Microsecond pulse driven Ar/CF4 plasma jet for polymethylmethacrylate surface modification at atmospheric pressure
Microsecond pulse driven Ar/CF4 plasma jet for polymethylmethacrylate surface modification at atmospheric pressure
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DOI：
10.1016/j.apsusc.2014.12.076
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发表时间：
2015-02
影响因子：
6.7
通讯作者：
Ruixue Wang;Cheng Zhang;Xiong Liu;Qing Xie;P. Yan;T. Shao
中科院分区：
文献类型：
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作者：
Ruixue Wang;Cheng Zhang;Xiong Liu;Qing Xie;P. Yan;T. Shao
采用微秒脉冲驱动等离子体射流对聚甲基丙烯酸甲酯（PMMA）进行表面改性。本文研究了不同比例的Ar和CF 4混合气体对PMMA改性的影响。等离子体处理后，将PMMA样品浸入水中以加速老化效果。用原子力显微镜和X射线光电子能谱对材料表面的形貌和元素组成进行了研究。分析了等离子体表面改性的机理。结果表明，等离子体处理后，材料表面引入了疏水基团（C-F、C-F），表面粗糙度增加。在等离子体处理的初始阶段，PMMA的接触角减小，并显示出亲水性。经不同时间的水浸泡后，含氧基团（C双键O）逐渐被C-F和C-F取代，表现出疏水性。PMMA表面粗糙度的增加和表面含氟基团的存在是导致其疏水性的主要原因。
A plasma jet driven by microsecond pulse was used for polymethylmethacrylate (PMMA) surface modification. In the paper, the effect of different proportions of Ar and CF4gas mixture on PMMA modification was studied. After plasma treatment, PMMA samples were immersed in water to accelerate the aging effect. The morphology and elemental composition of the material surface were investigated by atomic force microscopy and X-ray photoelectron spectroscopy. In addition, the mechanism for plasma surface modification has been analyzed. Results showed that plasma treatment introduced hydrophobic groups (i.e. C–Fnand C–F) into material surface and increased their surface roughness. In the initial stage of plasma treatment, the contact angle of PMMA decreased and showed a hydrophilic property. After water immersion with different time, the oxygen-containing groups (Cdouble bondO) were gradually displaced by C–Fnand C–F and showed a hydrophobic property. The increased roughness and fluoride groups on the PMMA surface were responsible for hydrophobic behavior of PMMA.