Small angle X-ray scattering study of microstructure changes of organic hydrogels from supercritical carbon dioxide drying
Zhang, R; Xu, Y; Meng, QH; Zhan, L; Li, KX; Wu, D; Ling, LC; Wang, J; Zhao, H; Dong, BZ; Wang J(王俊); Zhao H(赵辉); Dong BZ(董宝中)
刊名JOURNAL OF SUPERCRITICAL FLUIDS
2004
卷号28期号:2-3页码:#REF!
关键词organic aerogels supercritical carbon dioxide drying small angle X-ray scattering positive deviation from Porod's law
学科分类Chemistry; Engineering
DOI10.1016/S0896-8446(03)00041-X
通讯作者Ling, LC (reprint author), Chinese Acad Sci, Key Lab Carbon Mat, Inst Coal Chem, POB 165, Taiyuan 030001, Peoples R China.
文章类型Article
英文摘要Hydrogels (HG) were prepared by the sol-gel polymerization of phenolic resole, m-cresol resole and methylolated melamine mixtures with different recipes in basic aqueous solution at 85 degreesC for 5 days. Water in the HG was displaced by acetone to obtain acetone gels (AG). Organic aerogels (OA) were obtained by drying of AG under supercritical carbon dioxide. Small angle X-ray scattering (SAXS) using synchrotron radiation as X-ray source was employed to investigate microstructure of HG, AG and OA. It is found that physical cross-linking is dominant in HG and supercritical drying of the physically dominant cross-linked gels cause the following microstructure changes: (1) random growth of large scatterers that "bury" the scattering peak; (2) shrinking of gels; (3) deswelling of gel network and (4) evolution of gel structure from tangled or rough interface to smooth or flat interface. (C) 2003 Elsevier B.V. All rights reserved.
类目[WOS]Chemistry, Physical ; Engineering, Chemical
收录类别SCI
WOS记录号WOS:000220079800010
引用统计
被引频次:7[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/227280
专题中国科学院高能物理研究所_多学科研究中心_期刊论文
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GB/T 7714
Zhang, R,Xu, Y,Meng, QH,et al. Small angle X-ray scattering study of microstructure changes of organic hydrogels from supercritical carbon dioxide drying[J]. JOURNAL OF SUPERCRITICAL FLUIDS,2004,28(2-3):#REF!.
APA Zhang, R.,Xu, Y.,Meng, QH.,Zhan, L.,Li, KX.,...&董宝中.(2004).Small angle X-ray scattering study of microstructure changes of organic hydrogels from supercritical carbon dioxide drying.JOURNAL OF SUPERCRITICAL FLUIDS,28(2-3),#REF!.
MLA Zhang, R,et al."Small angle X-ray scattering study of microstructure changes of organic hydrogels from supercritical carbon dioxide drying".JOURNAL OF SUPERCRITICAL FLUIDS 28.2-3(2004):#REF!.
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