Evaluation of biodegradability on polyaspartamide-polylactic acid based nanoparticles by chemical hydrolysis studies
| Autor: | Emanuela Fabiola Craparo, Gaetano Giammona, Barbara Porsio, Gennara Cavallaro, Maria Luisa Bondì |
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| Rok vydání: | 2015 |
| Předmět: |
Materials science
Polymers and Plastics Nanoparticle macromolecular substances Polyethylene glycol chemistry.chemical_compound Hydrolysis poly(lactic acid) (PLA) Polylactic acid ? biodegradability Materials Chemistry Organic chemistry technology industry and agriculture poly(ethylene glycol) (PEG) Biodegradation Condensed Matter Physics Lactic acid chemistry ?-poly-(N-2-hydroxyethyl)-DL-aspartamide (PHEA) Mechanics of Materials Yield (chemistry) graft copolymers nanoparticles Chemical stability Nuclear chemistry |
| Zdroj: | Polymer degradation and stability 119 (2015): 56–67. doi:10.1016/j.polymdegradstab.2015.05.003 info:cnr-pdr/source/autori:Craparo Emanuela Fabiola1 Porsio Barbara1 Bondì Maria Luisa2 Giammona Gaetano1 Cavallaro Gennara1/titolo:Evaluation of biodegradability on polyspartamide-polylactic acid based nano particles by chemical hydrolysis studies/doi:10.1016%2Fj.polymdegradstab.2015.05.003/rivista:Polymer degradation and stability/anno:2015/pagina_da:56/pagina_a:67/intervallo_pagine:56–67/volume:119 |
| ISSN: | 0141-3910 |
| DOI: | 10.1016/j.polymdegradstab.2015.05.003 |
| Popis: | Here, the synthesis of two graft copolymers based on ?,?-poly(N-2-hydroxyethyl)-D,L-aspartamide (PHEA) and poly(lactic acid) (PLA), the O-(2-aminoethyl)-O'-galactosyl polyethylene glycol (GAL-PEG-NH2) or the methoxypolyethylene glycol amine (H2N-PEG-OCH3) is described. Starting from the obtained PHEA-PLA-PEG-GAL and PHEA-PLA-PEG copolymers, polymeric nanoparticles were prepared by high pressure homogenization-solvent evaporation method. To demonstrate their biodegradability as a function of the matrix composition, a chemical stability study was carried out until 21 days by incubating systems in two media mimicking physiological compartments (pH 7.4 and pH 5.5). The degradability of both nanosystems was firstly confirmed by the reduction of the pH of the incubation medium. Moreover, the percentage yield of recovered nanoparticles show a gradual reduction while mean size increases as a function of incubation time. Degradation seems to be mainly attributed to the loss of water-soluble portions of PLA, and proceeds with greater speed at pH 5.5, than at pH 7.4 and as a function of matrix composition. KEYWORDS: ?,?-poly-(N-2-hydroxyethyl)-DL-aspartamide (PHEA), poly(lactic acid) (PLA), poly(ethylene glycol) (PEG), graft copolymers, nanoparticles, biodegradability. |
| Databáze: | OpenAIRE |
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