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2222材料工程  2015, Vol. 43 Issue (10): 14-19    DOI: 10.11868/j.issn.1001-4381.2015.10.003
  材料与工艺 本期目录 | 过刊浏览 | 高级检索 |
固化温度对亚麻纤维及其增强复合材料力学性能的影响
马豪, 李岩(), 王迪, 陆超
同济大学 航空航天与力学学院, 上海 200092
Effect of Curing Temperature on Mechanical Properties of Flax Fiber and Their Reinforced Composites
Hao MA, Yan LI(), Di WANG, Chao LU
School of Aerospace Engineering and Applied Mechanics, Tongji University, Shanghai 200092, China
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摘要 

研究热压成型过程中,不同固化温度对亚麻纤维及其增强复合材料力学性能的影响。结果表明:亚麻纤维在120,140℃和180℃分别处理2h后单纤维拉伸性能发生不同程度的下降。环氧树脂E-51在120,140℃和180℃下固化2h后拉伸性能未发生明显变化。基于环氧树脂的单向亚麻纱线增强复合材料分别在120℃和140℃固化成型时,拉伸强度和冲击强度变化不大。但当固化温度达到180℃时,由于亚麻纤维在高温环境下损伤较为严重,其增强复合材料的拉伸强度和冲击强度均发生明显的下降。然而复合材料的拉伸模量随着成型温度的升高有一定幅度的提升。

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马豪
李岩
王迪
陆超
关键词 亚麻纤维复合材料固化温度力学性能    
Abstract

The effect of different curing temperatures on the mechanical properties of flax fiber and their reinforced composites was studied during hot pressing forming process. The results show that the tensile strength of single flax fiber declines in varying degrees when flax fibers are treated for 2h at 120, 140℃ and 180℃, respectively, the tensile strength of epoxy resin E-51 has a little change after treated at the same conditions. Tensile and impact strength change slightly, when unidirectional flax yarn reinforced epoxy resin composites is cured under 120℃ and 140℃. However, when the curing temperature increases to 180℃, owing to the serious damage of flax fiber at high temperature, the tensile and impact strength of the flax fiber reinforced composites then decrease obviously. Meanwhile, as the curing temperature increases, the tensile modulus of composites improves in some degree.

Key wordsflax fiber    composite    curing temperature    mechanical property
收稿日期: 2014-04-21      出版日期: 2015-10-17
基金资助:国家重点基础研究发展计划(2010CB631105)
通讯作者: 李岩     E-mail: liyan@tongji.edu.cn
作者简介: 李岩(1972-),女,教授,主要从事天然纤维增强复合材料方面的研究,联系地址:上海市彰武路100号 (200092),E-mail: liyan@tongji.edu.cn
引用本文:   
马豪, 李岩, 王迪, 陆超. 固化温度对亚麻纤维及其增强复合材料力学性能的影响[J]. 材料工程, 2015, 43(10): 14-19.
Hao MA, Yan LI, Di WANG, Chao LU. Effect of Curing Temperature on Mechanical Properties of Flax Fiber and Their Reinforced Composites. Journal of Materials Engineering, 2015, 43(10): 14-19.
链接本文:  
http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2015.10.003      或      http://jme.biam.ac.cn/CN/Y2015/V43/I10/14
Fig.1  亚麻纤维TG
(a)和DTG (b)曲线
Fig.2  未处理亚麻单纤维强度分布图
Treatment temperature/℃ Single fiber strength/MPa Decline percent/%
Untreated 871.08
120 883.50 -1.4
140 857.68 1.5
180 615.65 29.8
Table 1  不同温度处理后的亚麻单纤维韦伯强度
Fig.3  未处理
(a)和180℃处理(b)亚麻纤维XRD曲线
Treatment temperature/℃ Degree of crystallinity/%
Untreated 73.95
180 75.46
Table 2  未处理和180℃处理亚麻纤维结晶度
Curing temperature /℃ Tensile strength/MPa Tensile modulus/GPa Elongation/%
120 36.62 3.08 1.06
140 34.24 2.91 1.21
180 34.71 2.96 1.12
Table 3  不同温度固化的环氧树脂拉伸性能
Fig.4  不同温度成型单向亚麻纱线增强复合材料的拉伸强度
(a)和拉伸模量(b)
Fig.5  不同温度成型单向亚麻纱线增强 复合材料的拉伸应力-应变曲线
Fig.6   (a),(b)和180℃(c),(d)固化成型复合材料不同尺度下拉伸断面的微观照片<br/> </td> </tr> <tr> <td height="25" class="J_zhaiyao"> <a class="figureClass" href="http://jme.biam.ac.cn/fileup/1001-4381/FIGURE/2015-43-10/Images/20151003/clgc-2015-10-14-7.jpg" > <img src="http://jme.biam.ac.cn/fileup/1001-4381/FIGURE/2015-43-10/Images/20151003/thumbnail/clgc-2015-10-14-7.jpg" align="middle" border=0> </a> </td> </tr> <tr> <td valign="top" align="left"> Fig.7  <b>不同温度成型单向亚麻纱线增强 复合材料的冲击性能</b><br/> </td> </tr> <tr> <td height="25" class="J_zhaiyao"> <a class="figureClass" href="http://jme.biam.ac.cn/fileup/1001-4381/FIGURE/2015-43-10/Images/20151003/clgc-2015-10-14-8.jpg" > <img src="http://jme.biam.ac.cn/fileup/1001-4381/FIGURE/2015-43-10/Images/20151003/thumbnail/clgc-2015-10-14-8.jpg" align="middle" border=0> </a> </td> </tr> <tr> <td valign="top" align="left"> Fig.8  <b>不同温度成型单向亚麻纱线增强 复合材料的冲击力位移曲线</b><br/> </td> </tr> </table> </div> <div id="ReferenceTab"> <table width="98%" border="0" align="center" cellpadding="0" cellspacing="8"> <tr> <td valign='top' align='right'>1</td> <td> <span class='magtech_ref_source'>LI Y, MAI Y W, YE L Sisal fibre and its composites: a review of recent developments[J]. 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