| 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. |
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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;
2. 贵州民族大学 贵州省普通高等学校绿色节能材料特色重点实验室, 贵阳 550025 |
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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125~180μm、180~425μm、425~850μm和850~2 000μm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)、24h蠕变-24h回复测试和1 000h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425~850μm PWF/HDPE复合材料,其弯曲强度达到26.71MPa,弹性模量达到2.73GPa;PWF长度从180μm增加到2 000μm,PWF/HDPE复合材料的抗冲击性能变化不大;125~180μm 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 000μm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 000h形变仅为0.809mm,对比其他尺寸的PWF/HDPE复合材料1 000h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. |
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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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