Highly ordered porous monolayer generation by dual-speed spin-coating with colloidal templates
Highly ordered porous monolayer generation by dual-speed spin-coating with colloidal templates
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DOI：
10.1016/j.cej.2010.11.077
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发表时间：
2011-02
影响因子：
15.1
通讯作者：
A. Nandiyanto;T. Ogi;Ferry Iskandar;K. Okuyama
中科院分区：
文献类型：
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作者：
A. Nandiyanto;T. Ogi;Ferry Iskandar;K. Okuyama
采用胶体模板双速旋涂法制备了有序多孔单分子膜。将5 nm二氧化硅(作为无机纳米粒子的模型)和410 nm的聚苯乙烯(PS)球(作为模板的模型)旋转涂覆在一起，制备出了二氧化硅/聚苯乙烯(PS)复合薄膜，这种方法简单、快速。然后进行热处理以去除PS，生成多孔膜。利用现有的旋涂方法，利用单速纺丝技术，不能获得具有高度有序的多孔结构的多孔单分子膜。孔的大小和形状(球形)与初始模板相同，为进一步开发(例如，控制孔大小)提供了一种潜在的方法。给出了孔道形成的理论解释和机理，对放大预测和评价具有重要意义。通过计算证实，由于孔道分配了自由空间，足够多的孔道使得能够制造出具有高孔隙率、超低密度和超低折射率的材料。
An ordered porous monolayer was successfully prepared using a dual-speed spin-coating with colloidal templates. The facile and rapid production was effective when a combination of 5-nm silica (as a model of an inorganic nanoparticle) and 410-nm polystyrene (PS) spheres (as a model of the template) were spin-coated to produce a composite silica/PS film. Heat treatment was then used to remove the PS, producing the porous film. The porous monolayer with a highly ordered porous structure could be obtained, which would not be realized using the current spin-coating methods that utilize single-spinning speed technique. The pore size and shape (spherical) were identical to the initial template, giving a potential way for further developments (e.g. control of pore size). The theoretical explanation and mechanism of porous formation were also added, which would be important for the scaling-up prediction and estimation. Sufficient numbers of pores made it possible to produce a material with a high porosity, an ultralow density, and an ultralow refractive index because the pores allocated free space, which was confirmed by calculation.