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Aqueous-based functionalizations of titanate nanotubes: a straightforward route to high-performance epoxy composites with interfacially bonded nanofillers

SYSNO ASEP	0492561
Druh ASEP	J - Článek v odborném periodiku
Zařazení RIV	J - Článek v odborném periodiku
Poddruh J	Článek ve WOS
Název	Aqueous-based functionalizations of titanate nanotubes: a straightforward route to high-performance epoxy composites with interfacially bonded nanofillers
Tvůrce(i)	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, ORCID}
Zdroj.dok.	Macromolecules. - : American Chemical Society - ISSN 0024-9297 Roč. 51, č. 15 (2018), s. 5989-6002
Poč.str.	14 s.
Jazyk dok.	eng - angličtina
Země vyd.	US - Spojené státy americké
Klíč. slova	titanate nanotube ; surface modification ; epoxy kinetics
Vědní obor RIV	CD - Makromolekulární chemie
Obor OECD	Polymer science
CEP	GA17-08273S GA ČR - Grantová agentura ČR
	LO1507 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy
Institucionální podpora	UMCH-V - RVO:61389013
UT WOS	000442185700055
EID SCOPUS	85051531633
DOI	10.1021/acs.macromol.8b01204
Anotace	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.
Pracoviště	Ústav makromolekulární chemie
Kontakt	Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358
Rok sběru	2019

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