29 results about "Electron beam radiation" patented technology

The invention discloses a wear-resistant environment-friendly PET base material adhesive tape and a preparation method thereof, and belongs to the technical field of adhesive tapes, raw materials comprise a PET adhesive tape film and an EB curing modified adhesive, the surface of the modified PET adhesive tape film subjected to corona treatment is coated with the EB curing modified adhesive, then electron beam radiation curing is carried out, the absorbed dose of electron beams is 38-42 kGy, and the EB curing modified adhesive is prepared. And then cooling, rolling and curing to obtain the wear-resistant environment-friendly PET base material adhesive tape. The modified PET adhesive tape film is prepared from the following raw materials: PET resin and modified polyolefin elastomer master batch; the EB curing modified adhesive is prepared from the following raw materials: butyl acrylate, 2-ethylhexyl acrylate, tripropylene glycol diacrylate, acrylate resin, urethane acrylate and starch modified core-shell microsphere powder. According to the mode, a modification process is added in the preparation process of the PET adhesive tape film and the adhesive, and finally the environment-friendly PET base material adhesive tape with excellent comprehensive performance is prepared.

The present disclosure provides a process. In an embodiment, the process includes providing a neat ethylene / propy-lene / non-conjugated polyene terpolymer (n-terpolymer) having a Mooney viscosity (ML (1+4) at 125C) less than 100 Mooney units (MU). The process includes exposing the n-terpolymer to electron beam radiation at a dosage from 0.2 megaRad (MRad) to 1.3 MRad. The process includes forming a branched ethylene / propylene / non-conjugated polyene terpolymer (b-terpolymer) having a Mooney viscosity ML (1+4) at 125C from 25 MU to 135 MU.

This invention discloses a self-reinforced polypropylene cable insulation material and its preparation method using a polypropylene graft copolymer, relating to the field of polymer materials. The preparation method includes: firstly, preparing a polypropylene graft copolymer via melt grafting or electron beam radiation grafting; subsequently, melt-blending the copolymer with polypropylene to prepare a primary masterbatch; and finally, melt-blending the primary masterbatch with polypropylene, an antioxidant, a voltage stabilizer, and processing aids to obtain the cable insulation material. This invention induces the matrix polypropylene to produce a β-crystal form through the polypropylene graft copolymer. The β-crystal form and polar vinyl monomers together achieve elastomer-independent self-reinforcement, simultaneously improving the material's toughness, heat resistance, and DC dielectric properties. This solves the performance degradation problem caused by traditional elastomer blending and is suitable for high-voltage DC cable insulation.

This invention discloses a shielding processing device and method for electron beam curing of workpieces, comprising a shell, a driving device, a moving shielding assembly, a gas filling device, and an electron beam radiation device. The shell has a first cavity and is provided with an inlet and an outlet communicating with the first cavity. The shell is also movably provided with an inlet gate and an outlet gate. The driving device is located in the shell. The moving shielding assembly includes a turntable and at least two gas baffles. The upper end of the turntable is divided into at least two conveying stations by the gas baffles. Each conveying station can independently connect to the outlet or the inlet as the turntable rotates. The gas filling device is located in the shell and is used to fill the conveying stations with protective gas. The electron beam radiation device is located in the shell and is used to output an electron beam to the conveying station that has been filled with protective gas. The above structure is compact and occupies little space. The gas baffles can not only prevent the protective gas from escaping, saving protective gas, but also prevent radiation leakage.

A method of reducing the titer of a biological contaminant in a biological product generally includes subjecting the biological product to electromagnetic energy having an ultraviolet (UV) wavelength or shorter in a dose effective to reduce biological contaminants in a sample of the biological product while maintaining integrity and function of the biological product. In one or more embodiments, the electromagnetic energy comprises UV-B, UV-C, X-rays, or γ-rays. In one or more embodiments, the method further includes subjecting the biological product to electron beam radiation.

An electron beam irradiation device is provided, which has a simplified vacuum chamber structure. An electron beam irradiation device (1) comprises: a cylindrical vacuum chamber (10) which accommodates an electrode assembly (14) for generating an electron beam; and a vacuum pump (20) which evacuates the interior of the vacuum chamber (10). An air inlet port (22) of the vacuum pump (20) is connected to an evacuation port (13) of the vacuum chamber (10).

The invention relates to the technical field of production of medical-grade polyvinyl chloride particles, in particular to a processing technology of special medical-grade polyvinyl chloride particles for gamma-resistant sterilization, which comprises the following steps: step S1, selecting raw materials; s2, raw material pretreatment: mixing the raw materials according to a set proportion, and premixing for 10-15 minutes through a high-speed mixer at a mixing rotating speed of 800-1200 rpm; s3, melt blending extrusion: adopting a single-screw extruder, and realizing extrusion by optimizing a screw structure and controlling temperature; step S4, pelletizing and collecting; and S5, sterilization treatment: carrying out ultraviolet sterilization, hydrogen peroxide steam sterilization and high-frequency pulse electron beam radiation sterilization treatment by adopting special sterilization equipment. In the actual use process, effective sterilization treatment of PVC particles is achieved from multiple angles, the phenomenon of thermal deformation of the PVC particles caused by a traditional sterilization mode is avoided in the sterilization treatment process, effective and uniform treatment is ensured in the sterilization treatment process, and the product quality is ensured.

The invention provides multifunctional bioadhesive hydrogel as well as a preparation method and application thereof, and relates to the technical field of biomedical materials. The preparation method comprises the following steps: dissolving dopamine modified gelatin (DA-Gel), sulphobetaine methacrylate (SBMA), acrylic acid (AA) and perfluoroalkyl ethyl methacrylate (PFEMA) in a dimethyl sulfoxide (DMSO) solution, uniformly stirring, injecting into a mold, carrying out cross-linking polymerization by adopting electron beam radiation without adding a chemical cross-linking agent, and preparing a hydrophobic film by adjusting the radiation absorption dose (0-50 kGy) and the hydrophobic monomer content. The mechanical property, the adhesion strength and the swelling behavior of the hydrogel can be accurately regulated and controlled, and the hydrogel with a three-dimensional interpenetrating network structure is obtained. The hydrogel prepared by the process can form rapid and tough adhesion on the surface of a moist tissue, effectively seal a wound, resist swelling in a body fluid environment and promote tissue regeneration, and has a wide clinical application prospect in the fields of wound hemostasis, surgical incision closure, viscera perforation repair and the like.

The application relates to the technical field of sterilization equipment, in particular to a disinfection and sterilization equipment for medical dressing production. The equipment comprises a shell, in which, along the clockwise direction, an upper feeding station, an ultraviolet station, an irradiation station, a detection station and a lower feeding station are sequentially arranged; the equipment further comprises a flow transfer table which is rotationally installed on the shell and periodically rotates clockwise by 72 DEG; five mutually isolated sterilization chambers are arranged in the flow transfer table; the top surface and the side surface of each sterilization chamber are open; a dressing clamping mechanism is arranged in each sterilization chamber; an ultraviolet lamp, an electron beam radiation source, a detector and two CCD cameras are respectively installed on the top of the shell; the dressing clamping mechanism comprises an inner frame fixed on the flow transfer table, a vibration excitation frame which is slidably connected to the inner frame, and a return spring which is installed between the inner frame and the vibration excitation frame. The application has the beneficial effect of solving the problem that the existing medical dressing disinfection and sterilization equipment cannot simultaneously realize deep sterilization and heat-sensitive active ingredient reservation.

The application belongs to the technical field of sewage treatment, and particularly relates to a method for degrading organic pollutants by using MOF catalysts in cooperation with electron beam irradiation technology, which comprises the following steps: (1) forming a saturated solution of rhodamine B and deionized water to prepare a rhodamine B aqueous solution; (2) adding metal organic framework materials as catalysts to the rhodamine B aqueous solution prepared in step (1) and uniformly mixing to prepare a mixed solution; and (3) performing electron beam irradiation on the mixed solution prepared in step (2) to degrade the rhodamine B organic pollutants. 2+ The method has the advantages that the degradation is performed at low temperature, the process is simple, controllability is high, and the degradation rate is obviously advantageous; the method has very high degradation efficiency in the process of treating high-concentration pollutants; the introduced catalysts can provide high-concentration Fe 2+ and O2, and can directly perform solid-liquid separation after degradation, so that secondary pollution of the catalysts is avoided, and the cost of sewage treatment is reduced.

A substrate inspection apparatus may include a stage on which a substrate is to be provided; an electron beam apparatus configured to generate and emit an electron beam onto the substrate, a laser assembly configured to generate a first light having a predetermined wavelength, a lamp assembly including a light source configured to generate and emit a multi-wavelength light, and an optical filter configured to pass a second light having a target wavelength, among the multi-wavelength light; and a processor configured to determine the target wavelength and control the electron beam apparatus, the laser assembly, and the lamp assembly to radiate the first light, the second light, and the electron beam onto the substrate.

The utility model relates to the field of electron beam curing, in particular to an electron beam radiation shielding device based on continuous production, which comprises a cuboid shielding box, a conveying mechanism arranged in the shielding box along the length direction of the shielding box, a shielding mechanism arranged in the shielding box, and an auxiliary locking mechanism arranged on the shielding mechanism, at least four panels are arranged on the shielding box at intervals, rectangular openings for workpieces to be radiated to penetrate through are formed in the panels, and the shielding mechanisms are arranged on the panels and can seal the openings; the shielding mechanism comprises a mounting frame, a shielding door slidably connected in the mounting frame, and a driving assembly arranged on the inner wall of the shielding box and used for driving the shielding door to be opened and closed. The driving assembly comprises an electric push rod fixedly arranged on the inner wall of the shielding box, a first linkage rod with the two ends hinged to a piston rod of the electric push rod and the shielding door respectively, and a second linkage rod with the two ends hinged to the shielding door and the installation frame respectively, and the effect of maintaining the stability and the transportation speed of the production line is achieved.

The invention provides a radiation preparation method and application of zwitter-ion hydrogel, and relates to the technical field of biomedical material preparation, SBMA and MPC monomers are weighed according to the mass ratio of 10: 1-10: 5, dissolved in deionized water and stirred and dissolved under nitrogen protection, a 1MeV electron accelerator is used for radiation, the dosage rate is 5 kGy / pass, the total absorbed dosage is 20 kGy, and a P (SBMA-co-MPC) zwitter-ion prepolymer is prepared; then mixing the prepolymer with PVA (polyvinyl alcohol) and PEGDA (polyethylene glycol diacrylate), heating to 90 DEG C to dissolve the PVA and the PEGDA, pouring into a mold, and carrying out freezing and thawing cycles of freezing at-40 DEG C for 12 hours and unfreezing at room temperature for 4 hours for three times to form a physical cross-linked network, wherein the concentration of the PVA is 2g / 10g water, and the concentration of the PEGDA is 0.2 g / 10g water; and finally, carrying out electron beam radiation crosslinking on the primarily formed hydrogel at a dosage rate of 5 kGy / pass and a total absorption dosage of 20 kGy to obtain the hydrogel with the three-dimensional porous structure. The method is mild in reaction condition and free of pollution, the hydrogel has high mechanical strength and anticoagulation and antibacterial functions, and a reliable material is provided for medical equipment application.

The invention belongs to the technical field of plastic recycling and reusing, and particularly relates to a recycling method of ultra-high molecular weight polyethylene waste. The recycling method of the ultra-high molecular weight polyethylene waste comprises the following steps: S1, pretreating the ultra-high molecular weight polyethylene waste to obtain pretreated polyethylene waste; s2, the pretreated polyethylene waste is subjected to electron beam radiation treatment, and radiation treated polyethylene waste is obtained; s3, mixing the radiation-treated polyethylene waste with a degradation aid, and performing solid-phase treatment to obtain a polyethylene waste crushed material; s4, mixing the polyethylene waste crushed material with an organic solvent, performing high-temperature dissolution treatment, adding an alcohol solvent to separate out polyethylene, performing solid-liquid separation to obtain solid and liquid, and drying the solid into powder to obtain recycled polyethylene powder; the recycling method not only can ensure effective recycling of wastes, but also can realize cyclic utilization of other raw materials.

The present invention relates to the technical field of chemical textile processing. Disclosed is a dyeing process for a polylactic acid / nanocellulose composite fiber, comprising a spinning solution preparation step, a spinning step and a dyeing step, wherein the spinning solution preparation step comprises uniformly mixing a nanocellulose suspension, a polylactic acid solution and an additive together, standing at 30-80°C for 1-2 h, performing high-energy electron beam radiation to form a gel, and washing the gel with water to obtain a hydrogel spinning solution; the spinning step comprises feeding the hydrogel spinning solution into a wet spinning device for spinning to form a fiber, and subjecting the fiber to high-energy electron beam radiation for drying and reinforcement to obtain a fiber filament, wherein the irradiation dose is 10-50 kGy, and the irradiation time is 3-5 minutes. The preparation method in the present invention is simple and easy to implement, and is environmentally friendly; the dye uptake rate of the prepared composite fiber reaches 80%, the strength of the composite fiber is enhanced by 1-2 times, and the anti-fibrillation property is improved by 1-2 times.

Stabilized precursor solutions can be used to form radiation inorganic coating materials. The precursor solutions generally comprise metal suboxide cations, peroxide-based ligands and polyatomic anions. Design of the precursor solutions can be performed to achieve a high level of stability of the precursor solutions. The resulting coating materials can be designed for patterning with a selected radiation, such as ultraviolet light, x-ray radiation or electron beam radiation. The radiation patterned coating material can have a high contrast with respect to material properties, such that development of a latent image can be successful to form lines with very low line-width roughness and adjacent structures with a very small pitch.

This disclosure provides a method for preparing an analyte monitoring system. The analyte monitoring system includes an on-body unit, an application device, and a cap. The on-body unit includes a housing having a receiving space, electronic components located within the receiving space, and a sensor operatively coupled to the electronic components. The housing has a first shell and a second shell that cooperate with each other. The application device is configured to apply the on-body unit to a host. The cap has a chamber that at least partially receives the sensor and is detachably coupled to the application device. The method includes: assembling the sensor into the first shell; sealing the cap to the first shell to form a sterilization module; subjecting the sterilization module to electron beam irradiation; assembling the electronic components and the second shell into the first shell to form a pre-assembled module; and coupling the cap to the application device to couple the pre-assembled module to the application device. This provides a simple method for preparing an analyte monitoring system.

The invention discloses a multi-layer co-extrusion polyethylene composite film and a preparation method thereof. The composite film comprises a protective layer, a barrier layer and an antibacterial layer which are sequentially laminated and compounded, wherein the antibacterial layer is prepared from the following raw materials in parts by mass: 90 to 100 parts of linear low density polyethylene and 0.2 to 10 parts of modified zinc oxide; the barrier layer is prepared from the following components in parts by mass: 85 to 95 parts of medium density polyethylene, 0.5 to 5 parts of modified aluminum oxide and 5 to 10 parts of compatilizer; the protective layer is prepared from the following raw materials in parts by mass: 90 to 100 parts of high-density polyethylene, 0.1 to 0.5 part of heat stabilizer and 0.1 to 1 part of cross-linking agent. According to the invention, polyethylene is taken as a single matrix, a three-layer co-extrusion cast film technology is utilized, and sectional gradual cooling and low-energy electron beam radiation crosslinking modification are matched, so that the composite film with a three-layer structure of a protection layer, a barrier layer and an antibacterial layer is prepared, and the composite film has excellent barrier property, antibacterial property and mechanical property.

Methods for forming melt processable, actinic radiation polymerizable and crosslinkable adhesives are described. In certain versions, the adhesives or pre-adhesive compositions include two initiators and are polymerized and / or crosslinked by exposure to actinic radiation such as UV light or electron beam radiation. Also described are pre-adhesive compositions including polymerizable monomers, articles including the adhesives, and various methods and systems related to the adhesives and their application. In addition, various apparatuses are described for polymerizing or crosslinking the compositions.

The application belongs to the technical field of anion exchange membranes, and discloses a method for preparing a quinine type anion exchange membrane through pre-irradiation grafting. Linear carbon chain polymer is used as a base material, and a vinyl monomer is used as a grafting monomer. The linear carbon chain polymer is pre-irradiated by an electron beam radiation source, then the pre-irradiated base material is subjected to a grafting reaction in a vinyl monomer solution, and then the obtained grafted polymer is subjected to a quaternary ammonium reaction with a quinine ring solution, so as to obtain a quinine type anion exchange membrane. The overall process is relatively simple, the reaction conditions are mild, the reaction time is relatively short, and the cost is relatively low. The prepared quinine type anion exchange membrane has higher anion conductivity and better mechanical strength compared with a biphenyl quinine anion exchange membrane. The prepared quinine type anion exchange membrane has stronger chemical stability compared with a piperidine type and a trimethylamine type anion exchange membrane, so that it can be applied to the fields of fuel cells, water electrolysis, and flow batteries.

This invention provides a method for preparing a magnetic hydrothermal biochar-based heavy metal adsorbent material, belonging to the field of environmental functional materials technology. It selects inexpensive, renewable, and easily modifiable natural biomass as raw material, and obtains a magnetic porous carbon framework through one-step hydrothermal carbonization. Then, epoxy groups are introduced using green electron beam radiation grafting technology. Finally, high-density amino functional groups are grafted onto the surface of the magnetic hydrothermal biochar through a dual-amino synergistic ring-opening reaction involving small-molecule polyamines with any one of ethylenediamine (EDA), triethylenetetramine (TETA), polyethyleneimine (PEI), and diethylenetriamine (DETA). The prepared adsorbent material possesses high adsorption capacity, rapid adsorption kinetics, and convenient magnetic separation and recovery performance, effectively solving the bottleneck problems of insufficient adsorption performance and difficulty in recovery of existing biomass adsorbents.

This invention discloses a hydrogel-based ultra-stretchable flexible multifunctional input device, its preparation, and its application. Based on a dual-crosslinking synthesis strategy involving hydrophilic polymer chains through hydrophobic crosslinking nodes and liquid metal electrostatic crosslinking nodes, this invention synthesizes conductive hydrogels using gamma-ray or electron beam radiation-induced polymerization and crosslinking methods, and successfully applies them to flexible multifunctional input devices. This device exhibits ultra-high tensile strength and self-healing properties, capable of withstanding significant cyclic stretching, achieving self-healing after repeated damage, and maintaining normal operation under certain stretching amplitudes and after self-healing. The device can function as both a touchscreen and a sensor, and can switch between these functions, offering advantages such as versatility, high sensitivity, and durability, and has broad application prospects in stretchable flexible electronic devices.

Binder compositions for ceramics are described that include little or no organic solvents. The binder compositions exhibit excellent ceramic adhesion characteristics upon cure, while also exhibiting lower adhesion characteristics to other types of materials, e.g., polymeric backing materials. The binder compositions are based upon acrylate functionality, and include at least one acrylate functional monomer or oligomer.

The invention belongs to the technical field of sodium-ion battery materials, and discloses a high-wettability dendrite-resistant sodium-ion battery composite diaphragm and a preparation method thereof. According to the invention, an electron beam radiation grafting modified hydrophilic polyolefin microporous membrane is used as a matrix, the surface of the hydrophilic polyolefin microporous membrane is coated with a modified nano cellulose fiber coating, and the stable composite diaphragm is formed through drying and hot press molding. The core problem of poor adhesion of the nano cellulose coating on the hydrophobic base membrane is solved through hydrophilic modification, synergistic improvement of super infiltration of the electrolyte, efficient ion conduction and dendritic crystal inhibition is realized, the preparation process is green and efficient, and the preparation method is suitable for the high safety requirement of the sodium ion battery.

The application discloses a preparation method of electron beam grafting antibacterial cotton fabric, which comprises the following steps: putting the fabric into an antibacterial working solution, taking out and rolling after immersion, sealing and electron beam irradiation grafting, etc. The antibacterial agent containing unsaturated double bond groups is used to finish the fabric, and electron beam radiation is used to promote the grafting polymerization. The high-energy electron beam generated by the electron accelerator can ionize, excite and generate free radicals, cause intermolecular crosslinking and degradation. The antibacterial agent containing unsaturated double bond groups has strong double bond activity, and the electron beam can easily initiate the chemical reaction between the double bond and the hydroxyl group of cellulose, so that the fabric has antibacterial effect. The prepared antibacterial fabric has excellent antibacterial performance. By adjusting the amount of antibacterial agent, the pick-up rate during padding, the irradiation dose of electron beam and other parameters, 100% of staphylococcus aureus and escherichia coli can be inactivated, and meanwhile, the lower radiation dose will not affect the color, strength, whiteness and other performances of the fabric.

This invention belongs to the field of sodium-ion battery materials technology and discloses a highly wettable, dendrite-resistant composite separator for sodium-ion batteries and its preparation method. The invention uses an electron beam radiation-grafted hydrophilic polyolefin microporous membrane as a substrate, coats its surface with a modified nanofiber coating, and then forms a stable composite separator through drying and hot pressing. This invention solves the core problem of poor adhesion of the nanofiber coating on a hydrophobic substrate through hydrophilic modification, achieving a synergistic improvement in electrolyte superwetting, high ion conduction efficiency, and dendrite suppression. Its preparation process is green and efficient, suitable for the high safety requirements of sodium-ion batteries.

The utility model relates to a caprolactam wastewater treatment process technology, in particular to a caprolactam wastewater treatment process system, which overcomes the problem that more macromolecular organic pollutants which are difficult to degrade still remain after the treatment of a traditional biochemical and MBR (Membrane Bioreactor) membrane process, and can meet the practical demand of wastewater resource utilization. The caprolactam wastewater treatment system comprises a biochemical pretreatment system for carrying out biochemical pretreatment on the caprolactam wastewater, a biochemical treatment system for carrying out biochemical treatment on the caprolactam wastewater and a deep treatment system for carrying out deep treatment on the caprolactam wastewater, the biochemical pretreatment system, the biochemical treatment system and the deep treatment system are sequentially communicated, and the deep treatment system comprises an electron beam irradiation device for performing electron beam radiation ionization on the caprolactam wastewater to degrade macromolecular organic matters and an active coke adsorption tower for adsorbing the caprolactam wastewater to reduce suspended matters and COD (Chemical Oxygen Demand).

The present invention relates to a curable composition comprising: a) at least one alkoxylated isosorbide di(meth)acrylate, b) at least one (meth)acrylate-functionalized oligomer, and c) at least one (meth)acrylate-functionalized monomer. The invention also relates to a process for the preparation of a cured product, especially a dental material, comprising curing this curable composition, preferably by exposing the curable composition to radiation such as UV, near-UV, visible, infrared, near-infrared and / or electron beam radiation.

The invention relates to a method for producing a nonwoven material suitable for removing harmful anions from aqueous solution by modifying its surface. The method according to the invention comprises the steps: a) providing a nonwoven material selected from the group consisting of polypropylene, polyethylene, viscose, polyamide, polylactide, polyester, polyethersulfone, polysulfone, and polyvinylidene fluoride; b) applying a coating solution to the nonwoven material, wherein the coating solution contains polyallylamine hydrochloride (PAH) and / or polyhexamethylene biguanide (PHMB) as a modifying reagent; c) treating the nonwoven material and the coating solution with electron beam radiation; and d) purifying the modified nonwoven material.