Scholarlink

<p>Due to the presence of lignin, lignin-rich nanocellulose (LNC) has great potential applications in many fields, and the conventional methods for nanocellulose production have the problems such as high energy and chemical consumption or environmental pollution. In the present work, poplar chemi-thermo-mechanical pulp (CTMP) was used as raw material, and deep eutectic solvents (DESs) composed of Choline chloride (ChCl)/Oxalic acid (OA) pretreatment with in situ lignin regeneration process followed by ultrasonic treatment were used to prepare lignin-rich nanocellulose. The effects of pretreatment conditions on the properties of the LNC were investigated, and a novel process for LNC preparation was explored. The results show that with the increases of the pretreatment temperature or time, the lignin content and the yield of the obtained LNC increases, and the color of the LNC becomes deeper. When the pulp was pretreated at 120&#xa0;°C for 2&#xa0;h, the LNC with a yield of 59.0% and lignin content of 27.7% was obtained, and its average diameter is 3.9&#xa0;nm. In addition, it has good thermal stability (T<sub>max</sub> = 351&#xa0;°C). The films prepared from the LNC exhibits excellent UV shielding properties.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Fabrication of lignin-rich nanocellulose from chemi-thermo-mechanical pulp by deep eutectic solvents pretreatment combined with a lignin regeneration process

  • 期刊论文

  • 发表日期：

    2025年5月5日

查看全文
  • Xiaoqin Wang,
  • Qinghua Li,
  • Zongquan Li,
  • Yingjuan Fu

摘要

Due to the presence of lignin, lignin-rich nanocellulose (LNC) has great potential applications in many fields, and the conventional methods for nanocellulose production have the problems such as high energy and chemical consumption or environmental pollution. In the present work, poplar chemi-thermo-mechanical pulp (CTMP) was used as raw material, and deep eutectic solvents (DESs) composed of Choline chloride (ChCl)/Oxalic acid (OA) pretreatment with in situ lignin regeneration process followed by ultrasonic treatment were used to prepare lignin-rich nanocellulose. The effects of pretreatment conditions on the properties of the LNC were investigated, and a novel process for LNC preparation was explored. The results show that with the increases of the pretreatment temperature or time, the lignin content and the yield of the obtained LNC increases, and the color of the LNC becomes deeper. When the pulp was pretreated at 120 °C for 2 h, the LNC with a yield of 59.0% and lignin content of 27.7% was obtained, and its average diameter is 3.9 nm. In addition, it has good thermal stability (Tmax = 351 °C). The films prepared from the LNC exhibits excellent UV shielding properties.