Eggshells: A novel bio-filler for intumescent flame-retardant coatings

Yew, M.C. and Sulong, N.H.R. and Yew, M.K. and Amalina, M.A. and Johan, M.R. (2015) Eggshells: A novel bio-filler for intumescent flame-retardant coatings. Progress in Organic Coatings, 81. pp. 116-124. ISSN 0300-9440, DOI

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The aim of this study was to develop intumescent flame-retardant coatings that incorporate chicken eggshell (CES) waste as a novel eco-friendly bio-filler. Three flame-retardant additives, namely, ammonium polyphosphate phase II, pentaerythritol and melamine were mixed with flame-retardant fillers and acrylic binder to synthesize the intumescent coatings. The fire performance of the coatings was evaluated in accordance with 'BS 476: Part 6-Fire Propagation' and 'BS 476: Part 7-Surface Spread of Flame' test standards. It was found that 4 out of 5 of the coated specimens (B, C, D and E) neither showed surface spread of flame nor any afterglow combustion upon fire exposure. The addition of 5.0 wt and 2.5 wt eggshell bio-filler into formulations B and E, respectively, improved fire protection due to char formation, with better morphology, height and structure of the protecting shield. The filler compositions of samples D (3.4 wt TiO2/3.3 wt Al(OH)3/3.3 wt Mg(OH)(2)) and E (2.5 wt TiO2/2.5 wt Al(OH)(3)/2.5 wt Mg(OH)(2)/2.5 wt CES) applied at a thickness of 1.5 +/- 0.2 mm achieved the lowest fire propagation index with a value of 4.5 and 5.0, respectively (BS 476 Part 6, Class 0 materials) which indicates excellent fire-stopping properties. The results showed that the coatings were effective in fire protection, with good qualities of water resistance, thermal stability, and adhesion strength. Significantly, coating E (with CES) has proved to be efficient in the protection of plywood against fire. (C) 2015 Elsevier B.V. All rights reserved.

Item Type: Article
Funders: University of Malaya UMRG-RP004C-13AET IPPP-PG030-2013A
Additional Information: Cd2st Times Cited:0 Cited References Count:50
Uncontrolled Keywords: Acrylic resin, chicken eggshell, bio-filler, eco-friendly, intumescent coating, flame-retardant, fire protective-coatings, vinyl acetate copolymer, expandable graphite, polypropylene composites, mechanical-properties, magnesium-hydroxide, performance, resistance, steel, polyethylene,
Subjects: T Technology > T Technology (General)
T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Faculty of Engineering
Depositing User: Mr Jenal S
Date Deposited: 17 Sep 2015 03:22
Last Modified: 17 Sep 2015 03:22

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