28results about How to "Performance is easy to control" patented technology

The invention belongs to the technical field of nanofiltration membrane separation, and particularly relates to an organic solvent composite nanofiltration membrane as well as a preparation method and application thereof. A cross-linked polyimide ultrafiltration membrane is used as a base membrane, and a polyesteramide separation layer is obtained by polycondensation of a polyacyl chloride monomer and a polyamine monomer on the cross-linked polyimide base membrane. The preparation method comprises the following steps: soaking a naturally aired polyimide ultrafiltration base membrane in a water phase solution containing polyamine, airing, soaking in an organic phase solution containing polyacyl chloride, carrying out interfacial polymerization reaction, and carrying out thermal crosslinking post-treatment on the prepared membrane to obtain the thin-film composite nanofiltration membrane. And hydrophobic trifluoromethyl and hydrophilic phenolic hydroxyl are introduced by utilizing a functional group effect to prepare the thin-film composite nanofiltration membrane with a Janus pore channel structure. The membrane composite nanofiltration membrane can simultaneously improve the permeation flux of polar and non-polar solvents, obviously improves the flux of the non-polar solvent, can maintain low molecular weight cut-off, and has high economic value for separation of an organic solvent system in industry.

The invention belongs to the technical field of nanofiltration membranes, and particularly relates to a thin-film composite nanofiltration membrane as well as a preparation method and application thereof. The composite nanofiltration membrane comprises a porous ultrafiltration supporting base membrane and a polyamide separation layer constructed on the porous ultrafiltration supporting base membrane, and the polyamide separation layer is obtained by polycondensation of a polyacyl chloride monomer and a polyamine monomer on the porous ultrafiltration supporting base membrane in the presence of an additive, the additive is tertiary amine based on an adamantane structure and a derivative thereof. Uniformly mixing a polyamine monomer, an additive and water to obtain a water-phase solution; uniformly mixing a multi-acyl chloride monomer with an alkane solvent to obtain an organic phase solution; the aqueous phase solution and the organic phase solution are sequentially applied to a porous ultrafiltration supporting base membrane, and the thin-film composite nanofiltration membrane is obtained through interfacial polymerization reaction and drying. The membrane composite nanofiltration membrane is thin and compact, has high water flux, high salt interception and monovalent and divalent anion separation performance, and can be used for low-cost and efficient desalination.

The invention belongs to the technical field of functional titanium alloy material casting, and discloses a preparation method of a locally porous and position-controllable titanium alloy functional material, which comprises the following steps: selecting a hollow ceramic ball, and manufacturing a prefabricated structure matched with the porous material according to the porous material to be prepared; a mold matched with the porous material is selected, and the prefabricated structure is installed at the designated position of the mold according to the manufacturing requirement of the porous material and then manufactured into a casting mold; a proper alloy material is selected according to the design requirement of the porous material, and molten metal is poured into the casting mold after the alloy material is heated and liquefied; the molten metal flows in the mold, so that gaps between an inner cavity of the mold and the hollow ceramic balls of the prefabricated structure are filled with the alloy material; and removing the mold to obtain the required porous material. The method can be applied to an existing titanium alloy casting technology, the requirements for simple technological process, easy implementation and rapid design and development are met, and technical support is provided for customization, manufacturing, popularization and application of local porous titanium alloy functional materials.

The invention provides an agglomeration grinding fluid processing method for a sapphire LED chip back reduction process. The method comprises the following steps: S1, preparing a formula; s2, mixing; s3, precipitating and clarifying; s4, filtering and purifying; s5, performance testing; and S6, applying to grinding. The agglomerated grinding fluid has the following advantages in the sapphire LED chip back reduction process: the suspension property and the viscosity are improved: by adding the thickening agent (such as carbomer, CMC and the like), the suspension property of the liquid is enhanced, the precipitation of the grinding material in the grinding process is reduced, and the uniform distribution of the grinding material is ensured; according to the process, the resin honeycomb pad is matched with the agglomerated suspension liquid, a traditional copper disc process is replaced, the copper disc correction period is shortened, the time cost is reduced, and the production efficiency is improved; due to the use of the thickening agent, the grinding material is not easy to throw out in the grinding process, so that the utilization rate of the agglomerated powder is improved, and a more effective processing effect is ensured.

The invention relates to the technical field of firework cylinders, in particular to a firework mold pressing cylinder based on cassava flour pregelatinization and a preparation method thereof, and the mold pressing cylinder is prepared from the following raw materials in parts by weight: a framework material compounded by crystal transformation method II type anhydrous gypsum and calcium carbonate stone powder, pregelatinized cassava flour, wood fibers, stearic acid and a proper amount of water. The tapioca flour is pre-gelatinized by warm water at 40-60 DEG C, and the pre-gelatinization degree is greater than or equal to 80 The crystal transformation method II type anhydrous gypsum is prepared from ardealite through a low-temperature crystal transformation method. The preparation method comprises the following steps: pre-gelatinizing the tapioca flour, pulping, mixing with other dry blends and hot water, and finally carrying out high-temperature compression molding. Through the synergistic effect of the pre-gelatinized tapioca flour and the crystal transformation method gypsum, the dry basis dosage of the tapioca flour is remarkably reduced, meanwhile, the compressive strength and the falling resistance of the mold pressing barrel are greatly improved, the multiple purposes of reducing the cost, improving the performance and absorbing industrial solid waste phosphogypsum are achieved, the product quality is stable, and the mold pressing barrel is suitable for industrial production.

The invention discloses a composite material for manufacturing a fan blade and a preparation method of the composite material. The composite material is prepared from the following raw materials in parts by weight: 60 to 70 parts of acrylonitrile-styrene copolymer, 2 to 5 parts of acrylonitrile-butadiene-styrene copolymer, 25 to 35 parts of glass fiber, 0.1 to 0.5 part of coupling agent and 0.01 to 0.1 part of lubricant. According to the present invention, the molar ratio and the use amount of the monomers in the AS resin and the ABS resin are specifically adjusted, such that the compounding of the matrix resin and the glass fiber is well achieved, and the problems of poor fluidity, poor demolding property and poor surface smoothness of the composite material caused by the addition of the large amount of the glass fiber can be significantly improved only by adding the small amount of the ABS resin; meanwhile, the glass fibers with specific sizes are selected in a targeted manner, so that the glass fibers are dispersed more uniformly in the resin, the compounding effect of the glass fibers and the matrix resin is further improved, the corresponding performance of the composite material is improved, and large-scale production and application of the fan blade are facilitated.

The present invention relates to the technical field related to simulation configuration, specifically including a method for assembling a gland and a diaphragm of a water level sensor in combination with simulation, the method comprising: acquiring parameters according to a working scenario, constructing a watershed simulation map; collecting data under standard conditions, fitting simulation components, establishing an assembly model, and obtaining an assembly matching scheme including the gland and diaphragm matching process. The technical problem that the assembly of the gland and diaphragm of a water level sensor depends on empirical rules under complex working conditions, directly affecting the sealing performance and pressure response sensitivity of the water level sensor, thereby affecting the performance of the sensor, is solved, and the effect of different working conditions on the assembly of the gland and the diaphragm is comprehensively analyzed by constructing a watershed simulation map and using a comprehensive analysis of fluid dynamics and structural mechanics, avoiding assembly errors caused by empirical rules, optimizing the matching parameters of the diaphragm and the gland through simulation, and ensuring that the impact of the assembly process on the performance of the water level sensor is controllable.

The present invention discloses a hardware implementation method for optimizing KV storage performance based on configurable logic, including the following hardware implementation process: using CRC as a HASH function, and supporting 17 options, namely CRC16 to CRC32; using a chain address method to solve the HASH conflict problem, and the same chain is arranged from small to large according to the size of the key; adjusting the number of entries in the HEAD ZONE by adjusting the HASH function; wherein Key_info_buf is a unit containing a key and a pointer to a value. The present invention is a study based on a new KV storage form, KV-SSD, based on the implementation of HASH, hardware acceleration is achieved through a configurable logic, and the read and write performance can be adjusted in real time according to actual applications.

The invention relates to a fusidic acid cream in-vitro release analysis method, which relates to the technical field of medicine, and comprises the following steps: taking a fusidic acid cream sample to be detected, smearing the fusidic acid cream sample on a filter membrane, placing the filter membrane on a transdermal instrument, enabling a sample-free layer of the filter membrane to face downwards and face a receiving pool, carrying out closed-loop sample loading, adding a receiving medium into the receiving pool, and operating according to a method set by the transdermal instrument, and taking the receiving liquid in the receiving pool at different times for detection. According to the in-vitro release method, a vertical diffusion cell is selected, a cellulose acetate membrane is selected as a filter membrane, and a phosphate buffer solution containing an organic solvent is selected as a receiving medium, so that the release rate and degree of fusidic acid from a matrix can be accurately evaluated, the quality of fusidic acid cream can be controlled, the performance of a preparation can be evaluated, and the safety of a product can be improved. The method can quickly evaluate the drug performance, and is low in cost, short in period, green and environment-friendly.

The invention discloses a narrow metal channel inner wall super-smooth structure and a preparation method and application thereof, and relates to the technical field of material surface machining. The super-lubricity structure comprises a graded micro-nano coarse structure formed on the inner wall of a narrow metal channel through high-pressure permeable reaction etching, and reactive silicone oil grafted on the graded micro-nano coarse structure through a modified intermediate, according to the preparation method, a rough structure with different pore diameters is formed through high-pressure permeation reaction etching, so that the uniformity of the rough structure is remarkably improved, silicone oil can better reside in the rough structure, and the stability and wear resistance of the rough structure are remarkably enhanced; meanwhile, silicone oil is grafted on the coarse structure through the modified intermediate, the silicone oil can form a more stable flowing lubricating layer, and the wear resistance is better and further improved. The super-lubricity structure can obviously reduce the flow resistance in the channel, has excellent wear resistance and stability, and is suitable for large-scale popularization and application in the treatment of reducing the flow resistance of the narrow channel.

The invention discloses a preparation method of a poly-citric-acid-based viscous composite coating, which comprises the following steps: step 1, dissolving citric acid, adding polyethylene glycol and 1, 8-octylene glycol, dropwise adding acrylic acid, stirring, and sequentially dissolving, dialyzing, purifying and vacuum freeze-drying to obtain a double-bond poly-citrate prepolymer; step 2, mixing polylysine with the double-bond polycitrate prepolymer to obtain a polycitrate composite solution; step 3, dropwise adding the poly-citrate composite solution to the surface of a matrix, and carrying out thermocuring to obtain a poly-citric acid-based viscous composite coating; the invention further discloses application of the poly-citric acid-based viscous composite coating. Acrylic acid is added into a prepared poly-citric acid prepolymer system to generate a double-bond poly-citrate prepolymer, polylysine is added to form a poly-citrate composite solution, the poly-citrate composite solution is thermally cured to form the poly-citric acid-based viscous composite coating with strong adhesive force, and the poly-citric acid-based viscous composite coating is suitable for the technical field of degradable biomedical materials.

The invention provides a preparation method of a multi-component structure gradient material and a gradient structure, and relates to the technical field of functional gradient structural design, the preparation method comprises the steps that a component gradient model and a structural gradient model are built through simulation software, the component gradient model comprises a plurality of single-component wafers with different densities, and the structural gradient model comprises a plurality of single-component wafers with different densities; the structure gradient model comprises a plurality of regulation and control structure elements with the same size; a plurality of regulation and control structure elements are arranged on the upper surface of the component gradient model in a preset arrangement mode, so that a multi-component gradient structure model is formed, and the sectional area of the structure element model is gradually increased from the direction away from the component gradient model to the direction close to the component gradient model; and the multi-component gradient structure corresponding to the multi-component gradient structure model is prepared on the basis of printing parameters and the 3D printing technology, the printing parameters comprise the single-component wafer layer thickness, the exposure intensity and the printing speed, and the impedance adjustable range of the structure gradient material can be improved easily.

The invention discloses a friction material with modified amorphous graphite as a friction performance modifier, a preparation method and application, and belongs to the technical field of friction materials. The friction material comprises the following components in parts by mass: 13-18 parts of phenolic resin, 17-23 parts of a fiber reinforced material, 5-15 parts of modified amorphous graphite and 40-60 parts of filler, the modified amorphous graphite is prepared by the following method: (1) crushing and grinding amorphous graphite, and sieving with a 100-300-mesh sieve to obtain amorphous graphite powder; (2) placing the amorphous graphite powder in a vacuum environment, heating the amorphous graphite powder to 600-1000 DEG C, and keeping the temperature for 4-6 hours; and (3) naturally cooling the amorphous graphite powder treated in the step (2) to room temperature to obtain the modified amorphous graphite. The friction material adopts the modified amorphous graphite as a friction performance regulator, the crystallinity of the modified amorphous graphite is increased, and the wear resistance is improved, so that the friction material has high wear resistance and stable friction coefficient, and is suitable for preparing brake products such as automobile brake pads.

The invention discloses a method for preparing a perovskite nanowire based on room-temperature in-situ self-assembly, the size of the perovskite nanowire is directionally increased through self-assembly growth of a precursor in a solution on the edge of a small-size CsPbBr3 nanocrystal at room temperature, meanwhile, the cross section size of the nanowire is not changed, and the narrow-band-gap optical characteristic is still kept; the all-inorganic perovskite nanowire with smaller surface atom proportion can be obtained through self-assembly at room temperature, higher crystal growth quality can be obtained through the slow growth process at room temperature, the process is beneficial to reducing the internal defect state of the nanowire, and then the optical performance and stability of the perovskite nanowire luminescent material are enhanced; the room-temperature in-situ self-assembly preparation method is simple and efficient, the preparation cost of the perovskite nanowires is reduced, large-scale controllable preparation of the high-quality perovskite nanowires can be realized, and fundamental research on photophysical properties based on the perovskite nanowires and practical application of optoelectronic devices of the perovskite nanowires are promoted.

The application provides a multi-stimulus response shape memory polyurethane composite material and application thereof. The composite material comprises a shape memory polyurethane material and a nano-functional filler, and the nano-functional filler is uniformly embedded in the shape memory polyurethane material. The provided composite material can realize multi-stimulus response and has excellent performance.

The invention discloses a high-temperature-resistant friction material, a preparation method and application. The high-temperature-resistant friction material comprises the following components in parts by mass: 10-20 parts of ammonium polyphosphate modified phenolic resin, 20-35 parts of a fiber reinforced material, 1-15 parts of a friction performance regulator and 30-45 parts of filler. According to the preparation method of the high-temperature-resistant friction material, the ammonium polyphosphate modified phenolic resin is directly and physically mixed with the phenolic resin through ammonium polyphosphate and then mixed with components of other friction materials, curing and synchronous generation are achieved in the subsequent friction material preparation process through hot pressing, the preparation method is easy to operate and low in preparation cost, and product performance is easy to control. The physical blending mode not only does not change the production process of the phenolic resin of the original factory, but also can be seamlessly connected with the preparation of the subsequent friction material, and is suitable for large-scale production. The high-temperature-resistant friction material is good in heat resistance, and the mechanical property and the friction property of the high-temperature-resistant friction material are superior to those of similar products. The high-temperature-resistant friction material provided by the invention is suitable for preparing brake products.

The invention discloses a preparation method of an alumina-based thermal insulation material with a controllable pore structure, and the specific technical scheme is as follows: firstly uniformly mixing 85-95% by mass of waste alumina powder and 5-15% by mass of a magnesium oxide additive, then pressing into a green body by a cold isostatic press under 10-30MPa, and finally calcining the green body at 1100-1200 DEG C for 2-4 hours to obtain the alumina-based thermal insulation material with the controllable pore structure. And cooling along with the furnace to obtain the alumina-based thermal insulation material. The raw materials used in the invention are industrial wastes, and non-renewable ore resources are replaced, so that the resource recycling efficiency is improved while a large amount of cost is saved. The pore structure of the prepared thermal insulation material can be regulated and controlled by adjusting the granularity and proportion of the magnesium oxide additive, the porosity is further increased, the heat conductivity coefficient is reduced, the comprehensive performance is greatly improved, and the thermal insulation material is suitable for large-scale industrial popularization.

The invention discloses polyesterimide resin as well as a preparation method and application thereof. The polyesterimide resin is prepared from the following raw materials: iminodiacetic acid dialkyl ester, unsaturated binary acid, saturated binary anhydride, amino-containing aromatic binary acid and a monohydric alcohol end-capping reagent, the polyesterimide resin disclosed by the invention can obtain high-content and uniformly-distributed imino groups in a main chain, provides more uniform cross-linking sites, is beneficial to mixing and dissolving with organic resins such as epoxy, alcohol acid and vinyl, and can also form more chemical bonds among molecular chains of the polyesterimide resin, so that the overall performance of the material is improved, and the service life of the polyesterimide resin is prolonged. Meanwhile, the polyesterimide resin disclosed by the invention has the advantage of controllable molecular chain length, and the flowability and permeability are improved; practice shows that the polyesterimide resin disclosed by the invention has relatively excellent mechanical property, electrical property, heat resistance and degradation resistance.

The invention relates to a double-faced adhesive tape-like viscous polymer solid electrolyte membrane and a preparation method thereof, the electrolyte membrane has characteristics similar to that of a double-faced adhesive tape, a porous membrane is used as a three-dimensional network skeleton to provide mechanical strength for the electrolyte membrane, and on the basis, the electrolyte membrane is compounded with a lithium salt, an ionic conductive polymer and an ionic liquid to adjust the proportion of the ionic liquid, so that the electrolyte membrane is prepared. And the similar double-faced adhesive tape type viscous polymer solid electrolyte membrane can be obtained. The preparation method is simple, the obtained viscose type solid electrolyte membrane has high room-temperature ionic conductivity, strong mechanical performance and good stability, the viscosity of the membrane can provide a new bonding process for preparation of a lithium ion battery, positive and negative electrodes can be rapidly and efficiently bonded, bonding is firm, safety and reliability are achieved, a traditional lithium ion battery preparation process can be simplified, and the production cost is reduced. The preparation efficiency of the lithium ion battery is greatly improved, and the production cost of the lithium ion battery is reduced.

The invention provides a heterogeneous hardware platform-oriented automatic AI algorithm model deployment method. The method comprises the following steps of: obtaining a to-be-deployed AI algorithm model and a heterogeneous hardware platform; creating an AI algorithm model deployment task, and setting model adaptation task parameters; constructing a model lightweight algorithm library and a rule constraint engine, and establishing an exception handling mechanism; performing model lightweight and unified representation based on a rule constraint engine and an exception handling mechanism to form a recommended AI algorithm model; matching the recommended AI algorithm model with a heterogeneous hardware platform; and performing performance evaluation based on a heterogeneous hardware platform test environment. According to the automatic AI algorithm model deployment method oriented to the heterogeneous hardware platform, an AI algorithm automatic deployment process is designed and a rule constraint engine and an exception handling mechanism are constructed based on quantization, pruning, distillation and other model optimization algorithms, automatic model efficient deployment of the model is realized, and meanwhile, the performance of the deployed model is prevented from being greatly reduced.

The present invention relates to a precursor for improving the properties of refractory materials for cement rotary kilns and its application. The precursor raw material contains the following substances in the following amounts: 1 part of magnesium nitrate hexahydrate, 1 part of lanthanum nitrate hexahydrate, 11 parts of aluminum nitrate nonahydrate, and 10-17 parts of citric acid monohydrate. The precursor prepared by the present invention has obvious flaky structural characteristics, can effectively play a role of overseas association in the material system, and improve the strength, thermal shock stability and resistance to alkaline medium erosion of the refractory material. The present invention also provides a refractory material containing the above-mentioned precursor. The periclase-magnesium aluminum spinel refractory material for cement rotary kiln prepared by the present invention is tested: the compressive strength is 85-110MPa; the residual flexural strength retention rate after 1100°C thermal shock 3 times air cooling is not less than 75%; no obvious erosion and penetration are found in the alkaline medium erosion resistance experiment.

The utility model relates to a cabin door self-locking mechanism which comprises a machine body, a front shell, a cabin door, a driving assembly, a cabin opening assembly and a self-locking assembly, the cabin opening assembly is in transmission connection with the driving assembly, and the lower edge of the cabin door is provided with a barrier strip; the cabin opening assembly comprises a rotating seat, a first driving end and a second driving end, and the first driving end and the second driving end are arranged on the two sides of the rotating seat respectively; the self-locking assembly comprises a first self-locking end, a second self-locking end and a reset tension spring, the middle of a whole formed by the first self-locking end and the second self-locking end is hinged to the inner side of the machine body, one end of the reset tension spring is connected with the second self-locking end, and the other end of the reset tension spring is connected with the machine body; the first driving end can drive the first self-locking end to rotate; the second driving end can drive the cabin door to open and close; and the second self-locking end can limit the rotation of the barrier strip in a reset state. A special cabin door opening structure is used, mechanical locking of the cabin door is unlocked while the cabin door is opened, and opening and closing actions and mechanical unlocking actions of the cabin door are simultaneously performed by using one driving motor.

The invention discloses a film material for laser transfer printing, and belongs to the technical field of laser transfer printing, the film material comprises a slurry transfer printing layer and a laser transmission layer which are bonded into a whole through an adhesive layer, and the slurry transfer printing layer is of a multi-layer structure comprising a surface layer, a middle layer and a bottom layer. And preferably designing material components, a mixing ratio and a set thickness of each structural layer, and adding corresponding assistants in the surface layer and the middle layer to finally obtain the film material suitable for laser transfer printing. The film material for laser transfer printing is simple in structure and reliable in performance, application in the laser transfer printing operation process can be effectively met, the arrangement and use reliability of the film material in the pattern processing process, the slurry filling process and the slurry laser transfer printing process is guaranteed, the slurry laser transfer printing efficiency and precision are improved, and the film material is suitable for large-scale popularization and application. The service life of the film material used as a transfer printing film is prolonged, and good practical value is achieved.

The application discloses a film material for laser transfer printing, and belongs to the technical field of laser transfer printing, which comprises a slurry transfer printing layer and a laser transmission layer which are bonded by an adhesive layer. The slurry transfer printing layer is provided as a multilayer structure including a surface layer, an intermediate layer and a bottom layer. The material composition, mixing ratio and thickness of each structure layer are further optimized, and the corresponding additives in the surface layer and the intermediate layer are added, so that the film material suitable for laser transfer printing is finally obtained. The film material for laser transfer printing has simple structure and reliable performance, can effectively meet the application in the laser transfer printing process, ensure the setting and use reliability of the film material in the pattern processing process, the slurry filling process and the slurry laser transfer printing process, improve the efficiency and precision of the slurry laser transfer printing, prolong the service life of the film material when used as a transfer film, and has good practical value.

This invention discloses a phosphorus-containing multi-arm hyperbranched resin, its preparation, and its application as an intrinsically flame-retardant multifunctional adhesive. The phosphorus-containing multi-arm hyperbranched resin is prepared by a method comprising the following steps: Step 1, using an α-diimide palladium catalyst to catalyze the polymerization of ethylene and 2-(2-bromoisobutyryloxy)ethyl acrylate to obtain a bromo-based multi-arm hyperbranched resin; Step 2, polymerizing the bromo-based multi-arm hyperbranched resin with glycidyl methacrylate to obtain an epoxy-based multi-arm hyperbranched resin; Step 3, subjecting the epoxy-based multi-arm hyperbranched resin to a ring-opening reaction with 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide to obtain a phosphorus-containing multi-arm hyperbranched resin. This invention provides the application of this phosphorus-containing multi-arm hyperbranched resin as an intrinsically flame-retardant multifunctional adhesive, possessing both excellent bonding and flame-retardant properties, and offering advantages such as low cost, controllable performance, simple process, and suitability for large-scale production and application.

The present invention belongs to the technical field of resource utilization of textile waste and preparation of carbon fiber composite catalyst, and provides a metal-supported carbon fiber catalyst prepared by using textile waste, and its preparation method and application. The textile waste is first activated with H3PO4, impregnated with a metal salt solution, and then dried and calcined at high temperature under an inert atmosphere to obtain a metal-supported carbon fiber catalyst. A metal-supported carbon fiber catalyst is prepared by a one-step calcination method, and is applied to activate persulfate to efficiently degrade refractory organic pollutants in wastewater. The obtained material has a high specific surface area and abundant oxygen-containing functional groups, and the metal active components are uniformly dispersed on the surface of the carbon fiber in the form of C‑O‑R bonds, forming a poor / rich electron center on the catalyst surface. The catalyst can better adapt to the complex conditions of wastewater, and exhibits ultra-high catalytic degradation activity for a variety of pollutants under different anion interferences and different environmental conditions. It has the advantages of low cost, simple process, high processing efficiency, good adaptability, etc.

The present application relates to a kind of rare earth complex light stabilizer and its preparation method and use, the rare earth complex light stabilizer includes [Ce (triRNTB) 2]X3 And / or RE (BP) 3, the rare earth complex light stabilizer includes 40-100 parts by weight of [Ce (triRNTB) 2]X3 And 0-60 parts by weight of RE (BP) 3.The present application uses the rare earth complex as new functional additive is introduced into organic fluorescent dye light conversion system.By constructing "light conversion-stable" dual functional composite system, both can solve the light stability bottleneck of small molecule dye, also can realize light conversion efficiency compensation using the light-induced luminescence enhancement effect of complex.The strategy provides innovative material design ideas for developing long life, high stability blue light conversion film, and has important practical significance for promoting the technology upgrading of light conversion material.

The invention relates to the field of biological medicines, and particularly relates to a composition for magnetic ultrasound contrast agent, a magnetic ultrasound contrast agent, a magnetic microbubble ultrasound contrast agent, and a preparation method thereof. The composition for magnetic ultrasound contrast agent includes a lipid, a surfactant and a magnetic nanoparticle; the surfactant consists of a surfactant A and a surfactant B, the surfactant A is in a free state, and the surfactant B is in a bonding state and is modified on the surface of the magnetic nanoparticle; the HLB value of the surfactant A is greater than 8. The magnetic microbubble ultrasound contrast agent obtained from the composition for magnetic ultrasound contrast agent has higher stability and may meet requirements for in vivo cyclic targeted delivery, thereby achieving the local high-concentration targeted delivery of a medication.