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Enzymatic Self-Degradable PLA-Based Electrets

  • In recent years, the demand for sustainable and degradable materials and electronic devices has increased significantly. Among a range of biodegradable polymers, poly(lactic acid) (PLA) is a good alternative to conventional petrol-based polymers because of its attractive mechanical properties and its easy processability. Recently, PLA has also been described as a promising dielectric material with piezoelectric and electret properties. We expect that PLA—after further optimization— will play an important role as a material for environmentally friendly sensors in the future, where first applications such as air filters and pressure sensors have already been proposed. However, degradation under normal ambient conditions is very slow, and an accelerated and controllable degradation process is highly desirable for any type of PLA-based sensors. Enzymatic hydrolysis with embedded enzymes has been proposed as an approach to accelerate and control degradation. In this work, we investigate the properties of PLA in terms of dielectric and mechanical properties with a focus on its ability to store charges after the enzyme proteinase K (Trit. album) has been incorporated. Results reveal that proteinase K has a positive effect on the charge stability of solvent-cast PLA electrets after complete evaporation of the solvent. Furthermore, we observed a concentration-dependent acceleration of mass loss in a Tris-HCl buffer. A fast degradation within only one day occurred at a concentration of 6 wt% proteinase K.

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Metadaten
Author:Dennis Flachs, Sergey Zhukov, Isabella Zech, Timo Schreck, Stefan Belle, Heiinz von Seggern, Mario Kupnik, Alexander Anton Altmann, Christiane Thielemann
DOI:https://doi.org/Journal of https://doi.org/10.1007/s10924-024-03240-6
Parent Title (English):Journal of Polymers and the Environment
Document Type:Article
Language:English
Year of Completion:2024
Date of first Publication:2024/03/01
Release Date:2024/03/11
GND Keyword:Biologisch abbaubarer Kunststoff
Volume:2024
Issue:1
First Page:1
Last Page:11
Urheberrecht:1
Institutes:Fakultät Ingenieurwissenschaften / Labore / BIOMEMS Lab
research focus :Materials / Material Testing & Sensor Technology
Reviewed:ja
Licence (German):Creative Commons - CC BY - Namensnennung 4.0 International
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