What is an example of amphiphilic?

The most common examples of amphiphilic chemicals are soaps, detergants and surfactants [1,2]. Their special structures lead to relatively high solubility in both polar solvents like water and a large variety of nonpolar solvents. Amphiphilic molecules may form aggregates or micelles in water.

What are amphiphilic colloids?

O Also called as amphiphilic colloids. O Certain molecules or ions, termed amphiphiles or. surface-active agents, are characterized by having. two distinct regions of opposing solution affinities (hydrophilic and hydrophobic) within the same molecule or ion.

What are amphiphilic lipids?

All of the lipid molecules in cell membranes are amphipathic (or amphiphilic)—that is, they have a hydrophilic (“water-loving”) or polar end and a hydrophobic (“water-fearing”) or nonpolar end. The most abundant membrane lipids are the phospholipids. These have a polar head group and two hydrophobic hydrocarbon tails.

What macromolecules are amphiphilic?

Examples of macromolecules with amphiphilic groups: (1) sulfonated polystyrene, (2) poly-1-vinylimidazole, (3) fragment of Nafion chain, (4) fragment of polypeptide chain. Polymers containing ionogenic groups like –SO 3 H are called ionomers.

How are hydrophilic or lyophobic colloidal solutions prepared?

Such processes are used in the preparation of colloidal silica or gold. Hydrophilic or Lyophobic colloidal solutions can be prepared by various chemical techniques such as: Double Decomposition Technique: When hydrogen sulphide is passed through a solution of arsenious oxide in distilled water, we get a colloidal solution of arsenious chloride.

How is arsenious sulphide prepared as a colloid?

Arsenious sulphide, As 2 S 3 is a lyophobic colloid. It is obtained by the hydrolysis of arsenious oxide (AS 2 0 3) with boiling distilled water, followed by passing H 2 S gas through solution obtained. In the colloidal solution of arsenious sulphide, each particle is surrounded by HS- ions, produced by the dissociation of H 2 S.

How are colloids prepared in the dispersion method?

Dispersion methods: In the dispersion method particle of larger size are broken down to the colloidal size in the dispersion medium. Starting with the material in massive form, a colloidal solution is prepared by using suitable devices to disintegrate it into particles of colloidal size. Normally this is carried out by physical methods.

Which is the best way to prepare a colloid?

Let us explore more these techniques for Preparation of Colloids. However, there are two principal ways of preparation of colloids: Dispersion of large particles or droplets to the colloidal dimensions by milling, spraying, or application of shear (e.g. shaking, mixing, or high shear mixing).