Effect of Surface Treatment of Halloysite Nanotubes (HNTs) on the Kinetics of Epoxy Resin Cure with Amines
<p dir="ltr">The epoxy/clay nanocomposites have been extensively considered over years because of their low cost and excellent performance. Halloysite nanotubes (HNTs) are unique 1D natural nanofillers with a hollow tubular shape and high aspect ratio. To tackle poor dispersion of th...
محفوظ في:
| المؤلف الرئيسي: | |
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| مؤلفون آخرون: | , , , , , , , , , , |
| منشور في: |
2020
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إضافة وسم
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| _version_ | 1864515935754256384 |
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| author | Vahideh Akbari (18768001) |
| author2 | Maryam Jouyandeh (10769105) Seyed Mohammad Reza Paran (17542299) Mohammad Reza Ganjali (5500373) Hossein Abdollahi (18768004) Henri Vahabi (9247918) Zahed Ahmadi (3237819) Krzysztof Formela (3237816) Amin Esmaeili Khalil Saraei (21625139) Ahmad Mohaddespour (17541948) Sajjad Habibzadeh (5548580) Mohammad Reza Saeb (3237825) |
| author2_role | author author author author author author author author author author author |
| author_facet | Vahideh Akbari (18768001) Maryam Jouyandeh (10769105) Seyed Mohammad Reza Paran (17542299) Mohammad Reza Ganjali (5500373) Hossein Abdollahi (18768004) Henri Vahabi (9247918) Zahed Ahmadi (3237819) Krzysztof Formela (3237816) Amin Esmaeili Khalil Saraei (21625139) Ahmad Mohaddespour (17541948) Sajjad Habibzadeh (5548580) Mohammad Reza Saeb (3237825) |
| author_role | author |
| dc.creator.none.fl_str_mv | Vahideh Akbari (18768001) Maryam Jouyandeh (10769105) Seyed Mohammad Reza Paran (17542299) Mohammad Reza Ganjali (5500373) Hossein Abdollahi (18768004) Henri Vahabi (9247918) Zahed Ahmadi (3237819) Krzysztof Formela (3237816) Amin Esmaeili Khalil Saraei (21625139) Ahmad Mohaddespour (17541948) Sajjad Habibzadeh (5548580) Mohammad Reza Saeb (3237825) |
| dc.date.none.fl_str_mv | 2020-04-17T03:00:00Z |
| dc.identifier.none.fl_str_mv | 10.3390/polym12040930 |
| dc.relation.none.fl_str_mv | https://figshare.com/articles/journal_contribution/Effect_of_Surface_Treatment_of_Halloysite_Nanotubes_HNTs_on_the_Kinetics_of_Epoxy_Resin_Cure_with_Amines/32075922 |
| dc.rights.none.fl_str_mv | CC BY 4.0 info:eu-repo/semantics/openAccess |
| dc.subject.none.fl_str_mv | Chemical sciences Macromolecular and materials chemistry Engineering Materials engineering Cure kinetics Halloysite nanotubes Epoxy Isoconversional method |
| dc.title.none.fl_str_mv | Effect of Surface Treatment of Halloysite Nanotubes (HNTs) on the Kinetics of Epoxy Resin Cure with Amines |
| dc.type.none.fl_str_mv | Text Journal contribution info:eu-repo/semantics/publishedVersion text contribution to journal |
| description | <p dir="ltr">The epoxy/clay nanocomposites have been extensively considered over years because of their low cost and excellent performance. Halloysite nanotubes (HNTs) are unique 1D natural nanofillers with a hollow tubular shape and high aspect ratio. To tackle poor dispersion of the pristine halloysite (P-HNT) in the epoxy matrix, alkali surface-treated HNT (A-HNT) and epoxy silane functionalized HNT (F-HNT) were developed and cured with epoxy resin. Nonisothermal differential scanning calorimetry (DSC) analyses were performed on epoxy nanocomposites containing 0.1 wt.% of P-HNT, A-HNT, and F-HNT. Quantitative analysis of the cure kinetics of epoxy/amine system made by isoconversional Kissinger–Akahira–Sunose (KAS) and Friedman methods made possible calculation of the activation energy (E<sub>α</sub>) as a function of conversion (α). The activation energy gradually increased by increasing α due to the diffusion-control mechanism. However, the average value of E<sub>α</sub> for nanocomposites was lower comparably, suggesting autocatalytic curing mechanism. Detailed assessment revealed that autocatalytic reaction degree, m increased at low heating rate from 0.107 for neat epoxy/amine system to 0.908 and 0.24 for epoxy/P-HNT and epoxy/A-HNT nanocomposites, respectively, whereas epoxy/F-HNT system had m value of 0.072 as a signature of dominance of non-catalytic reactions. At high heating rates, a similar behavior but not that significant was observed due to the accelerated gelation in the system. In fact, by the introduction of nanotubes the mobility of curing moieties decreased resulting in some deviation of experimental cure rate values from the predicted values obtained using KAS and Friedman methods.</p><h2 dir="ltr">Other Information</h2><p dir="ltr">Published in: Polymers<br>License: <a href="https://creativecommons.org/licenses/by/4.0/" target="_blank">https://creativecommons.org/licenses/by/4.0/</a><br>See article on publisher's website: <a href="https://dx.doi.org/10.3390/polym12040930" target="_blank">https://dx.doi.org/10.3390/polym12040930</a></p><p><br></p><p dir="ltr">Disclaimer: The University of Doha for Science and Technology replaced the now-former College of the North Atlantic-Qatar after an Amiri decision in 2022. UDST has become and first national applied University in Qatar; it is also second national University in the country.</p> |
| eu_rights_str_mv | openAccess |
| id | Manara2_e26fe4b721ffcf7e43a8b05f05ccc937 |
| identifier_str_mv | 10.3390/polym12040930 |
| network_acronym_str | Manara2 |
| network_name_str | Manara2 |
| oai_identifier_str | oai:figshare.com:article/32075922 |
| publishDate | 2020 |
| repository.mail.fl_str_mv | |
| repository.name.fl_str_mv | |
| repository_id_str | |
| rights_invalid_str_mv | CC BY 4.0 |
| spelling | Effect of Surface Treatment of Halloysite Nanotubes (HNTs) on the Kinetics of Epoxy Resin Cure with AminesVahideh Akbari (18768001)Maryam Jouyandeh (10769105)Seyed Mohammad Reza Paran (17542299)Mohammad Reza Ganjali (5500373)Hossein Abdollahi (18768004)Henri Vahabi (9247918)Zahed Ahmadi (3237819)Krzysztof Formela (3237816)Amin Esmaeili Khalil Saraei (21625139)Ahmad Mohaddespour (17541948)Sajjad Habibzadeh (5548580)Mohammad Reza Saeb (3237825)Chemical sciencesMacromolecular and materials chemistryEngineeringMaterials engineeringCure kineticsHalloysite nanotubesEpoxyIsoconversional method<p dir="ltr">The epoxy/clay nanocomposites have been extensively considered over years because of their low cost and excellent performance. Halloysite nanotubes (HNTs) are unique 1D natural nanofillers with a hollow tubular shape and high aspect ratio. To tackle poor dispersion of the pristine halloysite (P-HNT) in the epoxy matrix, alkali surface-treated HNT (A-HNT) and epoxy silane functionalized HNT (F-HNT) were developed and cured with epoxy resin. Nonisothermal differential scanning calorimetry (DSC) analyses were performed on epoxy nanocomposites containing 0.1 wt.% of P-HNT, A-HNT, and F-HNT. Quantitative analysis of the cure kinetics of epoxy/amine system made by isoconversional Kissinger–Akahira–Sunose (KAS) and Friedman methods made possible calculation of the activation energy (E<sub>α</sub>) as a function of conversion (α). The activation energy gradually increased by increasing α due to the diffusion-control mechanism. However, the average value of E<sub>α</sub> for nanocomposites was lower comparably, suggesting autocatalytic curing mechanism. Detailed assessment revealed that autocatalytic reaction degree, m increased at low heating rate from 0.107 for neat epoxy/amine system to 0.908 and 0.24 for epoxy/P-HNT and epoxy/A-HNT nanocomposites, respectively, whereas epoxy/F-HNT system had m value of 0.072 as a signature of dominance of non-catalytic reactions. At high heating rates, a similar behavior but not that significant was observed due to the accelerated gelation in the system. In fact, by the introduction of nanotubes the mobility of curing moieties decreased resulting in some deviation of experimental cure rate values from the predicted values obtained using KAS and Friedman methods.</p><h2 dir="ltr">Other Information</h2><p dir="ltr">Published in: Polymers<br>License: <a href="https://creativecommons.org/licenses/by/4.0/" target="_blank">https://creativecommons.org/licenses/by/4.0/</a><br>See article on publisher's website: <a href="https://dx.doi.org/10.3390/polym12040930" target="_blank">https://dx.doi.org/10.3390/polym12040930</a></p><p><br></p><p dir="ltr">Disclaimer: The University of Doha for Science and Technology replaced the now-former College of the North Atlantic-Qatar after an Amiri decision in 2022. UDST has become and first national applied University in Qatar; it is also second national University in the country.</p>2020-04-17T03:00:00ZTextJournal contributioninfo:eu-repo/semantics/publishedVersiontextcontribution to journal10.3390/polym12040930https://figshare.com/articles/journal_contribution/Effect_of_Surface_Treatment_of_Halloysite_Nanotubes_HNTs_on_the_Kinetics_of_Epoxy_Resin_Cure_with_Amines/32075922CC BY 4.0info:eu-repo/semantics/openAccessoai:figshare.com:article/320759222020-04-17T03:00:00Z |
| spellingShingle | Effect of Surface Treatment of Halloysite Nanotubes (HNTs) on the Kinetics of Epoxy Resin Cure with Amines Vahideh Akbari (18768001) Chemical sciences Macromolecular and materials chemistry Engineering Materials engineering Cure kinetics Halloysite nanotubes Epoxy Isoconversional method |
| status_str | publishedVersion |
| title | Effect of Surface Treatment of Halloysite Nanotubes (HNTs) on the Kinetics of Epoxy Resin Cure with Amines |
| title_full | Effect of Surface Treatment of Halloysite Nanotubes (HNTs) on the Kinetics of Epoxy Resin Cure with Amines |
| title_fullStr | Effect of Surface Treatment of Halloysite Nanotubes (HNTs) on the Kinetics of Epoxy Resin Cure with Amines |
| title_full_unstemmed | Effect of Surface Treatment of Halloysite Nanotubes (HNTs) on the Kinetics of Epoxy Resin Cure with Amines |
| title_short | Effect of Surface Treatment of Halloysite Nanotubes (HNTs) on the Kinetics of Epoxy Resin Cure with Amines |
| title_sort | Effect of Surface Treatment of Halloysite Nanotubes (HNTs) on the Kinetics of Epoxy Resin Cure with Amines |
| topic | Chemical sciences Macromolecular and materials chemistry Engineering Materials engineering Cure kinetics Halloysite nanotubes Epoxy Isoconversional method |