Wang Lijuan, Liang Jinsheng, Di Xingfu, Tang Qingguo
J Nanosci Nanotechnol. 2014 May;14(5):3822-6. doi: 10.1166/jnn.2014.7985.
The cleanability of easy-to-clean ceramic glazes doped with nanometer far-infrared materials was compared with that of some high-quality household ceramic glazes from the market. The cleanability was evaluated by the contact angle measurement using a sessile drop method with a Dataphysics OCA-30 contact angle analyzer. The results showed that the difference of contact angles of water on the glazes before soiling and after cleaning could be used as a parameter for evaluating the cleanability of the glazes. The relationship between cleanability and surface properties, such as surface free energy and surface topography, was investigated. The surface free energy of the samples and their components were calculated using van Oss acid-base approach. By measuring advancing and receding contact angles, the contact angle hysteresis of the ceramic glazes due to the surface topography was investigated. It was shown that the cleanability of ceramic glazes containing nanometer far-infrared materials (NFIM) is better than that of household ceramic glazes from market, due to a higher ratio of electron-acceptor parameter to electron-donor parameter, which led to the effect of water hydration as well as better hydrophilic property and increased smoothness. The contact angle measurement not only accurately evaluates the cleanability of the ceramic glazes, but also has a contribution to the study of cleanability theory. Moreover, this method is simple, convenient and less sample-consumption.
将掺杂纳米远红外材料的易清洁陶瓷釉料的清洁性能与市场上一些高品质家用陶瓷釉料的清洁性能进行了比较。使用Dataphysics OCA - 30接触角分析仪通过静滴法测量接触角来评估清洁性能。结果表明，污染前后釉料表面水接触角的差值可作为评估釉料清洁性能的一个参数。研究了清洁性能与表面性质（如表面自由能和表面形貌）之间的关系。采用范奥氏酸碱方法计算样品及其组分的表面自由能。通过测量前进接触角和后退接触角，研究了陶瓷釉料因表面形貌引起的接触角滞后现象。结果表明，含纳米远红外材料（NFIM）的陶瓷釉料的清洁性能优于市场上的家用陶瓷釉料，这是由于电子受体参数与电子供体参数的比值较高，导致了水合作用以及更好的亲水性和表面光滑度的提高。接触角测量不仅能准确评估陶瓷釉料的清洁性能，而且对清洁性能理论的研究也有贡献。此外，该方法简单、方便且耗材少。
