Jw Heo

8 Questions 1 Answers 0 Followers

Questions related from Jw Heo

How long do you grind functionalized graphene oxide using mortar and pestle to make it powder form?

I did an experiment of making functionalized graphene oxide and dried it in a vacuum oven after centrifugation, and ground f-GO using mortar and pestle. But, after grinding, it still didn't...

11 November 2019 7,025 3 View

Graphene and functional graphene have different particle sizes, but is it okay to make a nanocomposite and compare it at the same concentration?

I did an experiment of making functionalized graphene oxide and dried it in a vacuum oven, and ground f-GO using mortar and pestle. After that, I will make two types of nanocomposites...

11 November 2019 7,243 5 View

How can I distinguish Ester bond from -COOH in FT-IR?

I synthesized a silica-functionalized graphene through esterification. I found an ester peak(~1735 cm-1) in the functionalized GO, however, I also found the same peak in the original GO. Then,...

09 September 2019 1,265 3 View

How do you determine the proper amount of material when you try to functionalize Graphene Oxide a lot at once?

I want to functionalize graphene oxide using esterification. When I searched the papers about this kind of reaction, I found that many authors synthesized ~100 mg of graphene oxide. However, I...

08 August 2019 2,200 3 View

How can apply the grafting method on carbon fiber to other carbon material?

I found a paper about grafting silica nanomaterial to carbon fiber. Shortly, 1) CF-COOH is made. 2) With a reflux reaction (at 50C, 4h), CF-COOH reacts with solvent including silica nanomaterial....

06 June 2019 205 3 View

How can I dry a functionalized graphene oxide in a vacuum oven after centrifugation properly?

I want to know the procedure of drying a functionalized graphnee oxide in a vacuum oven after centrifugation.. I don't have a freeze-dryer, so I try to dry it using the vacuum oven. However, the...

06 June 2019 2,756 3 View

Can I apply the grafting technique to other material (ex. carbon fiber -> CNT)??

For example, I read a paper about 'grafting A(as nano particle) onto carbon fiber' Can I apply this technology to grafting A onto carbon nanotube? I need your advice.. thank you

03 March 2019 2,925 2 View

I want to synthesize the compatibilizer of PPS, especially PPS-COOH?

I want to synthesize the compatibilizer of PPS for extrusion, especially PPS-COOH or other PPS derivatives . I found a research paper where PPS-COOH is made by using 'high pressure reactor' Is...

02 February 2019 4,878 2 View