NANO2021-Nanoteknologi og nye materiale

CARBCOATPRO-prosjektet har siktet på å utvikle innovative miljøvennlige antikorrosive forbehandlinger, grunninger og toppstrøk for å drastisk forbedre langtidsytelsen for metallsubstrater. Teknologien i fokus gikk ut på å inkorporere additiver av layered double hydroxide/karbon nanorør i funksjonaliserte polyhedral oligomeric silsesquioxane (POSS)-belegg for å oppnå beskyttelse mot korrosiv skade og øke mekanisk styrke. I perioden 01.10.2017-31.21.2018, optimaliserte SINTEF stabiliteten av POSS-baserte formuleringer. Formuleringene viste økt stabilitet. Utvalgte formuleringer viste god kompatibilitet med grunnningen og toppbelegget. Formuleringene ble anvendt på Al og testet av prosjektpartneren Hydro. Flere av beleggene passerte testene; de viste god adhesjon til Al, god løsningsmiddelbestandighet, passende fleksibilitet og god korrosjonsbeskyttelse. Formuleringene som ble testen at prosjektpartneren Maier/Cidetec viste behov for videreutvikling. POSS-baserte formuleringer med antimikrobiske egenskaper ble testet at prosjektpartneren SMT, og de viste et potensial. De mest lovende formuleringene evalueres for mulig produksjon. Alle aktivitetene har blitt utført i henhold til prosjektplanen.

The new coatings developed in CARBCOATPRO showed excellent adhesion, good flexibility, good solvent resistance and good corrosion protection on Al substrates. The promising coatings showed potentials to replace existing primers at Hydro. The cost of the coatings is considered within acceptable range. We aimed to develop environmentally friendly smart coating systems loaded with additives for corrosion protection. The environmentally benign materials have been selected as components for coating formulation. In addition, appropriate materials handling routines have been followed, aiming to reduce environmental impact of the materials. The promising environmentally-green products developed in CARBCOATPRO will contribute to economic benefits to the industries with less harmful impacts on both the environment and the society. The new systems also contributed to a safe, responsible and sustainable coating technology in terms of process, coating materials, and lifetime cycles.

The CARBCOATPRO project aims at developing innovative environmentally friendly anticorrosive pretreatment, primers and top coatings to improve radically the long-term performance of metallic substrates. The key technology in focus is based on formation and functionalization of multifunctional layered double hydroxide (LDH)/carbon nanotube (CNT) additives, which will be incorporated into functionalized polyhedral oligosilsesquioxane (POSS) based coatings. The main targeted functionalities of the new additives and coatings are primarily to enhance mechanical reinforcement, hydrophobicity, antimicrobial properties and both passive and active protection against corrosive damage. The later functionality will be introduced via ion-exchange incorporation of corrosion inhibitors within LDH structures grown directly on the CNT structures. The activation of the anticorrosion functionality on demand will be achieved utilising intrinsic smart release properties of LDHs (i.e. self-healing ability) under various external triggers such as presence of corrosive anions. Combination of disciplines like corrosion, chemistry and colloidal science with coating technology will be a main aspect in this project. CARBCOATPRO focuses on three main applications, namely automotive, building and aeronautical. The active LDH/CNT coatings can bring significant benefits when applied in these situations. The main expected impacts are improved products (additives and modified formulations) with respect to current existing technologies (technical performance) taking into consideration the ecological impact by reducing the use of hazardous materials and compounds and the sustainability of developed technology throughout the life cycle (environmental aspects).The main benefit is to develop innovative coatings for corrosion-prevention of metallic structures, having self-healing ability and being environmental friendly.