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

机译：碳气凝胶的逐步冷冻干燥方法：对微观结构和力学性能的影响研究

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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.
机译：本文采用一种新型的分步冷冻干燥法制备碳气凝胶。研究了逐步冷冻干燥对碳气凝胶的密度，线性收缩率，比表面积，孔径分布，微观结构和抗压强度的影响，并将其与传统的冷冻干燥方法进行了比较。已经发现，与传统的冷冻干燥相比，逐步冷冻干燥方法降低了碳气凝胶的密度，线性收缩率和孔径。与传统的冷冻干燥相比，它还改善了碳气凝胶的比表面积，微结构均质化和抗压强度。因此，据信，逐步冷冻干燥是获得具有优良的微观结构和高机械性能的碳气凝胶的有效方法。

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