Surface modification and porosimetry of vertically aligned hexagonal mesoporous silica films
Surface modification and porosimetry of vertically aligned hexagonal mesoporous silica films
Mesoporous silica films with vertically aligned hexagonal pores have been produced via the electrochemically assisted surfactant assembly (EASA) method using cetyltrimethylammonium bromide (CTAB) surfactant. Mesoporous silica powder has also been synthesised using the same surfactant. The pore walls of the silica powder and films have been grafted with organosilane reagents. The size of the pore, degree of grafting and effect on the properties of the pore have been investigated using porosimetry, contact angle, NMR and CHN analysis. The degree of grafting was found to be dependent upon the size of the grafting agent, with the smallest steric bulk grafting most effectively. It was found that that the grafting of the pores with Me3SiCl greatly increased the hydrophobicity of the pore and reduced water penetration. Grafting with larger groups caused the film surface to be hydrophobic but had little effect on the penetration of water into the pores.
113432-113441
Robertson, Calum
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Lodge, Andrew W.
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Basa, Peter
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Carravetta, Marina
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Hector, Andrew L.
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Kashtiban, Reza Jalili
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Sloan, Jeremy
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Smith, David C.
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Spencer, Joseph
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Walcarius, Alain
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Robertson, Calum
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Lodge, Andrew W.
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Basa, Peter
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Carravetta, Marina
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Hector, Andrew L.
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Kashtiban, Reza Jalili
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Sloan, Jeremy
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Smith, David C.
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Spencer, Joseph
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Walcarius, Alain
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Robertson, Calum, Lodge, Andrew W., Basa, Peter, Carravetta, Marina, Hector, Andrew L., Kashtiban, Reza Jalili, Sloan, Jeremy, Smith, David C., Spencer, Joseph and Walcarius, Alain
(2016)
Surface modification and porosimetry of vertically aligned hexagonal mesoporous silica films.
RSC Advances, 6, .
(doi:10.1039/C6RA23059H).
Abstract
Mesoporous silica films with vertically aligned hexagonal pores have been produced via the electrochemically assisted surfactant assembly (EASA) method using cetyltrimethylammonium bromide (CTAB) surfactant. Mesoporous silica powder has also been synthesised using the same surfactant. The pore walls of the silica powder and films have been grafted with organosilane reagents. The size of the pore, degree of grafting and effect on the properties of the pore have been investigated using porosimetry, contact angle, NMR and CHN analysis. The degree of grafting was found to be dependent upon the size of the grafting agent, with the smallest steric bulk grafting most effectively. It was found that that the grafting of the pores with Me3SiCl greatly increased the hydrophobicity of the pore and reduced water penetration. Grafting with larger groups caused the film surface to be hydrophobic but had little effect on the penetration of water into the pores.
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Accepted/In Press date: 31 October 2016
e-pub ahead of print date: 11 November 2016
Organisations:
Electrochemistry, Quantum, Light & Matter Group
Identifiers
Local EPrints ID: 402807
URI: http://eprints.soton.ac.uk/id/eprint/402807
ISSN: 2046-2069
PURE UUID: d81869bc-0516-4679-9f7c-e8fb04813da5
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Date deposited: 15 Nov 2016 16:17
Last modified: 16 Mar 2024 03:29
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Author:
Calum Robertson
Author:
Andrew W. Lodge
Author:
Peter Basa
Author:
Reza Jalili Kashtiban
Author:
Jeremy Sloan
Author:
Joseph Spencer
Author:
Alain Walcarius
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