Hello,
I would like to spin coat PDMS onto a porous membrane to use as a gutter layer. However, I cannot seem to find any references on how to do so. I need to know what kind of PDMS to buy and what solvent needs to be used. Thank you,
Hello, I am creating a GO/polymer scaffold using a 2/100 ratio in a THF suspension (the polymer is soluble). I would then spin coat it onto a porous support. The membranes show reasonable...
31 December 2019 9,063 4 View
Hello, I am trying to spin coat a few layers of monomer solution in THF onto a porous support. What would be the best procedure to do so? Intuitively, it seems that every new coating would...
10 November 2019 3,777 4 View
hello, I am trying to separate a star shaped siloxane polymer from starting material using column with some luck. Using 70/30 hexane/EA, I can get my product but with a few problems: 1- The...
06 July 2019 9,064 3 View
Hello, I am trying to purify a reaction product of hydrosilylation with a styrene compound using Karstedt's catalyst. However, it seems to be cumbersome for the following reason. After...
03 April 2019 2,628 1 View
Hello, I am spin coating a non-polar monomer onto a PDMS layer, with the coating solution made up of chloroform. The concentration is very low. However, I keep getting a hole in the middle of the...
10 November 2018 4,903 0 View
Hello, I am using phase inversion to make EVOH membranes, using DMSO as a solvent and ethanol as a non-solvent. When the membrane is wet it is flexible and stretchable. However, once I dry it in...
10 November 2018 1,756 0 View
Hello, I have been trying to spin coat a layer of PDMS (Slygard 184) onto LDPE. My problem is that with Toluene, I get the Marangoni effect, where I get small circular spots of PDMS onto LDPE...
10 November 2018 9,578 4 View
Hello, I have tried to create LDPE membranes using phase inversion but the result was a get-like, nonuniform membrane. The problem I think, is that LDPE can only dissolve in xylene at high...
09 October 2018 5,735 0 View
Hello, I am using Sylgard 184 crosslinked PDMS for composite membranes to test for air permeability. when I thermally crosslink it to test the permeability I get a value that is 50x less than...
09 October 2018 1,591 0 View
Hello, I have been looking for references regarding this matter. I am trying to spin coat a polymer onto a PDMS substrate. The best solvent I can use is chloroform. However, it strongly swells...
09 October 2018 1,254 0 View
How can I determine a good adhesion strength range for coatings on polymer surfaces, such as DLC on polymer substrates? Is there a specific threshold for adhesion strength (from T-peel tests)...
10 August 2024 942 3 View
I did PR spin coating on trench structure. I used AZ P4620 PR and the thickness or PR is around 11um. The substrate is Si. And my trench structure depth is 141um(negative way). Even though I...
08 August 2024 2,298 0 View
I need to do some experiment with it in liquid form.
07 August 2024 613 3 View
I have been getting a low plasma and no coating while doing rf sputtering of copper doped ZnS using a power of 140 watts and at pressure of 6.5x10-3 Mb.
07 August 2024 4,526 4 View
I work on MCF7 cell cell for anticaner purpose and I wa to do drug preperation the drug ( secondary metabolites extracted from Aspergillus) My question which solvent is better with these secodary...
03 August 2024 4,725 2 View
I am currently using CASTEP version 2020. When I want to run optical properties calculations with spin-orbit coupling(SOC), I encounter the following error in a pop-up window before the job gets...
02 August 2024 2,890 0 View
Hello everyone, I need to dissolve stigmasterol for an animal experiment, but it hasn't dissolved in either DMSO or vegetable oil. Can anyone recommend the best solvent for stigmasterol?
01 August 2024 7,504 2 View
I am trying to coat my micelles and PLGA based nanoparticles with cell membrane using an Avanti mini extruder according to literature . I use 200nm membrane but my particles end up to be 400nm And...
30 July 2024 3,294 3 View
Does it exist some special technique for cutting ceramic membranes for Cross-sectional FESEM or SEM images?
25 July 2024 5,482 2 View
In the context of Electron Spin Resonance (ESR) spectroscopy, under what conditions is an absorption spectrum considered to be a single absorption spectrum?
25 July 2024 2,325 1 View