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论文类型：期刊论文

发表时间：2016-05-15

发表刊物：JOURNAL OF COLLOID AND INTERFACE SCIENCE

收录刊物：SCIE、EI、PubMed

卷号：470

页面范围：221-228

ISSN号：0021-9797

关键字：Superhydrophobic; Superhydrophilic; Surface modification; Plasma; Atmospheric pressure; Aging

摘要：Plasma hydrophilizing of superhydrophobic substrates has become an important area of research, for example, superhydrophobic-(super)hydrophilic patterned surfaces have significant practical applications such as lab-on-chip systems, cell adhesion, and control of liquid transport. However, the stability of plasma-induced hydrophilicity is always considered as a key issue since the wettability tends to revert back to the untreated state (i.e. aging behavior). This paper focuses on the stability of plasma treated superhydrophobic surface under different ambient conditions (e.g. temperature and relative humidity). Water contact angle measurement and X-ray photoelectron spectroscopy are used to monitor the aging process. Results show that low temperature and low relative humidity are favorable to retard the aging process and that pre-storage at low temperature (-10 degrees C) disables the treated surface to recover superhydrophobicity. When the aging is performed in water, a long-lasting hydropholicity is obtained. As the stability of plasma-induced hydrophilcity over a desired period of time is a very important issue, this work will contribute to the optimization of storage conditions of plasma treated superhydrophobic surfaces. (C) 2016 Elsevier Inc. All rights reserved.