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采用丙烯酸为修饰剂,通过水基sol-gel法制备了二氧化钛纳米薄膜,研究了反应物浓度、反应温度等条件对薄膜形貌的影响.研究结果表明,作为修饰剂的丙烯酸浓度对薄膜的形貌起着重要的控制作用.依据反应条件的不同,丙烯酸可以以单分子或聚合物的形式与Ti原子结合.单分子丙烯酸起到水解抑制剂的作用,而聚合态丙烯酸则根据反应条件的不同可能起到抑制剂或敏化剂的作用,并最终确定所制备的纳米薄膜的微观形貌.通过对丙烯酸/钛酸四丁酯摩尔比等反应条件的调节可以得到具有不同微结构的二氧化钛纳米薄膜.
The effects of the concentration of reactants, reaction temperature and other conditions on the morphology of the films were investigated by using acrylic acid as modifier and water-based sol-gel method. The results showed that the concentration of acrylic acid Appearance plays an important role in the control.According to the different reaction conditions, acrylic acid can be combined with the Ti atom in the form of single molecule or polymer.A single molecule of acrylic acid acts as a hydrolysis inhibitor, and polymeric acrylic acid according to the different reaction conditions May play the role of inhibitor or sensitizer, and finally determine the micro-morphology of the prepared nano-films prepared by adjusting the reaction conditions such as acrylic acid / tetrabutyl titanate molar ratio can be obtained with different microstructure of titanium dioxide nano film.