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dNF120 - Coggle Diagram
dNF120
HOW
controlling the buildup of PEM
ionic strength
changing salt concentration
low (5-50 mM)
charges of adsorbed PE are compensated by the charges of adsorbing PE (intrinsic)
low ionic strength, thin/dense layers, linear grow pattern
high (>50 mM)
counterions will start to compensate the charges of PE in a higher amount (extrinsic)
high ionic strength, thick/open layers, non-linear grow pattern
type of salt
temperature
pH
type of PE
PSS/PAH
20-30% swelling
PSS terminated layers is more swollen
PSS/PDADMAC
30-40% swelling
PDADMAC terminated, low permeability
PSS terminated high permeability
MW
fabrication method
number of layers
Increasing selecivity
densifying the PEM
decrease the degree of swelling
increase the crosslink density
changing the PEs
chemically crosslinking the multilayers
WHAT
PEM density
PEM swelling
WHY
increasing demand
Food industry
WHEN
asap
WHO
Dennis
Wisnu