Hacker News Board Hacker News, browsed like a classic message board
Live data from Hacker News

Glue bonds to nonstick surfaces and wipes clean with ethanol

cen.acs.org

Post reply on HN
Print view View original

81–90 of 112 posts

Re: Glue bonds to nonstick surfaces and wipes clean with ethanol

#81

Post by DivingForGold »

Budding armchair polymer chemists: The article specifically states this adhesive works by way of flourine-flourine bonds (found in PFAS and flourocarbon materials).

It does not indicate that it can bond other very low or low polarity polymers, the most common being polypropylene and polyethylene, which there is no known adhesive that will bond strongly to those two polymers, arguably these 2 are much more common than flourocarbons.

The cyanoacrylate "claimed" solutions for polypropylene and polyethylene are very weak.

Re: Glue bonds to nonstick surfaces and wipes clean with ethanol

#82

Post by lazide »

throwway120385 wrote: post #68
quickthrowman wrote: post #64

Earlier quoted context omitted.

PTFE is perfectly safe as long as you don’t get it too hot. So, not the best material for non-stick pans. The thread tape on all non-compression screw-type plumbing fittings is made of PTFE, and so is Gore-Tex. I’m well aware of the danger of PFAS, my local watershed is contaminated with it from a 3M plant.

You can use pipe dope instead of PTFE if you want. It's just more expensive.

Most pipe dope is made with PTFE now.

Re: Glue bonds to nonstick surfaces and wipes clean with ethanol

#83

Post by NonHyloMorph »

murderfs wrote: post #20

> “Since ethanol is the main component of hand sanitizer, we believe it is possible to de-bond and recycle the adhesive by using hand sanitizer as a substitute in certain real-world situations,” Aida says. These sorts of environmental impact blurbs are hilarious. What kind of scenario are they envisioning where someone wants to remove and reuse a specialized adhesive bonding PTFE parts to something, but don't have et…

I read it as "specifically for ptfe" too. Where would you glue that? (Heart surgery?)

Re: Glue bonds to nonstick surfaces and wipes clean with ethanol

#84

Post by s0rce »

danbruc wrote: post #61
SV_BubbleTime wrote: post #59

Earlier quoted context omitted.

Also… Uncure is a popular brand of cyanoacrylate remover. This is already a solved problem it seems.

Never heard that name, but according to their safety data sheet [1] it is 95+ % dimethylformamide [2]. Not too different from acetone, with a additional dimethylamin group. Acetone-free nail polish remover usually contains primarily ethyl acetate [3] which is also structurally similar. [1] https://bsi-inc.com/sds_pdf/sds_un_cure.pdf [2] https://en.wikipedia.org/wiki/Dimethylformamide [3] https://en.wikipedia.org/wiki…

I've always heard of using nitromethane to remove super glue...

Re: Glue bonds to nonstick surfaces and wipes clean with ethanol

#85

Post by s0rce »

SV_BubbleTime wrote: post #74
danbruc wrote: post #61

Earlier quoted context omitted.

Never heard that name, but according to their safety data sheet [1] it is 95+ % dimethylformamide [2]. Not too different from acetone, with a additional dimethylamin group. Acetone-free nail polish remover usually contains primarily ethyl acetate [3] which is also structurally similar. [1] https://bsi-inc.com/sds_pdf/sds_un_cure.pdf [2] https://en.wikipedia.org/wiki/Dimethylformamide [3] https://en.wikipedia.org/wiki…

It must be extremely low vapor pressure compared to acetone. Little smell and not an ultra airtight lid. Lasts forever.

yes, DMF has a much higher boiling point. Its much more polar.

Re: Glue bonds to nonstick surfaces and wipes clean with ethanol

#86

Post by aaron695 »

murderfs wrote: post #20

> “Since ethanol is the main component of hand sanitizer, we believe it is possible to de-bond and recycle the adhesive by using hand sanitizer as a substitute in certain real-world situations,” Aida says. These sorts of environmental impact blurbs are hilarious. What kind of scenario are they envisioning where someone wants to remove and reuse a specialized adhesive bonding PTFE parts to something, but don't have et…

[dead]

Re: Glue bonds to nonstick surfaces and wipes clean with ethanol

#87

Post by conorcleary »

markdown wrote: post #78
SV_BubbleTime wrote: post #60

Earlier quoted context omitted.

Dude, people in 2026 still think duct tape is a “great product”. It’s pretty clear people have no fucking clue what makes a good adhesive. I’ll settle for just not seeing duct tape in the 10,000 places it doesn’t belong!!

Hey what do you use in place of duct tape?

TuckTape

Re: Glue bonds to nonstick surfaces and wipes clean with ethanol

#88

Post by culi »

galangalalgol wrote: post #62
culi wrote: post #54

Earlier quoted context omitted.

Non-stick pans are fine if they are never heated above 500°F (260°C) and never scratched. In general, you probably shouldn't regularly use a nonstick pan for longer than 2 years. If it is scratched or heated above what it says on the label, then yes it is absolutely toxic.

Why is scratched a problem? They use the same stuff in medical implants. It is chemically inert if you don't overheat it right?

A single scratch on a pan is enough to release thousands to millions of PTFE particles and microplastic particles. Scratched pans also significantly lowers the PFAS thermal stability which means even low temperatures can be overheating

And if the scratch is deep enough, you could also be exposing the underlying fluoropolymer coating which contains chemical binding glues which are definitely not foodsafe

Also modern replacements like GenX and PFOA are dangerous because they are not inert

Re: Glue bonds to nonstick surfaces and wipes clean with ethanol

#89

Post by culi »

pastage wrote: post #53
culi wrote: post #52

There's an endless stream of non-stick pans in Goodwills. I feel bad for the people that don't know better and buy used non-stick pans and I also feed bad about the sheer amount of waste being generated. It would be incredible if this could be used to get rid of scratched up or otherwise unsafe non-stick coatings to the point that the pan is still food safe

delete EDIT 2: I think they are non-toxic and inert. But I tried to find my source for this and I am failing badly. so deleting this comment EDIT: I agree they are very waste full since they do not live that long. I have owned three non-stick pans, my cast iron pans have outlived all of them by decades.

Old school teflon is inert at low temperatures but when you scratch it, it's thermal stability is drastically lowered. Even low temperatures can be dangerous.

Also most pans nowadays have phased that out and use PFOA or GenX which are absolutely not inert.

Re: Glue bonds to nonstick surfaces and wipes clean with ethanol

#90

Post by jojobas »

gizmo686 wrote: post #31
murderfs wrote: post #20

> “Since ethanol is the main component of hand sanitizer, we believe it is possible to de-bond and recycle the adhesive by using hand sanitizer as a substitute in certain real-world situations,” Aida says. These sorts of environmental impact blurbs are hilarious. What kind of scenario are they envisioning where someone wants to remove and reuse a specialized adhesive bonding PTFE parts to something, but don't have et…

Who says this will be a specialized adhesive? If it works as advertised, it could be a super-glue alternative with easy unglueability. That would be an attractive consumer product; and the type of product that could easily end up on someones hands.

A 1L bottle of denaturate is cheaper than 200ml bottle of hand sanitizer where I live.
Post reply on HN