32 results about "High energy irradiation" patented technology

A process for modifying the surface of an inorganic or organic substrate with strongly adherent nanoparticles is described, providing to the surface modified substrate durable effects like hydrophobicity, hydrophilicity, electrical conductivity, magnetic properties, flame retardance, color, adhesion, roughness, scratch resistance, UV-absorbance, antimicrobial properties, antifouling properties, antiprotein properties, antistatic properties, antifog properties, release properties. In this process, an optional first step a) a low-temperature plasma, ozonization, high energy irradiation, corona discharge or a flame is caused to act on the inorganic or organic substrate, and in a second step b) one or more defined nanoparticles or mixtures of defined nanoparticles with monomers, containing at least one ethylenically unsaturated group, or solutions, suspensions or emulsions of the afore-mentioned substances, are applied, preferably at normal pressure, to the inorganic or organic substrate. In a third step c) suitable methods are applied to dry or cure those afore-mentioned substances and, optionally, in a fourth step d) a further coating is applied on the substrate so pretreated.

There is provided a method to modify biodegradable polymers using the direct reaction of a biodegradable polymer in a vinyl monomer and may take place in the presence of initiators. The initiator may be free radical initiators, heat, ionic initiators, UV irradiation, ionizing irradiation and other high energy irradiation. Suitable biodegradable polymer include polycaprolactone, poly(lactic acid), poly(glycolic acid) and poly(lactic-co-glycolic acid). Suitable vinyl monomers include acrylates, methacrylates and the like.

A membrane includes a porous base membrane and a hydrophilic coating. The coating comprises a hydrophilic additive and a hydrophilic polymer derivatized with an electron beam reactive group adapted to form a radical under high energy irradiation. In some embodiments, the membrane comprises a fluoropolymer. Also disclosed are processes for forming the membrane.

A membrane includes a base membrane; and an electron beam functionalized coating, the coating comprising a polyvinyl alcohol, a polyvinyl alcohol-polyvinyl amine copolymer, a polyvinyl amine, and derivatives thereof functionalized with an electron beam reactive group adapted to form a radical under high energy irradiation. Also disclosed are processes for forming the membrane.

The invention discloses a method for preparing functionalized graphene based on a high-energy irradiation one-step method. The method comprises the following steps of: mixing graphite oxide and polar small molecular organic solvent, and performing ultrasonic dispersion treatment on the mixed solution for 0.5 to 2 hours, wherein the polar small molecular organic solvent is one or more of epoxy chloropropane, styrene/ acetone solution, acrylic acid and lactic acid; and putting the dispersion in an irradiation source chamber of 60 Co, performing gamma ray irradiation on the mixed solution under the conditions that the irradiation dose rate is 0.6*10<3> to 6*10<3>Gy/h and the irradiation dose is 1*10<4> to 2*10<6>Gy, so that the surface of the graphite oxide is peeled, and functionalized graphene nano sheets are formed. By using the characteristics of high energy and strong penetrating power of gamma ray particles in the method, the functionalized small molecular organic substance intercalated into graphite oxide layers and the graphite oxide layers undergo grafting reaction, so that the distance between the graphite oxide layers is increased, and the graphene nano sheets are formed by peeling.

The directional strengthen regulating radiotherapeutic apparatus includes shielding and protecting assembly, focusing units, strengthen regulating board and driving mechanism. The advantage of the present invention is that the independently rotated and focused units may be laid in different angles to focus the dispersive rays, such as gamma rays, onto the disease focus, so that the disease focus obtains high energy irradiation while the health tissue obtains very lower irradiation, reaching stereo directional treatment. By means of the control of the switches and speeds of the focusing units and the strengthen regulating board, the spatial distribution of the dosage absorbed by the disease focus is regulated and the important tissue of the patient may be protected by means of the independent switching function.

A method for modifying aramid fiber with a silane coupling agent, the method comprises four steps of cleaning and drying the fiber surface, chlorination reaction on the fiber surface, hydroxylation reaction on the fiber surface and grafting silane coupling agent reaction on the fiber surface. The invention adopts gamma ray high-energy irradiation to treat aramid fibers, and uses 1,4-dichlorobutane as a grafting agent to irradiate aramid fibers and 1,4-dichlorobutane to initiate grafting on the fiber surface reaction, introduce -Cl functional group, and then use NaOH solution to carry out hydroxylation treatment, convert -Cl to -OH, introduce -OH on the surface of the fiber, and finally react the hydroxylated aramid fiber with the aminosilane coupling agent KH550 to activate Fiber surface, improve fiber interface performance. The process of the invention is simple and efficient, the fibers can be processed in batches, the reaction solvent can be reused many times, the invention is green and environmentally friendly, and is suitable for large-scale industrial production.

The present invention provides a high-energy ion injection device, which carries out scanning, parallelization, and filtering on high-energy ion beams through an electric field. The high-energy ion injection device (100) comprises: a high energy multi-segment straight line accelerating unit (14), which accelerates the ion beam and thereby generating the high-energy ion beam; a deflection unit (16), which carries out direction conversion on the high-energy ion beam toward a semiconductor wafer; irradiation beam transmission line unit (18), which transmits the deflected high-energy ion beam to the wafer. The irradiation beam transmission line unit (18) comprises an irradiation beam reshaper (32), a high-energy irradiation beam scanner (34), and a high-energy electric field irradiation beam parallelization device (36), and an electric field final energy filter (38).

The present invention relates to a high efficiency irradiation beam transmission technology of a high-energy ion injection device. The high-energy ion injection device comprises an irradiation beam generation unit, having an ion source and a quality analyzing device; a high-energy multi-segment straight line acceleration unit, which accelerates an ion beam to generate a high-energy ion beam; a deflection unit of a high-energy irradiation beam, which carries out direction conversion on the high-energy ion beam toward the direction of a wafer; and an irradiation beam transmission line unit which transmits the deflected high-energy ion beam to the wafer. The deflection unit is made of a plurality of deflection electric magnets, and at least a transverse convergence member inserted among the plurality of deflection electric magnets.

The invention relates to the technical field of coating materials, in particular to a temporary protection coating for UV illumination demolding and application of the temporary protection coating. When holes are directly drilled in the surface of a multi-layer PCB, copper cuttings are easily generated, and the drilling precision is influenced. In order to solve the problems, the invention provides a temporary protection coating material for UV illumination demolding, wherein a free photoinitiator in the coating material absorbs energy under a specific emission wavelength to initiate photocuring of the coating material system, so that a temporary protection coating is formed on the surface of a PCB multilayer circuit board, wherein the specific emission wavelength perfectly avoids the absorption wavelength range of the photoinitiator 2959, after drilling, the PCB multilayer circuit board is placed under a high-pressure mercury lamp for high-energy irradiation, the photoinitiator 2959 fragment of the modified polyurethane structure in the temporary protection coating can absorb a large amount of energy to break, the temporary protection coating is fragmented, and finally, strong shrinkage occurs under the action of high energy, so that automatic stripping from the surface of the PCB multilayer circuit can be realized.

We describe a method for patterning of colloidal nanocrystals films that combines a high energy beam treatment with a step of cation exchange. The high energy irradiation causes cross-linking of the ligand molecules present at the nanocrystal surface, and the cross-linked molecules act as a mask for the subsequent cation exchange reaction. Consequently, in the following step of cation exchange, the regions that have not been exposed to beam irradiation are chemically transformed, while the exposed ones remain unchanged. This selective protection allows the design of patterns that are formed by chemically different nanocrystals, yet in a homogeneous nanocrystal film.

The invention discloses an amphiphilic polymer PVP-g-PVDF-g-DMF and a preparation method and application thereof. The amphiphilic polymer PVP-g-PVDF-g-DMF is prepared from PVDF resin which is a main component of a casting solution for a PVDF separation membrane, a super-hydrophilic solvent micromolecular N,N-dimethylformamide (DMF) and a hydrophilic macromolecular pore forming agent polyvinylpyrrolidone (PVP) by a high energy irradiation method; and the amphiphilic polymer can be used for preparing a hydrophilic modified PVDF membrane. The material components used for preparing the amphiphilic polymer are all from a material system for preparing a PVDF separation membrane, and no other substances are added; the obtained modified material system can be directly used without being separated or purified; and the irradiation grafting reaction process is pollution-free and environmentally-friendly, can be performed at room temperature, and is uniform in reaction, simple to operate, stable in process and reliable in quality, thereby being suitable for industrial production.

The present invention provides a high-energy-irradiation-resistant self-lubricating fabric liner, a preparation method and a self-lubricating fabric composite material, and relates to the technical field of functional materials. By taking g-C3N4 and multi-layer graphene as a composite solid lubricant, the requirements of the self-lubricating fabric liner on low friction and abrasion resistance aremet. Meanwhile, the unique six-membered ring structure of the g-C3N4 and multi-layer graphene endows the self-lubricating fabric liner with the certain irradiation resistance, thereby prolonging theservice life of the self-lubricating fabric liner. In addition, by flexible conversion of chemical valence of cerium in cerium dioxide, the irradiation resistance of matrix resin (phenolic resin) is effectively improved. Moreover, the preparation method of the self-lubricating fabric liner is simple, environment-friendly and pollution-free. Furthermore, the self-lubricating fabric composite material formed by the high-energy-irradiation-resistant self-lubricating fabric liner has excellent high energy irradiation resistance and tribology performance.

The invention discloses a method for demulsifying emulsion in wastewater; comprising: 1), grafting glycidyl methacrylate to polypropylene nonwoven by means of ultrasonic irradiation or high-energy irradiation within a grafting range of 5%-120%; 2), opening epoxy groups of the glycidyl methacrylate on the surface of the polypropylene nonwoven by using an amine having 4-19 carbons, and constructing hydrophilic and hydrophobic sites on the surface of the polypropylene nonwoven to obtain the modified propylene nonwoven; 3), placing the modified polypropylene nonwoven in emulsion at 10-100 DEG C, stirring for 5-40 min to demulsify the emulsion, wherein a weight ratio of the modified polypropylene nonwoven to the emulsion is 0.01% to 10%. The method has no need for any energy, is low in cost, and is applicable to large-scale wastewater treatment; the method is free of any chemical reagents and is free of other pollutants to a water body.

The invention relates to crosslinkable, thermoplastic polyamide molding compounds. The polyamides are selected from a group comprising amorphous or microcrystalline polyamides, copolyamides thereof and blends thereof, as well as blends of such polyamides with semicrystalline polyamides. A polyamide molding compound according to the invention is characterized in that it comprises a crosslinking additive which causes the production of crosslinked molded parts formed from said polyamide molding compound under the effect of high-energy irradiation, having a Tg value of >140° C. and a minimum dimensional stability of 90% at temperatures of ≧180° C. These polyamides have a substantially linear structure and the monomers thereof have no olefin C═C double bonds. Corresponding crosslinked polyamide molded parts produced from a polyamide molding compound and the use of this polyamide molding compound to produce these crosslinked polyamide molded parts are additionally disclosed.

A method for producing a sterilized medical molded body by high energy irradiation of the medical molded body with an exposure dose E, the medical molded body being formed from a resin composition comprising: 100 parts by weight of a block copolymer hydride in which 99% or more of the total unsaturated bond of a block copolymer is hydrogenated, the block copolymer comprising a polymer block (A) that is composed mainly of a unit derived from an aromatic vinyl compound and a polymer block (B) that is composed mainly of a unit derived from a chain conjugated diene compound with a ratio of the weight fraction of the polymer block (A) and the polymer block (B) being 30:70 to 70:30; and a phenolic antioxidant in an amount of parts by weight represented by formula 1: W=[0.46x(100-H)+0.04]x(E/25) (In the formula, W is the parts by weight of the antioxidant with respect to 100 parts by weight of the block copolymer hydride, H is a hydrogenation degree of the block copolymer hydride indicated in % units, H is a numerical value of 99 to 100, and E is an exposure dose of high energy rays indicated in kGy units) or more and 0.50 parts by weight or less.