Composite hydrogel based on surface modified mesoporous silica and poly[(2-acryloyloxy)ethyl trimethylammonium chloride]

Cecilia C. Torres, Bruno F. Urbano, Cristian H. Campos, Bernabé L. Rivas, Patricio Reyes

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

This work focused on the synthesis, characterization and water absorbency of a composite hydrogel based on poly[(2-acryloyloxy)ethyl trimethylammonium chloride] and mesoporous silica, MCM-41. The MCM-41 was synthesized and later surface functionalized with triethoxyvinylsilane (VTES) and 3-trimethoxysilylpropylmethacrylate (TMSPM) by a post-grafting procedure. The composite hydrogels were obtained by in-situ polymerization using a mixture of monomer, crosslinker and initiator in the presence of functionalized MCM-41. Diverse characterization techniques were used at the different stages of synthesis, namely, FT-IR, TEM, SEM, DRX, 29Si and 13C solid state NMR, and N2 adsorption isotherms at 77 K. Finally, the water uptake performance of the composites was tested as a function of time, mesoporous silica loading and coupling agent used at the functionalization. The composites using non-functionalized MCM-41 reached the highest water uptake, whereas those composite with MCM-41 TMSPM exhibited the lowest sorption.

Original languageEnglish
Pages (from-to)69-76
Number of pages8
JournalMaterials Chemistry and Physics
Volume152
DOIs
Publication statusPublished - 15 Feb 2015

Keywords

  • Polymers
  • Surface properties
  • Thermal properties
  • Thermogravimetric analysis

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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