复合型透明隔热涂层制备及性能研究

Preparation and performance study of composite transparent thermal insulation coating

以聚偏氟乙烯(PVDF)为基底,添加氧化锡锑(ATO)、气凝胶和碳纤维制备双层复合型透明隔热涂层。通过X射线衍射(XRD)、扫描电镜(SEM)、紫外可见光近红外分光光度计(UV-VIS-NIR)和隔热测试装置等对复合涂层的形貌、微观结构和隔热机理进行研究,并测试其隔热性能和光学特性,包括吸收率、反射率、热导率和模拟光照测试。通过调整ATO、气凝胶和碳纤维各组分配比,探究其对复合涂层光学特性和隔热性能的影响规律,同时与传统单层隔热涂层进行比较。结果表明,所制得的涂层薄膜厚度约为30μm;在380~780 nm可见光的透过率在60%~70%;在模拟光照实验中,经过20 min模拟光照,该涂层最高可以降温9.6℃,较传统单层隔热涂层降温5.3℃。

Polyvinylidene fluoride(PVDF)was used as the substrate and different fillers were added to prepare a double-layer composite transparent thermal insulation coating,including tin oxide antimony(ATO),aerogel and carbon fiber.The morphology,microstructure and thermal insulation mechanism of composite coatings were studied by X-ray diffraction(XRD),scanning electron microscopy(SEM),ultraviolet-visible near-infrared spectrophotometer(UV-VIS-NIR)and thermal insulation test device,and their thermal insulation properties and optical properties were determined,including absorption,reflectivity,thermal conductivity and simulated light testing.By adjusting the composition ratios of ATO,aerogel and carbon fiber in the filler,its influence on the optical properties and thermal insulation performance of the composite coating was explored,and it was compared with the common thermal insulation coating on the market.The results show that the thickness of the prepared coated film is 30μm.The transmittance of visible light at 380~780 nm is between 60%and 70%.In the simulated light experiment,after 20 min of simulated light,the coating can be cooled by up to 9.6℃,which is 5.3℃lower than the traditional single layer heat insulation coating.