Swelling and glyphosate-controlled release behavior of multi-responsive alginate-g-P(NIPAm-co-NDEAm)-based hydrogel. (15th April 2022)

• Record Type: Journal Article
• Authors: Zheng, Dan; Wang, Kai; Bai, Bo; Hu, Na; Wang, Honglun
• Is Part Of: Carbohydrate polymers. Volume 282(2022)
• Publication Date: 2022-04-15
• Subjects: Sodium alginate -- Controlled-release -- Stimulus-response -- Water-absorbent mechanism -- Agrochemical; Polysaccharides -- Periodicals; Polysaccharides -- Periodicals; Polysaccharides -- Périodiques; Electronic journals; 547.78
• DOI: 10.1016/j.carbpol.2022.119113
• Languages: English
• ISSNs: 0144-8617

Abstract

Abstract: Intelligent controlled release systems (ICRS) displayed great achievement in agriculture by enhancing the utilization efficiency of agrochemicals. In this work, an intelligent graft copolymer (Alg-g-P(NIPAm- co -NDEAm)) with alginate (Alg) backbone and thermo-responsive poly(N-isopropyl acrylamide- co -N, N-diethylacrylamide) (P(NIPAm-co-NDEAm)) side chain was constructed as the matrix of ICRS through redox copolymerization, and its thermo-induced responsive property was studied. Then, the copolymer was mixed with a promising photothermal material semi-coke (SC) to form hydrogel beads (Ca-Alg-g-P(NIPAm-co-NDEAm)/SC) by ion crosslinking. The water absorbency of beads under different stimuli (pH, temperature, and light) presented outstanding responsive performance and the swelling mechanism was analyzed through coupling theory. Furthermore, the release of glyphosate (Gly) from Ca-Alg-g-P(NIPAm-co-NDEAm)/SC under environmental stimuli displayed regulatable behaviors. This multi-responsive hydrogel bead shows bright prospect in the sustainable advancement of crop production. Graphical abstract: Unlabelled Image