In Vitro Degradation of Specimens Produced from PLA/PHB by Additive Manufacturing in Simulated Conditions
| Autor: | Jana Klímová, Jozef Feranc, Gabriela Ižaríková, Marcel Modrák, Jozef Živčák, Marianna Trebuňová, Radovan Hudák, Ľuboš Kaščák, Lukáš Mitrík, Alena Findrik Balogová |
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| Rok vydání: | 2021 |
| Předmět: |
polyhydroxybutyrate
Materials science Polymers and Plastics Organic chemistry 02 engineering and technology scaffold 010402 general chemistry 01 natural sciences biodegradation Article chemistry.chemical_compound QD241-441 Polylactic acid Composite material Porosity polylactic acid Triacetin chemistry.chemical_classification Plasticizer biomaterial Biomaterial General Chemistry Polymer 3D printing Biodegradation 021001 nanoscience & nanotechnology 0104 chemical sciences chemistry Absorption (chemistry) 0210 nano-technology |
| Zdroj: | Polymers Polymers, Vol 13, Iss 1542, p 1542 (2021) Volume 13 Issue 10 |
| ISSN: | 2073-4360 |
| Popis: | Biopolymers have been the most frequently studied class of materials due to their biodegradability, renewability, and sustainability. The main aim of the presented study was to evaluate degradability of the polymer material blend which was immersed in different solutions. The present study included the production of three different mixtures of polylactic acid and polyhydroxybutyrate, each with a different content of triacetin, which was used as a plasticiser. Applying 3D printing technology, two types of cylindrical specimen were produced, i.e., a solid and a porous specimen, and subjected to in vitro natural degradation. The biodegradation process ran for 195 days in three different solutions (saline, phosphate-buffered saline (PBS), and Hank’s solution) in stable conditions of 37 °C and a pH of 7.4, while the specimens were kept in an orbital motion to simulate the flow of fluids. The goal was to identify the effects of a solution type, specimen shape and material composition on the biodegradation of the materials. The monitored parameters included changes in the solution quantity absorbed by the specimens morphological changes in the specimen structure and mechanical properties. They were measured by compressive testing using the Inspekt5 Table Blue testing device. The experiment revealed that specimen porosity affected the absorption of the solutions. The non-triacetin materials exhibited a higher mechanical resistance to compression than the materials containing a plasticiser. The final result of the experiment indicated that the plasticiser-free specimens exhibited higher values of solution absorption, no formation of block cracks or bubbles, and the pH values of the solutions in which these materials were immersed remained neutral for the entire experiment duration furthermore, these materials did not reduce pH values down to the alkaline range, as was the case with the solutions with the plasticiser-containing materials. Generally, in applications where high mechanical resistance, earlier degradation, and more stable conditions are required, the use of non-plasticiser materials is recommended. |
| Databáze: | OpenAIRE |
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