耐高温微纳米纤维玻璃棉真空绝热材料结构设计及绝热机理研究

In order to increase the thermal insulation property and meet the insulation required in high temperature industry, building and cryogenic storage, a type of vacuum insulation material with micro/nano glass fiber core material and the method of preparation are proposed. Micro/nano glass fibers are prepared by centrifugal blowing and a model for glass fiber fining is built to explore the relation between the fiber diameter characteristic and target function range. Low thermal conductivity micro-nanometer fiber glass core material was designed by wet process and the effect of Zeta potential on the microstructure of core material are explored. Vacuum insulation panel with micro-nanometer fiber glass core material and stainless steel foil was prepared by the processes of laser welding and vacuum fusion welding. Heat transfer mechanism and prediction model of micro-nanometer fiber glass core material and vacuum insulation panel are studied. At last, making the thermal conductivity of vacuum insulation panel are 0.0012 W/(m • K) and 0.0033 W/(m • K) at the temperature of 240 oC and 400 oC, respectively. This research will provide theoretical and technical support for industrial and building insulation energy conservation on the high energy consumption turning into the ultra-low energy consumption.

为提高保温材料隔热性能，满足我国高温工业、建筑和深冷等领域高效节能需求。本项目提出耐高温微纳米纤维玻璃棉芯材真空绝热材料结构设计及其制备方法：采用高速离心喷吹法制备微纳米纤维玻璃棉，构建微纳米玻璃棉离心纤维化渐进耦合模型，建立纤维直径特性与目标函数值域的多重线性映射关系；采用湿法工艺设计低导热微纳米纤维玻璃棉芯材微观结构，研究Zeta电位对芯材微观组织结构形成机理；采用激光焊接协同真空熔焊封装方法制备微纳米纤维玻璃棉芯材/不锈钢箔真空绝热复合材料，研究微纳米纤维玻璃棉芯材以及真空绝热材料整体热量传递机制，构建耐高温真空绝热材料隔热性能预测模型，实现材料常温（24℃）导热系数达到0.0012W/(m•K)以下，高温（400℃）导热系数达到0.0033W/(m•K)以下，为我国工业和建筑保温节能领域实现由高能耗向超低能耗跨越提供理论和技术支撑。

为提高保温材料隔热性能，满足我国高温工业领域高效节能需求。本项目采用高速离心喷吹法制备微纳米纤维玻璃棉，构建微纳米玻璃棉离心纤维化渐进耦合模型，建立纤维直径特性与目标函数值域的多重线性映射关系；采用湿法工艺设计低导热微纳米纤维玻璃棉芯材微观结构，研究Zeta电位对芯材微观组织结构形成机理；采用激光焊接协同真空熔焊封装方法制备微纳米纤维玻璃棉芯材/不锈钢箔真空绝热复合材料，研究微纳米纤维玻璃棉芯材以及真空绝热材料整体热量传递机制，构建耐高温真空绝热材料隔热性能预测模型，实现材料常温（24℃）导热系数达到0.0012W/(m•K)以下，高温（400℃）导热系数达到0.0033W/(m•K)以下，为我国工业和建筑保温节能领域实现由高能耗向超低能耗跨越提供理论和技术支撑。