NDLI: TEOS-based consolidants for carbonate stones: the role of N1-(3-trimethoxysilylpropyl)diethylenetriamine

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TEOS-based consolidants for carbonate stones: the role of N1-(3-trimethoxysilylpropyl)diethylenetriamine

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New Journal of Chemistry Vol - 41 Issue - 5

New Journal of Chemistry Vol - 41 Issue - 4

New Journal of Chemistry Vol - 41 Issue - 3

New Journal of Chemistry Vol - 41 Issue - 2

New Journal of Chemistry Vol - 41 Issue - 1

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TEOS-based consolidants for carbonate stones: the role of N1-(3-trimethoxysilylpropyl)diethylenetriamine

Content Provider	Royal Society of Chemistry (RSC)
Author	Montemor, M. F. Pinto, A. P. Ferreira Ferreira, Maria João Fonseca, B. Sena da Piçarra, S.
Copyright Year	2017
Abstract	For several years functional organosilanes containing NH groups have been tested to improve the performance of TEOS-based consolidants for carbonate stones, however different efficacies are being reported and the role of side-effects in sol–gel routes is still unclear. The present study aims at improving the efficacy of a formulation for carbonate stone consolidation by adding N1-(3-trimethoxysilylpropyl)diethylenetriamine (SiDETA) to previously developed TEOS-based consolidants. While xerogels derived from reference sols were transparent, dense, and with smooth morphology, SiDETA-modified xerogels were translucent, coarser and composed of interconnected nanosized particles. It was concluded that SiDETA changed the mechanism of silica network formation by modifying the sol's pH, acting as a nucleation center, and by ionic interactions. Despite the changes in the silica network structure, SiDETA incorporation showed to cause additional strength increments on the treated stone.
Starting Page	2458
Ending Page	2467
Page Count	10
File Format	HTM / HTML PDF
ISSN	11440546
Volume Number	41
Issue Number	6
Journal	New Journal of Chemistry
DOI	10.1039/c6nj03808e
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Diethylenetriamine Nucleation PH Silicon dioxide
Content Type	Text
Resource Type	Article
Subject	Chemistry Materials Chemistry Catalysis

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