Fully Biobased Nanocomposites of Hyperbranched-Polyol and Hydroxyapatite in Coating Applications
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ORIGINAL PAPER
Fully Biobased Nanocomposites of Hyperbranched-Polyol and Hydroxyapatite in Coating Applications Amardip M. Patil1,2 · Vikas V. Gite1 · Harishchandra D. Jirimali3 · Ramanand N. Jagtap2 Accepted: 23 September 2020 © Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract Generally, the coating properties of polymeric compounds are enhanced by using nanomaterials as fillers which are nonbiobased. In this project, the hydroxyapatite (HAP) was obtained from waste fish scales and the biobased hyperbranched polyol (HyBP) was synthesized from castor oil. The series of nanocomposites were prepared by adding various amounts of HAP (0.5% wt, 1% wt, and 2% wt) in HyBP along with isophorone diisocyanate (IPDI) (maintaining the NCO:OH, ratio at 1.2:1). These mixtures were coated on mild steel panels and glass plates. The synthesized HyBP was characterized by FTIR, 1HNMR, and 13CNMR techniques. The HAP was characterized by FTIR, FESEM, and XRD techniques. The surface morphology of prepared nanocomposites was studied by FESEM, XRD, and AFM techniques. The nanoparticle size was determined by TEM technique. The thermal behavior of nanocomposites was studied by TGA technique. The coating properties were determined by impact strength, crosscut adhesion, and flexibility test. The corrosion properties of the coatings were determined by the immersion test as well as electrochemical test.
* Amardip M. Patil [email protected] * Ramanand N. Jagtap [email protected] 1
School of Chemical Sciences, Kavayitri Bahinabai Chaudhari North Maharashtra University, Jalgaon, MS 425001, India
2
Department of Polymer and Surface Engineering, Institute of Chemical Technology (ICT), Nathalal Parekh Marg, Matunga, Mumbai, India
3
Department of Chemistry, Uka Tarsadiya University, Bardoli, Gujarat 394 350, India
13
Vol.:(0123456789)
Journal of Polymers and the Environment
Graphic Abstract
Keywords Biobased · Hyperbranched polyol · Hydroxyapatite · Nanocomposites · Coating
Introduction Generally, the linear polymers are being used in the coating applications. Hyperbranched polymers (HyBP) and dendrimers are class of dendritic polymers which offers high functional end groups [1]. HyBP and dendrimers acquire unique properties, globular architecture, high end functional groups, high solubility, high crosslink density, low solution, and melt viscosity [2, 3]. But the dendrimers are very expensive because of many subsequent steps of synthesis. Therefore, researchers have focused on HyBP which are comparatively cost-effective than dendrimers [4]. The HyBP can acquire a variety of functional groups such as hydroxyls, amines, carboxylic acids, chlorines, etc. at the terminal ends [5]. The hydroxyl groups can be used in the formation of polyurethanes which can be used in surface coatings, foam formation, high performance adhesives, surface sealants etc. Due to this, they show various types of applications in coating technology such as biomedical, drug delivery, anti-corrosive, self-healabil
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