期刊
MATERIALS CHEMISTRY AND PHYSICS
卷 152, 期 -, 页码 69-76出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.matchemphys.2014.12.015
关键词
Polymers; Thermogravimetric analysis; Thermal properties; Surface properties
资金
- FONDECYT [11121291, 3140130, 3140157]
- PIA [ACT-130]
- CIPA-CONICYT Regional [R08C1002]
- REDOC (MINEDUC project at University of Concepcion) [UCO1202]
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, Si-29 and C-13 solid state NMR, and N-2 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. (C) 2014 Elsevier B.V. All rights reserved.
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