1. In colloid chemistry, substances that can reduce the surface tension of solvents are called surface active substances. According to this principle, we use rosin soap as a surfactant such as pigment to make rosin dissolve with nonpolar polyolefin resin at high temperature, which obviously changes the interfacial tension of the system and makes it have firm adhesion on the substrate surface without roughening treatment such as electric cutting.

2 Surface active substances Surface active substances are also called surface active substances, such as various surfactants. These surface active substances are added to liquids (mainly water, etc.). ) reduces their surface tension coefficient, that is to say, the surface tension coefficient of these surface active substances is smaller than that of the original liquid.

Both of these substances have surface activity, so they are generally called surface active substances. The surface tension of the third type increases slightly with the increase of concentration (curve 3). These substances have no surface activity, so they are called non-surface active substances. For surface active substances, the first and second kinds of substances are also different, and their solution structures are also fundamentally different.

4. Some solutes will reduce the surface tension of the solution. This substance (solute) is called surface active substance.

5 coal softening mechanism 3. 1 mechanism Any substance that can significantly reduce the surface tension of the solution in a low concentration range and make the concentration of the solution on the surface higher than the internal concentration is called a surface active substance. Softening agent is a surface active substance. Surface active substances have two common characteristics: one is an amphiphilic molecule in chemical structure, that is, one end of the molecule is hydrophilic, the other end is lipophilic or hydrophobic, and the other end is nonpolar.

There are many explanations for surfactants.

There are many contact points in the structure, which have affinity with some substances and great activity.