Invasive plants can grow rampantly and spread fast in large amount, which can be economically invoked for generating value-added products. In this study, lignocellulosic fiber was extracted from the leaf waste of a luxuriant invasive plant, Mikania micrantha Kunth-ex H.B.K. by mercerization process. After the alkaline treatment, the lignocellulosic biomass remained at 38.54% resulting from the large removal of extractive impurities. The lignocellulosic fraction in the mercerized leaf fiber was improved from 56.59% to 83.96%. The chemical composition analysis showed the cellulose fraction was increased by 11.17% while the hemicellulose and lignin fractions were found to be decreased by 4.89% and 6.28%, respectively. The FT-IR and TGA results further affirmed the change in chemical composition of the lignocellulosic fiber. Furthermore, an increase in cellulose fraction raised the fiber crystallinity index from 11.0% to 36.7%. The SEM study revealed that the surface morphology of lignocellulosic fiber changed from smooth surface into rough corrugated ridges, which affirmed the increase in crystallinity, resulting from the removal of wrapped cementing materials. In subsequent, the lignocellulosic fiber exhibited more pervious to water attack with an increase in moisture absorption from 119.22% to 410.19%.

外来入侵植物可以迅速生长并大量快速传播，可以经济地用于生产增值产品。在这项研究中，木质纤维素纤维是从茂盛的入侵植物Mikania micrantha的叶子废料中提取的。Kunth-ex HBK采用丝光处理工艺。碱处理后，由于大量去除了萃取杂质，木质纤维素生物质保持在38.54％。丝光处理的叶纤维中的木质纤维素比例从56.59％提高到83.96％。化学成分分析表明，纤维素部分增加了11.17％，而半纤维素和木质素部分分别减少了4.89％和6.28％。FT-IR和TGA结果进一步证实了木质纤维素纤维化学成分的变化。此外，纤维素分数的增加将纤维结晶度指数从11.0％提高到36.7％。SEM研究表明，木质纤维素纤维的表面形态从光滑的表面变为粗糙的波纹状隆起，这证明了结晶度的提高，是因为去除了包裹的胶结材料。随后，木质纤维素纤维表现出更强的耐水侵蚀性，吸湿率从119.22％增加到410.19％。