Plasma surface treatments of poly(l-lactic acid) (PLLA) and poly(hydroxybutyrate-co-hydroxyvalerate) (PHBV) |
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| Authors: | BMP Ferreira LMP Pinheiro PAP Nascente MJ Ferreira EAR Duek |
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| Affiliation: | 1. Centro de Ciências Médicas e Biológicas, Pontifícia Universidade Católica de São Paulo, Praça Dr. José Ermírio de Moraes, 290, CEP 18030-230, Sorocaba, SP, Brazil;2. Departamento de Engenharia de Materiais, Universidade Federal de São Carlos, Rodovia Washington Luís Km 235, CEP 13565-905, São Carlos, SP, Brazil;3. Laboratório Nacional de Luz Síncrotron, Rua Giuseppe Máximo Scolfaro, 10000, CEP 13084-971, Campinas, SP, Brazil |
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| Abstract: | The surfaces of poly(l-lactic acid) (PLLA) and poly(hydroxybutyrate-co-hydroxyvalerate) (PHBV) were modified by oxygen and nitrogen plasma treatments. The physical and chemical surface characteristics were evaluated by contact angle tests, scanning electron microscopy (SEM), atomic force microscopy (AFM), and X-ray photoelectron spectroscopy (XPS). The plasma treatments caused an increase in both contact angle and roughening, altered the surface morphology, inserted polar groups, and, consequently, enhanced the hydrophilicity for both PLLA and PHBV polymers. |
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