Synthesis of cassava starch-g-acrylic acid/dimethylaminopropyl methacrylamide: A new hydrogel for brine solution

Zimin Wang; Haixin Shi; Feng Wang; Airong Wang; Qiang He; Shanshan Cuan

doi:10.1016/j.carbpol.2021.118109

Synthesis of cassava starch-g-acrylic acid/dimethylaminopropyl methacrylamide: A new hydrogel for brine solution

Carbohydr Polym. 2021 Aug 15:266:118109. doi: 10.1016/j.carbpol.2021.118109. Epub 2021 Apr 24.

Authors

Zimin Wang¹, Haixin Shi², Feng Wang¹, Airong Wang¹, Qiang He³, Shanshan Cuan³

Affiliations

¹ College of Petroleum and Chemical Engineering, Beibu gulf University, Qinzhou, Guangxi 535011, China.
² College of Petroleum and Chemical Engineering, Beibu gulf University, Qinzhou, Guangxi 535011, China. Electronic address: shihaixin2006@163.com.
³ School of Chemistry and Chemical Engineering, Guangxi University, Nanning, Guangxi 530004, China.

PMID: 34044927
DOI: 10.1016/j.carbpol.2021.118109

Abstract

A new hydrogel copolymer was synthesized via the graft copolymerization of acrylic acid (AA) and dimethylaminopropyl methacrylamide (DMAPMA) on cassava starch (CSt) in aqueous solution. FTIR, TGA-FTIR, solid-state ¹³C NMR, SEM analyses were used to characterize the polymer. The swelling behavior of the polymer was investigated in distilled water and in various brine solutions. The effects of CSt and the ratio of the two monomers on the water absorbency of the polymer was evaluated. CSt improved the polymer swelling properties. Both polyelectrolyte and anti-polyelectrolyte effects occurred and the polymer had good salt-resistance properties in brine solutions. Such polymers have potential applications in the absorption of ultra-high concentration brine solutions.

Keywords: Anti-polyelectrolyte effect; Hydrogel; Starch; Zwitterionic polymer.