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The key difference between flocculation and deflocculation is that flocculation is the formation of flocs by the clumping of fine particles, whereas deflocculation is the dispersion of flocs to form a stable colloid. Flocculation refers to the formation of clumps from fine particles in a colloid.
What is meant by Deflocculation?
: to reduce or break up from a flocculent state : convert into very fine particles : disperse or maintain in a dispersed state.
What is flocculated and non flocculated suspension?
The suspension are said to be flocculated ,when the individual particles are in contact with each other and form a network like structure . Whereas in case of non-flocculated suspensions,the individual particles exists as a separate entity. In Non-flocculated suspensions The rate of sedimentation is slow.
Is Redisperse difficult?
The repulsive forces between individual particles allow them to slip past each other as they sediment. The slow rate of settling prevents the entrapment of liquid within the sediment, which thus becomes compacted and can be very difficult to redisperse.
How does vinegar affect clay?
The acidity of the vinegar breaks down the clay a bit, and makes it sticky. Some artists use vinegar straight from the bottle, or add vinegar to clay instead of water to make a joining slip. All these methods work to create a join that is stronger than water or slip alone.
What are Floccules in pharmacy?
Formulating Stable Suspensions Flocculating agents are electrolytes which carry an electrical charge opposite that of the net zeta potential of the suspended particles. Floccules have approximately the same size particles; therefore a clear boundary is seen when the particles settle.
Which suspension is more stable Flocculated or Deflocculated?
Most stable pharmaceutical suspensions are flocculated. In deflocculated suspension, individual particles are settling, so rate of sedimentation is slow which prevents entrapping of liquid medium which makes it difficult to re-disperse by agitation.
What sedimentation means?
Sedimentation is the tendency for particles in suspension to settle out of the fluid in which they are entrained and come to rest against a barrier. Settling is the falling of suspended particles through the liquid, whereas sedimentation is the termination of the settling process.
Which suspension is best?
The best front shock absorbers are the ones from the leaders in suspension.
- Bilstein B8 5100 Series Shock Absorbers.
- Skyjacker Hydro 7000 Shock Absorbers.
- Rancho RS9000XL Series Shock.
- Bilstein B6 Performance Shock Absorbers.
- Skyjacker Nitro 8000 Shock Absorbers.
- Eibach Pro-Truck Shocks.
- Fabtech FTS Shock Absorbers.
What’s the definition of bioavailability?
Bioavailability refers to the extent a substance or drug becomes completely available to its intended biological destination(s).
Why is flocculated suspension better?
The main difference between flocculated and deflocculated suspension is that the rate of sedimentation in a flocculated suspension is rapid whereas the rate of sedimentation in a deflocculated suspension is slow. The main causes of turbidity of water are fine particles, like suspended or colloidal particles.
Why suspension is formulated?
Suspension can improve chemical stability of certain drug. For example Procaine penicillin G. Drug in suspension exhibits higher rate of bioavailability than other dosage forms.
What are suspending agents?
: a substance (such as carrageenan, xanthan gum, or cellulose ether) that is added to fluids to promote particle suspension or dispersion and reduce sedimentation All these drinks can contain preservatives, and drinks other than juices can contain additives to colour, flavour and sweeten.
Is Vinegar a Deflocculant?
Vinegar is often used in ceramic slurries to change the viscosity (thicken it). While there are more effective flocculants (e.g. calcium chloride, epsom salts), vinegar is popular among potters simply because it is so available.
What is flocculation degree?
Flocculation is defined as the process by which fine particles, suspended in a liquid medium, form stable aggregates called flocs. The degree of flocculation can be defined mathematically as the number of particles in a system before floc- culation divided by the number of particles (flocs) after flocculation.
What are the features of flocculated suspension?
Differences between flocculated and deflocculated suspensions
| Flocculated suspensions | |
|---|---|
| 1. | The particles of dispersed phase aggregate and form a loose networklike structure. |
| 2. | Sedimentation rate is high. |
| 3. | Sediment formed is loosely packed and does not form a hard cake. |
| 4. | Sediment can be easily redispersed on shaking. |
Is Magma a coarse dispersion?
Dispersions containing particles of smaller size are termed fine dispersions (0.5 to 10 μm) colloidal range, Magmas and gels are fine dispersions .
How controlled flocculation is achieved?
Controlled flocculation (caused by additives): additive molecules cause the pigment particles to form a network; no direct pigment-pigment contact. Such “controlled” flocculates can be destroyed by low shear forces.
How does particle size affect stability of suspension?
In terms of stability, particle size has a direct effect on the ease of maintenance of a uniform suspended phase. However, for larger particles, the effect of gravity becomes significant, especially if there is a sizeable difference in density between the dispersed and continuous phases.
How can flocculation be prevented?
When particles of a suspension come close together they can form aggregates called flocculates which will settle more rapidly. To prevent that we often coat the particle with a charged surfactant. The charge (Zeta potential) acts to keep the particles separate and prevent flocculation.
Why do Flocculated particles not cake?
Repulsive forces between particles are overcome and a hard cake is formed which is difficult, if not impossible, to redisperse. The sediment is loosely packed and possesses a scaffold-like structure (large volume of final sediment). Particles do not bond tightly to each other and a hard, dense cake does not form.
Why are suspending agents used?
2. SUSPENDING AGENTS Suspending agents also called thickening agents are used to stabilize suspensions are hydrophilic colloid i.e. substances that spontaneously form colloidal dispersions with water because of an affinity between the dispersed particles and the dispersion medium.
Why does my clay smell?
When clay is stinky, though, it’s usually good, since that smell only comes when the clay has spent some time in the wet condition. If your clay stinks, that’s a good thing. It means there’s bacteria in it, living on the organic matter in it.
Is Epsom salts a Deflocculant?
Epsom salts are my flocculant of choice. To use Epsom salts as a flocculant, the salts need to be dissolved in water. This breaks up the bond between the magnesium and the sulphate so the magnesium ions are free to attach themselves to the clay particles.
What is the other name of Deflocculation?
What is another word for Deflocculation? flocculation. deflocculation and flocculation. coagulation.
