纤维-空气凝复合材料的辐射传热特性用于隔热
Mohanapriya Venkataraman1, Sebnem Sözcü1, Jiří Militký1
1Department of Material Engineering, Faculty of Textile Engineering, Technical University of Liberec, Studentská 1402/2, 46117 Liberec, Czech Republic.
Gels (Basel, Switzerland)
|July 25, 2025
概括
纤维-气凝复合材料通过抑制热传递,提供优质的绝热. 添加纤维增强机械强度,减少热损失,使它们成为高温应用的理想选择.
科学领域:
- 材料科学 材料科学 材料科学
- 热力工程是热力工程中的一个.
- 纳米技术纳米技术
背景情况:
- 纤维-气凝复合材料是具有微观结构的先进热绝缘体,可以最大限度地减少导电,对流和辐射热传递.
- 气凝在室温下具有超低的导热性,但在高温 (>300°C) 时会出现脆性和高红外透明度.
- 结合微量纤维可以提高机械强度,并通过增强的散射和吸收减少辐射热传递.
研究的目的:
- 审查纤维-气凝复合材料中辐射热传递的基本机制.
- 讨论纤维增强气凝的最新进展,包括材料选择,结构修改和传热模型.
- 探索优化这些复合材料用于高温应用的方法.
主要方法:
- 对控制辐射传热的吸收,散射和灭绝系数的分析.
- 检查分析和实验技术,如里埃变换红外光谱 (FTIR) 和数值建模.
- 使用FTIR光谱测量发射率和发射率.
主要成果:
- 纤维的结合提高了机械强度,并降低了高达30%的导热率,低纤维体积分数 (10%).
- 由于红外散射增加,添加玻璃纤维减少了约40%的辐射热传输.
- FTIR光谱学证实,纤维强化在高温下降低了约15%的辐射率.
结论:
- 纤维-气凝复合材料显示出用于高温隔热的巨大潜力.
- 需要进行进一步的研究,以提高节能建筑,电子和航空航天领域的工业应用的可负担性和可扩展性.
- 优化材料选择和结构设计是长期热稳定性和性能的关键.
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