仿贝壳层状MTM/PVA/ANF复合薄膜的制备及其性能研究

Preparation and Properties of Nacre-inspired MTM/PVA/ANF Composite Films by Different Methods

中文关键词:  仿贝壳层状结构  芳纶纳米纤维  力学性能  亲水性能

Key Words:nacre-inspired structure  aramid nanofibers  mechanical properties  hydrophilic properties

中文摘要:

      通过水蒸发诱导自组装（A）和真空辅助抽滤（F）及其与离心处理（C）组合4种不同方法制备仿贝壳层状结构的蒙脱土/聚乙烯醇/芳纶纳米纤维（MTM/PVA/ANF）复合薄膜，并采用扫描电子显微镜（SEM）、原子力显微镜（AFM）、热重分析仪（TGA）、紫外分光光度计、动态接触角测试仪和拉伸测试仪对复合薄膜的微观结构、热稳定性、透光率、亲水性和力学性能进行表征。结果表明，不同方法（A、CA、F和CF）制得的复合薄膜都呈明显的层状结构，但复合薄膜的透光率、亲水性和力学性能不同。通过F法制备的复合薄膜具有更高的透光率和更好的疏水性；通过CF法制备的复合薄膜具有最优的力学性能，拉伸强度可达132.4 MPa，而通过A法制备的复合薄膜韧性最佳，断裂伸长率可达11.3%。

Abstract:

      MTM/PVA/ANF composite films with nacre-like structure were prepared by water evaporation induced self-assembly （A）， vacuum-assisted suction filtration （F） and their combination with centrifugal treatment （C）. The microstructure， thermostability， light transmittance， hydrophilicity， and mechanical properties of the composite films were characterized by SEM， AFM， TGA， UV spectrometry， dynamic contact angle and tensile tester. The results showed that the composite films obtained by different combinations of preparation methods （A， CA， F， CF） exhibit a distinct layered structure， and the transmittance， hydrophilicity and mechanical properties of the films were different. The composite film prepared by method F had higher light transmittance and better hydrophobic property； the composite film prepared by method CF had the best mechanical properties， and its tensile strength reached to 132.4 MPa， and the composite film prepared by method A had more excellent toughness and its elongation at break was as high as 11.3%.