Enhancement of Hydrotropic Fractionation of Poplar Wood Using Autohydrolysis and Disk Refining Pretreatment: Morphology and Overall Chemical Characterization

被引:25
作者
Gu, Yanting [1 ,2 ]
Bian, Huiyang [1 ,3 ]
Wei, Liqing [4 ]
Wang, Ruibin [5 ]
机构
[1] Nanjing Forestry Univ, Jiangsu Coinnovat Ctr Efficient Proc & Utilizat F, Nanjing 210037, Jiangsu, Peoples R China
[2] Nanjing Forestry Univ, Coll Furnishings & Ind Design, Nanjing 210037, Jiangsu, Peoples R China
[3] Nanjing Forestry Univ, Jiang Prov Key Lab Pulp & Paper Sci & Technol, Nanjing 210037, Jiangsu, Peoples R China
[4] US Forest Serv, Forest Prod Lab, USDA, Madison, WI 53726 USA
[5] Guangdong Univ Technol, Ctr Emerging Mat & Technol, Sch Mat & Energy, Guangzhou 510006, Guangdong, Peoples R China
关键词
hydrotropic fractionation; autohydrolysis; disk refining; fiber morphology; chemical composition; WHEAT-STRAW; CELLULOSE NANOCRYSTALS; KRAFT PULP; LIGNIN; ACID; HYDROLYSIS; DELIGNIFICATION; NANOMATERIALS; KINETICS;
D O I
10.3390/polym11040685
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Solid acids have been proposed as a hydrolytic agent for wood biomass dissolution. In this work, we presented an environmentally friendly physicochemical treatment to leave behind cellulose, dissolve hemicellulose, and remove lignin from poplar wood. Several pretreatments, such as autohydrolysis and disk refining, were compared to optimize and modify the process. The p-toluenesulfonic acid could extract lignin from wood with a small amount of cellulose degradation. Disk refining with subsequent acid hydrolysis (so-called physicochemical treatment) doubled the delignification efficiency. A comprehensive morphology and overall chemical composition were provided. The crystallinity index (CrI) of treated poplar was increased and the chemical structure was changed after physicochemical treatment. Optical microscopy and scanning electron microscopy analysis demonstrated physicochemical treatment affected the morphology of poplar wood by removing lignin and generating fiberization. In general, this work demonstrated this physicochemical method could be a promising fractionation technology for lignocellulosic biomass due to its advantages, such as good selectivity, in removing lignin while preserving cellulose.
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页数:12
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