sus2,3

Question 1

how does controlled fluctation work

Answer 1

use of suspending agent that is hydrophillic as a polymer that bind to particles and adsorbes on them it can bind to multiple particle till it form bridges that is critical concentration the ain is to go higher and cease bridging and cause particle seperation by hinderance

Question 2

what affects the ability of suspending agent

Answer 2

the affinity for the protein surface, charge, size and orientation of polymer.

Question 3

what is important about ionic surfectants

Answer 3

work same way as counterions but have to ensure not go over cmc or solubilisation will occure and also work by deffloculation and steric hinderance

Question 4

how do we delay caking

Answer 4

we can’t affect the density or gravity but we can affect particle size increase brownian motion and increase diffusion and increase free energy and less likely to cake and increase viscosity by use of suspending agent to decrease sedimentation rate

Question 5

rheological consideration

Answer 5

use of non-newtonian fluid with shear thinning properties with thixotherapy advantageous

Question 6

pseudoplastic

Answer 6

rest high viscosity to inhibit sendimentation

shaking move fluid allowing redispersion of any sediment

Question 7

plastic flow w thixotherapy

Answer 7

yield value at rest behave like a solid after yield viscosity reduces allowing redispersion thixo allows time to pour