Monodispersed ZnO Nanoparticle-Poly(methyl methacrylate) Composites with Visible Transparency for Ultraviolet Shielding Applications
Monodispersed ZnO Nanoparticle-Poly(methyl methacrylate) Composites with Visible Transparency for Ultraviolet Shielding Applications
复制标题
用于紫外线屏蔽应用的具有可见光透明度的单分散氧化锌纳米颗粒-聚甲基丙烯酸甲酯复合材料
DOI：
10.1021/acsanm.0c01723
复制
发表时间：
2020-09-25
影响因子：
5.9
通讯作者：
Chen, Jian-Feng
中科院分区：
文献类型：
--
作者：
Cui, Chang-Wei;Yang, Chao;Chen, Jian-Feng
具有高可见光透过率的无机-有机纳米材料显示出巨大的应用潜力。然而，纳米颗粒难以均匀地分散在有机基质中，导致透明度明显下降。报道了一种制备高透明、性能优异的氧化锌-聚甲基丙烯酸甲酯（ZnO-PMMA）纳米复合材料的方法。首先，通过超重力反应沉淀法合成了ZnO在甲基丙烯酸甲酯（MMA）单体中的高度透明的纳米分散体。然后，采用原位本体聚合法制备了ZnO-PMMA纳米复合材料。ZnO纳米粒子粒径约为6 nm，粒径分布窄，单分散在MMA中，表面改性剂含有C=C双键，有助于ZnO纳米粒子在PMMA基体中的均匀分散。因此，这确保了所制备的ZnO-PMMA纳米复合材料保持高的可见光透射率而没有任何瑞利散射。此外，ZnO纳米粒子的良好分散性使ZnO-PMMA纳米复合材料具有良好的热稳定性、高韧性和高刚度，实现了紫外屏蔽和抗光老化等多功能应用。纯PMMA经紫外光照射200 h后，颜色明显变黄，力学性能明显下降，而纳米复合材料无色透明，仍保持较高的可见光透过率和力学性能，在光学材料和光学设备领域具有很大的应用潜力。
The inorganic-organic nanomaterials with high visible light transmittance have shown great potential in applications. However, it is difficult to disperse nanoparticles uniformly in organic matrices, resulting in an obvious decrease in transparency. This article reports a method to prepare ZnO-poly(methyl methacrylate) (ZnO-PMMA) nanocomposites with high transparency and excellent properties. First, a highly transparent nanodispersion of ZnO in methyl methacrylate (MMA) monomer is synthesized by the high-gravity reactive precipitation method. Then, ZnO-PMMA nanocomposites are prepared by the in situ bulk polymerization method. ZnO nanoparticles are about 6 nm with narrow size distribution, which monodisperse in MMA with the surface modifier containing C=C double bonds, contributing to the uniform dispersion of ZnO nanoparticles in PMMA matrices. Therefore, it ensures that the prepared ZnO-PMMA nanocomposites keep a high visible transmittance without any Rayleigh scatter. Moreover, ZnO-PMMA nanocomposites achieve multiple function applications of UV-shielding and anti-photo-aging, due to good thermal stability and high toughness and stiffness, which is attributed to the good dispersion of ZnO nanoparticles. After 200 h of UV radiation, pure PMMA obviously turns yellow and has a remarkable decrease in mechanical properties, whereas the nanocomposite is colorless and still keeps high visible transmittance and mechanical performances, which has great potential applications in the fields of optical materials and equipment.