peptization
Definition
Noun: 1. The process of converting a substance into a sol; the act of bringing a precipitate into a colloidal solution. This is a specific chemical process where aggregated particles are broken down into smaller, individual particles that remain dispersed in a liquid, forming a stable colloidal system.
Usage
- Peptization is a technical term used primarily in chemistry, colloid science, and materials science.
- It describes the deliberate dispersion of a solid (often a freshly formed precipitate) into colloidal-sized particles using a peptizing agent (like an electrolyte or surfactant).
- The term is typically used in passive constructions (e.g., "the peptization of...") or to name the process itself.
Examples
- The peptization of the clay suspension was achieved by adding a sodium phosphate solution.
- A key step in the synthesis was the peptization of the titanium dioxide precipitate to form a stable nanocrystalline sol.
- The experiment studied the factors affecting the peptization of silver iodide.
Advanced Usage
- "Peptization agent" / "Peptizing agent": A substance added to facilitate peptization, often by providing ions that adsorb onto particle surfaces and create repulsive forces.
- Ammonia is commonly used as a peptizing agent for aluminum hydroxide gels.
- The opposite process, where colloidal particles come together to form a precipitate, is called coagulation or flocculation.
Variants and Related Words
- Peptize (verb): To cause peptization; to disperse (a precipitate) into colloidal particles.
- The researcher needed to peptize the sample to analyze its nanoparticle content.
- Peptizer (noun): Another term for a peptizing agent.
- Sol (noun): The type of colloidal dispersion formed by peptization, where solid particles are dispersed in a liquid.
Synonyms
- Deflocculation (in specific contexts, though deflocculation often refers to breaking up loose aggregates, while peptization can involve breaking primary particles apart).
- Colloidal dispersion.
Antonyms
- Coagulation
- Flocculation
- Precipitation
- Aggregation
Noun
-
the process of converting to a sol; bringing to a colloidal solution
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