【作者】 胡敏； 康卫民； 程博闻；

【Author】 Min Hu;Weimin Kang;Bowen Cheng;School of Textile, Tianjin Polytechnic University;

【机构】 天津工业大学纺织学院；

【摘要】 采用静电纺丝技术简单、有效地制备了聚乳酸、聚苯乙烯等纳米多孔纤维材料,并负载卟啉类化合物,用于检测有毒气体。场发射扫描电镜(FESEM)图显示四苯基卟啉-聚乳酸(TPPH2-PLA)纳米多孔纤维上均匀分布了平均直径为100 nm左右的孔,孔隙率接近50%。激光共聚焦显微镜(CLSM)图显示了TPPH2均匀分散在PLA纳米多孔纤维的表面。利用紫外-可见吸收光谱和荧光发射光谱对TPPH2-PLA纳米多孔纤维材料的气敏性能进行表征。结果表明,TPPH2-PLA纳米多孔纤维材料对sub-ppm级别的氯化氢气体具有高灵敏性以及快速响应性,检测限为34 ppb,5 s内即可达到最大灵敏度。重复的气体检测实验表明,TPPH2-PLA纳米多孔纤维材料的气体传感性能非常稳定,且可重复使用。这一研究为开发监测有毒气体的智能服装或家纺产品提供了有利条件。更多还原

【Abstract】 Porphyrin based nanoporous fiber membrane(NFM) was prepared by electrospinning method. This membrane exhibit characteristic intense optical absorption bands in the region 400-700 nm and fluorescence emission bands in the region 600-760 nm. The effects of exposure to different toxic gases such as hydrogen chloride, ammonia, VOCs etc. on the optochemical properties of NFMs have been studied. A highly sensitivity and fast responsehas been observed due to abundant interconnected nanoporous structure on the NFM and hence higher specific surface area, better gas absorption and diffusion. Repeated gas sensing experiments have shown that the performance of the porphyrin based NFM sensor is highly stable and the response is fully reversible.更多还原