College of Chemistry and Materials Science, Jinan University, Guangzhou, Guangdong 511436, China.
Engineering Centre of Artificial Organs and Materials, Ministry of Education, Guangzhou, Guangdong 510632, China.
J Mater Chem B. 2023 Jul 19;11(28):6603-6611. doi: 10.1039/d3tb00659j.
Volatile organic compounds (VOCs) are one of the most common air pollutants, which threaten human health seriously. Fibrous textile is one of the most popular matrices for VOC removal in daily life. In this study, biosafe cyclodextrin metal-organic framework/polycaprolactone (CD-MOF/PCL) electrospun fibers were prepared a CD precursor doping method, followed by hydrothermal treatment in methanol vapor diffusion. CD-MOF crystals with a high loading of more than 50 wt% densely covered the surface of the electrospun fibers. The CD-MOF/PCL composite fibers show similar stress-strain behavior to the electrospun PCL fibers. The analysis of the fractured zone indicated that the compatibility of CD-MOF/PCL fibers was excellent, and CD-MOF showed no obvious peeling-off, even at low temperatures. The hemolysis rate of less than 1% confirms the biosafety of the composite materials. Further, the CD-MOF crystals anchored onto the fibers promote their VOC uptakes significantly. The CD-MOF/PCL fibrous matrix, which demonstrated compatibility, excellent strength, and biosafety would be beneficial to develop novel equipment to purify air pollution.
挥发性有机化合物（VOCs）是最常见的空气污染物之一，严重威胁着人类健康。纤维纺织品是日常生活中去除 VOC 的最常用基质之一。在这项研究中，采用 CD 前体掺杂法制备了生物安全的环糊精金属有机骨架/聚己内酯（CD-MOF/PCL）静电纺纤维，然后在甲醇蒸汽扩散中进行水热处理。负载量超过 50wt%的 CD-MOF 晶体密集覆盖在静电纺纤维的表面。CD-MOF/PCL 复合纤维表现出与静电纺 PCL 纤维相似的应力-应变行为。对断裂区的分析表明，CD-MOF/PCL 纤维的相容性很好，即使在低温下，CD-MOF 也没有明显的剥落。溶血率低于 1%，证实了复合材料的生物安全性。此外，固定在纤维上的 CD-MOF 晶体显著提高了它们对 VOC 的吸收能力。具有相容性、优异强度和生物安全性的 CD-MOF/PCL 纤维基质将有利于开发新型净化空气污染的设备。
