Issue 5, 2013
From the journal:

Polymer Chemistry

Tri-ureasil gel as a multifunctional organic–inorganic hybrid matrix†

Eduardo Ferreira Molina,*a   Liziane Marçal,a   Hudson Wallace Pereira de Carvalho,b   Eduardo José Nassara  and  Kátia Jorge Ciuffia  

* Corresponding authors

a Universidade de Franca, Av. Dr Armando Salles Oliveira 201, 14404-600 Franca, SP, Brazil
E-mail: efmolina@unifran.br
Tel: +55 16 37116989

b Karlsruhe Institute of Technology (KIT), Engesserstr., 20, 76131 Karlsruhe, Germany
E-mail: hudson.carvalho@kit.edu

Abstract

We report on a novel transparent, flexible, rubbery, and insoluble tri-ureasil organic–inorganic hybrid material with multifunctional characteristics and potential application in drug delivery, water purification, and photochromic materials. We obtained the tri-ureasil gels by the one-pot sol–gel route using 3-isocyanatopropyltriethoxysilane and glyceryl poly(oxypropylene)triamine of molecular weight 5000 g mol−1 (Jeffamine® T5000). This approach generated a silica backbone covalently connected with poly(oxyalkylene) chains PPO(OCH–CH3CH2)n through urea bridges. We characterized the obtained materials by DSC, swelling tests, XRD, 29Si NMR, and small-angle X-ray scattering (SAXS). The results attested that the tri-ureasil hybrids are potentially applicable as photochromic devices, drug delivery systems, and adsorbents of pollutants from contaminated waters.

Graphical abstract: Tri-ureasil gel as a multifunctional organic–inorganic hybrid matrix

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DOI
https://doi.org/10.1039/C2PY21049E
Article type
Paper
Submitted
28 Nov 2012
Accepted
04 Dec 2012
First published
04 Dec 2012

Polym. Chem., 2013,4, 1575-1582

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Tri-ureasil gel as a multifunctional organic–inorganic hybrid matrix

E. F. Molina, L. Marçal, H. W. Pereira de Carvalho, E. J. Nassar and K. J. Ciuffi, Polym. Chem., 2013, 4, 1575 DOI: 10.1039/C2PY21049E

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