纳米二氧化锆改性聚酰亚胺薄膜的制备及性能研究

Preparation and properties of nano-zirconium oxide modified polyimide films

摘要:

聚酰亚胺在工程高分子材料领域广受关注，开发新型耐高温、疏水性良好的聚酰亚胺薄膜材料是推动高性能高分子材料在电动汽车等高新技术领域工程化应用的重要突破口。本工作采用两步法合成复合型聚酰亚胺薄膜，通过纳米ZrO2粉体对聚酰亚胺薄膜进行改性，借助XRD、SEM、能谱、红外光谱等手段对复合薄膜进行结构和形貌的表征，并测试了复合薄膜的热稳定性、疏水性及抗拉强度，结果表明纳米ZrO2的加入增强了聚酰亚胺分子链之间的相互作用，使其耐热性能得到显著提高，分解温度可以提高20 ℃，复合薄膜的水接触角提高60%，疏水性能得到提高。本工作为开发新型高性能聚酰亚胺高分子材料提供了新的思路。

Abstract:

Polyimide is widely concerned in the field of engineering polymer materials. The development of a new type of polyimide film material with high temperature resistance and good hydrophobicity is an important breakthrough to promote the engineering application of high-performance polymer materials in electric vehicles and other high-tech fields. In this work, the composite polyimide film was synthesized by a two-step method, and the polyimide film was modified by nano-ZrO2 powder. The structure and morphology of the composite film were characterized by means of XRD, SEM, energy spectrum, infrared spectroscopy, etc. and the thermal stability, hydrophobicity and tensile strength of the composite film were tested. The results showed that the addition of nano-ZrO2 enhanced the interaction between polyimide molecular chains, and the heat resistance of polyimide was significantly improved. The decomposition temperature was increased by 20 ℃, the water contact Angle was increased by 60%, and the hydrophobicity was improved. This work provides a new idea for the development of novel high-performance polyimide polymer materials.