Preparation of Heat Insulating Nanocomposite Film with MPS (Mercaptopropyl Trimethoxysilane) Coated-Nanoparticles

ABSTRACT

To improve the heat insulating property of plastic films, SiO₂ nanoparticles as inorganic insulating filler were prepared from sodium metasilicate by emulsion method in reverse micelle. MgO, Al₂O₃ and CaO nanoparticles were also prepared. Surface modifications of synthesized heat insulating nanoparticles were accomplished with MPS (mercaptopropyl trimethoxysilane) coating to maximize homogeneous distribution and compatibility between obtained heat insulating nanoparticles and EVA (ethylene vinylacetate). Finally heat insulating films were prepared with MPS coated-heat insulating 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.

Keywords:

• EVA (ethylene vinylacetate)
• heat insulating film

Acknowledgments

This research was supported by the Program for the Training of Graduate Students in Regional Innovation which was conducted by the Ministry of Commerce, Industry and Energy of the Korean Government. Y. J. Kim acknowledges the financial support from Regional Research Center at Hanbat National University.