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| Study on the Change Law of Pinle Single Bamboo Lignin-Carbohydrate Complex During APMP Pulping |
| Received:June 21, 2022 |
| DOI：10.11980/j.issn.0254-508X.2022.08.006 |
| Key Words:pink single bamboo LCC high yield pulp APMP lignin |
| Fund Project:广西自然科学基金项目“高得率竹浆中木质素-碳水化合物复合体（LCC）的结构变化及对返黄的影响”（项目编号：2018GXNSFAA281336）。 |
| Author Name | Affiliation | Postcode | | YUAN Xiaojun* | College of Light Industry and Food Engineering,Guangxi University,Nanning,Guangxi Zhuang Autonomous Region,530004
Guangxi Key Lab of Clean Pulping and Papermaking and Pollution Control,Nanning,Guangxi Zhuang Autonomous Region,530004 | 530004 | | SUN Xiaoping | College of Light Industry and Food Engineering,Guangxi University,Nanning,Guangxi Zhuang Autonomous Region,530004
Guangxi Key Lab of Clean Pulping and Papermaking and Pollution Control,Nanning,Guangxi Zhuang Autonomous Region,530004 | 530004 | | WEI Yuhe | College of Light Industry and Food Engineering,Guangxi University,Nanning,Guangxi Zhuang Autonomous Region,530004
Guangxi Key Lab of Clean Pulping and Papermaking and Pollution Control,Nanning,Guangxi Zhuang Autonomous Region,530004 | 530004 | | ZHU Qiuxiao | College of Light Industry and Food Engineering,Guangxi University,Nanning,Guangxi Zhuang Autonomous Region,530004
Guangxi Key Lab of Clean Pulping and Papermaking and Pollution Control,Nanning,Guangxi Zhuang Autonomous Region,530004 | 530004 | | WANG Tingting | College of Light Industry and Food Engineering,Guangxi University,Nanning,Guangxi Zhuang Autonomous Region,530004
Guangxi Key Lab of Clean Pulping and Papermaking and Pollution Control,Nanning,Guangxi Zhuang Autonomous Region,530004 | 530004 | | LUO Lianxin | College of Light Industry and Food Engineering,Guangxi University,Nanning,Guangxi Zhuang Autonomous Region,530004
Guangxi Key Lab of Clean Pulping and Papermaking and Pollution Control,Nanning,Guangxi Zhuang Autonomous Region,530004 | 530004 |
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| Abstract:In this paper， the structural changes of lignin-carbohydrate complex （LCC） in alkaline hydrogen peroxide mechanical pulping （APMP） （including pulping and bleaching） were studied. The results showed that the extraction rate of LCC increased after refining， the absolute mass increased by about 2.6 times， the connection between lignin and hemicellulose in LCC increased， the mass ratio of lignin increased from 7.29% to 9.04%， and the mass ratio of glucose decreased significantly. After bleaching， LCC was affected by the dissolution of lignin and hemicellulose， the extraction rate and absolute quality decreased， and the mass ratio of lignin in LCC increased to 25.07%. The bleached LCC molecules would partially disintegrate and recombine， and the molecular weight distribution would appear obvious “peak separation”， the polydispersity would be doubled， and the molecular weight would decrease. During APMP pulping process， the retention of lignin by LCC would hinder the improvement of pulp brightness and accelerate the yellowing. |
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