A facile method for fabrication of moisture-sensitive porous membrane with on-off function |
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| Authors: | Fei Song Jintu Fan |
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| Affiliation: | a Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, Chinab Center for Degradable and Flame-Retardant Polymeric Materials, College of Chemistry, State Key Laboratory of Polymer Materials Engineering, National Engineering Laboratory of Eco-Friendly Polymeric Materials (Sichuan), Sichuan University, Chengdu 610064, China |
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| Abstract: | In the present work, a facile method is presented for fabrication of moisture sensitive porous polyurethane (PU) membranes with on-off function. A kind of supramolecular hydrogel precursor, never used as pore filling agent before, was firstly formed by the inclusion complexation of PEG diacrylate (PEGDA) with α-cyclodextrin (α-CD) and subsequently in-situ UV photo-cross-linked in pores of the PU membranes. The moisture sensitive property of the supramolecular hydrogels was related to the amount of α-CD added as well as the environmental relative humidity. Especially, the controlled on-off function of the hydrogel-containing porous PU membrane was confirmed from the results of microscopic observation. |
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| Keywords: | Porous polyurethane membrane Supramolecular hydrogel Moisture sensitive On-off function |
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