Surface Structure Regulation and Environmental Performance Optimization of Superhydrophobic Granular Materials for Ecological Restoration

被引：0
|
作者：
Zhang X. [1 ,2 ]
Lü X. [1 ,2 ]
Zhang H. [3 ]
Luo M. [1 ,2 ]
机构：
[1] Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education, Tongji University, Shanghai
[2] School of Materials Science and Engineering, Tongji University, Shanghai
[3] China Communications Harbor（Shanghai） Technology Co.， Ltd., Shanghai
来源：
Jianzhu Cailiao Xuebao/Journal of Building Materials | 2022年 / 25卷 / 09期
关键词：
environmental performance; hydrophobicity; impermeability; superhydrophobic granular material; surface structure;
D O I：
10.3969/j.issn.1007-9629.2022.09.011
中图分类号：
学科分类号：
摘要：
Superhydrophobic granular materials were prepared with desert sand for ecological restoration. The influence of surface structure， including the amount of surface coating resin and content of micro‑nano materials， on the hydrophobicity and impermeability of the superhydrophobic granular materials was studied. Considering total volatile organic compounds（TVOC）， its variation and environmental performance of so prepared superhydrophobic granular materials were evaluated when the hydrophobic calcium carbonate or activated carbon were used as supplementary micro‑materials. The results show that the granular materials coated with pure resin only show hydrophobicity with a contact angle of 90.5°. Rising surface rough structure can greatly improve the hydrophobicity and impermeability of superhydrophobic granular materials， and the two‑level rough structure is better than the one‑level rough structure. When achieving superhydrophobicity， the static water‑resistance height of superhydrophobic particles with two‑level rough structure is 255 mm， and that of superhydrophobic particles with one‑level rough structure is 230 mm. The TVOC adsorption curve shows that the superhydrophobic granular materials prepared by activated carbon possess good superhydrophobicity and environmental‑friendliness， with the TVOC concentration in the air reducing by about 86.7%. © 2022 Tongji University. All rights reserved.
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页码：960 / 967
页数：7
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