Journal of Membrane Science & Technology

Construction of antimicrobial membrane with capsaicin-mimic moieties for efficient water

2^nd International Conference on Membrane Science and Technology

September 13-14, 2018 | London, UK

Jia Xu

Ocean University of China, China

Posters & Accepted Abstracts: J Membr Sci Technol

Abstract:

Capsaicin, the main active component of chili peppers, and its derivatives are natural anti-fungal and anti-bacterial agents, which can be promising candidates for antifouling membrane fabrication. A series of novel antimicrobial membranes incorporated capsaicin-mimic materials are reported here. The resulting membranes exhibited excellent antimicrobial activity and the anti-fouling characteristics. By exquisitely manipulating the copolymer composition of capsaicin-mimic moieties and micro-phase separation during the commonly utilized blending-wet phase inversion membrane-formation process, the water flux can be significantly improved without sacrificing the rejection when treating raw seawater for a relatively long testing time. More importantly, an ???in situ polymerization-blending??? technique was developed to prepare capsaicin-containing membranes. This facile one-pot synthesis applied a capsaicin derivative (HMDA) containing two carbon???carbon double bonds. The presence of carbon???carbon double bonds enabled the self-polymerization of HMDA, leading to stable anchoring of the capsaicin derivative on the membrane. The composite membrane exhibited higher pure water permeability (over two times higher than that of the pure membrane) without compromising the humic acid rejection efficiency. In addition, the membranes also exhibited significantly improved resistance to organic fouling (humic acid) and bacteria (E. coli)/algae (Prorocentrum donghaiense) growth. The presence of unreacted carbon???carbon double bonds on HMDA also allowed gradual polymerization when exposed chronically to air or water environments, which ensured good operational stability over 2 months. These novel membranes and their fabrication techniques in this work offer significant opportunities to exploit the unique properties of capsaicin derivatives in the fabrication of various separation membranes.

Biography :

E-mail: jiapipi2@163.com