| 초록 |
Mesoporous silica nanoparticles (MSNs) with uniform size (＜ 50 nm) yet with different pore diameters were synthesized, and used as a filler in poly(ether sulfone) (PES) films in order to decrease its coefficient of thermal expansion (CTE) without sacrificing optical transparency. Here both CTE and optical transparency of the MSN/PES nanocomposite films gradually decreased with increasing MSN concentration. The PES films containing MSNs with larger pores showed the best performance in CTE and optical transparency. While the CTE decreased by 32.3% with increasing MSN content up to 0.5 wt%, the optical transparency decreased by only less than 6.9% because of small and uniform particle size less than 50 nm which minimizes the light scattering. The effect of the silica nanoparticles was investigated on not only the thermal stability but also the mechanical stability. We expect the MSNs synthesized in this study to be used as a promising filler to enhance the thermal and mechanical stability of the PES substrate without sacrificing its optical transparency. |
