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以直接沉淀法合成了纳米氧化锌(ZnO),使用硅烷偶联剂对其进行表面改性,并制备了纳米ZnO与液体硅橡胶的复合材料,对改性前后纳米ZnO的结构进行了表征,并对复合材料的相关性能进行了研究。结果表明:通过接枝反应,硅烷偶联剂可以接枝到纳米ZnO表面,改性前后ZnO的晶型不发生变化;在较低添加量的情况下,纳米ZnO可以在一定程度上提高液体硅橡胶的力学性能,当添加量为2%时,改性前后纳米ZnO制备的液体硅橡胶复合材料的导热系数可以从0.189W/m.K分别提高到0.506W/m.K和0.61W/m.K。
Nanometer ZnO was synthesized by direct precipitation method and its surface was modified by silane coupling agent. The composite material of ZnO and liquid silicone rubber was prepared. The structure of ZnO was characterized before and after modification. The related properties of the composites were studied. The results showed that the silane coupling agent could be grafted onto the surface of nano-ZnO by grafting reaction, the crystal form of ZnO did not change before and after modification. At lower dosage, nano- The mechanical properties of the rubber can be improved from 0.189W / mK to 0.506W / mK and 0.61W / mK, respectively. The addition of 2% can improve the thermal conductivity of the liquid silicone rubber composites prepared by nano-ZnO before and after modification.