Paint Recycling for End-of-Life Construction Cladding

背景：该项目将与贝克尔斯合作进行，贝克尔斯拥有150多年的历史，是提供独特，高质量解决方案的真正先驱，可满足许多行业的涂料需求。研究：卷材涂料的主要用途之一是用于建筑建筑的外墙面板。将涂层涂在连续的宽金属带上，然后进行热处理，以诱导凝胶或交联。使用的化学物质包括聚酯/三聚氰胺，聚氨酯，PVdF和PVC塑料溶胶等。目前，由于建筑物的覆层在使用寿命结束时被移除，金属通过熔化然后重新铸造来回收。在此过程中，线圈涂层从金属中焚烧，因此丢失。目前，涂层金属板碳足迹的很大一部分是与用于制造涂层的原材料生产相关的排放。因此，如果要开发一条回收这些原材料的路线，这将大大减少线圈涂层的总碳足迹。项目描述：博士学位的具体重点将首先研究和开发低碳影响方法，化学或机械，这将支持从基材上去除寿命终止的涂层。其次，开发一种提取组成部分的方法，可以在未来的线圈涂料中重复使用。这一过程将在金属回收之前进行。期望成果：开发一种方法，从金属基材上暴露的漆膜中提取可用的卷材涂料原料。最理想的回收材料是有色或防腐色素（尤其是TiO2），以及用作粘合剂的有机聚合物。

Background:The project will be undertaken in collaboration with Beckers, which dates back over 150 years and is a true pioneer in providing unique, high-quality solutions that answer coating needs across many sectors. Research:One of the main uses of Coil Coatings is on exterior façade panels used in building construction. Coatings are applied to continuous, wide metal strip and then thermally treated so as to induce gelation or crosslinking. Chemistries used include Polyester/Melamine, Polyurethane, PVdF & PVC plastisol amongst others. Currently, as cladding is removed from buildings at the end of life the metal is recycled via melting and then re-casting. During this process the coil coating is incinerated from the metal and so is lost.Currently, a significant part of the carbon footprint of a coated metal panel is the emissions related to the production of the raw materials used to make the coating. Therefore, if a route to recover those raw materials was to be developed, this would yield a significant reduction in the total carbon footprint of the coil coating.Project Description:The specific focus of the doctorate will be firstly to investigate and develop low-carbon impact methods, chemical or mechanical, that would support the removal of the end-of-life coating from the substrate. Secondly, to develop a route to extract the constituent parts that can be reused in future Coil Coatings. This process would be carried out before the metal is then recycled.Desired outcomes:Development of a method to extract usable Coil Coating raw materials from exposed paint films that are applied to a metal substrate. The materials that would be most desirable for recovery are the coloured or anti-corrosive pigmentation (especially TiO2), and the organic polymers used as the binder.