Humidity Control Ability of Silica with Bimodal Pore Structures Prepared from Water Glass
Humidity Control Ability of Silica with Bimodal Pore Structures Prepared from Water Glass
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DOI：
10.2109/jcersj.112.491
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发表时间：
2004
影响因子：
1.1
通讯作者：
Y. Tomita;Ryōji Takahashi;S. Sato;T. Sodesawa;Makoto Otsuda
中科院分区：
文献类型：
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作者：
Y. Tomita;Ryōji Takahashi;S. Sato;T. Sodesawa;Makoto Otsuda
从平衡和动力学两方面研究了以水玻璃为原料，聚丙烯酸为催化剂制备的整体式双峰多孔硅胶的调湿性能。通过改变介孔的大小，系统地控制了水蒸气可逆吸附-释放的湿度。水的平衡吸附量高达0.7g/g二氧化硅。此外，大孔的存在使得通过吸附-释放循环对湿度变化的快速响应成为可能，因为气体在整体凝胶体中快速扩散。这些特点是相当有吸引力的材料湿度控制在密闭的建筑物。
Humidity control ability of monolithic bimodal porous silica gel prepared from water glass in the presence of poly (acrylic acid) was investigated from the viewpoints of both equilibrium and kinetic aspects. The humidity, at which adsorption-release of water vapor occurred reversibly, was systematically controlled by changing the mesopore size. The equilibrium adsorption amount of water was as high as 0.7 g per gram of silica. In addition, the presence of macropores made it possible to quickly response for humidity change by the adsorption-release cycle because of rapid gas diffusion in monolithic gel body. These features are quite attractive as a material for humidity control in the airtight buildings.