Effects upon nitrogen sorption analysis in aerogels

被引：46

作者：

Reichenauer, G ^{[1
]}

Scherer, GW ^{[1
]}

机构：

[1] Princeton Univ, Dept Civil Engn & Environm Engn, CEE, PMI, Princeton, NJ 08544 USA

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2001年 / 236卷 / 02期

关键词：

nitrogen sorption; pore volume; pore size distribution; aerogel; compliant material; contraction; equilibration;

D O I：

10.1006/jcis.2000.7419

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：

Nitrogen sorption at 77 K is a standard technique for the characterization of mesoporosity, However, it seemed to be unable to detect the full, theoretically expected pore volume in high-porosity aerogels, Investigating this problem, we found that if only the sample is sufficiently equilibrated upon sorption, the full pore volume is detected regardless of its porosity. As insufficient equilibration also effects the pore size distribution deduced from the isotherm, highly erroneous results can be avoided if complete equilibration upon each sorption step is assured. For compliant aerogels the effect of sample deformation during analysis has to be taken into account. (C) 2001 Academic Press.

引用

页码：385 / 386

页数：2

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