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    Surface modification of thin film composite polyamide membrane using atomic layer deposition method

    Year: 2014

    Journal: JOURNAL OF MEMBRANE SCIENCE, Vol. 450, p 174-180, 20150722

    Authors: Nikkola, Juha; Sievanen, Jenni; Raulio, Mari; Wei, Jing; Vuorinen, Jyrki; Tang, Chuyang Y.

    Organizations: VVT Tech Res Ctr Finland, Tampere 33101, Finland; VVT Tech Res Ctr Finland, Espoo 02044, Finland; Nanyang Technol Univ, Sch Civil & Environm Engn, Singapore 639798, Singapore; Nanyang Technol Univ, Singapore Membrane Technol Ctr, Singapore 639798, Singapore; Tampere Univ Technol, Dept Mat Sci, FIN-33101 Tampere, Finland

    We present surface modification of thin-film-composite (TFC) polyamide (PA) reverse osmosis (RO) membrane by atomic layer deposition (ALD) process using trimethylaluminium (AlMe3). The aim of the inorganic ALD coating is to improve the anti fouling performance of TFC PA membranes. The ALD processing parameters were systematically studied because of the lack of previous investigations of the ALD coated RO membranes. Two different processing temperatures (70 degrees C and 100 degrees C) and three different ALD cycles (10, 50 and 100) were used to deposit the Al2O3 ALD coatings on TFC PA membranes. The ALD process parameters affected on the hydrophilicity and the surface polarity as well as on the surface roughness of the coated membranes. The bacteria attachment Lest results indicated that the lowest number of Pseudomonas aeruginosa cells was adhered on the most hydrophilic and polar surface, among the ALD coated membranes. RO tests showed the effect of ALD coating on the water and salt permeability as well as On the salt rejection of the membranes. (C) 2013 Elsevier By. All rights reserved.