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Effects of PVA, agar contents, and irradiation doses on properties of PVA/ws-chitosan/glycerol hydrogels made by gamma-irradiation followed by freeze-thawing
Yang, XM; Zhu, ZY; Liu, Q; Chen, XL; Ma, MW; Zhu, ZY (reprint author), Chinese Acad Sci, Shanghai Inst Appl Phys, POB 800-204, Shanghai 201800, Peoples R China
2008
Source PublicationRADIATION PHYSICS AND CHEMISTRY
ISSN0969-806X
Volume77Issue:8Pages:954
AbstractPoly(vinyl alcohol) (PVA)/water soluble chitosan (ws-chitosan)/glycerol hydrogels were prepared by gamma-irradiation and gamma-irradiation followed by freeze-thawing, respectively. The effects of irradiation dose and the contents of PVA and agar on the swelling, rheological, and thermal properties of these hydrogels were investigated. The swelling capacity decreases while the mechanical strength increases with increasing PVA or agar content. Increasing the irradiation dose leads to an increase in chemical crosslinking density but a decrease in physical crosslinking density. Hydrogels made by irradiation followed by freeze-thawing own smaller swelling capacity but larger mechanical strength than those made by pure irradiation. The storage modulus of the former hydrogels decreases above 50 degrees C and above 70 degrees C it comes to the same value as that prepared by irradiation. The ordered association of PVA is influenced by both chemical and physical crosslinkings and by the presence of ws-chitosan and glycerol. These hydrogels are high sensitive to pH and ionic strength, indicating that they may be useful in stimuli-responsive drug release system. (C) 2008 Elsevier Ltd. All rights reserved.
Subject AreaMicroscopy
Indexed BySCI
Language英语
Funding Project应物所项目组
WOS IDWOS:000257600800006
Citation statistics
Cited Times:41[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/7711
Collection中科院上海应用物理研究所2004-2010年
Corresponding AuthorZhu, ZY (reprint author), Chinese Acad Sci, Shanghai Inst Appl Phys, POB 800-204, Shanghai 201800, Peoples R China
Recommended Citation
GB/T 7714
Yang, XM,Zhu, ZY,Liu, Q,et al. Effects of PVA, agar contents, and irradiation doses on properties of PVA/ws-chitosan/glycerol hydrogels made by gamma-irradiation followed by freeze-thawing[J]. RADIATION PHYSICS AND CHEMISTRY,2008,77(8):954.
APA Yang, XM,Zhu, ZY,Liu, Q,Chen, XL,Ma, MW,&Zhu, ZY .(2008).Effects of PVA, agar contents, and irradiation doses on properties of PVA/ws-chitosan/glycerol hydrogels made by gamma-irradiation followed by freeze-thawing.RADIATION PHYSICS AND CHEMISTRY,77(8),954.
MLA Yang, XM,et al."Effects of PVA, agar contents, and irradiation doses on properties of PVA/ws-chitosan/glycerol hydrogels made by gamma-irradiation followed by freeze-thawing".RADIATION PHYSICS AND CHEMISTRY 77.8(2008):954.
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