【20th.July】基于纳米技术的超强吸水橡胶
日期：2018-07-20
阅读：546
题目：基于纳米技术的超强吸水橡胶
Water-swellable rubber with nanotechnology-enabled super capacity
演讲人：唐友宏，Associate Professor, Flinders University, Australia.
时间：7月20日（星期五），上午10:00-11:30
地点：化学楼A-518会议室
邀请人：张永明 教授、袁望章 副研究员
Abstract：
Water-swellable rubber (WSR) is widely used as sealing material, which can swell in water and stop water by means of elastic sealing. Both chemical grafting and physical mixing methods [1] can be used to prepare WSR, but the chemical method is more complicated and more environmentally unfriendly than the physical method. The super absorbent polymers (SAP) [2], possessing a high degree of absorption ability and absorbing rate, as well as stability, is mostly used as a filler to improve the absorption of WSR.
However, the hydrophilic super water-absorbent resin can easily break off from rubber networks during the process of water absorption due to the poor interfaces strength between them. To overcome these problems, a silica coupling agent was used as a compatibilizer [3] to increase the interactions between poly(acrylic acid) (PAA), a kind of SAP and PDMS rubber. Improved swelling and mechanical properties were achieved.
However, isolated SAPs were trapped within the rubber and water could not efficiently transfer between SAP particles in the rubber. Electrospinning of various multi-scaled hybrid fiber mats of crosslinked PAA with hyperbranched polymer (HB) and/or graphene oxide (GO) as water channels was performed to improve water absorption property and stability of WSR [4]. The PAA/SBS 3D-nanofibrous mats prepared with the double needle electrospinning method was settled in rubber as water channels to improve the absorption of WSR. The SBS fibres in mat enhanced the interface force between rubber and PAA. Meanwhile, the isolated SAPs were trapped within the rubber by the fibrous mats and water could efficiently transfer between SAP particles and PAA fibres in the WSR [5]. HB or/and GO were used to synthesize PAA-based hybrid hydrogels with high water absorption ability and excellent mechanical properties [6], which also provides an alternative way to potentially enhance mechanical properties and water swelling abilities of WSR.
1. N. Dehbari and Y. Tang, J Appl Polym Sci 132, DOI: 10.1002/APP.42786 (2015)
2. M.J. Zohuriaan-Mehr and K. Kabiri, Iran Polym J 17, 451 (2008)
3. N. Dehbari, J. Zhao, R. Peng, Y. Tang, J Mater Sci 50, 5157 (2015)
4. J. Zhao, N. Dehbari, W. Han, L. Huang, Y. Tang, Mater Des 86, 14 (2015)
5. J. Zhao, N. Dehbari, Y. Tang. Proceeding of ICONN (2016)
6. Y. Yu, L.C.X. De Andrade, L. Fang, J. Ma, W. Zhang, Y. Tang, J Mater Sci 50, 3457 (2015)
报告人简介：
Youhong Tang is an Associate Professor in Material Engineering (Excellence in Research for Australia (ERA) ranking 4 in Materials Engineering), Flinders University, Australia.
He is also a Research Leader in Institute for NanoScale Science and Technology (ERA ranking 5 in Nanotechnology) and Medical Device Research Institute (ERA ranking 4 in Biomedical Engineering).
He was an Australian Research Council- Discovery Early Career Researcher Award (ARC-DECRA, Equivalent to NSFC for Excellent Young Scholars in China), 2012-2014, Australia. Dr Tang obtained his PhD in the Hong Kong University of Science and Technology in 2007, after finished his post-doc in the same university, he was appointed as an Associate Professor in South China University of Technology in 2009.
He was a Research Fellow in The University of Sydney in 2011, where he was awarded the prestigious ARC-DECRA and moved to Flinders University in 2012.
In the past 5 years, Dr Tang published 1 book, 8 book chapters and more than 130 SCI journal papers (including 7 reviewer papers) with citation > 3900 (citations >100 for 7 papers) and IF=30. Meanwhile, within the last 5 years, he obtained 5 funds from ARC (similar like NSFC funds), 3 funds from South Australian government. 1 from ASTRI and a few from Flinders University with total amount > 4.5 million Australian dollars.
For the detail information, please refer to //www.flinders.edu.au/people/youhong.tang
