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Title: Study of High-Density Polyethylene (HDPE) kinetics modification treated by Dielectric Barrier Discharge (DBD) plasma
Authors: Feitor, Michelle Cequeira
Medeiros Neto, João Freire de
Souza, Ivan Alves de
Targino, Talita Galvão
Diniz, Gutembergy Ferreira
Libório, Maxwell Santana
Sousa, Rômulo Ribeiro Magalhães
Costa, Thércio Henrique de Carvalho
Keywords: DBD plasma;HDPE;Langmuir;wettability
Issue Date: 21-Oct-2020
Publisher: MDPI
Citation: MEDEIROS NETO, João Freire de; SOUZA, Ivan Alves de; FEITOR, Michelle Cequeira; TARGINO, Talita Galvão; DINIZ, Gutembergy Ferreira; LIBÓRIO, Maxwell Santana; SOUSA, Rômulo Ribeiro Magalhães; COSTA, Thercio Henrique de Carvalho. Study of High-Density Polyethylene (HDPE) Kinetics Modification Treated by Dielectric Barrier Discharge (DBD) Plasma. Polymers, [S.l.], v. 12, n. 10, p. 2422, 21 out. 2020. Disponível em: Acesso em: 14 abr. 2021.
Portuguese Abstract: In this work, the plasma was used in the dielectric barrier discharge (DBD) technique for modifying the high-density polyethylene (HDPE) surface. The treatments were performed via argon or oxygen, for 10 min, at a frequency of 820 Hz, voltage of 20 kV, 2 mm distance between electrodes, and atmospheric pressure. The efficiency of the plasma was determined through the triple Langmuir probe to check if it had enough energy to promote chemical changes on the material surface. Physicochemical changes were diagnosed through surface characterization techniques such as contact angle, attenuated total reflection to Fourier transform infrared spectroscopy (ATR-FTIR), X-ray excited photoelectron spectroscopy (XPS), and atomic force microscopy (AFM). Plasma electronics temperature showed that it has enough energy to break or form chemical bonds on the material surface, impacting its wettability directly. The wettability test was performed before and after treatment through the sessile drop, using distilled water, glycerin, and dimethylformamide, to the profile of surface tensions by the Fowkes method, analyzing the contact angle variation. ATR-FTIR and XPS analyses showed that groups and bonds were altered or generated on the surface when compared with the untreated sample. The AFM showed a change in roughness, and this directly affected the increase of wettability
ISSN: 2073-4360
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CT - DET - Artigos publicados em periódicos
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