挥发速率对胶体悬浮液干燥花样的影响  

Effect of evaporation rate on the drying pattern of colloidal suspension

作　　者：马文杰[1] 王育人[2] 

机构地区：[1]东北电力大学理学院,吉林吉林132012 [2]中国科学院力学研究所微重力室,北京100190

出　　处：《功能材料》2012年第14期1866-1868,共3页Journal of Functional Materials

基　　金：东北电力大学博士科研启动基金资助项目(BSJXM-200913)

摘　　要：研究了不同挥发速率下厚度较薄的凹液层胶体悬浮液的干燥花样。Panasonic照相机用于拍摄宏观干燥花样。结果表明,随着挥发速率的减小,马兰哥尼对流强度下降,胶体悬浮液的干燥花样更为平整均匀。在较低的挥发速率下可避免宽环花样形成,制备得到表面平整的薄膜,反射光谱证明其可作为三维光子晶体材料。We studyed the effect of evaporation rate on the drying pattern of thin concave layer colloidal suspension.Panasonic camera was used to capture macroscopic pattern.It is shown that with the decrease of evaporation rate,Marangoni convection strength descends,more uniformed drying pattern is obtained.Broad-ring pattern can be avoided and homogeneous film is prepared at lower evaporation rate,and reflection spectrum shows the film can be three-dimensional photonic crystal material.

关 键 词：胶体悬浮液 马兰哥尼 光子晶体 

分 类 号：O648.12[理学—物理化学]