Department of Materials Science and Engineering and Rensselaer Nanotechnology Center, Rensselaer Polytechnic Institute, Troy, New York 12180, United States.
ACS Appl Mater Interfaces. 2011 Sep;3(9):3638-45. doi: 10.1021/am200841n. Epub 2011 Aug 18.
Visibly highly transparent indium tin oxide (ITO)/epoxy nanocomposites were prepared by dispersing polyglycidyl methacrylate (PGMA) grafted ITO nanoparticles into a commercial epoxy resin. The oleic acid stabilized, highly crystalline, and near monodisperse ITO nanoparticles were synthesized via a nonaqueous synthetic route with multigram batch quantities. An azido-phosphate ligand was synthesized and used to exchange with oleic acid on the ITO surface. The azide terminal group allows for the grafting of epoxy resin compatible PGMA polymer chains via Cu(I) catalyzed alkyne-azide "click" chemistry. Transmission electron microscopy (TEM) observation shows that PGMA grafted ITO particles were homogeneously dispersed within the epoxy matrix. Optical properties of ITO/epoxy nanocomposites with different ITO concentrations were studied with an ultraviolet-visible-near-infrared (UV-vis-NIR) spectrometer. All the ITO/epoxy nanocomposites show more than 90% optical transparency in the visible light range and absorption of UV light from 300 to 400 nm. In the near-infrared region, ITO/epoxy nanocomposites demonstrate low transmittance and the infrared (IR) transmission cutoff wavelength of the composites shifts toward the lower wavelength with increased ITO concentration. The ITO/epoxy nanocomposites were applied onto both glass and plastic substrates as visibly transparent and UV/IR opaque optical coatings.
可见高透明铟锡氧化物 (ITO)/环氧树脂纳米复合材料是通过将聚甲基丙烯酸缩水甘油酯 (PGMA) 接枝的 ITO 纳米粒子分散到商业环氧树脂中制备的。采用非水合成路线，以多克批量合成了油酸稳定的、高结晶度的、近单分散的 ITO 纳米粒子。合成了叠氮磷酸配体，并用于与 ITO 表面的油酸交换。末端的叠氮基团允许通过铜 (I) 催化的炔烃-叠氮化物“点击”化学接枝与环氧树脂相容的 PGMA 聚合物链。透射电子显微镜 (TEM) 观察表明，PGMA 接枝的 ITO 颗粒均匀分散在环氧树脂基质中。用紫外可见近红外 (UV-vis-NIR) 分光光度计研究了不同 ITO 浓度的 ITO/环氧树脂纳米复合材料的光学性质。所有 ITO/环氧树脂纳米复合材料在可见光范围内的透光率均超过 90%，并吸收 300 至 400nm 的紫外光。在近红外区域，ITO/环氧树脂纳米复合材料表现出低透光率，复合材料的红外 (IR) 透射截止波长随 ITO 浓度的增加而向低波长移动。ITO/环氧树脂纳米复合材料被应用于玻璃和塑料基板上，作为可见透明和 UV/IR 不透明的光学涂层。
