Pore Size Control Mechanism of a Rigid Polyurethane Foam

IF 2.9 4区 工程技术 Q2 CHEMISTRY, MULTIDISCIPLINARY
Junsu Chae, Yoonki Lee, Siyoung Q. Choi
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引用次数: 0

Abstract

Rigid polyurethane foam is a widely used insulation material in various industrial fields. Enhancing its insulating performance often involves controlling pore size to reduce radiative conductivity and, in some cases, decrease gas thermal conductivity through the Knudsen effect. While numerous studies have addressed reducing the pore size of thermoplastic polymer foam to the nano-scale, limited research has focused on rigid polyurethane foam. Although some studies have shown that pore size changes with the addition of nucleating agents, a comprehensive understanding of the mechanisms governing pore size remains elusive. Therefore, this study investigates the factors determining the pore size of rigid polyurethane foam. Our findings confirm that the size of air bubbles formed during the blending of prepolymers has the most significant impact on pore size. Furthermore, we demonstrate that regulating the size of air bubbles before the urethane reaction allows for control over the final pore size. Experimental details substantiating these findings are presented.

Abstract Image

Abstract Image

硬质聚氨酯泡沫的孔径控制机制
硬质聚氨酯泡沫是一种广泛应用于各种工业领域的隔热材料。要提高其隔热性能,通常需要控制孔隙大小以降低辐射传导性,有时还需要通过克努森效应降低气体导热性。虽然许多研究都涉及将热塑性聚合物泡沫的孔径减小到纳米级,但针对硬质聚氨酯泡沫的研究却十分有限。虽然一些研究表明,孔径会随着成核剂的添加而发生变化,但对孔径的影响机理仍缺乏全面的了解。因此,本研究调查了决定硬质聚氨酯泡沫孔隙大小的因素。我们的研究结果证实,预聚物混合过程中形成的气泡大小对孔径的影响最大。此外,我们还证明,在聚氨酯反应之前调节气泡的大小可以控制最终的孔径。实验细节证实了这些发现。
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来源期刊
Korean Journal of Chemical Engineering
Korean Journal of Chemical Engineering 工程技术-工程:化工
CiteScore
4.60
自引率
11.10%
发文量
310
审稿时长
4.7 months
期刊介绍: The Korean Journal of Chemical Engineering provides a global forum for the dissemination of research in chemical engineering. The Journal publishes significant research results obtained in the Asia-Pacific region, and simultaneously introduces recent technical progress made in other areas of the world to this region. Submitted research papers must be of potential industrial significance and specifically concerned with chemical engineering. The editors will give preference to papers having a clearly stated practical scope and applicability in the areas of chemical engineering, and to those where new theoretical concepts are supported by new experimental details. The Journal also regularly publishes featured reviews on emerging and industrially important subjects of chemical engineering as well as selected papers presented at international conferences on the subjects.
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