超亲水/水下疏油高硅布的制备及其油水分离性能  

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

作　　者：林楠煜 高峰 曲江英 涂晶晶 钟伟军 臧云浩 LIN Nan-Yu;GAO Feng;QU Jiang-Ying;TU Jing-Jing;ZHONG Wei-Jun;ZANG Yun-Hao(School of Environment and Civil Engineering,Dongguan University of Technology,Dongguan 523808,China)

机构地区：[1]东莞理工学院生态环境与建筑工程学院,东莞523808

出　　处：《应用化学》2023年第3期449-459,共11页Chinese Journal of Applied Chemistry

基　　金：国家自然科学基金(No.51972059)资助。

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SiO_(2)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/SiO_(2)/PDA@HSC)。研究了不同尺寸(50、300和500 nm)的SiO_(2)对油水分离性能的影响,发现随着SiO_(2)尺寸增加,分离效率逐渐降低,其中APTES/50 nm SiO_(2)/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/(m^(2)·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。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 SiO_(2)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/SiO_(2)/PDA@HSC).The effect of different sizes(50,300,500 nm)of SiO_(2)on the oil-water separation performance is studied.The separation efficiency decreases with the increase of SiO_(2)size.APTES/50 nm SiO_(2)/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/(m^(2)·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.

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 

分 类 号：O631[理学—高分子化学]