Influence of Hybrid Sol-Gel Crosslinker on Self-Healing Properties for Multifunctional Coatings

Abstract

Self-healing polymers are a new class of material that has recently received a lot of attention because of the lifespan improvement it could bring to multiple applications. One of the major challenges is to obtain multifunctional materials which can self-heal and exhibit other interesting properties such as protection against corrosion. In this paper, the effect of the incorporation of an aminosilane on the properties of a self-healing organic polymer containing disulfide bond is studied on films and coatings for aluminium AA2024-T3 using simple one step in situ synthesis. Hybrid coatings with enhanced anticorrosion properties measured by EIS were obtained thanks to the formation of a protective oxide interface layer, while exhibiting wound closure after exposition at 75 °C. The thermal, mechanical and rheological properties of the films with different aminosilane amounts were characterized in order to understand the influence of the slight presence of the inorganic network. Stiffer and reprocessable hybrid films were obtained, capable to recover their mechanical properties after healing. The nanocomposite structure, confirmed by TEM, had a positive effect on the self-healing and stress relaxation properties. These results highlight the potential of sol-gel chemistry to obtain efficient anticorrosion and self-healing coatings.

The influence of structural topology of additively manufactured PEGDA monolith on adsorption performance for textile wastewater treatment

“…The silane‐crosslinked and grafted monolith was prepared via epoxide amide reaction with a mixture of chitosan and hybrid alkoxysilanes precursors acting as crosslinker. A hybrid silane agent was selected as it can increase the thermal and mechanical properties of the materials through a siloxane inorganic network and an organic function linked to the same silicon atom, which can interact with or create an organic polymeric network 34 . Briefly, a formulation of silane agent that consists of GPTMS and APTMS was mixed with IPA and DI water at ratio of 3:1:6:1 as described by Zhang et al 35 for 5 min in a beaker.…”

“…A hybrid silane agent was selected as it can increase the thermal and mechanical properties of the materials through a siloxane inorganic network and an organic function linked to the same silicon atom, which can interact with or create an organic polymeric network. 34 Briefly, a formulation of silane agent that consists of GPTMS and APTMS was mixed with IPA and DI water at ratio of 3:1:6:1 as described by Zhang et al 35 for 5 min in a beaker. For the formation of silane-crosslinked chitosan, 1 ml of hybrid silane mixture was added into 10 ml of 2 wt% of chitosan (pH $5-6) and continuously stir until the mixture became homogenous as shown in Figure 2.1b.…”

Effectiveness of Bonding Steel Elements with Polyester-Coated Paint

“…Among the types of materials joined by adhesive bonding, both steels [10,21,25,26,32] and metal alloys, including aluminum alloys [11,25,31], are worth mentioning. One of the possibilities is also the bonding of materials on the surfaces of which various types of coatings are applied (e.g., for anti-corrosion protection), including, e.g., elements with different types of coatings [5,[41][42][43][44].…”

Influence of Surface Treatment on Steel Adhesive Joints Strength—Varnish Coats

“…Many structures use various types of the protective and the protective-decorative coats, including the paint coats. The various types of the coatings both protect the materials against the effects of the aggressive factors [8][9][10][11][12][13][14] and constitute a base (layer) for further adhesive processes (promote the adhesion), including bonding [15,16].…”