文献类型：期刊文献

英文题名：Alkali synergetic two-step mechanical refining pretreatment of pondcypress for the fiber with intact 3D structure and ultrahigh cellulose accessibility fabrication

作者：Zou, Xiuxiu[1] Liang, Long[1] Shen, Kuizhong[1] Huang, Chen[1] Wu, Ting[1] Wu, Yiqiang[2] Fang, Guigan[1]

第一作者：Zou, Xiuxiu

通信作者：Shen, KZ[1];Fang, GG[1]

机构：[1]Chinese Acad Forestry, Inst Chem Ind Forest Prod, Jiangsu Prov Key Lab Biomass Energy & Mat, Nanjing 210042, Jiangsu, Peoples R China;[2]Cent South Univ Forestry & Technol, Sch Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China

年份：2021

卷号：170

外文期刊名：INDUSTRIAL CROPS AND PRODUCTS

收录：;EI(收录号：20212810622472);Scopus(收录号：2-s2.0-85109362874);WOS:【SCI-EXPANDED(收录号:WOS:000690448000010)】；

基金：This work was supported by the National Natural Science Foundation of China (31890771).

语种：英文

外文关键词：Alkaline hydrogen peroxide impregnation; Two-step mechanical refining; Intact spatial structure; Cellulose accessibility; Specific surface area

摘要：Although lignocellulosic biomass has promising applications in biodegradable cellulose-based composite materials due to its high specific surface area and high rigid intensity, lignocellulosic fiber with multiple surface reactive sites and intact spatial structure is still a great challenge as a versatile carrier for composite materials. Herein, a feasible strategy that combined alkaline hydrogen peroxide (AHP) impregnation and two-step mechanical refining was presented to treat the pondcypress (taxodium ascendens) for enhancing cellulose accessibility and specific surface area. Additionally, the prepared pondcypress fiber kept the intact spatial structure. First, the destruction of molecular structure barrier was synergistically realized by the NaOH and H2O2, that improved the efficiency of 2nd mechanical refining. Subsequently, the fibers exhibited an excellent dissociated result under the effect of shear stress and friction at low energy consumption (1637 kW h/t). As a result, the fibers achieved ultrahigh cellulose accessibility of 77.07 % and high surface active hydroxyl content of 2.164 x 10(-3) mol/g due to the exposure of 52 cell wall at the 16 % H2O2 and 17.5 % NaOH. Moreover, despite the fibers were fibrillated after treatments, the intact spatial structure of fiber was observed by SEM. These results confirm that AHP impregnation and two-step mechanical refining are an effective method to dissociate the fiber, and this work opens up more avenues to use the lignocellulosic fiber in cellulose-based composite materials.