| Synthesis and analysis of new humidity-controlling composite materials |
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| 作者姓名： | Jian-li Shang Zhi-fang Zong Hao Zhang |
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| 作者单位： | College of Materials and Mineral Resources, Xi'an University of Architecture and Technology, Xi'an 710055, China |
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| 基金项目： | This work was financially supported by the National Natural Science Foundation of China |
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| 摘 要： | Gypsum is a traditional building material. To improve the humidity-controlling properties of gypsum, we prepared a new type of humidity-controlling composite using the sol-gel method. Methods to determine the maximum equilibrium moisture content and speed of adsorption/desorption were subsequently applied to analyze the performance of the samples. The appearance and structural properties of the samples were characterized by scanning electronic microscopy (SEM). The experimental results show that the humidity-controlling gel with added LiCl exhibits high moisture storage and that the equilibrium maximum moisture content is 5.652 g/g at a 75.29% relative humidity (RH). A mass ratio of LiCl/sol=0.15 is demonstrated to be appropriate for the preparation of the new humidity-controlling composites. A coarse network with tiny pores is observed on the surface of the new humidity-controlling composites, and this pore network provides sufficient space for moisture adsorption.
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| 关 键 词： | composite materials gypsum humidity control sol-gel processing adsorption desorption |
Synthesis and analysis of new humidity-controlling composite materials |
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| Jian-li Shang,Zhi-fang Zong,Hao Zhang.Synthesis and analysis of new humidity-controlling composite materials[J].International Journal of Minerals,Metallurgy and Materials,2017,24(5):594-602. |
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| Authors: | Jian-li Shang Zhi-fang Zong Hao Zhang |
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| Institution: | College of Materials and Mineral Resources, Xi'an University of Architecture and Technology, Xi'an 710055, China |
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| Abstract: | Gypsum is a traditional building material.To improve the humidity-controlling properties of gypsum,we prepared a new type of humidity-controlling composite using the sol-gel method.Methods to determine the maximum equilibrium moisture content and speed of adsorption/desorption were subsequently applied to analyze the performance of the samples.The appearance and structural properties of the samples were characterized by scanning electronic microscopy (SEM).The experimental results show that the humidity-controlling gel with added LiCl exhibits high moisture storage and that the equilibrium maximum moisture content is 5.652 g/g at a 75.29％ relative humidity (RH).A mass ratio of LiCl/sol =0.15 is demonstrated to be appropriate for the preparation of the new humidity-controlling composites.A coarse network with tiny pores is observed on the surface of the new humidity-controlling composites,and this pore network provides sufficient space for moisture adsorption. |
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| Keywords: | composite materials gypsum humidity control sol-gel processing adsorption desorption |
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