12 results about "Continuous release" patented technology

The invention discloses a time-control self-triggering type carbon dioxide sustained-release capsule for carbonized soil and a preparation method of the time-control self-triggering type carbon dioxide sustained-release capsule. The capsule comprises a gas production core and a sustained-release coating layer from inside to outside, the preparation method comprises the following steps: mixing the gas production core powder; the method comprises the following steps: uniformly mixing dry gas production formula powder according to a set proportion in a dry environment; granulating, rolling and drying the gas production core master batch; preparing coating powder; uniformly mixing the dried coating formula powder in proportion under a drying condition; the surface of the core is wet; the slow-release coating layer wraps the core; and drying at low temperature and taking out to obtain a carbon dioxide sustained-release capsule final product with complete structure and stable performance. The carbon sequestration soil is uniform in carbonization and high in strength, the problems of surface layer hardening and internal non-uniformity caused by carbonization from outside to inside are avoided, and therefore the overall strength of the carbon sequestration soil is remarkably improved; the initial release and continuous release time of the carbon dioxide is accurately controlled, so that the carbon dioxide is perfectly matched with a construction process, and the carbon dioxide is efficiently utilized for carbonization reaction.

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.

The invention relates to the technical field of phosphorite flotation, in particular to a low-grade phosphorite float separation instrument which comprises a barrel body, a microbubble mineralization assembly, a flotation assembly and a driving assembly, the barrel body is of a cylindrical hollow structure, the microbubble mineralization assembly is fixedly installed at the lower end in the barrel body, and the microbubble mineralization assembly comprises a liquid inlet end and a dispersion end; the flotation assembly is fixedly installed in the middle of the interior of the barrel body, and the dispersion end of the microbubble mineralization assembly is connected with the middle of the flotation assembly; through the designed micro-bubble mineralization assembly, a dual-bubble generation mechanism of preliminary dispersion of venturi negative-pressure air suction and continuous release of micro-bubbles by a microporous wall is integrated, and a high-strength turbulent flow field is generated in combination with the crushing frame rotating at a high speed, so that high-probability and high-strength collision and adhesion of micro-bubbles and micro-fine particle phosphorite are forcibly promoted; the problem that micro-fine particles are difficult to recycle in conventional flotation is solved.

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 invention relates to the technical field of organic silicon materials and perfume slow release, and discloses a liquid silica gel material and a preparation method and application thereof.The liquid silica gel material comprises vinyl polysiloxane, a modified mesoporous silica carrier, a cyclodextrin inclusion compound, a polyethylene glycol pore-foaming agent and the like; through a triple synergistic strategy of mesoporous carrier adsorption loading, cyclodextrin inclusion protection and sacrificial template pore-forming, a multi-layer slow-release system is constructed in a compact silicone rubber matrix, and 30-90-day continuous release of the agilawood active component is realized.

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 present invention provides a spacer that enables repeated or continuous release of an active substance on its outer surface. [Solution] The present invention relates to an embedded spacer 100 for delivering medical fluid to a patient, comprising a first sub-element 120, a second sub-element 130, an outer surface 104, a channel 101, a plurality of delivery valves 110, and a connecting element 107 having a joint, wherein the connecting element movably connects the first sub-element to the second sub-element.

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 discloses a rubber and plastic insulation board with embossments, which relates to the technical field of insulation materials and comprises a rubber and plastic insulation board body and a base material, the rubber and plastic insulation board body comprises the base material in the middle layer, and the outer end face of the base material is coated with a flame-retardant coating. According to the rubber and plastic insulation board with the embossment, the nano-silver ion and organic silicon resin composite antibacterial coating at the back end of the base material of the rubber and plastic insulation board body inhibits mould and bacterium breeding in a long-acting mode through the dual effects of continuous release of silver ions and a resin hydrophobic barrier, and the maintenance cost is reduced; the multi-layer nanometer material flame-retardant coating on the outer end face quickly forms a carbonization layer at high temperature, oxygen is isolated, flame spreading is inhibited, and safety is improved; in addition, the reinforcing structure of the embossment protrusions enhances the surface abrasion resistance and reduces construction damage, the flexibility of the closed-cell base material adapts to the complex installation environment, the comprehensive performance is comprehensively superior to that of a traditional flat heat preservation plate, the attractiveness is improved, the heat preservation effect is enhanced, and the using effect of the rubber and plastic heat preservation plate is improved.

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.

The invention provides a multi-layer core-shell structure gradient oxygen release material as well as a preparation method and application thereof. The gradient oxygen release material comprises an inner core, an oxygen release functional shell layer and a permeation regulation and control layer from inside to outside, wherein the inner core is quartz sand; the oxygen release functional shell layer is powder wrapping the inner core, and the powder comprises calcium peroxide and sodium percarbonate; the permeation regulation and control layer is a paraffin film oxygen release material through the design of a multi-layer core-shell structure, the material shows the obvious gradient oxygen release characteristic of early-stage rapid oxygen release-middle-stage stable oxygen supply-later-stage slow attenuation in water, gradient and continuous release of oxygen is achieved, the stability of the oxygen release material is improved, the oxygen utilization rate is increased, and the service life of the oxygen release material is prolonged. The dissolved oxygen level of the water body can be effectively maintained, and the restoration requirements of different scenes of the underground water source are met.

The invention relates to an asphalt modifier with a long-acting slow-release negative oxygen ion-far infrared function as well as a preparation method and application of the asphalt modifier, and belongs to the technical field of crossing of road engineering materials and ecological environment functional materials. In order to solve the problem that negative oxygen ion release of existing modified asphalt is not lasting, the invention provides an asphalt modifier with a long-acting slow-release negative oxygen ion-far infrared function, and the asphalt modifier comprises tourmaline powder, a lanthanide rare earth tailing compound, a porous inorganic carrier and a surface modifier. A tourmaline-rare earth oxide-porous carrier ternary composite system is adopted, a functional microstructure with a high surface electric field, valence state regulation and control and rich contact interfaces is constructed in an asphalt matrix, negative oxygen ions can be continuously generated from air and a road surface water film, and slow-release output in the whole life cycle is achieved. The tourmaline powder with the specific particle size has the far infrared radiation characteristic at the same time, ideal conditions are created for negative oxygen ion generation by regulating and controlling the microenvironment humidity, and continuous release of the negative oxygen ions is further promoted.