Step-freeze-drying method for carbon aerogels: a study of the effects on microstructure and mechanical property

被引：40

作者：

Hu, Lei ^{[1
,2
]}

He, Rujie ^{[1
,2
]}

Lu, Zhang ^{[1
,2
]}

Zhang, Keqiang ^{[1
,2
]}

Bai, Xuejian ^{[1
,2
]}

机构：

[1] Beijing Inst Technol, Inst Adv Struct Technol, Beijing 100081, Peoples R China

[2] Beijing Inst Technol, Beijing Key Lab Lightweight Multifunct Composite, Beijing 100081, Peoples R China

来源：

RSC ADVANCES | 2019年 / 9卷 / 18期

基金：

中国国家自然科学基金; 北京市自然科学基金;

关键词：

THERMAL-CONDUCTIVITY; RESORCINOL; POLYCONDENSATION; MESOPOROSITY; ELECTRODES; GELS;

D O I：

10.1039/c9ra01328h

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

In this paper, a novel step-freeze-drying method was used to prepare carbon aerogels. The effects of step-freeze-drying on the density, linear shrinkage, specific surface area, pore size distribution, microstructure and compressive strength of carbon aerogels were investigated, and compared to traditional freeze-drying methods. It was found that the step-freeze-drying method reduced the density, linear shrinkage and pore size of carbon aerogels compared to traditional freeze-drying. And it also improved the specific surface area, the microstructural homogenization and the compressive strength of carbon aerogels compared to traditional freeze-drying. It is therefore believed that step-freeze-drying is an efficient method to obtain carbon aerogels with fine microstructure and high mechanical property.

引用

页码：9931 / 9936

页数：6

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