Design of New Polyacrylate Microcapsules to Modify the Water-Soluble Active Substances Release
| Autor: | Giuseppe Cappelletti, Eleonora Pargoletti, Hermes Farina, Valentina Sabatini, Alessandro Stori, Laura Pellicano, Marco Aldo Ortenzi, Luisa Annunziata |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
chemistry.chemical_classification
Acrylate polyacrylate Polymers and Plastics Radical polymerization General Chemistry Polymer Article Pickering emulsion water-based latex lcsh:QD241-441 chemistry.chemical_compound lcsh:Organic chemistry chemistry Chemical engineering Methacrylic acid Copolymer microencapsulation Methacrylamide Methyl methacrylate controlled release |
| Zdroj: | Polymers, Vol 13, Iss 809, p 809 (2021) Polymers; Volume 13; Issue 5; Pages: 809 Polymers |
| ISSN: | 2073-4360 |
| DOI: | 10.3390/polym13050809 |
| Popis: | Despite the poor photochemical stability of capsules walls, polyacrylate is one of the most successful polymers for microencapsulation. To improve polyacrylate performance, the combined use of different acrylate-based polymers could be exploited. Herein butyl methacrylate (BUMA)-based lattices were obtained via free radical polymerization in water by adding (i) methacrylic acid (MA)/methyl methacrylate (MMA) and (ii) methacrylamide (MAC) respectively, as an aqueous phase in Pickering emulsions, thanks to both the excellent polymer shells’ stability and the high encapsulation efficiency. A series of BUMA_MA_MMA terpolymers with complex macromolecular structures and BUMA_MAC linear copolymers were synthesized and used as dispersing media of an active material. Rate and yield of encapsulation, active substance adsorption onto the polymer wall, capsule morphology, shelf-life and controlled release were investigated. The effectiveness of the prepared BUMA-based microcapsules was demonstrated: BUMA-based terpolymers together with the modified ones (BUMA_MAC) led to slow (within ca. 60 h) and fast (in around 10 h) releasing microcapsules, respectively. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|