| 杨木纤维尺寸对热压成型杨木纤维/高密度聚乙烯复合材料力学和蠕变性能的影响 |
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| 引用本文： | 徐海龙,曹岩,王伟宏,王清文,王海刚. 杨木纤维尺寸对热压成型杨木纤维/高密度聚乙烯复合材料力学和蠕变性能的影响[J]. 复合材料学报, 2016, 33(6): 1168-1173. DOI: 10.13801/j.cnki.fhclxb.20160107.003 |
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| 作者姓名： | 徐海龙 曹岩 王伟宏 王清文 王海刚 |
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| 作者单位： | 1.东北林业大学 生物质材料科学与技术教育部重点实验室, 哈尔滨 150040; |
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| 基金项目： | 国家自然科学基金(31460171)，贵州省科学技术基金(黔科合J 字[2015]2075号) |
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| 摘 要： | 采用热压成型法制备了4种不同尺寸, 即125~180 μm、180~425 μm、425~850 μm和850~2 000 μm的杨木纤维(PWF)/高密度聚乙烯(HDPE)复合材料, 并对PWF/HDPE复合材料进行了弯曲性能测试、冲击性能测试、动态热力学分析(DMA)、24 h蠕变-24 h回复测试和1 000 h长期蠕变测试。结果表明:PWF的尺寸过大或者过小均不利于提高PWF/HDPE复合材料的弯曲性能, 增强效果最好的是425~850 μm PWF/HDPE复合材料, 其弯曲强度达到26.71 MPa, 弹性模量达到2.73 GPa;PWF长度从180 μm增加到2 000 μm, PWF/HDPE复合材料的抗冲击性能变化不大;125~180 μm PWF/HDPE复合材料的抗冲击性能较差;短PWF/HDPE复合材料的抗蠕变性能较差, 不适合在长期负载的条件下工作, 而850~2 000 μm的长PWF/HDPE复合材料的抗长期蠕变性能最好, 且回复率最高, 为78.46%;1 000 h形变仅为0.809 mm, 对比其他尺寸的PWF/HDPE复合材料1 000 h 形变的平均值降低了48.00%。
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| 关 键 词： | 复合材料 热压 纤维尺寸 力学性能 蠕变 |
| 收稿时间： | 2015-11-04 |
Effects of poplar wood fiber size on mechanical and creep properties of poplar wood fiber/high-density polyethylene composites prepared by hot-compression molding |
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| XU Hailong,CAO Yan,WANG Weihong,WANG Qingwen,WANG Haigang. Effects of poplar wood fiber size on mechanical and creep properties of poplar wood fiber/high-density polyethylene composites prepared by hot-compression molding[J]. Acta Materiae Compositae Sinica, 2016, 33(6): 1168-1173. DOI: 10.13801/j.cnki.fhclxb.20160107.003 |
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| Authors: | XU Hailong CAO Yan WANG Weihong WANG Qingwen WANG Haigang |
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| Affiliation: | 1.Key Laboratory of Bio-based Material Science & Technology, Ministry of Education, Northeast Forestry University, Harbin 150040, China;2.Special and Key Laboratory of Guizhou Provincial Higher Education for Green Energy-Saving Materials, Guizhou Minzu University, Guiyang 550025, China |
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| Abstract: | Four kinds of poplar wood fibers (PWF,125-180μm,180-425 μm,425-850μm and 850-2 000μm)/high-density polyethylene (HDPE)composites were prepared by means of hot-compression molding.The flexural property test,impact property test,dynamic thermo-mechanical analysis(DMA),24 h creep-24 h recovery test and 1 000 h long-term creep tests were performed for PWF/HDPE composites.The results show that the excessively large or small PWF size is not positively for improving the flexural property of PWF/HDPE composites.PWF/HDPE composites with fibers of 425-850 μm present the best enhancement effect.The flexural strength and the elastic modulus of 425-850μm PWF/HDPE composites are 26.71 MPa and 2.73 GPa,respectively.Impact resist-ance property of PWF/HDPE composites keeps constant,while the PWF size increases from 180μm to 2 000μm. Whereas,125-180μm PWF/HDPE composites have the lowest impact resistance property.The PWF/HDPE com-posites with small fibers have the worst anti-creep performance,indicating that it is not suitable for long-term load-ing.850-2 000μm PWF/HDPE composites with long fibers have outstanding long-term anti-creep performance and recovery (78.46%),and its 1 000 h deformation is just 0.809 mm,which compares with the average values of 1 000 h deformation for other PWF/HDPE composites and decreases by 48.00%. |
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| Keywords: | composites hot-compression fiber size mechanical properties creep |
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