| Domestic sound absorbent rubbery materials can not meet the need of national defense well due to their poor elasticity and sound absorbent especially at the high frequency and at the ambient temperature, in this article two new design ideas for sound absorbent and damping rubbery materials is accordingly put forward that includes rubber/nano-filler composites and rubber/nano-filler piezoelectricity materials. Meanwhile, surface modification, composition design and properties of the materials are studied in detail, and the novel rubbery materials with the good balancing elasticisity, sound absorbent and flow properties are successfully prepared.According to the results, Sodium stearate (NaSA) modified hollow fibrillar silicate (HFS) can be well dispersed in isobutylene isoprene rubber (IIR) and enhance the loss factor (tan8) of IIR. Silane coupling agent can strengthen the interfacial bonding between nano-silicon (SiO2) and rubber, and the elasticity of rubber is improved. Ultrafine hollow glass bead (GB) can markedly increase the loss factor of rubber but little effect on the rubber viscosity. Nano-alumina has dual effects of heat-conduct and reinforcing on the rubber. Based on the mentioned two design ideas, the compositions of two different nano-elastomer materials are regulated, and these two materials exhibit the good balancing sound absorbent, mechanical properties, solvent-resistance and flow propertiesAccording to the analysis on the foreign sound absorbent rubber sample, the blend of butadiene acrylonitrile (NBR) rubber and polyisoprene rubber is used as rubber matrix. Moreover, a rubbery material with the good elasticity, sound absorbent and flow properties are smoothly reproduced. Theexperimental results from the military show that the overall properties meet the use's requirement.
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