The Effects of Corn Kernel Bio-Filler on the Fire Retardancy of Intumescent Fire-Retardant Coating for Steel Structures
Received: 28 April 2025 | Revised: 9 June 2025 and 23 June 2025 | Accepted: 28 June 2025 | Online: 12 July 2025
Corresponding author: Faiz Ahmad
Abstract
The development of bio-based intumescent coatings is a focal point for achieving sustainability and eco-friendly coatings. This study introduces Corn Kernel (CK) bio-filler into a modified epoxy-based fire-retardant system, resulting in significant improvements in thermal resistance. This study develops intumescent coatings, utilizing CKs, and assesses the samples through thermal performance testing, char expansion analysis, and char morphology examination. The incorporation of 8% CK (CKC-8) enhanced the thermal performance of the coating, with a backside temperature recorded at 190.28 °C during the ASTM E119 test. Furthermore, the char expansion of the coating increased by 22.14%. The Thermogravimetric Analysis (TGA) examined the thermal pyrolysis behavior, revealing a 3% increase in residual mass. The Fourier Transform Infrared Spectroscopy (FTIR) and X-ray Diffraction (XRD) analyses confirmed the effective degradation of the CK, leading to the formation of CaCO3 in the char. The Field Emission Scanning Electron Microscope (FESEM) images demonstrated the presence of cross-linked char structures within the CK-filled char samples.
Keywords:
bio-filler, corn kernel, intumescent coating, fire resistanceDownloads
References
M. M. Kharnoob, A. Al Zand, D. H. Khalaf, and L. M. Sabti, "Performance of Steel Beams reinforced by CFRP Sheets with Fire-Retardant Coating," Engineering, Technology & Applied Science Research, vol. 14, no. 6, pp. 18902–18910, Dec. 2024. DOI: https://doi.org/10.48084/etasr.8807
Z. Zhou, Z. Zhang, J. Huang, and Y. Wang, "Water-based intumescent fire resistance coating containing organic-modified glass fiber for steel structure," Journal of Cleaner Production, vol. 442, Feb. 2024, Art. no. 140897. DOI: https://doi.org/10.1016/j.jclepro.2024.140897
Y. Li, Y. Feng, Z. Xu, L. Yan, X. Xie, and Z. Wang, "Synergistic effect of clam shell bio-filler on the fire-resistance and char formation of intumescent fire-retardant coatings," Journal of Materials Research and Technology, vol. 9, no. 6, pp. 14718–14728, Nov. 2020. DOI: https://doi.org/10.1016/j.jmrt.2020.10.055
T. Wibawa et al., "Enhancing the Mechanical and Fire-Resistant Properties of GFRP Composite using Boric Acid and Sodium Silicate Fillers," Engineering, Technology & Applied Science Research, vol. 14, no. 6, pp. 18911–18922, Dec. 2024. DOI: https://doi.org/10.48084/etasr.9271
A. Rakhman, K. Diharjo, W. W. Raharjo, V. Suryanti, and S. Kaleg, "Improvement of Fire Resistance and Mechanical Properties of Glass Fiber Reinforced Plastic (GFRP) Composite Prepared from Combination of Active Nano Filler of Modified Pumice and Commercial Active Fillers," Polymers, vol. 15, no. 1, Dec. 2022, Art. no. 51. DOI: https://doi.org/10.3390/polym15010051
Y. X. Lee, F. Ahmad, S. Karuppanan, C. Sumby, C. A. Shahed, and S. H. Ramli, "Thermo‐mechanical performance of wolframite mineral reinforced siloxane‐modified epoxy‐based intumescent coating for structural steel," Polymers for Advanced Technologies, vol. 35, no. 1, Jan. 2024, Art. no. e6279. DOI: https://doi.org/10.1002/pat.6279
W. Zhan et al., "Biomaterials in intumescent fire-retardant coatings: A review," Progress in Organic Coatings, vol. 192, Jul. 2024, Art. no. 108483. DOI: https://doi.org/10.1016/j.porgcoat.2024.108483
K. Diharjo, F. Gapsari, A. Andoko, M. N. Wijaya, S. Mavinkere Rangappa, and S. Siengchin, "Flammability and thermal resistance of Ceiba petandra fiber-reinforced composite with snail powder filler," Polymer Composites, vol. 45, no. 6, pp. 4947–4960, Apr. 2024. DOI: https://doi.org/10.1002/pc.28100
K. Diharjo, Sutrisno, Triyono, R. Afandi, and D. A. Himawanto, "Enhancing of fire resistance on CFRP using Sokka-clay particle for lightweight car body panel," in 2014 International Conference on Electrical Engineering and Computer Science (ICEECS), Kuta, Bali, Indonesia, Nov. 2014, pp. 188–192. DOI: https://doi.org/10.1109/ICEECS.2014.7045243
J. H. Beh, M. K. Yew, M. C. Yew, and L. H. Saw, "Characterization and fire protection properties of rubberwood biomass ash formulated intumescent coatings for steel," Journal of Materials Research and Technology, vol. 14, pp. 2096–2106, Sep. 2021. DOI: https://doi.org/10.1016/j.jmrt.2021.07.103
M. C. Yew, M. K. Yew, L. H. Saw, T. C. Ng, R. Durairaj, and J. H. Beh, "Influences of nano bio-filler on the fire-resistive and mechanical properties of water-based intumescent coatings," Progress in Organic Coatings, vol. 124, pp. 33–40, Nov. 2018. DOI: https://doi.org/10.1016/j.porgcoat.2018.07.022
K. Dhasindrakrishna, S. Ramakrishnan, K. Pasupathy, and J. Sanjayan, "Synthesis and performance of intumescent alkali-activated rice husk ash for fire-resistant applications," Journal of Building Engineering, vol. 51, Jul. 2022, Art. no. 104281. DOI: https://doi.org/10.1016/j.jobe.2022.104281
S. Zhang, F. Liu, H. Peng, X. Peng, S. Jiang, and J. Wang, "Preparation of Novel c-6 Position Carboxyl Corn Starch by a Green Method and Its Application in Flame Retardance of Epoxy Resin," Industrial & Engineering Chemistry Research, vol. 54, no. 48, pp. 11944–11952, Dec. 2015. DOI: https://doi.org/10.1021/acs.iecr.5b03266
J. Y. Choi, Y. U. Kim, J. Nam, S. Kim, and S. Kim, "Enhancing the thermal stability and fire retardancy of bio-based building materials through pre-biochar system," Construction and Building Materials, vol. 409, Dec. 2023, Art. no. 134099. DOI: https://doi.org/10.1016/j.conbuildmat.2023.134099
L. Lv et al., "Extraction of discarded corn husk fibers and its flame retarded composites," Tekstil ve Konfeksiyon, vol. 27, no. 4, pp. 408–413, Jul. 2017.
S. García-Lara, C. Chuck-Hernandez, and S. O. Serna-Saldivar, "Development and Structure of the Corn Kernel," in Corn (Third Edition), O. S. Sergio, Ed., Elsevier, 2019, pp. 147–163. DOI: https://doi.org/10.1016/B978-0-12-811971-6.00006-1
J. Zhang et al., "Preparation and performance analysis of palygorskite reinforced silicone-acrylic emulsion-based intumescent coating," Progress in Organic Coatings, vol. 166, May 2022, Art. no. 106801. DOI: https://doi.org/10.1016/j.porgcoat.2022.106801
Y. X. Lee, F. Ahmad, S. Kabir, P. J. Masset, E. Onate, and G. H. Yeoh, "Synergistic effects of tubular halloysite clay and zirconium phosphate on thermal behavior of intumescent coating for structural steel," Journal of Materials Research and Technology, vol. 18, pp. 4456–4469, May 2022. DOI: https://doi.org/10.1016/j.jmrt.2022.04.097
S. Kaleg et al., "Evaluations of Aluminum Tri-Hydroxide and Pristine Montmorillonite in Glass Fiber Reinforced Polymer for Vehicle Components," International Journal of Automotive and Mechanical Engineering, vol. 19, no. 1, pp. 9379–9390, Mar. 2022. DOI: https://doi.org/10.15282/ijame.19.1.2022.02.0721
J. B. Zoleta et al., "Improved pyrolysis behavior of ammonium polyphosphate-melamine-expandable (APP-MEL-EG) intumescent fire retardant coating system using ceria and dolomite as additives for I-beam steel application," Heliyon, vol. 6, no. 1, Jan. 2020, Art. no. e03119. DOI: https://doi.org/10.1016/j.heliyon.2019.e03119
T. Franke and T. Volkmer, "Mineralization treatment of European oak heartwood with calcium oxalate for improved fire retardancy," Holzforschung, vol. 76, no. 1, pp. 77–88, Jan. 2022. DOI: https://doi.org/10.1515/hf-2021-0055
S. Ullah et al., "Effects of expandable graphite on char morphology and pyrolysis of epoxy based intumescent FIRE‐RETARDANT coating," Journal of Applied Polymer Science, vol. 138, no. 41, Nov. 2021, Art. no. 51206. DOI: https://doi.org/10.1002/app.51206
Q. F. Gillani et al., "Thermal degradation and pyrolysis analysis of zinc borate reinforced intumescent fire retardant coatings," Progress in Organic Coatings, vol. 123, pp. 82–98, Oct. 2018. DOI: https://doi.org/10.1016/j.porgcoat.2018.05.007
Z. Yang et al., "Synergistic decoration of organic titanium and polydopamine on boron nitride to enhance fire resistance of intumescent waterborne epoxy coating," Colloids and Surfaces A: Physicochemical and Engineering Aspects, vol. 621, Jul. 2021, Art. no. 126561. DOI: https://doi.org/10.1016/j.colsurfa.2021.126561
F. Wang, H. Liu, and L. Yan, "Comparative Study of Fire Resistance and Char Formation of Intumescent Fire-Retardant Coatings Reinforced with Three Types of Shell Bio-Fillers," Polymers, vol. 13, no. 24, Dec. 2021, Art. no. 4333. DOI: https://doi.org/10.3390/polym13244333
D. Wu, M. Yang, T. Wu, Y. Shen, and T. Wang, "Green one-step modification of spent coffee grounds as synergistic bio-based flame retardant for waterborne epoxy resin," Progress in Organic Coatings, vol. 191, Jun. 2024, Art. no. 108409. DOI: https://doi.org/10.1016/j.porgcoat.2024.108409
Z. Xu, D. Liu, L. Yan, and X. Xie, "Synergistic effect of sepiolite and polyphosphate ester on the fire protection and smoke suppression properties of an amino transparent fire-retardant coating," Progress in Organic Coatings, vol. 141, Apr. 2020, Art. no. 105572. DOI: https://doi.org/10.1016/j.porgcoat.2020.105572
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Copyright (c) 2025 Syed Niaz Hossain Chowdhury, Faiz Ahmad, K. E. Kee, Siti Haslina Kee
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