多功能生物基聚酰胺56复合纤维的制备与性能[1]

Preparation and Properties of Multifunctional Bio-based PA56 Composite Fibers

摘要:

以生物基PA56为基体负载nano-ZnO，并利用熔融纺丝技术制备多功能生物基nano-ZnO/PA56复合纤维，采用SEM、 FTIR和XRD等方法对纤维的形貌结构、热性能和结晶性能进行表征，并对力学性能、导热以及抗紫外老化等性能进行研究。结果表明，nano-ZnO在基体中分散均匀，nano-ZnO的加入降低了复合纤维力学性能和热稳定性，提高了复合纤维的结晶温度，表明nano-ZnO在复合纤维中异相成核，复合纤维的力学性能由3.47 cN dtex-1降低到3.06 cN dtex-1，表现出良好的力学性能。复合纤维具有优异的抗菌、导热和抗紫外老化等性能，nano-ZnO含量为0.5 wt%的复合纤维对大肠杆菌和金黄色葡萄球菌的抑菌率达100%，在50s内纤维表面温度提升16 oC，经过140 h紫外老化后2.0% nano-ZnO/PA56复合纤维的力学性能较PA56纤维降解率低9.9%。

Abstract:

Multifunctional bio-based nano-ZnO/PA56 composite fibers were prepared by loading nano-ZnO with bio-based PA56 as the matrix and using melt spinning technology. The morphological structure, thermal and crystalline properties of the fibers were characterized by SEM, FTIR and XRD, and the mechanical, thermal conductivity, and UV aging resistance properties were investigated. The results showed that nano-ZnO was uniformly dispersed in the matrix, and the addition of nano-ZnO decreased the mechanical properties and thermal stability of the composite fibers and increased the crystallization temperature of the composite fibers, indicating that nano-ZnO nucleated heterogeneously in the composite fibers, and the mechanical properties of the composite fibers were reduced from 3.47 cN dtex-1 to 3.06 cN dtex-1, which showed good mechanical properties. The composite fiber has excellent antibacterial, thermal conductivity and UV aging resistance, and the composite fiber with 0.5 wt% nano-ZnO content has 100% inhibition of E. coli and S. aureus, and the surface temperature of the fiber is increased by 16 oC in 50 s. The mechanical properties of the 2.0% nano-ZnO/PA56 composite fiber are 9.9% lower than that of the PA56 after 140 h of UV aging. fiber degradation rate was 9.9% lower.