A pure aqueous route to mesoporous silica thin films via dip-coating of prefabricated hybrid micelles

被引:2
作者
Zschiedrich, Heiko [1 ,5 ]
Boissiere, Cedric [2 ,6 ]
Kooyman, Patricia J. [3 ,7 ]
Prouzet, Eric [4 ,8 ]
机构
[1] UMR 5635 CNRS ENSCM II, Inst Europ, Membranes, F-0534293 Montpellier, France
[2] UMR 7574 CNRS Univ, Laboratoire Chim MatiSre Condens, Pierre & Marie Curie, F-0575252 Paris, France
[3] Univ Cape Town, Dept Chem Engn, Rondebosch, South Africa
[4] Univ Waterloo, Univ W, Dept Chem, Waterloo, ON N2L 3G1, Canada
[5] CNRS, Inst Europeen Membranes, ENSCM UM 2, UMR 5635, 1919 Route Mende\, F-34293 Montpellier 5, France
[6] Univ Paris 06, CNRS, Lab Chim Matiere Condensee, UMR 7574, 4 Pl Jussieu, F-75252 Paris 5, France
[7] Univ Cape Town, Dept Chem Engn, Private Bag X3, ZA-7701 Rondebosch, South Africa
[8] Univ Waterloo, Dept Chem, 200 Univ Av West, Waterloo, ON N2L 3G1, Canada
基金
加拿大自然科学与工程研究理事会;
关键词
Thin film; Evaporation-induced self-assembly; Mesoporous; Ellipsoporosimetry; Dip-coating; Silica; POLYMER ELECTROLYTE; MSU; FUNDAMENTALS; MECHANISM;
D O I
10.1007/s10971-016-4221-y
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Mesoporous thin films were prepared by dip-coating with a purely aqueous method, as a substitute for the alcohol-based evaporation-induced self-assembly route. Unlike other aqueous routes that require a very slow pulling rate possible only using high performance dip-coaters, as a result of the high surface tension of water, this new process works with standard dip-coaters and at similar pulling rates as are used for the evaporation-induced self-assembly route. This unique asset is the result of the synthesis of prefabricated self-assembled silicate/organic hybrid micelles. These building blocks are concentrated before use, which provides a gelling edge after moderate evaporation. As a result, defect-free continuous mesoporous films with well-organized hexagonally packed pores were prepared after optimization of both the evaporation rate of the solution of hybrid micelles and the dip-coater pulling rate. The transmission electron microscopy observation reveals the hexagonally packed structure of mesoporous silica film. This nanostructure has already been observed on films prepared with the evaporation-induced self-assembly process, but it is the first time it is obtained with a pure aqueous method, based on prefabricated hybrid micelles, not on controlled evaporation of mesophases.
引用
收藏
页码:514 / 522
页数:9
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