STRUCTURE OF ORGANIC AEROGELS .1. MORPHOLOGY AND SCALING

被引：243

作者：

PEKALA, RW

SCHAEFER, DW

机构：

[1] LAWRENCE LIVERMORE NATL LAB,DEPT CHEM & MAT SCI,LIVERMORE,CA 94550

[2] SANDIA NATL LABS,DEPT MAT RES ENERGY & ENVIRONM TECHNOL,ALBUQUERQUE,NM 87185

来源：

MACROMOLECULES | 1993年 / 26卷 / 20期

关键词：

D O I：

10.1021/ma00072a029

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Small-angle X-ray scattering is used to determine the structure of nanoporous organic aerogels made by the base-catalyzed polymerization of resorcinol and formaldehyde. This study probes the effect of several variables on the morphology of the supercritically dried aerogels including catalyst concentration, monomer concentration, acid aging, and pyrolysis. In addition, the development of structure during polymerization and aging of the precursor aquagels is reported. The data are consistent with a smooth-surfaced morphology with no indication of fractal clusters or rough surfaces in the length-scale regime from 10 to 600 angstrom. These results, taken together, indicate that microphase separation is the dominant process underlying the morphology of these unique materials.

引用

页码：5487 / 5493

页数：7

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