旧报纸基含木质素CNC和CNF的综合制备与表征  

Integrated Preparation and Characterization of Lignin Containing Cellulose Nanocrystal and Nanofibril from Old Newspaper

作　　者：王营超 杨一帆 王瑾 王一霖 魏克凡 刘姗姗[1] 吉兴香[1] 韩陈晓 王强[1] WANG Yingchao;YANG Yifan;WANG Jin;WANG Yilin;WEI Kefan;LIU Shanshan;JI Xingxiang;HAN Chenxiao;WANG Qiang(State Key Lab of Bio-based Materials and Green Papermaking/Key Lab of Pulp&Paper of Science and Technology of Education Ministry,Qilu University of Technology(Shandong Academy of Sciences),Ji’nan,Shandong Province,250353;Shandong Century Sunshine Paper Group Co.,Ltd.,Weifang,Shandong Province,262499)

机构地区：[1]齐鲁工业大学(山东省科学院)生物基材料与绿色造纸国家重点实验室/制浆造纸科学与技术教育部重点实验室,山东济南250353 [2]山东世纪阳光纸业集团有限公司,山东潍坊262499

出　　处：《中国造纸》2021年第11期9-18,共10页China Pulp & Paper

基　　金：国家自然科学基金(31971602);山东省高等学校科技计划(2019KJC014);科教产融合科技创新工程项目(2020KJC-ZD14)。

摘　　要：本研究以旧报纸为原料,采用硫酸水解法制备了含木质素纤维素纳米晶体(LCNC),随后利用超声辅助球磨法将酸解沉淀的木质纤维素固体残渣(LCSR)解纤成含木质素纤维素纳米纤丝(LCNF),实现了LCNC和LCNF的综合制备,综合产率高达85%以上。采用多种手段对LCNC和LCNF样品的结构特性进行分析表征。结果表明,LCNC呈棒状晶体结构,LCNF呈长丝状结构,木质素以球状颗粒存在于LCNC和LCNF中。LCNC平均长度和宽度分别为143.6和24.8 nm,LCNF的平均直径为16.2 nm。X射线衍射仪(XRD)结果显示LCNC和LCNF均保留纤维素Ⅰ型结构,且木质素含量越高,其结晶度越低。同时,木质素本身的高疏水性和热稳定性使得木质素含量大的LCNC和LCNF具有更好的疏水性和热稳定性。In this study,lignin containing cellulose nanocrystal(LCNC)was produced from old newspaper using sulfuric acid hydrolysis process,and then acidolysis precipitated lignocellulosic solid residues(LCSR)were mechanically defibrillated into lignin containing cellulose nanofibril(LCNF)by ultrasonic assisted grinding method,which realized the integrated preparation of LCNC and LCNF with overall yield more than 85%.The structural characteristics of LCNC and LCNF samples were characterized and the results showed that LCNC displayed rod-like crystal structure,while LCNF presented long filament structure.Lignin existed in LCNC and LCNF as globularlike particles.The average length and width of LCNC were 143.6 and 24.8 nm,respectively,and the average diameter of LCNF was 16.2 nm.XRD results demonstrated that the cellulose typeⅠstructure was still retained in all LCNC and LCNF,and the higher the content of lignin in the sample,the lower the crystallinity.Meanwhile,the high hydrophobicity and thermal stability of lignin made LCNC and LCNF with large lignin content had better hydrophobicity and thermal stability.

关 键 词：旧报纸 含木质素纤维素纳米晶体 含木质素纤维素纳米纤丝 综合制备 

分 类 号：TS724[轻工技术与工程—制浆造纸工程] O636.11[理学—高分子化学]