聚离子液体改性废报纸基纤维素气凝胶及其染料吸附性能研究  

Study on Polymeric Ionic Liquid Modified Waste Newspaper-based Cellulosic Aerogel and Its Dye Adsorption Performance

作　　者：宋文琦 杨苗秀[2] 郑乐 杨金腾 历亚星 訾帅 罗晨 刘玉坤 钱立伟 SONG Wenqi;YANG Miaoxiu;ZHENG Le;YANG Jinteng;LI Yaxing;ZI Shuai;LUO Chen;LIU Yukun;QIAN Liwei(School of Science,Xijing University,Xi'an,Shaanxi Province,710123;China Pulp and Paper Research Institute Co.,Ltd.,Beijing,100102;Shaanxi Collaborative Innovation Center of Industrial Auxiliary Chemistry&Technology,National Demonstration Center for Experimental Light Chemistry Engineering Education,Shaanxi University of Science&Technology,Xi'an,Shaanxi Province,710021)

机构地区：[1]西京学院理学院,陕西西安710123 [2]中国制浆造纸研究院有限公司,北京100102 [3]陕西科技大学陕西省工业辅助化学与技术协同创新中心,轻化工程国家级实验教学示范中心,陕西西安710021

出　　处：《中国造纸学报》2021年第3期34-42,共9页Transactions of China Pulp and Paper

基　　金：国家自然科学基金项目(21805177);陕西科技大学开放基金(XTKF-2019-06);西京学院特区人才基金(XJ18T03);陕西省教育厅一般专项科研计划项目(21JK0955)。

摘　　要：采用超声脱墨技术纯化废报纸(WNP),将得到的脱墨纤维素纤维在碱溶剂体系中溶解并交联再生制备纤维素气凝胶(WNCA),最后通过化学接枝法制备了聚(1-乙烯基-3-丁基咪唑溴盐)聚合物刷修饰的纤维素气凝胶吸附剂(WNCA-g-PBVIMBr);研究了WNCA-g-PBVIMBr的化学结构与物理形貌,探索了其对染料酸性橙Ⅱ (AO Ⅱ)的吸附性能与吸附机理。结果表明,WNCA表面均匀接枝了平均分子质量为3780 g/mol的PBVIMBr聚合物刷,其对AO Ⅱ的最大吸附容量为351 mg/g,吸附过程符合准二级动力学模型和Langmuir等温吸附模型,且化学吸附起主导作用。In this study,the waste newspaper(WNP)was purified via ultrasonic deinking to obtain the deinked cellulose fiber which was then dissolved in alkaline solvent system and cross-linked to prepare regenerated cellulose aerogel(WNCA).The poly(1-vinyl-3-butylimidazole bromide)brush modified cellulosic aerogel adsorbent(WNCA-g-PBVIMBr)was obtained by chemical grafting.The chemical structure and physical morphology of WNCA-g-PBVIMBr were studied,and the adsorption performance and mechanism towards acid orange Ⅱ(AO Ⅱ)were explored as well.The results showed that the PBVIMBr polymer brush with an average molecular weight of 3780 g/mol was uniformly grafted on the surface of WNCA,of which the maximum adsorption capacity towards AO Ⅱ could reach 351 mg/g.The adsorption process conformed to the pseudo-second-order kinetic model and Langmuir adsorption isotherm model,indicating chemical adsorption played a key role in the adsorption process.

关 键 词：废报纸 气凝胶 接枝改性 吸附 酸性橙Ⅱ 

分 类 号：TS72[轻工技术与工程—制浆造纸工程] TQ352[化学工程]