Sunflower oil-based hyperbranched alkyd/spherical ZnO nanocomposite modeling for mechanical and anticorrosive applications

Abstract

Approaches for designing advanced nanomaterials with hyperbranched architectures and lack of volatile organic content (VOC) have attracted considerable attention. In this study, eco-friendly hyperbranched alkyd resins for mechanical and anticorrosive coatings with high solid content were successfully synthesized based on sunflower oil (SFO) via a polyesterification approach. These resins are characterized by energy-efficient polymer synthesis, lack of gelation properties, high functionality, and low viscosity. A chemical precipitation process was used to fabricate zinc oxide (ZnO) spherical nanostructures with controlled diameters and morphologies. A series of conformal, novel, low-cost SFO-based hyperbranched alkyd/spherical ZnO nanocomposites were fabricated through an ex situ method. Various nanofiller concentrations were distributed to establish synergetic effects on the micronano binary scale performance of the materials. The features of the nanocomposites, including the molecular weight, acid and hydroxyl values of the prepared alkyd resins, were concomitantly assessed through various standard tests. The nanocomposites were also subjected to various tests to determine their surface adhesion and mechanical properties, such as impact, T-bending, crosscut, and abrasion resistance tests. Furthermore, the physico-mechanical properties, anticorrosive behavior, thermal stabilities and cellular cytotoxicities of the fabricated materials were assessed. The anticorrosive features of the nanocomposites were investigated through salt spray tests in 5 wt% NaCl. The results indicate that well-dispersed ZnO nanospheres (0.5%) in the interior of the hyperbranched alkyd matrix improve the durability and anticorrosive attributes of the composites; thus, they exhibit potential applications in ecofriendly surface coatings.Scheme 1 (A) Synthesis of the hydroxyl-terminated hyperbranched polyester through the A 2 + B 3 methodology; (B) schematic of the SFO-based hyperbranched alkyd resin formed from the prepared polyester and SFO.Scheme 2 Preparation of ZnO nanospheres through a precipitation technique using DEG and PEG as stabilizers, chelating agents and limiting agents for NP growth.

Effect of branching in hyperbranched alkyd on the performance of alkyd polyurethane coating

“…Water borne hyperbranched unsaturated polyester for impregnation coating have also been reported by Wang et al . Recently, different hyperbranched polymer like poly(cyanurate amine) and hyperbranched alkyd based zinc oxide nanocomposite material are used in advanced coating material to achieve better mechanical and anti‐corrosive property . However, the effect of branching on the properties of such polyurethane coating has not been reported properly.…”

Superhydrophobic Self-cleaning Surfaces in Nature

“…Moreover, the International Maritime Organization (IMO, 2003) banned the use of tinrelated compounds for fouling resistance on ship hull coatings. The worldwide ban accompanied by utilizing toxic antifouling paints have driven modern research toward eco-friendly solutions particularly, FR technology [61][62][63][64][65][66][67] . Controlling the size and morphology of nanomaterials can improve the performance of nanocomposite [68][69][70] .…”

Synergistic effect of copolymeric resin grafted 1,2-benzisothiazol-3(2H)-one and heterocyclic groups as a marine antifouling coating

“…[14][15][16] This type of coating is mainly suitable for ocean going ships, and its antifouling performance is highly dependent on sailing time and ship speed. For further improve the antifouling performance and environmental protection performance, graed antifouling functional group antifouling material, 17 amphiphilic polymer-based antifouling material, 18 biodegradable polymer-based antifouling material, 19,20 main chain degradable self-polishing antifouling materials, 21,22 low surface energy antifouling materials, 23,24 bionic antifouling materials, 25,26 and nanocomposite antifouling materials [27][28][29][30] have become current research hotspots. It should be pointed out that most of the various technologies are currently in the laboratory research stage and have excellent anti-pollution effects, but they are still facing some difficulties in practical application.…”