{"id":{"repo_id":"unt","oai_identifier":"info:ark/67531/metadc4786"},"canonical_url":"https://search.dev.ndltd.org/etd/unt/info:ark/67531/metadc4786","repository":{"repo_id":"unt","name":"University of North Texas","base_url":"https://digital.library.unt.edu/oai/"},"display":{"title":"Charge Interaction Effects in Epoxy with Cation Exchanged Montmorillonite Clay and Carbon Nanotubes.","abstract":"The influence of charge heterogeneity in nanoparticles such as montmorillonite layered silicates (MLS) and hybrid systems of MLS + carbon nanotubes was investigated in cured and uncured epoxy. Epoxy nanocomposites made with cation-exchanged montmorillonite clay were found to form agglomerates near a critical concentration. Using differential scanning calorimetry it was determined that the mixing temperature of the epoxy + MLS mixture prior to the addition of the curing agent critically influenced the formation of the agglomerate. Cured epoxy samples showed evidence of the agglomerate being residual charge driven by maxima and minima in the concentration profiles of thermal conductivity and dielectric permittivity respectively. A hybrid nanocomposite of MLS and aniline functionalized multi walled nanotubes indicated no agglomerates. The influence of environmentally and process driven properties on the nanocomposites was investigated by examination of moisture, ultrasound, microwaves and mechanical fatigue on the properties of the hybrid systems. The results point to the importance of charge screening by adsorbed or reacted water and on nanoparticulates.","abstract_html":"The influence of charge heterogeneity in nanoparticles such as montmorillonite layered silicates (MLS) and hybrid systems of MLS + carbon nanotubes was investigated in cured and uncured epoxy. Epoxy nanocomposites made with cation-exchanged montmorillonite clay were found to form agglomerates near a critical concentration. Using differential scanning calorimetry it was determined that the mixing temperature of the epoxy + MLS mixture prior to the addition of the curing agent critically influenced the formation of the agglomerate. Cured epoxy samples showed evidence of the agglomerate being residual charge driven by maxima and minima in the concentration profiles of thermal conductivity and dielectric permittivity respectively. A hybrid nanocomposite of MLS and aniline functionalized multi walled nanotubes indicated no agglomerates. The influence of environmentally and process driven properties on the nanocomposites was investigated by examination of moisture, ultrasound, microwaves and mechanical fatigue on the properties of the hybrid systems. The results point to the importance of charge screening by adsorbed or reacted water and on nanoparticulates.","abstract_has_math":false,"creators":["Butzloff, Peter Robert"],"institution":"University of North Texas","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":["D'Souza, Nandika Anne, 1967-","Reidy, Richard","Brostow, Witold, 1934-","Bouanani, Mohamed El","Kaufman, Michael"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2005,"date_issued":"2005-05","date_published":"2005-05","updated_at":"2026-07-24T05:35:09Z","subjects":["Epoxy compounds.","Composite materials.","Montmorillonite.","Nanotubes.","montmorillonite layered silicates","montmorillonite clay","carbon nanotubes","charge effects"],"languages":["English"],"rights":["Public","Copyright","Butzloff, Peter Robert","Copyright is held by the author, unless otherwise noted. All rights reserved."],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["oclc: 61850682","https://digital.library.unt.edu/ark:/67531/metadc4786/","ark: ark:/67531/metadc4786"],"render_values":[{"text":"oclc: 61850682","href":null,"code":true},{"text":"https://digital.library.unt.edu/ark:/67531/metadc4786/","href":"https://digital.library.unt.edu/ark:/67531/metadc4786/","code":true},{"text":"ark: ark:/67531/metadc4786","href":null,"code":true}]}]},"links":{"outbound_url":"https://doi.org/10.12794/metadc4786","outbound_label":"DOI","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["D'Souza, Nandika Anne, 1967-","Reidy, Richard","Brostow, Witold, 1934-","Bouanani, Mohamed El","Kaufman, Michael"]},{"key":"dc:creator","label":"Author","values":["Butzloff, Peter Robert"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2005-05"]},{"key":"dc:publisher","label":"Institution","values":["University of North Texas"]},{"key":"dc:type","label":"Dc Type","values":["Thesis or Dissertation"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Epoxy compounds.","Composite materials.","Montmorillonite.","Nanotubes.","montmorillonite layered silicates","montmorillonite clay","carbon nanotubes","charge effects"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["English"]},{"key":"dc:rights","label":"Dc Rights","values":["Public","Copyright","Butzloff, Peter Robert","Copyright is held by the author, unless otherwise noted. All rights reserved."]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["oclc: 61850682","doi: 10.12794/metadc4786","https://digital.library.unt.edu/ark:/67531/metadc4786/","ark: ark:/67531/metadc4786"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["The influence of charge heterogeneity in nanoparticles such as montmorillonite layered silicates (MLS) and hybrid systems of MLS + carbon nanotubes was investigated in cured and uncured epoxy. Epoxy nanocomposites made with cation-exchanged montmorillonite clay were found to form agglomerates near a critical concentration. Using differential scanning calorimetry it was determined that the mixing temperature of the epoxy + MLS mixture prior to the addition of the curing agent critically influenced the formation of the agglomerate. Cured epoxy samples showed evidence of the agglomerate being residual charge driven by maxima and minima in the concentration profiles of thermal conductivity and dielectric permittivity respectively. A hybrid nanocomposite of MLS and aniline functionalized multi walled nanotubes indicated no agglomerates. The influence of environmentally and process driven properties on the nanocomposites was investigated by examination of moisture, ultrasound, microwaves and mechanical fatigue on the properties of the hybrid systems. The results point to the importance of charge screening by adsorbed or reacted water and on nanoparticulates."]},{"key":"dc:format","label":"Dc Format","values":["Text"]},{"key":"dc:title","label":"Title","values":["Charge Interaction Effects in Epoxy with Cation Exchanged Montmorillonite Clay and Carbon Nanotubes."]}]}],"canonical_facts":{"dc:contributor":["D'Souza, Nandika Anne, 1967-","Reidy, Richard","Brostow, Witold, 1934-","Bouanani, Mohamed El","Kaufman, Michael"],"dc:creator":["Butzloff, Peter Robert"],"dc:date":["2005-05"],"dc:description":["The influence of charge heterogeneity in nanoparticles such as montmorillonite layered silicates (MLS) and hybrid systems of MLS + carbon nanotubes was investigated in cured and uncured epoxy. Epoxy nanocomposites made with cation-exchanged montmorillonite clay were found to form agglomerates near a critical concentration. Using differential scanning calorimetry it was determined that the mixing temperature of the epoxy + MLS mixture prior to the addition of the curing agent critically influenced the formation of the agglomerate. Cured epoxy samples showed evidence of the agglomerate being residual charge driven by maxima and minima in the concentration profiles of thermal conductivity and dielectric permittivity respectively. A hybrid nanocomposite of MLS and aniline functionalized multi walled nanotubes indicated no agglomerates. The influence of environmentally and process driven properties on the nanocomposites was investigated by examination of moisture, ultrasound, microwaves and mechanical fatigue on the properties of the hybrid systems. The results point to the importance of charge screening by adsorbed or reacted water and on nanoparticulates."],"dc:format":["Text"],"dc:identifier":["oclc: 61850682","doi: 10.12794/metadc4786","https://digital.library.unt.edu/ark:/67531/metadc4786/","ark: ark:/67531/metadc4786"],"dc:language":["English"],"dc:publisher":["University of North Texas"],"dc:rights":["Public","Copyright","Butzloff, Peter Robert","Copyright is held by the author, unless otherwise noted. All rights reserved."],"dc:subject":["Epoxy compounds.","Composite materials.","Montmorillonite.","Nanotubes.","montmorillonite layered silicates","montmorillonite clay","carbon nanotubes","charge effects"],"dc:title":["Charge Interaction Effects in Epoxy with Cation Exchanged Montmorillonite Clay and Carbon Nanotubes."],"dc:type":["Thesis or Dissertation"]},"updated_at":"2026-07-24T05:35:09Z"}