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Specific crosslinking effects of poly(epichlorohydrin)-triol on urethane polymer matrix of castor seed oil-based coatings

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Abstract

The contributions of castor seed oil (CSO) as a useful, nontoxic, and sustainable base material for coating systems cannot be overemphasized. This paper took advantage of the predominant fatty acid composition in CSO (i.e., ricinoleic acid). It blended a synthesized crosslinker, poly(epichlorohydrin-triol) (PECH-triol), in percentages within its polymeric matrix. Physicochemical and spectroscopic (FTIR, 1H-NMR, and 13C-NMR) examinations were carried out on the polyols. Thermal stability, hydrophobicity, anticorrosion, mechanical, and antibacterial properties of the prepared polyurethane (PU) coatings were examined. The 20% PECH-triol–CSO-PU film having its TON and TEND at 230.5 and 511.0°C, respectively, showed improved thermal stability when compared with the pristine film (CSO-PU). The derivative of TGA reveals a three-stage degradation step. Hydrophobicity was seen to increase from 73.3° to 92.2°, a reflection of the crosslinking effect of PECH-triol within the urethane matrix. The improved adhesion of 20% PECH-triol–CSO-PU coating on mild steel gave a better chemical resistance.

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Acknowledgment

Dr. Tolutope Oluwasegun Siyanbola is grateful to The World Academy of Science (TWAS) (Italy) and CSIR (India) for the 2016 Postdoctoral Fellowship Award (FR number: 3240293580). The Indian Institute of Chemical Technology (IICT) is well appreciated for providing the laboratory for my bench work. Appreciation goes to Covenant University, Ota, Nigeria, for granting my study leave in IICT. Mr. O.S. Taiwo, of Biological Science, Covenant University, Ota, Nigeria is appreciated for carrying out the antimicrobial test on the films. I acknowledge the support of my darling wife, Mrs. Tunmike Oluwasola Siyanbola, and my children (Toni and Toluwase). Permit me to also acknowledge that R. Enishetty and myself have equal contributions toward the completion of this paper.

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Authors and Affiliations

  1. Polymers and Functional Materials Division, Indian Institute of Chemical Technology, Hyderabad, 500 007, India

    T. O. Siyanbola, R. Enishetty, R. Kumar, R. Narayan & K. V. S. N. Raju

  2. Department of Chemistry, Covenant University, P.M.B. 1023, Ota, Ogun State, Nigeria

    T. O. Siyanbola

  3. Chemistry Department, Kwara State University, P.M.B. 1530, Malete, Kwara State, Nigeria

    O. O. James

  4. Department of Biological Sciences, Covenant University, P.M.B. 1023, Ota, Ogun State, Nigeria

    G. I. Olasehinde

  5. Centre for Lipid Science and Technology, Indian Institute of Chemical Technology, Hyderabad, 500 007, India

    S. Kaki

  6. Academy of Scientific and Innovative Research (AcSIR), Rafi Marg, New Delhi, 110001, India

    R. Kumar, S. Kaki, R. Narayan & K. V. S. N. Raju

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  1. T. O. Siyanbola
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  2. R. Enishetty
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  3. R. Kumar
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  4. O. O. James
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  5. G. I. Olasehinde
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  6. S. Kaki
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  8. K. V. S. N. Raju
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Correspondence to T. O. Siyanbola.

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R. Narayan and K. V. S. N. Raju are host supervisors at Indian Institute of Chemical Technology, Hyderabad, Telangana, India.

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Siyanbola, T.O., Enishetty, R., Kumar, R. et al. Specific crosslinking effects of poly(epichlorohydrin)-triol on urethane polymer matrix of castor seed oil-based coatings. J Coat Technol Res 18, 129–141 (2021). https://doi.org/10.1007/s11998-020-00387-4

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  • DOI: https://doi.org/10.1007/s11998-020-00387-4

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