- #1
taylaron
Gold Member
- 397
- 1
Greetings everyone,
I'm constructing a ferrofluid display cell using FerroTech EFH1 ferrofluid inside of a round bottom pyrex beaker. The ferrofluid is oil based, so it is not hydrophilic. The liquid that the ferrofluid will be suspended in is Magnesium Citrate (a household laxative... and no, i did not have this on hand!)
I've attached photos of my round bottom beaker filled with Magnesium Citrate (clear fluid) with about 15ml of black ferrofluid. Unforunately the ferrofluid has stuck to the surface of the glass. My suspicion is the ~10 nm size iron oxide particles are clinging to the imperfections in the glass. As you can see in the picture, this clinging action is unacceptable.
The best solution I've come up with involves finding and purchasing some kind of surface coating that I can apply to the inside of my beaker. The coating would need to be hydrophilic (not hydrophobic since the ferrofluid is oil based and it will completely coat the surface brown).
I need some help or advise on where I can find a hydrophilic surface coating that doesn't require baking my jar at some absurd temperature like 400 degrees Celsius. I've done some research and the compounds I've found that are used commercially utilize either titanium dioxide or silicon dioxide
info:
Superhydrophilicty: http://en.wikipedia.org/wiki/Super_hydrophilicity
The best, or closest commercial product that might work is a window defogger. The last link says they're used in defogging windows. I'm going to try that out.
Can anybody offer a better solution?
Regards,
-Tay
I'm constructing a ferrofluid display cell using FerroTech EFH1 ferrofluid inside of a round bottom pyrex beaker. The ferrofluid is oil based, so it is not hydrophilic. The liquid that the ferrofluid will be suspended in is Magnesium Citrate (a household laxative... and no, i did not have this on hand!)
I've attached photos of my round bottom beaker filled with Magnesium Citrate (clear fluid) with about 15ml of black ferrofluid. Unforunately the ferrofluid has stuck to the surface of the glass. My suspicion is the ~10 nm size iron oxide particles are clinging to the imperfections in the glass. As you can see in the picture, this clinging action is unacceptable.
The best solution I've come up with involves finding and purchasing some kind of surface coating that I can apply to the inside of my beaker. The coating would need to be hydrophilic (not hydrophobic since the ferrofluid is oil based and it will completely coat the surface brown).
I need some help or advise on where I can find a hydrophilic surface coating that doesn't require baking my jar at some absurd temperature like 400 degrees Celsius. I've done some research and the compounds I've found that are used commercially utilize either titanium dioxide or silicon dioxide
info:
- titanium dioxide: http://www.gotowti.com/Hydrophilic-Glass.htm
- Silicone dioxide: http://www.toolbase.org/Technology-Inventory/Windows/high-performance-glass product name: LoE2
Superhydrophilicty: http://en.wikipedia.org/wiki/Super_hydrophilicity
The best, or closest commercial product that might work is a window defogger. The last link says they're used in defogging windows. I'm going to try that out.
Can anybody offer a better solution?
Regards,
-Tay
Attachments
Last edited by a moderator: