The effects of modified zinc oxide nanoparticles on the mechanical/thermal properties of epoxy resin

Characterized by its strength, durability, and thermal properties, epoxy resin has been widely used as an adhesive, paint, and coating in many applications in the aerospace, civil and automotive industries. Despite this, the thermoset polymer resin has been known for its brittleness and low fracture...

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Veröffentlicht in:Journal of applied polymer science 2020-11, Vol.137 (43), p.n/a
Hauptverfasser: Baghdadi, Yasmine N., Youssef, Lucia, Bouhadir, Kamal, Harb, Mohammad, Mustapha, Samir, Patra, Digambara, Tehrani‐Bagha, Ali R.
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container_issue 43
container_start_page
container_title Journal of applied polymer science
container_volume 137
creator Baghdadi, Yasmine N.
Youssef, Lucia
Bouhadir, Kamal
Harb, Mohammad
Mustapha, Samir
Patra, Digambara
Tehrani‐Bagha, Ali R.
description Characterized by its strength, durability, and thermal properties, epoxy resin has been widely used as an adhesive, paint, and coating in many applications in the aerospace, civil and automotive industries. Despite this, the thermoset polymer resin has been known for its brittleness and low fracture resistance. This study focuses on the reinforcement of an epoxy resin system (diglycidyl ether of bisphenol A) with zinc oxide (ZnO) nanoparticles in their pristine form and a further modified form. The modification took place in two ways: coating with polydopamine (PDA) and covalently functionalizing them with (3‐aminopropyl)triethoxysilane (APTES) and (3‐glycidoxypropyl)trimethoxysilane (GPTMS). Therefore, four different types of nanoparticles were used: pristine ZnO, ZnO/PDA, ZnO/GPTMS, and ZnO/APTES aiming to improve the interfacial bonding between the polymeric matrix and the reinforcement. Thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy, and scanning electron microscopy characterization and imaging techniques were used to prove that the ZnO nanoparticles were successfully modified prior to manufacturing the epoxy composites. While tensile testing showed that using pristine ZnO increases the composite's strength by 32.14%, the fracture toughness of the resin was improved by 9.40% when reinforced with ZnO functionalized with APTES. TGA showed that the addition of functionalized nanoparticles increases the material's degradation temperature by at most 7.31 ± 4.9°C using ZnO/APTES. Differential scanning calorimetry and dynamic mechanical analysis testing proved that the addition of any type of nanoparticles increases the resin's glass transition temperature by as much as 7.83°C (ZnO/APTES).
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Despite this, the thermoset polymer resin has been known for its brittleness and low fracture resistance. This study focuses on the reinforcement of an epoxy resin system (diglycidyl ether of bisphenol A) with zinc oxide (ZnO) nanoparticles in their pristine form and a further modified form. The modification took place in two ways: coating with polydopamine (PDA) and covalently functionalizing them with (3‐aminopropyl)triethoxysilane (APTES) and (3‐glycidoxypropyl)trimethoxysilane (GPTMS). Therefore, four different types of nanoparticles were used: pristine ZnO, ZnO/PDA, ZnO/GPTMS, and ZnO/APTES aiming to improve the interfacial bonding between the polymeric matrix and the reinforcement. Thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy, and scanning electron microscopy characterization and imaging techniques were used to prove that the ZnO nanoparticles were successfully modified prior to manufacturing the epoxy composites. While tensile testing showed that using pristine ZnO increases the composite's strength by 32.14%, the fracture toughness of the resin was improved by 9.40% when reinforced with ZnO functionalized with APTES. TGA showed that the addition of functionalized nanoparticles increases the material's degradation temperature by at most 7.31 ± 4.9°C using ZnO/APTES. 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subjects Aerospace industry
Aminopropyltriethoxysilane
Bisphenol A
composites
Differential scanning calorimetry
Dynamic mechanical analysis
Epoxy resins
Fourier transforms
Fracture toughness
Glass fiber reinforced plastics
Glass transition temperature
Imaging techniques
Infrared analysis
Interfacial bonding
Materials science
mechanical properties
nanocrystals
Nanoparticles
nanostructured polymers
nanowires
Polymers
S glass
thermal properties
Thermodynamic properties
Thermogravimetric analysis
Thermosetting resins
Zinc oxide
Zinc oxides
title The effects of modified zinc oxide nanoparticles on the mechanical/thermal properties of epoxy resin
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