Nonedible Vegetable Oil-Based Polyols in Anticorrosive and Antimicrobial Polyurethane Coatings

Abstract

This review describes the preparation of nonedible vegetable oil (NEVO)-based polyols and their application in anticorrosive and antimicrobial polyurethane (PU) coatings. PUs are a class of versatile polymers made up of polyols and isocyanates. Renewable vegetable oils are promising resources for the development of ecofriendly polyols and the corresponding PUs. Researchers are interested in NEVOs because they provide an alternative to critical global food issues. The cultivation of plant resources for NEVOs can also be popularized globally by utilizing marginal land or wastelands. Polyols can be prepared from NEVOs following different conversion routes, including esterification, etherification, amidation, ozonolysis, hydrogenation, hydroformylation, thio-ene, acrylation, and epoxidation. These polyols can be incorporated into the PU network for coating applications. Metal surface corrosion and microbial growth are severe problems that cause enormous economic losses annually. These problems can be overcome by NEVO-based PU coatings, incorporating functional ingredients such as corrosion inhibitors and antimicrobial agents. The preferred coatings have great potential in high performance, smart, and functional applications, including in biomedical fields, to cope with emerging threats such as COVID-19.

A Response Surface Methodology to Optimize the Vield of Alkyd Resin from Jatropha (Jatropha Curcas) and Sesame (Sesamum İndicum) Seed Oils Using CaCO3 as Catalyst

“…Ibrahim, et al [25], previously reported an alkyd resin production range of 2.56-23.93 %. However, when compared to the results for ordinary alkyd resin production in the literature [26][27][28][29][30][31][32][33][34][35], the optimized experimental yields reported in this work were both greater. We were able to obtain a successful combination of input variables using the Box-Behnken Design Response Surface Methodology, which resulted in better yields and quality that were comparable to commercially available alkyd resins, resulting in the study's novel outcomes.…”

Synthesis and Evaluation of Alkyd Resins from Underutilized (Delonix Regia and Theventia Peruviana) Seed Oils

“…Finally, the solid was vacuum-dried. After dissolving in a mixture of toluene and ethanol (1:1), the acid value of in-process samples taken at intervals was determined by titrating with a 0.1 M KOH solution to the phenolphthalein end point [9].…”

“…Each sample was weighed into conical flasks at a weight of 5 g. Each of the solvents was added separately in 5 mL increments, and the mixture was vigorously shaken. The solubility of each mixture was measured after it had been allowed to stand for 1 hour at room temperature [9].…”

“…In Table (2), a comparison of the dark-brown in colored TPOAR and DROAR that were produced to a commercially manufactured alkyd (colorless) are shown. The alkyd's deepening color could be attributed to high reaction temperatures, oxidation, and the catalyst [9]. The iodine values of the alkyd resins prepared (DROAR and TPOAR) were discovered to have 133.87 and 80.115 mgKOH/g as compared to 161.395 and 104.41mg KOH/g.…”

“…Plant seeds of delonix regia and theventia peruviana have rekindled interest in the search for sustainable alkyd resins production as a viable alternative to imported because of their availability as they largely grow in poor soils. Ezugwu and Ezugwu [9] reported that many applications of delonix regia and theventia peruviana seeds have been used for cleansers, cosmetics, medications, oils, surfactants, but their benefits in the production of surface coatings, alkyd resins and paints are scanty in the literature [10].…”