基于PVDF-HFP的膜层制备及辐射制冷性能研究  

Preparation and Radiation Cooling Performance of PVDF-HFP Films

作　　者：朱海 白明敏 李伟信 张一洋 谢军 ZHU Hai;BAI Mingmin;LI Weixin;ZHANG Yiyang;XIE Jun(School of Materials Science and Engineering,Jingdezhen Ceramic University,Jingdezhen 333403,Jiangxi,China;College of Humanities,Jingdezhen University,Jingdezhen 333032,Jiangxi,China)

机构地区：[1]景德镇陶瓷大学材料科学与工程学院,江西景德镇333403 [2]景德镇学院人文学院,江西景德镇333032

出　　处：《陶瓷学报》2025年第1期106-115,共10页Journal of Ceramics

基　　金：国家自然科学基金(52362003);景德镇市科技计划项目(20234ST003)。

摘　　要：辐射制冷是一种被动冷却方法,不消耗任何额外的能量。本工作提出了一种多孔网络结构的PVDF-HFP薄膜作为辐射制冷材料。采用相转化法制备了一种具有辐射制冷的高太阳反射率和高发射率光谱选择性的薄膜。系统地研究了溶剂丙酮的用量、反应温度、反应时间等参数对PVDF-HFP薄膜微观结构以及辐射性能的影响。并探讨辐射制冷薄膜在现实条件下的具体降温效果。测试结果表明,当PVDF-HFP粉末:丙酮:水的质量比为1∶11∶1,加热温度为65℃,加热搅拌时间为2.0 h时,形成了多孔网络结构,该结构提高了有机物薄膜对太阳光的散射和反射。制备的PVDF-HFP薄膜在大气窗口内具有80%(太阳全谱)的反射率,97%(红外波段)的红外发射率。在6月份景德镇(温带气候)的户外测试中,阳光下涂有PVDF-HFP薄膜的铝片温度最高低于环境温度14℃。[Background and purpose]With the advancement of society and the increase in population,the energy crisis is becoming increasingly severe.Cooling and refrigeration account for about 20%of the total electricity consumption in buildings worldwide and 10%of the global electricity consumption.Therefore,reducing the energy consumption of active cooling and exploring new cooling technologies have become important research topics.Radiative cooling is a passive cooling method that involves radiating heat in the form of infrared waves through the atmospheric window(primarily between 8 and 13μm)to outer space.This study was aimed to prepare PVDF-HFP(polyvinylidene fluoride-hexafluoropropylene)porous network structured film for radiative cooling.The goal is to achieve high solar reflectance and high infrared emissivity through spectral selectivity,thereby enhancing radiative cooling performance.[Methods]The main materials used are PVDF-HFP powder,acetone and deionized water.The PVDF-HFP powder was mixed with acetone and water in a specific ratio.The mixture was subjected to ultrasonic oscillation,heated and stirred to form a precursor solution.The solution was then coated onto an aluminum plate and dried at room temperature to form PVDF-HFP film.The effects of the content of acetone,reaction temperature and reaction time on microstructure and radiative performance of the PVDF-HFP film were systematically studied.Phase composition and microstructure of the film were characterized using X-ray diffraction(XRD)and scanning electron microscopy(SEM).Solar spectral reflectance and infrared emissivity of the film were tested.Outdoor radiative cooling tests were conducted to measure the temperature reduction effect of the film under outdoor conditions.[Results]The PVDF-HFP films were successfully fabricated using the phase inversion method,and the effects of various preparation parameters on the film's microstructure and radiative cooling performance were systematically investigated.The optimal preparation conditions were determined

关 键 词：PVDF-HFP薄膜 反射太阳光 多孔网络结构 辐射制冷。 

分 类 号：TQ174.75[化学工程—陶瓷工业]