Related Experiment Video
Updated: Mar 8, 2026
Preparation of Light-responsive Membranes by a Combined Surface Grafting and Postmodification Process
Published on: March 21, 2014
Polypyrrole blending modification for PVDF conductive membrane preparing and fouling mitigation
Jiadong Liu1, Chang Tian1, Jingxue Xiong1
1School of Environmental & Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China; Key Laboratory of Membrane Separation of Shaanxi Province, Xi'an University of Architecture and Technology, Xi'an 710055, China.
This study enhanced polyvinylidene fluoride (PVDF) membranes using polypyrrole (PPy) and sodium dodecyl benzene sulfonate (SDBS). The modified membranes showed improved anti-fouling properties and conductivity for better filtration.
Area of Science:
- Materials Science
- Chemical Engineering
- Environmental Science
Background:
- Polyvinylidene fluoride (PVDF) membranes are widely used in water treatment.
- Membrane fouling remains a significant challenge, reducing efficiency and lifespan.
- Conductive polymers offer potential for enhanced membrane performance.
Purpose of the Study:
- To modify PVDF membranes with polypyrrole (PPy) and sodium dodecyl benzene sulfonate (SDBS).
- To investigate the impact of PPy-SDBS modification on membrane properties and performance.
- To evaluate the anti-fouling capabilities and conductivity of the modified membranes.
Main Methods:
- Blending modification of PVDF membranes with PPy as a conductive additive and SDBS as a dopant.
- Characterization of physicochemical properties, including pore structure and surface morphology.
- Filtration experiments to assess anti-fouling performance, effluent turbidity, and flux.
- Conductivity measurements during immersion in activated sludge.
- Evaluation of filtration performance under an applied electric field.
Main Results:
- Modification resulted in shrunk macropores and a sponge-like cross-section structure.
- PPy-SDBS modified membranes exhibited superior anti-fouling performance and lower effluent turbidity compared to blank membranes.
- Membrane conductivity increased steadily during immersion in activated sludge.
- An applied electric field of 0.1V enhanced yeast filtration flux and foulant retention.
Conclusions:
- PPy-SDBS modification effectively enhances the anti-fouling properties and conductivity of PVDF membranes.
- The modified membranes show promise for improved performance in water treatment applications.
- The application of an electric field further boosts filtration efficiency and foulant retention.
