纤维素骨架支撑的高吸水性树脂的制备及性能研究  

Preparation and Properties of Cellulose-supported Superabsorbent Resin

作　　者：李新平 张力 常慧 张召 陈立红 LI Xinping;ZHANG Li;CHANG Hui;ZHANG Zhao;CHEN Lihong(College of Bioresources Chemical and Materials Engineering,National Demonstration Center for Experimental Light Chemistry Engineering Education,Shaanxi Province Key Lab of Papermaking Technology and Specialty Paper,Shaanxi University of Science&Technology,Xi’an,Shaanxi Province,710021;State Key Lab of Pulp and Paper Engineering,South China University of Technology,Guangzhou,Guangdong Province,510640;College of Mechanical and Electrical Engineering,Shaanxi University of Science&Technology,Xi’an,Shaanxi Province,710021;Institute of Frontier Science and Technology Transfer,Shaanxi University of Science&Technology,Xi’an,Shaanxi Province,710021)

机构地区：[1]陕西科技大学轻工科学与工程学院,轻化工程国家级实验教学示范中心,陕西省造纸技术及特种纸品开发重点实验室,陕西西安710021 [2]华南理工大学制浆造纸工程国家重点实验室,广东广州510640 [3]陕西科技大学机电工程学院,陕西西安710021 [4]陕西科技大学前沿科学与技术转移研究院,陕西西安710021

出　　处：《中国造纸》2021年第2期1-12,共12页China Pulp & Paper

基　　金：国家自然科学基金(31370578,21703131);陕西省科技厅自然科学基础研究计划项目(2014JZ013);陕西省科技厅重点实验室科研计划项目(2011HBSZS014);制浆造纸工程国家重点实验室开放基金(201821)。

摘　　要：本研究以竹浆为原料,通过复合纤维素酶+低温碱尿素体系预处理得到改性竹浆纤维;然后以过硫酸钾为自由基引发剂,在N,N’-亚甲基双丙烯酰胺的作用下,将丙烯酸接枝到改性竹浆纤维上,制备了一种新型纤维素骨架支撑的高吸水性树脂(MBPF-g-PAA)。采用傅里叶变换红外光谱仪、热重分析仪、X射线衍射仪、X射线光电子能谱仪和场发射扫描电子显微镜对MBPF-g-PAA的结构和形貌进行表征。结果表明,聚丙烯酸成功接枝到竹浆纤维上,纤维素作为骨架增强了树脂内部多孔结构,树脂的吸水效果有明显改进;在优化合成条件下,MBPF-g-PAA的吸水倍率最高达980.87 g/g。此外,受金属阳离子“电荷屏蔽效应”的影响,不同阳离子盐溶液对树脂溶胀的影响依次为:Na^(+)>K^(+)>NH^(4+)>Mg^(2+)>Ca^(2+)>Fe^(3+)。In this study,the modified bamboo pulp fiber was prepared by pretreatment of complex cellulase and low temperature alkali urea system using bamboo pulp as the raw material.The potassium persulfate was as a free radical initiator,a new cellulose-supported superabsorbent resin(MBPF-g-PAA)was prepared with N,N’-methylenebisacrylamide as monomers.The structure and morphology of the resin were characterized by FT-IR,TGA,XRD,XPS,and FESEM.The results showed that polyacrylic acid was successfully grafted onto the cellulose fibers.The water absorption rate of the resin was improved obviously due to cellulose skeleton enhanced inner porous structure.Under the optimum pretreat conditions,the water absorption rate of the MBPF-g-PAA was 980.87 g/g.In addition,the swelling behaviors of the MBPF-g-PAA depended on the pH and the metal cation types of the salt solutions.Influencing by the“charge shielding effect”of metal cations,the effects of different cationic salt solutions on resin swelling rate were as follows:Na^(+)>K^(+)>NH^(4+)>Mg^(2+)>Ca^(2+)>Fe^(3+)。

关 键 词：竹浆纤维 预处理 高吸水性树脂 吸水倍率 溶胀行为 

分 类 号：TS79[轻工技术与工程—制浆造纸工程]