Nonsolvent-induced dewetting of thin polymer films.
Nonsolvent-induced dewetting of thin polymer films.
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DOI：
10.1021/la700805f
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发表时间：
2007-08
期刊：
影响因子：
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通讯作者：
Lin Xu;T. Shi;L. An
中科院分区：
文献类型：
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作者：
Lin Xu;T. Shi;L. An
以水为非溶剂，研究了聚苯乙烯（PS）薄膜在亲水表面上的非溶剂诱导脱湿过程。据观察，非溶剂诱导的去湿过程是很大的不同，从以前的其他去湿过程。研究发现PS膜处于非粘性状态。非溶剂诱导脱湿机理按渗透、置换、聚结的顺序进行推导，与以往的脱湿机理不同。从热力学和动力学两方面对实验结果进行了分析，以支持理论假设。
The process of nonsolvent-induced dewetting of thin polystyrene (PS) films on hydrophilic surfaces at room temperature has been studied by using water as a nonsolvent. It is observed that the process of nonsolvent-induced dewetting is greatly different from other previous dewetting processes. The PS film is found in nonviscous state in our study. A mechanism of nonsolvent-induced dewetting is deduced in an order of penetration, replacement, and coalescent, and it is different from other previous dewetting mechanisms. The results of experiments are analyzed from thermodynamics and dynamics to support the hypothetical mechanism.