应用化学 ›› 2023, Vol. 40 ›› Issue (3): 449-459.DOI: 10.19894/j.issn.1000-0518.220296

• 研究论文 • 上一篇    下一篇

超亲水/水下疏油高硅布的制备及其油水分离性能

林楠煜, 高峰(), 曲江英, 涂晶晶, 钟伟军, 臧云浩   

  1. 东莞理工学院生态环境与建筑工程学院,东莞 523808
  • 收稿日期:2022-09-02 接受日期:2023-02-18 出版日期:2023-03-01 发布日期:2023-03-27
  • 通讯作者: 高峰
  • 基金资助:
    国家自然科学基金(51972059)

Preparation of Super-hydrophilic/Underwater Oil-phobic High Silicon Cloth and Its Oil-water Separation Performance

Nan-Yu LIN, Feng GAO(), Jiang-Ying QU, Jing-Jing TU, Wei-Jun ZHONG, Yun-Hao ZANG   

  1. School of Environment and Civil Engineering,Dongguan University of Technology,Dongguan 523808,China
  • Received:2022-09-02 Accepted:2023-02-18 Published:2023-03-01 Online:2023-03-27
  • Contact: Feng GAO
  • About author:fenggao2003@163.com
  • Supported by:
    the National Nature Science Foundation of China(51972059)

摘要:

以机械强度高、柔性好和耐热耐酸的高硅布(HSC)为基底,通过一步接枝法和自聚合法对其浸润性给予改性。采用3-氨丙基三乙氧基硅烷(APTES)作为“双面胶”接枝在其表面: 一面利用静电作用沉积纳米SiO2提供表面粗糙度,另一面聚合具有强亲水性的聚多巴胺(PDA),获得了超亲水/水下疏油高硅布(APTES/SiO2/PDA@HSC)。研究了不同尺寸(50、300和500 nm)的SiO2对油水分离性能的影响,发现随着SiO2尺寸增加,分离效率逐渐降低,其中APTES/50 nm SiO2/PDA@HSC的油水分离性能最好。它的水接触角为0(°),表现出明显的水下疏油性能,对汽油-水混合物分离效率为98%,滤液含油量低至37 mg/L,油水混合物通量为7184 L/(m2·h),10次循环分离效率仍能达到97.4%,对花生油和泵油也有明显的油水分离效果。

关键词: 高硅布, 超亲水/水下疏油, 3-氨丙基三乙氧基硅烷, 聚多巴胺, 油水分离

Abstract:

High silica cloth (HSC) with high mechanical strength, good flexibility, superior heat and acid resistance has been modified by one-step grafting method and self-polymerization method. 3-Aminopropyltriethoxysilane (APTES) is grafted on HSC′s surface as a double-side adhesive. Nano SiO2 is used to provide surface roughness by electrostatic deposition. After that, polydopamine (PDA) with strong hydrophilic properties is polymerized on the surface of HSC to obtain super-hydrophilic/underwater oil-phobic high silica cloth (APTES/SiO2/PDA@HSC). The effect of different sizes (50, 300, 500 nm) of SiO2 on the oil-water separation performance is studied. The separation efficiency decreases with the increase of SiO2 size. APTES/50 nm SiO2/PDA@HSC shows the best performance. Its water contact angle is 0(°) and the separation efficiency is about 98%. The oil content of the filtrate after separating the gasoline-water mixture is as low as 37 mg/L and the oil-water mixture flux is 7184 L/(m2·h). Its separation efficiency can still reach 97.4% after 10 cycles, and it also has obvious oil-water separation effect on peanut oil and pump oil.

Key words: High silica cloth, Super hydrophilic/underwater oil-phobic, 3-Aminopropyltriethoxysilane, Polydopamine, Oil-water separation

中图分类号: