Kaczorowski Witold, Batory Damian, Szymański Witold, Lauk Klaudia, Stolarczyk Jakub
Institute of Material Science and Engineering, Faculty of Mechanical Engineering, Lodz University of Technology, Stefanowskiego 1/15, 90-537 Lodz, Poland.
Department of Vehicles and Fundamentals of Machine Design, Faculty of Mechanical Engineering, Lodz University of Technology, Stefanowskiego 1/15, 90-537 Lodz, Poland.
Materials (Basel). 2022 May 29;15(11):3883. doi: 10.3390/ma15113883.
The plasma modification of polydimethylsiloxane (PDMS) substrates is one way to change their surface geometry, which enables the formation of wrinkles. However, these changes are very often accompanied by the process of restoring the hydrophobic properties of the modified material. In this work, the RF PACVD device (radio frequency plasma-assisted chemical vapor deposition) was used, with which the plasma treatment of PDMS substrates was carried out in argon, nitrogen, oxygen, and methane atmospheres at variable negative biases ranging from 100 V to 500 V. The obtained results show the stability of contact angles for deionized water only in the case of surfaces modified by diamond-like carbon (DLC) coatings. The influence of the applied production conditions on the thickness (between 10 and 30 nm) and chemical structure (ID/IG between 0.41 and 0.8) of DLC coatings is discussed. In the case of plasma treatments with other gases introduced into the working chamber, the phenomenon of changing from hydrophilic to hydrophobic properties after the modification processes was observed. The presented results confirm the barrier nature of the DLC coatings produced on the PDMS substrate.
聚二甲基硅氧烷（PDMS）基底的等离子体改性是改变其表面几何形状的一种方法，这使得皱纹得以形成。然而，这些变化常常伴随着改性材料疏水性能恢复的过程。在这项工作中，使用了射频等离子体辅助化学气相沉积（RF PACVD）装置，通过该装置在氩气、氮气、氧气和甲烷气氛中，于100 V至500 V的可变负偏压下对PDMS基底进行等离子体处理。所得结果表明，仅在类金刚石碳（DLC）涂层改性的表面上，去离子水的接触角具有稳定性。讨论了所应用的生产条件对DLC涂层厚度（10至30 nm）和化学结构（ID/IG在0.41至0.8之间）的影响。在向工作室引入其他气体进行等离子体处理的情况下，观察到改性过程后从亲水性转变为疏水性的现象。所呈现的结果证实了在PDMS基底上制备的DLC涂层的阻隔性质。
