Surfactant used in paper-making industry

Surfactants for deinking of waste paper has reached as much as 7000t in a year in China This indicates that surfactant is more and more important in improving pulping process and performance of paper. Add good penetration anionic and non-ionic surfactants in the bleaching process can achieves a uniform bleaching effect. Add washing active substances alkyl benzene sulfonic acid sodium or nonylphenol ethoxylate in the pulp bleaching process can get a good washing effect. Surfactants have a wide range of applications in deinked, paper sizing, blanket washing and paper coating pigment dispersant. etc.

For liquid interface, surfactant can through reduced interface tension to increases wetting and improve penetration role, some branched-chain structure or more alkyl structure of surfactant has good of wetting performance, such as fast penetration agent and penetration agent JFC, using wetting role of surfactant during pulp process, and accelerate cooking additives and other additives of penetration and uniform dispersed role on cooking raw materials.

With the increasing of environmental pressure, in order to alleviate the lack of pulp and raw materials and reduce pollution, save energy, reduce costs, etc, waste paper recycling attracted more and more attention.

Commonly used deinking agents are made up of surfactants and inorganic drugs or various surfactant blends. Commonly used anionic surfactant in deinking agents formula are potassium soap, sulfonic of oil, straight chain alkyl benzene sulfonic acid sodium, fat alcohol sulfate, sulfonic base succinate II Xin ester sodium salt, fat alcohol poly oxygen vinyl ether sulfuric acid ester sodium salt, etc, as well as alkyl phenol poly oxygen vinyl ether fat alcohol poly oxygen vinyl ether, poly ether, poly oxygen vinyl loss sorbic alcohol fatty acids ester, fatty acids poly oxygen vinyl ester, and other non-ion surfactant.

With the popularity and importance of the application of surfactants in paper-making industry, and the application of surfactant in papermaking in China have developed greatly. With the requirements to paper of industrial use increasing, development of additives for paper paid more and more attention, such as organic fluoride gel, silicone waterproofing agent, lubricant calcium stearate, polyethylene oxide isolation agent emulsifying and the developmnet of other special surfactant. Especially the low cost organic fluorine, silicone and other special surfactant study on application of papermaking. Click here now!

Silicone additives and surfactants

The excellent exhibition capacity of silicone is an important factor in its development to become auxiliaries. Exhibitions are often mistaken for wetting. Exhibition does not depend on surface tension decrease, and organic fluorine surfactant in surface tension lower than silicone. In view of its many features and benefits, silicone used as additives in the pigment industry will have unexpected results.

Skeleton of hydrophobic has nothing to do with the presence of silicon, their hydrophobicity is higher than methylene groups, while methylene groups are major components of many commonly used functions of hydrophobic hydrocarbon surfactants. The equilibrium reaction applied by synthesis matrix will have a different length of the allocation of polysiloxane chain between pools. It appears from the many features associated with silicone, it mainly produced by three of siloxane. Therefore, trisiloxane skeleton must be steamed out from mother liquor of silicon, and this will increase in the synthesis of auxiliary production cost.

Hydrophilic basically similar to most commonly used surfactants, ethyl Kiki chain consisting of element has a Poisson distribution. As to mixed synthesis condensation reaction kinetics, which is, in any case, the isopropyl groups of distribution should be bias towards one end of the chain. Polyether can stay at Tsunemoto ends or more hydrophobic groups end caps. Overall polarity of surfactant may be replaced by two methyl silicons oxygen group adjusted proportions.

Agricultural organic silicon spray additives is a organic silicon additives, they are widely applied to pesticides insecticide, there is no ecomposition on original drug. They have super low surface tension and super extended capacity (extended capacity is greater than water of 9 times times above), this can well enhanced liquid on plant surface and insects surface of penetration and cover and to improve the efficacy. In addition, they can enhance pharmacy anti-rain scour capacity. It can play a good role in certain pest outbreaks.

At present, application of pesticide surfactants are fatty alcohol polyoxyethylene, sulfonic acid ester, alkyl-phenol polyoxyethylene ether, sulfonate, amide, silicone, etc. Silicone additives with its good agro-silicone additives have good exhibitions and permeability. Specifically, these additives can make solutions easier to penetrate plant surfaces. This ability means it can get the great spray effect with only a small amount of spray. It can save up to 50% of water during the spray of pesticides. Read more!

Surfactant and emulsion coatings

In recent years, water as the medium of water paint in coating production percentage increase year by year, which has become one of the main varieties of paint in the future development. Emulsion coatings play an important role in water-borne coatings, it is a polymer-based materials (film) together with fillers and additives of the coating system. Because they can be thinned with water, the construction is convenient, safe and nontoxic, low costs and excellent coating properties and other characteristics, they are widely used for Interior and exterior painting, industrial and maintenance of paint as well as others, such as fiber, paper, leather and many other application areas, plays an increasingly important role.

Competitive adsorption of surfactant is frequently asked questions in emulsion paints, paint system is complex, so it has a lot of different surfactants and a different interface. Different types of surfactants as Binder resin in the polymer or latex particles will produce competitive adsorption on the pigments surface. This mainly depends on the compatibility of base material, surfactant and surface with each other. The adsorption and desorption of surfactant may cause changes in the rheological behavior and make dispersion system to lose stability.

Competitive adsorption of surfactants are also related to associative thickeners in the coating system. Associative thickeners has a high surface activity, they have greater tendencies on hydrophobic surfaces such as latex particles. Hydrophobically modified polyurethane is the so-called HEUR thickener. If LaTeX surface not covered by the surfactant fully, activity of hydrophobic associating polymer on the surface will be adsorbed on the surface of particles, and it often lead to gel. After adding the non-ionic surfactants, it is uniform dispersion of flowing again, which suggests that non-ionic surfactant replacement surface polymer of latex particles.

These special surfactants can eliminate surface tension gradients due to surface faster than the internal when coating solvent evaporation in the applications. In addition, applications of reactive surfactant in the emulsion polymerization has received more and more attention in recent years. The emulsifier connected with the latex particles in the form of Covalent bonds, it can avoid or at least minimize a lot of problems when using traditional emulsifier, improving the stability of polymer emulsion and its film-forming properties. Read more here!