I am dissolving PEG 20,000 in DW, after that casting in glass petridish. But the formed films are very brittle and very difficult to peel out from petridish. Please suggest me how to make micron thickness PEG films?
Hi,
what are the surfactants and placticizers used in formulation?
what temperature are maintaining for dissolving polymer.
better go vacuum drying.
You're literally just dissolving the PEG in water, spreading it out in a glass dish, letting the water evaporate, and then peeling it off the glass, correct? What's your target thickness?
Initial suggestions:
1. Cast the PEG on some kind of fluorinated film instead of the bottom of the glass dish. You could either (a) line the glass dish with a PTFE film, or (b) make a 'boat' of PTFE or PFA film by folding up the edges of the film. Then, cast the PEG on that. Once the film is dried, you can lift the film up and try peeling the PEG off. This will be more controlled than trying to scrape it out of a dish, and also PEG will stick less well to the fluorinated material.
2. Spin coat the PEG directly on to the surface you want the film to be on. This is likely to give you nicer films.
3. Experiment with the amount of PEG in your solution, drying times and temperature, etc. PEG has solubility in methanol/water or ethanol/water mixtures, if you want to bring the drying time down.
Have fun!
- Badges
- Science topic
- Similar topics
- Physical Sciences
- Materials Science
- Materials
- Inorganic Materials
- Ceramics
- Glass