A novel approach to fabricate interconnected sponge-like and highly permeable polyvinylidene fluoride hollow fiber membranes for direct contact membrane distillation

2014 ◽  
Vol 60 ◽  
pp. 262-272 ◽  
Author(s):  
Ziyi Wang ◽  
Linquan Sun ◽  
Qin Wang ◽  
Baoan Li ◽  
Shichang Wang
Keyword(s):  
Hollow Fiber ◽  
Direct Contact ◽  
Polyvinylidene Fluoride ◽  
Membrane Distillation ◽  
Hollow Fiber Membranes ◽  
Direct Contact Membrane Distillation ◽  
Novel Approach ◽  
Fiber Membranes

Effect of Hydrophobicity Degree on PVDF Hollow Fiber Membranes for Textile Wastewater Treatment Using Direct Contact Membrane Distillation

2013 ◽  
Vol 65 (4) ◽  
Author(s):  
N. M. Mokhtar ◽  
W. J. Lau ◽  
P. S. Goh
Keyword(s):  
Contact Angle ◽  
Hollow Fiber ◽  
Direct Contact ◽  
Polyvinylidene Fluoride ◽  
Textile Wastewater ◽  
Membrane Distillation ◽  
Hollow Fiber Membranes ◽  
Hydrophobic Membrane ◽  
Direct Contact Membrane Distillation ◽  
Fiber Membranes

The objectives of this study are to study the effect of hydrophobicity degree of  polyvinylidene fluoride (PVDF) hollow fiber membranes blended with different types of additives i.e. ethylene glycol (EG) and polyvinylpyrrolidone (PVP) on textile wastewater application. The degree of hydrophobicity of each membrane was analyzed using contact angle goniometer. The membrane morphology and gas permeability were characterized prior to filtration experiment. Both membranes were tested using direct contact membrane distillation (DCMD) system and their performances were evaluated with respect to water flux and dye removal. This study revealed that the membrane with higher contact angle has greater stability in terms of flux and dye rejection compared to the membrane with low hydrophobic property. This is mainly due to the low surface energy obtained by the highly hydrophobic membrane that prevented the liquids from both sides to penetrate through membrane pores.

scholarly journals Performance Comparison between Polyvinylidene Fluoride and Polytetrafluoroethylene Hollow Fiber Membranes for Direct Contact Membrane Distillation

Membranes ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 52 ◽  
Author(s):  
Frank Y. C. Huang ◽  
Allie Arning
Keyword(s):  
United States ◽  
Hollow Fiber ◽  
Packing Density ◽  
Direct Contact ◽  
Polyvinylidene Fluoride ◽  
Water Flux ◽  
Membrane Distillation ◽  
Hollow Fiber Membranes ◽  
Direct Contact Membrane Distillation ◽  
Fiber Membranes

Increasing water demand coupled with projected climate change puts the Southwestern United States at the highest risk of water sustainability by 2050. Membrane distillation offers a unique opportunity to utilize the substantial, but largely untapped geothermal brackish groundwater for desalination to lessen the stress. Two types of hydrophobic, microporous hollow fiber membranes (HFMs), including polytetrafluoroethylene (PTFE) and polyvinylidene fluoride (PVDF), were evaluated for their effectiveness in direct contact membrane distillation (DCMD). Water flux and salt rejection were measured as a function of module packing density and length in lab-scale systems. The PVDF HFMs generally exhibited higher water flux than the PTFE HFMs possibly due to thinner membrane wall and higher porosity. As the packing density or module length increased, water flux declined. The water production rate per module, however, increased due to the larger membrane surface area. A pilot-scale DCMD system was deployed to the 2nd largest geothermally-heated greenhouse in the United States for field testing over a duration of about 22 days. The results demonstrated the robustness of the DCMD system in the face of environmental fluctuation at the facility.

Polyazole Hollow Fiber Membranes for Direct Contact Membrane Distillation

2013 ◽  
Vol 52 (31) ◽  
pp. 10425-10429 ◽  
Author(s):  
Husnul Maab ◽  
Ahmad Al Saadi ◽  
Lijo Francis ◽  
Sara Livazovic ◽  
Noreddine Ghafour ◽  
...  
Keyword(s):  
Hollow Fiber ◽  
Direct Contact ◽  
Membrane Distillation ◽  
Hollow Fiber Membranes ◽  
Direct Contact Membrane Distillation ◽  
Fiber Membranes
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