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Preparation and Properties of Cellulose-supported Superabsorbent Resin
Received:September 21, 2020  
DOI：10.11980/j.issn.0254-508X.2021.02.001
Key Words:bamboo pulp cellulose  pretreatment  superabsorbent resin  water absorption rate  swelling behaviors
Fund Project: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）。
Author NameAffiliationPostcode
LI Xinping 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 710021
ZHANG Li 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 710021
CHANG Hui College of Mechanical and Electrical Engineering， Shaanxi University of Science & Technology， Xi’an， Shaanxi Province，710021 710021
ZHANG Zhao 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 		510640
CHEN Lihong Institute of Frontier Science and Technology Transfer， Shaanxi University of Science & Technology， Xi’an， Shaanxi Province， 710021 710021
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Abstract: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+ > NH4+ > Mg2+ > Ca2+ > Fe3+.
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