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首页> 外文期刊>Journal of Applied Polymer Science >Effect of fiber volume fraction on the thermal and mechanical behavior of polylactide-based composites incorporating bamboo fibers
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Effect of fiber volume fraction on the thermal and mechanical behavior of polylactide-based composites incorporating bamboo fibers

机译：纤维体积分数对竹纤维的聚酰胺基复合材料热和力学行为的影响

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摘要

Biodegradable composites reinforced with natural fibers are emerging as advanced materials in structural applications. In this work, green biocomposites are fabricated using hot pressing molding technique, polylactic acid selected as a matrix. The samples are prepared with different fiber volume fractions (30%, 40%, and 50%). Tensile tests are conducted on the specimens to investigate the composite mechanical behavior, and the influences of fiber content on the morphological and thermomechanical properties are evaluated using scanning electron microscopy, differential scanning calorimetry, and thermogravimetric analysis. There are higher tensile modulus and lower elongation at break for composites with increasing fiber content, respectively. Much variation in the tensile strength is observed when the fiber content is varied, which could be attributed to fiber agglomerations that affect the dispersion of fibers in the matrix, as evidenced by fracture surfaces. Thermal tests demonstrate that the increment of fiber content enhances the glass transition temperature and crystallization temperature of composites. Besides, a comparative analysis of the composites is performed, and the properties of the treated fiber composites are found to be improved compared to those from untreated fibers. Detailed analysis confirms the possibility of the addition of bamboo fibers to a biodegradable matrix for a specific application. (c) 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46148.
机译：用天然纤维增强的可生物降解的复合材料在结构应用中被涌现为先进材料。在这项工作中，使用热压模塑技术，选择作为基质的聚乳酸制造绿色生物复合材料。用不同的纤维体积分数（30％，40％和50％）制备样品。在试样上进行拉伸试验，以研究复合力学行为，使用扫描电子显微镜，差示扫描量热法和热重分析评估纤维含量对形态学和热机械性能的影响。具有较高的拉伸模量和较低的纤维含量的复合材料的伸长率和较低的伸长率。当变化纤维含量时，观察到拉伸强度的大量变化，这可能归因于影响纤维在基质中的分散的纤维聚集，如断裂表面所证明的。热试验表明纤维含量的增量增强了复合材料的玻璃化转变温度和结晶温度。此外，对复合材料的比较分析进行了比较分析，与来自未处理的纤维的那些相比，发现经处理的纤维复合材料的性质得到改善。详细分析证实，在可生物降解的基质中向可生物降解的基质进行添加的可能性。 （c）2017 Wiley期刊，Inc.J.Phill。聚合物。 SCI。 2018,135,46148。

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