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50 results about "Chemistry radiation" patented technology

Radiation chemistry is a subdivision of nuclear chemistry which is the study of the chemical effects of radiation on matter; this is very different from radiochemistry as no radioactivity needs to be present in the material which is being chemically changed by the radiation.

Design method for central laboratory of whole nuclear power station

InactiveCN102644393AReasonable layoutSatisfy the experimental operation processIndustrial buildingsRadiation chemistryDesign standard
The invention belongs to subitem design technology of nuclear power stations, and particularly relates to a design method for a central laboratory of a whole nuclear power station. By means of formulating a design standard specification system and a design criterion which are applicable to the central laboratory of the whole nuclear power station, the design method for the central laboratory of the whole nuclear power station is provided. The design method is a technical method including dividing regions of functional units of the laboratory; determining the specifications and the quantity of experimental analysis instruments; analyzing the scale of workshops of the laboratory; and designing auxiliary facilities of the workshops. On the basis, finished subitem workshop functions, overall arrangement and workshop scale designing can guarantee overall arrangement reasonableness of the process laboratory, the auxiliary supporting facilities and office facilities, meet orderly running of operation procedures of all chemical analysis items of the nuclear power station, ensure timeliness and accuracy of chemical and radiation chemistry parameter analysis results of the whole nuclear power station, and meet requirements on safety production and stable running of various systems of the nuclear power station.
Owner:CHINA NUCLEAR POWER ENG CO LTD

Synthesis method of sulfur-doped reduced graphene used for adsorbing organic pollutants

The invention belongs to the technical fields of radiation chemistry and graphene nano-materials, and provides a synthesis method of sulfur-doped reduced graphene used for adsorbing organic pollutants. The method comprises the following steps: preparing an ethanol solution of graphene oxide, with the concentration of 0.5-2 mg/mL, adding polyethylene glycol 1500 to make the concentration be 0.075-0.15 mg/L, carrying out ultrasonic dispersion for 30-60 min to dissolve water-soluble sulfides in the obtained graphene oxide suspension in order to make a mass concentration ratio of sulfur to graphene oxide be 1:1 to 1:5, adding 20-100 mL of isopropanol, stirring the obtained solution for 30-60 min, adding 4-15 mL of an ammonia water solution, and irradiating the obtained solution with electron beams at an irradiating dose of 70-350 kGy; and sequentially cleaning the obtained material with ethanol and distilled water after the irradiation is finished, centrifuging the cleaned material, repeating the cleaning and centrifuging steps, and drying the obtained solid to obtain a dried solid which is the sulfur-doped reduced graphene. The technical problems of complex preparation technology, use of toxic and harmful reagents, high reaction temperature and poor adsorption performance in the prior art are solved.
Owner:肖硕 +2

PET alloy material, special compatibilizer thereof and preparation method thereof

The invention discloses a radiation grafting compatibilizer modified PET alloy material, a special compatibilizer thereof and a preparation method thereof. The graft copolymer consists of a main chainformed by the structural units shown by formula I and a branched chain formed by the structural units shown by formula II; -CH2- in the formula II is connected with -CH2- in the formula I by chemicalbond; and the grafting rate is 0.09-0.18%. The preparation method of the graft copolymer comprises the steps: in inert atmosphere, evenly mixing PET, acrylic acid and polymerization inhibitor and then irradiating to have graft copolymerization reaction, and finally obtaining the graft copolymer; and the irradiation dose rate is 0.8-1.5kGy/h, and the absorbed dose is 20-30kGy. The PET alloy material comprises the components based on parts by weight: 68-85 parts of the PET, 15-20 parts of toughening agent, 0.1-0.2 part of antioxidant and 3-12 parts of the graft copolymer. The PET alloy materialis prepared by evenly mixing the components and melt extrusion. The invention not only expands the application of radiation chemistry in the field of preparing PET engineering material, but also provides the PET alloy material with excellent performance, thus having wide application value.
Owner:UNIV OF SCI & TECH OF CHINA

Gamma-ray radiochromic solution and radiation dosemeter prepared by using the same

ActiveCN102433112AExtended linear range of color changeShow eye-catchingChemical dosimetersTenebresent compositionsRadiation chemistryNuclear technology
The invention, belonging to the field of radiation chemistry and nuclear technology, discloses a gamma-ray radiochromic solution, comprising the following ingredients: 0.02-1 weight portions of dye, 0-0.5 weight portions of photoinitiator, 0-0.5 weight portions of anti-oxidant, 0-10 weight portions of organic solvent, and the rest sovlent consisting of 100 weight portions of distilled water. The invention further discloses a radiation dosemeter prepared by using the gamma-ray radiochromic solution, comprises a radiochromic device and a colorimetric device. The gamma-ray radiochromic solution and the radiation dosemeter are suitable for large scale industrial irradiation. According to the invention, a test result of the radiation dosemeter is timely and intuitionistic, the radiation dosemeter can guide production on site to guarantee the irradiation quality, the radiation dosemeter can be placed in any position and even in the package of an object being irradiated to prevent pollution; the radiation dosemeter is fit for any object being irradiated, and even can be placed in a liquid or cream object being irradiated; the gamma-ray radiochromic solution is stable under the conditions of room temperature and room light illumination, and has equivalence that is close to the equivalence of the object being irradiated; and the gamma-ray radiochromic solution has the advantages of simple formula and preparation, easy obtainment of raw materials, and low cost, and the precision of the gamma-ray radiochromic solution is suitable for large scale irradiation processing.
Owner:SAAS BIOTECH & NUCLEAR TECH RES INST
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