Mohan Abisha, Priya Retnam Krishna, Arunachalam Krishna Prakash, Avudaiappan Siva, Maureira-Carsalade Nelson, Roco-Videla Angel
PG & Research Department of Physics, Holy Cross College, Nagercoil, Affiliated to Manonmaniam Sundaranar University, Tirunelveli 627012, India.
Department of Civil Engineering, University College of Engineering Nagercoil, Anna University, Nagercoil 629004, India.
Polymers (Basel). 2023 Aug 24;15(17):3522. doi: 10.3390/polym15173522.
The only biotic factor that can satisfy the needs of human species are plants. In order to minimize plastic usage and spread an immediate require of environmental awareness, the globe urges for the development of green composite materials. Natural fibers show good renewability and sustainability and are hence utilized as reinforcements in polymer matrix composites. The present work concerns on the usage of Butea parviflora fiber (BP), a green material, for high end applications. The study throws light upon the characterization of raw and potassium hydroxide (KOH)-treated Butea Parviflora plant, where its physical, structural, morphological, mechanical, and thermal properties are analyzed using the powder XRD, FTIR spectroscopy, FESEM micrographs, tensile testing, Tg-DTA, Thermal conductivity, Chemical composition, and CHNS analysis. The density values of untreated and KOH-treated fibers are 1.238 g/cc and 1.340 g/cc, respectively. The crystallinity index of the treated fiber has significantly increased from 83.63% to 86.03%. The cellulose content of the treated fiber also experienced a substantial increase from 58.50% to 60.72%. Treated fibers exhibited a reduction in both hemicelluloses and wax content. Spectroscopic studies registered varying vibrations of functional groups residing on the fibers. SEM images distinguished specific changes on the raw and treated fiber surfaces. The Availability of elements Carbon, Nitrogen, and Hydrogen were analyzed using the CHNS studies. The tensile strength and modulus of treated fibers has risen to 192.97 MPa and 3.46 Gpa, respectively. Thermal conductivity (K) using Lee's disc showed a decrement in the K values of alkalized BP. The activation energy E lies between 55.95 and 73.15 kJ/mol. The fibers can withstand a good temperature of up to 240 °C, presenting that it can be tuned in for making sustainable composites.
唯一能够满足人类需求的生物因素是植物。为了尽量减少塑料使用并迅速提高环境意识，全球迫切需要开发绿色复合材料。天然纤维具有良好的可再生性和可持续性，因此被用作聚合物基复合材料的增强材料。目前的工作关注的是一种绿色材料——小花紫铆纤维（BP）在高端应用中的使用。该研究揭示了未经处理和经氢氧化钾（KOH）处理的小花紫铆植物的特性，通过粉末X射线衍射（XRD）、傅里叶变换红外光谱（FTIR）、场发射扫描电子显微镜（FESEM）图像、拉伸试验、差示扫描量热-差热分析（Tg-DTA）、热导率、化学成分和元素分析（CHNS）对其物理、结构、形态、力学和热性能进行了分析。未经处理和经KOH处理的纤维密度值分别为1.238克/立方厘米和1.340克/立方厘米。处理后纤维的结晶度指数从83.63%显著提高到86.03%。处理后纤维的纤维素含量也大幅增加，从58.50%增至60.72%。处理后的纤维半纤维素和蜡含量均有所降低。光谱研究记录了纤维上官能团的不同振动。扫描电子显微镜图像区分了未经处理和处理后纤维表面的特定变化。通过CHNS研究分析了碳、氮和氢元素的含量。处理后纤维的拉伸强度和模量分别提高到192.97兆帕和3.46吉帕。使用李氏圆盘法测得的热导率（K）显示碱化小花紫铆纤维的K值有所降低。活化能E在55.95至73.15千焦/摩尔之间。这些纤维能够承受高达240℃的良好温度，表明它可用于制造可持续复合材料。
