Hello everyone,
Greetings!
I would appreciate any guide about etchant for modifying polymer film surface.
I like to modify surface roughness (random) of poly(vinyl alcohol) films. I was wondering if there is any wet(chemicals like strong acid or base) or dry (plasma or ion beam) etching...
Dear colleagues,
I got few questions and would appreciate your reply
For the UNIQUAC model
Water parmeters (1):
r= 0.92 and q = 1.14, q'=1.4
ethylene glycol parmeters (2)
r = 2.4088 and q = 2.2488, q'=0.4761 (could anybody confirm?)
I need to find the the binary parmeters (a12 and a21) at...
What is the difference between surface energy and surface free energy, in terms of physics?
I found surface energy of a solid sometimes refers to the surface tension and they have equivalent units.
However, I am confused about surface free energy....any help would be appreciated. Thanks.
I am little confused about sorption process in pervaporation. Is "Sorption= Adsorption + Absorption" ?
In dehydration process, if water molecules attach to the surface by adsorption then how they enter the polymer matrix or network (by absorption or solutbility effect)?
Also what is the...
I am looking for commercial Polyvinyl Alcohol (PVA) membranes only for my research. Can you help me to find any company where I can get/buy it.
I've talked with some companies (e.g. VWR, Sulzer, Koch etc) but they are interested in selling whole separation unit and not the membranes only.
