辊压法烟草薄片增强用醚化改性木质纤维的研究

作者：Wei Pei; Gao Song; Li Guanhui; Fang Zhiqiang; Liu Zhichang; Shu Hao; Tong Yuxing; Le Xi; Wang Ziwei; Chen Yizhen; Yan Qunshan^*; Peng Rui; Wan Chao

来源：China Pulp and Paper, 2021, 40(7): 78-86.

DOI：10.11980/j.issn.0254-508X.2021.07.012

• Carboxymethylated modified fiber
• Heat-not-burn tobacco
• Rolled reconstituted tobacco
• Tensile strength

The influence of etherification process parameters on fiber carboxyl content was studied by designing orthogonal experiments, and the effects of carboxyl group content on fiber morphology, crystalline structure, water retention capacity of wood fibers and its dispersibility in reconstituted tobacco were explored in this study. Finally, a comparison in reinforcement effect of original fibers and carboxymethylated fibers with different carboxyl group contents was carried out. The results showed that the order of these process factors affecting the fiber carboxyl group content was as follows: reagent dosage>fiber concentration>reaction time. The content of carboxyl group was proportional to reagent dosage and inversely proportional to fiber concentration with an optimum reaction time of 50 min. With the increase of carboxyl group content, the average width of carboxymethylated wood fibers increased, the length-weighted mean length increased first and then decreased, while the fine content decreased first and then increased. Besides, carboxymethylated wood fibers with higher carboxyl content groups showed a higher water retention value and could improve their dispersion uniformity in reconstituted tobacco sheet. Compared with sample of original wood fibers, rolled reconstituted tobacco sheet with carboxymethylated fibers (carboxyl group content≥0.65 mmol/g) indicated a 35.8%~106.6% increase in tensile strength. ? 2021, China National Pulp and Paper Research Institute(CNPPRI). All right reserved.

• 单位
  制浆造纸工程国家重点实验室; 华南理工大学