{"id":{"repo_id":"ohiolink","oai_identifier":"oai:etd.ohiolink.edu:ucin1352992819"},"canonical_url":"https://search.dev.ndltd.org/etd/ohiolink/oai:etd.ohiolink.edu:ucin1352992819","repository":{"repo_id":"ohiolink","name":"OhioLINK","base_url":"https://etd.ohiolink.edu/acprod/odb_etd/ws/oai/oai"},"display":{"title":"Processing and Properties of Hybrid Silane-Epoxy Nanocomposite Coatings","abstract":"This research is focused on the development, analysis and evaluation of the properties of hybrid organoclay composites coatings and membranes. The control material used in this study is water based epoxy ester due to its low volatile organic content and better corrosion resistance than the epoxy resins. The use of epoxy ester is limited by its poor mechanical properties. The durability and mechanical properties of epoxy ester coatings and films were improved by blending it with aromatic polyurea. This concept of hybrid composition of epoxy ester and polyurea is novel and has never been applied before. The glass transition temperature of the epoxy ester films was increased from nearly 30°C to 140°C in the hybrid composition. The damping ability of the epoxy ester was also increased from a narrow range of temperature (30°C to 80°C) to a broader range of temperature (30°C to 230°C) along with the increase in storage modulus (in glassy state as well as in rubbery state). The properties of polyurea and epoxy ester were enhanced by coupling both the polymers with polymethylhydrosiloxane. The corrosion performance of polyurea and epoxy ester blend was also improved by using a combination of silanes (amino silane and epoxy silane). The chemical reactions between various entities were investigated by fourier transform infrared spectroscopy and the changes in physical and mechanical properties were studied by a dynamic mechanical analyzer. The corrosion performance of the hybrid coatings was analyzed by direct current polarization method (DCP), electrochemical impedance spectroscopy (EIS) and visual inspection of scribed coated substrates in 3.5wt% NaCl solution. Montmorillonite 15A Clay was used as filler for the neat epoxy ester as well as for hybrid compositions and its concentration was optimized for various systems. The corrosion resistance as well as the barrier properties (reduced diffusivity) of the coatings was enhanced by the addition of organoclay. The morphology of the coatings was observed under scanning electron microscopy. The resultant structure of clay in the polymer clay nanocomposites was analyzed by X-ray diffraction technique and transmission electron microscope. The hybrid coatings are not only better than the epoxy coatings but also outperform the chromated epoxy coatings in the corrosion resistance performance. The scribed coating on aluminum alloy Al 2024-T4 does not show any signs of corrosion even after one year of exposure in 3.5 wt.% NaCl solution. The corrosion inhibition efficiency of clay/hybrid coating after 50 weeks of exposure is 2.7 (x 105 %) as compared to 9.9 (x 104 %) in silane rinse/polyester coating and 2.4 (x 103 %) in chromated epoxy after 4 weeks of exposure. One of the many unique findings of this research is that the corrosion resistance of the developed hybrid coating kept on increasing even after a year of exposure in corrosive environment and the coating seems to have infinite lifetime of corrosion protection. The mechanism of corrosion protection for various compositions of clay hybrid coatings has been explored and correlation between the viscoelastic properties and the corrosion resistance of the coatings has been made.","abstract_html":"This research is focused on the development, analysis and evaluation of the properties of hybrid organoclay composites coatings and membranes. The control material used in this study is water based epoxy ester due to its low volatile organic content and better corrosion resistance than the epoxy resins. The use of epoxy ester is limited by its poor mechanical properties. The durability and mechanical properties of epoxy ester coatings and films were improved by blending it with aromatic polyurea. This concept of hybrid composition of epoxy ester and polyurea is novel and has never been applied before. The glass transition temperature of the epoxy ester films was increased from nearly 30°C to 140°C in the hybrid composition. The damping ability of the epoxy ester was also increased from a narrow range of temperature (30°C to 80°C) to a broader range of temperature (30°C to 230°C) along with the increase in storage modulus (in glassy state as well as in rubbery state). The properties of polyurea and epoxy ester were enhanced by coupling both the polymers with polymethylhydrosiloxane. The corrosion performance of polyurea and epoxy ester blend was also improved by using a combination of silanes (amino silane and epoxy silane). The chemical reactions between various entities were investigated by fourier transform infrared spectroscopy and the changes in physical and mechanical properties were studied by a dynamic mechanical analyzer. The corrosion performance of the hybrid coatings was analyzed by direct current polarization method (DCP), electrochemical impedance spectroscopy (EIS) and visual inspection of scribed coated substrates in 3.5wt% NaCl solution. Montmorillonite 15A Clay was used as filler for the neat epoxy ester as well as for hybrid compositions and its concentration was optimized for various systems. The corrosion resistance as well as the barrier properties (reduced diffusivity) of the coatings was enhanced by the addition of organoclay. The morphology of the coatings was observed under scanning electron microscopy. The resultant structure of clay in the polymer clay nanocomposites was analyzed by X-ray diffraction technique and transmission electron microscope. The hybrid coatings are not only better than the epoxy coatings but also outperform the chromated epoxy coatings in the corrosion resistance performance. The scribed coating on aluminum alloy Al 2024-T4 does not show any signs of corrosion even after one year of exposure in 3.5 wt.% NaCl solution. The corrosion inhibition efficiency of clay/hybrid coating after 50 weeks of exposure is 2.7 (x 105 %) as compared to 9.9 (x 104 %) in silane rinse/polyester coating and 2.4 (x 103 %) in chromated epoxy after 4 weeks of exposure. One of the many unique findings of this research is that the corrosion resistance of the developed hybrid coating kept on increasing even after a year of exposure in corrosive environment and the coating seems to have infinite lifetime of corrosion protection. The mechanism of corrosion protection for various compositions of clay hybrid coatings has been explored and correlation between the viscoelastic properties and the corrosion resistance of the coatings has been made.","abstract_has_math":false,"creators":["Beemat, Jaspreet S."],"institution":"University of Cincinnati","degree_name":"PhD","degree_level":"doctoral","degree_discipline":"Engineering and Applied Science: Materials Science","degree_department":null,"school":null,"contributors":["Iroh, Jude"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2012,"date_issued":"2012","date_published":"2012","updated_at":"2026-07-24T03:36:23Z","subjects":["Materials Science","Polymer Clay Nanocomposite","Epoxy Ester","Polyurea","Corrosion","Aluminum Alloy","Transmission Electron Microscope"],"languages":["English"],"rights":["unrestricted","This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws."],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://rave.ohiolink.edu/etdc/view?acc_num=ucin1352992819","outbound_label":"Repository record","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Iroh, Jude"]},{"key":"dc:creator","label":"Author","values":["Beemat, Jaspreet S."]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2012"]},{"key":"dc:publisher","label":"Institution","values":["University of Cincinnati / OhioLINK"]},{"key":"dc:type","label":"Dc Type","values":["Electronic Thesis or Dissertation"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Engineering and Applied Science: Materials Science"]},{"key":"thesis:degree_level","label":"Degree Level","values":["doctoral"]},{"key":"thesis:degree_name","label":"Degree Name","values":["PhD"]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Cincinnati"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Materials Science","Polymer Clay Nanocomposite","Epoxy Ester","Polyurea","Corrosion","Aluminum Alloy","Transmission Electron Microscope"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["English"]},{"key":"dc:rights","label":"Dc Rights","values":["unrestricted","This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws."]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://rave.ohiolink.edu/etdc/view?acc_num=ucin1352992819"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["This research is focused on the development, analysis and evaluation of the properties of hybrid organoclay composites coatings and membranes. The control material used in this study is water based epoxy ester due to its low volatile organic content and better corrosion resistance than the epoxy resins. The use of epoxy ester is limited by its poor mechanical properties. The durability and mechanical properties of epoxy ester coatings and films were improved by blending it with aromatic polyurea. This concept of hybrid composition of epoxy ester and polyurea is novel and has never been applied before. The glass transition temperature of the epoxy ester films was increased from nearly 30°C to 140°C in the hybrid composition. The damping ability of the epoxy ester was also increased from a narrow range of temperature (30°C to 80°C) to a broader range of temperature (30°C to 230°C) along with the increase in storage modulus (in glassy state as well as in rubbery state). The properties of polyurea and epoxy ester were enhanced by coupling both the polymers with polymethylhydrosiloxane. The corrosion performance of polyurea and epoxy ester blend was also improved by using a combination of silanes (amino silane and epoxy silane). The chemical reactions between various entities were investigated by fourier transform infrared spectroscopy and the changes in physical and mechanical properties were studied by a dynamic mechanical analyzer. The corrosion performance of the hybrid coatings was analyzed by direct current polarization method (DCP), electrochemical impedance spectroscopy (EIS) and visual inspection of scribed coated substrates in 3.5wt% NaCl solution. Montmorillonite 15A Clay was used as filler for the neat epoxy ester as well as for hybrid compositions and its concentration was optimized for various systems. The corrosion resistance as well as the barrier properties (reduced diffusivity) of the coatings was enhanced by the addition of organoclay. The morphology of the coatings was observed under scanning electron microscopy. The resultant structure of clay in the polymer clay nanocomposites was analyzed by X-ray diffraction technique and transmission electron microscope. The hybrid coatings are not only better than the epoxy coatings but also outperform the chromated epoxy coatings in the corrosion resistance performance. The scribed coating on aluminum alloy Al 2024-T4 does not show any signs of corrosion even after one year of exposure in 3.5 wt.% NaCl solution. The corrosion inhibition efficiency of clay/hybrid coating after 50 weeks of exposure is 2.7 (x 105 %) as compared to 9.9 (x 104 %) in silane rinse/polyester coating and 2.4 (x 103 %) in chromated epoxy after 4 weeks of exposure. One of the many unique findings of this research is that the corrosion resistance of the developed hybrid coating kept on increasing even after a year of exposure in corrosive environment and the coating seems to have infinite lifetime of corrosion protection. The mechanism of corrosion protection for various compositions of clay hybrid coatings has been explored and correlation between the viscoelastic properties and the corrosion resistance of the coatings has been made."]},{"key":"dc:format","label":"Dc Format","values":["application/pdf","p.194","11. MB"]},{"key":"dc:title","label":"Title","values":["Processing and Properties of Hybrid Silane-Epoxy Nanocomposite Coatings"]}]}],"canonical_facts":{"dc:contributor":["Iroh, Jude"],"dc:creator":["Beemat, Jaspreet S."],"dc:date":["2012"],"dc:description":["This research is focused on the development, analysis and evaluation of the properties of hybrid organoclay composites coatings and membranes. The control material used in this study is water based epoxy ester due to its low volatile organic content and better corrosion resistance than the epoxy resins. The use of epoxy ester is limited by its poor mechanical properties. The durability and mechanical properties of epoxy ester coatings and films were improved by blending it with aromatic polyurea. This concept of hybrid composition of epoxy ester and polyurea is novel and has never been applied before. The glass transition temperature of the epoxy ester films was increased from nearly 30°C to 140°C in the hybrid composition. The damping ability of the epoxy ester was also increased from a narrow range of temperature (30°C to 80°C) to a broader range of temperature (30°C to 230°C) along with the increase in storage modulus (in glassy state as well as in rubbery state). The properties of polyurea and epoxy ester were enhanced by coupling both the polymers with polymethylhydrosiloxane. The corrosion performance of polyurea and epoxy ester blend was also improved by using a combination of silanes (amino silane and epoxy silane). The chemical reactions between various entities were investigated by fourier transform infrared spectroscopy and the changes in physical and mechanical properties were studied by a dynamic mechanical analyzer. The corrosion performance of the hybrid coatings was analyzed by direct current polarization method (DCP), electrochemical impedance spectroscopy (EIS) and visual inspection of scribed coated substrates in 3.5wt% NaCl solution. Montmorillonite 15A Clay was used as filler for the neat epoxy ester as well as for hybrid compositions and its concentration was optimized for various systems. The corrosion resistance as well as the barrier properties (reduced diffusivity) of the coatings was enhanced by the addition of organoclay. The morphology of the coatings was observed under scanning electron microscopy. The resultant structure of clay in the polymer clay nanocomposites was analyzed by X-ray diffraction technique and transmission electron microscope. The hybrid coatings are not only better than the epoxy coatings but also outperform the chromated epoxy coatings in the corrosion resistance performance. The scribed coating on aluminum alloy Al 2024-T4 does not show any signs of corrosion even after one year of exposure in 3.5 wt.% NaCl solution. The corrosion inhibition efficiency of clay/hybrid coating after 50 weeks of exposure is 2.7 (x 105 %) as compared to 9.9 (x 104 %) in silane rinse/polyester coating and 2.4 (x 103 %) in chromated epoxy after 4 weeks of exposure. One of the many unique findings of this research is that the corrosion resistance of the developed hybrid coating kept on increasing even after a year of exposure in corrosive environment and the coating seems to have infinite lifetime of corrosion protection. The mechanism of corrosion protection for various compositions of clay hybrid coatings has been explored and correlation between the viscoelastic properties and the corrosion resistance of the coatings has been made."],"dc:format":["application/pdf","p.194","11. MB"],"dc:identifier":["http://rave.ohiolink.edu/etdc/view?acc_num=ucin1352992819"],"dc:language":["English"],"dc:publisher":["University of Cincinnati / OhioLINK"],"dc:rights":["unrestricted","This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws."],"dc:subject":["Materials Science","Polymer Clay Nanocomposite","Epoxy Ester","Polyurea","Corrosion","Aluminum Alloy","Transmission Electron Microscope"],"dc:title":["Processing and Properties of Hybrid Silane-Epoxy Nanocomposite Coatings"],"dc:type":["Electronic Thesis or Dissertation"],"thesis:degree_discipline":["Engineering and Applied Science: Materials Science"],"thesis:degree_level":["doctoral"],"thesis:degree_name":["PhD"],"thesis:institution_name":["University of Cincinnati"]},"updated_at":"2026-07-24T03:36:23Z"}