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| Composition, structure and mechanical properties of several natural cellular materials | |
| 引用本文： | YIN ZuoDong PAN ZeLin WANG Cai DONG YuPing OU YuXiang. Composition, structure and mechanical properties of several natural cellular materials[J]. 科学通报(英文版), 2007, 52(21): 2903-2908. DOI: 10.1007/s11434-007-0432-5 |
| 作者姓名： | YIN ZuoDong PAN ZeLin WANG Cai DONG YuPing OU YuXiang |
| 作者单位： | [1]Beijing National Laboratory for Molecular Sciences （BNLMS）, New Materials Laboratory, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China [2]Beijing Institute of Technology, Beijing 100081, China |
| 基金项目： | Supported by the National Natural Science Foundation of China （Grant No. 20474070）The authors wish to acknowledge the help of Researcher Wu M Y of the Institute of Chemistry, Chinese Academy of Sciences, to our work. We also thank Profs. Hong C M of Peking University and Gao X P of Nankai Uni- versity for their helpful guidance. |
| 摘 要： | The stem piths of sunflower, kaoliang and corn are natural cellular materials. In this paper, the contents of the compositions of these piths are determined and their cell shapes and structures are examined through scanning electron microscope (SEM) and optical microscope. Further research is conducted in the effects of the compositions and structures of the piths on the mechanical properties after testing the partial mechanical properties. The results show that the total cellulose, hemicelluloses and lignin content of each sample approaches 75% of the dry mass of its primary cell walls. With the fall of R value, a parameter relative to the contents of the main compositions, the flexibilities of the cellular piths de- scend while their stresses and rigidities increase. The basic cell shape making up the sunflower pith is approximately a tetrakaidehedron. The stem piths of kaoliang and corn are made up of cells close to hexangular prisms and a few tubular ones which can observably reinforce their mechanical properties in the axial directions. |
| 关 键 词： | 天然泡沫 合成物 机械特征 天然泡沫材料 |
| 收稿时间： | 2007-01-11 |
| 修稿时间： | 2007-01-11 |
Composition,structure and mechanical properties of several natural cellular materials |
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| Yin ZuoDong,Pan ZeLin,Wang Cai,Dong YuPing,Ou YuXiang. Composition,structure and mechanical properties of several natural cellular materials[J]. Chinese science bulletin, 2007, 52(21): 2903-2908. DOI: 10.1007/s11434-007-0432-5 | |
| Authors: | Yin ZuoDong Pan ZeLin Wang Cai Dong YuPing Ou YuXiang |
| Affiliation: | (1) Beijing National Laboratory for Molecular Sciences (BNLMS), New Materials Laboratory, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100080, China;(2) Beijing Institute of Technology, Beijing, 100081, China |
| Abstract: | The stem piths of sunflower, kaoliang and corn are natural cellular materials. In this paper, the contents of the compositions of these piths are determined and their cell shapes and structures are examined through scanning electron microscope (SEM) and optical microscope. Further research is conducted in the effects of the compositions and structures of the piths on the mechanical properties after testing the partial mechanical properties. The results show that the total cellulose, hemicelluloses and lignin content of each sample approaches 75% of the dry mass of its primary cell walls. With the fall of R value, a parameter relative to the contents of the main compositions, the flexibilities of the cellular piths de- scend while their stresses and rigidities increase. The basic cell shape making up the sunflower pith is approximately a tetrakaidehedron. The stem piths of kaoliang and corn are made up of cells close to hexangular prisms and a few tubular ones which can observably reinforce their mechanical properties in the axial directions. |
| Keywords: | natural foam composition structure mechanical property bionic model |
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