15results about How to "Avoid osmosis" patented technology

The invention relates to a high-antibacterial absorbable medical suture and a preparation method thereof, and belongs to the technical field of medical materials. According to the suture line, PPDO serves as a base material, PLGA is introduced to wrap TCS through a melt blending and spinning technology, and a TCS-coated PLGA core-shell structure antibacterial agent is prepared. A gradient degradation release system is constructed by utilizing the characteristic that PLGA is faster in degradation than PPDO, so that TCS is slowly and continuously released, and the defects of explosive release and insufficient later concentration of drugs in a traditional direct blending method are overcome. Meanwhile, the core-shell structure effectively avoids destructive pores formed in a PPDO matrix due to rapid dissolution of drugs, and greatly maintains the mechanical integrity of the matrix, so that the suture line can provide stable supporting force similar to that of a pure PPDO line in a key healing period in vivo, and the synergism and unification of long-acting antibacterial property, lasting mechanical supporting property and high operation reliability are realized.

The invention belongs to the technical field of fuel cell proton exchange membranes, and discloses a cross-linking type polybenzimidazole proton exchange membrane with oxidation resistance and high proton conductivity and a preparation method of the cross-linking type polybenzimidazole proton exchange membrane. According to the cross-linking type polybenzimidazole, after polymerization of raw material monomers is completed, a silane coupling agent is added as a cross-linking agent, and polybenzimidazole containing the cross-linking agent is obtained through reaction. The polybenzimidazole containing the cross-linking agent can be prepared into a cross-linking type polybenzimidazole proton exchange membrane by using a solution casting method. According to the cross-linked polybenzimidazole disclosed by the invention, a stable and uniform Si-O-Si cross-linked network is constructed by adding the cross-linking agent and taking a hydroxyl group on the polybenzimidazole as a main reaction site, so that synchronous improvement of antioxidant stability and proton conductivity is synergistically realized. The polybenzimidazole proton exchange membrane containing the cross-linking agent has a good application prospect in the aspect of proton exchange membrane fuel cells.

The invention relates to the field of anticorrosive paint, in particular to hyperbranched epoxy resin anticorrosive paint and a preparation method thereof. The coating is a two-component system, wherein a component A comprises an epoxy resin main body, 5-20 parts of a hydroxyl-terminated hyperbranched polyester modifier, a flaky filler, an anti-rust pigment, a reactive diluent and an auxiliary agent; the algebra of the hyperbranched polyester is G2-G4, and the hyperbranched polyester is prepared by melt polycondensation of trimethylolpropane and 2, 2-dimethylolpropionic acid; and the component B is a polyamide curing agent. The preparation method comprises the following steps: synthesizing hyperbranched polyester; pre-mixing the component A with epoxy resin, grinding and dispersing with filler and auxiliaries, and mixing paint to obtain a component A; mixing a curing agent with a coupling agent to obtain a component B; by utilizing the unique structure of the hyperbranched polyester, the epoxy coating is obviously toughened on the premise of not losing the hardness, the viscosity of the system is reduced, the constructability and the filler dispersity are improved, and finally the high-performance coating with impact resistance, strong adhesion and long-acting corrosion resistance is obtained.

The present application relates to the technical field of paint, in particular to a polyurethane powder coating with good heat preservation and insulation performance, which is configured according to the mass fraction of each raw material: 25-40 parts of hydroxyl acrylic acid resin; 10-20 parts of hexamethylene diisocyanate trimer; 8-18 parts of rice husk ash derived porous silica microspheres; 5-15 parts of waste tire rubber powder modified carbonized particles; 3-8 parts of functional filler; 0.5-1.5 parts of polyethylene wax leveling agent; and 0.2-0.8 parts of polyether modified silicone defoaming agent. In the present application, the thermal bridge effect caused by interface defects can be reduced, the porous structure can significantly reduce the overall thermal conductivity of the coating through the synergistic effect of scattering thermal radiation, inhibiting gas molecular convection and conduction and prolonging the solid heat conduction path, and this structural characteristic makes it an ideal insulation functional unit, thereby greatly improving the heat preservation performance of the coating.

This invention belongs to the field of environmentally friendly fuel technology, specifically relating to a method for preparing a green, low-carbon, and highly efficient modified fuel for alcohol-hydrogen engines. This invention comprehensively improves fuel performance through a progressive synergistic architecture of a bio-methanol platform – an oxygen-containing combustion-promoting system – a stability barrier – and a low-energy-consumption blending path. Using bio-methanol as a base, it optimizes combustion by compounding with oxygen-containing components such as 2-MTHF and DMM / MF, achieving rapid ignition, emission reduction, and noise reduction. Phase behavior is regulated by isobutanol and polyether-modified silicon, achieving a reversible and stable phase without the need for high-HLB surfactants, preventing deposition and gas lock. A four-fold protective barrier is constructed using GMO and fluorinated silica polyethers, combined with antioxidant synergy to achieve corrosion resistance and aging resistance. The process adopts a sequential design of front-end purification – mid-stage two-phase construction – and end-stage static mixing, achieving low-energy homogenization and ensuring storage, transportation, and operational stability.

The invention discloses a tulobuterol transdermal patch with a gradient drug release structure and a preparation method of the tulobuterol transdermal patch, belongs to the technical field of transdermal drug delivery systems, and aims at solving the problems that an existing single-layer tulobuterol patch takes effect slowly and is insufficient in later-stage drug release power. The transdermal patch sequentially comprises a backing layer, a gradient medicine-containing substrate layer and an anti-sticking release layer from top to bottom, the gradient drug-containing matrix layer comprises a high-concentration top long-acting drug release layer containing tulobuterol-mesoporous silica nanoparticles and a silicone adhesive, a middle-concentration middle stable drug release layer containing an SIS hot melt adhesive, and a low-concentration bottom quick-acting contact layer containing a specific penetration enhancer composition and an acrylate adhesive from top to bottom in sequence. Through the synergistic effect of bottom-layer penetration promoting driving, middle-layer stable transition and top-layer nanometer storage cavern relay, the traditional concentration barrier is broken through, and rapid effect taking within 1-2 hours and stable-state long-acting drug release within 24 hours or above are perfectly considered.

The utility model discloses a kind of anticorrosive structures of concrete pool, the anticorrosive structure includes a concrete pool main body and a anticorrosive structure main body being set in the concrete pool main body, the anticorrosive structure main body includes sequentially connected from bottom to top: a reinforced concrete component layer being fixedly connected at the bottom of the concrete pool main body;A waterproof layer;A first vinyl resin layer;A glass fiber short-cut felt layer;A second vinyl resin layer;A first glass fiber layer;A third vinyl resin layer;A second glass fiber layer;A fourth vinyl resin layer;A third glass fiber layer;And a fifth vinyl resin layer.The utility model effectively solves the problem that the anticorrosive force of existing concrete pool is limited, and corrosion failure is likely to occur during long-term use, and concrete pool is also likely to crack and permeate, which affects normal use.

The present application relates to chip technology field, specifically a kind of coreless substrate manufacturing method.It is characterized in that: including the following steps: S1, laser slot is opened on substrate, and chip is buried in slot;S2, filling colloid;S3, laser hole is shot;S4, filling laser hole, while using 3D printing to print L1 circuit layer;S5, form L2 copper layer;S6, form L2 circuit layer;S7, form L3 copper layer;S8, punch in L3 copper layer;S9, form L3 circuit layer, and connect L1 circuit layer, L2 circuit layer, L3 circuit layer;S10, make solder resist layer and copper surface opening;S11, cutting.Compared with prior art, in chip is placed on the substrate of organic polymer resin, with the rigidity of organic resin bearing, the yield can be avoided to be influenced because of board warping during manufacturing process.3D printing technology and traditional coreless substrate manufacturing technology can shorten the manufacturing process of substrate, save cost and substrate manufacturing time, can improve the efficiency of substrate manufacturing.

The invention provides a resin composition, application of the resin composition in preparation of a copper-clad plate and the copper-clad plate, and relates to the technical field of copper-clad plate preparation, and the resin composition comprises the following raw materials: hydroxyl-modified low-molecular-weight polyphenyl ether, bismaleimide resin, a trifluoromethyl-containing bifunctional isocyanate cross-linking agent, a filling material and an initiator. A fluorine-containing polyurethane cross-linked network is constructed by introducing a trifluoromethyl-containing bifunctional isocyanate cross-linking agent, so that the water absorption and dielectric loss of the material are reduced, the dielectric stability after damp and hot is improved, and the heat resistance, dimensional stability and comprehensive reliability of a cured product are improved; therefore, the application requirements of high-frequency and high-speed copper-clad plates, antennas / radars and millimeter wave device materials are met.

This invention discloses a carbon-plastic bipolar plate for a zinc-bromine flow battery, its preparation method, and its application, belonging to the field of electrochemical energy storage technology. The method includes: dispersing nitrogen-doped hollow carbon nanotubes and spraying them onto the positive electrode side of a carbon-plastic bipolar plate; after drying, a nitrogen-doped hollow carbon nanotube-modified positive electrode carbon-plastic bipolar plate is obtained; dispersing boron-nitrogen co-doped carbon and spraying it onto the negative electrode side of a pretreated carbon-plastic bipolar plate, after drying again, a boron-nitrogen co-doped carbon-plastic negative electrode carbon-plastic bipolar plate is obtained. On the positive electrode side, the nitrogen-doped hollow carbon nanotubes catalyze the bromine reaction through nitrogen doping, reducing the overpotential; the hollow structure adsorbs bromine species and uses charge action to inhibit bromine permeation, reducing self-discharge. On the negative electrode side, the boron-nitrogen co-doped carbon uses B-N zinc-loving sites to guide uniform and dense zinc deposition, inhibiting dendrite formation; and inhibits hydrogen evolution through charge regulation. Both methods synergistically improve the bromine barrier performance, reaction kinetics, and dendrite suppression ability of the carbon-plastic bipolar plate.

The invention discloses a mechanical pressure automatic regulator of an underwater booster pump spacer fluid system. The mechanical pressure automatic regulator comprises a supply valve and a release valve. The supply valve is provided with a first transportation cavity and a first pilot cavity, a supply valve element control spacer fluid supply outlet is arranged in the first transportation cavity, a first pilot piston is arranged in the first pilot cavity and connected with the supply valve element through a first valve rod, the first valve rod is sleeved with a first corrugated pipe to form a first working medium cavity, and a first spring is arranged in the first transportation cavity. The release valve is provided with a second transportation cavity and a second pilot cavity, a release valve element control spacer fluid release outlet is formed in the second transportation cavity, a second pilot piston is arranged in the second pilot cavity and connected with the release valve element through a second valve rod, the second valve rod is sleeved with a second corrugated pipe to form a second working medium cavity, and a second spring is arranged in the second transportation cavity. On the basis of a pressure difference dominated adjusting mode, supply and discharge of the spacer fluid are automatically adjusted by sensing the pressure difference between the spacer fluid and the working medium, and the pressure balance of the system is maintained.

This invention relates to a salt spray resistant and anti-aging curing coating and its preparation method, belonging to the field of coating technology. The coating includes modified epoxy resin, ternary nanocomposite filler, composite light stabilizer, hydrophobic eutectic solvent, polysiloxane-modified aromatic amine curing agent, and bio-based polyurethane curing agent. The modified epoxy resin is prepared by reacting bisphenol F epoxy resin, KH-560 silane coupling agent, and tetrabutylammonium bromide, followed by the addition of bi-terminated epoxy silicone oil, 3,3'-dithiodipropionic acid, and p-toluenesulfonic acid, and then by adding pentaerythritol phosphate and antioxidant 1010. The polysiloxane-modified aromatic amine curing agent is prepared by reacting m-phenylenediamine as a matrix, KH-560 silane coupling agent, diphenylsilanediol, and dibutyltin dilaurate. The bio-based polyurethane curing agent is prepared by reacting castor oil-modified polyol, isophorone diisocyanate, dibutyltin dilaurate, dimethylolpropionic acid, and trimethylolpropane.

The application discloses a kind of high anti-sputtering drainage asphalt mixture and preparation method thereof, it is related to bitumen technical field.The raw materials of asphalt mixture include matrix asphalt, styrene-butadiene-styrene block copolymer, butyronitrile rubber microsphere, carboxyl silicone oil, composite modified aggregate, composite additive, graphene oxide mixed solution, calcium lactate.The preparation method of asphalt mixture includes the steps of composite modified aggregate preparation, preparation of graphene oxide mixed solution, preparation of composite additive, and preparation of asphalt mixture.The drainage asphalt mixture prepared by the application has strong anti-sputtering performance, excellent drainage performance and good anti-rutting performance.

The utility model provides a cleaning accessory of a mop, which comprises a collodion component, a cleaning component, a cleaning component and a cleaning component, wherein the collodion component is provided with a first collodion body and a second collodion body; the isolation part is arranged between the first collodion body and the second collodion body and used for preventing the cleaning liquid sucked in the first collodion body and the cleaning liquid sucked in the second collodion body from being mixed with each other; the technical problem that cleaning efficiency is affected due to insufficient cleanliness of cleaning liquid when the collodion is used on the front face and the back face of an existing mop cleaning head due to the fact that the cleaning liquid in the collodion is mixed and polluted is solved, and cross permeation and pollution of the cleaning liquid in the process that the front face and the back face are alternately used are avoided. Therefore, the cleaning liquid in the collodion body which is in contact with the ground for the first time is kept high in cleanliness during use, the dirt-removing power and the cleaning effect are improved, the cleaning liquid is not mixed any more, a user can conduct continuous or alternate cleaning operation through the first collodion body and the second collodion body in the actual use process, and the cleaning efficiency is improved. The collodion cotton part does not need to be frequently returned to be cleaned, and the cleaning interruption frequency in the cleaning process is reduced.

The utility model discloses a movable anti-aging outdoor house, which comprises a house body, a fixing assembly is arranged at the bottom of the house body, the fixing assembly comprises a bottom plate, a bottom frame, fixing frames, fixing frames and second bolts, the bottom plate is arranged at the bottom of the house body, the bottom frame is arranged at the bottom of the bottom plate, the fixing frames are uniformly arranged on the bottom frame, and the fixing frames are uniformly arranged on the bottom plate. Every two fixing frames form a group, the fixing frames are detachably arranged on the inner sides of the fixing frames in each group, the second bolts are detachably arranged between the fixing frames and the fixing frames, the house body is provided with a protection assembly, the protection assembly comprises a connecting frame, a protection frame and a roof, the connecting frame is arranged in the house body, and the protection frame is arranged on the roof. The protective frame is arranged on the top of the connecting frame, and the roof is installed on the top of the house body, so that the technical problem that in the background technology, after an existing outdoor house is moved to a preset position, an effective and convenient fixing device is lacked is solved.