Graphene coatings

Membrane fouling in reverse osmosis leads to a decrease in water purification and increase in costs for membrane cleaning[1]. Feed spacers ensure a separation of the membrane layers but are also susceptible to fouling[2]. Thus, modification of feed spacers is needed. Especially graphene, as an exciting new material, is an sp2-hybridized carbon allotrope[3] which has been intensively studied. Due to its extraordinary chemical, physical, mechanical and electrical properties[3,4], there is much interest in surface applications. Laser-induced graphene (LIG) can be easily generated on different polymer surfaces, using a CO2 laser in an environmentally friendly and cost efficient manner[5,6]. We challenge different modified surfaces against marine organisms, to test their antifouling behavior.

Collaborations : Prof. Arnusch, Ben-Gurion University of the Negev, Israel

Students working on this project: Emily Manderfeld

[1] Ahmed, F. E., Lalia, B. S., Hilal, N. & Hashaikeh, R. Electrically conducting nanofiltration membranes based on networked cellulose and carbon nanostructures. Desalination 406, 60–66 (2017). DOI:10.1016/j.desal.2016.09.005

[2] Kim, Y. C. & Elimelech, M. Adverse impact of feed channel spacers on the performance of pressure retarded osmosis. Environ. Sci. Technol. 46, 4673–4681 (2012). DOI: 10.1021/es3002597

[3] Singh, S. P. et al. Laser-Induced Graphene Layers and Electrodes Prevents Microbial Fouling and Exerts Antimicrobial Action. ACS Appl. Mater. Interfaces 9, 18238–18247 (2017). DOI: 10.1021/acsami.7b04863

[4] AK Geim. The rise of graphene. 183–191 (2007). DOI: 10.1038/nmat1849

[5] Chyan, Y. et al. Laser-Induced Graphene by Multiple Lasing: Toward Electronics on Cloth, Paper, and Food. ACS Nano 12, 2176–2183 (2018). DOI: 10.1021/acsnano.7b08539

[6] Singh, S. P., Li, Y., Zhang, J., Tour, J. M. & Arnusch, C. J. Sulfur-Doped Laser-Induced Porous Graphene Derived from Polysulfone-Class Polymers and Membranes. ACS Nano 12, 289–297 (2018). DOI: 10.1021/acsnano.7b06263