以六水合硝酸锌和三乙醇胺为原料,采用微波水热法快速合成出形貌规则的ZnO纳米球。利用XRD、SEM、TEM等分析手段对样品进行表征。结果表明ZnO纳米球直径约150nm且单分散性良好;TEM分析显示ZnO纳米球是由10～20nm的晶粒堆积而成的疏松球形结构;在较大的水热温度和水热时间范围内,所得产物均为100～200nm的颗粒。将ZnO纳米粒子改性后掺入到纯丙乳液中形成复合乳液,其涂膜的抗张强度和断裂伸长率均有较大提高,涂膜浸泡48h后的吸水率也降低约10%。
Well monodispersed ZnO nanospheres have been prepared by using triethanolamine（TEA） as complexant and zinc nitrate hexahydrate as zinc source under microwave hydrothermal conditions.The structure and morphology of the samples were characterized by XRD,SEM and TEM.Results show that each ZnO nanospheres（about 150nm） is composed of numerous ZnO aggregates nanocrystallines with diameters of 10-20nm.Moreover,TEM observations indicate that the structure of ZnO nanospheres is loose.In the SEM images,the products obtained at different temperatures（140-180℃） and different times（1-60min） have the similar morphologies under the otherwise identical conditions.The composite latex was obtained by pure acrylic emulsion mixed with a small amount of modified ZnO nanoparticles.Water absorption ratio of composite films decrease by 10% after soaking 48h,in addition,both elongation at break and tensile strength of composite films significantly improve.
参考文献
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