Liu Yaohui, Wang Yanming, Lee Cheng-Hao, Kan Chi-Wai, Lu Xiaoying
Faculty of Science and Technology, Technological and Higher Education Institute of Hong Kong, Tsing Yi, New Territories, Hong Kong, China.
School of Fashion and Textiles, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China.
Polymers (Basel). 2024 Jan 4;16(1):154. doi: 10.3390/polym16010154.
A large number of non-degradable materials have severely damaged the ecological environment. Now, people are increasingly pursuing the use of environmentally friendly materials to replace traditional chemical materials. Polyhydroxyalkonates (PHAs) are receiving increasing attention because of the unique biodegradability and biocompatibility they offer. However, the applications of PHAs are still limited due to high production costs and insufficient study. This project examines the optimal electrospinning parameters for the production of PHA-based fibrous membranes for air filtration. A common biodegradable polyester, Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV), was electrospun into a nanofibrous membrane with a well-controlled surface microstructure. In order to produce smooth, bead-free fibers with micron-scale diameters, the effect of the process parameters (applied electric field, solution flow rate, inner diameter of hollow needle, and polymer concentration) on the electrospun fiber microstructure was optimized. The well-defined fibrous structure was optimized at an applied electric field of 20 kV, flow rate of 0.5 mL/h, solution concentration of 12 wt.%, and needle inner diameter of 0.21 mm. The morphology of the electrospun PHBV fibrous membrane was observed by scanning electron microscopy (SEM). Fourier transform infrared (FTIR) and Raman spectroscopy were used to explore the chemical signatures and phases of the electrospun PHBV nanofiber. The ball burst strength (BBS) was measured to assess the mechanical strength of the membrane. The small pore size of the nanofiber membranes ensured they had good application prospects in the field of air filtration. The particle filtration efficiency (PFE) of the optimized electrospun PHBV fibrous membrane was above 98% at standard atmospheric pressure.
大量不可降解材料已严重破坏了生态环境。如今，人们越来越追求使用环保材料来替代传统化学材料。聚羟基脂肪酸酯（PHA）因其独特的生物可降解性和生物相容性而受到越来越多的关注。然而，由于生产成本高和研究不足，PHA的应用仍然有限。本项目研究了用于生产空气过滤用PHA基纤维膜的最佳静电纺丝参数。一种常见的可生物降解聚酯，聚（3-羟基丁酸酯-co-3-羟基戊酸酯）（PHBV），被静电纺丝成具有良好控制的表面微观结构的纳米纤维膜。为了生产直径为微米级的光滑、无珠纤维，优化了工艺参数（施加电场、溶液流速、空心针内径和聚合物浓度）对静电纺丝纤维微观结构的影响。在施加电场为20 kV、流速为0.5 mL/h、溶液浓度为12 wt.%和针内径为0.21 mm的条件下，优化了明确的纤维结构。通过扫描电子显微镜（SEM）观察静电纺丝PHBV纤维膜的形态。利用傅里叶变换红外（FTIR）和拉曼光谱来探索静电纺丝PHBV纳米纤维的化学特征和相。测量了球爆强度（BBS）以评估膜的机械强度。纳米纤维膜的小孔径确保了它们在空气过滤领域具有良好的应用前景。优化后的静电纺丝PHBV纤维膜在标准大气压下的颗粒过滤效率（PFE）高于98%。
