Scholarlink

<p>Chlorine dioxide (ClO<sub>2</sub>) is a strong oxidative free radical. Under its oxidative action, lignin was effectively degraded at temperatures between 50 and 80&#xa0;°C. However, excessively high temperatures can lead to energy waste and enhance chlorination by-reactions, resulting in the formation of harmful substances. Therefore, this study constructed a high-concentration chlorine dioxide oxidation method, whereby lignin in pulp was effectively removed at room temperature (25&#xa0;°C). Through efficient recycling of chlorine dioxide, the remaining ClO<sub>2</sub> does not increase costs, and the physicochemical properties of the pulp before and after treatment indicate that high concentrations of ClO<sub>2</sub> at room temperature do not damage the fibers. Using a ball-milling device, a nanocellulose membrane with good air permeability was prepared. Molecular dynamics simulations demonstrate that the reaction between lignin molecules and ClO<sub>2</sub> molecules is primarily guided by van der Waals interactions, with a lesser contribution from electrostatic forces. This finding provides a novel method for fiber purification at room temperature and proposes a feasible approach for the valorization of cellulose.</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

Chlorine dioxide removes lignin for high-purity cellulose

  • 期刊论文

  • 发表日期：

    2026年8月1日

查看全文
  • Hao Xu,
  • Xianting Zeng,
  • Yanling Bin,
  • Renman Wu,
  • Liting Liu,
  • Chengrong Qin,
  • Chen Liang,
  • Shuangquan Yao,
  • Wenxuan Mo,
  • Baojie Liu

摘要

Chlorine dioxide (ClO2) is a strong oxidative free radical. Under its oxidative action, lignin was effectively degraded at temperatures between 50 and 80 °C. However, excessively high temperatures can lead to energy waste and enhance chlorination by-reactions, resulting in the formation of harmful substances. Therefore, this study constructed a high-concentration chlorine dioxide oxidation method, whereby lignin in pulp was effectively removed at room temperature (25 °C). Through efficient recycling of chlorine dioxide, the remaining ClO2 does not increase costs, and the physicochemical properties of the pulp before and after treatment indicate that high concentrations of ClO2 at room temperature do not damage the fibers. Using a ball-milling device, a nanocellulose membrane with good air permeability was prepared. Molecular dynamics simulations demonstrate that the reaction between lignin molecules and ClO2 molecules is primarily guided by van der Waals interactions, with a lesser contribution from electrostatic forces. This finding provides a novel method for fiber purification at room temperature and proposes a feasible approach for the valorization of cellulose.