GTO/PMMA复合材料的制备及其透明隔热性能的研究

Preparation of GTO/PMMA Composites and Their Transparent Thermal Insulation Properties

为了减少太阳热辐射对人体的损害已经消耗了地球的大量资源,目前研究更加新型的环保热屏蔽材料势在必行。采用正交试验法研究了溶剂载体种类、分散剂类型、改性时间及球磨时间对铯钨青铜(GTO)在甲基丙烯酸甲酯(MMA)中分散稳定性的影响。进一步研究了不同比例GTO/PMMA复合材料对隔热效果的影响并分析了其隔热机理。采用扫描电镜(SEM)、紫外-可见-近红外分光光度计对样品的微观形貌及近红外吸收性能进行了表征,通过自制隔热装置对其隔热性能进行了评价。实验结果表明:溶剂载体选用对苯二甲酸二辛酯(DOTP)为最优,在分散剂KENT-1103作用下,球磨时间24 h、振荡分散时间为24 h的稳定性最好;结合SEM和透射光谱分析,PMMA-GTO复合材料的相容性好,PMMA-0.4 wt%GTO的样品可见光透过率为39.96%,近红外光阻隔率96.91%,雾度为8.92%,隔热温度10.1℃,综合性能最好。

In order to reduce the damage of solar thermal radiation to the human body,a large amount of the Earth′s resources have been consumed.Currently,it is imperative to research novel environmentally friendly thermal shielding materials.The study uses orthogonal experimental method to study the effects of solvent carrier type,dispersant type,modification time,and ball milling time on the dispersion stability of cesium tungsten bronze(GTO)in methyl methacrylate(MMA).Further research was conducted on the influence of different ratios of GTO/PMMA composite materials on the thermal insulation effect,and their thermal insulation mechanism was analyzed.The microscopic morphology and near-infrared absorption performance of the samples were characterized by scanning electron microscope(SEM)and ultraviolet-visible light-near-infrared spectrophotometer,and the thermal insulation performance was evaluated by a self-made thermal insulation device.The experimental results show that the optimal solvent carrier is DOTP.Under the action of dispersant KENT-1103,the best stability is achieved with a ball milling time of 24 hours and an oscillation dispersion time of 24 hours.With SEM and transmission spectroscopy analysis,the PMMA-GTO composite material has good compatibility;the sample with PMMA-0.4 wt%GTO has a visible light transmittance of 39.96%,a near-infrared light barrier of 96.91%,a haze of 8.92%,and an insulation temperature of 10.1℃,showing the best overall performance.