What are hyperdispersants for electronic pastes? What are their uses?
Publish Time: 2024-09-25
Hyperdispersants for electronic pastes, also known as superdispersants, are a special type of surfactant whose molecular structure contains two groups that are opposite in solubility and polarity, namely a hydrophilic group (polar group) and a solvation chain (non-polar group). This unique molecular structure enables hyperdispersants to be oriented on the surface of a substance or on the interface between two phases, thereby reducing interfacial tension and producing a significant dispersing effect on electronic pastes in aqueous, oily or water-oil general systems.The main functions of hyperdispersants for electronic pastes include:Improving dispersibility:Hyperdispersants can combine with polar groups on the surface of particles through their anchoring groups to form stable anchoring points, effectively preventing particle agglomeration and sedimentation, thereby significantly improving the dispersibility of nanoparticles or pigments in electronic pastes.Increasing solid content:By improving dispersibility, hyperdispersants can allow more solid particles to be added to the paste without affecting its fluidity and stability, thereby increasing solid content and improving resource utilization efficiency.Improve the compatibility of nanoparticles and polymer matrix:Hyperdispersants form a protective layer on the surface of nanoparticles, and through the steric hindrance effect of the solvated chain, reduce the interaction between nanoparticles and polymer matrix, improve their compatibility, and make the electronic paste more uniform and stable.Reduce viscosity:Hyperdispersants make the particle distribution in the electronic paste more uniform through its dispersing effect, thereby reducing the overall viscosity of the paste and facilitating processing and handling.Prevent pigment flocculation and blooming:For electronic paste containing pigments, hyperdispersants can prevent the flocculation and blooming of pigment particles, making the hue and tinting strength of the coating more stable.Improve gloss and tinting strength:By improving dispersibility and stability, hyperdispersants can significantly improve the gloss and tinting strength of electronic paste after coating.Specific application examples:Take VOK®-Disper 41000 hyperdispersant as an example. It can not only improve the characteristics and performance of nanoparticles (including organic and inorganic particles of different chemical compositions) in polar, non-polar solvent systems and aqueous systems, but is also particularly suitable for lithium battery electronic paste. The hyperdispersant deflocculates and stabilizes conductive material particles or powders through steric hindrance effects, provides the same charge to solid particles or powders, effectively avoids co-flocculation, and reduces the viscosity of the paste. At the same time, it can also increase solid content, improve resource efficiency, and is suitable for a variety of solvent systems. It is one of the key factors in improving the performance of electronic pastes in the new energy industry.Hyperdispersants for electronic pastes play an important role in improving dispersibility, increasing solid content, improving compatibility, reducing viscosity, preventing pigment flocculation and blooming, and improving gloss and tinting strength.
