Journal of Membrane Science & Technology

Membranes with CO2-selective transport channels

2^nd International Conference on Membrane Science and Technology

September 13-14, 2018 | London, UK

Michael D Guiver

Tianjin University, China

Keynote: J Membr Sci Technol

Abstract:

Intensive research effort has been focused on developing highly CO2-permeable membranes from polymers of intrinsic microporosity and other polymer-hybrid systems. Practical membranes rely on coating thin layers of these polymers on mechanically-robust supports. Deposition of 2D materials with tailored channels composed of CO2-selective interlayers onto commercial polysulfone membranes provide a practical solution to fabricating membranes with high CO2-permeance and CO2/ gas selectivity. The interlayer spacing between horizontally-aligned GO nanosheets can be accurately tailored using different methods. First, by covalently bonded borate groups by thermal crosslinking at different temperatures; higher temperatures led to more crosslinking, thus controlling and narrowing the interspace distance. Borate in the inter-channel space allows reversible reactions with CO2, facilitating their transport. Furthermore, humidified feed gases interacting with the modified GO ensure sufficient water retention within the membrane channels. One B-GO membrane had a CO2 permeance of 650 GPU and CO2/ CH4 selectivity of 75, which is among the best performance reported for GO-based composite membranes using humidified feed gases. Using a different approach, gas separation membranes containing CO2-philic and non-CO2-philic nanodomains in the interlayer channels of graphene oxide (GO), were prepared by intercalating PEGDA. PEGDA reacts with epoxy groups on the GO surface, constructing CO2-philic nanodomains with high sorption capacity, whereas unreacted GO surfaces give non-CO2-philic nanodomains having low-friction diffusion. A GO-PEGDA500 membrane (PEGDA MW 500 daltons) had a CO2 permeance of 186 GPU and a CO2/CH4 selectivity of 67, which is amongst the highest performance reported for dry-state GO-stacking membranes. Apart from horizontally-aligned GO-layered membranes, we have also prepared vertically aligned channels using montmorillonite, which have high CO2 permeance and CO2/gas selectivity for both dry and humidified gas feeds. Recent Publications 1. Yin Y AND Guiver M D (2017) Ultrapermeable membranes. Nature Materials 16:880???881. 2. Wang S, Xie Y, He G, Xin Q, Zhang J, et al. (2017) Graphene oxide membranes with heterogeneous nanodomains for efficient CO2 separations. Angewandte Chemie Int. Ed. 56:14246???14251. 3. Qiao Z, Zhao S, Wang J, Wang S, Wang Z, et al. (2016) A highly permeable aligned montmorillonite mixed-matrix membrane for CO2 separation. Angewandte Chemie Int. Ed. 55:9321???9325. 4. Wang S, Li X, Wu H, Tian Z, Xin Q, et al. (2016) Advances in high permeability polymer-based membrane materials for CO2 separations. Energy & Environmental Science 9:1863???1890. 5. Wang S, Wu Y, Zhang N, He G, Xin Q, et al. (2016) A highly permeable graphene oxide membrane with fast and selective transport nanochannels for efficient carbon capture. Energy & Environmental Science 9:3107???3112.

Biography :

Michael D Guiver obtained his BSc (London University) and MSc (Carleton University) in Chemistry, and his PhD in Polymer Chemistry from Carleton University in 1988. He has been an Editor for the Journal of Membrane Science since 2009. He served on the Editorial Advisory Board for Macromolecules and ACS Macro Letters, from 2013–2015. He is a Fellow of the Royal Society of Chemistry, and is a Member of the International Advisory Board of the Barrer Centre, Imperial College, UK. He has published over 225 SCI articles and book chapters and holds about 25 patents and patent applications. From 1987–2014, he was a Scientist at the National Research Council Canada. In September 2014, he was appointed as a National 1000-Plan Foreign Experts Professor at the State Key Laboratory of Engines, Tianjin University. His research is in polymer electrolyte membranes for fuel cell applications and in microporous and other polymer membranes for gas separations.

E-mail: michael.guiver@outlook.com