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87 results about "Nuclear track" patented technology
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Dialysis membrane based on cross-linked lysozyme and application of dialysis membrane
ActiveCN108854599AGood biocompatibilityHigh retention rateSemi-permeable membranesMembranesDialysis membranesCross-link
The invention discloses a dialysis membrane based on the cross-linked lysozyme and application of the dialysis membrane. The dialysis membrane is a two-dimensional nano film formed by the phase transformation of the lysozyme which is adhered to a PET nuclear track membrane after being cross-linked by using glutaraldehyde, and the dialysis membrane adopting the cross-linked lysozyme nano film as acompact wrapper layer and the PET nuclear track membrane as a dialysis membrane of a supporting layer. The dialysis membrane is easy to prepare in a large scale, also has the characteristics of low cost, low energy consumption, environmental protection and the like at the same time, avoids the complicated step and environmental pollution problem in the traditional polymer film synthetic process, is better in biological compatibility, capable of selectively separating different molecules, capable of completely intercepting the molecules with the size of 3.2nm or more, is higher in diffusion rate for the small molecules, and capable of being used as a blood purifying film to remove urea, creatinine and medium-large-molecular toxins and indoxyl-sulfate, and is a relatively ideal dialysis membrane material.
Owner:SHAANXI NORMAL UNIV
Composite nuclear track membrane and preparation method thereof
ActiveCN104001429AImprove surface hydrophilicityHigh mechanical strengthSemi-permeable membranesPolyesterVolumetric Mass Density
The invention discloses a composite nuclear track membrane and a preparation method thereof. The composite nuclear track membrane comprises a polyester nuclear track membrane or a polycarbonate nuclear track membrane, wherein a porous cellulose acetate membrane is composited on one surface of the polyester nuclear track membrane or the polycarbonate nuclear track membrane so as to form the composite nuclear track membrane of which the thickness is 67-160 microns, the aperture of the polyester nuclear track membrane or the polycarbonate nuclear track membrane is 1-10 microns, the pore density of the polyester nuclear track membrane or the polycarbonate nuclear track membrane is 2*10<5> / cm<2>-2*10<7> / cm<2>, and the thickness of the polyester nuclear track membrane or the polycarbonate nuclear track membrane is 7-25 microns. The composite nuclear track membrane has the advantage that the surface hydrophilicity is good, the mechanical strength is high, the membrane thickness is moderate, the automatic operation can be realized easily, the flux of the filtering liquid is high, and the assimilative capacity is strong; the composite membrane is an integer, is not layered and is suitable for fabricating roll type filter cores; the porous cellulose acetate membrane composited on the nuclear track membrane is taken as a pre-filtering layer or a support layer of the nuclear track membrane, so that the problems about mechanical strength and thickness of the membrane are solved, and meanwhile, the a pre-filtering problem of the membrane is solved.
Owner:天津理源科技有限公司
Novel nuclear pore membrane
InactiveCN101380547AIncreased etch sensitivityReduce taperSemi-permeable membranesMass numberMembrane surface
The invention relates to a novel nuclear pore membrane (or nuclear track membrane), generally the nuclear track always has conicity after etching, the millipore of the nuclear pore membrane is single-cone or double-cone, the center aperture of the millipore of the double cone is less than the aperture on both surfaces of the membrane. Particles are blocked in the millipore easily when filtering, and the membrane is blocked easily. Meanwhile, the ions with lower mass number are utilized for irradiating the electrolyte membranes, for the nuclear track etching sensitivity is lower, conicity is larger, the nuclear pore membrane with small aperture is made hard. The center aperture of the millipore of the nuclear pore membrane made by the invention is larger than the diameters of both surfaces of the membrane or is of column form capillary tube shape. The shape of the millipore causes the particles larger than the membrane surface aperture to be trapped on the membrane surface, and the nuclear pore membrane is not blocked easily. Meanwhile, a new method is provided for making nuclear pore membranes by utilizing the ions with lower mass number.
Owner:毕明光
Nuclear pore filter membrane for precision medicine liquid filter and preparation method thereof
ActiveCN101104136AUniform pore sizeAccurate separationSemi-permeable membranesFiltering accessoriesHigh energyFiltration
The invention relates to the medical clinic transfusion field, more particularly, relating to the nuclear track microporous membrane used on a precision medical solution filter and the preparation method. The substrate membrane of the nuclear track microporous membrane used on the precision medical solution filter selects the polycarbonate as the material, and the nuclear track microporous membrane is obtained by high energy charged particle radiation and then sensitized and etching treatment to the substrate membrane, the apertures of the nuclear track microporous membrane are between zero point two micron and ten microns, the density of the nucleopores is that the membrane has five multiply one hundred and five to seven multiply one hundred and five pores per square centimeter. The preparation method of the nuclear track microporous membrane of the invention includes steps of radiation, sensitized treatment, etching and rinsing. The arrangement and application of the precision filter made by the nuclear track microporous membrane of the invention on the terminal of the infusion set of the disposable precision filtering infusion set can effectively filter the insoluble particles in the medical solution, and the filtration rate is more than or equal to ninety five percent, and hold the last pass of the medical solution form entering the human body, thus truly blocking the invasion of the insoluble particles to patients.
Owner:ZHEJIANG FERT MEDICAL DEVICE
Clonidine paster for treating children's hyperkinetic symptom, twitch symptom and its preparation method
InactiveCN101011391AImprove bioavailabilityAvoid peaks and valleys in blood concentrationOrganic active ingredientsNervous disorderDrug contentControl layer
The invention relates to a cola stable paster which can treat hyperkinetic symptom of children, which comprises back liner, drug layer, release-control layer, paste layer, and anti-paste layer. The invention is characterized in that the back liner is aluminized film; the drug layer is cola stable drug and polyacrylacid ester pressure-sensitive gel; the release-control layer is modified EVA film or nuclear track porous film; the paste layer is cola stable drug and polyacrylacid ester pressure-sensitive gel; the cola stable drug content of drug layer is higher than the cola stable drug content of paste layer. The invention can avoid oral taking, with high biological utilization, stable effect, continuous release, and high safety. The invention also provides relative production.
Owner:北京克莱斯瑞控释药业有限公司
Method and apparatus for radiation dosimetry utilizing fluorescent imaging with precision correction
A method comprising the following steps: (a) adjusting a radiation dose measurement for a fluorescent nuclear track detector based on a plurality of fluorescence contrast images for the fluorescent nuclear track detector to thereby produce a calibrated radiation dose measurement, and (b) displaying the calibrated radiation dose measurement to a user and / or saving the calibrated radiation dose measurement to a storage medium, wherein the fluorescent nuclear track detector comprises a luminescent material, wherein the radiation dose measurement is based on one or more fluorescent light measurements produced by fluorescent imaging of the fluorescent nuclear track detector using excitation light from a laser having a first wavelength, and wherein the plurality of fluorescence contrast images are produced by illuminating the fluorescent nuclear track detector with excitation light having a second wavelength.
Owner:LANDAUER INC
Method and apparatus for radiation dosimetry utilizing fluorescent imaging with precision correction
A method comprising the following steps: (a) adjusting a radiation dose measurement for a fluorescent nuclear track detector based on a plurality of fluorescence contrast images for the fluorescent nuclear track detector to thereby produce a calibrated radiation dose measurement, and (b) displaying the calibrated radiation dose measurement to a user and / or saving the calibrated radiation dose measurement to a storage medium, wherein the fluorescent nuclear track detector comprises a luminescent material, wherein the radiation dose measurement is based on one or more fluorescent light measurements produced by fluorescent imaging of the fluorescent nuclear track detector using excitation light from a laser having a first wavelength, and wherein the plurality of fluorescence contrast images are produced by illuminating the fluorescent nuclear track detector with excitation light having a second wavelength.
Owner:LANDAUER INC
Method for observing track topography of solid nuclear track detector by means of optical microscope
ActiveCN107144871AAvoid the hassle of going out to seek cooperationSave time at workRadiation particle trackingParticle beamIrradiation
The invention discloses a method for observing track topology of a solid nuclear track detector by means of an optical microscope. The method comprises the following steps of preparing the solid nuclear track detector which is a square detector, rubbing and polishing four sides of the square detector, and identifying an observing side; performing vertical irradiation on the square detector by means of particle beam flow for forming the detector after irradiation, wherein the irradiation area of the particle beam flow is larger than the area of the square detector; etching the irradiated detector, thereby forming the etched detector, then taking the etched detector out, and obtaining a to-be-observed detector through post-treatment; wherein no contact between the observing side and a hard object is ensured in a taking-out process; and placing the to-be-observed detector on an observing platform of the optical microscope, and making the observing side face an objective lens of the optical microscope, thereby observing the track topography. The method realizes a purpose of observing the track topography by means of the optical microscope.
Owner:THE BEIJING PREVENTION & TREATMENT HOSPITAL OF OCCUPATIONAL DISEASE FOR CHEM IND
Device and method for measuring concentration of <222>Rn and <220>Rn synchronously by adopting electrostatic collection and solid nuclear track
ActiveCN103983999ASimple and reliable measurement processThe calculation method is simple and reliableRadiation intensity measurementMeasurement deviceEtching
Owner:HENGYANG NORMAL UNIV
Method for measuring geologic age on basis of thermoanalysis
InactiveCN104749346AEarth material testingSpecial data processing applicationsReference sampleIsotope
The invention discloses a method for measuring a geologic age on the basis of a thermoanalysis. The method comprises the following steps: selecting a reference sample, measuring the average values of <238>U, <232>Th and <147>Sm isotopic contents of the reference sample, calculating the values of N238, N235, N232 and N147<S>, calculating the standard N4<He> of the reference sample, making the isothermal DSC curve of the reference sample by a differential scanning calorimeter, measuring the annealing quality in a unit mass, calculating the annealing heat released by an average of alpha-ion nuclear tracks of the reference sample, then measuring the contents of uranium, thorium and samarium in a sample to be measured, calculating N235, N232 and N147<S>, making the isothermal DSC curve of the sample to be measured by using the differential scanning calorimeter, measuring the annealing heat, calculating the number of the nuclear tracks of the sample to be measured in the unit mass, and finally calculating the geologic age t of the sample to be measured, wherein the geologic environments experienced by the sample to be measured and the reference sample are similar. According to the method disclosed by the invention, a helium measurement is replaced by a heat measurement, and the method is simple and practical.
Owner:XIJING UNIV
Adherence separation algorithm of intensive solid state nuclear tracks
InactiveCN103065283AAvoid removalSolve accurate separation problemsImage enhancementImage analysisSolid massGranularity
The invention discloses an adherence separation algorithm of intensive solid state nuclear tracks. The adherence separation algorithm of the intensive solid state nuclear tracks includes the following steps: (1) image contrast enhancing; (2) expanding maximum value separation; (3) area proportion adherence separation; and (4) special adherence separation. The adherence separation algorithm of the intensive solid state nuclear tracks can effectively solve the problems of removing of noise and non-track impurities in track images, processing of the tracks which are large in granularity difference, accurate separation of the tracks which are serious in adherence and uneven in inner gray scale, and meanwhile promote the speed of adherence separation.
Owner:SOUTHWEAT UNIV OF SCI & TECH
Porous gold nanowire and manufacturing method and application thereof
ActiveCN104942281AUniform fluorescence enhancementAvoid the problem of significant fluorescence enhancementMaterial nanotechnologyLuminescent compositionsNanowireMicrometer
The invention discloses a porous gold nanowire and a manufacturing method and the application of the porous gold nanowire. The length of the porous gold nanowire is 10 micrometers-100 micrometers, the diameter of the porous gold nanowire is 20 micrometers-500 micrometers, pore-shaped structures of which the pore diameter is 5 micrometers-100 micrometers are evenly distributed in the porous gold nanowire, and the pore diameter is smaller than the diameter. According to the manufacturing method, with a PC nuclear track film being a template, an electrochemical deposition method is utilized for manufacturing a gold-silver alloy nanowire, the gold-silver alloy nanowire is separated from the template, and a dispersed nanowire is obtained; nitric acid is utilized for removing silver elements in alloy, so that the porous gold nanowire is formed. Compared with a non-porous gold nanowire, the porous gold nanowire has a more remarkable fluorescence-enhancement effect and enhances the fluorescence by 72 times to the maximum degree, and the non-porous gold nanowire enhances the fluorescence by 2.9 times only. According to the manufacturing method, the one-dimensional nanowire having the remarkable and even fluorescence enhancement effect is obtained for the first time. The gold nanowire of a segmented structure is further manufactured, and the porous part of the gold nanowire has remarkable fluorescence intensity.
Owner:TSINGHUA UNIV
Method and apparatus for preparing silver black nanoparticles through nuclear track porous surface
InactiveCN103088297AEfficient use ofMaterial nanotechnologyVacuum evaporation coatingPolyesterMaterials preparation
The invention relates to a silver black nanometer material preparation technology, specifically to a method and an apparatus for preparing silver black nanoparticles through a nuclear track porous surface. According to the method, 32S ions are adopted to irradiate a polyester or a CR-39 sample; a NaOH solution etching process is performed to obtain a nuclear track polyester sample or a nuclear track CR-39 sample; the nuclear track polyester sample or the nuclear track CR-39 sample, and a detector sheet are adhered to a sample holder inside a vacuum chamber, and a pressure in the vacuum chamber reaches 3*10<-3>-4*10<-3> Pa; argon is introduced into the vacuum chamber, such that an argon pressure in the vacuum chamber reaches 50-100 Pa; and silver wire in the vacuum chamber is heated so as to melt and evaporate the sliver, and a layer of metal sliver nanoparticles are plated on the surface of the nuclear track polyester sample or the nuclear track CR-39 sample. According to the present invention, a new idea and method is provided for infrared temperature sensitive sensor absorption material silver black preparation, and an enlightenment effect is provided for efficient infrared detector utilization.
Owner:CHINA INSTITUTE OF ATOMIC ENERGY
Heavy ion production device for industrial production of nuclear track membrane
ActiveCN111292866AReduce volumeReduce weightAcceleratorsIrradiation devicesParticle acceleratorNuclear engineering
The invention relates to a heavy ion production device for industrial production of nuclear track membrane. The heavy ion production device comprises an ion source, an LEBT beam line, a particle accelerator, an HEBT beam line and a membrane irradiation terminal; the ion source is used for generating a heavy ion beam in a high charge state and carrying out primary acceleration on the heavy ion beam; the LEBT beam line is used for analyzing the heavy ion beam and transmitting the heavy ion beam to the particle accelerator in a matching manner; the particle accelerator performs main accelerationon the heavy ion beam and then injects the heavy ion beam into the HEBT beam line; the HEBT beam line splits the injected heavy ion beam into a plurality of heavy ion beams and then transmits the heavy ion beams to a plurality of membrane irradiation terminals, and the membrane irradiation terminals lead out the heavy ion beams and irradiate a thin membrane placed in the atmospheric environment. Due to the fact that the thin membrane can be placed in the atmospheric environment to be irradiated, the thin membrane is convenient and rapid to replace, the thin membrane replacing time is greatly shortened, multiple terminals can irradiate the thin membrane at the same time, the irradiation efficiency of the thin membrane is greatly improved, and thus the production efficiency of the nuclear track membrane is improved.
Owner:INST OF MODERN PHYSICS CHINESE ACADEMY OF SCI
Method for measuring alpha decay detection efficiency of 222Rn and 220Rn daughters
InactiveCN104267422AFast acquisition of decay detection efficiencyEasy to measureX/gamma/cosmic radiation measurmentNuclear engineeringAlpha decay
The invention discloses a method for measuring the alpha decay detection efficiency of 222Rn and 220Rn daughters. According to the method, after barrier films with different thicknesses are added to the surfaces of three solid-state nuclear track detectors respectively, the alpha decay detection efficiency of different daughters of 222Rn and 220Rn is measured; for the 222Rn daughters, the solid-state nuclear track detectors mainly measure alpha particles generating energy during decay of 218Po and 214Po is 6 MeV and 7.69 MeV; for the 220Rn daughters, the solid-state nuclear track detectors mainly measure alpha particles generating energy during decay of 212Bi and 212Po is 6.05 MeV and 8.78 MeV. By means of the method, the alpha decay detection efficiency of different daughters of 222Rn and 220Rn is measured, the whole measuring process and the calculation method are simple, and the alpha decay detection efficiency of the daughters of 222Rn and 220Rn can be obtained quickly.
Owner:HENGYANG NORMAL UNIV
Making process and product of comprehensive antifake nuclear-track porous fluorescent mark
InactiveCN1332369AStrong anti-counterfeiting functionImprove visual effectsStampsFluorescence/phosphorescenceRainbowFluorescence
The invention includes following steps: transparent high molecular polymer film is irradiated by use of heavy ion with certain energy and mass. Laser rainbow mold pressing image hologram is fabricated on the film irradiated. Mark, pattern and character of nuclear micropore with protection against false are printed on the film irradiated. A layer of fluorescence protecting coat is compounded or coated. The said film is processed by etching to form pore, cleaning, drying procedure with chemical etchant. The invention gathers multi protection against false, aesthetic property and practicability in one product, in order to meet higher and higher demand on the technique of protection against false in merchandise market.
Owner:TSINGHUA UNIV
Method for preparing nano zinc oxide wires
ActiveCN102220596AMeet the requirements of industrial useMaterial nanotechnologyElectrolysis componentsElectrolysisElectrochemistry
The invention discloses a method for preparing nano zinc oxide wires by using solid nuclear track technology. In the method, through nuclear pore film with a pore diameter of 100 to 600 nanometer is used as a template, a 110-to-200-nanometer-thick gold layer is plated on one side of the nuclear pore film, and a 10-to-40-micrometer-thick copper layer is deposited on the gold layer electrochemically; then a platinum wire is used as an anode and a gold, copper substrate is used as a cathode, zinc oxide is electrochemically deposited to form zinc oxide nanowires, wherein electrolyte is mixed solution of 0.05 to 0.2mol / L KCl, 2 to 7mmol / L ZnCl2 and 3 to 8 mmol / L H2O2, the pH value is 6.5 to 7.5, the electrolysis voltage is 0.8 to 1.5V, and the electrochemical deposition time is 1 to 5 hours. The diameter of the produced zinc oxide nanowires is 100 to 600 nanometers, and the length is 5 to 8 micrometers.
Owner:CHINA INSTITUTE OF ATOMIC ENERGY
Making method of nuclear track etching membrane
InactiveCN105169963ASimple processEasy to implementSemi-permeable membranesPolymer scienceMicrometer
The invention relates to a making method of a nuclear track etching membrane, and the making method comprises the following steps: irradiating, namely irradiating a polymer film by using fission fragments produced by energetic ions or reactors produced by an accelerator; coating an anti-etching coating, namely coating an anti-etching coating on one side of the polymer film; etching, namely immersing the irradiated polymer film in an etching solution I for etching; removing the anti-etching coating, namely removing anti-etching material on the surface of the polymer film etched in the etching solution I; and drying, namely drying the etched polymer film. The making method is simple in process, easy to implement and low in cost; the method can be adopted to produce a singer-taper cellular nuclear track etching membrane with small pore end section circle diameter (D1) of 0.1-15 micrometers and large pore end section circle diameter (D2) of 0.2-20 micrometers.
Owner:CHINA INSTITUTE OF ATOMIC ENERGY
Heat melted composite type anti false film of nucleus track micropore
InactiveCN101004868AHigh tensile strengthSolve broken filmStampsIdentification meansHot meltPlastic film
A nuclear track micro-porous false proof film of hot-melten composite type is prepared for coating acrylate resin in thickness of 1-3.5micro on non-radiated surface of plastic nuclear radiated film, controlling a stripping intensity of acrylate resin to be 5-M / m-20N / m at 180deg.c, dry-plating plastic film in thickness of 10-25 micro on surface of acrylate resin layer and using dry-plated plastic film as stripping-protection layer.
Owner:허난구오안일렉트릭머터리얼컴퍼니리미티드
Nuclear track membrane and electrostatic spinning composite membrane and preparation method and application thereof
ActiveCN109603574AImprove breathabilityThe overall thickness is thinSemi-permeable membranesMembranesElectrospinningWastewater
The invention discloses a nuclear track membrane and electrostatic spinning composite membrane and a preparation method and application thereof. The composite membrane is composed of an electrostaticspinning layer, a nuclear track membrane and a base material from top to bottom. The composite membrane is high in rejection rate, good in air permeability and easy to clean; the composite membrane can be applied to the aspects such as liquid filtering and air filtering, and comprises the filter membrane industry fields of waste water treatment, oil-water separation, food and medicine, biochemicalengineering and the like.
Owner:INST OF MODERN PHYSICS CHINESE ACADEMY OF SCI
Manufacturing method for nuclear track etched membrane with single taper micropore
InactiveCN105233700ASimple processEasy to implementSemi-permeable membranesPolymer thin filmsIrradiation
A related manufacturing method for a nuclear track etched membrane with a single taper micropore comprises the following steps: preparing a bilaminar membrane, concretely, combining two polymer films with same specification together, so as to obtain the bilaminar membrane; performing irradiation, concretely, irradiating the bilaminar membrane by using energetic ion generated by an accelerator, and enabling the latent track generated through irradiation to penetrate the bilaminar membrane; etching, concretely, immersing the irradiated bilaminar membrane in an etching solution for etching; drying, concretely drying the etched bilaminar membrane; separating the two layers of the films of the dried bilaminar membrane, so as to obtain the nuclear track etched membrane with the single taper micropore. The provided manufacturing method is simple in technology, easy to control and low in cost. The manufacturing method can be used to prepare the heavy ion micropore membrane possessing the single taper micropore with the small-port end section circle diameter (D1) of 0.1-15 mu m and the large end-section circle diameter (D2) of 0.2-20 mu m.
Owner:CHINA INSTITUTE OF ATOMIC ENERGY
Nanometer watermark paper and manufacturing method thereof
ActiveCN1990953AStrong integrationThe largest application areaSpecial visual effect coatingsSpecial paperNanoparticleEngineering
The invention provides a nanometer watermarking paper and the manufacturing method, characterized in that microscopic stereo concave group is generated on the paper fault in random by nuclear track technology; nanometer grain is filled in them so as to form nanometer watermarking. Because individual behavior in mass microscopic grains can not be controlled by people currently, the equipment, material and technology of nanometer watermarking paper, which are disclosed, can not be copied. So the nanometer watermarking paper is provided with highest anti-counterfeiting degree and is widely applied in money, police, CIQ and taxation so on.
Owner:CHANGZHI QINGHUA MACHINERY FACTORY
Nuclear track anti-counterfeit transfer film and manufacturing method thereof
InactiveCN101239544AEasy to integrateEasy to controlDecorative surface effectsDuplicating/marking methodsEtchingPunching
The invention discloses a nuclear track security transfer film and the manufacturing method, which belong to the anti-counterfeiting technology field .The nuclear track security transfer film includes thermal transfer film and cold transfer film ,which are formed by coating a multi-mixed resin layer on PET coating ,and the multi-mixed resin layer can be transferred and can suppress laser. The preparation technology is as follows: the nuclear track is formed on a thermal transfer laser layer or a cold transfer laser layer after suppression of laser hologram, irradiation, imaging, chemical etching, cleaning in soft water and drying, thus the preparation of nuclear track security transfer film is completed. Besides, the thickness of the produced nuclear track security transfer film is only 1 micron or a few microns, the produced nuclear track security transfer film can attach the nuclear track which has anti-counterfeit feature to carriers having various packages by methods of heat and cold transfer without punching. The mature preparation technology is suitable for rapid completion of large quantities of additional anti-counterfeiting technology, and precision positioning. The problem that the bottom belt is easy to rupture in the conventional manufacturing of anti-counterfeit labels in a rapid labeling machine is avoided because of no punching.
Owner:TSINGHUA UNIV
Catalytic membrane reactor on basis of nuclear track membranes and method for preparing catalytic membrane reactor
ActiveCN108144559AImprove hydrophilicityImprove throughputOrganic compound preparationLiquid-liquid reaction processesFiltrationPorous channel
The invention provides a catalytic membrane reactor on the basis of nuclear track membranes and a method for preparing the catalytic membrane reactor. The method includes S1, fixing target nuclear track membranes onto molds, placing the target nuclear track membranes and the molds into given buffer solution together, adding dopamine hydrochloride and sodium periodate into the given buffer solutionand carrying out magnetic stirring to obtain nuclear track membranes with porous channels modified by polydopamine; S2, washing the nuclear track membranes with the porous channels modified by the polydopamine by the aid of given washing agents, and carrying out hydrothermal reaction treatment to obtain the target nuclear track membrane reactor. The catalytic membrane reactor and the method havethe advantages that straight-through hole structures of the nuclear track membranes and physical and chemical properties of dopamine can be sufficiently utilized, and accordingly the catalytic membrane reactor is good in universality; the hydrophilicity of the catalytic membrane reactor can be effectively improved, accordingly, the flux of membranes can be effectively enhanced, and the suction filtration efficiency can be obviously enhanced in suction filtration procedures.
Owner:TSINGHUA UNIV
Manufacturing method for nuclear track etching film
InactiveCN105148738ASimple processEasy to implementSemi-permeable membranesOptoelectronicsPolymer thin films
The invention relates to a manufacturing method for a nuclear track etching film. The manufacturing method comprises the following steps: irradiation: irradiating a polymer thin film by energetic ions which are generated by an accelerator and have proper energy, so that the range of the ions in the thin film is larger than 2 / 3 of the thickness of the thin film and smaller than the thickness of the thin film; etching: soaking the polymer thin film subjected to irradiation for etching; cleaning: cleaning the etched polymer thin film by clean water; drying: drying the cleaned thin film polymer. The manufacturing method provided by the invention is simple in technology, easy to implement and low in cost; by adoption of the method, a heavy ion microhole film with single conical microholes of which the diameter (D1) of the sectional circle at the small-aperture end is 0.1-15 microns and the diameter (D2) of the sectional circle at the large-aperture end is 0.2-20 microns can be manufactured.
Owner:CHINA INSTITUTE OF ATOMIC ENERGY
Packaging-integrated nuclear track anti-counterfeiting disk and manufacturing method thereof
ActiveCN102303439AWide applicabilitySolve integration problemsStampsSynthetic resin layered productsPack materialPlastic film
The invention discloses a packaging-integrated nuclear track anti-counterfeiting disk and a manufacturing method thereof, belonging to the technical field of nuclear track anti-counterfeiting. The nuclear track anti-counterfeiting disk comprises a rubber layer, a release layer, a one-layer nuclear track anti-counterfeiting film label, a laser layer or a metallic coating layer which are sequentially overlapped on a plastic film bottom belt, wherein the laser layer or metallic coating layer is thermally or cold transferred locally or completely on a hot melting gel layer. The one-layer nuclear track anti-counterfeiting film is punched according to the size of an anti-counterfeiting pattern and then waste is eliminated, and a composite material is coiled and trimmed, thus the packaging-integrated nuclear track anti-counterfeiting disk is manufactured. The laser layer can be used as a location marker when industrialized automatic hot-pasting is carried out, a nuclear track anti-counterfeiting film is industrially automatically positioned and thermally transferred to any package material by using the characteristic of hot melting transfer of the transfer laser layer, thus the industrial production integration of the nuclear track anti-counterfeiting film and the package materials is solved, and the nuclear track anti-counterfeiting film has the advantages of attractiveness and wide use and applicability.
Owner:TSINGHUA UNIV
Composite membrane used for filter and preparation method thereof
InactiveCN104941462ASimple structureReasonable designSemi-permeable membranesCompanion animalNuclear pore
The invention relates to the field of medical apparatus and instruments, in particular to a composite membrane used for a filter and a preparation method thereof and aims at providing the composite membrane which is used for the filter and capable of achieving industrial automation and guaranteeing the product quality and the preparation method thereof. The composite membrane is composed of a nuclear track membrane and a lining membrane; the nuclear track membrane and the lining membrane are bonded into a whole through a composite processing method, wherein the nuclear track membrane is made of PET, and the thickness of the nuclear track membrane ranges from 0.01 mm to 0.02 mm; the lining membrane is made of PE or PP, and the thickness of the lining membrane ranges from 0.1 mm to 0.15 mm. The composite membrane has the advantages of being simple in structure, reasonable in design, convenient to use and the like.
Owner:浙江润强医疗器械股份有限公司
Automatic beam spot calibration and beam adjustment device for nuclear track membrane production terminal
ActiveCN111867227AImprove product qualityReduce generationAcceleratorsTransmission channelData acquisition
The invention relates to an automatic beam spot calibration and beam adjustment device for a nuclear track membrane production terminal. The device comprises two beam signal detection devices, a dataacquisition device, a control computer and a power supply, the two beam signal detection devices are arranged in a transmission channel of a beam pipeline and are used for detecting a visible light video image capable of representing the beam position and shape of a beam in the transmission channel; the data acquisition device is used for acquiring visible light video images; and the control computer is used for analyzing the beam spot position and shape of the beam in the acquired visible light video image, and controlling the power supply to adjust the beam spot position and shape accordingto the analysis result, so as to realize automatic beam spot calibration and beam adjustment of the nuclear track membrane production terminal. The device can be widely applied to the production of the nuclear track membrane.
Owner:INST OF MODERN PHYSICS CHINESE ACADEMY OF SCI
Ventilation window of package
InactiveCN101698436AHigh porosityImprove breathabilityLiving organism packagingBagsFiberMolecular materials
The invention relates to a ventilation window of a package used for preserving fresh and alive foods and prolonging storage period. The ventilation window is arranged on the package, and a microporous ultrafine fiber non-woven membrane is arranged on a ventilation opening (hole) or at the position of a sealing edge or at the position of a seal by heat sealing or adhesion to ensure the package is well breathable, but cannot be permeated by water and can prevent intrusion by bacteria and spread of bacteria. The microporous ultrafine fiber non-woven membrane has a three-dimensional maze type structure and has a high aperture ratio, a ventilation property far better than other microporous membranes, such as nuclear track membranes and corrosion membranes, with a plane structure and low cost. The ventilation window using the microporous ultrafine fiber non-woven membrane made of a hydrophobic high molecular material prevents water in the package from being lost and external water from intruding as well as mouldness.
Owner:SHANDONG GUTEQI RUBBER
Sample nuclear track in-situ etching observation method and equipment
InactiveCN109556939AAvoid direct contactAvoid erosion damagePreparing sample for investigationMaterial analysis by optical meansObservation methodMicroscope
The invention discloses a sample nuclear track in-situ etching observation method and equipment. The sample nuclear track in-situ etching observation method comprises steps of putting a sample included in an isolation object between an etching liquid and a microscope objective, isolating the microscope objective from the etching liquid or volatile gas in the etching liquid through the isolation object so as to prevent contact, and performing real-time in-situ observation on the nuclear track etching process of the sample through the microscope objective. The method overcomes the difficulty inthe existing method that the nuclear track etching process cannot be observed in situ.
Owner:中国科学院青藏高原研究所
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