Bioinspired Diatomite Membrane with Selective Superwettability for Oil/Water Separation

Abstract Membranes with selective superwettability for oil/water separation have received significant attention during the past decades. Hierarchical structures and surface roughness are believed to improve the oil repellency and the stability of Cassie-Baxter state. Diatoms, unicellular photosynthe...

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Autores principales:	Yu-Hsiang Lo, Ching-Yu Yang, Haw-Kai Chang, Wei-Chen Hung, Po-Yu Chen
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/f131ac6030ea4deb8b628128fcd97c3a
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spelling	oai:doaj.org-article:f131ac6030ea4deb8b628128fcd97c3a2021-12-02T16:06:08ZBioinspired Diatomite Membrane with Selective Superwettability for Oil/Water Separation10.1038/s41598-017-01642-22045-2322https://doaj.org/article/f131ac6030ea4deb8b628128fcd97c3a2017-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-01642-2https://doaj.org/toc/2045-2322Abstract Membranes with selective superwettability for oil/water separation have received significant attention during the past decades. Hierarchical structures and surface roughness are believed to improve the oil repellency and the stability of Cassie-Baxter state. Diatoms, unicellular photosynthetic algae, possess sophisticated skeletal shells (called frustules) which are made of hydrated silica. Motivated by the hierarchical micro- and nanoscale features of diatom, we fabricate a hierarchical diatomite membrane which consists of aligned micro-sized channels by the freeze casting process. The fine nano-porous structures of frustules are well preserved after the post sintering process. The bioinspired diatomite membrane performs both underwater superoleophobicity and superhydrophobicity under various oils. Additionally, we demonstrate the highly efficient oil/water separation capabililty of the membranes in various harsh environments. The water flux can be further adjusted by tuning the cooling rates. The eco-friendly and robust bioinspired membranes produced by the simple, cost-effective freeze casting method can be potentially applied for large scale and efficient oil/water separation.Yu-Hsiang LoChing-Yu YangHaw-Kai ChangWei-Chen HungPo-Yu ChenNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-11 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Yu-Hsiang Lo Ching-Yu Yang Haw-Kai Chang Wei-Chen Hung Po-Yu Chen Bioinspired Diatomite Membrane with Selective Superwettability for Oil/Water Separation
description	Abstract Membranes with selective superwettability for oil/water separation have received significant attention during the past decades. Hierarchical structures and surface roughness are believed to improve the oil repellency and the stability of Cassie-Baxter state. Diatoms, unicellular photosynthetic algae, possess sophisticated skeletal shells (called frustules) which are made of hydrated silica. Motivated by the hierarchical micro- and nanoscale features of diatom, we fabricate a hierarchical diatomite membrane which consists of aligned micro-sized channels by the freeze casting process. The fine nano-porous structures of frustules are well preserved after the post sintering process. The bioinspired diatomite membrane performs both underwater superoleophobicity and superhydrophobicity under various oils. Additionally, we demonstrate the highly efficient oil/water separation capabililty of the membranes in various harsh environments. The water flux can be further adjusted by tuning the cooling rates. The eco-friendly and robust bioinspired membranes produced by the simple, cost-effective freeze casting method can be potentially applied for large scale and efficient oil/water separation.
format	article
author	Yu-Hsiang Lo Ching-Yu Yang Haw-Kai Chang Wei-Chen Hung Po-Yu Chen
author_facet	Yu-Hsiang Lo Ching-Yu Yang Haw-Kai Chang Wei-Chen Hung Po-Yu Chen
author_sort	Yu-Hsiang Lo
title	Bioinspired Diatomite Membrane with Selective Superwettability for Oil/Water Separation
title_short	Bioinspired Diatomite Membrane with Selective Superwettability for Oil/Water Separation
title_full	Bioinspired Diatomite Membrane with Selective Superwettability for Oil/Water Separation
title_fullStr	Bioinspired Diatomite Membrane with Selective Superwettability for Oil/Water Separation
title_full_unstemmed	Bioinspired Diatomite Membrane with Selective Superwettability for Oil/Water Separation
title_sort	bioinspired diatomite membrane with selective superwettability for oil/water separation
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/f131ac6030ea4deb8b628128fcd97c3a
work_keys_str_mv	AT yuhsianglo bioinspireddiatomitemembranewithselectivesuperwettabilityforoilwaterseparation AT chingyuyang bioinspireddiatomitemembranewithselectivesuperwettabilityforoilwaterseparation AT hawkaichang bioinspireddiatomitemembranewithselectivesuperwettabilityforoilwaterseparation AT weichenhung bioinspireddiatomitemembranewithselectivesuperwettabilityforoilwaterseparation AT poyuchen bioinspireddiatomitemembranewithselectivesuperwettabilityforoilwaterseparation
_version_	1718385122610249728

Bioinspired Diatomite Membrane with Selective Superwettability for Oil/Water Separation

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