EMS Webinar: June 5th, 2024, Development of Membranes for Environmental Protection, Prof. Chivukula Narayana Murthy

Title: Development of Membranes for Environmental Protection

Speaker: Prof. Chivukula Narayana Murthy, new President of the Indian Membrane Society

Abstract: Getting potable water is one of the UN declared sustainable development goals (SDG 6). Due to the higher energy costs per metric cube of clean water, desalination by reverse osmosis has been preferred over thermal desalination. Though polymeric membrane based treatment technologies using reverse osmosis are now well known and have reached homes across the world, both domestic and commercial applications of membranes for water and wastewater treatment require significant improvements in both the membrane materials as well as the technologies that use these advanced membranes. It has been established that carbon nanotubes impart outstanding mechanical properties to polymeric materials into which they are dispersed. It is equally interesting when it has been shown that CNTs can transport water. Reports have shown that these CNTs impart selective separation when incorporated into polymers like polysulphones which form porous materials when they are cast from solution. Controlling the porosity is a challenge which ultimately determines the composite materials varied applications. The incorporation of functionalized multi-walled carbon nanotubes into this polymer matrix was shown to induce variations in many parameters one of them being the porosity [1]. Similarly functionalized single walled nanotubes alter the porosity and the resulting separating characteristics of membranes [2]. When analysed by small angle neutron scattering (SANS), these composite membranes show interesting pore structure [3,4]. These studies also highlight that nanotubes form linked channels as reflected in the very high pure water flux. Removal of heavy metals like Cr(VI) from waste-water was efficient, the composite membranes showing removal capacities of >95%. Studies using suitable chemistry not only change the bulk porosity but also the surface can be engineered [5,6]. This talk will explore some of the recent applications of CNT incorporated membranes.

1. Shah, P., Murthy, C. N. (2013) Studies on the porosity control of MWCNT/Polysulphone composite membranes and its effect on metal removal. J. Membr. Sci., 437, 90-98.
2. Gupta, S., Digvijay, Murthy, C. N.(2015) Metal Removal Studies by Composite Membrane of Polysulfone and Functionalized Single-Walled Carbon Nanotubes. Sep. Sci. Tech., 50(3), 421-429.
3. Mangukiya, S., Prajapati, S., Kumar, S., Aswal, V. K., Murthy, C. N.,(2016), Polysulfone-based composite membranes with functionalized carbon nanotubes show controlled porosity and enhanced electrical conductivity. J. App. Polym. Sci., 133 (32).
4. Km Nikita, Kumar,,S., Aswal, D. K., Kanchan, Murthy, C. N. (2019), Porous structure studies of the mixed matrix polymeric membranes of polyether sulfone incorporated with functionalized multiwalled carbon nanotubes. Desal. Water Treat., 146,29-38
5. Km Nikita, Ray, R., Aswal, V. K., Murthy, C. N., (2020), Surface modification of functionalized multiwalled carbon nanotubes containing mixed matrix membrane using click chemistry, J. Membr. Sci.. 596, (https://doi.org/10.1016/j.memsci.2019.117710)
6. Mistry, P., Murthy, C. N., (2023) Positively Charged Polysulphone and Polyether sulphone Mixed Matrix Membranes Modified with Polyethylenimine: Enhancing Heavy Metal Rejection and Antifouling Properties, ACS Environ. Sci. Tech. Water, 3 (12), 4168-4182.

Biography: Chivukula Narayana Murthy is a professor in the field of materials science, holding an MTech in Materials Science and a PhD from IIT Mumbai, which he completed in 1991. C. N. Murthy has received several notable professional distinctions. Since 2013, he has been a Fellow of the Gujarat Science Academy. He was also a Brain Pool Fellow with the Korea Research Foundation in 2015-16, where he spent a year on sabbatical. His international experience is further highlighted by his role as an INSA Visiting Fellow at the Gwangju Institute of Science and Technology in South Korea in 2007, a Visiting Professor at the Royal Institute of Technology in Stockholm, Sweden in 2005, and a Post-Doctoral Fellow at the Gwangju Institute of Science and Technology in South Korea. In terms of work experience, C. N. Murthy has balanced both industrial and academic roles. He worked with the multinational company Johnson and Johnson in their Permacel Division in Bombay as a Technical Services Executive from 1993 to 1996. On the academic front, he served as the Head and Dean of the Faculty of Technology & Engineering from 2021 to 2022. Murthy is actively involved in various professional bodies. He is the President of the Indian Membrane Society and a member of both the Society for Polymer Science India and the Indian Chemical Society.

His contributions to the field are also reflected in his patents, which include: a water-soluble cyclodextrin-fullerene complex and its preparation (Korean patent, 2005); a water-soluble fullerene-DNA conjugate and its preparation (Korean patent, 2005); polymer-coated metal oxide nanoparticles prepared by self-emulsion polymerization (Indian patent, 2023). He has led several research projects funded by prominent agencies like UGC, UGC-DAE, DST, CSIR, and DRDO. His research output includes around 60 publications in refereed journals and over 70 presentations at national and international conferences.  Furthermore, C. N. Murthy has been involved in international collaborations, notably with the India-Taiwan S&T Cooperation program from 2010 to 2013. His extensive experience and contributions have made him a respected figure in the field of materials science.

Time: 5th June 2024, 4:00 pm (CET time)

Location:  our EMS Youtube channel, https://www.youtube.com/channel/UCBzUqWLIW-VXIDGLgI8QpiA



List of the previous EMS webinars: https://www.emsoc.eu/ems-webinars/