Cover Image

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
http://eprints.usm.my/46185/
Tags: Add Tag
No Tags, Be the first to tag this record!
id my.usm.eprints.46185
record_format eprints
spelling my.usm.eprints.46185 http://eprints.usm.my/46185/ Synthesis And Characterization Of Superhydrophobic Alumina Membrane Via Chemical And Morphological Modification 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 NonPeerReviewed application/pdf en http://eprints.usm.my/46185/1/Nor%20Aini%20Ahmad24.pdf Ahmad, Nor Aini (2013) Synthesis And Characterization Of Superhydrophobic Alumina Membrane Via Chemical And Morphological Modification. Masters thesis, Universiti Sains Malaysia.
institution Universiti Sains Malaysia
building Hamzah Sendut Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Sains Malaysia
content_source USM Institutional Repository
url_provider http://eprints.usm.my/
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
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
publishDate 2013
url http://eprints.usm.my/46185/1/Nor%20Aini%20Ahmad24.pdf
http://eprints.usm.my/46185/
_version_ 1662755750409142272
score 13.211869

Similar Items