Polymer film sound absorbing material and preparation method thereof

A technology of polymer film and sound-absorbing material, applied in the field of polymer film sound-absorbing material and its preparation, to achieve the effects of simple film-forming process, widening sound-absorbing frequency band, and easy source

Inactive Publication Date: 2010-07-14
WUHAN POLYTECHNIC UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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  • Polymer film sound absorbing material and preparation method thereof
  • Polymer film sound absorbing material and preparation method thereof
  • Polymer film sound absorbing material and preparation method thereof

Examples

Experimental program
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Example Embodiment

[0030] Example 1: Preparation of polyaniline film

[0031] The synthesis reaction equation of basic polyaniline:

[0032]

[0033] Preparation of conductive polyaniline: add aniline and hydrochloric acid solution in a three-necked flask in proportion, and slowly drop the hydrochloric acid solution of ammonium persulfate into the solution under high-speed stirring in an ice water bath. After dripping, keep the reaction temperature at 0°C and react for 7-12 hours. Then stand for 12-16 hours, filter and wash to neutrality, and vacuum dry for later use.

[0034] Therefore, take 10 parts of polyaniline, 2 parts of epoxy resin, 1 part of polyamide resin, 60 parts of N-methylpyrrolidone, and 20 parts of methyl ethyl ketone, make a slurry with ultrasonic, and then apply it to nylon cloth and dry it. Film with a thickness of 0.32 mm. The sound absorption coefficient test results are shown in Table 1.

Example Embodiment

[0035] Example 2: Preparation of polyaniline graphite film

[0036] The preparation of conductive polyaniline was the same as in Example 1. Take 10 parts of polyaniline polymer, 2 parts of epoxy resin, 1 part of polyamide resin, 60 parts of N-methylpyrrolidone, and 20 parts of methyl ethyl ketone according to the ratio of polyaniline: nanographite=1:0.2, and make slurry with ultrasonic , And then coated on nylon cloth, dried into a film with a thickness of 0.35 mm. The sound absorption coefficient test results are shown in Table 1.

Example Embodiment

[0037] Example 3: Preparation of polyaniline graphite film

[0038] The preparation of conductive polyaniline was the same as in Example 1. Take 10 parts of polyaniline polymer, 2 parts of epoxy resin, 1 part of polyamide resin, 60 parts of N-methylpyrrolidone and 20 parts of methyl ethyl ketone according to the ratio of polyaniline: nanographite = 1:0.3, and make slurry with ultrasonic , And then coated on nylon cloth, dried into a film with a thickness of 0.43 mm. The sound absorption coefficient test results are shown in Table 1.

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Abstract

The invention discloses a polymer film sound absorbing material and a preparation method thereof, wherein the material consists of polyaniline or polypyrrole, nano-additive and film-forming assistant agent, and the polymer film is prepared by these materials in ratios according to the changing mode of the conductivity. The film has wide sound absorbing frequency band and strong sound absorbing ability, wherein the average sound absorbing coefficient is bigger than 0.5 in the frequency range from 125Hz to 4000Hz, and the biggest sound absorbing coefficient reaches 0.95, thereby overcoming the defect that the low frequency band of a normal sound absorbing material has bad sound absorbing effect. The material quality of the film sound absorbing material is light and thin, the thickness thereof is only between 0.2 and 0.6 millimeters and the weight thereof in each square kilometer is only between 200g and 500g.

Description

technical field [0001] The invention belongs to the technical field of special polymer functional materials, and in particular relates to a polymer film sound-absorbing material and a preparation method thereof. Background technique [0002] Noise pollution has become a contemporary worldwide problem, and it is listed as the world's three major pollutions together with water pollution and air pollution. With the rapid development of industry, agriculture, and transportation, noise pollution is becoming more and more serious, and its harm to people's physical and mental health has been increasingly recognized and paid attention to by people; It has become more and more serious and has become a hot issue that has attracted much attention in the process of environmental governance. [0003] At present, as sound-absorbing materials, porous materials are generally used, mostly fiber materials, granular materials, foam materials and metal materials, all of which are lightweight m...

Claims

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Application Information

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IPC IPC(8): C08L79/02C08L79/04C08K3/22C08K3/04C08K3/26C08L63/00C08L77/00C08L33/04C08L75/04C08L1/12G10K11/168B32B27/18B32B27/08B32B27/12
Inventor 张智勇叶石如赵宗煌张开诚未本美曾泳
Owner WUHAN POLYTECHNIC UNIVERSITY
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