Journal
CARBOHYDRATE POLYMERS
Volume 125, Issue -, Pages 376-383Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2015.03.004
Keywords
Starch-based hydrogel; Controlled-release; Water absorption; Carbendazim; RateCarbendazim (Pub Chem CID:25429); Acrylic acid (PubChem CID:6581); Starch (PubChem CID:439341); Acrylamide (PubChem CID:6579); Methyl methacrylate (PubChem CID:6658)
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Funding
- National Natural Science Foundation of China [11275170]
- National High Technology Research and Development Program of China (863 Program) [2013AA065202]
- Chinese Ministry of Agriculture Foundation [201103007]
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Starch, with properties of eco-friendliness and abundance, is one of the most important natural polymers. Starch-based hydrogels were investigated as carriers of carbendazim to combine controlled-release and water absorption (WA). Three carbendazim-loaded hydrogels (CLHs) with different WA capacities were prepared by solution polymerization. The CLHs were characterized by Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), and liquid-chromatography mass-spectrometry (LC-MS/MS). Release kinetics of CLHs was investigated using C-14-labeling method. The diffusion parameters of CLHs were 0.47, 0.57 and 0.81 in deionized H2O (ddH(2)O). WA affected release profile significantly, the release longevity reaching 240h when WA was 800 g/g in ddH(2)O. Solution pH influenced release profiles and the lowest release rate occurred in the lowest pH. Addition of CLH (1.3 g/kg soil) markedly increased water-holding capacity (WHC) of soil by 8.2%. The study indicated that starch-based CLH was a good controlled-release agent for carbendazim and water absorbent for soil. (C) 2015 Elsevier Ltd. All rights reserved.
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