Pan Dan, Liu Siqi, Wang Licheng, Sun Junfen, Chen Long, Sun Baozhong
State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China.
College of Textiles, Donghua University, Shanghai 201620, China.
Materials (Basel). 2020 Sep 25;13(19):4279. doi: 10.3390/ma13194279.
Melt-spun surface structured fiber could be a large-scale versatile platform for materials with advanced surface function and local properties. Fibers with distinct surface and bulk structures are developed by tailoring the viscosity ratio and blend ratio of polymer component using the melt-spinning method. Spherical bulge and fibril groove structured fibers are obtained in different viscosity ratio and blend ratio systems. The interfacial bonding between fiber and matrix is improved due to the mechanical interlocking between the structured surface and matrix. The low-viscosity second phase stays as a spherical droplet even in high content. The second phase in matched- and high-viscosity ratio cases is deformed into fibril like droplet which causes an in-situ fibration of the second phase in polymer blend fiber with an enhanced mechanical property. This method provides a simple route to developing polymer materials with surface structure and appropriate mechanical properties to apply in textile and polymer fiber-reinforced composite materials.
熔纺表面结构化纤维可以成为具有先进表面功能和局部特性材料的大规模通用平台。通过使用熔纺方法调整聚合物组分的粘度比和混合比，开发出具有不同表面和本体结构的纤维。在不同的粘度比和混合比体系中获得了球形凸起和原纤维沟槽结构的纤维。由于结构化表面与基体之间的机械互锁，纤维与基体之间的界面结合得到改善。即使在高含量下，低粘度第二相仍保持为球形液滴。在匹配粘度比和高粘度比情况下，第二相会变形为原纤维状液滴，这会导致聚合物共混纤维中第二相的原位纤维化，从而提高机械性能。该方法为开发具有表面结构和适当机械性能的聚合物材料提供了一条简单途径，可应用于纺织品和聚合物纤维增强复合材料。
