4results about How to "High hydroxyl content" patented technology

This invention discloses a method for increasing the hydrophilicity of titanium / titanium alloy dental implants using an electrochemical approach, comprising the following steps: S1, pretreating the titanium / titanium alloy dental implant to obtain a pretreated titanium / titanium alloy dental implant; S2, sandblasting and drying the pretreated titanium / titanium alloy dental implant obtained in S1 to obtain a treated titanium / titanium alloy dental implant; S3, acid etching the treated titanium / titanium alloy dental implant obtained in S2 to obtain an acid-etched titanium / titanium alloy dental implant; S4, electrochemical activation treatment to obtain an activated titanium / titanium alloy dental implant; S5, continuously rinsing the activated titanium / titanium alloy dental implant obtained in S4 with purified water for 20 seconds and drying it in a vacuum drying oven. This invention uses cyclic voltammetry (CV) electrochemically to activate the titanium / titanium alloy implant, thereby enhancing its hydrophilicity.

The application relates to the field of implant technology, and particularly relates to a dental implant with a high-bioactivity surface coating and a preparation method thereof; in order to improve the bioactivity of a dental implant and improve the healing condition of the dental implant after implantation, the dental implant surface is first subjected to sand blasting treatment for roughening and acid liquid and alkali liquid immersion treatment, the content of hydroxyl groups on the surface of the dental implant is increased, the hydrophilicity of the dental implant is improved, the content of active groups on the surface of the dental implant is increased, and on this basis, a polydopamine coating containing exosome microcapsules is introduced into the surface of the dental implant, so that the antibacterial performance of the dental implant is improved and the proliferation of cells is induced, the implantation of the dental implant is accelerated, and the bioaffinity of the dental implant is greatly improved.

The invention provides a preparation method for extracting bamboo reed cellulose and MXene composite regenerated fibers based on oxidation-ultrasonic coupling, and belongs to the field of biomass-based functional fiber materials.The preparation method comprises the steps that after bamboo reed raw materials are cooked, the pH value of a system is adjusted, the liquid carrying rate is controlled, oxidation and ultrasonic pretreatment is conducted, the raw materials are purified, and the bamboo reed cellulose and MXene composite regenerated fibers are obtained; bamboo reed cellulose is obtained; a composite solution system is adopted for dissolving the spinning solution, and a uniform spinning solution is prepared; the preparation method comprises the following steps: uniformly dispersing MXene in a spinning solution in proportion, and preparing the bamboo reed-based MXene composite regenerated cellulose fiber by taking a buffer solution as a coagulating bath and adopting wet spinning. The invention solves the problems of high energy consumption, large reagent dosage, low yield and easy damage of cellulose structure in the existing bamboo reed cellulose extraction, and the problems of insufficient cellulose purity, poor MXene dispersity, poor interfacial compatibility, poor spinning solution stability and forming effect and the like in the MXene composite regenerated fiber preparation.

The application discloses a kind of super-hydrophobic unit cell powder, which is composed of particles in unit cell structure; each unit cell particle has a shell of super-hydrophobic round diatomite, and the round diatomite has a hollow porous structure; the hollow cavity of the diatomite is filled with super-hydrophobic inorganic nanoparticles and corrosion inhibitor filled in the gap between the inorganic nanoparticles, and a membrane for sealing the pores of the diatomite shell is also provided. The application also discloses a preparation method of the super-hydrophobic unit cell powder and its application in preparing a composite anticorrosive coating. During the formation of the coating, the unit cell particles are connected to the resin through chemical cross-linking by the hydroxyl groups on the surface of the unit cell particles, and the unit cell particles are connected to the resin through chemical bonding, which can significantly improve the compatibility and bonding force of the unit cell particles and the resin. By increasing the spraying pressure during spraying, the vertical density of the coating is improved, and the coating has good mechanical strength and long-term corrosion resistance due to the synergistic effect of multiple factors.