Development of hybrid and templated silica-P123 membranes for brackish water desalination
Elma, M.; Mujiyanti, D.R.; Ismail, N.M.; Bilad, M.R.; Rahma, A.; Rahman, S.K.; Fitriani, F.; Rakhman, A.; Rampun, E.L.A. (2020). Development of hybrid and templated silica-P123 membranes for brackish water desalination. Polymers 12(11): 2644. https://dx.doi.org/10.3390/polym12112644
In: Polymers. MDPI AG: Basel. e-ISSN 2073-4360, more
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| Keyword |
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| Author keywords |
mesoporous silica; rapid thermal processing; sol–gel process; brackish water desalination |
| Authors | | Top |
- Elma, M.
- Mujiyanti, D.R.
- Ismail, N.M.
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- Bilad, M.R.
- Rahma, A.
- Rahman, S.K.
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- Fitriani, F.
- Rakhman, A.
- Rampun, E.L.A.
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| Abstract |
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%. |
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