2results about How to "Increase surface lubricity" patented technology

This invention relates to the field of advanced petrochemical new materials technology, and discloses a luminescent composite material, its preparation method, and its application. The composite material comprises the following components: homopolymer polypropylene, polybutylene succinate, a compatibility modification system, double-modified rare-earth strontium aluminate luminescent powder, dispersant, antioxidant, weathering agent, toughening agent, nucleating agent, and silane coupling agent. This invention employs a compatibility modification system composed of maleic anhydride-grafted PP-g-PBS copolymer and double-modified nano-montmorillonite. The maleic anhydride-grafted PP-g-PBS copolymer constructs a chemical link between the polypropylene and polybutylene succinate molecular chains through a grafting reaction, reducing the interfacial tension between the two resins. The double-modified nano-montmorillonite, after ionic liquid intercalation and silane grafting treatment, exhibits increased interlayer spacing and improved surface activity, uniformly dispersed in the matrix, and acts as a physical crosslinking point, improving the compatibility of the matrix resin and preventing phase separation.

This invention relates to a method for modifying the surface of biomaterials with an ultrathin hydrophilic lubricating coating and its application. The method comprises: mixing plasma-treated biomaterials with a precursor solution and performing an in-situ polymerization reaction to obtain biomaterials with an ultrathin hydrophilic lubricating coating; the precursor solution includes dopamine or its salt, zwitterionic monomers, and Tris buffer. The ultrathin hydrophilic lubricating coating prepared by the method of this invention can reduce the friction coefficient of biomaterial surfaces and has strong hydrophilic lubrication properties; it can form ultrathin hydrophilic lubricating coatings on the surfaces of different biomaterials, is suitable for surface modification of most biomaterials, has a simple and easy process, good hydrophilic lubrication properties, and can effectively improve the surface lubrication performance of biomedical materials.