Sample interview questions: Can you discuss your familiarity with the challenges and opportunities of using polymers in membrane-based processes?
Sample answer:
Can you discuss your research interests with the challenges and opportunities of using polymers in membrane-based processes?
Polymers offer a unique combination of properties that make them ideal for use in membrane-based processes. These properties include:
- Permeability: Polymers can be tailored to have the desired permeability for a given application. This is important for controlling the flux of molecules through the membrane.
- Selectivity: Polymers can be made to be selective for certain molecules over others. This is important for applications such as water purification and gas separation.
- Durability: Polymers are generally durable and can withstand the harsh conditions often encountered in membrane-based processes. This is important for long-term operation of the membrane.
- Cost-effectiveness: Polymers are relatively inexpensive to produce, which makes them a cost-effective option for membrane-based processes.
Challenges:
Despite the advantages of using polymers in membrane-based processes, there are also some challenges that need to be addressed. These challenges include:
- Membrane fouling: Membrane fouling occurs when foreign particles accumulate on the membrane surface, blocking the flow of molecules. This can lead to a decrease in the membrane’s performance over time.
- Membrane degradation: Membrane degradation occurs when the membrane material is damaged by exposure to harsh conditions, such as high temperatures or strong acids and bases. This can also lead to a decrease in the membrane’s performance over time.
- Membrane cost: While polymers are generally inexpensive to produce, the cost of fabricating a membrane can be high. This is due to the need for specialized equipment and the complex m… Read full answer