The waterborne soy oil epoxy (WSOE) has attracted significant interest due to its eco-friendly and low or no volatile organic compounds (VOCs) being free. Further, it is one of the promising precursors used to formulate low-cost, eco-friendly, high-performance anti-corrosive coatings. Because of this, the present study reports the synthesis of waterborne soy epoxy and its nanocomposite coatings formulation using soy oil epoxy and sebacic acid as a modifier (a green bio-based precursor) and reduced graphene oxide (RGO) nanofillers. The sebacic acid was used to modify waterborne oleo epoxy through salt formation, making the epoxy more bio-compatible and environment-friendly. The structural characterization of these materials was performed using X-ray diffraction, proton and carbon thirteen-NMR, and Raman spectroscopies (XRD, FT-IR, 13CNMR, 1HNMR, Raman). The graphene-epoxy nanocomposite coatings have exhibited superior thermal, physicomechanical, and corrosion protective (impedance = 106 omega cm2 and phase angle = 78o) properties. The potentiodynamic polarization and electrochemical impedance spectroscopy techniques were used to investigate the anticorrosive activities of nanocomposite and soy epoxy coatings. The physicomechanical studies on nanocomposite coatings have displayed excellent performance i.e. Impact resistance (150 lb./in.), scratch resistance (11 kg) and MEK tests (> 400 cycles), and superior corrosion protective properties as compared to those of soy epoxy and other such reported coating systems.

Vegetable oil (VO)-based waterborne (WB) polymeric nanocomposite coatings emerged as important alternatives to the petro-based polymers due to increasing pressure to limit detrimental health and environmental effects. In this approach, the toxic and expensive volatile organic solvents are replaced by water as an environmentally benign solvent, resulting in minimal volatile organic contents. WB polymeric (WBP) nanocomposites have attracted great attention in the field of anticorrosive coating materials due to the synergistic effect of polymeric matrix and nanofillers. This chapter deals with the classification of WBPS, various synthetic approaches, advantages, and shortcomings. In addition, the chapter also elaborated on the various VO-based WBPS in the field of anticorrosive nanocomposite coatings. The future perspectives in the development of WB polymers are also discussed.

The ongoing progress in the development of biopolymeric nanocomposite hydrogels (NCHs) has been an area of active research in the field of biomedical applications especially in drug delivery and tissue engineering. New development in nanotechnology has emphasized the diverse use of NCHs and gained much attention in the biomedical and pharmaceutical industry due to their remarkable properties at the nanoscale level. the novelties of the discovery of NCHs comprise new methodologies toward the fabrication and modification of hydrogels by using various nanofillers with plan polymeric hydrogel matrices. This chapter focuses on biodegradable polymer-based NCHs and also gives an insight into the advancement of biodegradable polymeric NCHs for biomedical applications.

The continuous quest for green and sustainable polymeric material has become a topic of interest. In this context, nonisocyanate polyurethanes (NIPU) materials are considered the best being ecofriendly and nontoxic in nature and have attracted great deal of attention as compared to the conventional polyurethane (PU) obtained from petroleum resources and isocyanates. This review article first highlights the importance of NIPU over the conventional PU. The review further discusses the summary of different synthetic approaches for partial green polyurethane (GPU), which was produced using vegetable oil and isocyanates. Further, to remove the shortcomings of isocyanates and to produce complete GPU, the production of NIPU has been discussed in detail. The recent literatures on the advancement in NIPU have also discussed in this review along with their properties and applications in the various fields. Furthermore, the future prospects of NIPU have also been portrayed here.

Vegetable oils (VOs) are superabundant, economic, nontoxic, and biodegradable resource, which are applied for surface coatings for the last two decades. Moreover, the adaptation of the ultramodern techniques coupled with the VOs-based sustainable polymers in the field of surface coatings shows an outstanding physicochemical, physicomechanical, electrical, and thermal properties. On account of this, the present chapter focuses on the classifications, properties, and modifications of the sustainable polymers. Past decade, the theory of environment friendly, solventless, UV curable, waterborne (WB), and hyperbranched (HPs) coatings that are developed from sustainable resources have been discussed. The chapter further highlights the modification of VO-based polymers and their nanocomposites for enduring sustainable and green future. Moreover, the future scopes of these polymers have also been discussed in detail.

RGO dispersed waterborne soy polyester amide nanocomposites were formulated utilizing a solventless VOC free green approach for use as low cost anticorrosive coatings.

The waterborne soya alkyd (WSA) and its RGO dispersed nanocomposites (WSA-RGO) were synthesized via ex situ polymerization using a solvent-less green approach. The soya oil monoglyceride was used as precursor for waterborne alkyd. The synergistic effect of nanofillers and poly melamine coformaldehyde isobutylated solution modified organic matrix (WSA) on physicomechanical and corrosion inhibition of these coatings on finally polished carbon steel (CS) was investigated. Their physicochemical, physicomechanical, and thermal properties were analyzed using standard protocols. The electrochemical corrosion measurements of these coatings were performed using Potentiodynamic Polarization and Electrochemical Impedance Spectroscopy. The aforementioned studies revealed that the nanocomposite coatings exhibit promising corrosion protection performance which is evident from the i(corr) E-corr, impedance and phase angle values of coatings (i.e., i(corr) 7.736 x 10(-9) Acm(-2), E-corr -0.191 V, impedance similar to 10(7) Omega cm(2), and phase angle 86 degrees). These results suggest that the proposed waterborne nanocomposite coatings exhibit superior corrosion protection property than those of other such earlier reported systems.