{"title":"Fabrication of thermal insulation sodium alginate/SiO2 composite aerogel with superior radiative cooling function for firefighting clothing","authors":"Qing Jiang, Yuhang Wan, Xiaoqian Li, Xueru Qu, Shengnan Ouyang, Yi Qin, Zhenyu Zhu, Yushu Wang, Hualing He, Zhicai Yu","doi":"10.1108/prt-11-2023-0102","DOIUrl":null,"url":null,"abstract":"<h3>Purpose</h3>\n<p>This study aims to evaluate the thermal performance of sodium alginate (SA) aerogel attached to nano SiO<sub>2</sub> and its radiative cooling effect on firefighting clothing without environmental pollution.</p><!--/ Abstract__block -->\n<h3>Design/methodology/approach</h3>\n<p>SA/SiO<sub>2</sub> aerogel with refractory heat insulation and enhanced radiative cooling performance was fabricated by freeze-drying method, which can be used in firefighting clothing. The microstructure, chemical composition, thermal stability, and thermal emissivity were analyzed using Fourier transform infrared spectroscopy, scanning electron microscopy, thermogravimetric analyzer and infrared emissivity measurement instrument. The radiative cooling effect of aerogel was studied using thermal infrared imager and thermocouple.</p><!--/ Abstract__block -->\n<h3>Findings</h3>\n<p>When the addition of SiO<sub>2</sub> is 25% of SA, the prepared aerogel has excellent heat insulation and a high radiative cooling effect. Under a clear sky, the temperature of SA/SiO<sub>2</sub> aerogel is 9.4°C lower than that of pure SA aerogel and 22.1°C lower than that of the simulated environment. In addition, aerogel has more exceptional heat insulation effect than other common fabrics in the heat insulation performance test.</p><!--/ Abstract__block -->\n<h3>Research limitations/implications</h3>\n<p>SA/SiO<sub>2</sub> aerogel has passive radiative cooling function, which can efficaciously economize global energy, and it is paramount to environment-friendly cooling.</p><!--/ Abstract__block -->\n<h3>Practical implications</h3>\n<p>This method could pave the way for high-performance cooling materials designed for firefighting clothing to keep maintain the wearing comfort of firefighters.</p><!--/ Abstract__block -->\n<h3>Originality/value</h3>\n<p>SA/SiO<sub>2</sub> aerogel used in firefighting clothing can release heat to the low-temperature outer space in the form of thermal radiation to achieve its own cooling purpose, without additional energy supply.</p><!--/ Abstract__block -->\n<h3>Graphical abstract</h3>\n<p> </p><!--/ Abstract__block -->","PeriodicalId":20214,"journal":{"name":"Pigment & Resin Technology","volume":null,"pages":null},"PeriodicalIF":1.3000,"publicationDate":"2024-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Pigment & Resin Technology","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1108/prt-11-2023-0102","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, APPLIED","Score":null,"Total":0}
引用次数: 0
Abstract
Purpose
This study aims to evaluate the thermal performance of sodium alginate (SA) aerogel attached to nano SiO2 and its radiative cooling effect on firefighting clothing without environmental pollution.
Design/methodology/approach
SA/SiO2 aerogel with refractory heat insulation and enhanced radiative cooling performance was fabricated by freeze-drying method, which can be used in firefighting clothing. The microstructure, chemical composition, thermal stability, and thermal emissivity were analyzed using Fourier transform infrared spectroscopy, scanning electron microscopy, thermogravimetric analyzer and infrared emissivity measurement instrument. The radiative cooling effect of aerogel was studied using thermal infrared imager and thermocouple.
Findings
When the addition of SiO2 is 25% of SA, the prepared aerogel has excellent heat insulation and a high radiative cooling effect. Under a clear sky, the temperature of SA/SiO2 aerogel is 9.4°C lower than that of pure SA aerogel and 22.1°C lower than that of the simulated environment. In addition, aerogel has more exceptional heat insulation effect than other common fabrics in the heat insulation performance test.
Research limitations/implications
SA/SiO2 aerogel has passive radiative cooling function, which can efficaciously economize global energy, and it is paramount to environment-friendly cooling.
Practical implications
This method could pave the way for high-performance cooling materials designed for firefighting clothing to keep maintain the wearing comfort of firefighters.
Originality/value
SA/SiO2 aerogel used in firefighting clothing can release heat to the low-temperature outer space in the form of thermal radiation to achieve its own cooling purpose, without additional energy supply.
期刊介绍：
The journal looks at developments in: ■Adhesives and sealants ■Curing and coatings ■Wood coatings and preservatives ■Environmentally compliant coating systems and pigments ■Inks for food packaging ■Manufacturing machinery - reactors, mills mixing and dispersing equipment, pumps ■Packaging, labeling and storage ■Plus topical features and news on materials, coatings, industry people, conferences, books and so on ■Raw materials such as pigments, solvents, resins and chemicals ■Testing equipment and procedures
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