研究目的
Investigating the fabrication and characterization of laser induced graphene (LIG) on microporous ceramic membranes for solvent separation processes.
研究成果
The LIG/ceramic membrane composite was successfully fabricated, showing high non-polar solvent fluxes and low water permeability. The membrane's performance is influenced by solvent polarity, with dipole moment and dielectric constant being major factors. The membrane achieved significant rejection of silica particles, indicating potential for submicron separation processes.
研究不足
The study focused on the fabrication and initial characterization of LIG/ceramic membrane composites. Further research is needed to optimize the membrane for specific applications and to understand the long-term stability and performance under various conditions.
1：Experimental Design and Method Selection:
The study involved the fabrication of LIG on TiO2 microfiltration ceramic discs using a CO2 infrared laser. The process included coating the ceramic supports with polyimide (PI) and converting it to LIG through laser irradiation.
2：Sample Selection and Data Sources:
Ceramic discs with a diameter of 47 mm, nominal pore size of 1.4 μm, and thickness of 2.6 mm were used as supports.
3：4 μm, and thickness of 6 mm were used as supports.
List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: A CO2 infrared laser, spin coater, FEI Quanta 600 FEG environmental scanning electron microscope, Tecnai F30 twin transmission electron microscope, and other characterization tools were used.
4：Experimental Procedures and Operational Workflow:
The ceramic supports were coated with polyimide, which was then converted to LIG using laser irradiation. The LIG layer was characterized for its surface area, morphology, and chemical properties.
5：Data Analysis Methods:
The study analyzed the permeability of solvents through the LIG membrane and the rejection of silica particles to understand the transport mechanism.
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