INIQUI   05448
INSTITUTO DE INVESTIGACIONES PARA LA INDUSTRIA QUIMICA
Unidad Ejecutora - UE
artículos
Título:
Influence of silica and coupling agent loading on thermal, morphological and mechanical properties of hybrid membranes
Autor/es:
ROMERO ANALÍA; PARENTIS MONICA,; SHAM EDGARDO; GONZO ELIO E.
Revista:
POLYMER BULLETIN
Editorial:
SPRINGER
Referencias:
Lugar: Berlin; Año: 2013 vol. 70 p. 2305 - 2317
ISSN:
0170-0839
Resumen:
Hybrid polyetherimide-silica (PEI-SiO2) membranes were synthesized
via the solgel method through the hydrolysis of tetraethoxysilane (TEOS) with
3-aminopropyltriethoxysilane (APTEOS) as a coupling agent. The effects of silica
content and the APTEOS/TEOS ratio in thermal, morphological and mechanical
properties of the hybrid membranes were studied. Although many studies report
improvements in the structure or properties of composite materials when a coupling
agent is used, these contributions do not investigate the effect of the coupling agent
loading on the properties of the new material synthesized. In this study, we prepared
hybrid membrane with a fixed amount of APTEOS modifying TEOS content to
analyze the silica content effect. Conversely, to determine the coupling agent effect,
hybrid membranes were prepared varying the APTEOS content while the amount of
TEOS was kept constant. All hybrid membranes have a dense and uniform internal
structure and exhibit good thermal resistance with a degradation temperature above
544 C. Membranes with 10 wt% of silica showed better tensile strength with a high
modulus and low rupture elongation indicating an effective load transfer between
the phases. Concerning the coupling agent effect, the maximum modulus was
observed for membranes with 10 wt% of APTEOS, suggesting a greater interaction
between the organic and inorganic phases.
Hybrid polyetherimide-silica (PEI-SiO2) membranes were synthesized
via the solgel method through the hydrolysis of tetraethoxysilane (TEOS) with
3-aminopropyltriethoxysilane (APTEOS) as a coupling agent. The effects of silica
content and the APTEOS/TEOS ratio in thermal, morphological and mechanical
properties of the hybrid membranes were studied. Although many studies report
improvements in the structure or properties of composite materials when a coupling
agent is used, these contributions do not investigate the effect of the coupling agent
loading on the properties of the new material synthesized. In this study, we prepared
hybrid membrane with a fixed amount of APTEOS modifying TEOS content to
analyze the silica content effect. Conversely, to determine the coupling agent effect,
hybrid membranes were prepared varying the APTEOS content while the amount of
TEOS was kept constant. All hybrid membranes have a dense and uniform internal
structure and exhibit good thermal resistance with a degradation temperature above
544 C. Membranes with 10 wt% of silica showed better tensile strength with a high
modulus and low rupture elongation indicating an effective load transfer between
the phases. Concerning the coupling agent effect, the maximum modulus was
observed for membranes with 10 wt% of APTEOS, suggesting a greater interaction
between the organic and inorganic phases.
C. Membranes with 10 wt% of silica showed better tensile strength with a high
modulus and low rupture elongation indicating an effective load transfer between
the phases. Concerning the coupling agent effect, the maximum modulus was
observed for membranes with 10 wt% of APTEOS, suggesting a greater interaction
between the organic and inorganic phases.