Nanocomposite coatings obtained by sol-gel for adhesion and protection against cor...
| Grant number: | 18/26447-5 |
| Support type: | Scholarships in Brazil - Master |
| Effective date (Start): | November 01, 2019 |
| Effective date (End): | October 31, 2021 |
| Field of knowledge: | Engineering - Aerospace Engineering |
| Principal Investigator: | Luciana de Simone Cividanes Coppio |
| Grantee: | Amanda Alvarenga Coutinho Silva |
| Home Institution: | Divisão de Ciências Fundamentais (IEF). Instituto Tecnológico de Aeronáutica (ITA). Ministério da Defesa (Brasil). São José dos Campos , SP, Brazil |
Abstract Aluminum alloy is one of the materials that is on the rise in the aerospace, space and automotive sectors, replacing the commonly used steels. It is common to use anodizing and chromatizing processes as surface treatment of these alloys, to improve their adhesion and protection against corrosion. However, they are imported processes with high toxicity. Among the most promising alternatives for replacing these processes are siloxane sol-gel systems. Thus, the objective of this work is the development of siloxane sol-gel films (tetraethoxysilane-TEOS and 3-glycidoxypropyl trimethoxysilane-GPTMS) and epoxy resin for adhesion of aluminum substrates. Five variables that may influence the metal-metal bonding efficiency will be evaluated using experimental design and with the aid of the test tape and shear tests: solvent type, curing agent type, amount of GPTMS, time after preparation of the film for application to the substrate and composition of adhesive layers deposited on the substrate. Further analysis, such as differential scanning calorimetry, infrared spectroscopy, viscosity testing and microscopy will provide support for better understanding of the results. The understanding of how each variable influences the physico-chemical properties of the films and their adhesion efficiency, as well as the correlation between the results, will be fundamental for an improvement of the synthesis and application processes of the sol-gel adhesives for the metal-metal bonding, replacing the currently used methods, which are imported and have high toxicity. | |