title: Electrospun nanofibrous chitosan membranes modified with polyethyleneimine for formaldehyde detection.
abstract: Here we describe a formaldehyde sensor fabricated by coating polyethyleneimine (PEI) functionalized chitosan nanofiber-net-binary structured layer on quartz crystal microbalance (QCM). The chitosan fibrous substrate comprising nanofibers and spider-web-like nano-nets constructed by a facile electro-spinning/netting process provided an ideal structure for the uniform PEI modification and sensing performance enhancement. Benefiting from the fascinating nanostructure, abundant primary amine groups of PEI, and strong adhesive force to the QCM electrode of PEI-chitosan membranes, the developed formaldehyde sensor presented rapid response and low detection limit (5 ppm) at room temperature. These findings have important implications in fabricating multi-dimensional nanostructures on QCM for gas sensing and chemical analysis.
authors.affiliation: State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China.
authors.forename: Na
authors.initials: N
authors.lastname: Wang
authors.affiliation: State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China.
authors.forename: Xianfeng
authors.initials: X
authors.lastname: Wang
authors.affiliation: College of Textiles and Clothing, Wuyi University, Jiangmen 529020, Guangdong, China.
authors.forename: Yongtang
authors.initials: Y
authors.lastname: Jia
authors.affiliation: College of Textiles, Donghua University, Shanghai 201620, China.
authors.forename: Xiaoqi
authors.initials: X
authors.lastname: Li
authors.affiliation: Nanomaterials Research Center, Modern Textile Institute, Donghua University, Shanghai 200051, China.
authors.forename: Jianyong
authors.initials: J
authors.lastname: Yu
authors.affiliation: State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China; Nanomaterials Research Center, Modern Textile Institute, Donghua University, Shanghai 200051, China. Electronic address: binding75@yahoo.com.
authors.forename: Bin
authors.initials: B
authors.lastname: Ding
mesh_terms: D048271:Chitosan / Q000737:chemistry*; D005557:Formaldehyde / Q000737:chemistry*; D008567:Membranes, Artificial; D049329:Nanostructures / Q000737:chemistry*; D011094:Polyethyleneimine / Q000737:chemistry*
chemical_list: D008567:Membranes, Artificial; D005557:Formaldehyde; D011094:Polyethyleneimine; D048271:Chitosan
keywords: Chitosan; Formaldehyde detection; Nanofiber-net-binary structure; Polyethyleneimine