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Questions related from Tran Khanh
This is a diagram of an adsorption device with 2 adsorption columns, the input air is to the far left and the product is on the top right corner. Can someone tell me its working principle?
12 April 2020 2,035 0 View
I am currently researching electrospun Thermal Polyurethane, do you know any good solvent for this chemical, I tried Methyl Ethyl Ketone but after that, it gelled up in the needle, a very big...
01 January 1970 6,086 3 View
I am making PVDF solution for electrospinning, I only have DMF and acetone as solvents, so can you tell me the optimal conditions for this process? (ratio, temperature, time, stirring speed). Any...
01 January 1970 3,115 6 View
I am about to make a TENG with Polycaprolactone (PCL), the only problem that I am not sure about is if this material is very positive, like Nylon 66, cotton.. or very negative like PVDF, PDMS......
01 January 1970 9,943 2 View
I am doing experiments about oxidation process from limonene to limonene glycol, but the product are some limonene oxide (which I don’t want). These are the chemicals I have: -Catalyst: CuY...
01 January 1970 7,703 5 View
I have made Polystyrene electrospun fiber, it did not form a smooth surface and it always stick to my hand when I touched it, how can I make this fiber smoother and have higher durability.
01 January 1970 1,637 5 View
My TENG (PDMS-Copper) can fabricate about 24 Volts by 2.45 N at the frequency of nearly 1 Hz. However, the average current value is only about 100 nA. How can I increase the current, I only need...
01 January 1970 243 4 View
I read a paper, that said they had dissolved PS by putting 7.5wt% PS in 46.25wt% HFIP and 46.25wt% DMF, stirring overnight. Is that true? How can I dissolve PS for electrospinning?
01 January 1970 9,926 3 View
I am preparing PMMA for triboelectric nanogenerator. Therefore, I would like to know how to prepare this solution for spin coating. The avg. MW is 120 000 and I have some solvents, such as...
01 January 1970 920 1 View
I started the limonene oxidation process inside an autoclave at 150 Celsius Degree, TBHP as initiator, solvent: ethanol. However, the GC-MS showed the oligomerization of TiO2. As far as I know,...
01 January 1970 6,432 0 View
I am doing some experiments about the cross-link ability of polyurethane. First I cut a PU square into 2 halves. Then I stack half of each cut part on each other, apply some pressure on it by a...
01 January 1970 9,155 0 View
Would you kindly show me how to electrospin PDMS? I have never learnt about this technique, thank you.
01 January 1970 9,848 2 View
I made a TENG by PVDF and nylon 66, both have Al electrode and connect to the oscilloscope by Cu tapes. When I test the Voltage, it only shows 2 or 3 V. What did I do wrong? Can you give me some...
01 January 1970 9,240 0 View
I want to stick a PTFE membrane onto a piece of Al foil. I have Ag paste and I think it is a good conductive adhesion. How can I distribute the paste uniformly on the membrane and stick it firmly...
01 January 1970 5,914 6 View
Could someone help me with a suitable process with doping graphene? As I read from many papers, graphene needs to be ultrasonicated to eliminate the solvent (alcohol) before being doped into the...
01 January 1970 4,752 4 View
I have just bought a core-shell electrospinning system. Therefore could you provide me some simple examples to make core-shell fibers and to get used to the machine, especially fibrous polymers?...
01 January 1970 5,380 3 View
Can someone give me some parameters about the electrospinning process of the Nylon 6,6/Formic Acid solution? (concentration, flow rate, Voltage, etc.) I tried Nylon/Formic Acid 20wt% (4 grams...
01 January 1970 7,098 11 View
