Oleophilic non-stick coatings through surface structures for cookware

根据本领域的现状，厨具使用主要基于多氟碳化合物的不粘涂层或表现出憎油特性的溶胶-凝胶涂层。或者，使用光亮的钢或珐琅，它们表现出亲油性，但不会产生任何不粘效果。为了抵消这些临界点，激光表面结构化和有机硅不粘涂层(PECVD工艺)的组合正在被提出的研究项目中进行。主要目标是在烹饪用具，特别是平底锅的演示器中创造一种亲油不粘涂层。两个科学目标是调查的中心。其一是增加对激光参数与所用结构的机械和形态特性之间的关系的了解。这些激光诱导的非周期结构(NPS)提供了一种很有前途的方法来创建亲油表面，从而促进油的均匀和快速分布，尽管温度较高，而且持续可用。此外，结构的几何和力学性能预计会对结构-涂层的相互作用产生影响。另一方面，应开发一种具有高热稳定性和机械稳定性以及低表面能的等离子体聚合物涂层。与以前使用的涂料相比，这种涂料是一种独特的创新，因为它不含全氟辛酸(PFOA)和其他全氟羧酸，通常用于生产聚四氟乙烯(PTFE，商标名Teflon®)和其他含氟聚合物，作为不粘涂料生产中的辅助剂。众所周知，全氟辛酸在环境中不会降解，因此这些物质被称为永久化学品。对于全氟辛烷磺酸和全氟辛烷磺酸，其生产、使用、投放市场和作为一种物质本身以及在混合物和物品(产品)中的进口因此在欧盟被禁止，但有几个例外，今后将被进一步禁止。

According to the current state of the art, either non-stick coatings based predominantly on polyfluorocarbons or sol-gel coatings and thus exhibiting an oleophobic character are used for cookware. Alternatively, bright steels or enamels are used, which exhibit an oleophilic property but do not lead to any non-stick effect. To counteract these critical points, the combination of surface structuring by laser and an organosilicon non-stick coating (PECVD process) is being pursued in the proposed research project. The primary goal is to create an oleophilic non-stick coating in a demonstrator for cookware, in particular pans. Two scientific objectives are at the center of the investigations. One is to increase the understanding of the relationship between the laser parameters and the mechanical as well as morphological properties of the structure used. These laser-induced non-periodic structures (NPS) offer a promising approach to create an olephilic surface that promotes homogeneous and rapid distribution of the oil despite elevated temperatures and its continuous availability. Moreover, the geometrical and mechanical properties of the structure are expected to have an influence on the structure-coating interaction. On the other hand, a plasma polymer coating with high thermal as well as mechanical stability, as well as a low surface energy should be developed. This coating represents a unique innovation compared to previously used coatings, as it is free of perfluorooctanoic acid (PFOA) and other perfluorinated carboxylic acids commonly used to produce polytetrafluoroethylene (PTFE, commercial name Teflon®) and other fluorine-containing polymers as auxiliaries in the manufacture of non-stick coatings. It is known that PFOA does not degrade in the environment and therefore these substances are referred to as eternity chemicals. For PFOS and PFOA, their production, use, placing on the market and import as a substance itself, as well as in mixtures and articles (products) are thereby banned in the EU with a few exceptions and will be further banned in the future.