67 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 invention discloses a bio-based TPV composite material and a preparation method thereof, and belongs to the technical field of preparation of TPV composite materials, polylactic acid is used as a plastic phase, bio-based itaconate rubber and a bio-based ethylene-vinyl acetate copolymer are used as a rubber phase, maleic anhydride grafted cardanol and an ethylene-acrylic acid copolymer are used as a composite compatibilizer, and the bio-based TPV composite material is prepared. Titanate coupling agent modified core-shell particles are added to serve as a reinforcing agent, dicumyl peroxide is combined with an electron beam radiation initiation mode, and the bio-based PLA / Bio-ItBR / EVA TPV is prepared through a dynamic vulcanization process. The product has medium hardness, medium tensile strength, excellent ductility and high elasticity, and good elastic memory ability and compressive deformation resistance. The compatibility between a plastic phase and a rubber phase is improved, and the phase separation problem caused by polarity difference is reduced. The dicumyl peroxide is combined with a dynamic vulcanization process initiated by electron beam radiation, so that a uniform cross-linked network can be formed, and the stability of the material performance is improved.

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.

The invention discloses a polypropylene grafted copolymer self-reinforced polypropylene cable insulation material and a preparation method thereof, and relates to the field of high polymer materials. The preparation method of the material comprises the following steps: firstly, preparing a polypropylene grafted copolymer by a melt grafting method or an electron beam radiation grafting method; carrying out melt blending on the master batch and polypropylene to prepare a primary master batch; and finally, carrying out melt blending on the primary master batch, polypropylene, an antioxidant, a voltage stabilizer and a processing aid to obtain the cable insulating material. The polypropylene grafted copolymer induces the matrix polypropylene to generate a beta crystal form, and the beta crystal form and the polar vinyl monomer jointly realize self-enhancement independent of an elastomer, so that the toughness, the heat resistance and the direct-current dielectric property of the material are synchronously improved, and the problem of performance reduction caused by blending of traditional elastomers is solved; the method is suitable for the high-voltage direct-current cable insulation field.

The invention discloses an antibacterial PET cup material and a preparation method thereof, and belongs to the technical field of antibacterial plastic cup materials, the antibacterial PET cup material comprises the following raw materials by weight: 85.6-92.7 parts of maleic anhydride grafted and electron beam radiation co-modified PET, 6.3-12.3 parts of a thermal activation type carbon-based nano antibacterial agent, 1.5-2.3 parts of a dispersant, and 0.5-1.3 parts of an antioxidant; the maleic anhydride grafted and electron beam radiation co-modified PET is obtained by grafting and modifying PET with maleic anhydride and then performing electron beam radiation modification treatment; the preparation method of the thermal activation type carbon-based nano antibacterial agent comprises the following steps: synthesizing carbon dots from APTES and citric acid through a hydrothermal method, carrying out charge regulation on the carbon dots, compounding the carbon dots with chitosan, and carrying out thermal activation treatment to prepare the thermal activation type carbon-based nano antibacterial agent. The antibacterial PET material prepared by the invention has a good antibacterial effect and relatively durable and stable antibacterial performance, and meanwhile, is high in tensile strength, and is beneficial to improving the durability of a water cup.

The present disclosure relates to a membrane with significantly increased selectivity for use in hemodialysis applications, wherein the membrane is coated with chondroitin. The membrane can be obtained by contacting a base membrane, which for example comprises a blend of i) a polysulfone, polyethersulfone or polyarylethersulfone and ii) polyvinylpyrrolidone, to a solution of chondroitin followed by e-beam radiation. The disclosure further relates to a process for producing the selective hemodialysis membrane, and to a method of increasing the selectivity of a membrane. The disclosure further relates to a filtration / diffusion device comprising such membrane.

The invention provides a preparation method and application of MOFs (Metal-Organic Frameworks) functionalized magnetic hydrothermal sawdust carbon, and belongs to the technical field of environmental functional materials. The preparation method comprises the following steps: dissolving sawdust carbon by using ethylene glycol, so that FeCl3. 6H2O and CH3COONa in the sawdust carbon are subjected to hydrothermal carbonization at high temperature and high pressure to generate a hydrothermal carbon matrix and form a uniformly dispersed magnetic hydrothermal carbon composite material; grafting a functional carboxylic acid monomer on the surface of the magnetic hydrothermal sawdust carbon material by virtue of an electron beam radiation grafting technology; and adsorbing and fixing a metal center by using the magnetic hydrothermal sawdust carbon grafted with the functional carboxylic acid monomer, and growing ZIFs in situ by taking dimethylimidazole as a ligand to prepare the magnetic recoverable adsorption material ZIFs (at) MPS-HC with better antibiotic adsorption performance. As a composite material with relatively high adsorption efficiency and adsorption capacity, the composite material can be applied to the field of adsorption and recovery of antibiotic wastewater pollutants.

A process for coating a substrate with a coating having a gloss value at an angle of 60° of at most 40 gloss units, comprising applying a layer of liquid, solvent-free, radiation-curable coating composition at a dry film thickness and curing by electron-beam radiation, the coating composition comprising a radiation-curable resin system, a first matting agent, and optionally a second matting agent in a weight ratio of first to second matting agent of at least 1.0 and a combined amount of first and second matting agents of 8-25 wt.%, based on the weight of the radiation-curable resin system, wherein the first matting agent consists of spherical particles of non-reactive polymer with an average particle size Dv50 of 1.15-1.90 times the dry film thickness, wherein the second matting agent consists of particles with an average particle size Dv50 smaller than the dry film thickness.

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.

The invention relates to the technical field of chemical textile processing, and discloses a polylactic acid / nanocellulose composite fiber dyeing process, which comprises a spinning solution preparation process, a spinning process and a dyeing process, and the spinning solution preparation process comprises the following steps: uniformly mixing a nanocellulose suspension, a polylactic acid solution and an additive, standing at 30-80 DEG C for 1-2 hours, performing high-energy electron beam radiation to form gel, and washing the gel to obtain a hydrogel spinning solution; in the spinning process, the hydrogel spinning solution is fed into wet spinning equipment for spinning to form fibers, the fibers are subjected to high-energy electron beam radiation drying reinforcement to obtain fiber filaments, the irradiation dose is 10-50 kGy, and the irradiation time is 3-5 minutes. The preparation method disclosed by the invention is simple, feasible, green and environment-friendly, the dye uptake of the prepared composite fiber reaches 80%, the strength of the composite fiber is enhanced by 1-2 times, and the fibrillation resistance is improved by 1-2 times.

The invention discloses a low-carbon alkane dehydrogenation catalyst as well as a preparation method and application thereof, and belongs to the technical field of low-carbon alkane dehydrogenation catalysis. ZMQ-1 molecular sieve dispersion liquid is prepared from a ZMQ-1 molecular sieve and an EDTA (Ethylene Diamine Tetraacetic Acid) solution; carrying out electron beam radiation treatment on the ZMQ-1 molecular sieve dispersion liquid; adding a lanthanum compound and a rhodium compound to obtain a mixed solution; and carrying out electron beam radiation treatment on the mixed solution, and carrying out ball dropping forming, drying and roasting to obtain the low-carbon alkane dehydrogenation catalyst. Through the mode, the light alkane dehydrogenation catalyst is obtained by performing electron beam radiation treatment on the ZMQ-1 molecular sieve dispersion liquid, adding lanthanum and rhodium elements according to a reasonable proportion, performing electron beam radiation treatment on the mixed liquid, and performing ball dropping forming, drying and roasting. On the other hand, the whole preparation process is less than 10 hours, the production cycle of the catalyst is shortened, and the energy consumption of the preparation process is reduced.

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 monitoring device monitors an electron beam in an electron beam irradiation system having an electron beam irradiation device configured to irradiate an irradiation target object with the electron beam via an emission window. The electron beam monitoring device includes a first X-ray detection unit and a second X-ray detection unit. The first X-ray detection unit has a detection surface directed toward between the emission window and the irradiation target object and detects an X-ray. The second X-ray detection unit is arranged to face the emission window and detects a one-dimensional or two-dimensional distribution of the X-ray.

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 belongs to the field of high polymer materials, and particularly relates to a battery pack buffering fireproof material and a preparation method thereof. The fireproof material is prepared from the following components in parts by mass: 50 to 70 parts of EVA (Ethylene-Vinyl Acetate), 10 to 20 parts of EPDM (Ethylene-Propylene-Diene Monomer), 5 to 15 parts of SBS (Styrene Butadiene Styrene), 15 to 25 parts of intumescent flame retardant, 2.5 to 5 parts of silane modified boehmite, 1.5 to 2.5 parts of smoke suppressant, 3 to 8 parts of compatilizer, 0.8 to 1.2 parts of cross-linking agent, 4 to 6 parts of foaming agent, 0.5 to 1 part of activating agent and 0.5 to 1 part of nucleating agent. Silane modified boehmite is decomposed at high temperature and reacts with polyphosphoric acid decomposed by APP to generate a ceramic layer, the carbon yield can be increased, EVA main chain crosslinking can be completed at normal temperature through electron beam radiation, and after a pre-crosslinking framework is formed, a crosslinking agent is crosslinked with an EPDM / SBS chain segment, and a rubber phase elastic network can be reinforced.

The invention provides a production process of nylon washing cloth, which comprises the following specific steps: (1) pre-shrinking a gray fabric, soaking the gray fabric in a pretreatment solution, and carrying out microwave treatment to obtain a treated gray fabric; the pretreatment liquid is prepared from the following raw materials in parts by weight: 5 to 7 parts of organic silicon modified polyurethane, 3 to 5 parts of citric acid, 1 to 3 parts of isocyanate ethyl acrylate and 50 to 70 parts of water; (2) performing electron beam radiation irradiation, water washing and pre-shaping treatment on the treated gray fabric to obtain pre-shaped gray fabric; and (3) wetting the pre-shaped gray cloth, adding a dye and a dye auxiliary agent, setting a program, carrying out overflow dyeing, dehydrating and spreading the cloth, and carrying out shaping treatment, cloth connection, gluing and finished product packaging. The obtained nylon water washing cloth is hydrophilic, soft, washable, high in color fastness and good in application prospect.

The present invention discloses a bio-based TPV composite material and a preparation method thereof, belonging to the technical field of TPV composite material preparation. The invention uses polylactic acid as the plastic phase, bio-based itaconate rubber and bio-based ethylene-vinyl acetate copolymer as the rubber phase, maleic anhydride grafted cardanol and ethylene-acrylic acid copolymer as a composite compatibilizer, and titanate coupling agent-modified core-shell particles as a reinforcing agent. The bio-based PLA / Bio-ItBR / EVA TPV is prepared by a dynamic vulcanization process using dicumyl peroxide combined with electron beam radiation initiation. The product has medium hardness, medium to high tensile strength, excellent ductility and high elasticity, good elastic memory and resistance to compression deformation. The present invention improves the compatibility between the plastic phase and the rubber phase, reducing the phase separation problem caused by polarity differences. The dynamic vulcanization process using dicumyl peroxide combined with electron beam radiation initiation can form a uniform cross-linked network and improve the stability of material properties.

The application belongs to the field of electrical performance detection, and particularly discloses a kind of in-situ measurement method and system for electrical performance defects of memory device, which comprises: modulated electron beam radiation is radiated on the target position of the surface of the device to be measured, the number of electrons radiated to the target position is in sinusoidal function relationship with time, the SEs signal of the target position is collected, the actual potential signal of the target position is collected, the proportional coefficient between the SEs signal and the actual potential signal is determined, the target position of the device to be measured is equivalent to a circuit in which resistance and capacitance are connected in parallel, and the resistance R and capacitance C of the target position are calculated according to the proportional coefficient SEs signal and the current signal of the modulated electron beam; according to the abnormal values in the resistance R and capacitance C of multiple target positions, the position of the electrical performance defects of the device is determined. The application can improve the defect contrast, better extract defect information, and meet the in-situ measurement of electrical performance of memory device.

The invention relates to the field of biological medicine, in particular to a preparation method and application of alpha-tocopheryl acetate-sodium hyaluronate nanoparticles. The preparation method comprises the following steps: firstly, shearing and emulsifying an alpha-tocopheryl acetate acetone solution and a sodium hyaluronate solution to obtain a uniformly dispersed solution, and then breaking part of chemical bonds on a sodium hyaluronate sugar chain and generating a large number of macromolecular free radicals under the premise of avoiding excessive degradation of sodium hyaluronate under the radiation action of a low-dose electron beam. The sodium hyaluronate free radicals have high reaction activity and form covalent bonds with tocopheryl acetate molecules. According to the invention, tocopheryl acetate is selected as a grafting modification material of sodium hyaluronate, and meanwhile, active ingredients such as beta-sitosterol and the like are wrapped, so that the tocopheryl acetate can be used as a main ingredient in the scalp filler, and a new idea is provided for treating androgenetic alopecia.

The present invention discloses a high-toughness non-woven fabric for homogeneous bags and a preparation method thereof, relating to the field of new materials technology. The high-toughness non-woven fabric for homogeneous bags produced in the present invention is produced by post-finishing a hydrophilic polyethylene non-woven fabric with a finishing agent. The hydrophilic polyethylene non-woven fabric is produced by first grafting glycidyl methacrylate onto the surface of the polyethylene non-woven fabric by electron beam radiation and then reacting with hydrophilic polylactic acid, thereby enhancing the hydrophilicity of the polyethylene non-woven fabric. The modified polyether ester is produced by reacting a modified phenolic resin with 2,5-furandicarboxylic acid and then with tributyl citrate. The modified phenolic resin is produced by reacting a phenolic resin with o-toluidine, thereby enhancing the toughness of the non-woven fabric.

The invention discloses a preparation method of an electron beam radiation cured optical function polyurethane resin type conformal coating. The preparation method specifically comprises the following steps: step 1, synthesizing a 2-hydroxy-4-methoxybenzophenone functional monomer; step 2, synthesizing a Cr2B2MBene functional monomer; step 3, synthesizing polyurethane resin; and 4, preparing the polyurethane resin type conformal coating according to products obtained in the steps 1-3. The invention further discloses the light function polyurethane resin type conformal coating cured through electron beam radiation and a curing method of the light function polyurethane resin type conformal coating cured through electron beam radiation, and the prepared conformal coating can achieve efficient shielding of ultraviolet rays and efficient transmittance of visible light.

The invention relates to radiation-treated reinforcement fibers, reinforced asphalt and portland cement concrete, and grout, methods for producing the same and application for their use. The radiation treatment includes exposing reinforcement fibers to electromagnetic energy, e.g., gamma rays, and / or electron-beam (E-beam) radiation. As a result of the treatment, the radiation-treated reinforcement fibers have a modified or deformed surface, e.g., an abraded and / or porous surface, as compared to reinforcement fibers without a radiation treatment.

The invention provides a method for preparing chitosan from ganoderma lucidum spore wall waste residues and application, and belongs to the technical field of waste resource utilization. The method comprises the following steps: 1) crushing the ganoderma lucidum spore wall waste residues, performing electron beam radiation treatment, mixing the ganoderma lucidum spore wall waste residues with water, sequentially adding cellulase and papain under an ultrasonic condition to perform a step-by-step hydrolysis reaction, centrifuging after the reaction is finished, and collecting a precipitate; 2) mixing the precipitate obtained in the step 1) with a sodium hydroxide solution, adding a surfactant, and treating in an ultrasonic-microwave reactor; and adjusting the pH value to be neutral, centrifuging, and collecting the precipitate to obtain the chitosan. According to the method, low-dose electron beam radiation treatment is adopted, and cellulase and papain are subjected to step-by-step hydrolysis, so that the yield and the deacetylation degree of the chitosan can be improved, and the biocompatibility of the chitosan is improved. When the obtained chitosan is used in the barrier film, the light transmittance can be reduced.

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.

A method of waste treatment includes treating partially-dewatered matrix with a first electron-beam radiation dose. The treated partially-dewatered matrix is transferred to a digester where the treated partially-dewatered matrix is subjected to anaerobic digestion. Biogas is recovered from the treated partially-dewatered matrix during the anaerobic digestion. The treated partially-dewatered matrix is dried and subjected to a second electron-beam radiation dose.