Antonio Alves

4 Questions 2 Answers 0 Followers

Questions related from Antonio Alves

Is there a general model for the concentration dependency of viscosity in polyelectrolyte solutions?

I'm currently working with lignin solutions in sodium hydroxyde and I've collected data on the solutions' viscosity at different NaOH and lignin concentration. The viscosity seems to be correlated...

21 August 2024 1,174 2 View

How to avoid shrinkage on alginate films?

I'm currently making calcium alginate films by solvent casting followed by imersion in CaCl2 solutions. After the imersion, while drying the films, they start shrinking and getting the form of a...

20 December 2023 4,766 4 View

Do chemical and physical properties influence on the size of a polymer particle?

I would like to know if the properties of a polymer impact on the size of the particle it forms. I'm working with different polyssacharides (alginic acid from different seaweed), which are...

30 December 2020 7,783 6 View

Which acids can I use that are insoluble in DMF and in most of the polar aprotic solvents?

I'm in need for an acid that is practically insoluble in most of aprotic polar solvents for a reaction (particularly DMF). Its salt form should, though, present some solubility in these solvents...

31 March 2020 3,858 3 View