Thermal and rheological properties of poly(vinyl alcohol) and water-soluble chitosan hydrogels prepared by a combination of gamma-ray irradiation and freeze thawing

CORC > 上海应用物理研究所 > 中国科学院上海应用物理研究所 > 中科院上海应用物理研究所2004-2010年

	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
刊名	JOURNAL OF APPLIED POLYMER SCIENCE
	2008
卷号	109 期号:6 页码:3825
ISSN号	0021-8995
通讯作者	Zhu, ZY (reprint author), Chinese Acad Sci, Shanghai Inst Appl Phys, POB 800-204, Shanghai 201800, Peoples R China
英文摘要	Poly(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.
学科主题	Electrochemistry
收录类别	SCI
语种	英语
WOS记录号	WOS:000257724900050
公开日期	2012-04-18
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/7864]
专题	上海应用物理研究所_中科院上海应用物理研究所2004-2010年
推荐引用方式 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.(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.