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| Study on Bleaching Process of Pre-hydrolyzed Bamboo Sulfate Pulp |
| Received:June 12, 2024 |
| DOI：10.11980/j.issn.0254-508X.2024.07.004 |
| Key Words:bamboo pulp oxygen delignification ClO2 bleaching Eop bleaching |
| Fund Project:国家重点研发计划（2023YFD2201903）；福建省引导性项目（2023H0008）。 |
| Author Name | Affiliation | Postcode | | NIU Shengyue | 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 | | LUO Xiyao | 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 | | GAO Yafeng | 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 | | HU Huichao | 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:Using pre-hydrolyzed sulfate unbleached bamboo pulp as raw material， the dissolved bamboo pulp was prepared by the bleaching process of “oxygen delignification （O）-first stage chlorine bleaching （D0）-oxygen and hydrogen peroxide enhanced alkali extraction （Eop）-second stage chlorine bleaching （D1）”. The treatment conditions of each section were optimized （O bleaching stage： sodium hydroxide dosage of 2.0%， oxygen pressure of 0.5 MPa， reaction time of 60 min， reaction temperature of 95 ℃； D0 bleaching stage： chlorine dioxide dosage of 3.5%， reaction time of 80 min， reaction temperature of 70 ℃， the initial pH value of 4.0； Eop bleaching stage： hydrogen peroxide dosage of 1.4%， oxygen pressure of 0.2 MPa， reaction time of 90 min， reaction temperature of 90 ℃， initial pH value of 11.5； D1 bleaching stage： chlorine dioxide dosage of 1.5%， the reaction time of 150 min， the reaction temperature of 70 ℃， the initial pH value of 4.0）， and the final prepared bamboo pulp whiteness reached 82.7%， with viscosity of 440 mL/g， ash content of 0.24%， α-cellulose content of 90.92%. |
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