Original papers 182 Ceramics – Silikáty 54 (2) 182-191 (2010) DEVELOPMENT OF THE INSULATION MATERIALS FROM COAL FLY ASH, PERLITE, CLAY AND LINSEED OIL FIGEN BALO, AYNUR UCAR*, HALIT LÜTFI YÜCEL* The Ministry of Public Works and Settlement, Elazığ, Turkey *Department of Mechanical Engineering, Firat University, 23279 Elazığ, Turkey E-mail: fi[email protected] Submitted January 25, 2010; accepted June 11, 2010 Keywords: Epoxidized linseed oil, Thermal conductivity, Mechanical properties, Fly ash, Perlite The effect of coal fly ash (FA), clay (C), perlite (P) and epoxidized linseed oil (ELO) on the thermal and mechanical properties of insulation materials was investigated. The properties examined include density, thermal conductivity coefficient, compressive strength and tensile strength. A number of insulation material compositions were prepared with the FA, C, perlite and ELO. The results showed that compressive-tensile strength of the insulation material decreased when the high fly ash ratio and high epoxidized linseed oil ratio used in the preparation of the insulation material composition. The compressive and tensile strengths varied from 10.01 to 1.107 MPa and 8.38 to 1.013 MPa, respectively. The minimum thermal conductivity of 0.313 W/mK observed for the sample (L36) made with a 60% FA/30% C/10% P ratio and 50% ELO processed at 200°C. It is increased with the decrease of ELO and FA. Results indicate an interesting potential for the coal fly ash recycling and epoxidized linseed oil renewable to produce useful materials. INTRODUCTION The importance of renewable resource based pro- ducts for industrial applications becomes extremely clear in recent years with increasing emphasis on the environmental issues, waste disposal, and depleting non- renewable resources. Renewable resource-based poly- mers can yield a platform to substitute petroleum-based polymers. Through innovative ideas in designing the new biobased polymers which can compete or even surpass with the existing petroleum-based materials on a cost-performance basis with the added advantage of eco-friendliness. There is a growing urgency to develop and commercialize new biobased products and other innovative technologies that can reduce widespread dependence on fossil fuel and at the same time would enhance national security, the environment, and the economy [1]. Seed oils have traditionally been used as drying oils and raw materials for uralkyds and alkyd resin [2]. Naturally occurring seed oils are triglycerides consisting of a mixture of saturated, oleic, linoleic, and linolenic fatty acid. Figure 1 shows an example of a triglyceride containing an oleic, linoleic, and linolenic fatty acid. Seed oils are classified according to the linoleic and linolenic acid content. A convenient method of classification is drying index [2, 3]. Linseed oil has one of the highest drying indexes of the most common drying oils conventionally used in paint and varnish industry. The carbon–carbon double bond on oleic, linoleic and linolenic fatty acid can be epoxidized by reaction with peroxyacids, dioxirane, or hydrogen peroxide [4]. Figure 1. (a) Oleic fatty acid; (b) linoleic fatty acid; and (c) linolenic fatty acid.
DEVELOPMENT OF THE INSULATION MATERIALS FROM COAL FLY ASH, PERLITE, CLAY AND LINSEED OIL
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