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| Study on Lignin Dissolution and Fiber Morphology Changes During Steaming of Neosinocalamus affinis |
| Received:May 26, 2025 Revised:July 18, 2025 |
| DOI：10.11980/j.issn.0254-508X.2026.02.003 |
| Key Words:Neosinocalamus affinis chemical composition sulfate pulping fiber morphology Kappa value |
| Fund Project:国家重点研发计划 （2023YFD2201903）；宜宾市竹产业重大攻关项目（YBZD202401）。 |
| Author Name | Affiliation | Postcode | | ZHENG Xiaobin* | College of Materials Engineering, National Forestry & Grassland Administration Key Lab for Plant Fiber Functional Materials, Fujian Agriculture and Forestry University, Fuzhou, Fujian Province, 350108 | 350108 | | ZHANG Haoyun | College of Materials Engineering, National Forestry & Grassland Administration Key Lab for Plant Fiber Functional Materials, Fujian Agriculture and Forestry University, Fuzhou, Fujian Province, 350108 | 350108 | | JI Chaoqun | College of Materials Engineering, National Forestry & Grassland Administration Key Lab for Plant Fiber Functional Materials, Fujian Agriculture and Forestry University, Fuzhou, Fujian Province, 350108 | 350108 | | LIN Kairui | College of Materials Engineering, National Forestry & Grassland Administration Key Lab for Plant Fiber Functional Materials, Fujian Agriculture and Forestry University, Fuzhou, Fujian Province, 350108 | 350108 | | YANG Jiawei | College of Materials Engineering, National Forestry & Grassland Administration Key Lab for Plant Fiber Functional Materials, Fujian Agriculture and Forestry University, Fuzhou, Fujian Province, 350108 | 350108 | | HUANG Liulian | College of Materials Engineering, National Forestry & Grassland Administration Key Lab for Plant Fiber Functional Materials, Fujian Agriculture and Forestry University, Fuzhou, Fujian Province, 350108 | 350108 | | LI Jianguo* | College of Materials Engineering, National Forestry & Grassland Administration Key Lab for Plant Fiber Functional Materials, Fujian Agriculture and Forestry University, Fuzhou, Fujian Province, 350108 | 350108 | | CHEN Lihui* | College of Materials Engineering, National Forestry & Grassland Administration Key Lab for Plant Fiber Functional Materials, Fujian Agriculture and Forestry University, Fuzhou, Fujian Province, 350108 | 350108 |
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| Abstract:This study used Neosinocalamus affinis as the raw material to investigate the effect of pulping conditions on lignin dissolution and fiber morphological evolution. During the process of sulfate pulping， with the increase of alkali dosage， maximum cooking temperature， and time at the maximum temperature as well as sulfidity effect of Neosinocalamus affinis was improved， the remove effect of lignin was enhanced， and the fiber morphology was optimized. Under the condition of alkali dosage of 18% (based on NaOH measurement)， maximum cooking temperature of 160 ℃， time at the maximum temperature of 120 min， and sulfidity of 25%， with the resulting bamboo pulp exhibited a yield of 49.2%，Kappa value of 17.7， fiber length and width of 1.620 mm and 20.60 μm， respectively， with a content of fine fibers of 2.6%， curling index of 5.7%， and the crystallinity index of 66.4%. In addition， the increase in alkali dosage decreased the Kappa value by 1.10/%， the increase in the maximum cooking temperature decreased the Kappa value by 0.35/℃， the increase in the time at the maximum temperature decreased the Kappa value by 0.11/min， and the increase in sulfidity decreased the Kappa value by 0.41/%， the Kappa value was relatively sensitive to the alkali dosage， but relatively insensitive to the time at the maximum temperature. The removal effect of lignin could be enhanced by increasing the alkli dosase and reducing the time at the maximum temperature. Under strengthened cooking condition， the fiber length and width decreased slightly， whereas the fiber curl index increased. |
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