Asmaa Selim

9 Questions 16 Answers 0 Followers

Questions related from Asmaa Selim

What is the effect of the number of alcohol C-atom on the swelling degree of PVA??

I am trying to study the swelling behavior of modified PVA films in different alcohol and organic solvent

02 February 2018 2,737 3 View

What is the difference between MMM, hybrid and nanocomposite membrane??

If nanoparicles in-situ generated in polymer mixture , will it be MMM or nanocomposite or hybrid membrane ??? And , if they just dispersed in the polymer matrix after synthesis , what will it be ??

12 December 2017 4,120 3 View

How to make a nanoparticles stable in mixed matrix membrane ??

I prepared PVA-Ag mmm, but when I do exp. the nanoparticles dissociated from the membrane ??

01 January 1970 9,132 6 View

I am preparing a 700 ml PVA solution , 10 % wt Should i heat it directly or through a water bath ?

What happened is the bottom of the beaker start to be burned and the solution is pale yellow color , Is it normal ?

01 January 1970 2,091 4 View

How to cast a polymer on commercial porous membrane without filling the pores?

I am trying to cast PVA polymer on UF microporous membrane , but the PVA is filling the porous and that affect on the membrane properties

01 January 1970 5,576 5 View

Can the DN membranes prepared from the same polymer solution ??? and can be done with casting or should be soaked ?

In the sequential method for preparing a double- network membranes, the second network will be created in the presence of the first one Can both network be from the same polymer solution ??

01 January 1970 5,859 1 View

How to peel of a membrane from a glass substrate without damaging it ?

Preparing a pure PVA membrane by casting on glass substrate

01 January 1970 9,703 10 View

Why is the preparation of composite nanofiltration membrane using PVA as the selective layer using a casting knife not reproducible?

I am trying to prepare a composite membrane PVA/PAN Using 10% PVA solution , PAN UF membrane , coagulation solution 10% NaOH, Crosslinking with GA solution " GA+Sulfuric acid + acetone" The PVA...

01 January 1970 612 4 View

Are the silver nanoparticles stable in ethanol ???

During the pervaporation process using PVA-AgNPs membrane, after the 2nd exp. the silver nanoparticles dissolved in the solution

01 January 1970 6,051 5 View