Mixed Solvent Induced Dewetting of Polystyrene Thin Film
Mixed Solvent Induced Dewetting of Polystyrene Thin Film
复制标题
混合溶剂诱导聚苯乙烯薄膜的去湿
DOI：
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
An Li-Jia
中科院分区：
文献类型：
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作者：
Tong Shu-Yuan;Xu Lin;Shi Tong-Fei;An Li-Jia
利用光学显微镜和原子力显微镜研究了水和丙酮混合溶剂对聚苯乙烯薄膜脱湿过程的影响。通过改变混合溶剂中丙酮和水的比例，发现在亲水性基底上，随着丙酮体积分数的减小，R-exp（t/tau）先减小，R-t再减小，最后R-t（0.76）减小。此外，当丙酮在混合溶剂中的体积分数进一步降低时，脱湿机理由成核-生长转变为渗透-置换。而在疏水基底上，R-exp（t/tau）先增大，R-t再增大，最后R-t（0.72）增大，空穴生长机制仍为成核生长机制。但PS的滑移效应在亲水性和疏水性基底上均有效。
We investigated the dewetting process of PS film induced by mixed solvent of water and acetone with the method of OM and AFM. By changing the proportion between acetone and water in the mixed solvent, it was found that on the hydrophilic substrate, with the decreasing of volume fraction of acetone, first R-exp(t/tau), then R-t, and at last R-t(0.76). Besides, when the volume fraction of acetone in mixed solvent further decreased, the dewetting mechanism changed from nucleation and growth to penetration-replacement. While on hydrophobic substrate, first R-exp(t/tau), then R-t, at last R-t(0.72), and the mechanism of hole growth was still nucleation and growth mechanism. But the slippage effect of PS was valid on both hydrophilic substrate and hydrophobic substrate.