作为冷冲击吸收器的相变材料在刚性聚氨冷绝缘泡中
Laima Vevere1, Beatrise Sture-Skela1, Vladimir Yakushin1
1Latvian State Institute of Wood Chemistry, Dzerbenes Str. 27, LV 1006 Riga, Latvia.
Polymers
|April 28, 2025
概括
将微封装相变材料 (PCM) 添加到刚性聚氨 (PU) 泡中,会略微增加密度并影响机械强度. 然而,导热性保持稳定,粘合强度提高,显示了增强泡功能的潜力.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物化学 聚合物化学
- 热力工程是热力工程中的一个.
背景情况:
- 刚性聚氨 (PU) 泡广泛用于绝缘和建筑.
- 换相材料 (PCM) 提供了在材料中增强热能存储的潜力.
- 将PCM整合到PU泡中,由于加工过程中的粘度变化,因此存在挑战.
研究的目的:
- 研究微封装PCM对刚性PU泡性能的影响.
- 为了评估密度,导热率,机械强度和粘合性质的变化.
- 了解PCM度对泡结构和性能的影响.
主要方法:
- 固的PU泡的制备,含有不同度的微封装PCM (5%和10%).
- 测量泡密度,导热能力,压力强度,拉伸强度和粘合强度.
- 使用差分扫描热量计 (DSC) 和动态机械分析 (DMA) 分析细胞结构和热性质.
主要成果:
- 在加工过程中粘度增加导致泡密度略微增加 (高达9%),PCM含量更高.
- 导热性保持稳定,保持了PU泡的封闭细胞结构.
- 由于细胞缺陷而增加PCM负荷,压力和拉力强度下降,但在5%PCM时,对的粘合强度有所改善.
- 结合PCM增加了玻璃过渡温度,并影响了整体的机械行为.
结论:
- 微封装PCM可以纳入刚性PU泡中,为改善热能存储提供了潜力.
- 仔细控制PCM度至关重要,以平衡增强功能与机械完整性的潜在妥协.
- 该研究强调了在PU泡中使用PCM时密度,机械性能和热性能之间的权衡.
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