氧化石墨烯/丁腈橡胶-聚氯乙烯复合材料的隔声性能

摘要

为了制备一种轻质隔声复合材料, 以氧化石墨烯(GO)为隔声填料, 通过熔融共混法制备了GO/丁腈橡胶-聚氯乙烯(GO/NBR-PVC)复合材料.采用SEM、 XRD、 DMA和万能材料试验机等对GO/NBR-PVC的结构形态、 弹性模量和力学性能等进行测试;利用四通道阻抗管系统对隔声性能进行测试.结果表明, GO在NBR-PVC基体中分散均匀;GO/NBR-PVC的拉伸强度、 弹性模量和阻尼性能明显增大.隔声测试结果表明: GO的添加可以提高GO/NBR-PVC的隔声性能, 尤其在低频段.当GO 的质量分数分别为0.1%、 0.2%、 0.3%、 0.4%时, 复合材料面密度几乎不变, 隔声指数分别提高了0.8 dB、 1.1 dB、 1.5 dB、 1.2 dB;而添加质量分数为30%的重质金属(HM)时, HM/NBR-PVC面密度明显提高, 而隔声指数只提高了0.6 dB.%In order to prepare a light sound insulation composite, graphene oxide (GO) was used as the filler to prepare GOitrile butadiene rubber-poly(vinyl chloride) (GO/NBR-PVC) sound insulation composites by melt-blending process.The morphology, damping and mechanical properties of GO/NBR-PVC composites were measured by SEM, XRD, DMA and universal material testing machine.The sound insulation property was derived by the four-channel impedance tube system.The results show that GO is homogeneously dispersed in GO/NBR-PVC composites, and the elastic modulus, tensile strength and damping property of the composites improve obviously.Sound insulation experiment indicates that the sound insulation property of the GO/NBR-PVC composites increase, especially in the low frequency range.When GO mass fraction is 0.1%, 0.2%, 0.3%, 0.4%, the composite surface density shows little changes, the sound reduction index increase 0.8 dB, 1.1 dB, 1.5 dB, 1.2 dB, respectively.However, when heavy metal (HM) mass fraction is 30%, the surface density increases obviously, but the sound reduction index only increases 0.6 dB.