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    Preparation and characterizations of oil palm fronds cellulose nanocrystal (OPF-CNC) as reinforcing filler in epoxy-Zn rich coating for mild steel corrosion protection

    Year: 2020

    Journal: Int. J. Biol. Macromol., Volume 153, JUN 15, page 385–398

    Authors: Azani, Nur Fatin Silmi Mohd; Haafiz, M. K. Mohamad; Zahari, Azeana; Poinsignon, Sophie; Brosse, Nicolas; Hussin, M. Hazwan

    Organizations: Universiti Sains Malaysia (USM)Universiti Sains Malaysia [1001/PKIMIA/8011077]; USM

    Keywords: Oil palm frond; Cellulose nanocrystal; Coating

    Oil palm frond (OPF) is one of largest contributions to the biomass waste from oil palm plantation. In this work, OPF has been successfully utilized to prepare cellulose nanocrystal (OPF-CNC) by acid hydrolysis. OPF was initially treated with autohydrolysis treatment. The obtained OPF-CNC was characterized via complementary analyses. The produced OPF-CNC showed a high crystallinity index value (60%) and high BET surface area (26.10 m(2) g(-1)) as compared to alpha-cellulose (crystallinity index: 54% and BET surface area:7.14 m(2) g(-1)). The surface analyses via scanning electron microscope (SEM) and transmission electron microscopy (TEM) demonstrated that the OPF-CNC has a smooth surface with a needle-like shape, where the average length and diameter are 95.09 nm and 6.81 nm, respectively. The corrosion analyses via electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization (PD) illustrate that the coated mild steel with the inclusion of 0.5 wt% OPF-CNC has managed to sharply reduce the corrosion (99%). The coated mild steel with the inclusion of 0.5 wt% OPF-CNC showed the highest hydrophobicity (1005 +/- 0.7 degrees) and has lowest amount of O via water contact angle and energy dispersive X-ray spectroscopy (EDX) analyses respectively, indicating lowest corrosion rate. (C) 2020 Elsevier B.V. All rights reserved.
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