Preparation and Properties of Chitosan with Silica Nanocomposites Membrane
碩士 === 國立宜蘭大學 === 化學工程與材料工程學系碩士班 === 99 === In this study we used chemical modification approach to prepare organic/inorganic hybrid materials. The procedure employed the precursor tetraethylorthosilicate (TEOS) by sol-gel process under alkaline environment to form silica. Secondly we used the diffe...
| Main Authors: | , |
|---|---|
| Other Authors: | |
| Format: | Others |
| Language: | zh-TW |
| Published: |
2011
|
| Online Access: | http://ndltd.ncl.edu.tw/handle/42578575076968258127 |
| Summary: | 碩士 === 國立宜蘭大學 === 化學工程與材料工程學系碩士班 === 99 === In this study we used chemical modification approach to prepare
organic/inorganic hybrid materials. The procedure employed the precursor
tetraethylorthosilicate (TEOS) by sol-gel process under alkaline environment to
form silica. Secondly we used the different coupling reagents of glycidoxy
-propyltriethoxysilane (APTES) and 3-Glycidoxy-propyl-trimethoxysilane
(GPTMS) to react with polystyrene-co-maleic acid (PSSA_MA) and then
followed by grafting onto silica. Finally, we incorporated modified silica into
chitosan to make chitosan-silica porous hybrid membranes with NaCl (porogen).
The particle-size distubution of silica could be measured from laser analyzer.
Also the size of about 200 nm could be confirmed through Transmission
electron microscopy (TEM). The organo-functionalized silica was confirmed to
be grafted onto silica from Fourier transform infrared spectroscopy (FTIR) and
Nuclear magnetic resonance (NMR). In the TGA analysis the grafting ratio of
PSSA_MA-APTES-Silica grafting ratio of 8.5 %, was more than
PSSA_MA-GPTMS-Silica 5.4 %.
|
|---|