丝光处理对 Grewia Optiva 天然纤维聚合物复合材料机械性能的影响

S. Chauhan, P. C. Gope
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摘要

对可持续发展的关注引发了在不同应用中采用可生物降解产品的需求。天然纤维正被广泛应用于各种复合材料领域。可持续建筑也在寻求新材料的研发,以尽量减少传统结构材料对环境的负面影响。从 Grewia Optiva(G.O.)树中提取的韧皮纤维在喜马拉雅山下的地形中大量存在,但在生物复合材料领域仍未得到充分利用。在生物复合材料制造中推广 G.O. 纤维可为农村丘陵地区的居民提供收入来源和就业机会。这项研究工作利用从北阿坎德邦奈尼塔尔县 Okhalkanda 区收集的 G.O. 纤维来开发生物复合材料。还研究了丝光处理对吸水性能和机械性能的影响。研究发现,用 NaOH 处理纤维后,G.O. 天然纤维增强生物复合材料(NFRB)的吸水率降低了 41.05%,机械性能也得到了明显改善。丝光纤维增强材料的拉伸强度和弯曲强度分别为 141.45 兆帕和 109.84 兆帕。冲击强度和 I 型断裂韧性分别为 11.97 KJ/m2 和 1.85 MPa√m。断裂表面的 SEM 图像显示,丝光纤维与环氧树脂基体的粘结性比未经处理的纤维要好。因此,Grewia Optiva 生物复合材料有望用于不同的建筑用途,如墙板、假天花板、门窗等。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Effect of Mercerization on Mechanical Properties of Grewia Optiva Natural Fiber Polymer Composites
The concerns towards sustainable development have triggered the need of adopting biodegradable products in different applications. The natural fibers are being widely explored in the field of composites for various applications. Sustainable architecture is also seeking the research and development of new materials to minimize the negative environmental effect of the traditional structural materials. A bast fiber obtained from Grewia Optiva (G.O.) tree is abundantly available in the sub-Himalayan terrains and is still underutilized in the field of biocomposites. The promotion of G.O. fiber in fabrication of biocomposites may give a source of income and employment to rural hilly populations. This research work utilizes the G.O. fiber collected from the Okhalkanda block of Nainital district of Uttarakhand to develop biocomposites. The effect of mercerization on the water absorption behavior and mechanical properties has been also studied. It is found that the treatment of fibers with NaOH reduces the water absorption tendency of G.O. Natural Fiber Reinforced Biocomposites (NFRB) upto 41.05% and the mechanical properties are also improved by appreciable amount. The tensile and flexural strength obtained are 141.45 MPa and 109.84 MPa respectively for mercerized fiber reinforcement. Impact strength and mode-I fracture toughness have been recorded as 11.97 KJ/m2 and 1.85 MPa√m respectively. SEM images of fractured surfaces indicate good bonding of mercerized fibers as compared to untreated fibers with epoxy matrix. Hence the Grewia Optiva biocomposites have potential to be used in different architectural applications like wall panels, false ceilings, doors, windows, etc.
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