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Aqueous-based functionalizations of titanate nanotubes: a straightforward route to high-performance epoxy composites with interfacially bonded nanofillers
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SYSNO ASEP 0492561 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Aqueous-based functionalizations of titanate nanotubes: a straightforward route to high-performance epoxy composites with interfacially bonded nanofillers Author(s) Beneš, Hynek (UMCH-V) RID, ORCID
Popelková, Daniela (UMCH-V)
Šturcová, Adriana (UMCH-V) RID
Popelka, Štěpán (UMCH-V) RID
Jůza, Josef (UMCH-V) RID, ORCID
Pop-Georgievski, Ognen (UMCH-V) RID, ORCID
Konefal, Magdalena (UMCH-V) ORCID, RID
Hrubý, Martin (UMCH-V) RID, ORCIDSource Title Macromolecules. - : American Chemical Society - ISSN 0024-9297
Roč. 51, č. 15 (2018), s. 5989-6002Number of pages 14 s. Language eng - English Country US - United States Keywords titanate nanotube ; surface modification ; epoxy kinetics Subject RIV CD - Macromolecular Chemistry OECD category Polymer science R&D Projects GA17-08273S GA ČR - Czech Science Foundation (CSF) LO1507 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support UMCH-V - RVO:61389013 UT WOS 000442185700055 EID SCOPUS 85051531633 DOI 10.1021/acs.macromol.8b01204 Annotation Nanotube surface treatment is crucial in preparation of high-quality nanomaterials for advanced applications. Herein, we provide an environmentally friendly and practical route to the design of high performance composites using the surface chemistry of titanate nanotubes (TiNT) to enhance the interfacial nanotube-epoxy bonding. Insights presented here improve understanding of how different organic layers (a low-molecular-weight bisphosphonate (APMBP), branched polyethylenimine (PEI), or polydopamine (PDA)) coated on TiNT surface and bearing active hydrogen functionalities (NH, OH) affect epoxy-amine cross-link reaction and network buildup and consequently morphology and thermomechanical properties of the final epoxy-TiNT composites. The kinetics of cross-linking was experimentally studied and successfully fitted by a mechanistic kinetic model, which considered the effects of NH and OH functionalities. We found that APMBP was not involved in the epoxy-amine cross-link reaction entering only into physical interactions with epoxy precursors, while the PEI and PDA modifications of TiNT accelerated cross-linking and formed covalent linkages with the epoxy network. All functionalizations improved dispersion of TiNT in the epoxy-amine matrix. The prepared epoxy/TiNT composites showed a dramatic increase in the rubbery storage modulus (up to +92%) and an excellent thermal stability with the onset degradation temperature of proximately 400 °C. This study demonstrates that TiNT functionalized with fully aqueous-based protocols are promising alternatives to carbon nanotubes in epoxy composites. Workplace Institute of Macromolecular Chemistry Contact Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358 Year of Publishing 2019
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