Atmospheric Plasma Treatment of Carbon Fibers for Enhancement of Their Adhesion Properties

Autor(es)

Santos, Alberto Lima ^[1] ; Botelho, Edson Cocchieri ^[1] ; Kostov, Konstantin G. ^[2] ; Nascente, Pedro A. P. ^[3] ; da Silva, Leide Lili G. ^[4]

Afiliação do(s) autor(es)

^[1] Sao Paulo State Univ UNESP, Dept Mat & Technol, BR-12516410 Sao Paulo - Brazil

^[2] Sao Paulo State Univ UNESP, Dept Chem & Phys, BR-12516410 Sao Paulo - Brazil

^[3] Fed Univ Sao Carlos UFSCar, Dept Mat Engn, BR-13565905 Sao Carlos, SP - Brazil

^[4] Technol Fac Pindamonhangaba FATEC, BR-12455010 Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: IEEE TRANSACTIONS ON PLASMA SCIENCE; v. 41, n. 2, p. 319-324, FEB 2013.
• Citações Web of Science: 14

Resumo

Plasma processing of carbon fibers (CFs) is aimed to provide better contact and adhesion between individual plies without decrease in the CF mechanical resistance. This paper deals with surface modification of CFs by an atmospheric pressure dielectric barrier discharge (DBD) for enhancing the adhesion between the CF and the polymeric matrix. The scanning electron microscopy of the treated samples revealed many small particles distributed over entire surface of the fiber. These particles are product of the fiber surface etching during the DBD treatment that removes the epoxy layer covering as-received samples. The alteration of the CF surface morphology was also confirmed by the Atomic force microscopy (AFM), which indicated that the CF roughness increased as a result of the plasma treatment. The analysis of the surface chemical composition provided by X-ray photoelectron spectroscopy showed that oxygen and nitrogen atoms are incorporated onto the surface. The polar oxygen groups formed on the surface lead to the increasing of the CF surface energy. The results of interlaminar shear strength test (short beam) of CFs/polypropylene composites demonstrated a greater shear resistance of the composites made with CFs treated by DBD than the one with untreated fibers. Both the increase in surface roughness and the surface oxidation contribute for the enhancement of CF adhesion properties. (AU)

• Processo FAPESP: 09/13843-0 - Estudo da superfície de fibras de carbono após tratamentos a plasma por descarga de barreira dielétrica (DBD)
• Beneficiário: Alberto Lima Santos
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica
• Processo FAPESP: 07/03714-3 - Tratamento interfacial de compósitos termoplásticos e de carbono vítreo através de técnicas assistidas por plasma para aplicações aeroespacial, eletroquímica e biomédica
• Beneficiário: Leide Lili Gonçalves da Silva Kostov
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores