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Thermal and rheological properties of poly(vinyl alcohol) and water-soluble chitosan hydrogels prepared by a combination of gamma-ray irradiation and freeze thawing
Yang, XM(杨小敏); Zhu, ZY(朱智勇); Liu, Q; Chen, XL; Zhu, ZY (reprint author), Chinese Acad Sci, Shanghai Inst Appl Phys, POB 800-204, Shanghai 201800, Peoples R China
2008
Source PublicationJOURNAL OF APPLIED POLYMER SCIENCE
ISSN0021-8995
Volume109Issue:6Pages:3825
AbstractPoly(vinyl alcohol) (PVA)/water-soluble chitosan (ws-chitosan) hydrogels were prepared by a combination of gamma-irradiation and freeze thawing. The thermal and rheological properties of these hydrogels were compared with those of hydrogels prepared by pure irradiation and pure freeze thawing. Irradiation reduced the crystallinity of PVA, whereas freeze thawing increased it. Hydrogels made by freeze thawing followed by irradiation had higher degrees of crystallinity and higher melting temperatures than those made by irradiation followed by freeze thawing. ws-Chitosan disrupted the ordered association of PVA molecules and decreased the thermal stability of both physical blends and hydrogels. All the hydrogels showed shear-thinning behavior in the frequency range of 0.2-100 rad/s. Hydrogels made by freeze thawing dissolved into sol solutions at about 80 degrees C, whereas those made by irradiation showed no temperature dependence up to 100 degrees C. The chemical crosslinking density of the hydrogels made by irradiation followed by freeze thawing was much greater than that of hydrogels made by freeze thawing followed by irradiation. (c) 2008 Wiley Periodicals, Inc. J Appl Polym Sci 109: 3825-3830,2008.
Subject AreaElectrochemistry
Indexed BySCI
Language英语
Funding Project应物所项目组
WOS IDWOS:000257724900050
Citation statistics
Cited Times:17[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/7864
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. Thermal and rheological properties of poly(vinyl alcohol) and water-soluble chitosan hydrogels prepared by a combination of gamma-ray irradiation and freeze thawing[J]. JOURNAL OF APPLIED POLYMER SCIENCE,2008,109(6):3825.
APA Yang, XM,Zhu, ZY,Liu, Q,Chen, XL,&Zhu, ZY .(2008).Thermal and rheological properties of poly(vinyl alcohol) and water-soluble chitosan hydrogels prepared by a combination of gamma-ray irradiation and freeze thawing.JOURNAL OF APPLIED POLYMER SCIENCE,109(6),3825.
MLA Yang, XM,et al."Thermal and rheological properties of poly(vinyl alcohol) and water-soluble chitosan hydrogels prepared by a combination of gamma-ray irradiation and freeze thawing".JOURNAL OF APPLIED POLYMER SCIENCE 109.6(2008):3825.
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