Small angle X-ray scattering study of microstructure changes of organic hydrogels from supercritical carbon dioxide drying
文献类型：期刊论文
| 作者 | Zhang, R; Xu, Y; Meng, QH; Zhan, L; Li, KX; Wu, D; Ling, LC; Wang, J; Zhao, H; Dong, BZ |
| 刊名 | JOURNAL OF SUPERCRITICAL FLUIDS
 |
| 出版日期 | 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 |
| 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. |
| 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. |
| 学科主题 | Chemistry; Engineering |
| 类目[WOS] | Chemistry, Physical ; Engineering, Chemical |
| 收录类别 | SCI |
| WOS记录号 | WOS:000220079800010 |
| 公开日期 | 2016-05-03 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/227280]  |
| 专题 | 高能物理研究所_多学科研究中心 |
| 推荐引用方式 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!. |
入库方式： OAI收割
来源：高能物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。