Hierarchical macroporosity induced by constrained syneresis in core-shell polysaccharide composites

被引：35

作者：

Di Renzo, F ^{[1
]}

Valentin, R ^{[1
]}

Boissière, M ^{[1
]}

Tourrette, A ^{[1
]}

Sparapano, G ^{[1
]}

Molvinger, K ^{[1
]}

Devoisselle, JM ^{[1
]}

Gérardin, C ^{[1
]}

Quignard, F ^{[1
]}

机构：

[1] ENSCM, CNRS,FR 1878, UMR 5618,Lab Mat Catalyt & Catalyse Chim Organ, UM1,Inst C Gerhardt, F-34296 Montpellier, France

来源：

CHEMISTRY OF MATERIALS | 2005年 / 17卷 / 18期

关键词：

D O I：

10.1021/cm0503477

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A radial pattern of macroscopic channels can be generated in core-shell polysaccharide microspheres during gel drying. The mechanical properties and the permeability of the outer crust can be tailored to control the formation of shafts in the organogel. The stiffness of the shell resists the shrinkage of the gel and causes channels to be opened in the direction in which the drying front advances. The permeability of the shell affects the effectiveness of supercritical drying and allows one to control the syneresis of the gel. Examples are provided from a chitosan-silica composite and from Cu-alginate gel beads with chemically modified outer crust.

引用

页码：4693 / 4699

页数：7

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