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Microfluidics is a technology that precisely controls and manipulates fluids in tiny channels and is widely used in many fields such as chemistry, biology, medicine and engineering.
1. Preparation stage
Prepare reagents and materials: All necessary reagents and materials need to be prepared, including PLGA powder, polyvinyl alcohol (PVA), dichloromethane, etc. At the same time, ensure that all reagents are analytically pure to reduce experimental errors.
Equipment inspection: Carefully check whether the preparation instrument and its accessories are intact, and confirm whether the power supply and computer connection are normal. Check the working status of the air source processing device and air compressor to ensure that there is no air leakage.
2. Chip preparation stage
Install the chip: Install the microfluidic chip correctly on the fixture and make sure all connections are sealed. Use silicone plugs to seal the inlets of the chip and fixture to prevent liquid leakage.
Setting parameters: Set the pressure and flow rate of channel 1 (water phase) and channel 2 (oil phase) through FluidicLabSuite software. Adjust the pressure output channel according to experimental requirements to ensure the stability and uniformity of droplet generation.
3. Data collection and analysis phase
Monitor the experimental process: Use a microscope to observe the generation of microdroplets in real time, and use software to record key parameters such as flow rate and pressure. These data are crucial for subsequent analysis of the monodispersity and stability of the droplets.
Analyze data: After the experiment is completed, the collected data is analyzed in detail to evaluate the size distribution, morphology and encapsulation effect of PLGA microspheres. Data analysis can be used to optimize experimental conditions and improve the quality and yield of microspheres.
4. Cleaning and maintenance phase
Cleaning equipment: After the experiment, clean all parts of the microfluidic equipment, especially the pipes, flow sensors and chips. Use ultrapure water or appropriate detergents to remove residual reagents and materials to prevent clogging and corrosion.
Maintain equipment: Regularly inspect and maintain the equipment, including checking whether the chip is damaged and whether the pipeline is aged. Replace damaged parts in time to ensure the long-term stable operation of the equipment.
In addition, when using the microfluidic preparation instrument, the following points should be noted:
Ensure that the laboratory environment is clean and dust-free to prevent impurities from entering the equipment and affecting the experimental results.
Operators should wear appropriate protective gear, such as gloves and lab coats, to prevent direct contact with harmful chemicals.
During the experiment, you should pay attention to the operating status of the equipment at all times. If any abnormality is found, the operation should be stopped immediately and the problem should be corrected.
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