Synthesis And Characterization Of Superhydrophobic Alumina Membrane Via Chemical And Morphological Modification

Hydrophobicity is commonly known to have “water repellent” feature on a surface. Although ceramic membranes possess superior mechanical strength, excellent chemical resistance and great thermal stability, the natural hydrophilic feature of ceramic membranes limits their applications. Membrane modifi...

Full description

Saved in:

Bibliographic Details
Main Author:	Ahmad, Nor Aini
Format:	Thesis
Language:	English
Published:	2013
Subjects:	TH1-9745 Building construction
Online Access:	http://eprints.usm.my/46185/1/Nor%20Aini%20Ahmad24.pdf
Tags:	Add Tag No Tags, Be the first to tag this record!

id	my-usm-ep.46185
record_format	uketd_dc
spelling	my-usm-ep.461852020-02-12T04:40:56Z Synthesis And Characterization Of Superhydrophobic Alumina Membrane Via Chemical And Morphological Modification 2013-07 Ahmad, Nor Aini TH1-9745 Building construction Hydrophobicity is commonly known to have “water repellent” feature on a surface. Although ceramic membranes possess superior mechanical strength, excellent chemical resistance and great thermal stability, the natural hydrophilic feature of ceramic membranes limits their applications. Membrane modification by silane grafting has been widely reported due to its ease of handling, but the growth of hydrophobic structure introduces additional resistance in mass transfer. The major aim of this study is to synthesis superhydrophobic membrane with minimum membrane resistance. The effects of (heptadecafluoro-1,1,2,2-tetra hydrodecyl) triethoxysilane (HFDS) concentration on mass transfer resistance of superhydrophobic alumina membrane is studied as well. Besides direct grafting on membrane, HFDS was grafted on the additional thin alumina films prepared by sol-gel method with calcinations or steam treatment in order to reduce pore blockage. Alumina supports were first directly grafted with different volume ratios HFDS in ethanol (0.1-2.5 ml of HFDS:50 ml of ethanol). The HFDS grafted membranes showed static water contact angle in the range of 85.84 o (0.1ml of HFDS) to 138.91 o (1.0 ml of HFDS). The increment of HFDS concentration, however, caused membrane pore blockage due to the penetration of HFDS chain. 2013-07 Thesis http://eprints.usm.my/46185/ http://eprints.usm.my/46185/1/Nor%20Aini%20Ahmad24.pdf application/pdf en public masters Universiti Sains Malaysia Pusat Pengajian Perumahan, Banggunan & Perancangan
institution	Universiti Sains Malaysia
collection	USM Institutional Repository
language	English
topic	TH1-9745 Building construction
spellingShingle	TH1-9745 Building construction Ahmad, Nor Aini Synthesis And Characterization Of Superhydrophobic Alumina Membrane Via Chemical And Morphological Modification
description	Hydrophobicity is commonly known to have “water repellent” feature on a surface. Although ceramic membranes possess superior mechanical strength, excellent chemical resistance and great thermal stability, the natural hydrophilic feature of ceramic membranes limits their applications. Membrane modification by silane grafting has been widely reported due to its ease of handling, but the growth of hydrophobic structure introduces additional resistance in mass transfer. The major aim of this study is to synthesis superhydrophobic membrane with minimum membrane resistance. The effects of (heptadecafluoro-1,1,2,2-tetra hydrodecyl) triethoxysilane (HFDS) concentration on mass transfer resistance of superhydrophobic alumina membrane is studied as well. Besides direct grafting on membrane, HFDS was grafted on the additional thin alumina films prepared by sol-gel method with calcinations or steam treatment in order to reduce pore blockage. Alumina supports were first directly grafted with different volume ratios HFDS in ethanol (0.1-2.5 ml of HFDS:50 ml of ethanol). The HFDS grafted membranes showed static water contact angle in the range of 85.84 o (0.1ml of HFDS) to 138.91 o (1.0 ml of HFDS). The increment of HFDS concentration, however, caused membrane pore blockage due to the penetration of HFDS chain.
format	Thesis
qualification_level	Master's degree
author	Ahmad, Nor Aini
author_facet	Ahmad, Nor Aini
author_sort	Ahmad, Nor Aini
title	Synthesis And Characterization Of Superhydrophobic Alumina Membrane Via Chemical And Morphological Modification
title_short	Synthesis And Characterization Of Superhydrophobic Alumina Membrane Via Chemical And Morphological Modification
title_full	Synthesis And Characterization Of Superhydrophobic Alumina Membrane Via Chemical And Morphological Modification
title_fullStr	Synthesis And Characterization Of Superhydrophobic Alumina Membrane Via Chemical And Morphological Modification
title_full_unstemmed	Synthesis And Characterization Of Superhydrophobic Alumina Membrane Via Chemical And Morphological Modification
title_sort	synthesis and characterization of superhydrophobic alumina membrane via chemical and morphological modification
granting_institution	Universiti Sains Malaysia
granting_department	Pusat Pengajian Perumahan, Banggunan & Perancangan
publishDate	2013
url	http://eprints.usm.my/46185/1/Nor%20Aini%20Ahmad24.pdf
_version_	1747821628718317568

Synthesis And Characterization Of Superhydrophobic Alumina Membrane Via Chemical And Morphological Modification

Similar Items