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Microencapsulation of an acrylate monomer in silica particles by sol–gel process

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Abstract

The sol–gel synthesis strategies combined with the templated growth of organic–inorganic hybrid networks provide access to an immense new area of innovative multi-functional advanced materials. One possible way to prepare such new advanced materials is to encapsulate liquid active agents (such as monomers, dyes, catalysts and hardeners) in microcapsules. Silica microcapsules of tetraethylortosilicate (TEOS) and 3-(trimethoxysilyl)propyl methacrylate (MPTS) were prepared in a precursor-monomer/NH4OH water microemulsion system. Trimethylolpropane triacrylate (TMPTA)—a trifunctional monomer useful in manufacturing of coatings, inks and adhesives—and a corresponding photoinitiator (DAROCUR 1173) were entrapped inside the obtained microcapsules. MPTS was used to increase compatibility between TMPTA and the sol–gel precursors. As stability agent we added a “home made” product resulted from functionalization of poly (ethylene glycol) methyl ether (MPEG) with (3-isocyanatopropyl) triethoxysilane (NCOTEOS). Were obtained microcapsules containing incorporated monomer and having average particle size in range of 0.5–50 μm. Thermal analysis, morphology study and the increase of the silica microcapsules average diameter, measured by DLS technique confirm the monomer encapsulation.

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Acknowledgments

The financial support of European Social Fund—“Cristofor I. Simionescu” Postdoctoral Fellowship Programme (ID POSDRU/89/1.5/S/55216), Sectoral Operational Programme Human Resources Development 2007–2013 is acknowledged.

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Authors and Affiliations

  1. “Petru Poni” Institute of Macromolecular Chemistry, 41 A Grigore Ghica Voda Alley, 700487, Iasi, Romania

    Cristina Lavinia Nistor

  2. National Research and Development Institute for Chemistry and Petrochemistry, Splaiul Independentei 202-6, P.O. Box 174/35, 060021, Bucharest, Romania

    Cristina Lavinia Nistor, Dan Donescu & Marius Ghiurea

  3. Research and Development Department, Catalyse Company, Master Park—lot no. 25, 116 Bd de la Pomme 13011, Marseille, France

    Alain Perichaud & Wael Ballout

Authors
  1. Cristina Lavinia Nistor
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  2. Dan Donescu
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  3. Alain Perichaud
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  4. Wael Ballout
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  5. Marius Ghiurea
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Correspondence to Cristina Lavinia Nistor.

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Nistor, C.L., Donescu, D., Perichaud, A. et al. Microencapsulation of an acrylate monomer in silica particles by sol–gel process. J Sol-Gel Sci Technol 57, 164–171 (2011). https://doi.org/10.1007/s10971-010-2337-z

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  • DOI: https://doi.org/10.1007/s10971-010-2337-z

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