Asmaa Selim

6 Questions 16 Answers 0 Followers

Questions related from Asmaa Selim

How to peel off PDMS film from a glass petri dish without damaging it ??

I have prepared 15wt.% PDMS and poured it on a glass petri dish, then let it dry for 72 hr at room temp. after I tried to peel it and it doesn't work, so I am crosslinked in an oven for 3 hr , but...

27 July 2020 10,218 2 View

What is the best solvent for PVDF ?? Dimethyl sulphoxide or Dimethylacetamide??

For membrane preparation PVDF will be used , and I was wondering which solvent is the best for dissolving it, non-Toxic solvent , useful in dissolving other polymers such as PES, PDMS, Peba

06 July 2020 1,839 5 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...

09 December 2016 6,186 4 View

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

Preparing a pure PVA membrane by casting on glass substrate

23 November 2016 5,460 9 View

What will be the effect of blending a low concentration polymer to a high concentration polymer film ??

Will blending low concentration PVA to another high concentration, both have the same molecular weight, affect the swelling degree and hydrophilicity??

01 January 1970 4,035 2 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 8,619 3 View