Basic Theory

Both are surfactants in different functional roles: emulsifiers reduce oil-water interfacial tension and form an interfacial film to stabilize emulsions (depends on HLB value); wetting agents reduce solid-liquid interfacial tension, promoting liquid spreading and penetration (depends on contact angle and dynamic surface tension). This article explains the principles, common grades, and selection guidelines.

The toxicity of a dispersant depends on its chemical structure and carrier medium: waterborne polymer dispersants are generally low-toxicity, while solvent-borne dispersants pose flammability and irritation risks due to organic solvents. This article clarifies how to assess dispersant toxicity, differences between waterborne and solvent-borne types, compliance selection for food contact applications, and important usage notes including SDS review, ventilation, and personal protection.

Dispersants are additives that keep solid particles (pigments, fillers) stably suspended in liquids, preventing settling and agglomeration via electrostatic repulsion or steric hindrance. This article explains their main chemical types (polyacrylates, polyurethanes, polyethers/polyesters), classification, stabilization mechanisms, selection guidelines, along with common product series and typical applications such as graphite slurries.

Nonionic and anionic surfactants differ in whether the hydrophilic group carries a charge: anionic surfactants (LAS, AES, SDS) are negatively charged, offering strong detergency and high foaming, while nonionic surfactants (AEO, Tween, acetylenic diols) are uncharged, providing excellent tolerance to acids, alkalis, and salts, good compatibility with other ionic types, and the ability to formulate low-foam systems. This article compares the principles, common types, and application selection of these two surfactant classes.

Are surfactants toxic? Direct answer: Most industrial surfactants fall into low-toxicity to slightly toxic categories, but “non-toxic” is incorrect. This article explains acute toxicity classification (LD50/GHS), common surfactant toxicity comparisons, hidden risks such as APEO and 1,4-dioxane, and safe use guidelines including gloves, goggles, ventilation, etc.

Surfactants, composed of hydrophilic heads and hydrophobic tails, reduce surface tension. This article explains their composition, classification (ionic vs. nonionic), common types (SDS, AES, LAS, AEO, Tween, acetylenic diols), and selection guide, including alternative options for import substitution.

Acetylenic diol surfactants offer a unique combination of low foam and strong wetting/dispersion, typically used at 0.1%–1% to address slow wetting, uneven dispersion, and process foam in waterborne formulations. Key selection criteria include dynamic surface tension, foam height, and system compatibility—refer to the respective TDS for specific data.

This article analyzes the technology trends, market opportunities, and industry challenges of oilfield corrosion inhibitors, providing strategic references for related enterprises.

This article provides a multi-dimensional discussion of corrosion inhibitors for oilfield and refining applications, covering performance requirements, inhibitor types, structure–performance relationships of typical chemistries, and a comparison of leading domestic brands including Tianjin Hi-Perferal.