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Polymers 2015, 7(11), 2431-2445; doi:10.3390/polym7111522

Preparation and Characteristics of Corn Straw-Co-AMPS-Co-AA Superabsorbent Hydrogel

1,†,* , 1,2,†,* , 3
and
4
1
State Key Laboratory Cultivation Base of Mining Disaster Prevention and Control, College of Mining and Safety Engineering, Shandong University of Science and Technology, Qingdao 266590, China
2
College of Resources and Environmental Engineering, Binzhou University, Binzhou 256603, China
3
Key Lab of Gas and Fire Control for Coal Mines of Ministry of Education, Faculty of Safety Engineering, China University of Mining and Technology, Xuzhou 221116, China
4
College of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, China
These authors contributed equally to this work.
*
Authors to whom correspondence should be addressed.
Academic Editor: Antonio Pizzi
Received: 20 September 2015 / Revised: 3 November 2015 / Accepted: 13 November 2015 / Published: 24 November 2015
View Full-Text   |   Download PDF [11979 KB, uploaded 25 November 2015]   |  

Abstract

In this study, the corn straw after removing the lignin was grafted with 2-acrylamido-2-methylpropanesulfonic acid (AMPS) to prepare sulfonated cellulose. The grafting copolymerization between the sulfonated cellulose and acrylic acid (AA) was performed using potassium persulfate and N,N′-methylenebisacrylamide as the initiator and crosslinking agent, respectively, to prepare corn straw-co-AMPS-co-AA hydrogels. The structure and properties of the resulting hydrogels were characterized by Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy, thermogravimetric analysis, and dynamic rheometry. The effects of initiator, crosslinker, monomer neutralization degree, and temperature on the swelling ratio of the hydrogels were studied. The water retention, salt resistance, and recyclability of the corn straw-co-AMPS-co-AA hydrogels were also investigated. The optimum water absorptivity of the corn straw hydrogels was obtained at a polymerization temperature of 50 °C with 1.2% crosslinker, 1:7 ratio of the pretreated corn straw and AA, 2% initiator, and 50% neutralized AA. View Full-Text
Keywords: corn straw; sulfonated cellulose; superabsorbent hydrogel; acrylic acid; water absorption corn straw; sulfonated cellulose; superabsorbent hydrogel; acrylic acid; water absorption
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Cheng, W.-M.; Hu, X.-M.; Wang, D.-M.; Liu, G.-H. Preparation and Characteristics of Corn Straw-Co-AMPS-Co-AA Superabsorbent Hydrogel. Polymers 2015, 7, 2431-2445.

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