Synthesis and characterization of hybrid films obtained by sol-gel with addition of GPTMS and epoxy resin for aluminum adhesion

• Grant number: 18/26447-5
• Support Opportunities: Scholarships in Brazil - Master
• Start date: November 01, 2019
• End date: July 31, 2021
• Field of knowledge: Engineering - Aerospace Engineering
• Principal Investigator: Luciana de Simone Cividanes Coppio
• Grantee: Amanda Alvarenga Coutinho Silva
• Host 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. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

COUTINHO SILVA, AMANDA ALVARENGA; GOMES, THAYNA IPOLITO; PEREIRA MARTINS, BRENDA DIANE; RIVERO GARCIA, RENATA BATISTA; CIVIDANES, LUCIANA DE SIMONE; KAWACHI, ELIZABETE YOSHIE. New Insights in Adhesive Properties of Hybrid Epoxy-Silane Coatings for Aluminum Substrates: Effect of Composition and Preparation Methods. Journal of Inorganic and Organometallic Polymers and Materials, v. 30, n. 8, FEB 2020. (18/26447-5, 19/13723-7)