Fabrication and Evaluation of Transparent Hygroscopic Resin Dispersed with Nano-Sized Zeolite

抄録

Transparent hygroscopic composite films using 4A zeolite particles with a primary particle size of 50 nm, which is smaller than the wavelength of visible light, with the ability to absorb moisture as a filler were fabricated. Nano-sized 4A zeolite has the following problems as a filler of resin. The nano-sized particles easily agglomerate and it is particularly difficult to disperse into a hydrophobic resin. Therefore, in order to improve dispersibility, the surface of nano-size 4A zeolite was modified by using surface modifiers. Furthermore, in this work, it was found that the surface modifiers with different refractive indices resulted in mixtures of zeolite and resin with different optical properties. In other words, the use of a surface modifier with a refractive index close to that of the resin was found to yield a transparent hygroscopic film. Finally, a transparent resin sheet with zeolite content of 30wt% and the haze of less than 30% was fabricated. The dispersibility and transparency were improved by treating zeolite with a primary particle size of 50 nm by a surface modifier of high refractive index, and mixing it with a resin of low refractive index.