华南理工大学学报(自然科学版) ›› 2007, Vol. 35 ›› Issue (5): 113-116,131.

• 化学化工 • 上一篇    下一篇

新型多孔保温材料的制备及性能

高学农 王端阳 黄活阳 方玉堂   

  1. 华南理工大学 传热强化与过程节能教育部重点实验室,广东 广州 510640
  • 收稿日期:2006-06-22 出版日期:2007-05-25 发布日期:2007-05-25
  • 通信作者: 高学农(1969-),男,博士,副教授,主要从事制冷与空调、能源材料、保温节能方面的研究. E-mail:cexngao@scut.edu.cn
  • 作者简介:高学农(1969-),男,博士,副教授,主要从事制冷与空调、能源材料、保温节能方面的研究.
  • 基金资助:

    国家自然科学基金资助项目(50106003 )

Preparation and Properties of New-Type Porous Thermal Insulation Material

Gao Xue-nong  Wang Duan-yang  Huang Huo-yang  Fang Yu-tang   

  1. Key Laboratory of Enhanced Heat Transfer and Energy Conservation of the Ministry ofEducation , South China Univ. of Tech. , Guangzhou 510640 , Guangdong , China
  • Received:2006-06-22 Online:2007-05-25 Published:2007-05-25
  • Contact: 高学农(1969-),男,博士,副教授,主要从事制冷与空调、能源材料、保温节能方面的研究. E-mail:cexngao@scut.edu.cn
  • About author:高学农(1969-),男,博士,副教授,主要从事制冷与空调、能源材料、保温节能方面的研究.
  • Supported by:

    国家自然科学基金资助项目(50106003 )

摘要: 基于微尺度传热传质机理,以膨胀珍珠岩为骨料,水玻璃为粘接剂,煅烧高岭土、破酸钙、锂基膨润土等为添加剂,通过微波加热膨化,制备了一种硬质多孔保温材料,研究了加热膨化方式对所制备的保温材料性能的影响,并探讨了不同原料组成时导热系数的变化规律.结果表明,膨胀珍珠岩/水玻璃/锂基膨润土/煅烧高岭土/CaCO3 的最佳质量配比为46: 36: 13: 3: 2 ,膨胀珍珠岩和水玻璃的含量是影响保温材料导热系数的主要因素,锂基膨润土、煅烧高岭土和碳酸钙等添加剂可有效地增强保温材料的机械强度和耐水性.

关键词: 保温材料, 制备, 性能, 微波加热, 导热系数

Abstract:

Based on the micro-scale heat and mass transfer mechanism , a new-type porous thermal insulating material was prepared hy means of microwave heating and expanding , with expanded perlite as the aggregate , sodium silicate as the adhesive , and calcined kaolin , CaCO3 and Li-hentonite as the additives. The effect of heating and expanding method on the performance of the prepared material was then analyzed , and the variation of thermal conductivity with component proportion was investigated. The results indicate that the optimal mass ratio of expanded perlite/ sodium silicate/Li -hentonite/ calcined kaolini CaCO3 is 46: 36: 13: 3: 2 , that the contents of expanded perlite and sodium silicate are two main factors influencing the thermal conductivity of the product , and that the additions of Li-hentonite , calcined kaolin and CaCO3 can effectively improve the mechanical strength and water resistance of the prepared porous thermal insulating material.

Key words: thermal insulating material, preparation, property, microwave heating, thermal conductivity