论文部分内容阅读
利用同轴静电纺丝方法,制备聚丁二酸丁二酯(PBS)-丝素蛋白(SF)核-壳结构复合超细纤维膜,并对复合超细纤维膜进行FE-SEM、TEM形态表征,分析了内层纺丝流率对纤维形貌的影响;通过FTIR和XRD测试,比较了甲醇处理前后复合超细纤维膜分子结构和结晶性能的变化,并进行力学性能测试。结果表明:通过对纤维核层PBS、壳层SF和横截面的观察,复合超细纤维有明显的核-壳结构,可以清晰看出纤维的核层PBS和壳层SF;随着核层纺丝流率的增大,超细纤维的平均直径增大;甲醇处理后,复合超细纤维膜中壳层SF分子结构由无规构象转变为β-折叠构象,复合超细纤维膜核层衍射吸收强度减小,但整个核-壳结构复合超细纤维膜结晶性能无明显变化;甲醇处理后拉伸破坏应力从14.9 MPa增大到17.2 MPa,但拉伸破坏应变从96.8%减小到81.8%。
The polybutylene succinate (PBS) -sofibrillar protein (SF) core-shell composite microfiber membrane was prepared by coaxial electrospinning method. The composite ultrafine fiber membrane was characterized by FE-SEM, TEM The influence of internal spinning flow rate on the morphology of the fiber was analyzed. The changes of molecular structure and crystallinity of the composite microfiber membrane before and after methanol treatment were compared by FTIR and XRD, and the mechanical properties were tested. The results show that the core-shell PBS and shell SF of the fiber can be clearly seen by observing the fiber core layer PBS, the shell SF and the cross-section, and the composite micro-fiber has obvious core-shell structure. And the average diameter of ultrafine fibers increased. After the methanol treatment, the molecular structure of the SF in the composite microfiber membrane changed from a random conformation to a β-sheet conformation, and the composite ultrafine fiber membrane nuclear layer diffraction However, the crystallinity of the whole core-shell composite microfiber membrane did not change significantly. The tensile failure stress increased from 14.9 MPa to 17.2 MPa after methanol treatment, but the tensile failure strain decreased from 96.8% to 81.8 %.