| 天然高分子泡沫材料的复合结构与力学性能 |
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| 引用本文： | 尹作栋,潘则林,王才,董宇平,欧育湘.天然高分子泡沫材料的复合结构与力学性能[J].复合材料学报,2007,24(3):89-93. |
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| 作者姓名： | 尹作栋 潘则林 王才 董宇平 欧育湘 |
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| 作者单位： | 1.北京理工大学材料科学与工程学院, 北京 100081; |
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| 摘 要： | 通过扫描电子显微镜和光学显微镜研究了2 种天然高分子泡沫材料, 即玉米秆芯和高粱秆芯切面的泡孔形态结构及胞体堆砌模式。测试了材料在轴向和径向的压缩杨氏模量和压缩屈服强度等力学性能, 探讨了泡沫材料的压缩变形机制, 建立了天然泡沫材料的复合结构模型, 并分析了力学性能与复合结构的关系。研究结果表明, 这2 种天然泡沫均由一种近似六棱柱和少量圆形管状胞体构成, 它们在轴向的杨氏模量和屈服强度分别比径向的大4 倍以上。导管增强的复合结构是引起天然泡沫材料具有明显各向异性的重要原因, 其中厚壁导管的轴向杨氏模量约为不规则六棱柱胞体的105 倍。
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| 关 键 词： | 天然高分子 泡沫材料 复合结构 力学性能 |
| 文章编号： | 1000-3851（2007）03-0089-05 |
| 收稿时间： | 2006-07-11 |
| 修稿时间： | 2006-07-112006-10-11 |
Compound structure and mechanical properties ofthe natural polymeric cellular materials |
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| YIN Zuodong,PAN Zelin,WANG Cai,DONG Yuping,OU Yuxiang.Compound structure and mechanical properties ofthe natural polymeric cellular materials[J].Acta Materiae Compositae Sinica,2007,24(3):89-93. |
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| Authors: | YIN Zuodong PAN Zelin WANG Cai DONG Yuping OU Yuxiang |
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| Affiliation: | 1.School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China;2.Beijing National Laboratory for Molecular Sciences (BNLMS), New Materials Laboratory, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China |
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| Abstract: | The compressive yield stress and modulus of the two natural foam cores of kaoliang stem and corn stem were tested. Their structures and morphologies were determined by scanning electron microscope. The different compressive deformation mechanics of the foams were discussed. A compound structure model made up of hexangular prisms and tubular cells was established from the observation on scanning electron microscope photographs. The effects of the compound structure of the foams on their mechanical properties were studied on the basis of the model. The results show that the compressive yield stress and modulus of the two natural foam cores in the axial direction are more than 4 times of those in the radial direction. The compound structure of the foams reinforced by the tubular cells has more significant effects on the corresponding mechanical properties of the foams. The axial compressive modulus of a tubular cell is 105 times that of an abnormal hexangular prism cell. |
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| Keywords: | natural polymer foam materials compound structure mechanical properties |
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