40 Questions 77 Answers 0 Followers
Questions related from Farzane Besharat
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?
12 February 2019 1,552 4 View
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 7,140 4 View
I have 15% PES and 85% NMP. is correct to simply calculate the viscosity by the material contribution % regarding the relatively low amount of PES? I could not find the Mark-Houwink-Sakurada...
05 February 2018 5,177 1 View
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 January 2018 6,174 9 View
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
30 January 2018 3,678 2 View
I need to know about the conductivity of the GO I have bought from Sigma aldrich, it is edge oxidized, but it is not in the SDS. has any body measured for their tests? or the exact ratio of C/O?
30 January 2018 252 7 View
I cast PES- NMP film on glass but most of the times the solution starts to move from the edges to the center and i have to leave the film for some minutes in my specific applications but this...
14 December 2017 8,593 4 View
I need whole my film cast without defects and shrinks but about 0.5 cm on each side it shrinks inward... and I can not use wider substrate please advise
03 November 2017 7,114 4 View
I want to make a gold electrode through sputtering to get a very good, flat and smooth conductive electrode. but I do not know the condition of operation.... do you know what parameters are...
14 September 2017 651 6 View
please note that I want to find the proper power and time of ultrasonication (probe) for different concentrations of GO in NMP , to make sure of the dispersion stability with no sedimentation. thanks
08 September 2017 9,430 3 View
I want to have a good dispersion of graphene oxide (oxide on the edges) in NMP solvent to be stable and sustainable for a few days and not sediment ...the solution is dilute- what should the...
02 August 2017 6,696 5 View
what is responsible for carbonic particles alignment in solutions under electric field and how is it possible to find the amplitude and other features of the field?
21 July 2017 2,712 4 View
while membrane fabrication, I have to consider the width (not thickness) very narrow which results in shrink to some extent ... does that affect the pore structure inside the membrane ??
25 June 2017 4,533 6 View
I have to keep the membrane casting solution around 1 hour in air after casting before immersion inn coagulation bath. what happens if this time evaporation occurs? does it make any changes in the...
21 June 2017 5,102 5 View
I want to find GO (dispersed in NMP) dielectric constant / permittivity , under DC field of about 3.7 V/mm
07 May 2017 1,591 3 View
are saxs and TEM appropriate?
21 February 2017 2,783 3 View
I am trying to fix a wire on a steel plate as an electrode which is located in my solution (including NMP) ... I dont know if the silver paste would dissolve in my material
05 February 2017 2,107 2 View
I have a sulfonated polymer, NMP, acetone and TEA in my solution and GO was dispersed to some extent while mixing with stirrer but after ultrasonication with 300 w, in 10 minutes the whole GO...
14 January 2017 3,445 12 View
I need to electrodeposite a layer of PPy on SS substrate that is not brittle and can be detached easily...thanks in advance
08 December 2016 6,729 2 View
I want to know about the exact ways of synthesis control in order to figure out the influence of the method and other parameters on morphology, order of deposition (which one deposits first GO or...
05 November 2016 6,596 3 View
I have a 25 cc balloon which contains 10-12 cc pyrrole...(my whole material is 25 cc and we are limited for purchasing the material) I use a Platinum pump (JB) and the temperature is arround...
26 November 2015 1,027 5 View
I have a rust remover whose ingredients are not known but is claimed to be non destructive to the metal and removes only the iron oxide .... I know it probably have a chellating agent ...I want to...
23 November 2015 7,867 1 View
I know that longer time and higher monomer concentration (up to a limit) may increase the film thickness ....I need a film of 50 -100 microns thick film of PPy ...is that possible by...
21 November 2015 8,742 5 View
most of the procedures for making hydrophobic and oleophobic coatings for fabric are multi-step and mainly need ultrasonication... how to make them simpler for industral purposes for example by...
18 November 2015 7,323 4 View
I almost know about the nanoparticles used themselves but the most important part that is effective in removing only the rust and not to hurt the host metal is the chellating or any mediator that...
09 November 2015 3,284 3 View
nanoparticles suitable for fabrication of anti-scratch coatings for building stones and other surfaces ....also I want to know about the base polymers suitable for coating nanocomposite synthesis
21 October 2015 8,942 7 View
polymers like polypyrrole...I need a detailed procedure ...most of articles do not explain in detail I would be thankful if you coud advise me on some thesis about the subject. graphene...
05 October 2015 8,235 9 View
an ultrasonicator for dispersing nanoparticles in different organic and aqueous solutions with different viscousities and pH
07 September 2015 7,589 4 View
I want to know about traffic paints basic knowledge and important parameters they should have to guarantee longer stability...for example heat resistance, light reflection and ... . also I want to...
14 July 2015 633 6 View
I know about sol gel, hydothermal , mechanochemical methods...I want to know about the newest and high technology methods for tio2 nanoparticles and generally metal oxide nanoparticles
06 July 2015 515 3 View
In my samples TEM images, there are some aggregates of black nanoparticles mostly located on the edges and some of them are on the sheets...I guess they may be a little contaminants or may be...
10 June 2015 6,351 4 View
for a factory with 1200 m size and 5 m height that has a lot of windows all over the top part of the main space near the ceiling for example from 75% to 45%....please advise about a cheap and fast...
26 May 2015 1,601 9 View
in ASTM and ISO what pressure is the minimum pressure below which the test is failed
18 May 2015 5,479 6 View
when rust removers remove iron oxide from the corroded surface what are the reaction products that remain on the surface? I mean for the chelation reaction between the chelator ligand complex and...
12 May 2015 5,739 5 View
I should find a standard center to test inhalation injury and clinical toxicology of some nanosolutions, please advise. Thanks
04 May 2015 8,548 4 View
how can nanoparticles in a liquid media affect the lungs and respiration by inhalation? can they be harmful that way or such injury is caused only by the nanoparticles in the air? please advise...
27 April 2015 4,621 4 View
after adding KMnO4 it is dark brown and I had left it for 24 hours in order to complete oxidation ...but after I had diluted the solution with water and added H2O2 it turned to green instead of...
20 April 2015 634 11 View
When do we say a crystal that is dissolved into another one is a dopant? Is there any amount limit to name it that or it just should be a solution to specify the solute as a dopant? Infact I'm...
14 December 2013 7,816 10 View
Why is a solid solution's vapor pressure lower than a pure solid which causes it to become more stable so that it form before the pure one while cooling in Liquid State sintering? For example when...
14 December 2013 6,526 3 View
I am searching for a good topic involving CNT and graphene/graphene oxide for my PhD proposal. The field is so wide and complicated that I don't know where to start ! I'm interested in these...
05 October 2013 4,572 3 View
