摘要
介质阻挡放电(DBD)处理聚合物表面可有效提高其亲水性和结合强度.利用不同工作气体(氮气和空气)的DBD对聚乙烯(PE)表面能进行改性.N2-DBD处理PE30min后其表面水接触角达到19.3°,而空气-DBD处理后最小只能达到28.7°.红外吸收光谱与原子力显微镜分析其表面发现出现新的化学基团,且形貌变得相对粗糙.随处理时间的增加,经N2-DBD和空气-DBD处理的PE无论从表面成分还是表面形貌看,前者都比后者变化程度更大.
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 N_2 and air. Atom force microscopy (AFM) and infrared spectrum (IR) 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 N_2-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 N_2, whereas the value has a minimum of 28.7° in air DBDs treatment. Besides, the surface morphology of the N_2-DBD-treated PE is rougher than that of the air-DBD-treated and the transformation of the chemical composition of the N_2-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 N_2-DBD treatment will induce the formation of desaturated function groups and make the surface of the treated PE rough.
出处
《大连理工大学学报》
EI
CAS
CSCD
北大核心
2004年第1期31-34,共4页
Journal of Dalian University of Technology
基金
国家自然科学基金资助项目(10275010).
