NDLI: Development of Hybrid and Templated Silica-P123 Membranes for Brackish Water Desalination

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Development of Hybrid and Templated Silica-P123 Membranes for Brackish Water Desalination

Content Provider	MDPI
Author	Elma, Muthia Mujiyanti, Dwi Rasy Ismail, Noor Maizura Bilad, Muhammad Roil Rahma, Aulia Rahman, Sazila Karina Fitriani, Fitriani Rakhman, Arief Rampun, Erdina Lulu Atika
Copyright Year	2020
Description	Water scarcity is still a pressing issue in many regions. The application of membrane technology through water desalination to convert brackish to potable water is a promising technology to solve this issue. This study compared the performance of templated TEOS-P123 and ES40-P123 hybrid membranes for brackish water desalination. The membranes were prepared by the sol–gel method by employing tetraethyl orthosilicate (TEOS) for the carbon-templated silica (soft template) and ethyl silicate (ES40) for the hybrid organo-silica. Both sols were templated by adding 35 wt.% of pluronic triblock copolymer (P123) as the carbon source. The silica-templated sols were dip-coated onto alumina support (four layers) and were calcined by using the RTP (rapid thermal processing) method. The prepared membranes were tested using pervaporation set up at room temperature (~25 °C) using brackish water (0.3 and 1 wt.%) as the feed. It was found that the hybrid membrane exhibited the highest specific surface area (6.72 m2·g−1), pore size (3.67 nm), and pore volume (0.45 cm3·g−1). The hybrid ES40-P123 was twice thicker (2 μm) than TEOS-P123-templated membranes (1 μm). Lastly, the hybrid ES40-P123 displayed highest water flux of 6.2 kg·m−2·h−1. Both membranes showed excellent robustness and salt rejections of >99%.
Starting Page	2644
e-ISSN	20734360
DOI	10.3390/polym12112644
Journal	Polymers
Issue Number	11
Volume Number	12
Language	English
Publisher	MDPI
Publisher Date	2020-11-10
Access Restriction	Open
Subject Keyword	Polymers Environmental Engineering Water Science and Technology Mesoporous Silica Rapid Thermal Processing Sol–gel Process Brackish Water Desalination
Content Type	Text
Resource Type	Article

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