PVDF/magnetite blend membranes for enhanced flux and salt rejection in membrane distillation

被引:71
作者
Agbaje, Taofeeqah A. [1 ]
Al-Gharabli, Samer [1 ,2 ]
Mavukkandy, Musthafa O. [1 ]
Kujawa, Joanna [1 ,3 ]
Arafat, Hassan A. [1 ]
机构
[1] Khalifa Univ Sci & Technol, Masdar Inst, Dept Chem Engn, POB 54224, Abu Dhabi, U Arab Emirates
[2] German Jordanian Univ, Pharmaceut & Chem Engn Dept, Amman 11180, Jordan
[3] Nicolaus Copernicus Univ Torun, Fac Chem, 7 Gagarina St, PL-87100 Torun, Poland
关键词
Polyvinylidene fluoride; Magnetite; Nanoparticles; Composite membranes; Membrane distillation; HOLLOW-FIBER MEMBRANES; HYDROPHOBIC/HYDROPHILIC COMPOSITE MEMBRANES; SURFACE MODIFYING MACROMOLECULES; PVDF MEMBRANES; SOLUBILITY PARAMETERS; MAGNETIC NANOPARTICLES; OPERATIONAL PARAMETERS; MD MEMBRANES; PERFORMANCE; DESALINATION;
D O I
10.1016/j.desal.2018.02.012
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
This study reports on the enhancement of direct contact membrane distillation (DCMD) performance by incorporating magnetite nanoparticles (NP) in polyvinylidene fluoride (PVDF) membranes to render the membrane bulk hydrophilic while maintaining a hydrophobic top surface. Hansen solubility parameters (HSP) were first calculated to assess the affinity/compatibility of NP with the polymer, dope solution and aqueous feed. Extensive characterizations were done to elucidate the structural and physiochemical properties of the blend membranes. Energy dispersive spectrometry (EDS) analyses confirmed the uniform distribution of NP within the membrane matrix. Contact angle values showed that the NP did not compromise the hydrophobicity of the membrane top layer. The blend membrane had a 92% higher water uptake value, compared to the pristine sample, indicating the high hydrophilicity of the membrane bulk. Blend membrane also showed higher (ca. 36%) DCMD flux, due to their hydrophilic sub-layer, without compromising the salt rejection. Leaching tests were conducted using both water and concentrated acid to confirm the presence of nanoparticles and to demonstrate the membrane stability in aqueous medium.
引用
收藏
页码:69 / 80
页数:12
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