刚性聚氨泡生产技术对冷式吸水量的影响
Vladimir Yakushin1, Vanesa Dhalivala1, Laima Vevere1
1Latvian State Institute of Wood Chemistry, Dzerbenes Street 27, LV-1006 Riga, Latvia.
Polymers
|June 27, 2025
概括
较厚的喷雾应用的刚性聚氨 (PUR) 泡绝缘材料通过减少传热和吸收水分来显著改善冷性能. 表面状况也会影响液应用中的绝缘效率.
科学领域:
- 材料科学 材料科学 材料科学
- 冰冷基因工程 冰冷基因工程
背景情况:
- 有效的绝缘对于冷应用,如液态气体存储,至关重要.
- 聚氨 (PUR) 泡是一种常见的绝缘材料,但其在极端热梯度下的性能需要优化.
研究的目的:
- 调查生产技术和表面条件对冷环境中喷涂应用的刚性PUR泡绝缘材料性能的影响.
- 评估绝缘厚度和表面处理如何影响热传递和水分入.
主要方法:
- 使用液 (LN2) 的动态沸试验绝缘容器的实验测试.
- 评价泡的性能:粘附性,机械强度,热膨胀,导热性和封闭细胞含量.
- 与不同泡厚度和表面条件 (粗,加工光滑,尿素涂层) 的绝缘性能进行比较.
主要成果:
- 隔热厚度的增加导致有效导热率和吸水率的降低.
- 以尿素为基础的涂层减少了水的吸收,但增加了整体导热率.
- 湿度吸收集中在泡表面附近,在重复测试中没有观察到累积效应.
- 有效的导热率受到绝缘厚度,表面状况和环境湿度的影响.
结论:
- 绝缘厚度是提高PUR泡冷性能的主要因素.
- 表面处理可以减轻水分的入,但可能会影响导热性.
- 优化PUR泡绝缘用于冷应用需要仔细考虑厚度,表面表面和环境条件.
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