Journal
SENSORS AND ACTUATORS A-PHYSICAL
Volume 295, Issue -, Pages 113-124Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.sna.2019.05.040
Keywords
Polymer nanocomposite; Hydrolytic degradation; Sensing behavior; Electrical conductivity
Ask authors/readers for more resources
This paper describes the hydrolytic degradation and sensing behavior of poly (lactic acid) (PLA)/poly (ethylene oxide) (PEO)/carbon nanotubes (CNTs) nanocomposites in neutral phosphate-buffered saline (PBS) solution. Degradation sensing is performed based on the variations of electrical conductivity due to the degradation of PLA and PEO phases. The molecular weights of polymers, the morphologies of polymer blends and nanocomposites, the chemical bonds and the crystalline structures of polymers are analyzed before and during the degradation process. CNTs promote the degradation of PLA/PEO blends and the conductivity of all samples improves with increased degradation time. The samples with high PEO and CNTs concentrations exhibit a considerable sensing, because they show a large variation in conductivity during degradation. A matrix-droplet structure forms in the samples before and after degradation, where PEO particles are dispersed in a continuous PLA phase. Both amorphous and crystalline regions of PEO experience the hydrolytic degradation, but CNTs largely control the crystallinity of PLA suggesting the localization of CNTs in the PLA phase. (C) 2019 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available