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主要研究了BA/PVA、纳米TiO2和催化剂及表面活性剂的用量、反应温度和时间等因素对原位复合材料膜性能的影响;采用原子力显微镜(AFM)对所制备的原位复合材料的结构、微观形貌进行了分析。结果表明,在PVB树脂合成阶段中引入纳米TiO2粒子,制得的原位复合材料的力学性能尤其韧性得到了明显提高。在TiO2相对PVB含量较低时(为3.6%),其断裂伸长率达到纯PVB的6倍左右。其优化合成条件为:TiO2用量为PVA量的6%,BA/PVA质量配比为0.65,催化剂用量为0.9%,表面活性剂用量为1%。
The effects of the amount of BA / PVA, nano-TiO2 and catalyst and surfactant, the reaction temperature and time on the properties of in-situ composite films were studied. The structure of the in-situ composites prepared by atomic force microscopy (AFM) , Microscopic morphology was analyzed. The results show that the mechanical properties, especially the toughness, of the in-situ composites prepared by introducing nano-TiO2 particles in the PVB resin synthesis phase have been significantly improved. When the relative PVB content of TiO2 is low (3.6%), the elongation at break reaches about 6 times that of pure PVB. The optimal synthesis conditions were as follows: the amount of TiO2 was 6% of PVA, the mass ratio of BA / PVA was 0.65, the amount of catalyst was 0.9% and the amount of surfactant was 1%.