Waterborne butyl methacrylate (co)polymers prepared by pickering emulsion polymerization: Insight of their use as coating materials for slow release-fertilizers
نویسندگان
چکیده
A new approach for preparing slow-release membranes encapsulated diammonium phosphate (DAP) fertilizer with waterborne polymers is presented. Latex dispersions based on butyl methacrylate (BMA) and 2-(perfluorohexyl)ethyl acrylate (PFA) were successfully synthesized by emulsion (co)polymerization using starch nanocrystals (SNC) as a sole pickering surfactant. conversion degree around 98% was reached, while the solid content close to 20 wt%. The particle diameter distribution of PBMA homopolymer P(BMA-co-PFA) copolymer well water contact angle measurements thermal properties investigated showed that incorporation PFA units in enhanced stability hydrophobic character copolymer. use these (co)polymers coatings explored. Scanning Electronic Microscopy (SEM), Diffraction X-ray (EDX) mapping performed study morphology coated granules revealed formation cohesive film good adhesion between DAP coating films. evaluation release nutrients (N, P) monitored UV–Vis spectroscopy. Compared uncoated which total obtained after less than 2 h, P profiles fertilizers reached equilibrium stage 28 50 h when P(BMA-co-FPA), respectively. Indeed, time reach maximum N concentration 13.5 16.0 times lower corresponding covered These results indicated significant slower (P N) enhance efficiency minimize adverse environmental effects, match nutrient demand during crop growth.
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ژورنال
عنوان ژورنال: European Polymer Journal
سال: 2021
ISSN: ['0014-3057', '1873-1945']
DOI: https://doi.org/10.1016/j.eurpolymj.2021.110598