PREPARATION OF HEAT INSULATING FILM WITH MPS (MERCAPTOPROPYL TRIMETHOXYSILANE) COATED-SiO₂ NANOPARTICLES.

YOUNG SOO KANG; YOUNG HWAN KIM; YONG JOO KIM

To improve the heat insulating property of EVA (ethylene vinylacetate), monodispersed spherical SiO2 nanoparticles as inorganic insulating filler were prepared from sodium metasilicate by emulsion method in reverse micelle. In order to make a comparative study about effect of dispersibility on mechanical properties, aggregated microsized-SiO2 particles were also prepared. Surface modifications of synthesized SiO2 nanoparticles were accomplished with MPS (mercaptopropyl trimethoxysilane) to maximize homogeneous distribution and compatibility between obtained SiO2 nanoparticles and EVA. Finally heat insulating nanocomposite film was prepared with MPS coated-SiO2 nanoparticles at the ratio of 2 wt% and EVA. The insulating capacity was tested by IR spectroscopy and light transmission was observed by UV-vis spectroscopy. The mechanical properties such as tensile strength, elongation, impact strength, tear strength, clarity and haze were also studied.

ETHYLENE; VINYL acetate; THERMAL insulation; NANOPARTICLES; REVERSED micelles; SILICON oxide films

International Journal of Nanoscience, 2006, Vol 5, Issue 2/3, p323

0219-581X

Academic Journal

10.1142/S0219581X06004425