An experimental study to evaluate the effect of TiO2 nanoparticles on the strength and stability of unidirectional glass fiber reinforced epoxy composites

Sridhar Thipperudrappa, Achutha Ullal Kini, Anupama Hiremath

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Abstract

The present paper discusses the improvement brought about in the strength and thermal stability of the unidirectional glass fiber reinforced epoxy composites through the incorporation of nano TiO2. The hybrid nanocomposites are fabricated through wet lay-up technique and are cured under pressure and static loading at room temperature. The TiO2 is added in 1, 2, 3, 4 and 5 wt% in order to arrive at the optimum wt% of nano TiO2 for improvement in the desired properties such as bend strength, tensile strength and composite toughness. The uniform dispersion of nano TiO2 into the epoxy matrix is achieved by sonication method. It is observed that the mechanical properties improved for TiO2 addition up to 2 wt%. At 3, 4 and 5 wt% addition of nano TiO2 the mechanical properties deteriorated due to severe agglomeration of the nano TiO2 at higher loading. The agglomeration at higher loading is observed through the SEM and AFM images. The thermal stability of the hybrid nanocomposite is studied through thermogravimetric analysis and the results depicted an improved thermal stability at higher wt% addition of nano TiO2. This is because of the retardant effect exhibited by TiO2 at higher wt loading to heat and oxygen. Hence, slowing down the thermal degradation of the composite.

Original languageEnglish
Article number115347
JournalMaterials Research Express
Volume6
Issue number11
DOIs
Publication statusPublished - 01-11-2019

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Glass fibers
Thermodynamic stability
Nanoparticles
Nanocomposites
Composite materials
Agglomeration
Mechanical properties
Sonication
Toughness
Thermogravimetric analysis
Pyrolysis
Tensile strength
Scanning electron microscopy
Oxygen
fiberglass
titanium dioxide
Temperature
Hot Temperature

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Surfaces, Coatings and Films
  • Polymers and Plastics
  • Metals and Alloys

Cite this

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title = "An experimental study to evaluate the effect of TiO2 nanoparticles on the strength and stability of unidirectional glass fiber reinforced epoxy composites",
abstract = "The present paper discusses the improvement brought about in the strength and thermal stability of the unidirectional glass fiber reinforced epoxy composites through the incorporation of nano TiO2. The hybrid nanocomposites are fabricated through wet lay-up technique and are cured under pressure and static loading at room temperature. The TiO2 is added in 1, 2, 3, 4 and 5 wt{\%} in order to arrive at the optimum wt{\%} of nano TiO2 for improvement in the desired properties such as bend strength, tensile strength and composite toughness. The uniform dispersion of nano TiO2 into the epoxy matrix is achieved by sonication method. It is observed that the mechanical properties improved for TiO2 addition up to 2 wt{\%}. At 3, 4 and 5 wt{\%} addition of nano TiO2 the mechanical properties deteriorated due to severe agglomeration of the nano TiO2 at higher loading. The agglomeration at higher loading is observed through the SEM and AFM images. The thermal stability of the hybrid nanocomposite is studied through thermogravimetric analysis and the results depicted an improved thermal stability at higher wt{\%} addition of nano TiO2. This is because of the retardant effect exhibited by TiO2 at higher wt loading to heat and oxygen. Hence, slowing down the thermal degradation of the composite.",
author = "Sridhar Thipperudrappa and Kini, {Achutha Ullal} and Anupama Hiremath",
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AU - Hiremath, Anupama

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AB - The present paper discusses the improvement brought about in the strength and thermal stability of the unidirectional glass fiber reinforced epoxy composites through the incorporation of nano TiO2. The hybrid nanocomposites are fabricated through wet lay-up technique and are cured under pressure and static loading at room temperature. The TiO2 is added in 1, 2, 3, 4 and 5 wt% in order to arrive at the optimum wt% of nano TiO2 for improvement in the desired properties such as bend strength, tensile strength and composite toughness. The uniform dispersion of nano TiO2 into the epoxy matrix is achieved by sonication method. It is observed that the mechanical properties improved for TiO2 addition up to 2 wt%. At 3, 4 and 5 wt% addition of nano TiO2 the mechanical properties deteriorated due to severe agglomeration of the nano TiO2 at higher loading. The agglomeration at higher loading is observed through the SEM and AFM images. The thermal stability of the hybrid nanocomposite is studied through thermogravimetric analysis and the results depicted an improved thermal stability at higher wt% addition of nano TiO2. This is because of the retardant effect exhibited by TiO2 at higher wt loading to heat and oxygen. Hence, slowing down the thermal degradation of the composite.

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