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Structural evolution during evaporation of a 3-glycidoxypropyltrimethoxysilane film studied in situ by time resolved infrared spectroscopy

Innocenzi, Plinio and Figus, Cristina and Takahashi, Masahide and Piccinini, Massimo and Malfatti, Luca (2011) Structural evolution during evaporation of a 3-glycidoxypropyltrimethoxysilane film studied in situ by time resolved infrared spectroscopy. The Journal of Physical Chemistry. A, Vol. 115 (38), p. 10438-10444. eISSN 1520-5215. Article.

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DOI: 10.1021/jp204314b

Abstract

Time resolved infrared spectroscopy has been applied to study in situ the evaporation process of a 3-glycidoxypropyltrimethoxysilane hybrid sol by casting a droplet on a ZnSe substrate; the analysis has been performed in the middle-infrared range and in the near-infrared range. The experiment has allowed following the structural changes induced by water evaporation and the formation of ordered structures within the cast film; the CH2 scissoring bands have been used as a fingerprint for the disorder to order transition of the hybrid. The experiment has been done using both a fresh sol and an aged sol which produce respectively an amorphous material and a crystalline hybrid material. The analysis has shown that the epoxy groups do not react during the evaporation while the silica structure shows only a slight condensation and an increase in open cage-like species. At the end of evaporation the hybrid has a “soft-like” state which allows structural rearrangements to self-order.

Item Type:Article
ID Code:6678
Status:Published
Refereed:Yes
Uncontrolled Keywords:3-glycidoxypropyltrimethoxysilane (GPTMS) film, evaporation processes, infrared spectroscopy
Subjects:Area 09 - Ingegneria industriale e dell'informazione > ING-IND/22 Scienza e tecnologia dei materiali
Divisions:002 Altri enti e centri di ricerca del Nord Sardegna > Porto Conte Ricerche, Alghero
001 Università di Sassari > 01 Dipartimenti > Architettura e pianificazione > LMNT-Laboratorio di Scienza dei Materiali e NanoTecnologie
001 Università di Sassari > 01 Dipartimenti > Architettura e pianificazione
Publisher:American Chemical Society
eISSN:1520-5215
Deposited On:24 Nov 2011 16:08

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