Polyisobutylene-block-Poly(ethylene oxide) for Robust Templating of Highly Ordered Mesoporous Materials

2005 ◽  
Vol 17 (9) ◽  
pp. 1158-1162 ◽  
Author(s):  
M. Groenewolt ◽  
T. Brezesinski ◽  
H. Schlaad ◽  
M. Antonietti ◽  
P. W. Groh ◽  
...  
Keyword(s):  
Ethylene Oxide ◽  
Mesoporous Materials ◽  
Ordered Mesoporous Materials ◽  
Ordered Mesoporous ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

Crystallization ability of poly(lactic acid) block segments in templating poly(ethylene oxide-b-lactic acid) diblock copolymers affects the resulting structures of mesoporous silicas

RSC Advances ◽  
2015 ◽  
Vol 5 (29) ◽  
pp. 22625-22637 ◽  
Author(s):  
Oleksii Altukhov ◽  
Shiao-Wei Kuo
Keyword(s):  
Lactic Acid ◽  
Ethylene Oxide ◽  
Diblock Copolymers ◽  
Mesoporous Silicas ◽  
Poly Lactic Acid ◽  
Ordered Mesoporous Materials ◽  
Crystallization Ability ◽  
Ordered Mesoporous ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

Eliminating the crystallization ability of PLLA to amorphous PLA block segment allowed us to obtain long-range-ordered mesoporous materials.

Solvent-tuning of ordered mesoporous silicas prepared through evaporation-induced self-assembly templated by poly(ethylene oxide-b-ε-caprolactone)

RSC Advances ◽  
2014 ◽  
Vol 4 (105) ◽  
pp. 61012-61021 ◽  
Author(s):  
Wei-Cheng Chu ◽  
Chen-Xin Lin ◽  
Shiao-Wei Kuo
Keyword(s):  
Ethylene Oxide ◽  
Self Assembly ◽  
Mesoporous Silicas ◽  
Size Distributions ◽  
Ordered Mesoporous ◽  
Pore Size Distributions ◽  
Evaporation Induced Self Assembly ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene ◽  
Selection Of

Highly ordered mesoporous silicas having narrow pore size distributions and various morphologies merely through selection of an appropriate solvent.

scholarly journals pH-mediated control over the mesostructure of ordered mesoporous materials templated by polyion complex micelles

2019 ◽  
Vol 10 ◽  
pp. 144-156 ◽  
Author(s):  
Emilie Molina ◽  
Mélody Mathonnat ◽  
Jason Richard ◽  
Patrick Lacroix-Desmazes ◽  
Martin In ◽  
...  
Keyword(s):  
Reaction Medium ◽  
Inorganic Materials ◽  
Materials Synthesis ◽  
Ordered Mesoporous Materials ◽  
Polyion Complex ◽  
Silica Source ◽  
Ordered Mesoporous ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene ◽  
Copolymer Poly

Ordered mesoporous silica materials were prepared under different pH conditions by using a silicon alkoxide as a silica source and polyion complex (PIC) micelles as the structure-directing agents. PIC micelles were formed by complexation between a weak polyacid-containing double-hydrophilic block copolymer, poly(ethylene oxide)-b-poly(acrylic acid) (PEO-b-PAA), and a weak polybase, oligochitosan-type polyamine. As both the micellization process and the rate of silica condensation are highly dependent on pH, the properties of silica mesostructures can be modulated by changing the pH of the reaction medium. Varying the materials synthesis pH from 4.5 to 7.9 led to 2D-hexagonal, wormlike or lamellar mesostructures, with a varying degree of order. The chemical composition of the as-synthesized hybrid organic/inorganic materials was also found to vary with pH. The structure variations were discussed based on the extent of electrostatic complexing bonds between acrylate and amino functions and on the silica condensation rate as a function of pH.

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