| Title |
Tunable enzymatic biodegradation of poly(butylene succinate): biobased coatings and self-degradable films |
| ID_Doc |
19985 |
| Authors |
Peñas, MI; Criado-Gonzalez, M; de Ilarduya, AM; Flores, A; Raquez, JM; Mincheva, R; Müller, AJ; Hernández, R |
| Title |
Tunable enzymatic biodegradation of poly(butylene succinate): biobased coatings and self-degradable films |
| Year |
2023 |
| Published |
|
| DOI |
10.1016/j.polymdegradstab.2023.110341 |
| Abstract |
Biodegradation of polyesters driven by enzymes is considered as one of the most effective way of degradation of these materials, as a way to control plastics accumulation in the environment. In this study, we present two different strategies to tune the enzymatic degradation of PBS films triggered by a lipase from Pseudomonas cepacia. Firstly, the kinetics of enzymatic degradation of PBS films was regulated by applying multilayer coats of polysaccharide alginate and chitosan (Alg/Chi) films. Secondly, self-degradable PBS films were prepared by embedding lipase-filled alginate particles. For comparison purposes, a detailed enzymatic degradation study of neat PBS films exposed to a lipase from P. cepacia in solution was made to determine the main experimental parameters influencing their degradation in solution. The results showed that an increase in enzyme concen-tration increased the degradation extent and rate of neat PBS films. At a fixed enzyme concentration, stirring of the solution containing the enzyme and the PBS also increased the biodegradation rate. In the case of the PBS films coated with a different number of Alg/Chi layers by spray-assisted LbL and subjected to enzymatic degradation experiments in solution, the extent of degradation was found to be dependent on the number of protective coating layers. Therefore, the Alg/Chi biobased coating constitutes an effective barrier to the diffusion of the lipase, thus proving its effectiveness in modulating the enzymatic activity as a function of coating thickness. In the case of self-degradable PBS containing lipase-embedded alginate beads (employed to protect the enzyme during high-temperature processing), only limited biodegradation was observed as the amount of encapsulated enzyme employed was too small. Nonetheless, these results are promising, as the enzymatic activity -indicative of the degradation capacity of the enzyme- determined for all these samples was about 2 orders of magnitude lower than that of previous assays. |
| Author Keywords |
Poly(butylene succinate); Enzymatic degradation; Pseudomonas cepacia; Biodegradation modulation; Self-degradation; Polysaccharide polyelectrolyte complexes |
| Index Keywords |
Index Keywords |
| Document Type |
Other |
| Open Access |
Open Access |
| Source |
Science Citation Index Expanded (SCI-EXPANDED) |
| EID |
WOS:000957557000001 |
| WoS Category |
Polymer Science |
| Research Area |
Polymer Science |
| PDF |
https://doi.org/10.1016/j.polymdegradstab.2023.110341
|