#qi-hardware IRC log for Sunday, 2016-05-22

wpwraknice to have products in your household where they print the LD50 on the package ;-)05:23
wpwrakat least better than the blast radius, i guess05:23
whitequarkgood bunch of those too07:05
wpwraknote to experimental cosmologists: please declare any experiments with a blast radius exceeding 1 gigaparsec before the competent authorities07:33
DocScrutinizer05well, on that glue they don't. I googled and got that security asessment for the substance12:00
DocScrutinizer05seems to me that stuff cures with water just like cyanoacrylat does12:02
DocScrutinizer05way slower though, plus I dunno but when it's diluted enough in water, aiui it doesn't build polymeres anymore, which seems to suggest you can rinse it off with lots of water until it cures and then it's water resistent12:05
arossdotmeknwo of any small/action camera sized 1080p or maybe even 2k+ :) cameras are there that are floss and maybe even copyleft hardware? diy 1080p webcam+tiny computer? 20:26
arossdotmeneo900 :) heh? 20:27
whitequarkDocScrutinizer05: that glue is based on an alkoxysilane20:45
DocScrutinizer05when that's the generic term for N-(3-(Trimethoxysilyl)propyl)ethylendiamin20:47
whitequarkthe mechanism is that hydrolysis produces silanols, which condenses with other silanols. when you dilute them, the result is that you get lower molecular weight polymers20:47
whitequarkoh noticed that you wrote that20:47
whitequarkI figure you don't need to *wash* it with water, just wait until it cures entirely20:48
DocScrutinizer05nah, I thought it was water soluble until cured. It's rather not20:48
whitequarkWater solubility 1e-06 mg/l20:49
whitequark1ng/l? hard to get less water soluble20:49
DocScrutinizer05sounds odd20:49
DocScrutinizer05even diamant is that 'soluble' in water ;-)20:50
DocScrutinizer05nanogram, ohmy20:51
DocScrutinizer05given the complexity of the molecule, it can't be many of them to make one nanogram20:52
whitequark"estimated; value may be inaccurate because material is hydrolyzed"20:52
DocScrutinizer05yeah, they define "soluble" as "how much of the original substance can be found in a certain amount of slovent"20:54
DocScrutinizer05I'm rather interested in "how much of the existing material will vanish over time when treated with a certain amount of solvent"20:54
whitequarkpolysiloxanes are highly insoluble in water20:56
DocScrutinizer05yes, but the uncured glue is no POLYsiloxane aiui, no?20:57
DocScrutinizer05it polymerizes with water, and by slitting of methyl froups20:58
DocScrutinizer05it polymerizes with water, and by splitting off methylene 20:59
DocScrutinizer05with too much water the polymer chains are short20:59
DocScrutinizer05thus not creating a decent glue effect21:00
whitequarkI don't understand the precise conditions you are speaking of21:00
DocScrutinizer05I speak of rinsing uncured glue with water21:00
whitequarkif you mean just "dump glue into water" then it will be so dependent on minute details that you can't make any prediction21:00
whitequarke.g. the rate of surface area to volume is the major one21:01
--- Mon May 23 201600:00

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