PET/MgCO_(3)/PEG日间被动辐射制冷膜的制备与性能  

Preparation and properties of a PET/MgCO_(3)/PEG film for passive daytime radiative cooling

作　　者：李晶晶[1] 杜雷雷 李仁宏[1] LI Jingjing;DU Leilei;LI Renhong(School of Materials Science&Engineering,Zhejiang Sci-Tech University,Hangzhou 310018,China)

机构地区：[1]浙江理工大学材料科学与工程学院,杭州310018

出　　处：《浙江理工大学学报(自然科学版)》2025年第2期157-165,共9页Journal of Zhejiang Sci-Tech University(Natural Sciences)

基　　金：国家自然科学基金项目(22172143)。

摘　　要：为了探究3D打印工艺对日间被动辐射制冷(Passive daytime radiative cooling, PDRC)材料性能的影响,以聚对苯二甲酸乙二醇酯(PET)为聚合物基质、碳酸镁(MgCO_(3))为红外发射填料、聚乙二醇(PEG)为致孔剂,制备了PET/MgCO_(3)/PEG(PMP)膜;并采用SEM、UV-VIS-NIR、FTIR等手段对PMP膜的形貌结构、光谱特性、PDRC性能、力学性能及自清洁性能进行了表征。结果表明:在PET中加入MgCO_(3)和PEG形成了微纳米级多孔结构,使材料在紫外可见近红外波段的平均反射率从11.84%提高到86.17%,中红外波段的发射率从88.66%提高到92.66%;与对照组相比,PMP膜实现了测试箱内约17.00℃的降温;PMP膜断裂强度为6 MPa,断裂伸长率为35%,水接触角为82.14°,户外暴露3个月后在紫外可见近红外波段的反射率仅下降约2%。该研究可为PDRC材料的制备方法提供理论依据。To investigate the influence of 3D printing technology on the performance of daytime passive radiative cooling(PDRC)materials,The article prepared a PET/MgCO_(3)/PEG(PMP)film using polyethylene terephthalate(PET)as the polymer matrix,magnesium carbonate(MgCO_(3))as the filler for infrared emission,and polyethylene glycol(PEG)as the pore-forming agent.The morphology,spectral characteristics,PDRC properties,mechanical properties and self-cleaning performance of the PMP film were characterized using such methods as SEM,UV-VIS-NIR,FTIR.The results showed that the addition of MgCO_(3) and PEG to PET formed a film with a graded porous structure,which increased the average reflectance from 11.84%to 86.17%in the ultraviolet-visible near-infrared range and improved the emissivity from 88.66%to 92.66%in the mid-infrared range.Compared with the blank control group,the PMP film achieved a cooling effect of approximately 17.00℃inside the test box.Additionally,the tensile strength and elongation at break of the PMP film were 6 MPa and 35%,respectively.The water contact angle was 82.14°,and after being exposed outdoors for three months,there was only about 2%decrease in reflectance in the ultraviolet-visible-near infrared wavelength range.The research findings provide theoretical basis for the preparation method of PDRC materials.

关 键 词：日间被动辐射制冷 3D打印 碳酸镁 聚乙二醇 多孔结构膜 

分 类 号：TS102.52[轻工技术与工程—纺织工程]