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ABSTRACT
This experimental study aims to explore natural lignocellulosic fibers from Jenfokie and Doby plants. The effect of the fiber (water-retted and non-retted) extraction methods on physical, mechanical, thermal, chemical, and crystallinity properties were experimentally investigated for fibers collected from the eastern highlands of Ethiopia. The chemical composition (cellulose, hemicellulose, lignin, extractives, etc.) was determined after different treatment processes. The tensile strength maximum of up to 72 cN/tex and 56 cN/tex, and cellulose content up to 85% and 81% were obtained for Jenfokie and Doby retted extracted fibers, respectively. There was small difference lignin extracted by Klason method and the alkaline hydrogen peroxide (APH) method. Each step-wise extracted fiber was characterized to cognize the intrinsic changes during the multi-step extraction process. The diameters were determined by Optical Microscope (OM), the removal of non-cellulosic materials by Fourier Transform Infrared (FT-IR) spectroscopy, the thermal stability (up to 375°C) by thermogravimetry (TGA), and the crystallinity index (up to 73%) by using X-ray Diffraction (XRD). An improvement in cellulose content, density, moisture absorption, tensile strength, thermal stability, and crystallinity of Jenfokie (unstudied or new) and Doby plant retted fibers would be promising for composite and textile materials.
摘要
本实验旨在探索Jenfokie和Doby植物的天然木质纤维素纤维. 实验研究了从埃塞俄比亚东部高地采集的纤维（水浸和非浸）提取方法对物理、机械、热、化学和结晶性能的影响. 在不同的处理工艺后，测定了化学成分（纤维素、半纤维素、木质素、提取物等）. Jenfokie和Doby retted提取纤维的最大拉伸强度分别高达72 cN/tex和56 cN/tex，纤维素含量分别高达85%和81%. Klason法和碱性过氧化氢法提取木质素差异较小. 对每一步提取的纤维进行表征，以识别多步提取过程中的内在变化. 通过光学显微镜（OM）测定直径，通过傅立叶变换红外（FT-IR）光谱测定非纤维素材料的去除，通过热重分析（TGA）测定热稳定性（高达375°C），通过X射线衍射（XRD）测定结晶度指数（高达73%）. Jenfokie（未研究的或新的）和Doby植物脱胶纤维在纤维素含量、密度、吸湿性、拉伸强度、热稳定性和结晶度方面的改善将有望用于复合材料和纺织材料.
Highlights
In this work, the fibers and cellulose were extracted from the natural lignocellulosic fibers of Jenfokie and Doby plants. The extraction of fibers and cellulose from Doby plants is compared with Jenfokie (relatively unstudied/new) plants. The key highlights of this work are mentioned below:
Water-retted extraction of both Jenfokie and Doby fibers improved the physicochemical, mechanical, and chemical properties compared to unretted/dry retted extraction process.
An increase in thermal stability and crystallinity index was observed for both retted-extracted Jenfokie and Doby fibers.
The high cellulose content of retted-extracted fibers ensures good physical, mechanical, and thermal properties.
Tensile strength maximum up to 72 cN/tex and 56 cN/tex and the cellulose content of up to 85% and 81% were obtained for Jenfokie and Doby retted extracted fibers, respectively.
An improvement in cellulose content, density, moisture absorption, tensile strength, thermal stability, and crystallinity of Jenfokie plant (unstudied or new) fiber would be a promising material for composite and textile applications.
We confirm that neither the manuscript nor any parts of its content are currently under consideration or published in another journal.
Acknowledgements
The first author’s PhD study was made possible and supported by Wachamo University and Adama Science and Technology University (ASTU), both in Ethiopia, the authors acknowledge.
Disclosure statement
No potential conflict of interest was reported by the authors.
Credit author statement
Solomon Estifo Wossine: Data collection, Testing, Investigation, Methodology, Result analysis, Writing-original draft. Thothadri Ganesh Conceptualization, Methodology, Supervision, Review & Editing and validation. Habtamu Beri Tufa Conceptualization, Methodology, Validation and Supervision.
Supplementary material
Supplemental data for this article can be accessed online at https://doi.org/10.1080/15440478.2023.2229518