Preparation of resorcinol-formaldehyde enhanced silica aerogels and their absorption properties

YE Xinli; ZHANG Haiyang; MA Xiaomin; MAO Bangxiao; ZHANG Junxiong

doi:10.13801/j.cnki.fhclxb.20230928.001

Volume 41 Issue 4

Apr. 2024

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YE Xinli, ZHANG Haiyang, MA Xiaomin, et al. Preparation of resorcinol-formaldehyde enhanced silica aerogels and their absorption properties[J]. Acta Materiae Compositae Sinica, 2024, 41(4): 1890-1899. doi: 10.13801/j.cnki.fhclxb.20230928.001

Citation:

YE Xinli, ZHANG Haiyang, MA Xiaomin, et al. Preparation of resorcinol-formaldehyde enhanced silica aerogels and their absorption properties[J]. Acta Materiae Compositae Sinica, 2024, 41(4): 1890-1899. doi: 10.13801/j.cnki.fhclxb.20230928.001

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Preparation of resorcinol-formaldehyde enhanced silica aerogels and their absorption properties

doi: 10.13801/j.cnki.fhclxb.20230928.001

1.
School of Civil Aviation, Northwestern Polytechnical University, Xi'an 710072, China
2.
Research & Development Institute of Northwestern Polytechnical University in Shenzhen, Shenzhen 518063, China
3.
National Equipment New Material & Technology (Jiangsu) CO., LTD., Suzhou 215400, China
4.
Beijing Xinfeng Aerospace Equipment CO., LTD., Beijing 100854, China
5.
School of Textile and Clothing, Nantong University, Nantong 226019, China

Funds: Fundamental Research Funds for the Central Universities (D5000210522); Natural Science Foundation of Shaanxi Province (2022JQ-482); Guangdong Basic and Applied Basic Research Foundation (2021A1515111155); China Postdoctoral Science Foundation (2021M702665)

Received Date: 2023-06-19
Accepted Date: 2023-09-09
Rev Recd Date: 2023-09-03

Available Online: 2023-09-28

Publish Date: 2024-04-15

Abstract

Abstract

A composite material of resorcinol-formaldehyde (RF) enhanced silica dioxide aerogel (RF/SiO₂) had been successfully synthesized by introducing RF to build a porous framework through the sol-gel technique, followed by ambient pressure drying to explore the possibility of the application of silica dioxide aerogel in electromagnetic microwave absorption. The RF/SiO₂ aerogel was then subjected to heat treatment, and its microstructure and physicochemical properties after heat treatment were characterized using SEM, XRD, and other methods. The influence of heat treatment temperature on the microwave absorption performance of RF/SiO₂ aerogel was investigated. The results show that the microwave absorption performance of RF/SiO₂ aerogel is significantly improved with increasing heat treatment temperature. At a heat treatment temperature of 1500℃, the RF/SiO₂ aerogel exhibits a minimum reflection loss of −48.42 dB at a thickness of 4.05 mm. At a thickness of 3.45 mm, the effective absorption bandwidth reaches 2.06 GHz, demonstrating excellent electromagnetic wave absorption performance. This study provides guidance for the preparation of high-performance microwave-absorbing materials.
- RF/SiO₂ aerogel,
- sol-gel method,
- microstructure,
- heat treatment,
- absorbing performance
Long Abstrsct
Innovation Points

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References(26)

References

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