School of Chemistry and Chemical Engineering, Northeast Petroleum University, 163318 Daqing, China.
J Colloid Interface Sci. 2013 Jul 15;402:253-8. doi: 10.1016/j.jcis.2012.11.011. Epub 2012 Nov 29.
A simple engineering method was used to fabricate stability and wear-resistance of superhydrophobic PPS-based PPS/PTFE surfaces through nano/micro-structure design and modification of the lowest surface energy groups (-CF2-), which was inspired by the biomimic lotus leaves. The hydrophobic properties and wear-resistance of the coatings were measured by a contact angle meter and evaluated on a pin-on-disk friction and wear tester, respectively. Moreover, the surfaces of the PPS/PTFE composite coatings were investigated by means of scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), X-ray diffractometry (XRD), and thermogravimetry (TG) analysis. Results showed that the highest contact angle of the PPS/PTFE surface, with papillae-like randomly distributed double-scale structure, could reach up to 162°. When 1 wt.% PDMS was added, the highest contact angle could hold is 172°. The coatings also retained superhydrophobicity, even under high temperature environment. The investigation also indicated that the coatings were not only superhydrophobic but also oleophobic behavior at room temperature, such as the crude oil, glycerol, and oil-water mixture. The PPS/45%PTFE coatings had more stable friction coefficient and excellent wear-resistance (331,407 cycles) compared with those with less than 45% of PTFE.
采用简单的工程方法，通过纳米/微观结构设计和对最低表面能基团（-CF2-）的改性，模仿荷叶的自洁性能，制备了具有超疏水性、稳定性和耐磨性的基于 PPS 的 PPS/PTFE 表面。通过接触角测量仪测量涂层的疏水性和耐磨性，并在销盘式摩擦磨损试验机上进行评估。此外，还通过扫描电子显微镜（SEM）、傅里叶变换红外光谱（FT-IR）、X 射线衍射（XRD）和热重分析（TG）对 PPS/PTFE 复合涂层的表面进行了研究。结果表明，具有乳突状随机分布的双尺度结构的 PPS/PTFE 表面的最高接触角可达 162°。当添加 1wt.% PDMS 时，最高接触角可保持在 172°。即使在高温环境下，涂层仍保持超疏水性。研究还表明，涂层不仅在室温下具有超疏水性，而且具有疏油性，如原油、甘油和油水混合物。与 PTFE 含量低于 45%的涂层相比，PPS/45%PTFE 涂层具有更稳定的摩擦系数和优异的耐磨性（331,407 个循环）。
