Fabrication and chemical crosslinking of electrospun trans-polyisoprene nanofiber nonwoven |
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Authors: | Hua-rong Nie Chao Wang Ai-hua He |
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Affiliation: | Shandong Provincial Key Laboratory of Olefin Catalysis and Polymerization, Key Laboratory of Rubber-Plastics(Ministry of Education), School of Polymer Science and Engineering, Qingdao University of Science and Technology,Qingdao 266042, China |
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Abstract: | In this work, the optimal electrospinning conditions of trans-polyisoprene (TPI) solutions were evaluated nevertheless its lower glass transition temperature than the room temperature. Subsequently, chemical crosslinking of TPI nonwovens was firstly investigated by vulcanizing at high temperatures in the case of the persistence of nanofiber structure. For this purpose, curing agents of TPI were embedded in TPI nanofibers by co-electrospinning, and then a protect layer was coated on TPI nanofibers by filtering gelatin solution going through TPI nonwoven before the vulcanization at 140?160 °C. The results showed that the vulcanization of TPI fibrous nonwoven at high temperatures did not destroy the fiber morphology. Interestingly, TPI fibrous nonwovens after vulcanization showed excellent mechanical properties (~17 MPa of tensile strength) that could be comparable to or even higher than that of some bulk rubber materials. |
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Keywords: | Trans-1,4-polyisoprene Electrospun nanofibers Gelatin Vulcanization Chemical crosslinking |
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