Evaluation of carbon fiber surface treated by chemical and cold plasma processes

Materials Research

Liliana Burakowski Nohara¹  Gilberto Petraconi Filho²  Evandro Luís Nohara²  Maurício Urban Kleinke²  Mirabel Cerqueira Rezende² 

[1] ,Instituto Tecnológico de Aeronáutica Departamento de Engenharia Aeronáutica e Mecânica São José dos Campos SP ,Brazil

关键词: carbon fibers;    chemical treatment;    cold plasma;    functional groups;   

DOI  :  10.1590/S1516-14392005000300010

来源: SciELO

【 摘 要 】

Sized PAN-based carbon fibers were treated with hydrochloric and nitric acids, as well as argon and oxygen cold plasmas, and the changes on their surfaces evaluated. The physicochemical properties and morphological changes were investigated by atomic force microscopy (AFM), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), tensile strength tests and Raman spectroscopy. The nitric acid treatment was found to cause the most significant chemical changes on the carbon fiber surface, introducing the largest number of chemical groups and augmenting the roughness. The oxygen plasma treatments caused ablation of the carbon fiber surface, removing carbon atoms such as CO and CO2 molecules. In addition, the argon plasma treatment eliminated defects on the fiber surface, reducing the size of critical flaws and thus increasing the fiber's tensile strength.

【 授权许可】

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