https://orcid.org/0000-0001-5238-2520
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ABSTRACT
In recent years, natural fiber and its composites have attracted researchers due to environmental awareness. It is essential to identify new cellulose fibers for the potential polymer reinforcement. The current study deals with the investigation of natural cellulosic fibers extracted from the stem of Leucas aspera plants. The obtained fibers were treated with silane for effective use in composite applications. The physical, chemical, crystallinity, thermal stability, and morphological characteristics were analyzed for both untreated and silane-treated Leucas aspera fibers using chemical analysis, X-Ray diffraction test, fourier transform infrared spectroscopy, thermogravimetric analysis, and SEM images. The results showed that silane treatment removed excess lignin, wax and hemicellulose contents from Leucas aspera fibers and helped to increase its bonding characteristics with the matrix in composite applications leading to enhanced results compared to the untreated samples. There was a 2.1 times increase in crystalline index and better thermal stability with a char residue of 39%. To prove the applications' suitability, epoxy composites and friction composites in the form of brake pads were developed and analyzed for their mechanical performance as per ASTM and standard industrial practice. Increase in ultimate tensile strength was 56 MPa for silane-treated Leucas aspera fiber based epoxy composites while it was 43 MPa compared to its untreated samples. In brake pads, hardness was 93 for silane-treated LA fiber-based brake pads and 87 for the untreated.
抽象
近年来，由于环保意识，天然纤维及其复合材料吸引了研究人员. 识别潜在的聚合物增强物的新纤维素纤维至关重要. 目前的研究涉及从白鲸植物茎中提取的天然纤维素纤维的研究. 所得纤维采用硅烷处理，在复合材料应用中有效使用. 利用化学分析、X射线衍射试验、四联变换红外光谱法，对未处理和硅烷处理的柳叶原纤维的物理、化学、结晶、热稳定性和形态特性进行了分析. 热重力分析和 SEM 图像. 结果表明，硅烷处理从Leucas aspera纤维中去除过量的木质素、蜡和血脂含量，并有助于在复合应用中增加其与基质的粘合特性，从而比未经处理的样品. 晶体指数增加2.1倍，热稳定性较好，焦炭残留率为39%. 为了证明应用的适用性，根据ASTM和标准工业实践，开发和分析了制动片形式的环氧树脂复合材料和摩擦复合材料的机械性能. 最终抗拉强度增加为56 MPa的硅烷处理Leucas aspera纤维基环氧复合材料，而它是43MPa相比，其未经处理的样品。在制动片中，硅烷处理的洛杉矶纤维制动片的硬度为 93，未经处理的制动片的硬度为 87.