pvdf membrane
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Desalination ◽  
2022 ◽  
Vol 526 ◽  
pp. 115533
Author(s):  
Jun Pan ◽  
Min Chen ◽  
Xianli Xu ◽  
Shi-Peng Sun ◽  
Zhaohui Wang ◽  
...  

2022 ◽  
Vol 45 ◽  
pp. 102519
Author(s):  
Zixin Wu ◽  
Jiaying Tian ◽  
Lili Wu ◽  
Chaocan Zhang

Polymers ◽  
2022 ◽  
Vol 14 (1) ◽  
pp. 186
Author(s):  
Sri Mulyati ◽  
Sri Aprilia ◽  
Syawaliah Muchtar ◽  
Yanna Syamsuddin ◽  
Cut Meurah Rosnelly ◽  
...  

Potential use of tannic acid (TA) as an additive for fabrication of polyvinylidene difluoride (PVDF) membrane was investigated. The TA was introduced by blending into the dope solution with varying concentrations of 0, 1, 1.5, and 2 wt%. The prepared membranes were characterized and evaluated for filtration of humic acid (HA) solution. The stability of the membrane under harsh treatment was also evaluated by one-week exposure to acid and alkaline conditions. The results show that TA loadings enhanced the resulting membrane properties. It increased the bulk porosity, water uptake, and hydrophilicity, which translated into improved clean water flux from 15.4 L/m2.h for the pristine PVDF membrane up to 3.3× for the TA-modified membranes with the 2 wt% TA loading. The flux recovery ratio (FRR) of the TA-modified membranes (FRRs = 78–83%) was higher than the pristine one (FRR = 58.54%), with suitable chemical stability too. The improved antifouling property for the TA-modified membranes was attributed to their enhanced hydrophilicity thanks to improved morphology and residual TA in the membrane matric.


Nano Energy ◽  
2022 ◽  
pp. 106930
Author(s):  
Licheng Wan ◽  
Wenrou Tian ◽  
Najun Li ◽  
Dongyun Chen ◽  
Qingfeng Xu ◽  
...  

2022 ◽  
Vol 302 ◽  
pp. 114103
Author(s):  
Fengbin Zhao ◽  
Xinyun Yao ◽  
Chang Liu ◽  
Xianqiang Ran ◽  
Chengxian Wang ◽  
...  

2021 ◽  
pp. 1-8
Author(s):  
Jiale Qu ◽  
Shen Gao ◽  
Zhenghao Hou

Polyvinylidene fluoride (PVDF) is a promising membrane material in ultrafiltration (UF) applications; its extensive application however is limited due to the disadvantage in hydrophilicity and low surface energy. Herein, a sort of TPU-modified PVDF membrane is prepared by blending method and its hydrophilicity is compared with a series of pure/modified PVDF membranes. The contact angle and pure water flux (PWF) results demonstrate that the hydrophilicity of the TPU-modified PVDF membrane is enhanced, and the performance is not inferior to that of traditional pore-modified PVDF membranes. SEM image shows that the TPU-modified PVDF membrane maintains morphology of the pure PVDF membrane, indicating that TPU molecules have excellent compatibility with PVDF molecules and can maintain the mechanical property of PVDF membrane to a certain extent. Finally, we explore the effects of TPU molecules and PVDF molecules on water molecules, respectively, from a microscopic perspective involving first principles. This investigation not only establishes that PVDF membrane has been prepared with enhanced hydrophilicity, but also provides a novel avenue for the modification of membrane properties.


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