18 Questions 16 Answers 0 Followers
Questions related from Fatima Ahmad
Can someone help me understand why cellulose acetate butyrate is more hydrophobic than cellulose acetate? I prepared nanofibers by electospinning of both polymers and both have initially the same...
04 August 2019 2,456 5 View
In the lit, several people have reported the potential of electrospun cellulose acetate mats as an adsorbent. I attempted to repeat this, I use the same MW, same solvent and spinning conditions,...
25 June 2019 7,795 0 View
Electrospun membranes appear to be increasingly popular for water treatment applications. I under how they are fabricated, etc but Im not quite how they are used, I would be grateful if someone...
08 February 2019 2,341 1 View
Recognize thermoset from FTIR?
23 November 2018 514 4 View
How to compare residue from TGA?
23 November 2018 7,056 8 View
I made some regenerated cellulose films which were characterized by XRD to study the crystallinity, scan speed used was 1.8°/min. The XRD pattern I obtained is not identical to what has previously...
13 July 2015 3,847 8 View
Hello, I am doing XRD and the only available sample holder is a glass holder, my sample is a thin film so I am getting a huge amorphous peak from glass as well. Is there anyway I can modify the...
20 June 2015 3,461 7 View
This is my first time dealing with XRD and I would like to calculate the crystallinity of my sample using powder XRD, I was trying to use the segals equation but I am not sure if its the right one...
08 May 2015 4,166 9 View
Couple of questions about crosslinking and its effect on mechanical properties.. 1) I understant that crosslinking results in bond forming between chains which decreases chain mobility hence...
20 April 2015 9,682 6 View
I have polyethyleneimene, it is in a 50% aq sol form. I have been trying to Electrospin but I dont seem to be getting any fibers, I've tried to add more water to it so as to decrease the viscosity...
17 April 2015 8,899 6 View
I have a ball mill that I use for grinding soil, in my absence someone tried to grind some aluminium powder in it and they didnt clean it very well and now the alumunium is stuck in it everywhere...
07 April 2015 7,166 4 View
I am quite new to FTIR and getting a little confused, I have some basic questions and would like to have some simple explanations for them ... To begin with I did FTIR for the same sample twice,...
24 March 2015 1,816 11 View
I need to dissolve cellulose in NMMO, lit. survey suggests that the simplest method to do is to dissolve it in NMMO, unfortunately detailed steps have not been mentioned anywhere, I have a few...
04 February 2015 2,698 3 View
1) What is the main reason behind GO having weak mechanical properties? 2) If GO is mechanically weak, how come some lit. report GO being used as a reinforcer to enhance mechanical properties? I...
01 February 2015 7,832 7 View
I would like to know if its possible to prepare a cellulose thin film by solvent casting, preferably using water as the medium of dispersion. If yes, what is the minimum amount of cellulose...
26 January 2015 8,916 3 View
I have been doing lit. survey on the above mentioned topic, particularly polymer membranes for water treatment and I have some questions... 1) If I understand correctly polymers consist of some...
18 January 2015 6,903 10 View
Hello all, I plan on preparing a water treatment membrane in which I would like to use GO along with a suitable polymer. My question is what different techniques can be used to prepare a...
01 January 2015 6,493 3 View
Hello, I am preparing GO using hummers method as follows: Briefly, 69 mL of concentrated H2SO4 was slowly added to a mixture of graphite powder (3 g, 1 wt equivalent) and NaNO3 (1.5 g, 0.5 wt...
24 December 2014 9,707 25 View
