文献类型：期刊文献

英文题名：High-Quality Natural Fibers from Cotton Stalk Bark via Limited Alkali Penetration and Simultaneous Accelerated Temperature Rise

作者：Dong, Zhen[1];Li, Na[1];Chu, Teye[2];Ding, Jiangxin[1];Zhang, Junxiong[1];Dong, Aixue[3]

机构：[1]Nantong Univ, Coll Text & Apparel, Nantong 226019, Peoples R China;[2]Jiangxi Enda Technol Co Ltd, Xinyu 336600, Peoples R China;[3]Shaoxing Univ, Key Lab Cleaning Dyeing & Finishing Technol Zheji, Shaoxing 312000, Peoples R China

年份：2022

卷号：15

期号：2

外文期刊名：MATERIALS

收录：SCI-EXPANDED(收录号：WOS:000747557800001)、、EI(收录号：20220211444399)、Scopus(收录号：2-s2.0-85122387783)、WOS

基金：This work was funded by the Inner Mongolia Science and Technology Major Project (ZDZX2018060), the Postdoctoral Research Foundation of China (2019M652273), the Jiangxi Excellent Young Talents Program (20192BCB23030), the Jiangxi Provincial Postdoctoral Research Project Merit Funding (2019KY50) and the Jiangsu Provincial Key Research and Development Program (BE2018349).

语种：英文

外文关键词：lignocellulose; agricultural wastes; cotton stalks; natural fibers; lignin; cellulose

外文摘要：High-quality cotton stalk fibers that are both fine and have a high breakage strength are extracted via limited alkali penetration in the glycerol solvent and simultaneous accelerated temperature rise by means of microwave-assisted heating. Alkali is widely used in the extraction of cotton stalk fibers. However, alkali molecules in the aqueous phase penetrate easily into the fiber bundles, resulting in a simultaneous degumming between the inner and outer layers of the fiber bundles. In previous reports, the fibers treated in the aqueous phase present a coarse fineness (51.0 dtex) under mild conditions or have a poor breakage strength (2.0 cN/dtex) at elevated temperatures. In this study, glycerol is chosen as a solvent to reduce the penetration of alkali. Simultaneously, the microwave-assisted heating form is adopted to increase the temperature to 170 degrees C within 22 s. The inhibited alkali penetration and accelerated temperature rise limited the delignification to the outer layer, resulting in fibers with both appropriate fineness (23.8 dtex) and high breakage strength (4.4 cN/dtex). Moreover, the fibers also exhibit a clean surface and large contact angle. In this paper, we detail a new strategy to extract high-quality lignocellulosic fibers that will be suitable for potential reinforcing applications.