Krafft point
E827086
The Krafft point is the characteristic temperature above which ionic surfactants become sufficiently soluble in water to form micelles, marking a sharp change in their solution behavior.
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
colloid chemistry concept
ⓘ
physical chemistry concept ⓘ |
| alsoKnownAs | Krafft temperature NERFINISHED ⓘ |
| appliesTo | ionic surfactants ⓘ |
| associatedWith |
absence of micelles below the Krafft temperature
ⓘ
precipitation of hydrated surfactant crystals below the Krafft temperature ⓘ sudden change in surface tension behavior above the Krafft temperature ⓘ sudden increase in conductivity above the Krafft temperature ⓘ |
| category |
phase behavior parameter
ⓘ
surfactant property ⓘ |
| characterizedBy | sharp increase in surfactant solubility with temperature ⓘ |
| contrastedWith | cloud point of nonionic surfactants ⓘ |
| definedAs | temperature above which an ionic surfactant becomes sufficiently soluble to form micelles ⓘ |
| dependsOn |
counterion type
ⓘ
ionic strength of solution ⓘ presence of additives ⓘ surfactant molecular structure ⓘ |
| field |
colloid and interface science
NERFINISHED
ⓘ
surfactant science ⓘ |
| hasConsequence |
determines temperature range of micellar solutions
ⓘ
limits the lowest temperature at which an ionic surfactant is effective ⓘ |
| importantFor |
ensuring surfactant solubility at use temperature
ⓘ
selection of surfactants for low-temperature applications ⓘ |
| influencedBy |
addition of electrolytes
ⓘ
headgroup charge density ⓘ hydrophobic chain length of surfactant ⓘ mixed surfactant systems ⓘ |
| marks | onset of micelle formation for ionic surfactants ⓘ |
| measuredIn |
Kelvin
NERFINISHED
ⓘ
degrees Celsius ⓘ |
| namedAfter | Friedrich Krafft NERFINISHED ⓘ |
| observedBy |
conductivity measurements
ⓘ
light scattering techniques ⓘ solubility measurements ⓘ surface tension measurements ⓘ |
| occursWhen | solubility of surfactant equals its critical micelle concentration ⓘ |
| relatedTo |
cloud point
ⓘ
critical micelle concentration ⓘ micellization ⓘ |
| temperatureRegionAbove | surfactant is soluble and forms micelles ⓘ |
| temperatureRegionBelow | surfactant is poorly soluble and often crystalline ⓘ |
| usedIn |
design of cleaning products
ⓘ
formulation of detergents ⓘ optimization of foaming and wetting properties ⓘ pharmaceutical formulations with ionic surfactants ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.