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cdru
Go Colts
Premium,MVM
join:2003-05-14
Fort Wayne, IN
kudos:7

2 recommendations

reply to VioletVenom

Re: Super hydrophobic coating product

said by VioletVenom:

The uses for this product seem unlimited and revolutionary, IF this product is for real (and not the next asbestos).

Hydrophobic coatings and substances aren't all that new. The hard part about them is to make them last long term without requiring additional coatings. The gloves in the video are an example where it looks cool at first, but use them for any length of time and the areas that do a lot of flexing (e.g. nuckles) or abrasions (e.g. palms) and the hydrophobicness wears off.

One example that was brought up was for HVAC coils, the defrost cycle could be eliminated greatly increasing the unit's SEER.

If a hydrophobic coating could greatly increase a unit's energy efficiency, it would have already been done. Maybe it wouldn't be with some uber-hydrophobic coating, but at least something. But it's not. Coils often go the opposite way, with hydrophillic coatings. Why? Because it helps keep the coatings clean. Water dropplets on a hydrophobic surface will bead up, while the same dropplets will sheet out and glide over the hydrophillic, washing away debris. Both will remove water faster than an uncoated surface.

Currently the "best" coating seems to be epoxy coatings that can have some hydrophillic properties, but also is more resistant to chemical corrosion especially organic acids that can cause formicary
corrosion as well as environments that normally would eat away untreated coils, such as salty air around oceans.


VioletVenom
Lets go Gators
Premium
join:2002-01-02
Gainesville, FL

Believe me, I'm not rushing out to buy any. You also bring up many valid points. To play devil's advocate here though. Back to the coils. What if this product surpasses its predecessors. If it does such a good job repelling water that water won't have a chance to stick to the coils?

I hear you on the longevity issue as well. Believe they address that as well discussing abrasion vs the coating, interior vs exterior application, etc.



cdru
Go Colts
Premium,MVM
join:2003-05-14
Fort Wayne, IN
kudos:7

1 recommendation

said by VioletVenom:

What if this product surpasses its predecessors. If it does such a good job repelling water that water won't have a chance to stick to the coils?

Just because it's a hydrophobic surfaces doesn't mean it won't freeze. Ask anyone who lives in the north who uses Rain-X if they still have to scrape frost on their windows. If the coils are cold enough, there's a chance that the droplets will still freeze, regardless if they are "sticking" to the coils. And once that starts, the accumulated ice will just grow and grow.

lutful
... of ideas
Premium
join:2005-06-16
Ottawa, ON
kudos:1

2 recommendations

reply to cdru

said by cdru:

said by VioletVenom:

The uses for this product seem unlimited and revolutionary, IF this product is for real (and not the next asbestos).

Hydrophobic coatings and substances aren't all that new. The hard part about them is to make them last long term without requiring additional coatings.

Hydrophobic coatings are often applied to antenna covers (radomes) to minimize snow/ice buildup. But that only works above -10C and eventually runs off and needs to be reapplied.

The only permanent solution is bonding a thick film with tiny hairs to the surface which mimic lotus leaf and other hydrophobic natural surfaces. They usually incorporate PFPE ( perflouropolyether ) or other Teflon like chemicals.