Zhao Yanjiao, Song Ruochen, Pan Runan, Zhang Meiling, Liu Lifang
College of Textiles, Donghua University, Shanghai 201620, China.
Materials (Basel). 2023 Dec 28;17(1):160. doi: 10.3390/ma17010160.
Porous fibers have gained significant attention for their lightweight and high porosity properties in applications such as insulation and filtration. However, the challenge remains in the development of cost-effective, high-performance, and industrially viable porous fibers. In this paper, porous fibers were fabricated through the melt spinning of an alkali soluble polyester (COPET)- CaCO masterbatch and PET slice. Controlled alkali and acid post-treatment techniques were employed to create porous structures within the fibers. The effects on the morphology, mechanical, thermodynamic, crystallinity, pore size, and thermal stability were investigated. The results indicate that the uniform dispersion of CaCO particles within the fiber matrix acts as nucleating agents during the granulation process, improving the thermal resistance and strength of the porous fiber. In addition, the porous fiber prepared by COPET/CaCO to PET with an 85/15 ratio and post-treated on 4% NaOH and 3% HCl exhibits a "spongy body" with uniformly small pores, favorable strength (2.71 cN/dtex), and elongation at break (47%).
多孔纤维因其在隔热和过滤等应用中的轻质和高孔隙率特性而备受关注。然而，在开发具有成本效益、高性能且在工业上可行的多孔纤维方面，挑战依然存在。本文通过将碱溶性聚酯（COPET）-碳酸钙母粒与聚酯切片进行熔融纺丝来制备多孔纤维。采用可控的碱处理和酸后处理技术在纤维内部形成多孔结构。研究了其对形态、力学、热力学、结晶度、孔径和热稳定性的影响。结果表明，碳酸钙颗粒在纤维基体中的均匀分散在造粒过程中起到成核剂的作用，提高了多孔纤维的耐热性和强度。此外，由比例为85/15的COPET/碳酸钙制成并在4%氢氧化钠和3%盐酸中进行后处理的多孔纤维呈现出具有均匀小孔的“海绵体”，具有良好的强度（2.71厘牛/分特）和断裂伸长率（47%）。
