x*******i
发帖数: 32 | 1 Hello Expert:
PVDF will become yellowish if it contacts with NaOH solution for a long time
. A deeper yellow will be obtained under high temperature, such as 90 degree
and five minutes. Any expert can explain? |
s*******h
发帖数: 3731 | 2 expert opinion normally costs a lot...
time
degree
【在 x*******i 的大作中提到】
: Hello Expert:
: PVDF will become yellowish if it contacts with NaOH solution for a long time
: . A deeper yellow will be obtained under high temperature, such as 90 degree
: and five minutes. Any expert can explain?
|
d********y
发帖数: 176 | 3 degradation, oxidation, chromophore formation |
c******x
发帖数: 438 | 4 I would guess it may be similar to the fluoroetch of PTFE, a common employed
technology for PTFE surface treatment. |
m********h
发帖数: 405 | 5 do you know what chemical in fluoroetch ?
employed
【在 c******x 的大作中提到】
: I would guess it may be similar to the fluoroetch of PTFE, a common employed
: technology for PTFE surface treatment.
|
c******x
发帖数: 438 | 6 Sodium metal complex, basically stripe F out of PTFE, the remaining PTFE can
undergo various recations such as free radical, oxidation etc. it's well
known and an established method in industry, google it you will find more
information if you have interest. However, this is a wet etch, not clean and
convenient compared to dry etch methods for PTFE such as plasma.
【在 m********h 的大作中提到】
: do you know what chemical in fluoroetch ?
:
: employed
|
