Nanostructured Fly Ash as Reinforcement in a Plastomer-Based Composite: A New Strategy in Value Addition to Thermal Power Station Fly Ash

• Published in: SILICON 2016-01, Vol.8 (1), p.159-173
• Main Authors: Patil, Akshata G., Mahendran, Arunjunairaj, Anandhan, S.
• Format: Article
• Language: English
• Subjects: Ball milling; Chemistry; Chemistry and Materials Science; Coal-fired power plants; Composite materials; Contact angle; Copolymers; Crystallites; Environmental Chemistry; Ethylene; Fillers; Fly ash; Inorganic Chemistry; Lasers; Lattice strain; Materials Science; Mechanical properties; Octenes; Optical Devices; Optics; Original Paper; Photonics; Polymer Sciences; Polymers; Thermal power plants; Thermoelectricity
• ISSN: 1876-990X; 1876-9918
• DOI: 10.1007/s12633-014-9194-2

Class-F fly ash (FA) from a coal-fired thermal power station was subjected to high energy ball milling-induced mechanochemical activation aided by a surfactant. Subsequently, ethylene-octene copolymer/mechanochemically activated FA (EOC/MCA-FA) composites were prepared by solution casting. The surface modification of FA was confirmed from contact angle measurements and FTIR spectroscopy, which accounts for a good interaction between MCA-FA and the polymer matrix. X-ray diffraction reveals that the crystallite size of quartz phase present in FA got reduced, while the relative lattice strain on it increased during milling. Morphological studies revealed that interfacial adhesion between the polymer and MCA-FA is good and this accounts for the improvement in mechanical properties of the composites even at the minimum filler loading. Flame retardance of the matrix polymer is improved by the addition of either fresh FA or MCA-FA. The results imply that FA is a valuable reinforcing filler for ethylene-octene copolymer and its mechanochemical activation is an effective strategy for its future use.