Azim Abu Yousuf Mohammad Anwarul, Alimuzzaman Shah, Sarker Forkan
Department of Textile Engineering, Dhaka University of Engineering & Technology, DUET, Gazipur 1700, Bangladesh.
Department of Fabric Engineering, Bangladesh University of Textiles, Tejgaon, Dhaka 1208, Bangladesh.
ACS Omega. 2022 Mar 15;7(12):10127-10136. doi: 10.1021/acsomega.1c06241. eCollection 2022 Mar 29.
The fiber architecture can significantly influence the rate of impregnation of a resin in making composites and the load-bearing ability of individual fibers on testing of the loading directions. Moreover, achieving the maximum mechanical performance of a natural fiber composite selection of yarn liner density and optimization of fabric structure and further modification of the composites remains a great challenge for the composite research community. In this study, a number of jute-based woven derivatives (plain, 2/1 twill, 3/1 twill, zigzag based on a 2/2 twill, and diamond based on a 2/2 twill) have been constructed from similar linear densities of yarn. The effect of the fabric architecture and further modification of optimized composites by applying γ-radiation is also explained in this study. The experimental results show a 54% increase in tensile strength, a 75% increase in tensile modulus, a 69% increase in flexural strength, a 124% increase in flexural modulus, and 64% increase in impact strength of twill (3/1) structured jute fiber polyester composites in comparison to other plain and twill structured composites. A further mechanical improvement of around 20-30% is possible for the optimized twill structured composites by applying γ-radiation on the composites. An FTIR, TGA, and SEM study confirms the chemical, thermal, and fractographic changes after applying the modification of composites.
在制造复合材料时，纤维结构会显著影响树脂的浸渍速率以及在测试加载方向时单根纤维的承载能力。此外，对于天然纤维复合材料而言，要实现最大机械性能，选择纱线线密度、优化织物结构以及对复合材料进行进一步改性，仍然是复合材料研究领域面临的巨大挑战。在本研究中，基于相似线密度的纱线构建了多种黄麻基机织衍生物（平纹、2/1斜纹、3/1斜纹、基于2/2斜纹的之字形以及基于2/2斜纹的菱形）。本研究还解释了织物结构以及通过γ辐射对优化后的复合材料进行进一步改性的效果。实验结果表明，与其他平纹和斜纹结构的复合材料相比，斜纹（3/1）结构的黄麻纤维聚酯复合材料的拉伸强度提高了54%，拉伸模量提高了75%，弯曲强度提高了69%，弯曲模量提高了124%，冲击强度提高了64%。通过对复合材料施加γ辐射，优化后的斜纹结构复合材料的机械性能可能会进一步提高约20 - 30%。傅里叶变换红外光谱（FTIR）、热重分析（TGA）和扫描电子显微镜（SEM）研究证实了对复合材料进行改性后其化学、热学和断口形貌的变化。
