Poly(urea-urethane) nanoparticles using mono- and diacylglycerol from glycerolysis of castor oil as biopolyol and stabilizer
| Autor: | Daniela Bresolin, Claudia Sayer, Alexsandra Valério, Débora de Oliveira, Pedro Henrique Hermes de Araújo, Vinícius Mazurek |
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| Rok vydání: | 2018 |
| Předmět: |
chemistry.chemical_classification
Polymers and Plastics Organic Chemistry General Physics and Astronomy 02 engineering and technology Polymer Raw material 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Miniemulsion chemistry.chemical_compound Monomer chemistry Polymerization Chemical engineering Castor oil Glycerolysis Materials Chemistry medicine Particle size 0210 nano-technology medicine.drug |
| Zdroj: | European Polymer Journal. 108:529-535 |
| ISSN: | 0014-3057 |
| DOI: | 10.1016/j.eurpolymj.2018.09.044 |
| Popis: | Vegetable oils as renewable raw materials for polymer synthesis are considered a clean and environment-friendly alternative to substitute partially, and to some extent totally, petroleum-based monomers. In this work, enzymatic glycerolysis of castor oil with Novozym 435 (C. antarctica lipase B) as catalyst was performed in a solvent-free system at 70 °C. The glycerolysis product was used as biopolyol and stabilizer for the synthesis of poly(urea-urethane) (PUU) nanoparticles via miniemulsion polymerization. Results showed that the PUU particles size increased with solids content and z-average particle diameters ranging from 167 to 282 nm when the solids content was increased from 20 to 40 wt%. All lattices were stable towards sedimentation, although the latex with lower particle size exhibited a higher stability. Thereby, this work showed a green route to produce stable PUU lattices from renewable resources without the use of any additional surfactant. |
| Databáze: | OpenAIRE |
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