Surfactants can be used to make usable pesticide preparations from raw pesticide that cannot be used directly.As a pesticide additive, it can not only improve the use effect of pesticides, but also reduce the amount of pesticides, reduce the impact of pesticides on the environment, and bring great benefits for agricultural production.However, because pesticides are special chemicals with strong biological activity, and their prevention and control objects, protection objects and environmental conditions are very complex, surfactants in pesticides should be selected and formulated according to the properties and characteristics of the original drug, and the influence of surfactants on target organisms should also be considered. 

  1, solvent

  Using micelles of surfactants, the solubility of insoluble active agents in solvents is significantly increased, which is called solubilization.The surfactant with HLB=15-18 can be used as a solubilizer, but only when the concentration of the solubilizer is higher than the critical micelle concentration can solubilize.At this point, the insoluble drugs are encapsulated or adsorbed in the glue by the solvo-hydrophilic group, solvo-hydrophilic group in water, in the non-polar drugs can be dissolved in water. 

  2, dispersant

  Dispersants can prevent or prevent the accumulation of solid or liquid particles in a dispersed system and keep them evenly dispersed for a long time.The dispersant adsorbed on the oil-water interface or the surface of solid particles, and formed charge or steric barrier around the particles, which helped to prevent the pesticide particles from gathering again during dispensing and storage.As a dispersant is generally a multi-ring anionic surfactant, such as alkyl naphthalene sulfonate and naphthalene sulfonate formaldehyde condensation of sodium salt, lignosulfonate, etc..Polymer dispersants (such as polycarboxylate sodium salt) are particularly important in the preparation of water suspension because of their adsorption properties, charge of dispersed particles and large space barrier.

  Alkyl naphthalene sulfonate:

  Molecular formula: R-C10H6-SO3M(R is alkyl, M is cation)

  Brown powder.Soluble in both hard and soft water.Is an anionic surfactant.

  As a dispersant, can reduce the viscosity of solid particles, conducive to the molding operation of ceramic products;Used as viscosity inhibitor in low temperature vulcanization process of styrene butadiene rubber;Viscosity reducer in pigment paste;Dispersant and stabilizer in synthetic rubber polymerization process;And used in leather products dyeing, fabric processing, color lake, paint, ink, pesticide formula.Is the main component of pull powder BX.The main products are sodium salt and ammonium salt.