Formaldehyde sensors based on nanofibrous polyethyleneimine/bacterial cellulose membranes coated quartz crystal microbalance |
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| Authors: | Weili HuAuthor VitaeShiyan ChenAuthor Vitae Luting LiuAuthor VitaeBin DingAuthor Vitae Huaping WangAuthor Vitae |
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| Affiliation: | a State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, The Key Laboratory of High-performance Fiber and Product, Ministry of Education, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China
b Nanomaterials Research Center, Modern Textile Institute, Donghua University, Shanghai 200051, China |
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| Abstract: | A novel formaldehyde sensor based on nanofibrous polyethyleneimine (PEI)/bacterial cellulose (BC) membranes coated quartz crystal microbalance (QCM) has been successfully fabricated. The nanoporous three-dimensional PEI/BC membranes are composed of nanofibers with diameter of 30-60 nm. The sensor showed high sensitivity with good linearity and exhibited a good reversibility and repeatability towards formaldehyde in the concentration range of 1-100 ppm at room temperature. Moreover, the results showed that the sensing properties were mainly affected by the content of PEI component in nanofibrous membranes, concentration of formaldehyde and relative humidity. Additionally, the nanofibrous PEI/BC membrane coated QCM sensors exhibited a good selectivity to formaldehyde when tested with competing vapors. The simple and feasible method to prepare and coat the PEI/BC sensing membranes on QCM makes it promising for mass production at a low cost. |
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| Keywords: | Bacterial cellulose Polyethyleneimine Nanofibrous membrane Quartz crystal microbalance Formaldehyde Sensor |
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