5 results about "Continuous release" patented technology

This invention discloses a wear-resistant self-lubricating resin for composite surface layer structures and its preparation method, belonging to the field of composite surface layer technology. It includes a matrix resin component A, a lubricating component B, a curing agent component C, and a coupling agent component D. Reactive functional groups are introduced onto the surface of solid lubricating particles through coupling agent component D. This invention uses a silane coupling agent to perform surface grafting modification on PTFE and MoS₂, introducing reactive functional groups onto the particle surface. These functional groups participate in the curing and crosslinking network of the epoxy resin, forming a "chemically bonded interface." This structure allows the lubricating particles to wear uniformly in the form of a "molecular brush" during friction, while deep lubricating particles are continuously exposed and replenished to the friction interface, achieving a long-term mechanism of lubrication reserve and continuous release. The low surface energy of PTFE fills the gaps in the transfer film, forming a "continuous, dense, low surface energy" composite lubricating film on the mating surface. This synergistic effect significantly reduces the coefficient of friction.

This invention discloses a drilling fluid resistant to carbon dioxide erosion and its preparation method, comprising the following components by mass fraction: 100 parts water, 4-6 parts bentonite, 1-2 parts sodium hydroxide, 3-5 parts sodium carboxymethyl cellulose, 8-10 parts xanthan gum, 20-24 parts carbon dioxide resistant agent, 60-70 parts barite, and 4-8 parts sulfonated phenolic resin; wherein the carbon dioxide resistant agent is a calcium ion resistant agent supported on walnut shell powder. This invention, by adding a carbon dioxide resistant agent, can not only effectively eliminate carbon dioxide invading the drilling fluid during drilling, but also prevent carbonate ions from affecting the drilling fluid's performance, thus avoiding changes in the drilling fluid's viscosity; wherein the carbon dioxide resistant agent uses walnut shells with a porous structure as a support, which can store calcium ions, the main component for eliminating carbon dioxide, within it, thereby achieving a slow and continuous release of calcium ions in the drilling fluid, preventing a sharp increase in the calcium ion content in the drilling fluid, thus improving the efficiency of carbon dioxide elimination and preventing carbonate ions from affecting the drilling fluid's performance.

The application discloses a novel gel repair material, a preparation method and application, relates to the field of tissue repair gel, and aims to solve the problem of single function of the existing water gel, and adopts the technical scheme that DSPE-PEG modified sodium bicarbonate nanoparticles, PVP modified PB NPs and GelMA gel material are made into a composite hydrogel, and the concentrations of the three are controlled. The porous structure of GelMA is stable, PB NPs and sodium bicarbonate are slowly released, so as to control the release kinetics of the two, make the slow release of PB NPs continuously remove ROS and generate oxygen, the continuous release of sodium bicarbonate maintains the pH stability, realizes the time sequence synchronization of "ROS removal-oxygen supply-pH buffering", and further controls the concentrations of PB NPs and sodium bicarbonate, ensures that the oxygen release is in the platform period, can release oxygen at a stable rate, the pH is stable at 7.2-7.4, ensures that the function intensity of PB NPs and sodium bicarbonate is matched, and avoids local microenvironment imbalance, and breaks through the limitation of single function in the prior art.

The application discloses an antibacterial stainless steel material and a preparation method thereof, and relates to the technical field of stainless steel materials.Scheme: taking post-consumer stainless steel as the main raw material, after crushing, oil removal and magnetic separation, the material is returned to the furnace for smelting, supplemented by composite refining and impurity removal under vacuum induction smelting and dynamic control of composition, then a plurality of alloying elements are introduced, and through three-stage precipitation heat treatment and cold deformation annealing process, a nano-scale precipitation strengthening structure is constructed, and finally a functional stainless steel material with mechanical properties, corrosion resistance and long-acting antibacterial property is obtained.The application improves the yield strength and tensile strength; through the Nb-Ta induction mechanism, the Cu precipitation phase particle size is precisely controlled and distributed in the grain boundary and dislocation, so that the organizational stability is improved; the Cu-Mg path is adopted to realize the continuous release of metal ions, and the sterilization rate is relatively high; meanwhile, the recycled material contains a relatively high proportion, and under the premise of ensuring the performance, the raw material utilization rate is significantly improved, and the green metallurgy and sustainable manufacturing are promoted.

The utility model relates to the field of hairdressing tool, specifically disclose a kind of low friction electric clipper head structure with cylindrical friction pair.The structure includes fixed cutter seat, fixed cutter on fixed cutter seat, moving cutter holder and the moving cutter installed on it, provide uniform pressure spring, as the main force axis steel shaft, the roller shaft installed on moving cutter holder and the lubricating cotton of continuous release lubricant.Spring is supported by steel shaft and accurately positions the interval of moving cutter and fixed cutter, and the roller shaft and steel shaft form cylindrical friction pair, and its contact area is reduced by more than 90% compared with traditional plane friction pair.The spring elasticity coefficient is 5-6 N / mm, and the steel shaft diameter is 2.0-2.5 mm, and the roller shaft diameter is 1.5-2.0 mm, and the lubricating cotton lubricant release rate is 0.05-0.07ml / hour.The structure can also include adjusting mechanism for fine adjustment moving cutter and fixed cutter interval, and the contact surface provided with oil storage groove.