Attention should be paid to the compatibility of surfactants in use

2020-03-22 13:43:04

The compounding and Synergistic Technology of surfactants in our country is relatively backward, so we should strengthen the research on the basis and application technology in this field. The technology of multi-functional synergism, solubilization, emulsification, dispersion and anti caking should be paid more attention. Compounding technology is also the key to promote the application of special surfactants in leather making. The results show that the emulsification, dispersion and wettability of surfactants can be improved by adding 10-6 grade special surfactants.

In addition, we should also pay attention to the compatibility of surfactants. Non-ionic surfactants have excellent compatibility with other surfactants and can produce good synergistic effect, which should be paid attention to. Most of leather auxiliaries are compounded products of several surfactants, so synergistic compounding technology is a key technology for the application of surfactants in leather making process.

At present, anionic and non-ionic surfactants are mainly used in leather industry, while cationic and amphoteric surfactants are relatively less used. With the development of economy and the improvement of people's living standard, the demand for new leather is increasing, and the demand for leather auxiliaries is also higher. It is urgent to develop special detergents, soft finishing agents and waterproof finishing agents for leather products. As a new growth point of surfactant industry, the development and research of surfactant for leather industry will be paid more attention.

The environmental protection requirements of surfactants for leather industry are mainly reflected in two aspects: first, they are required to have good biodegradation performance and mild action; second, they are required to promote the penetration, absorption and fixation of other materials in the use process, and reduce the pollution of leather industry. The surfactants such as sucrose ester, alkenyl sulfonate, fatty acid methyl ester sulfonate and SEC alkyl sulfonate have broad prospects for development due to their good biodegradability and mild action.

In leather making industry, we should focus on developing soaking auxiliaries and degreasing agents that can reduce salt and grease pollution, assisting Liming and dehairing agents that can reduce sulfur pollution, fixing fixative oil fixative to promote dye and grease absorption, and assisting emulsion finishing agents with good performance, so that they can partly or completely replace solvent finishing. There is still a lot of work to be done in this regard.

In recent years, amphoteric surfactants based on phosphoric acid have been studied and developed at home and abroad. Phosphate ester leather fatliquor molecules contain phosphoric acid, which can combine with chromium salt and other multivalent metal salts, and at the same time can combine with leather fiber, giving leather permanent fatliquoring effect and good permeability. After fatliquoring, leather has good hydrophobic and mercerizing properties. In particular, it has good biodegradation performance, which can reduce the pollution of waste liquid and protect the ecological environment. It is an important direction for leather chemical material industry to develop various biodegradable leather surfactants.