Optimization of the contents of hollow glass microsphere and sodium hexametaphosphate for glass fiber vacuum insulation panel

2016 Global Conference on Polymer and Composite Materials

材料科学;化学

Li, C.D.^1,2,3 ; Chen, Z.F.^1,2,3 ; Zhou, J.M.^3

International Laboratory for Insulation and Energy Efficiency Materials, College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing

210016, China^1

Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Nanjing University of Aeronautics and Astronautics, Nanjing

210016, China^2

Suzhou V.I.P. New Material Co., Ltd, Hong da Fang Yuan Group, Suzhou

215400, China^3

关键词: Fiber suspensions;    Glass wool;    High quality;    Hollow glass microspheres;    Hybrid cores;    Pore diameters;    Sodium hexametaphosphate;    Vacuum insulation panel;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/137/1/012041/pdf
DOI  :  10.1088/1757-899X/137/1/012041

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

In this paper, various additive amounts of hollow glass microspheres (HGMs) and sodium hexametaphosphate (SHMP) powders were blended with flame attenuated glass wool (FAGW) to form hybrid core materials (HCMs) through the wet method. Among them, the SHMP was dissolved in the glass fiber suspension and coated on the surface of glass fibers while the HGMs were insoluble in the glass fiber suspension and filled in the fiber-fiber pores. The average pore diameter of the FAGW/HGM HCMs was 8-11 μm which was near the same as that of flame attenuated glass fiber mats (FAGMs, i.e., 10.5 μm). The tensile strength of the SHMP coated FAGMs was enhanced from 160 N/m to 370 N/m when SHMP content increased from 0 wt.% to 0.2 wt.%. By contrast, the tensile strength of the FAGW/HGM HCMs decreased from 160 N/m to 40 N/m when HGM content increased from 0 wt.% to 50 wt.%. Both the FAGW/HGM HCMs and SHMP coated FAGMs were vacuumed completely to form vacuum insulation panels (VIPs). The results showed that both the addition of SHMP and HGM led a slight increase in the thermal conductivity of the corresponding VIPs. To obtain a high-quality VIP, the optimal SHMP content and HGM content in glass fiber suspension was 0.12-0.2 wt.% and 0 wt.%.