Comparison of the effect of oxygen and nitrogen plasma treatments on the surface activation of PLA/rGO composites
Behnamghader A, Poostchi M, Hosseinpour S (2024)
Publication Type: Journal article
Publication year: 2024
Journal
Book Volume: 51
Article Number: 104741
DOI: 10.1016/j.surfin.2024.104741
Abstract
Cold plasma is known as a method to enhance the adsorption of proteins on the surface of biomaterials. In this experimental study, the efficacy of oxygen and nitrogen plasma treatment on the activation of Poly L-lactic acid/reduced graphene oxide composite (PLAG) was investigated. For this purpose, the chemical, physicochemical, and morphological characteristics, ability to adsorb amino acid L-tyrosine, and biological behavior of the oxygen and nitrogen plasma-treated composites (PLAG-O and PLAG-N) were studied. Following the exposure to oxygen and nitrogen plasma, (PLAG-O) composites presented more enhancement in Raman C[sbnd]C and C[sbnd]H bonds. The evaluation of L-tyrosine adsorption revealed the higher intensity of FTIR C[sbnd]N, C[sbnd]C and N[sbnd]H and Raman C[sbnd]H chemical bonds and also lower intensity of L-tyrosine UV absorbance in solution medium for L-tyrosine-adsorbed oxygen plasma-treated (PLAG-Ot) compared to L-tyrosine-adsorbed nitrogen plasma-treated (PLAG-Nt) composites. More apparent L-tyrosine island-shaped zones were appeared all over the surface of PLAG-Ot composites through FE-SEM experiment. Moreover, conducting detailed AFM study revealed a higher difference in surface roughness (Ra) of the PLAG-O and PLAG-Ot (140 nm) compared to the PLAG-N and PLAG-Nt composites (25 nm). From the biological point of view, the oxygen plasma-treated composites presented better HDF cell behavior in terms of viability and attachment, as well. According to the results of this study, the oxygen plasma treatment exhibits a higher potential to activate Poly L-lactic acid–reduced graphene oxide composite surface compared to the surface treatment in nitrogen plasma.
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Iran, Islamic Republic of (IR)How to cite
APA:
Behnamghader, A., Poostchi, M., & Hosseinpour, S. (2024). Comparison of the effect of oxygen and nitrogen plasma treatments on the surface activation of PLA/rGO composites. Surfaces and Interfaces, 51. https://doi.org/10.1016/j.surfin.2024.104741
MLA:
Behnamghader, Aliasghar, Maryam Poostchi, and Saman Hosseinpour. "Comparison of the effect of oxygen and nitrogen plasma treatments on the surface activation of PLA/rGO composites." Surfaces and Interfaces 51 (2024).
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