膜科学与技术

海藻酸钙改性聚偏氟乙烯静电纺丝膜用于油水乳液的自重驱动分离

作者：钱明，孟娇，郎万中

单位：上海师范大学教育部资源化学重点实验室，化学与材料科学学院，上海200234

关键词：聚偏氟乙烯膜；静电纺丝；微滤膜；油水分离

出版年,卷(期):页码： 2022,42(2):89-94

摘要：

聚偏氟乙烯(PVDF)具有化学稳定性良好、机械强度高和热稳定性好等优点。通过静电纺丝技术制备的PVDF膜具有高的孔隙率和较高的纯水渗透系数。利用海藻酸钠和钙离子交联对静电纺丝PVDF膜进行改性得到海藻酸钙改性聚偏氟乙烯（CaAlg/PVDF）复合微滤膜，将其运用于油水乳液的分离。结果表明，所制备的改性膜具有更好的亲水性，对含油废水的渗透系数高达2000 L/（m2·h·bar）以上，对其中乳化的甲苯、环己烷的截留率达99 %以上。

Polyvinylidene fluoride (PVDF) has the advantages of good chemical stability, high mechanical strength and good thermal stability. The PVDF membranes prepared by electrospinning technology has high porosity and high water flux. In this work, the modified microfiltration membranes（CaAlg /PVDF） were prepared by electrospinning and modified with calcium alginate, and used in the separation of oil-in-water emulsions. The results show the prepared CaAlg /PVDF membranes have better hydrophilicity, the permeation flux of emulsified oil-containing wastewater is more than 2000 L/（m2·h·bar）, and the rejection rate of emulsified toluene and cyclohexane is more than 99 %.

钱明（1997-），女，江苏泰兴，无，研究生，硕士，主要从事膜分离技术研究

参考文献：

[1] Tao M, Xue L, Liu F, et al. An intelligent superwetting PVDF membrane showing switchable transport performance for oil/water separation[J]. Adv Mater, 2014, 26:2943–2948.
[2] Shi Z, Zhang W, Zhang F, et al. Ultrafast separation of emulsified oil/water mixtures by ultrathin free-standing single-walled carbon nanotube network films[J]. Adv. Mater, 2013, 25:2422–2427.
[3] Tummons E. N, Chew J.W, Fane A.G, et al. Ultrafiltration of saline oil-in-water emulsions stabilized by an anionic surfactant: Effect of surfactant concentration and divalent counterions[J]. J. Membr. Sci, 2017, 537:384–395.
[4] 杨思民,王建强,刘富.油水分离膜研究进展[J].膜科学与技术, 2019, 39(3):132–141.
[5] Padaki M, Surya Murali R, Abdullah M.S, et al. Membrane technology enhancement in oil-water separation. A review[J]. Desalination, 2015, 357:197–207.
[6] 李婷婷,张志明,韩正波.基于静电纺丝技术的聚合物基 MOFs 纳米纤维膜的研究进展[J].无机材料学报, 2021, 36(6):592–600.
[7] 张庆磊,吕晓龙,杨士春,等.聚偏氟乙烯分离膜的亲水改性[J].膜科学与技术, 2012, 32(4):17–20.
[8] Choi J.G, Bae T.H, Kim J.H, et al. The behavior of membrane fouling initiation on the crossflow membrane bioreactor system[J]. J. Membr. Sci, 2002, 203:103-113.
[9] Choo K.H, Lee C.H. Membrane fouling mechanisms in the membrane-coupled anaerobic bioreactor[J]. Water Res, 1996, 30:1771-1780.
[10] Xu J.B, Bartley J.P, Johnson R.A. Preparation and characterization of alginate–carrageenan hydrogel films crosslinked using a water-soluble carbodiimide (WSC)[J]. J. Membr. Sci, 2003, 218:131–146.
[11] Zhang X, Lin B, Zhao K, et al. A free-standing calcium alginate/polyacrylamide hydrogel nanofiltration membrane with high anti-fouling performance: Preparation and characterization[J]. Desalination, 2015, 365:234–241.
[12] Zhao K, Zhang X, Wei J, et al. Calcium alginate hydrogel filtration membrane with excellent anti-fouling property and controlled separation performance[J]. J. Membr. Sci, 2015, 492:536–546.
[13] 高学理,王伟伟,陈晓琳,等.界面聚合法制备海藻酸钠／聚砜复合纳滤膜[J].膜科学与技术, 2011, 31(4):27–30.
[14] Zhang X, Lin B, Zhao K, et al. A free-standing calcium alginate/polyacrylamide hydrogel nanofiltration membrane with high anti-fouling performance: Preparation and characterization[J]. Desalination, 2015, 365:234–241.
[15] Yoo S.M, Ghosh R. A method for coating of hollow fiber membranes with calcium alginate[J]. J. Membr. Sci, 2018, 558:45–51.
[16] Xu S.J, Chen G.E, Xu Z.L. Excellent anti-fouling performance of PVDF polymeric membrane modified by enhanced CaA gel-layer[J]. J. Ind. Eng. Chem, 2018, 58:179–188.
[17] Cai Z.J, Cong Z, Ping X, et al. Calcium alginate-coated electrospun polyhydroxybutyrate/carbon nanotubes composite nanofibers as nanofiltration membrane for dye removal[J]. J. Mater. Sci, 2018, 53:14801–14820.
[18] Simpson N.E, Stabler C.L, Simpson C.P, et al. The role of the CaCl2-guluronic acid interaction on alginate encapsulated beta TC3 cells, Biomaterials[J]. 2004, 25:2603–2610.
[19] Wong T.W, Chan L.W, Kho S.B, et al. Design of controlled-release solid dosage forms of alginate and chitosan using microwave[J]. J. Controll. Release, 2002, 84:99–114.
[20] Zhang M, Lin H, Shen L, et al. Effect of calcium ions on fouling properties of alginate solution and its mechanisms[J]. J. Membr. Sci, 2017, 525:320–329.
[21] Akpan U.G, Hameed B.H. Enhancement of the photocatalytic activity of TiO2 by doping it with calcium ions[J]. J. Colloid. Interf. Sci, 2011, 357:168–178.
[22] Ai L, Gao X, Jiang J. In situ synthesis of cobalt stabilized on macroscopic biopolymer hydrogel as economical and recyclable catalyst for hydrogen generation from sodium borohydride hydrolysis[J]. J. Power Sources, 2014, 257:213-220.

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