本研究以分散聚合法合成出粒徑2μm的聚苯乙烯(PS)及1.8μm聚苯乙烯-甲基丙烯酸甲酯(PS-MMA)圓球狀顆粒，再利用SLS-SFS起始的方式將乙烯系單體縮水甘油甲基丙烯酸酯-亞胺乙二酸(GMA-IDA)接枝到顆粒表面形成核/殼狀結構顆粒，接著將二氧化鈦(TiO2)奈米顆粒吸附到PS顆粒表面形成PSGT擴散粒。藉由SEM觀察，可以看出二氧化鈦奈米顆粒均勻吸附在表面；EDS元素分析可以證實其表面確實有吸附二氧化鈦奈米顆粒，後續利用水性樹酯與PSGT擴散粒混和塗佈於PET薄膜上形成光擴散膜。擴散粒顆粒表面上具有高折射率的二氧化鈦奈米顆粒，能使光線在薄膜中具有較多的折射、反射及散射的現象，使擴散粒具有更佳的光擴散效果。目前市面上的擴散膜無法同時達到高穿透度及高霧度的效果，而本研究所製備的PSGT光擴散膜藉由穿透度霧度儀量測可發現隨著顆粒濃度的增加，薄膜的霧度有明顯的提升，但對於全光穿透度的影響較不明顯，當PSGT擴散粒的重量百分比達30%時，薄膜具有最佳的霧度81.95%及88.18%的全光穿透度，可同時達到高霧度及高穿透度的效果。後續再將藍光吸收劑4-苯偶氮基苯酚(PAP)導入，藉由擴散粒的特性使光線在薄膜之中來回反射、散射達到增加光徑的效果，進而增加光與藍光吸收劑接觸的機率達到增加藍光吸收並使光均勻擴散的效果。藉由UV-VIS的量測可發現導入擴散粒的藍光吸收薄膜，在相同的藍光吸收劑含量下，添加20%的PSGT擴散粒可以有效地增加約12%的藍光吸收並同時保有高霧度的效果。另一方面，本研究藉由合成出與樹酯折射率相近的PSMMA顆粒作為載體，將氧化銫鎢(CWO)紅外線吸收顆粒吸附至PSMMA顆粒表面，藉由UV-VIS以及穿透度霧度儀的量測結果可以看出PSMCWO可以有效地增加可見光波段的穿透率，並藉由雙面塗佈的方式降低介面之間的折射率差距減少介面之間的反射，能再次使其薄膜的穿透率提高，且不影響到紅外線吸收的效果。

In the first part of the research, we prepared polystyrene (PS) and polystyrene-methyl methacrylate (PS-MAMA) microspheres by dispersion polymerization. After that, we grafted the Glycidyl methacrylate-Iminodiacetic acid (GMA-IDA) monomer onto the PS and PSMMA particles by SLS-SFS initiated seed polymerization to form a core/shell structure. With the property of the GMA-IDA monomer, we can adsorb the TiO2 and CWO (IR absorber) nanoparticles onto the microspheres to form PSGT (diffusive agent) and PSMCWO (IR blocking particles). Afterward, we dispersed the PSGT/PSMCWO into the epoxy and coated the mixture onto the PET film to form the light diffuser film and IR blocking film. Compare to the commercial product, our light diffuser film has higher a haze without obvious transmittance declined and the IR blocking film has higher transmittance. Then, we add the 4-phenylazophenol (PAP) blue light absorber into the epoxy as the dispersed phase to combine with the diffusive agent PSGT. From the UV-vis spectrum, we found that as we increase the weight percentage of the PSGT the transmittance of the blue light (at 450nm) will decrease. In other words, the more of the PSGT was added the more of the blue light will be blocked. After adding 20% PSGT, it can block about 12% more blue light.

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