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以醋酸镍为原料采用改进的溶胶-凝胶法制备了PEG6000/纳米Ni(OH)2复合溶胶,粘度法确定了溶胶的稳定区域,稳定溶胶有两种流型:牛顿体和假塑体.以稳定溶胶牛顿体配方采用旋涂法制备了纳米NiO薄膜.研究表明,在旋转涂膜过程中旋转角速度(ω)、旋涂液表观粘度(η)、纳米Ni(OH)2含量(M)是影响薄膜厚度(d)的主要因素,符合关系式:d=K .溶胶的流变型影响薄膜质量:以牛顿体制备的薄膜表面较平整,而以假塑体制备的薄膜表面起伏不平. Ni(OH)2和PEG6000的相对含量主要影响薄膜表面孔隙度,Ni(OH)2含量低而PEG6000含量高,则薄膜表面纳米NiO粒子排列较为稀疏,反之则排列较为紧密.多次涂膜可得均匀致密的薄膜.
The PEG6000 / nano Ni (OH) 2 composite sol was prepared by the improved sol-gel method using nickel acetate as raw material. The stability of the sol was determined by the viscosity method. There are two flow states of the stabilized sol: Newtonian and pseudoplastic. Nanostructured NiO thin films were prepared by spin-coating method in order to stabilize the sol-gel Newton formula.The results show that the rotational angular velocity (ω), apparent viscosity (η), nano Ni (OH) 2 content ) Is the major factor influencing the film thickness (d), which is in accordance with the relation: d = K. The rheology of the sol affects the film quality: the films prepared in Newtons have a flatter surface and the films made with the pics have irregular surfaces. The relative content of Ni (OH) 2 and PEG6000 mainly affects the surface porosity of the film, while the content of Ni (OH) 2 is low and the content of PEG6000 is high, the arrangement of nano NiO particles on the film surface is rather sparse, A uniform and dense film.