CIESC Journal ›› 2019, Vol. 70 ›› Issue (S2): 363-368.DOI: 10.11949/0438-1157.20190497

• Material science and engineering, nanotechnology • Previous Articles     Next Articles

Study on modification of glass wool/SiO2 aerogel combined board

Qiuhui YAN1(),Xiaoyang SUN1,Jieren LUO2,Zhiju WU1   

  1. 1. School of Building Services Science and Engineering,Xi’an University of Architecture and Technology, Xi’an 710055, Shaanxi, China
    2. Institute of Urban Planning and Municipal Engineering, Xi’an Polytechnic University, Xi’an 710048, Shaanxi, China
  • Received:2019-05-13 Revised:2019-07-10 Online:2019-09-06 Published:2019-09-06
  • Contact: Qiuhui YAN

玻璃棉/SiO2气凝胶复合板的改性研究

闫秋会1(),孙晓阳1,罗杰任2,吴志菊1   

  1. 1. 西安建筑科技大学建筑设备科学与工程学院,陕西 西安710055
    2. 西安工程大学城市规划与市政工程学院,陕西 西安 710048
  • 通讯作者: 闫秋会
  • 作者简介:闫秋会(1965—),女,博士,教授, yanqiuhui@xauat.edu.cn
  • 基金资助:
    陕西省科技厅重点研发计划项目(2018SF-355);动力工程多相流国家重点实验室开放基金项目;西安市碑林区科技计划项目(GX1804)

Abstract:

The modified solution of SiO2 aerogel was prepared by selecting anhydrous ethanol as solvent and SiO2 aerogel as solute and was used to improve the thermal insulation performance of glass wool. Glass wool/SiO2 aerogel combined boards were prepared by infiltration and prevailing pressure drying. The influence of the mass fraction of SiO2 aerogel and the infiltration time on its performance was studied, and compared with the glass wool/SiO2 aerogel combined board prepared by sol-gel method. The results show that the mass fraction of SiO2 aerogel and infiltration time have significant influence on the properties of glass wool/SiO2 aerogel combined board. When the mass fraction of SiO2 aerogel reached 8% and the infiltration time was 20 min,the short-term water absorption and thermal conductivity of glass wool/SiO2 aerogel combined board decreased by 38.09% and 18.32% respectively, and the compressive strength increased by 102.89%. Compared with sol-gel method, this method has the advantages of shorter preparation cycle, simpler process and lower cost, and is more suitable for large-scale production.

Key words: silica aerogel, glass wool/SiO2 aerogel combined board, thermal conductivity, building energy consumption, composites, solution

摘要:

通过选取无水乙醇为溶剂,以SiO2气凝胶为溶质,制备SiO2气凝胶改性溶液,并将其应用于改善玻璃棉的保温性能。通过浸润及常压干燥的方法制取玻璃棉/SiO2气凝胶复合板,研究SiO2气凝胶的质量分数和浸润时间对其性能的影响,并与溶胶-凝胶法制备的玻璃棉/SiO2气凝胶复合板相比。研究表明SiO2气凝胶的质量分数和浸润时间对玻璃棉/SiO2气凝胶复合板的性能有显著影响。当SiO2气凝胶质量分数达到8%且浸润时间为20 min时,玻璃棉/SiO2气凝胶复合板的短期吸水率、热导率分别下降了38.09%、18.32%,抗压强度上升了102.89%。与溶胶-凝胶法相比,本方法具有制备周期短、工艺较为简洁、成本低等优点,更适宜于大规模生产应用。

关键词: SiO2气凝胶, 玻璃棉/SiO2气凝胶复合板, 热导率, 建筑能耗, 复合材料, 溶液

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