Effect of sulfuric acid solution on thermal conductivity and impact strength of epoxy resin reinforced by silicon dioxide powder

Baraa Khalil Ibrahim

doi:10.30723/ijp.v17i41.462

Abstract

In this search, Ep/SiO2 at (3, 6, 9, 12 %) composites is prepared by hand Lay-up method, to measure the change in the thermal conductivity and Impact Strength of epoxy resin before and after immersion in H2SO4 Solution with a 0.3N for 10 days. The results before immersion decreases with the increase of the weight ratios of the reinforcement material (SiO2), It changed from (82.6×10-2 to 38.7×10-2 W/m.°C) with change weight ratios from (3 to 12) % respectively, but after immersion time in the chemical solution where it was (65.6×10-2 W/m.°C) at the weight ratios (6 %) and became (46.6 × 10-2 W/m.°C) after immersion in sulfuric acid. The results of the Impact strength decreased by increasing the percentage weight ratio, it changed from (1.48 to 0.87 kJ/m2) with change weight ratios from (3 to 12) % respectively, but found an increase in the value of Impact Strength after immersion in the chemical solution Where it was (1.28 kJ/m2) at the weight ratio of 6 % and became (1.82 kJ/m2) at the same weight ratio after immersion in sulfuric acid at normality of 0.3 for 10 days.

Highlights

There was an insistent need to find alternatives to the materials so that these alternatives are of a high quality in terms of weight, cost and properties in general to be adopted in the various manufacturing applications that called composite materials, which is known as the material resulting from the mixing of two or more material by a physical coherence without chemically interaction to obtain new materials that differ in their properties from the properties of their constituents [1]
In 2015, Maryam Zuhair studied the mechanical and thermal properties of epoxy resins reinforced by magnesium oxide and nano-silica oxide In different weight ratios, where the results showed that the thermal conductivity of all cases is higher than the value of the thermal conductivity of the base material as well as the value of the wear coefficient was higher for all cases than the values of wear coefficient of epoxy resin without reinforcement and the value of the elasticity coefficient is higher at the hybrid composite at the rate (0.2 %) [3]
We note that the thermal conductivity begins to decrease with increasing the weight ratios of SiO2 powder and the reason for this is because the base material and the reinforcing material are considered heat insulation materials [12]

Summary

Introduction

There was an insistent need to find alternatives to the materials so that these alternatives are of a high quality in terms of weight, cost and properties in general to be adopted in the various manufacturing applications that called composite materials, which is known as the material resulting from the mixing of two or more material by a physical coherence without chemically interaction to obtain new materials that differ in their properties from the properties of their constituents [1]. In 2015, Maryam Zuhair studied the mechanical and thermal properties of epoxy resins reinforced by magnesium oxide and nano-silica oxide In different weight ratios, where the results showed that the thermal conductivity of all cases (the base material with the nanomagnesium oxide once and twice the silica oxide once and the mixture again) is higher than the value of the thermal conductivity of the base material as well as the value of the wear coefficient was higher for all cases than the values of wear coefficient of epoxy resin without reinforcement and the value of the elasticity coefficient is higher at the hybrid composite at the rate (0.2 %) [3]. Magnesium oxide and silica particles were used in different granular sizes (125, 75, 37 (μm)) at 5 % volume fracture. Both types was prepared at the ratios 2.5 %. The aims of this research are to: - Prepare composite material of epoxy resins supported by micro particle of SiO2 at different weight ratios (3, 6, 9 and 12) wt%. - Studying the thermal conductivity and Impact strength property of composite materials which are tested befor and after immersion in sulfuric acid

Objectives

Results

Conclusion