Shihong Lin
Vanderbilt University
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Publication
Featured researches published by Shihong Lin.
Environmental Science & Technology | 2016
Zhangxin Wang; Deyin Hou; Shihong Lin
In this study, we fabricated a composite membrane for membrane distillation (MD) by modifying a commercial hydrophobic polyvinylidene fluoride (PVDF) membrane with a nanocomposite coating comprising silica nanoparticles, chitosan hydrogel and fluoro-polymer. The composite membrane exhibits asymmetric wettability, with the modified surface being in-air hydrophilic and underwater oleophobic, and the unmodified surface remaining hydrophobic. By comparing the performance of the composite membrane and the pristine PVDF membrane in direct contact MD experiments using a saline emulsion with 1000 ppm crude oil (in water), we showed that the fabricated composite membrane was significantly more resistant to oil fouling compared to the pristine hydrophobic PVDF membrane. Force spectroscopy was conducted for the interaction between an oil droplet and the membrane surface using a force tensiometer. The difference between the composite membrane and the pristine PVDF membrane in their interaction with an oil droplet served to explain the difference in the fouling propensities between these two membranes observed in MD experiments. The results from this study suggest that underwater oleophobic coating can effectively mitigate oil fouling in MD operations, and that the fabricated composite membrane with asymmetric wettability can enable MD to desalinate hypersaline wastewater with high concentrations of hydrophobic contaminants.
Environmental Science & Technology | 2017
Yu-Xi Huang; Zhangxin Wang; Jian Jin; Shihong Lin
A novel Janus membrane integrating an omniphobic substrate and an in-air hydrophilic, underwater superoleophobic skin layer was developed to enable membrane distillation (MD) to desalinate hypersaline brine with both hydrophobic foulants and amphiphilic wetting agents. Engineered to overcome the limitations of existing MD membranes, the Janus membrane has been shown to exhibit novel wetting properties unobserved in any existing membrane, including hydrophobic membranes, omniphobic membranes, and hydrophobic membranes with a hydrophilic surface coating. Being simultaneously resistant to both membrane fouling and wetting, a Janus membrane can sustain stable MD performance even with challenging feed waters and can thus potentially transform MD to be a viable technology for desalinating hypersaline wastewater with complex compositions using low-grade-thermal energy.
Journal of Membrane Science | 2016
Zhangxin Wang; Jian Jin; Deyin Hou; Shihong Lin
Journal of Membrane Science | 2017
Anne Bogler; Shihong Lin; Edo Bar-Zeev
Journal of Membrane Science | 2017
Zhangxin Wang; Shihong Lin
Journal of Membrane Science | 2017
Yu-Xi Huang; Zhangxin Wang; Deyin Hou; Shihong Lin
Journal of Membrane Science | 2016
Zhangxin Wang; Deyin Hou; Shihong Lin
Journal of Membrane Science | 2016
Shihong Lin
Journal of Membrane Science | 2018
Deyin Hou; Zhangxin Wang; Kunpeng Wang; Jun Wang; Shihong Lin
Journal of Membrane Science | 2018
Zhangxin Wang; Yuanmiaoliang Chen; Xiangming Sun; Ravindra Duddu; Shihong Lin