通过超临界二氧化碳发泡制备具有良好自清洁功能的柔性超疏水热塑性聚氨酯多孔表面

IF 3.4 3区 工程技术 Q2 CHEMISTRY, PHYSICAL Journal of Supercritical Fluids Pub Date : 2024-04-26 DOI:10.1016/j.supflu.2024.106294
Shaowei Xing, Cuifang Lv, Meijiang Lin, Yao Wang, Fangfang Zou, Guangxian Li, Xia Liao
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引用次数: 0

摘要

多孔表面在超疏水应用方面具有巨大潜力。超临界二氧化碳发泡是一种制备多孔材料的绿色技术,但由于气体逸出会造成无孔表皮,因此很少用于制备多孔表面。本研究采用双层热塑性聚氨酯(TPU)薄片制备了具有致密孔隙和小孔隙间距的多孔热塑性聚氨酯(TPU)表面,以限制气体从表面逸出。研究了发泡压力和温度对 TPU 表面孔隙的影响。此外,还通过调节发泡过程获得了双模细胞,并研究了细胞结构对润湿性的影响。随后,通过在多孔热塑性聚氨酯表面改性氟化硅颗粒,成功制备了一种具有低水粘附性、机械稳定性和自清洁性能的柔性超疏水材料。
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A flexible superhydrophobic thermoplastic polyurethane porous surface with good self-cleaning function prepared by supercritical CO2 foaming

Porous surfaces show great potential for superhydrophobic applications. Supercritical CO2 foaming is a green technology for preparing porous materials, but it is rarely used to prepare porous surfaces due to the non-porous skin caused by the escape of gas. In this study, a porous thermoplastic polyurethane (TPU) surface with dense cell and small cell spacing is prepared by employing bilayer TPU sheet to restrict the escape of gas from surfaces. The influence of the foaming pressure and temperature on the cells of the TPU surface is researched. Furthermore, bimodal cells are obtained by regulating the foaming process and the effect of cell structure on wettability is investigated. Subsequently, a flexible superhydrophobic material with low water-adhesion, mechanical stability, and self-cleaning properties is successfully prepared by modifying fluorinated silica particles on porous TPU surfaces.

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来源期刊
Journal of Supercritical Fluids
Journal of Supercritical Fluids 工程技术-工程:化工
CiteScore
7.60
自引率
10.30%
发文量
236
审稿时长
56 days
期刊介绍: The Journal of Supercritical Fluids is an international journal devoted to the fundamental and applied aspects of supercritical fluids and processes. Its aim is to provide a focused platform for academic and industrial researchers to report their findings and to have ready access to the advances in this rapidly growing field. Its coverage is multidisciplinary and includes both basic and applied topics. Thermodynamics and phase equilibria, reaction kinetics and rate processes, thermal and transport properties, and all topics related to processing such as separations (extraction, fractionation, purification, chromatography) nucleation and impregnation are within the scope. Accounts of specific engineering applications such as those encountered in food, fuel, natural products, minerals, pharmaceuticals and polymer industries are included. Topics related to high pressure equipment design, analytical techniques, sensors, and process control methodologies are also within the scope of the journal.
期刊最新文献
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