoroplastic-based micro-nano composite absorbing material shown in curve 1.

Embodiment 2

[0025] The concrete steps of preparation are:

[0026] Firstly, the fluoroplastic, carbon nanotube and basalt fiber are uniformly mixed according to the weight ratio of 100:2:14 to obtain the mixture; wherein, the fluoroplastic is polyvinylidene fluoride, and the carbon nanotube is single-wall carbon nanotube. The mixture was then placed in a torque rheometer and kneaded at 240°C for 20 minutes to obtain figure 1 The fluoroplastic-based micro-nano composite absorbing material shown in curve 1.

Embodiment 3

[0028] The concrete steps of preparation are:

[0029] Firstly, the fluoroplastic, carbon nanotube and basalt fiber are uniformly mixed according to the weight ratio of 100:8:8 to obtain a mixture; wherein, the fluoroplastic is polyvinylidene fluoride, and the carbon nanotube is single-wall carbon nanotube. The mixture was then placed in a torque rheometer and kneaded for 15 minutes at 275°C to obtain a mixture similar to figure 1 The fluoroplastic-based micro-nano composite absorbing material shown in curve 2.

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Abstract

The invention discloses a fluoroplastic-based micro-nano composite wave-absorbing material and a preparation method thereof. The material comprises fluoroplastic, a carbon nanotube and a basalt fiber in a weight ratio of 100: 0.5-20: 0.5-20, wherein the fluoroplastic is one selected from the group consisting of polytetrafluoroethylene, a perfluoro (ethylene-propylene) copolymer, a poly(perfluoroalkyloxy) resin, polytrifluorochloroethylene, an ethylene-trifluorochloroethylene copolymer, an ethylene-tetrafluoroethylene copolymer, polyvinylidene fluoride and polyvinyl fluoride, the carbon nanotube has a diameter of 20 to 30 nm and length of 10 to 30 mu m, and the basalt fiber has a diameter of 13 to 18 mu m and length of 6 to 25 mm. The preparation method adopts melt blending and comprises the following steps: uniformly mixing the fluoroplastic, the carbon nanotube and the basalt fiber so as to obtain a mixture; and placing the mixture in a torque rheometer and carrying out mixing at a temperature of 200 to 350 DEG C for 5 to 25 min so as to prepare the fluoroplastic-based micro-nano composite wave-absorbing material. The fluoroplastic-based micro-nano composite wave-absorbing material has the characteristics of a wide shielding frequency range and good wave-absorbing performance and can be used as a material for prevention of electromagnetic wave pollution.

Description

technical field [0001] The invention relates to a composite wave-absorbing material and a preparation method thereof, in particular to a fluoroplastic-based micro-nano composite wave-absorbing material and a preparation method thereof. Background technique [0002] In today's era of rapid development of electronics and microelectronics industries, conductive plastics as electromagnetic shielding materials are necessary protective functional materials to prevent electromagnetic wave pollution. Based on the above factors, people have made unremitting efforts to obtain conductive plastics, such as "a method for preparing a particle-filled conductive thermoplastic polymer" disclosed in the Chinese invention patent application document CN101812239A published on August 25, 2010 . The preparation method mentioned in the application document first prepares the carbon nanotube filled conductive thermoplastic high polymer primary masterbatch and the stainless steel fiber filled high ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/18C08L27/20C08L29/10C08L27/12C08L23/08C08L27/16C08L27/14C09K3/00C08K7/00C08K3/04C08K7/10B29C35/00
Inventor 张献田兴友郑康陈洪莲包超顾振王欢
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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