In-situ polymerization of lignocelluloses of autohydrolysis process with acrylamide  

作　　者：Haosong Zhao Weijue Gao Pedram Fatehi 

机构地区：[1]Biorefining Research Institute and Chemical Engineering Department,Lakehead University,Thunder Bay P7B 5E1,Canada

出　　处：《Journal of Bioresources and Bioproducts》2023年第3期235-245,共11页生物质资源与工程（英文）

摘　　要：In the present study,the hydrolysates generated via autohydrolysis of spruce wood chips were di-rectly used as feedstock for producing coagulants.The in-situ polymerization of acrylamide(AM)and lignocellulose(LC)of hydrolysates was successfully conducted.The reaction was optimized to generate lignocellulose-acrylamide(LC-AM)with the highest molecular weight(41,060 g/mol)and charge density(-0.25 meq/g)under the optimum conditions,which were 3 h,60◦C,4%(w)initiator based on the dried mass of hydrolysate,and an AM/LC molar ratio of 5.63.A nuclear magnetic resonance(NMR)spectroscopy confirmed the grafting of acrylamide on LC.Other prop-erties of LC-AM were characterized by the elemental analyzer,zeta potential analyzer,gel per-meation chromatography(GPC),and particle charge detector(PCD).The LC-AM was applied as a coagulant for removing ethyl violet dye from a simulated dye solution.The results indicated that 47.2%dye was removed from the solution at a low dosage of 0.2 g/g.The dual flocculation of LC-AM with other polymers for dye removal is suggested to further improve its effectiveness.

关 键 词：POLYMERIZATION HYDROLYSATE LIGNOCELLULOSE ACRYLAMIDE BIOREFINING 

分 类 号：O636.2[理学—高分子化学]