13results about How to "Reduce crosslinking" patented technology

The invention discloses a low-odor soft TPE (thermoplastic elastomer) composite material and a preparation method thereof, and the composite material comprises the following components in parts by weight: 50-100 parts of TPE, 5-20 parts of a deodorant, 150-600 parts of a plasticizer, 1-10 parts of an antioxidant, 1-5 parts of a light stabilizer, 0-20 parts of calcium stearate, 2-10 parts of nano silicon dioxide, 1-5 parts of an organic silicon modifier and 50-150 parts of a bio-based plasticizer. 1-5 parts of nano titanium dioxide, 0.1-1 part of graphene nanosheets and 1-5 parts of a metal organic framework compound; 0.01-0.5 part of carbon nanotubes, 0.5-2 parts of a self-repairing polymer containing microcapsules, and 1-10 parts of an antibacterial agent. By adding the novel deodorant, peculiar smell molecules generated in the hot melting process are effectively captured, adsorbed and degraded, the smell of the product is remarkably reduced, and more comfortable user experience is provided.

The invention belongs to the field of sulfone polymer materials, and particularly relates to a sulfone polymer with narrow molecular weight distribution and low gel content and a preparation method thereof. The preparation method comprises the following steps: 1) adding an organic bisphenol compound, 4, 4 '-dichlorodiphenyl sulfone, a salt-forming agent and a purified aprotic polar solvent into a reactor, uniformly stirring and mixing the system, then carrying out deoxygenization operation, and controlling the oxygen content in the system to be less than or equal to 100ppm; and 2) after the replacement is completed, introducing inert gas (such as nitrogen) into the system for a long time, and carrying out two-stage heating reaction under the condition to obtain a viscous sulfone polymer solution. The molecular weight distribution of the sulfone polymer is less than 3, and the gel structure content is greater than 0 and less than 3 mol%. The oxygen content in a reaction system is reduced, and generation of polymer free radicals is reduced, so that the gel structure content is controlled, and the linear sulfone polymer material with narrow molecular weight distribution is obtained.

The invention relates to a thermoplastic composite material capable of absorbing X-rays and a preparation method thereof, and belongs to the technical field of high polymer materials, X-ray shielding materials such as nano Gd2O3 and Bi2O3 are modified by using a silane coupling agent, and the compatibility and dispersity of the X-ray shielding materials with thermoplastic matrixes such as high molecular weight polyethylene are enhanced through a chemical bonding effect. Meanwhile, modified graphene and sodium humate components are introduced, and a two-dimensional structure of graphene and a functional group of sodium humate interact with the nano shielding material and a matrix, so that the dispersity and the interface bonding force of the material are further improved. The preparation method has the advantages that effective dispersion and stabilization of the refined nanometer shielding material are realized, the composite material is guaranteed to keep a high shielding effect, meanwhile, the composite material has excellent mechanical properties and lightweight design, and a new thought and approach are provided for developing an efficient, lightweight and stable X-ray shielding material.

The application belongs to the technical field of microcapsules, and particularly relates to a preparation method of a composite probiotic capsule, which comprises the following steps: uniformly mixing probiotic bacterial liquid, fructooligosaccharide, tea polyphenol, grape polyphenol, mannan oligosaccharide, isomaltitol and an emulsifier to obtain a core material; uniformly mixing glycerol and distilled water, heating to 60-80 DEG C, sequentially adding modified gelatin, hydroxypropyl starch and chitosan, stirring for 10-30 min, sterilizing, and cooling to room temperature to obtain a capsule material; mixing the core material and the capsule material, performing high-pressure homogenization treatment, and then performing spray drying to obtain the composite probiotic capsule; and the modified gelatin is prepared by acylation reaction of succinic acid derivatives and gelatin. The composite probiotic capsule provided by the application has excellent storage stability, antioxidant property, anti-gastric juice erosion capacity, and also has good enteric solubility and bioavailability.

This invention relates to a metal ion crosslinking stabilizer. It primarily addresses the problems of existing gel profile control agents, such as short gelation time, easy damage to medium and low permeability layers during injection, and inability to achieve deep reservoir sealing. Its components and proportions by mass percentage are as follows: 1%-2% retarder, 3%-5% reinforcing agent, 1%-3% regulator, 4%-5% ion stabilizer, 1%-2% water purifier, and the balance being water. Preparation method: 1) Add the ion stabilizer and reinforcing agent to water according to the proportions and mix evenly in a 45°C water bath; 2) Add the regulator to the mixture and mix evenly; 3) Add the retarder and maintain the water bath for 2-3 hours; 4) Add the water purifier to obtain the target product. This metal ion crosslinking stabilizer can be used as an auxiliary additive component in the formulation of polyacrylamide ion crosslinking profile control agent systems. It can prolong the gelation time of the profile control agent, ensure the gel viscosity of the profile control agent, improve the stability of the profile control agent, and achieve effective sealing of the system.

The application discloses a high desalination reverse osmosis membrane and a preparation method thereof, and belongs to the technical field of reverse osmosis membrane preparation. The method comprises the following steps: (1) a first intermediate membrane is obtained by casting a polysulfone film solution on a non-woven fabric layer and then solidifying; (2) the first intermediate membrane is immersed in an aliphatic biological amine solution, a first polyacyl chloride solution is poured onto the surface of the polysulfone porous layer, the membrane sheet is transferred to hot water to hydrolyze the acyl chloride groups into carboxyl groups, and a second intermediate membrane with a first polyamide layer is obtained; (3) the second intermediate membrane is immersed in a polybasic aniline solution, a second polyacyl chloride solution is poured onto the surface of the first polyamide layer, heat treatment is carried out after a certain time of reaction, and finally hot water is used for cleaning, and the high desalination reverse osmosis membrane is obtained. The application constructs a double-layer polyamide reverse osmosis membrane with gradient pore size and interfacial interlocking through a two-step differential interface polymerization process, has ultra-high desalination rate, high water permeation flux, excellent long-term stability and industrialization value, and is suitable for various water treatment scenes.

The invention discloses a donkey-hide gelatin cubilose with high water absorption rate and a preparation method thereof, and the preparation method of the donkey-hide gelatin cubilose comprises the following steps: carrying out steaming pretreatment on cubilose, and then carrying out freeze thawing treatment; soaking the treated cubilose in water until the cubilose is fully puffed; adding water into donkey-hide gelatin, heating and dissolving to form a donkey-hide gelatin solution And then adding the soaked cubilose into the donkey-hide gelatin solution for stewing, and immediately exhausting steam and cooling after heating is completed to obtain the donkey-hide gelatin cubilose product. By introducing a pretreatment process combining steaming and freeze thawing and matching with a reasonable stewing and cooling mode, the water absorption rate of the cubilose is effectively improved under the condition that the donkey-hide gelatin is added, and the problem of insufficient water absorption of a compounded product is improved; the obtained donkey-hide gelatin cubilose has the advantages of stable structure, full puffing, uniform texture, high nutrition compound degree and the like, and is suitable for industrial production, popularization and application of food.

The invention relates to a metal ion crosslinking stabilizing and retarding agent. The problems that an existing gel profile control agent is short in gelling time, middle and low permeability layers are prone to being damaged in the injection process, and deep plugging of oil reservoirs cannot be achieved are mainly solved. The water purifying agent comprises the following components in percentage by mass: 1%-2% of a retardant, 3%-5% of a reinforcing agent, 1%-3% of a conditioning agent, 4%-5% of an ion stabilizer, 1%-2% of a water purifying agent and the balance of water. The preparation method comprises the following steps: 1) adding the ion stabilizer and the enhancer into water in proportion, and uniformly mixing in a water bath at 45 DEG C; (2) adding a regulator into the mixed solution, and uniformly mixing; the metal ion crosslinking stabilizing and retarding agent can be used as an auxiliary additive component for preparation of a polyacrylamide ion crosslinking profile control agent system, and can prolong the gelling time of the profile control agent, ensure the gelling viscosity of the profile control agent, improve the stability of the profile control agent and realize effective plugging of the system.

The invention discloses a multi-layer vulcanization forming process of a luminous rubber football, and belongs to the technical field of rubber football preparation. The multi-layer vulcanization molding process of the luminous rubber football comprises the following steps: step (1), mixing composite rubber, a modified anti-aging agent and a vulcanizing agent by using an internal mixer and an open mill to prepare a rubber sheet; (2) preparing the rubber sheet into a ball bladder blank by using a forming machine, mounting a luminous carrier on the surface of the ball bladder blank, and heating and vulcanizing to obtain a luminous ball bladder; (3) the surface of the luminous bladder is wound with yarn, then the luminous bladder continues to be wrapped with the rubber sheet, the luminous bladder is put into a heatable football mold, and a formed football blank is obtained through vulcanization forming; and (4) the surface of the formed football blank is processed, and the luminous rubber football is obtained. The rubber football prepared by the method has excellent elasticity, self-repairing capability and ageing resistance.

The invention provides a comprehensive data acquisition and recording system architecture. The comprehensive data acquisition and recording system architecture comprises a parameter acquisition module, a protection recorder and a cache recording device which are arranged in an airborne computer / equipment, the cache recording device comprises a flight parameter cache recording device and a video cache recording device; a parameter acquisition module in the airborne computer / equipment is integrated in the airborne computer / equipment and is responsible for sending related sensor data input of computer / equipment function implementation, data input from other systems and own parameter calculation results to a protection recorder and a cache recording device through a bus; the protection recorder is cross-linked with the parameter acquisition modules in the plurality of airborne computers / devices to record various helicopter data; the flight parameter cache recording device is used for receiving the flight parameters provided by the flight control system and recording the flight parameters in a flight parameter cache recording card; and the video cache recording device is used for receiving display pictures, internal and external pictures and internal calls in the comprehensive display system and recording the pictures in the video cache recording card. The flight parameter collecting and recording system is restructured, so that the purposes of modularization, light weight and high efficiency are achieved.

The invention discloses a hydrogel-based composite film integrating efficient phase change cooling, high thermal conductivity, electromagnetic shielding and leakage prevention and a preparation method of the hydrogel-based composite film. The thin film is of a double-layer composite structure, wherein the lower layer is a high-thermal-conductivity electromagnetic shielding layer composed of polyacrylamide (PAM) hydrogel, Si3N4 and electromagnetic shielding filler, and the upper layer is a phase-change leakage-proof layer composed of PAM hydrogel and polyethylene glycol (PEG); the upper layer and the lower layer form a stable integrated structure through the synergistic effect of interface hydrogen bonds and physical entanglement, and finally integration of thermal management and electromagnetic protection functions is achieved. The phase change latent heat of the prepared film is larger than or equal to 120 J / g, the X-band electromagnetic shielding effectiveness (SE) is larger than or equal to 32 dB, and leakage is avoided at the high temperature of 80 DEG C. The preparation process is simple, and the product can be applied to various scenes such as power chips, LED equipment and wearable electronic devices.

The invention belongs to the technical field of thickening agents, and particularly relates to a preparation method of an easily-crosslinked polyacrylamide thickening agent, which comprises the following steps: (1) outer layer coating of a hydrolytic agent sodium carbonate, (2) liquid preparation of an acrylamide aqueous solution, (3) nitrogen introduction and oxygen removal of the acrylamide aqueous solution, (4) initiation polymerization of the acrylamide aqueous solution, and (5) hydrolysis of a polyacrylamide gel block. And (6) powdering and detecting the polyacrylamide. By adding the hydrolytic agent with the coating film, the polymerized polyacrylamide is uniformly hydrolyzed, carboxylate radicals are uniformly distributed, the probability of cross-linking among polyacrylamide molecules is greatly increased, and a temperature-resistant, salt-resistant and shear-resistant three-dimensional network structure is formed by cross-linking. The product quality indexes are as follows: the solid content is 89-91%, the molecular weight is greater than or equal to 2,000,000, the anion degree is 10-20%, the crosslinking rheological viscosity is greater than 150 centipoises, the crosslinking can be hung, and the requirements of low-permeability and ultra-low-permeability reservoirs and compact oil and gas reservoirs on the thickening agent are completely met.

The present invention relates to the field of polymer technology, and specifically discloses a high-barrier biomedical consumable and a preparation method thereof, wherein the consumable comprises the following raw materials in parts by weight: 50-80 parts of modified polypropylene resin, 1-3 parts of a cross-linking agent, 0.8-2.5 parts of an auxiliary cross-linking agent, and 0.2-0.8 parts of a dispersant; wherein the cross-linking agent is an organic peroxide cross-linking agent, and the number of the contained -O-O- groups is 1-2. The consumable provided by the present invention is a high-performance polypropylene consumable containing a cross-linking agent, having excellent cross-linking effect, good barrier properties, excellent mechanical properties, and strong dimensional stability. When applied to biomedical consumables such as polypropylene blow-injected medicine bottles and bottle caps, the performance advantages are significant.