UCL Discovery
UCL home » Library Services » Electronic resources » UCL Discovery

Analysis of the interaction of vinyl and carbonyl silanes with carbon nanofiber surfaces

Nistal, A; Palencia, C; Alejandra Mazo, M; Rubio, F; Rubio, J; Luis Oteo, J; (2011) Analysis of the interaction of vinyl and carbonyl silanes with carbon nanofiber surfaces. Carbon , 49 (5) pp. 1635-1645. 10.1016/j.carbon.2010.12.047. Green open access

[thumbnail of Nistal Gonzalez_Analysis of the Interaction of Vinyl and Carbonyl Silanes with Carbon Nanofiber Surfaces_ACCEPTED.pdf]
Preview
Text
Nistal Gonzalez_Analysis of the Interaction of Vinyl and Carbonyl Silanes with Carbon Nanofiber Surfaces_ACCEPTED.pdf - Accepted Version

Download (861kB) | Preview

Abstract

Carbon nanofibers (CNFs) have been treated with vinyltryethoxy silane (VTS) and 3-metacryloxypropyltrimethoxy silane (MPS). CNF–silane interactions have been analyzed by means of TGA, FTIR-ATR, TEM, HRTEM, SEM and nitrogen adsorption. For similar silane concentration solutions TG analysis has shown that VTS and MPS form one and three silane monolayers, respectively. This has also been corroborated by the presence of an FTIR-ATR band at 1250 cm−1 assigned to Si–O–Si bonds of silica layers. For low silane concentrations, the vinyl group of VTS is bonded to the graphene CNF surface mainly through π–π interactions. However, MPS interacts through the carbonyl group with hydroxyl groups of graphene defect sheets existing probably in micropores. Silanol–CNF hydroxyl interactions are also expected at these silane concentrations. For high silane concentration, when the silica layer is formed, both silanes present vinyl free and carbonyl free groups, as observed by the 1370 and 1686 cm−1 FTIR-ATR bands, respectively. Nitrogen adsorption has shown that while VTS is adsorbed mainly on the defect free graphene surface, MPS is adsorbed on the micropores and, therefore on the hydroxyl defect graphene sites. These results are finally correlated with the dispersion stability of both silanes on water and styrene solutions.

Type: Article
Title: Analysis of the interaction of vinyl and carbonyl silanes with carbon nanofiber surfaces
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.carbon.2010.12.047
Publisher version: https://doi.org/10.1016/j.carbon.2010.12.047
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > MAPS Faculty Office
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > MAPS Faculty Office > Institute for Materials Discovery
URI: https://discovery.ucl.ac.uk/id/eprint/10059423
Downloads since deposit
157Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item