Freezing-induced ordering of block copolymer micelles.

We demonstrate here the ordering of block copolymer micelles by ice templating, below 0 °C. We used this for the preparation of silica monoliths that present an ice-templated macroporosity, combined with a 2D hexagonal mesostructure templated by the addition of P123. We propose a mechanism triggered by the progressive freezing-induced concentration.

[1]  S. Deville.  Ice-templating, freeze casting: Beyond materials processing , 2013 .

[2]  C. L. Oliveira,et al.  Structure of micelles of a nonionic block copolymer determined by SANS and SAXS. , 2011, The journal of physical chemistry. B.

[3]  C. L. Oliveira,et al.  Kinetics of the formation of 2D-hexagonal silica nanostructured materials by nonionic block copolymer templating in solution. , 2011, The journal of physical chemistry. B.

[4]  K. Wilson,et al.  Hierarchical macroporous-mesoporous SBA-15 sulfonic acid catalysts for biodiesel synthesis. , 2010 .

[5]  S. Deville.  Freeze‐Casting of Porous Ceramics: A Review of Current Achievements and Issues , 2008, 1710.04201.

[6]  C. Laberty‐Robert,et al.  Design, Synthesis, and Properties of Inorganic and Hybrid Thin Films Having Periodically Organized Nanoporosity† , 2008 .

[7]  F. Fajula,et al.  MCM-41 silica monoliths with independent control of meso- and macroporosity , 2007 .

[8]  J. Halloran,et al.  Particle Redistribution During Dendritic Solidification of Particle Suspensions , 2006 .

[9]  H. Imai,et al.  Synthesis of mesoporous silica foams with hierarchical trimodal pore structures , 2003 .

[10]  G. G. Chernik.  Phase studies of surfactant–water systems , 1999 .

[11]  Yunfeng Lu,et al.  Evaporation-Induced Self-Assembly: Nanostructures Made Easy** , 1999 .

[12]  Fredrickson,et al.  Triblock copolymer syntheses of mesoporous silica with periodic 50 to 300 angstrom pores , 1998, Science.

[13]  C. Guizard,et al.  Synthesis conditions for hexagonal mesoporous silica layers , 2000 .

[14]  S. Bagshaw.  Morphosynthesis of macrocellular mesoporous silicate foams , 1999 .