Agricultural Wetting Agent Base Wetting Agent

Sep 15, 2020

SILIBASE SILICONE produce and sell Agricultural Wetting Agent Base Wetting Agent,Wetting agents are a class of surfactants whose function is to reduce the surface tension of the drug solution, to quickly wet the drug particles, and to make the drug solution easy to wet and spread on the surface of the application target to help the agent penetrate. Commonly used are saponin-containing saponin powder, tea seed cake powder and lignin-containing sulfite pulp waste liquid, and synthetic surfactants such as polyoxyvinyl alkyl aryl ether, polyoxyvinyl alkyl ether , Alkylbenzene sulfonate, alkyl naphthalene sulfonate, etc.

Agricultural wetting agents are pesticide additives commonly used in the contemporary era. It is a kind of potentiating the effect of the liquid medicine spreading on the plant surface and the adhesion. It is very important to effectively select a good wetting agent for the designated crops and pesticides.

Most of the plant surface is composed of cornea containing wax. These substances constitute a low-energy surface, and most pesticides are often applied in the form of an aqueous solution. Because the surface tension of water is higher than the critical surface tension of this low-energy surface ", it is usually not easy to spread the liquid directly in contact with plants. In order to improve the wettability of this system. Some are often added to the liquid Surfactant, that is, wetting agent. The wetting effect can be measured by the concentration of the active agent required when the plant leaf surface is spread, and its essence is to reduce the surface tension of the drug solution. The surface tension active agent will also have a good wetting effect on water-soluble chemicals.

The wetting effect is important for pesticides, not only to increase the contact area between the liquid and the crop, but also to maintain the effective concentration of the pesticide, enhance plant absorption, and improve the efficacy of the important role of the wetting effect. The importance of pesticides, especially hormones For agricultural preparations, their functions should meet the following conditions:

(1) Maintain a uniform distribution of pesticides on the application site (such as leaves).

(2) To ensure the stability of the concentration during the effective absorption time, however, the spraying method is often used for the current pesticide application method. In the absence of wetting agents, droplets of different sizes will appear, distributed on the leaf surface in a spherical or hemispherical shape. That is, the smaller the radius of the droplet, the higher the saturated vapor pressure, and the faster the evaporation. The radius of the droplet is a hundred times smaller, and the evaporation rate will increase ten thousand times. So it seems that the result of spraying will be such that the saturation vapor pressure of large droplets is low and evaporation is slow, which is beneficial to maintaining the effective concentration. However, the low dispersion degree is not conducive to full contact with the leaf surface. The small droplets are well dispersed. It is conducive to the contact between the liquid medicine and the leaf surface, but because the evaporation is too fast, the effective concentration cannot be guaranteed. It can be seen that it is difficult to achieve good efficacy if the liquid medicine is sprayed directly without adding a wetting agent.

When the appropriate wetting agent is added, the drug solution can be quickly spread into a liquid film, which eliminates the phenomenon of rapid evaporation of small droplets, which not only ensures the stable concentration of the drug solution, but also increases the full contact between the drug solution and the leaf surface. So that the drug effect can be fully exerted. It can be seen that the role of wetting agent is crucial.