Study on the Effect of Solvent Polarity on the Microstructure of Phenolic Aerogel

ZHANG Shi-zhong; HE Li-juan; KONG De-li; LIU Yuan-yuan; WANG Meng; LIU Tao; ZHANG Wan-lin; HUANG Hong-yan; LI Wen-jing

doi:10.14028/j.cnki.1003-3726.2024.24.170

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Study on the Effect of Solvent Polarity on the Microstructure of Phenolic Aerogel

更新时间：2024-11-20

- Study on the Effect of Solvent Polarity on the Microstructure of Phenolic Aerogel
- Polymer Bulletin Vol. 37, Issue 11, Pages: 1620-1627(2024)
- 作者机构：
  
  1.航天特种材料及工艺技术研究所，北京 100074
  2.火箭军装备部驻北京地区第六军事代表室，北京 100000
- 作者简介：
- 基金信息：
- DOI：10.14028/j.cnki.1003-3726.2024.24.170
  CLC：
- Published：20 November 2024，
  
  Published Online：21 August 2024，
  
  Received：06 June 2024，
  
  Accepted：18 July 2024
- 稿件说明：
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张世忠, 贺丽娟, 孔得力, 刘圆圆, 王孟, 刘韬, 张晚林, 黄红岩, 李文静. 反应溶剂极性对酚醛气凝胶微观结构的影响研究. 高分子通报, 2024, 37(11), 1620–1627

Zhang, S. Z.; He, L. J.; Kong, D. L.; Liu, Y. Y.; Wang, M.; Liu, T.; Zhang, W. L.; Huang, H. Y.; Li, W. J. Study on the effect of solvent polarity on the microstructure of phenolic aerogel. Polym. Bull. (in Chinese), 2024, 37(11), 1620–1627
张世忠, 贺丽娟, 孔得力, 刘圆圆, 王孟, 刘韬, 张晚林, 黄红岩, 李文静. 反应溶剂极性对酚醛气凝胶微观结构的影响研究. 高分子通报, 2024, 37(11), 1620–1627 DOI： 10.14028/j.cnki.1003-3726.2024.24.170.

Zhang, S. Z.; He, L. J.; Kong, D. L.; Liu, Y. Y.; Wang, M.; Liu, T.; Zhang, W. L.; Huang, H. Y.; Li, W. J. Study on the effect of solvent polarity on the microstructure of phenolic aerogel. Polym. Bull. (in Chinese), 2024, 37(11), 1620–1627 DOI： 10.14028/j.cnki.1003-3726.2024.24.170.

摘要

酚醛气凝胶形成的关键之一在于溶液的聚合诱导相分离反应过程中溶胶凝胶的转变，反应溶剂极性对溶胶凝胶转变具有重要影响。为研究反应溶剂极性对酚醛溶胶凝胶过程及其气凝胶结构的影响，选取正戊醇、乙醇和乙二醇三种不同极性的醇类溶剂作为反应溶剂，采用常压干燥和超临界干燥两种方式，制备出不同孔结构的酚醛气凝胶，通过扫描电镜等详细研究了气凝胶结构。结果表明，以正戊醇为反应溶剂制备的酚醛湿凝胶，不受干燥方式的影响，可以得到理化性质和孔结构稳定的酚醛气凝胶，高温热解以后的碳气凝胶仍不受前期干燥方式的影响。本工作通过对比研究不同极性反应溶剂和干燥方式制备的酚醛气凝胶，明确了在正戊醇溶剂中酚醛可以有效进行溶胶凝胶过程，得到颗粒堆积紧密、骨架稳定的多孔结构，避免了后期干燥方式对酚醛气凝胶理化性质和孔结构的影响。这些结果为酚醛气凝胶的规模化生产和实际应用提供了技术支撑。

Abstract

One of the key factors in the formation of phenolic aerogel is the sol-gel transition during the phase separation reaction induced by solution polymerization. In order to study the effect of solvent polarity on the sol-gel process and aerogel structure of phenolic resin

the phenolic aerogel with different pore structures was prepared by using ambient drying and supercritical drying. The aerogel structure was characterized by scanning electron microscopy (SEM) and so on. The results showed that the phenolic aerogel prepared with N-pentanol as the reaction solvent was not affected by the drying method

and the phenolic aerogel with stable physicochemical properties and pore structure could be obtained. The carbon aerogel after high temperature pyrolysis was still not affected by the previous drying method. In this work

by comparing the phenolic aerogel prepared by different polar reaction solvents and drying methods

it is clear that phenolic can effectively undergo the sol-gel process in N-pentanol solvent

and obtain a porous structure with tight particle packing and stable skeleton

avoiding the influence of late drying methods on the physicochemical properties and pore structure of phenolic aerogel. These results provide technical support for the large-scale production and practical application of phenolic aerogel.

关键词

酚醛气凝胶溶剂效应溶胶凝胶常压干燥超临界干燥

Keywords

Phenolic aerogelSolvent effectSol-gelAmbient dryingSupercritical drying

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范佳敏, 秦岩, 傅华东, 薛宸沂, 常凯. 有机硅改性酚醛气凝胶的制备及隔热疏水性能. 高分子材料科学与工程, 2022, 38(8), 113-121.

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