Affiliations 

  • 1 Advanced Materials Center, Faculty of Engineering, University of Malaya, Malaysia, 50603 Kuala Lumpur, Malaysia
  • 2 Institute of Ocean and Earth Sciences, Deputy Vice Chancellor (Research & Innovation) Office, University of Malaya, Malaysia, 50603 Kuala Lumpur, Malaysia
  • 3 Dept. Magnetism and Superconductivity, National Institute of Materials Physics, 105 bis Atomistilor Str., Magurele, J.Ilfov, POBox MG-7, 077125 Romania
  • 4 Department of Chemistry, Faculty of Science, University of Malaya, Malaysia, 50603 Kuala Lumpur, Malaysia
ACS Omega, 2020 May 12;5(18):10315-10326.
PMID: 32426588 DOI: 10.1021/acsomega.9b04388

Abstract

Hybrid bionanocomposite coating systems (HBCSs) are green polymer materials consisting of an interface between a coating matrix and nanoparticles. The coating matrix was prepared by using a nonisocyanate poly(hydroxyl urethane) (NIPHU) prepolymer crosslinked via 1,3-diaminopropane and epoxidized Jatropha curcas oil. TEMPO-oxidized cellulose nanoparticles (TARC) were prepared from microcrystalline cellulose, and (3-aminopropyl)trimethoxysilane (APTMS)-coated ZnO nanoparticles (APTMS-ZnO) and their suspensions were synthesized separately. The suspensions at different weight ratios were incorporated into the coating matrix to prepare a series of HBCSs. FT-IR, 1H-NMR, 13C-NMR, XRD, SEM, and TEM were used to confirm the chemical structures, morphology, and elements of the coating matrix, nanomaterials, and HBCSs. The thermomechanical properties of the HBCSs were investigated by TGA-DTG and pencil hardness analyses. The UV and IR absorption spectra of the HBCSs were obtained using UV-vis spectroscopy and FTIR spectroscopy, respectively. The HBCSs exhibited good thermal stability at about 200 °C. The degradation temperature at 5% mass loss of all samples was over around 280 °C. The HBCSs exhibited excellent UV block and IR active properties with a stoichiometric ratio of the NIPHU prepolymer and EJCO of 1:1 (wt/wt) containing 5 wt % TARC and 15 wt % APTMS-ZnO nanoparticles. It was observed that the sample with 5 wt % TARC and 15 wt % APTMS-ZnO (HBCS-2) exhibited a uniform crosslinking and reinforcement network with a Tonset of 282 °C. This sample has successfully achieved good coating hardness and excellent UV and IR absorption.

* Title and MeSH Headings from MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.