Related Experiment Video
Updated: Oct 9, 2025
08:34
A Dual-Functional Electroactive Filter Towards Simultaneously SbIII Oxidation and Sequestration
Published on: December 5, 2019
5.7K
A Cleanable Self-Assembled Nano-SiO2/(PTFE/PEI)/PPS Composite Filter Medium for High-Efficiency Fine Particulate
Yan Luo1,2, Zhongyun Shen2, Zhihao Ma2
1Department of Chemistry, Zhejiang University, Hangzhou 310027, China.
Materials (Basel, Switzerland)
|December 24, 2021
Summary
A novel composite filter material using silicon dioxide, polytetrafluoroethylene, polyethyleneimine, and polyphenylene sulfide (SiO2/PTFE/PEI/PPS) achieves over 99.55% PM2.5 filtration efficiency. This advanced material offers enhanced durability and reusability for effective fine particulate capture.
Area of Science:
- Materials Science
- Chemical Engineering
- Environmental Science
Background:
- Polyphenylene sulfide (PPS) nonwovens are utilized as cleanable filter media.
- Improving the performance of existing filter materials is crucial for air purification.
Purpose of the Study:
- To fabricate a novel composite filter medium with enhanced filtration efficiency and durability.
- To investigate the properties and performance of a SiO2/PTFE/PEI/PPS composite filter.
Main Methods:
- Fabrication of a SiO2/PTFE/PEI/PPS composite using layer-by-layer self-assembly on a PPS nonwoven substrate.
- Deposition of PTFE/PEI bilayers followed by SiO2 nanoparticle coating.
- Characterization of mechanical properties, wear, oxidation, and heat resistance.
Main Results:
- The composite filter exhibited improved mechanical properties and enhanced resistance to wear, oxidation, and heat compared to pure PPS.
- Achieved a PM2.5 filtration efficiency of up to 99.55%.
- Demonstrated superior reusability due to low surface energy PTFE layers facilitating dust cake detachment.
Conclusions:
- The fabricated SiO2/PTFE/PEI/PPS composite filter medium shows excellent performance for fine particulate filtration.
- The modified PTFE layers enhance filtration by increasing surface area and narrowing inter-fiber spaces, while also improving cleanability.
- The three-dimensional structure ensures low pressure drop during filtration, making it a promising material for air filtration applications.
