聚氨酯负载二元氧化物复合纤维膜的制备及其对甲醛的氧化作用  

Preparation of polyurethane loadedd binary oxides composite nanofibrous membranes and their oxidation for formaldehyde

作　　者：闫佳琪 张逸凡 蔡圣涵 孙超钦 黄锋林 YAN Jiaqi;ZHANG Yifan;CAI Shenghan;SUN Chaoqin;HUANG Fenglin(Key Laboratory of Eco-Textiles,Ministry of Education,Jiangnan University,Wuxi 214122,Jiangsu,China)

机构地区：[1]江南大学教育部生态纺织品重点实验室,江苏无锡214122

出　　处：《精细化工》2022年第1期95-100,共6页Fine Chemicals

基　　金：江苏省重点研发项目(BE2017060);博士后特别资助项目(169483)。

摘　　要：通过溶胶-凝胶法制备二氧化钛(TiO_(2)),水热法制备γ型二氧化锰(γ-Mn O_(2)),以TiO_(2)/γ-Mn O_(2)/热塑性聚氨酯(TPU)作为溶质,N,N-二甲基甲酰胺作为溶剂,通过静电纺丝制得不同TiO_(2)和γ-Mn O_(2)掺杂量的复合纤维膜,在空气过滤的同时高效氧化甲醛。利用SEM、TEM、XRD、N_(2)物理吸脱附仪、FTIR和UV-Vis对复合纤维膜的形貌、结构和氧化性能进行表征。结果表明,温度为40℃,经碘钨灯可见光照射后,掺杂TiO_(2)和γ-Mn O_(2)的质量分数为8%的复合纤维膜具有最好的持续氧化活性,甲醛的转化率达到90%左右,可在低温空气过滤条件下实现负载少量氧化物的复合纤维膜高效氧化甲醛。Titania(TiO_(2))andγtype manganese dioxide(γ-MnO_(2))were prepared by sol-gel and hydrothermal techniques,respectively.Polyurethane(TPU)composite nanofiberous membranes with different doping amount of TiO_(2) andγ-MnO_(2) by electrospinning using TiO_(2),γ-MnO_(2) and thermoplastic polyurethane(TPU)as solute and N,N-dimethylformamide as solvent.The composite nanofiberous membranes were used to oxidize formaldehyde when the air was filtered.The morphology,structure and oxidation performance of composite fiber membranes were characterized by SEM,TEM,XRD,physical adsorption and desorption instrument,FTIR and UV-Vis.The results demonstrated that the composite nanofiberous membrane containing 8%(mass fraction)TiO_(2) andγ-MnO_(2) nanoparticles had the best oxidation activity at 40℃,and the formaldehyde conversion reached about 90%.The oxidation of formaldehyde could be efficiently catalyzed by a composite nanofiberous membrane loaded a little amount of oxides under low temperature air filtration.

关 键 词：静电纺丝 氧化物 空气过滤 氧化 甲醛 功能材料 

分 类 号：X511[环境科学与工程—环境工程] TQ340.64[化学工程—化纤工业]