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Date of Publication:2004-01-01

Journal:大连理工大学学报

Affiliation of Author(s):物理学院

Volume:44

Issue:1

Page Number:31-34

ISSN No.:1000-8608

Abstract:Dielectric barrier discharge (DBD) can be applied to modify polymer surface to improve its wettability and adhesive strength. Polyethylene (PE) films are treated by DBDs in N2 and air. Atom force microscopy (AFM) and infrared spectrum (TR) are used to characterize the surface morphology and the surface chemical composition of the treated PE respectively. The analysis results indicate that the treated PE surface becomes rough and a new chemical composition appears. The comparison between N2-DBD treatment and air-DBD treatment shows that the surface water contact angle of the PE can reach 19.3° after 30 min. DBDs treatment in N2, whereas the value has a minimum of 28.7° in air DBDs treatment. Besides, the surface morphology of the N2DBD-treated PE is rougher than that of the air-DBD-treated and the transformation of the chemical composition of the N2-DBD-treated PE is larger than that of the air-DBD-treated. The possible reason for the results is that, with the increase of the treatment time, air-DBD treatment will lead to the enhancement of the degradation and etching of the PE surface, but N2-DBD treatment will induce the formation of desaturated function groups and make the surface of the treated PE rough.

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