Search
In-Out Surface Modification of Halloysite Nanotubes (HNTs) for Excellent Cure of Epoxy: Chemistry and Kinetics Modeling
Abstract
In-out surface modification of halloysite nanotubes (HNTs) has been successfully performed by taking advantage of 8-hydroxyquinolines in the lumen of HNTs and precisely synthesized aniline oligomers (AO) of different lengths (tri- and pentamer) anchored on the external surface of the HNTs. Several analyses, including FTIR, H-NMR, TGA, UV-visible spectroscopy, and SEM, were used to establish the nature of the HNTs’ surface engineering. Nanoparticles were incorporated into epoxy resin at 0.1 wt.% loading for investigation of the contribution of surface chemistry to epoxy cure behavior and kinetics. Nonisothermal differential scanning calorimetry (DSC) data were fed into home-written MATLAB codes, and isoconversional approaches were used to determine the apparent activation energy (Eα) as a function of the extent of cure reaction (α). Compared to pristine HNTs, AO-HNTs facilitated the densification of an epoxy network. Pentamer AO-HNTs with longer arms promoted an Excellent cure; with an Eα value that was 14% lower in the presence of this additive than for neat epoxy, demonstrating an enhanced cross-linking. The model also predicted a triplet of cure (m, n, and ln A) for autocatalytic reaction order, non-catalytic reaction order, and pre-exponential factor, respectively, by the Arrhenius equation. The enhanced autocatalytic reaction in AO-HNTs/epoxy was reflected in a significant rise in the value of m, from 0.11 to 0.28. Kinetic models reliably predict the cure footprint suggested by DSC measurements.
Citations
-
1 6
CrossRef
-
0
Web of Science
-
1 5
Scopus
Authors (7)
-
Shahab Moghari
- University of Tehran
-
Seyed Hassan Jafari
- University of Tehran
-
Mohsen Khodadadi Yazdi
- University of Tehran
-
Maryam Jouyandeh
- University of Tehran
-
Payam Zarrintaj
- Oklahoma State University
Cite as
Full text
- Publication version
- Accepted or Published Version
- DOI:
- Digital Object Identifier (open in new tab) 10.3390/nano11113078
- License
-
open in new tab
Keywords
Details
- Category:
- Articles
- Type:
- artykuły w czasopismach
- Published in:
-
Nanomaterials
no. 11,
ISSN: 2079-4991 - Language:
- English
- Publication year:
- 2021
- Bibliographic description:
- Moghari S., Jafari S. H., Yazdi M. K., Jouyandeh M., Hejna A., Zarrintaj P., Saeb M.: In-Out Surface Modification of Halloysite Nanotubes (HNTs) for Excellent Cure of Epoxy: Chemistry and Kinetics Modeling// Nanomaterials -Vol. 11,iss. 11 (2021), s.3078-
- DOI:
- Digital Object Identifier (open in new tab) 10.3390/nano11113078
- Verified by:
- Gdańsk University of Technology
seen 106 times
Recommended for you
Effect of Surface Treatment of Halloysite Nanotubes (HNTs) on the Kinetics of Epoxy Resin Cure with Amines
- V. Akbari,
- M. Jouyandeh,
- S. Paran
- + 9 authors
Epoxy/Ionic Liquid-Modified Mica Nanocomposites: Network Formation–Network Degradation Correlation
- M. Jouyandeh,
- V. Akbari,
- S. M. R. Paran
- + 4 authors
Biowaste chicken eggshell powder as a potential cure modifier for epoxy/anhydride systems: competitiveness with terpolymer-modified calcium carbonate at low loading levels
- M. Saeb,
- M. Ghaffari,
- H. Rastin
- + 8 authors
Bulk-Surface Modification of Nanoparticles for Developing Highly-Crosslinked Polymer Nanocomposites
- M. Jouyandeh,
- M. Ganjali,
- M. Aghazadeh
- + 3 authors