Does mesoporous silica NP dissolve in water?

Hi, guys. Recently, I was doing research on mesoporous silica. I used the traditional ingredient to synthesis it, namely TEOS, CTAB, ammounia aqueous, ethanol and water. To my surprise, when I...

06 July 2019 6,656 4 View

Does aggregation of nanoparticles have a strong effect on their specific surface area?

I've been doing adsorption of heavy metals using nanoparticles as adsorbant. Typically, there are two ways of adding the adsorbant(i.e. the nanoparticles). One is to add the suspension of...

08 September 2017 9,076 8 View

Why calcination doesn't destroy carbon backbone in making active carbon?

When we make active carbon with calcination method, we usually make the temperature as high as 600 degree C or higher. The carbon backbone structure maintained as a result. But why doesn't the C-C...

06 July 2017 836 3 View

How to fully hydrolyze PtBA into PAA?

I've been doing hydrolyze a PtBA polymer into PAA. I found there are many researchers doing this with TFA in DCM solution of PtBA. However, I tried this method for several times, the solution of...

08 September 2016 1,062 3 View

Does the mineral oil on NaH affect subsequent reactions?

I have been doing an end-group reaction of polymer. The former step of this is a substitution reaction using NaH(I used it directly without removal of the mineral oil). However, after many times...

07 August 2016 532 2 View

Why is the study of cyclic polymer not as heated as we expect?

These two decades, the synthetic strategy of cyclic polymer is heated studied. However, the applications of such polymer are not as much as people expect. Especially these years, the investigation...

07 August 2016 2,934 3 View

What is the lower limit of Mw that static light scattering can determinate ?

04 May 2016 6,813 4 View

How can I obtain a single peak(without slow mode) when measuring dilute polymer aqueous solution with DLS?

I ve been doing some experiment on PNIPAAM dilute aqueous solution. However, when measuring the size of each polymer molecue, the DLS result always shows two peaks, namely a fast mode and a slow...

01 February 2016 6,050 6 View

How long it will take for interpolymer complexes to reach their equilibrium state in dilute solution?

As we know, some certain pairs of polymers can form interpolymer complexes in solution which can be detected by scattering or other method. However, in preparing such samples(or change pH...

11 December 2015 3,014 1 View

Can micelles formed by block copolymer break up?

I have been doing some research on forming micelles that are formed by block copolymers. I want to know that if the concentration of the system get lower than cmc, will the micelles break up and...

10 November 2015 3,625 3 View

flexibility of polymers chain

effect of double bond on the flexibility of polymers

07 April 2021 0 0 View

Formulation of polymer color flakes

I am writing to request some information for making polymer color flakes. I would appreciate the help.

17 March 2021 0 0 View

Polymer composites suddenly solidifies?

I am making polymer composite by solvent mixing method. When I am trying to add filler solution in polymer solution it quickly get solidified. How to make them then uinform? It doesn't give time...

03 March 2021 7,540 4 View

What is the best way to keep an anaerobic chamber anoxic in the absence of hydrogen?

I'm a graduate student who works with an anaerobe, so I often work in an anaerobic chamber. I've been working on an assay that involves the steady-state of the quinone/ quinol pool. Anoxic...

03 March 2021 2,971 1 View

What techniques can I use to determine the miscibility of polymer blends?

The term miscibility refers to the single-phase state in thermodynamics. I do not mean the compatibility of different components. To determine the miscibility I know several techniques such as...

03 March 2021 4,107 4 View

How the parameters (such as Mw, Chemical bonds, polymer bland and so on) affect the mechanic property of polymer (such as storage, loss modulus) ?

Anyone can recommend any books on such topics? Thanks in advance.

02 March 2021 8,457 2 View

12% ledeburitic cold work tool steel, etched for revealing retained austenite, any help for clarifying?

Hello everyone. Given microstructure image belongs to a 12% ledeburitic cold work tool steel (annealed and tempered). The sample was etched with picral (100 mL ethanol and 4 g picric acid). I...

02 March 2021 4,119 3 View

How do I determine the degree of polymerization of PEG 400 based on NMR integration?

Hello, I am working on the photocatalytic degradation of PEG 400. I would like to know if it's possible to determine the degree on polymerization based on NMR integration, or by the MW of the...

02 March 2021 6,186 3 View

How to polymerize TEOS?

I want to polymerize TEOS on a surface. I know that NH4OH is a preferred catalyst and an alcoholic solvent should be used .But I can not find certain amounts of each material to use. Does any one...

02 March 2021 1,404 6 View

Why almost every element would be metallized in sufficiently high pressure and low temperature?

(This statement is from wikipedia, BTW). What is so special about metallic bond that is limiting high-P low-T state of a matter (as long as individual atoms exist, not white dwarf of neutron star...

02 March 2021 3,309 2 View