| 摘要: |
| 以大漠沙为基材，通过对表面覆膜树脂用量和微/纳米级辅材掺量的复合调控，研究了颗粒表面结构对生态修复用超疏水颗粒疏水性和抗渗性的影响.针对生产制备过程中不可避免地会产生挥发性有机化合物这一问题，对比研究了疏水型碳酸钙和亲水型活性炭分别作为微米级辅材时生产过程中总挥发性有机化合物（TVOC）浓度的变化情况，并以此来表征超疏水颗粒的环保性.结果表明：纯树脂覆膜的试样仅具有疏水性，接触角约90.5°；表面粗糙结构的构建能够大大提高超疏水颗粒的疏水性和抗渗性，且表面二级粗糙结构优于一级粗糙结构，在达到超疏水效果时，具有表面二级粗糙结构的超疏水颗粒抗静水高度约为255 mm，具有表面一级粗糙结构的超疏水颗粒抗静水高度约为230 mm；TVOC吸附曲线表明，采用活性炭制备的超疏水颗粒具有超疏水性和环境友好性，空气中的TVOC质量浓度降低约86.7%. |
| 关键词: 超疏水颗粒 表面结构 疏水性 抗渗性 环保性 |
| DOI：10.3969/j.issn.1007-9629.2022.09.011 |
| 分类号:TU577 |
| 基金项目: |
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| Surface Structure Regulation and Environmental Performance Optimization of Superhydrophobic Granular Materials for Ecological Restoration |
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ZHANG Xiong1,2, Lü Xinyan1,2, ZHANG Heng3, LUO Menghao1,2
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1.Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education， Tongji University， Shanghai 201804， China;2.School of Materials Science and Engineering， Tongji University， Shanghai 201804， China;3.China Communications Harbor（Shanghai） Technology Co.， Ltd.， Shanghai 200030， China
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| Abstract: |
| 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%. |
| Key words: superhydrophobic granular material surface structure hydrophobicity impermeability environmental performance |
