铜基选择浸润性网膜油水分离实验研究
|
摘要
针对现有网膜分离技术对复杂组分含油污水分离效率低、适应性差等技术难题,提出一种利用不同液体润湿性的差异性来实现多组分油/水混合物高效分离的方法。采用原位置换方法在铜网表面构建出一层微纳米尺度的Ag结构,制得具有超亲水-水下超疏油特性的网膜,进一步将制备的超亲水-水下超疏油网膜浸润在PDDA-PFO/SiO_2复合物溶液中制得具有超亲水-超疏油性能的网膜。实验结果表明:利用原位置换方法制备的网膜和修饰后的网膜均能实现对不同组分的油/水混合物的高效分离,分离效率大于98%,且修饰后的复合网膜的分离效率更高。此外,两种网膜均能够重复使用10次以上,并且分离效率基本不发生衰减,说明所制备的网膜具有很好的分离效率和耐久性。
Membranes for oil water separation from complex mixtures often show low efficiency and poor adaptability. A method for multi-component oil-contaminated water separation was proposed based on wettability difference of various liquids. Micro/nanoscale Ag structure was constructed on copper mesh surface via in-situ replacement to obtain superhydrophilic-underwater superoleophobic properties. The prepared mesh film was further modified in PDDA-PFO/SiO_2 solution to have superhydrophilic-superoleophobic properties. The results show that these two meshes have good separation performance for different oil-water mixtures with separation efficiencies over 98%. The further modified mesh has higher separation efficiency. In addition, both meshes can be reused for over 10 times without performance degradation. These results indicate that the prepared meshes have good separation efficiency and durability.
Membranes for oil water separation from complex mixtures often show low efficiency and poor adaptability. A method for multi-component oil-contaminated water separation was proposed based on wettability difference of various liquids. Micro/nanoscale Ag structure was constructed on copper mesh surface via in-situ replacement to obtain superhydrophilic-underwater superoleophobic properties. The prepared mesh film was further modified in PDDA-PFO/SiO_2 solution to have superhydrophilic-superoleophobic properties. The results show that these two meshes have good separation performance for different oil-water mixtures with separation efficiencies over 98%. The further modified mesh has higher separation efficiency. In addition, both meshes can be reused for over 10 times without performance degradation. These results indicate that the prepared meshes have good separation efficiency and durability.
引文
[1]SONG S K,SHON Z H,KIM Y K,et al.An oil spill accident and its impact on ozone levels in the surrounding coastal regions[J].Atmos.Environ,2010,45(6):1312-1322.
[2]杨晓伟,汪洋,刘秀生,等.含油污水处理技术研究进展[J].能源化工,2016,37(4):83-88.YANG X W,WANG Y,LIU X S,et al.Research progress on the technologies of oily wastewater treatment[J].Energy and Chemical,2016,37(4):83-88.
[3]CHU Z,FENG Y,SEEGER S.Oil/water separation with selective superantiwetting/superwetting surface materials[J].Angewandte Chemie-International Edition,2015,54(8):2328-2338.
[4]解宏瑞,邢文东,杨雨桐,等.含油废水处理技术现状及发展趋势[J].科技资讯,2015,18(13):137-139.XIE H R,XIN W D,YANG Y T,et al.The status and development trend of oily wastewater treatment technology[J].Technology Information,2015,18(13):137-139.
[5]ZHANG F,ZHANG W B,SHI Z,et al.Nanowire-haired inorganic membranes with superhydrophilicity and underwater ultralow adhesive superoleophobicity for high-efficiency oil/water separation.[J].Advanced Materials,2013,25(30):4192-4198.
[6]江雷,冯琳.仿生智能纳米界面材料[M].北京:化学工业出版社,2007:115-120.JIANG L,FENG L.Bionic intelligent nano interface material[M].Beijing:Chemical Industry Press,2007:115-120.
[7]CHOI H,ZHANG K,DIONYSIOU D D,et al.Effect of permeate flux and tangential flow on membrane fouling for wastewater treatment[J].Separation and Purification Technology,2005,45(1):68-78.
[8]YONG J,CHEN F,YANG Q,et al.Oil-water separation:a gift from the desert[J].Advanced Materials Interfaces,2016,3(7):1500650.
[9]薛众鑫,江雷.仿生水下超疏油表面[J].高分子学报,2012(10):1091-1101.XUE Z X,JIANG L.Bionic underwater superoleophobic surface[J].Acta Polymerica Sinica,2012(10):1091-1101.
[10]YANG J,ZHANG Z Z,XU X H,et al.Superhydrophilic-superoleophobic coatings[J].Journal of Materials Chemistry,2012,22(7):2834-2837.
[11]FENG L,ZHANG Z,MAI Z,et al.A super-hydrophobic and super-oleophilic coating mesh film for the separation of oil and water[J].Angew.Chem.Int.Ed Engl,2004,43(15):2012-2014.
[12]孙晓哲,于志家,徐鹏,等.油水乳化液在疏水复合涂层网膜上破乳分离的实验研究[J].高校化学工程学报2013,27(5):910-914.SUN X Z,YU Z J,XU P,et al.Experimental research of the demulsification of oil-in-water emulsions by a composite coating membrane[J].Journal of Chemical Engineering of Chinese Universities,2013,27(5):910-914.
[13]CASPER C L,STEPHENS J S,TASSI N G,et al.Controlling surface morphology of electrospun polystyrene fibers:effect of humidity and molecular weight in the electrospinning process[J].Macromolecules,2004,37(2):573-578.
[14]ZHENG J,ZHANG H,ZHAO Z,et al.Construction of hierarchical structures by electrospinning or electrospraying[J].Polymer,2012,53(2):546-554.
[15]ZHENG J,HE A,HAN C.Studies on the controlled morphology and wettability of polystyrene surfaces by electrospinning or electrospraying[J].Polymer,2006,47(20):7095-7102.
[16]王宝娟,董哲勤,马晓华,等.耐化学腐蚀FAS-TiO2超疏水网制备及其油水分离性能[J].高校化学工程学报,2017,31(3):679-684.WANG B J,DONG Z Q,MA X H,et al.Fabrication and oil/water separation performance of a chemical resistant superhydrophobic mesh[J].Journal of Chemical Engineering of Chinese Universities,2017,31(3):679-684.
[17]WENZEL R.Resistance if solid surfaces to wetting by water[J].Industrial and Engineering Chemistry Research,1936,28(8):988-994.
[18]CASSIE A B D.Contact angle s[J].Discussions of the Faraday Society,1948,3(5):11-16.
[19]CASSIE A B D,BAXTER S.Wettability of porous surface[J].Trans Faraday Soc,1944,40(1):546-551.
[20]TUTEJA A,CHOI W,MA M.Designing superoleophobic surface[J].Science,2007,318(5856):1618-1622.
[21]JIN M.H,LI S.S,WANG J,et al.Underwater superoleophilicity to superoleophobicity:role of trapped air[J].Chemical Communications,2012,48(96):11745-11747.
[22]袁腾,陈卓,周显宏,等.基于超亲水超疏油原理的网膜及其在油水分离中的应用[J].化学学报,2014.65(6):1941-1955.YUAN T,CHEN Z,ZHOU X H,et al.Coated mesh film based on superhydrophilic and superoleophobic principle and its application in oil-water separation[J].Acta Chimica Sinaca,2014.65(6):1941-1955.
[2]杨晓伟,汪洋,刘秀生,等.含油污水处理技术研究进展[J].能源化工,2016,37(4):83-88.YANG X W,WANG Y,LIU X S,et al.Research progress on the technologies of oily wastewater treatment[J].Energy and Chemical,2016,37(4):83-88.
[3]CHU Z,FENG Y,SEEGER S.Oil/water separation with selective superantiwetting/superwetting surface materials[J].Angewandte Chemie-International Edition,2015,54(8):2328-2338.
[4]解宏瑞,邢文东,杨雨桐,等.含油废水处理技术现状及发展趋势[J].科技资讯,2015,18(13):137-139.XIE H R,XIN W D,YANG Y T,et al.The status and development trend of oily wastewater treatment technology[J].Technology Information,2015,18(13):137-139.
[5]ZHANG F,ZHANG W B,SHI Z,et al.Nanowire-haired inorganic membranes with superhydrophilicity and underwater ultralow adhesive superoleophobicity for high-efficiency oil/water separation.[J].Advanced Materials,2013,25(30):4192-4198.
[6]江雷,冯琳.仿生智能纳米界面材料[M].北京:化学工业出版社,2007:115-120.JIANG L,FENG L.Bionic intelligent nano interface material[M].Beijing:Chemical Industry Press,2007:115-120.
[7]CHOI H,ZHANG K,DIONYSIOU D D,et al.Effect of permeate flux and tangential flow on membrane fouling for wastewater treatment[J].Separation and Purification Technology,2005,45(1):68-78.
[8]YONG J,CHEN F,YANG Q,et al.Oil-water separation:a gift from the desert[J].Advanced Materials Interfaces,2016,3(7):1500650.
[9]薛众鑫,江雷.仿生水下超疏油表面[J].高分子学报,2012(10):1091-1101.XUE Z X,JIANG L.Bionic underwater superoleophobic surface[J].Acta Polymerica Sinica,2012(10):1091-1101.
[10]YANG J,ZHANG Z Z,XU X H,et al.Superhydrophilic-superoleophobic coatings[J].Journal of Materials Chemistry,2012,22(7):2834-2837.
[11]FENG L,ZHANG Z,MAI Z,et al.A super-hydrophobic and super-oleophilic coating mesh film for the separation of oil and water[J].Angew.Chem.Int.Ed Engl,2004,43(15):2012-2014.
[12]孙晓哲,于志家,徐鹏,等.油水乳化液在疏水复合涂层网膜上破乳分离的实验研究[J].高校化学工程学报2013,27(5):910-914.SUN X Z,YU Z J,XU P,et al.Experimental research of the demulsification of oil-in-water emulsions by a composite coating membrane[J].Journal of Chemical Engineering of Chinese Universities,2013,27(5):910-914.
[13]CASPER C L,STEPHENS J S,TASSI N G,et al.Controlling surface morphology of electrospun polystyrene fibers:effect of humidity and molecular weight in the electrospinning process[J].Macromolecules,2004,37(2):573-578.
[14]ZHENG J,ZHANG H,ZHAO Z,et al.Construction of hierarchical structures by electrospinning or electrospraying[J].Polymer,2012,53(2):546-554.
[15]ZHENG J,HE A,HAN C.Studies on the controlled morphology and wettability of polystyrene surfaces by electrospinning or electrospraying[J].Polymer,2006,47(20):7095-7102.
[16]王宝娟,董哲勤,马晓华,等.耐化学腐蚀FAS-TiO2超疏水网制备及其油水分离性能[J].高校化学工程学报,2017,31(3):679-684.WANG B J,DONG Z Q,MA X H,et al.Fabrication and oil/water separation performance of a chemical resistant superhydrophobic mesh[J].Journal of Chemical Engineering of Chinese Universities,2017,31(3):679-684.
[17]WENZEL R.Resistance if solid surfaces to wetting by water[J].Industrial and Engineering Chemistry Research,1936,28(8):988-994.
[18]CASSIE A B D.Contact angle s[J].Discussions of the Faraday Society,1948,3(5):11-16.
[19]CASSIE A B D,BAXTER S.Wettability of porous surface[J].Trans Faraday Soc,1944,40(1):546-551.
[20]TUTEJA A,CHOI W,MA M.Designing superoleophobic surface[J].Science,2007,318(5856):1618-1622.
[21]JIN M.H,LI S.S,WANG J,et al.Underwater superoleophilicity to superoleophobicity:role of trapped air[J].Chemical Communications,2012,48(96):11745-11747.
[22]袁腾,陈卓,周显宏,等.基于超亲水超疏油原理的网膜及其在油水分离中的应用[J].化学学报,2014.65(6):1941-1955.YUAN T,CHEN Z,ZHOU X H,et al.Coated mesh film based on superhydrophilic and superoleophobic principle and its application in oil-water separation[J].Acta Chimica Sinaca,2014.65(6):1941-1955.