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Questions related from Muralishwara Kakunje
The intention is that data specific to a person should be entered/edited by only him/her. Others should not be able to edit or delete the data when online excel sheet is shared to everyone in an...
12 July 2023 1,632 1 View
Aren't wet steam, dry steam and superheated steam are all H20 ? Then why is it that superheated steam has lesser chances of corroding metals ?
01 February 2023 7,004 4 View
In tensile testing, how is percentage elongation at break which is measure of ductility is expressed as universally ? Is it (displacement/gage length)*100 or (change in length/gage length)*100 ?...
05 December 2022 4,603 2 View
What is the difference between voids and pores. When I want to study water absorption of a composite in order to predict the saturation water uptake I need free volume. Should I calculate just the...
05 May 2022 8,033 3 View
The lab I contacted, accept samples in powdered form. Since nanocomposite is bulk obtained from mold, should it be powdered as well ? While powdering will the porosity definition still hold since...
18 January 2022 6,377 3 View
What is thermal drift and what are its causes ? I did nanoindentation of a polymer nanocomposite. To know the thermal drift, at the end of unloading, low load of 0.01 mN was held constant for 70...
05 May 2021 3,095 4 View
I want to cut epoxy filled nanocomposite for FE-SEM analysis. What is the best way to cut it without resulting in any cracks or change in position or alignment of the particle reinforcement ? Also...
29 January 2021 7,257 5 View
According to Fick's law for short time, M_t/M_∞ =4/h √(Dt/π) Mt vs. square root of t is plotted and the slope is substituted in the above equation along with saturation water uptake (the...
12 January 2021 3,305 8 View
Does Epoxy clay nanocomposite sample require surface preparation. I am going for Gold sputtering to make the surface conductive. I guess there is no need to clean or polish the surface beneath the...
05 January 2021 2,112 8 View
Diffusion coefficient of filled polymers are experimentally determined by standard water immersion test (ASTM D570). This will enable us to determine percentage increase in weight with respect to...
16 November 2020 9,890 4 View
In polymer clay nanocomposites, researchers have studied water absorption by measuring the weight of specimen periodically when immersed in water. Diffusion coefficients are measured. How is...
30 October 2020 1,524 10 View
Can we use table salt to prepare 3.5 wt.% NaCl water solution for corrosion experiments. The 3.5 wt.% is to simulate sea water conditions. Researchers usually go with 3.5 wt.%.
23 October 2020 5,554 5 View
If I can limit the temperature build up during the ultrasonication process, can I increase the amplitude from 30 to 100 % and observe the changes in the prepared nanocomposite. Some people are of...
13 March 2020 2,600 3 View
In order to analyze epoxy neat and nanocomposite coatings in SEM, AFM, etc. I need free or free-standing films. How do I produce them? Basically, if I coat the epoxy nanocomposite on a substrate,...
18 December 2019 3,471 5 View
I found air bubbles in the cured epoxy coatings. I do not have a vacuum oven, vacuum pump, thinky mixer, etc. in order to remove the entrapped air. I came to know that there are bubble release...
12 December 2019 281 3 View
After preparing epoxy clay nanocomposite using the solution intercalation method, how can the solvent be removed? I do not have a vacuum oven, vacuum pump, degassing equipment, etc. Are there any...
30 November 2019 4,175 2 View
Application: to peel out epoxy coating from mild steel or glass substrate Basically I am going to apply epoxy coating on a substrate. But since I want to peel out the coating for further AFM/SEM...
21 November 2019 5,156 1 View
I have used LY 556 and HY 951 in a 10:1 ratio and cured at room temperature for one week. Has anyone determined the glass transition temperature for this combination when cured at room temperature?
12 October 2019 3,525 3 View
I used hardened steel film applicator to coat epoxy based coating on metal substrates. Due to improper quick cleaning techniques, now there are some left over cured epoxy stains. How do I remove...
30 September 2019 2,179 6 View
If I sonicate nanoclay epoxy mixture and don't use it for say 30 minutes, provided it is well below the pot life of epoxy and hardener, will it cause the deagglomerated and dispersed nanoclay to...
17 July 2019 9,355 2 View
I cannot coat a pin because it is too small. Can I coat a large specimen and use it as disc wherein pin would be the counter face.
12 February 2019 7,158 6 View
I bought nanoclay from a supplier for a cheap price. I checked the elemental composition in SEM-EDX facility. The results say that the weight percentage of silica is 20-30, alumina is 5-8, and...
24 October 2018 3,791 3 View
Epoxy nanocomposites can be prepared by solution casting method. In order to get rid of the solvents what could be done ?
11 September 2018 3,474 7 View
I have organic coating with a nano-material reinforced on to it. The coating thickness in dry condition is around 200 micrometer. Which hardness test among the following is best for research and...
21 August 2018 3,176 3 View
G65 − 16´1 is ASTM standard for measuring abrasion using dry sand/rubber wheel apparatus. The ASTM document says that it is used to determine resistance of metallic materials to scratching...
17 August 2018 9,885 1 View
Is the 3 body abrasion wear tester recommended only for metal specimen. Can it be used to test polymer nanocomposite coating applied over metal substrates ? The coating thickness would be under...
15 August 2018 161 0 View
I have Pin On disc abrasive tester in my institutes, but it cannot be used for a nanocomposite coatings of the order of 100 micrometer. Which are abrasive testers other than pin in disc ? Where...
11 August 2018 9,413 5 View
I have one output response, say surface hardness of metal matrix. In order to improve that say I incorporate hard particles. By conducting experiments assume that the ideal volume fraction for...
09 August 2018 1,055 18 View
When we select curing agent & clay surface modifier for epoxy nanocomposite, there are lot of options in front of us. There are certain researchers who have either experimented with surface...
04 December 2017 8,182 3 View
PTFE coatings are widely used in non stick pans. But it is noticed that when metal is used instead of wood for sauteing it wears out easily. Can the fracture and flaking of the coating layer be...
22 May 2017 6,846 3 View
When I set a load between 100 and 500 grams, I cannot see indentation diagonals clear enough. The diagonals just don't extend from one corner of the pyramid to another or maybe they are not...
01 January 1970 2,885 8 View
I want to disperse nanoclay in epoxy resin. I used 10 mL of the resin which has viscosity of 800 cps at 25 degree Celsius. I added nanoclay to it and probe sonicated at 36% amplitude for 20...
01 January 1970 8,845 3 View
Where do I find nano-indentation facility in South India (Karnataka Preferably) ? Better if the charges per hour are cheaper (say 500-1000 per hour).
01 January 1970 9,794 12 View
