Novel In-situ Precipitation Process to Engineer Low Permeability Porous Composite

Abstract Inspired by the natural precipitation of minerals in soil and rocks, a novel, simple and industrially scalable in-situ precipitation process to produce low permeability porous composites is presented. This process relies on capillary flow in wettable porous composites to absorb and store li...

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Main Authors:	Swambabu Varanasi, Uthpala Garusinghe, George P Simon, Gil Garnier, Warren Batchelor
Format:	article
Language:	EN
Published:	Nature Portfolio 2018
Subjects:	Medicine R Science Q
Online Access:	https://doaj.org/article/b5b15f0f32b3424baab80731c9e07f2a
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spelling	oai:doaj.org-article:b5b15f0f32b3424baab80731c9e07f2a2021-12-02T11:41:02ZNovel In-situ Precipitation Process to Engineer Low Permeability Porous Composite10.1038/s41598-018-28786-z2045-2322https://doaj.org/article/b5b15f0f32b3424baab80731c9e07f2a2018-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-28786-zhttps://doaj.org/toc/2045-2322Abstract Inspired by the natural precipitation of minerals in soil and rocks, a novel, simple and industrially scalable in-situ precipitation process to produce low permeability porous composites is presented. This process relies on capillary flow in wettable porous composites to absorb and store liquid. In this process, a porous composite first absorbs a salt solution, after which the composite is dipped in a second salt solution. Salts are selected such as they react to form an insoluble precipitate. As big pores absorb more liquid than small pores, the precipitated particles are formed specifically for each pore. In this paper, precipitation of CaCO3 nanoparticles in cellulose nanofibre (CNF) films was demonstrated as an example. Precipitation of 1 wt% of CaCO3 nanoparticles in the CNF film reduced the pore volume by 50%, without changing the density. This reduced the water vapour and oxygen transmission rates by one order of magnitude to 4.7 g/m2.day and 2.7 cc/m2.day, respectively. The barrier properties of in-situ precipitated composites showed superior performance to previously reported CNF films in literature. The concept is general and of very high industrial interest as it can easily be retrofitted to current continuous industrial processes.Swambabu VaranasiUthpala GarusingheGeorge P SimonGil GarnierWarren BatchelorNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-8 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Swambabu Varanasi Uthpala Garusinghe George P Simon Gil Garnier Warren Batchelor Novel In-situ Precipitation Process to Engineer Low Permeability Porous Composite
description	Abstract Inspired by the natural precipitation of minerals in soil and rocks, a novel, simple and industrially scalable in-situ precipitation process to produce low permeability porous composites is presented. This process relies on capillary flow in wettable porous composites to absorb and store liquid. In this process, a porous composite first absorbs a salt solution, after which the composite is dipped in a second salt solution. Salts are selected such as they react to form an insoluble precipitate. As big pores absorb more liquid than small pores, the precipitated particles are formed specifically for each pore. In this paper, precipitation of CaCO3 nanoparticles in cellulose nanofibre (CNF) films was demonstrated as an example. Precipitation of 1 wt% of CaCO3 nanoparticles in the CNF film reduced the pore volume by 50%, without changing the density. This reduced the water vapour and oxygen transmission rates by one order of magnitude to 4.7 g/m2.day and 2.7 cc/m2.day, respectively. The barrier properties of in-situ precipitated composites showed superior performance to previously reported CNF films in literature. The concept is general and of very high industrial interest as it can easily be retrofitted to current continuous industrial processes.
format	article
author	Swambabu Varanasi Uthpala Garusinghe George P Simon Gil Garnier Warren Batchelor
author_facet	Swambabu Varanasi Uthpala Garusinghe George P Simon Gil Garnier Warren Batchelor
author_sort	Swambabu Varanasi
title	Novel In-situ Precipitation Process to Engineer Low Permeability Porous Composite
title_short	Novel In-situ Precipitation Process to Engineer Low Permeability Porous Composite
title_full	Novel In-situ Precipitation Process to Engineer Low Permeability Porous Composite
title_fullStr	Novel In-situ Precipitation Process to Engineer Low Permeability Porous Composite
title_full_unstemmed	Novel In-situ Precipitation Process to Engineer Low Permeability Porous Composite
title_sort	novel in-situ precipitation process to engineer low permeability porous composite
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/b5b15f0f32b3424baab80731c9e07f2a
work_keys_str_mv	AT swambabuvaranasi novelinsituprecipitationprocesstoengineerlowpermeabilityporouscomposite AT uthpalagarusinghe novelinsituprecipitationprocesstoengineerlowpermeabilityporouscomposite AT georgepsimon novelinsituprecipitationprocesstoengineerlowpermeabilityporouscomposite AT gilgarnier novelinsituprecipitationprocesstoengineerlowpermeabilityporouscomposite AT warrenbatchelor novelinsituprecipitationprocesstoengineerlowpermeabilityporouscomposite
_version_	1718395481088851968

Novel In-situ Precipitation Process to Engineer Low Permeability Porous Composite

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