Jatropha seed oil derived poly(esteramide-urethane)/ fumed silica nanocomposite coatings for corrosion protection

Abstract

Jatropha oil [JO] based poly (esteramide-urethane) coatings embedded with fumed silica nanoparticles were prepared. JO was converted to N,N-bis(2-hydroxy ethyl) JO fatty amide (HEJA) and was further modified by a tetrafunctional carboxylic acid(trans 1,2 diaminocyclo-hexane-N,N,N’,N’,-tetraacetic acid) to form poly (diamino cyclohexane esteramide) (PDCEA). PDCEA was then treated with toluene 2,4-diisocynate and fumed silica to prepare poly(diamino cyclohexane urethane esteramide) (PUDCEA) nanocomposite. The formation of PDCEA and PUDCEA nanocomposites was confirmed by FTIR, 1H &13C NMR spectroscopic techniques. The thermal behavior and morphology of PUDCEA nanocomposite coatings were investigated by TGA/DTG, DSC, SEM, EDX spectroscopy. PUDCEA nanocomposites were applied on carbon steel and their coatings were produced at room temperature. The properties of these nanocomposite coatings were investigated by standard analytical methods. The PUDCEA-3 nanocomposite showed good anticorrosion and physico-mechanical performance. These naocomposite coatings can be employed safely upto 200oC.

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

“…Alam et al designed an anticorrosive PEsA polyol by replacing typical dicarboxylic acids with EDTA [ 62 ], ethylene glycol tetraacetic acid [ 124 ], and itaconic acid/ trans -1,2-diaminocyclohexane-N,N,N′,N′,-tetraacetic acid [ 46 , 154 ], employing LO, PO, and JO, respectively. The PU coatings prepared from EDTA and trans -1,2-diaminocyclohexane-N,N,N′,N′-tetraacetic acid-based polyols have a combination of amine groups, ester groups, urethane groups, and pendant alkyl chains.…”

“…The PU coatings prepared from EDTA and trans -1,2-diaminocyclohexane-N,N,N′,N′-tetraacetic acid-based polyols have a combination of amine groups, ester groups, urethane groups, and pendant alkyl chains. JO-derived poly(esteramide urethane)/fumed silica nanocomposite PU coatings were demonstrated by Alam et al, which showed good adhesion, hardness, gloss, and anticorrosive properties [ 154 ]. NO-based PEsA polyols were also prepared for self-healing anticorrosive PU coatings, where polyamidoamine-based polyurea microcapsules were filled with LO [ 28 ].…”

“…Various nanofillers, such as fumed silica, TiO 2 , ZnO, and Fe 2 O 3 NPs, have been reported in NEVO-based polyols and PUs [ 112 , 118 , 149 , 150 , 154 ]. PU with silver (Ag)-doped hydroxyapatite (HAP) NPs and the PEsA polyol were prepared from AO and ricinoleic acid, exhibiting anticorrosion characteristics ( Table 4 , Figure 11 ) [ 104 ].…”

New modified poly(ester amide) resins and their uses as a binder for surface coating with different applications

“…In addition, it has also shown intermediate inhibition against further gram negative bacteria (P.aeruginosa) (Khane et al , 2016). Poly (ester-amide urethane) coatings based on Jatropha oil embedded with fumed silica nano-particles, have been prepared and the physico-mechanical and corrosion resistance results indicated that the modified nano-composite coatings showed the desirable properties of a mild steel substrate (Alam et al , 2019). Vegetable oil-based poly (ester-amide)s are essentially amide modified alkyds, which show improved coating film properties when compared alongside normal alkyds.…”