Lu Kuan-Wei, Lin Yu-Tian, Wei Hung-Sen, Kuo Chien-Cheng
Department of Optics and Photonics, Thin Film Technology Center, National Central University, 300, Chung Da Rd., Chung Li, Taoyuan 32001, Taiwan.
Materials (Basel). 2022 Jun 22;15(13):4411. doi: 10.3390/ma15134411.
Superhydrophilicity performs well in anti-fog and self-cleaning applications. In this study, polycarbonate substrate was used as the modification object because of the low surface energy characteristics of plastics. Procedures that employ plasma bombardment, such as etching and high surface free energy coating, are applied to improve the hydrophilicity. An organic amino silane that contains terminal amine group is introduced as the monomer to perform plasma polymerization to ensure that hydrophilic radicals can be efficiently deposited on substrates. Different levels of hydrophilicity can be reached by modulating the parameters of plasma bombardment and polymerization, such as plasma current, voltage of the ion source, and bombardment time. The surface of a substrate that is subjected to plasma bombarding at 150 V, 4 A for 5 min remained superhydrophilic for 17 days. After 40 min of Ar/O2 plasma bombardment, which resulted in a substrate surface roughness of 51.6 nm, the plasma polymerization of organic amino silane was performed by tuning the anode voltage and operating time of the ion source, and a water contact angle < 10° and durability up to 34 days can be obtained.
超亲水性在防雾和自清洁应用中表现出色。在本研究中，由于塑料的低表面能特性，聚碳酸酯基材被用作改性对象。采用诸如蚀刻和高表面自由能涂层等等离子体轰击程序来提高亲水性。引入含有末端胺基的有机氨基硅烷作为单体进行等离子体聚合，以确保亲水性自由基能够有效地沉积在基材上。通过调节等离子体轰击和聚合的参数，如等离子体电流、离子源电压和轰击时间，可以达到不同程度的亲水性。在150 V、4 A下进行5分钟等离子体轰击的基材表面在17天内保持超亲水性。在进行40分钟的Ar/O2等离子体轰击（导致基材表面粗糙度为51.6 nm）后，通过调节离子源的阳极电压和操作时间进行有机氨基硅烷的等离子体聚合，可获得水接触角<10°且耐久性高达34天的效果。
