研究目的
Investigating the effect of corona treatment on the microstructure of Polyvinylidene Fluoride (PVDF) membrane.
研究成果
Corona treatment induces the formation of β phase in PVDF and changes the hole structure, making it more porous initially, then denser, and finally causing cracking with prolonged treatment. This indicates significant influence of corona treatment on PVDF membrane's bulk structure.
研究不足
The study is limited to the effects of corona treatment on PVDF membrane microstructure under specific conditions (5 kV voltage, 3 mm distance). The long-term stability and performance of treated membranes in practical applications were not investigated.
1：Experimental Design and Method Selection:
The study involved treating PVDF membranes with corona discharge and analyzing the changes in microstructure using XRD and EIS.
2：Sample Selection and Data Sources:
PVDF membranes were prepared by phase conversion method and treated with corona discharge for varying times.
3：List of Experimental Equipment and Materials:
PVDF powder, N,N-Dimethyl formamide (DMF), KCl, x-ray diffraction (XRD) equipment, CS310H impedance analyzer.
4：Experimental Procedures and Operational Workflow:
PVDF membranes were treated with corona discharge for 1 h to 5 h, followed by XRD and EIS analysis to study the structural changes.
5：Data Analysis Methods:
Membrane resistance and capacitance were calculated from EIS data to evaluate the hole structure changes.
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