PMID- 15244479
OWN - NLM
STAT- MEDLINE
DCOM- 20050209
LR  - 20131121
IS  - 1525-7797 (Print)
IS  - 1525-7797 (Linking)
VI  - 5
IP  - 4
DP  - 2004 Jul-Aug
TI  - Dehydration of an ethanol/water azeotrope by novel organic-inorganic hybrid 
      membranes based on quaternized chitosan and tetraethoxysilane.
PG  - 1567-74
AB  - To control swelling of quaternized chitosan (q-Chito) membranes, mixtures of 
      q-Chito as an organic component and tetraethoxysilane (TEOS) as an inorganic 
      component were prepared using the sol-gel reaction, and novel q-Chito/TEOS hybrid 
      membranes were formed. In the separation of an ethanol/water azeotrope by 
      pervaporation, the effect of TEOS content on the water/ethanol selectivity of 
      q-Chito/TEOS hybrid membranes was investigated. Hybrid membranes containing up to 
      45 mol % TEOS exhibited higher water/ethanol selectivity than the q-Chito 
      membrane. This resulted from depressed swelling of the membranes by formation of 
      a cross-linked structure. However, introduction of excess TEOS led to greater 
      swelling of the hybrid membranes. Therefore, the water/ethanol selectivity of the 
      hybrid membranes containing more than 45 mol % TEOS was lower than that of the 
      q-Chito membrane. The relationship between the structure of q-Chito/TEOS hybrid 
      membranes and their permeation and separation characteristics during 
      pervaporation of an ethanol/water azeotrope is discussed in detail.
FAU - Uragami, Tadashi
AU  - Uragami T
AD  - Faculty of Engineering and High Technology Research Center, Kansai University, 
      Suita, Osaka 564-8680, Japan.
FAU - Katayama, Takuya
AU  - Katayama T
FAU - Miyata, Takashi
AU  - Miyata T
FAU - Tamura, Hiroshi
AU  - Tamura H
FAU - Shiraiwa, Tadashi
AU  - Shiraiwa T
FAU - Higuchi, Akon
AU  - Higuchi A
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - United States
TA  - Biomacromolecules
JT  - Biomacromolecules
JID - 100892849
RN  - 0 (Membranes, Artificial)
RN  - 0 (Silanes)
RN  - 059QF0KO0R (Water)
RN  - 3K9958V90M (Ethanol)
RN  - 42064KRE49 (tetraethoxysilane)
RN  - 9012-76-4 (Chitosan)
SB  - IM
MH  - Carbohydrate Sequence
MH  - Chitosan/chemical synthesis/*chemistry
MH  - Desiccation/*methods
MH  - Ethanol/*chemistry
MH  - *Membranes, Artificial
MH  - Molecular Sequence Data
MH  - Silanes/*chemistry
MH  - Water/*chemistry
EDAT- 2004/07/13 05:00
MHDA- 2005/02/11 09:00
CRDT- 2004/07/13 05:00
PHST- 2004/07/13 05:00 [pubmed]
PHST- 2005/02/11 09:00 [medline]
PHST- 2004/07/13 05:00 [entrez]
AID - 10.1021/bm0498880 [doi]
PST - ppublish
SO  - Biomacromolecules. 2004 Jul-Aug;5(4):1567-74. doi: 10.1021/bm0498880.