How to interpret the surface roughness trend in PES/GO membrane?

adding graphene oxide / rGO / graphene have shown conflicting surface roughness changes in Polyethersulfone. for rGO in specific, why do we have roughness decrease whilst porosity has increased?

01 February 2019 9,601 5 View

Does Graphene oxide experience electrophoresis also in NMP ?

GO in NMP - considering NMP is not an electrilyte on itself, can the flakes move towards the opposite electrode?

08 September 2018 9,227 0 View

How to interpret the increase of water contact angle in polymer / graphene oxide ?

when the loadings of GO in the polymer increased the contacact angle was almost the same as the pure polymer and in one case higher... what can be the reason ... it is expected to have more...

04 May 2018 7,944 3 View

Why does my polymer solution tends to stick to the electrode while being imposed to electric field?

when I apply an electric field over my polymer solution it tries to move toward the negative electrode (the distance between the two electrodes is very low) this local movement is different every...

02 March 2018 9,968 4 View

Which side of the membrane is the top side?

while casting a carbon filler /polymer composite membrane on glass, during inversion in water , it gets up with a convex surface which is a little shiny. is this side the top surface of the...

01 February 2018 7,868 9 View

Why water does not reach to the edge of the blade while sectioning in ultramicrotome?

when i want to try thick sectioning of my sample, I fill in the tray with water bu even with angular and axial regulations and also filling and vacuuming water , it does not wet the upper part !...

31 December 2017 6,374 6 View

How to calculate the average viscosity and the dielectric constant of a solution of polymer?

I need to know the viscosity and dielectric of my solution. (polymer in a polar solvent)please advise if there is simple models or estimation techniques just to know an approximate estimation

31 December 2017 5,926 2 View

What are the techniques for adherence improvement between polymer thin film (water soluble ones) and metal surfaces?

I need to cover a metal surface with a thin layer of a water soluble polymer and this layer should adhere very well and not separate , also no-toxic ... what are the feasible methods?please...

31 December 2017 3,620 10 View

Is it possible to use membranes of diameter lower than 5 cm in Sterlitech setup?

my membranes are produced about 4.5 cm . is it possible to test them by a sterlitech HP4750 cell with some modifications of the setup?

11 December 2017 3,742 2 View

Should we ignore inertia force acting on nanparticles against viscose force in static fluid?

when we have nanoparticles in a polymeric solvent and it is not moving (hydrostatic), should we consider inertia for the particles negligible vs viscose forces? - and how would that be in case of...

08 September 2017 2,290 4 View

Why can't make aluminum nitride film successfully by use sputter?

We use reactive sputtering process to make aluminum nitride film, and want to make c-axis aluminum nitride film on a silicon substrate, but the crystal orientation cannot be seen with...

03 March 2021 7,975 3 View

What thickness need for ITO to use as conductive layer?

I want to do RF sputtering of ITO on glass substrate using magnetron sputtering. what thickness do i need to make it good conductive layer to use it for PSC. Moreover, whats about thickness of...

01 March 2021 395 3 View

Glass fiber content in a gypsum board ?

Any idea on how to get the volumic ratio of glass fiber in a gypsum board ? Thank you for your help !

01 March 2021 2,501 3 View

How to check the uv-vis absorption of nanoparticle by surface plasmon resonance?

I try to check the uv-vis absorption of Indium nanoparticle. Now I am measuring in solution, can I measure it in the form of a film?

01 March 2021 930 3 View

1 nm thick MgO thin-film to be deposited on Si wafer using thermal evaporation. What will be the optimum deposition conditions?

Favourable conditions of base pressure, rate of deposition. Also, by which characterisation technique to be used to verify the thickness of the deposited film.

28 February 2021 3,640 3 View

Concrete compressive strength databases?

I am looking for datasets similar to this one: http://archive.ics.uci.edu/ml/datasets/Concrete+Compressive+Strength I am looking for concretes with different types of aggregates (Recycled,...

27 February 2021 6,801 3 View

How to compare 2 samples recruited with different sampling methods?

If I want to compare characteristics of 2 groups of patients, one group is recruited from a random sample of the general public while another group is from a sample with a fixed gender (male to...

26 February 2021 3,526 3 View

How to prepare a thin polymer film by post-polymerization/crosslinking?

24 February 2021 2,362 5 View

How to properly calculate the fluid solid heat transfer between polypropylene matrix and glass fiber in a porous medium?

I'm building a cfx model of thermoplastic pultrusion process on ansys and i have a doubt on how is the proper way to set this parameter in a porous medium

24 February 2021 1,915 1 View

How to delaminate copper in water-based anodes?

Hello everyone, I'm looking for a way to delaminate copper current collector of water-based anodes in Li-ion batteries without damaging the graphite film. I tried different materials such as HNO3...

24 February 2021 3,785 3 View