| 多孔PVA水凝胶的组成、形貌及泊松比等力学性能研究 |
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| 引用本文： | 吕鹤翔,郑裕东,孟昊业,徐曼琼,郭兴敏. 多孔PVA水凝胶的组成、形貌及泊松比等力学性能研究[J]. 高分子学报, 2009, 0(11): 1096-1100. DOI: 10.3724/SP.J.1105.2009.01096 |
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| 作者姓名： | 吕鹤翔 郑裕东 孟昊业 徐曼琼 郭兴敏 |
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| 作者单位： | 1. 北京科技大学材料科学与工程学院,北京,100083
2. 清华大学航空航天学院,北京,100084 |
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| 基金项目： | 国家自然科学基金，国家科技支撑项目，北京科技大学国家级材料实验教学示范中心资助项目 |
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| 摘 要： | 制备了不同含量的纯聚乙烯醇(PVA)水凝胶和不同表面活性剂含量的多孔PVA水凝胶,采用数字散斑测量其泊松比,并使用电镜和显微镜观察其微观结构,探讨了纯PVA水凝胶与多孔PVA水凝胶组成、微观结构、泊松比、压缩模量和体积模量的变化及相互关系.研究发现,采用表面活性剂成孔,反复冷冻成型制备的闭孔结构水凝胶,其泊松比随应力应变增加而减小;随PVA含量增加而泊松比值减小;随表面活性剂含量增加,孔径变大,泊松比值减小.PVA水凝胶泊松比值与压缩模量和体积模量的比值成正比.
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| 关 键 词： | 泊松比 多孔水凝胶 聚乙烯醇 表面活性剂 |
| 收稿时间： | 2008-10-22 |
COMPOSITION AND MICRO-MORPHOLOGY OF POROUS PVA HYDROGELS AND THEIR POISSON'S RATIO AND MECHANICAL PROPERTIES |
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| L Hexiang,ZHENG Yudong,MENG Haoye,XU Manqiong,GUO Xingmin. COMPOSITION AND MICRO-MORPHOLOGY OF POROUS PVA HYDROGELS AND THEIR POISSON'S RATIO AND MECHANICAL PROPERTIES[J]. Acta Polymerica Sinica, 2009, 0(11): 1096-1100. DOI: 10.3724/SP.J.1105.2009.01096 |
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| Authors: | L Hexiang ZHENG Yudong MENG Haoye XU Manqiong GUO Xingmin |
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| Affiliation: | College of Materials Science and Engineering, Beijing University of Science and Technology, Beijing 100083, College of Aeronautics and Astronautics, Tsinghua University, Beijing 100084 |
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| Abstract: | In order to obtain the auxetic hydrogels with negative Poisson's ratio,porous poly(vinyl alcohol)(PVA) hydrogels with different contents of PVA and surfactant(alkylphenol ethoxylates:OP) were prepared by methods of surfactants template and repeatedly freezing-thawing process,according to the microstructure and deformation mechanism of auxetic materials.The Poisson's ratio and mechanical properties of porous PVA hydrogels were measured and calculated by digital speckle technique.The microstructure and pore m... |
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| Keywords: | Poisson's ratio Porous hydrogels Poly(vinyl alcohol) Surfactants |
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