Department of Microtechnology and Nanoscience, BioNano Systems Laboratory, Micro- and Nanosystems Group, Chalmers University of Technology, SE-412 96 Göteborg, Sweden.
J Colloid Interface Sci. 2012 Feb 1;367(1):485-93. doi: 10.1016/j.jcis.2011.10.030. Epub 2011 Oct 20.
CoCl(2) containing honeycomb patterned films were prepared from cellulose acetate (CA)/CoCl(2)/acetone solutions by the breath figure method in a wide range of humidities. Size and pore regularity depend on the CA/CoCl(2) molar ratio and humidity. When replacing CoCl(2) with Co(NO(3))(2) or CoBr(2), no formation of ordered porosity in the cellulose acetate films is observed. According to data from scanning electron microscopy (SEM), Energy Dispersive X-ray Microanalysis (EDX), X-ray Diffraction (XRD) and Fourier transform infrared (FTIR) spectroscopy, the key role in the formation of honeycomb structures can be attributed to the physical and chemical properties of CoCl(2) - hygroscopicity, low interaction with CA, and extraction from CA/CoCl(2)/acetone solution by water droplets condensed on the surface of the CA/CoCl(2) solution. Obtained films are prospective for using in catalysis, hydrogen fuel cells, and optical sensing materials.
CoCl(2) 包含蜂窝状图案的薄膜是通过在不同湿度下的呼吸图形法由醋酸纤维素 (CA)/CoCl(2)/丙酮溶液制备的。尺寸和孔的规则性取决于 CA/CoCl(2)的摩尔比和湿度。当用 Co(NO(3))(2)或 CoBr(2)代替 CoCl(2)时，在醋酸纤维素薄膜中没有观察到有序孔隙的形成。根据扫描电子显微镜 (SEM)、能量色散 X 射线微分析 (EDX)、X 射线衍射 (XRD) 和傅里叶变换红外 (FTIR) 光谱的数据，CoCl(2)在形成蜂窝结构中的关键作用可以归因于其物理和化学性质 - 吸湿性、与 CA 的低相互作用以及通过在 CA/CoCl(2)溶液表面凝结的水滴从 CA/CoCl(2)/丙酮溶液中提取。得到的薄膜有望用于催化、氢燃料电池和光学传感材料。
