70results about How to "Great potential for industrial applications" patented technology

The invention discloses shewanella spp and application thereof in a microbial fuel cell and relates to the technical field of biology. The shewanella spp is shewanella xiamenensis sp.nov.S4 preserved in the 'China Center for Type Culture Collection' in January, 2009 with the preservation number of CCTCC M 209017. The shewanella spp has the characteristics of negative Gram stain, rod-shaped and straight thallus, two circular ends, diameter of 0.3 to 1.2mu m, length of 2.5 to 5.8mu m, single or paired existence and short-chain arrangement, single flagella on the thallus, mobility, capability of producing electricity in a seawater environment and higher electricity production activity and is obtained by separating marine sediments near the sea.

The invention discloses a tee corner extruding automatic continuous processing equipment and a processing method thereof, relating to the field of material processing, particularly relating to a tee corner extruding equipment which can automatically and continuously process and produce superfine crystals or nanocrystalline metal-base materials and a method thereof. The invention includes a mould, a first punch, a second punch, a third punch and a feeding and discharging opening. Tee corner extruding cavities are arranged in three neighboring directions in the mould, the first punch, the second bunch and the third punch are arranged in the three cavities respectively; the feeding and discharging opening is arranged in the direction of the other side; the cross-section size of the feeding and discharging opening is larger than the first punch, the second punch and the third punch; the first punch, the second punch and the third punch are connected with a hydraulic control system respectively. The invention is simple in structure, easy to be operated and has an extensive application scope.

The invention relates to a processing device for synthesizing a surface layer of a nano-composite material in situ by performing friction stir processing (FSP) on a metal workpiece through a stirring head capable of synchronously feeding powder, and a method. A clamping part 1, a shaft shoulder 2 and a stirring probe 3 of the stirring head can be a rigid whole body or a fastening coaxial separated body; a powder feeding channel A is arranged in the stirring head; the inlet of the channel A is positioned on the side or middle axial position of the clamping part 1; and the outlet of the channelA is positioned on the surface of the middle axial position of the probe 3, which is contacted with the workpiece. During processing, a hydraulic device in a worktable capable of automatically lifting is used for pressurizing along the axial direction B of the stirring head, a rotating shaft drives the stirring head to rotate at high speed and press the workpiece, an external automatic powder feeder feeds sub-micron reinforcing phase powder into a seriously plasticized area C on the surface layer of the workpiece through the powder feeding channel A of the stirring head, and the nano-composite material is synthesized in situ through friction heat. The device is simple, is convenient to operate, is suitable for the composition and structure refining of various metal substrates, and is highin technical and economic benefit and industrial application potential.

The invention discloses shewanella and application thereof in a microbiological fuel cell, and relates to the technical field of biology. The shewanella is Shewanella marisflavi EP1 which is preserved in 'China Center for Type Culture Collection' in January 2009 with the preservation number of CCTCC M 209016. The shewanella is characterized in that: the shewanella is gram-negative; the thalli are rod-shaped and straight; two ends are circular; the diameter is 0.3 to 1.0 micro; the length is 2.5 to 6.0 micros; the thalli can singly exist or are arranged in pair or in a short-chain shape; and the thalli have autogenetic flagella and can move. The shewanella is separated from offshore ocean sediments, has wide salt ion concentration tolerance activity, and can generate power in electrode liquid at the concentration of up to 8 percent. Therefore, the internal resistance of the microbiological fuel cell is effectively reduced.

The invention provides a nitryl asymmetric alpha-diimine nickel complex for preparation of ultrahigh-molecular-weight polyethylene and an intermediate, a preparation method and application of the nitryl asymmetric alpha-diimine nickel complex. The nickel complex has a single catalytic active center, regulation of polymer molecular weight and branching degrees can be realized through changing of aligand structure and polymerization conditions, and high catalytic activity, low cost, performance stability and the like are achieved. The preparation method is mild in condition, short in period andsimple in operation condition. The nickel complex can be applied to catalytic vinyl polymerization, the catalytic activity is up to 4.61*10<6>g mol<-1>(Ni) h<-1>, the weight-average molecular weightMw of prepared polyethylene fluctuates in a range of 8.2-32.8*10<5>g mol<-1>, molecular weight distribution is in a range of 1.8-2.8, the remarkable performance of polyethylene molecular weight control is achieved, and the nickel complex can be used for preparation of ultrahigh-molecular-weight polyethylene; obtained polyethylene is high in branching degree, the melt temperature Tm is in a range of 76.9-117.2 DEG C, and accordingly the polyethylene can be used as engineering plastic at a high environment temperature, and a promising industrial application potential is achieved.

The invention discloses the application of a nickel sulfide/carbon nanotube flexible composite film material in the electrode of a lithium ion battery. The preparation method of the composite film material comprises the steps that urea and nickel nitrate are added to an aqueous solution of ethanol, and then a silicon oxide/carbon nanotube film is added, immersed and removed at room temperature, placed in an oven at 100 DEG C to 110 DEG C for 10 to 15h, cooled naturally at room temperature, washed and dried to acquire a silicate/carbon nanotube film for standby; deionized water is mixed with ethanol, and Na2S is added as a sulfur source to prepare a solution with a concentration of 1 to 2.5mg/mL; the silicate/carbon nanotube film is immersed in the solution, reacts at 150 to 200 DEG C for 10 to 15h; and natural cooling, washing and drying are carried out to acquire the nickel sulfide/carbon nanotube flexible composite film material. The nickel sulfide/carbon nanotube flexible compositefilm material can be directly used as the negative electrode material of the lithium ion battery.

The invention provides a 4,4'-difluorobenzhydryl containing asymmetric alpha-diimine nickel complex, and an intermediate, a preparation method and an application thereof. The nickel complex prepared by using the method provided by the invention has a single catalytic active center, can realize control of polymer molecular weight and branching degree by changing a ligand structure and polymerization conditions, and has the advantages of high catalytic activity, low cost, stable performance, etc. The preparation method has the advantages of mild conditions, short cycle and simple operation conditions. The nickel complex prepared by using the method provided by the invention can be used in a catalyst used for ethylene polymerization, and has the activity of catalyzing ethylene polymerization up to 2.20 * 10<7> g.mol<-1>(Ni).h<-1> under the condition of no oxygen; and the prepared polyethylene has a weight-average molecular weight Mw fluctuating in a range of (1.35-10.50) * 10<5> g.mol<-1> and molecular weight distribution in a range of 1.9 to 2.5. The nickel complex provided by the invention has good industrial application prospects.

The invention belongs to the field of biochemical engineering and discloses bacillus subtilis and application thereof in preparation of niacin by biocatalysis. The niacin is prepared by reacting 3-cyanopyridine serving as a substrate with bacillus subtilis KR2 (CGMCC NO.3242) serving as a biocatalyst at 5 to 35 DEG C and 100 to 300rpm for 15 to 96h, wherein the final yield of the niacin is over 90 percent and the purity of the obtained niacin is over 98 percent. The method of the invention is simple in operation and mild in reaction condition, and is suitable for application in scale industrial production.

The invention belongs to the technical field of molecular sieve catalysts, and discloses a Pd-based alloy packaged molecular sieve catalyst, a preparation method and applications thereof. The molecular sieve catalyst comprises a sodalite molecular sieve, and PdM nano-alloy particles are packaged in the sodalite molecular sieve; the preparation method comprises the following steps: firstly preparing a sodalite molecular sieve, then impregnating and loading Pd metal and an M metal precursor, roasting and reducing to form a molecular sieve catalyst impregnated and loaded with nano alloy particles; then uniformly mixing with a silica-alumina sol solution, uniformly stirring and mixing the solution, evaporating the solution to dryness, then adding ethylene glycol, grinding the mixture into uniform paste, carrying out hydrothermal reaction, and cooling, washing, drying, roasting and reducing the reaction product to obtain the catalyst. The molecular sieve catalyst is applied to acetylene selective hydrogenation reaction, can avoid an excessive hydrogenation process, and has relatively high acetylene conversion rate and ethylene selectivity.

The invention provides a diphenylmethyl-containing asymmetric diimine pyridine complex with nitro-enhanced thermal stability and catalytic activity, and a preparation method and application thereof. The complex has a single catalytic activity center, the molecular weight of a polymer can be regulated and controlled by changing a ligand structure and polymerization conditions, and the complex has the advantages of high catalytic activity, low cost, stable performance and the like. The complex and intermediates thereof have the advantages of mild preparation conditions, short period, simple operation conditions and the like. The asymmetric complex can be applied to a catalyst for ethylene polymerization and has high catalytic activity, and high molecular weight (up to 599.5 kg/mol) linear polyethylene is obtained; especially, the provided iron complex is high in thermal stability, and even at a high temperature of 100 DEG C, the catalytic activity can still be kept at 3.86* 10<6> g*mol<-1>(Fe)*h<-1>. Compared with reported non-nitro substituents (CH3, Cl), the complex has the highest activity and molecular weight. Therefore, the complex can be used at a high environmental temperatureas engineering plastic, and has great industrial application potential.

The invention relates to a cholesterol oxidase affinity matrix formed by linking a cholesterol oxidase affinity ligand and a chromatography media; more preferably, the cholesterol oxidase affinity ligand is FAD (Flavin Adenine Dinucleotide) segmental riboflavin and the chromatography media is Sepharose, chitosan or polyvinyl benzene; the invention further provides a synthesis method for cholesterol oxidase affinity matrix, and a large-scale purification method for cholesterol oxidase by using the cholesterol oxidase affinity matrix; the cholesterol oxidase can be rapidly separated and purified in large scale by using the cholesterol oxidase affinity matrix provided by the invention; on the condition of only using one step of affinity chromatography, the pure cholesterol oxidase is obtained; the consumption time of the entire purification step is short, the active recovery rate of protein is higher and the large-scale popularization and application is applicable.

The invention discloses a class of fluorine-containing alpha-diimine nickel coordination compounds for preparing a polyolefin elastomer, and an intermediate thereof, wherein the coordination compoundhas a single catalytic activity center, the molecular weight of a polymer can be regulated and controlled by changing a ligand structure and polymerization conditions, and the coordination compound has the advantages of high catalytic activity, low cost, stable performance and the like. The invention further provides preparation methods of an asymmetric alpha-diimine nickel coordination compound containing a difluoro group, and an intermediate thereof, wherein the two preparation methods have the advantages of mild reaction conditions, short period, simple operation conditions and the like. The invention also provides uses of a metal nickel coordination compound and a catalyst system thereof, wherein the metal nickel coordination compound is used for catalyzing ethylene polymerization, shows good catalytic activity and obtains a polyethylene elastomer material with narrow molecular weight distribution. The obtained polyethylene elastomer material is high in branching degree, has good tensile strength, elongation at break and elastic resilience, is a thermoplastic elastomer material and has great industrial application potential.

The invention discloses a stirring dispersing process for inoculating and refining aluminum alloy through amorphous alloy and relates to the field of aluminum alloy processing. The stirring dispersing process comprises the four steps of preparation of the amorphous alloy, preparation of an amorphous ribbon, preparation of non-incubated aluminum alloy and inoculation of the aluminum alloy. With the adoption of the technical scheme, the steps are reasonable, the refining efficiency is high, obdurability of the aluminum alloy is improved significantly, inoculation is efficient, cost is low, and the stirring dispersing process has great industrial application potential and value.

The invention discloses a recombinant plasmid for producing L-pipecolinic acid, a high-yield genetic engineering strain capable of enhancing heterogonous synthesis metabolic pathways of L-pipecolinic acid, and a production method of pipecolinic acid. The invention further discloses a preparation method of the recombinant plasmid and the genetic engineering strain. The strategy of constructing the high-yield genetic engineering strain comprises the following steps: adopting pTrc99a single-plasmid multi-gene tandem expression, linking L-lysine-alpha-oxidase genes (LysoX), glucose dehydrogenase genes (gcd), Pip2C reductase genes (DpkA) and lysine transportase genes (lysQ), optimizing a regulatory element for controlling transcription and translation in front of each gene, transforming the constructed plasmid pLMAIP-05 into competent cells of BL21 (DE3) of essential genes (cadA) in a knockout lysine degradation pathway, thereby obtaining the high-yield genetic engineering strain (MLPR08) capable of enhancing heterogonous synthesis metabolic pathways of L-pipecolinic acid. Due to expression of the lysine transportase, the rate of transporting a substrate L-lysine into the cells is improved, the fermentation time is shortened, and synthesis of the L-pipecolinic acid is further promoted.

The invention relates to a squaramide-derived covalent triazine skeleton polymer and application thereof in catalyzing coupling of carbon dioxide and epoxide to prepare cyclic carbonate. Squaramide monomers are used as raw materials, a series of squaramide-derived covalent triazine skeleton polymers are synthesized through a high-temperature ionothermal method, and the squaramide-derived covalent triazine skeleton polymers are used as catalysts to prepare cyclic carbonate. According to the method, carbon dioxide and epoxide with different substituent groups are used as raw materials, corresponding cyclic carbonate is synthesized under the conditions that the reaction pressure is 0.1-2.5 MPa, the reaction temperature is 70-110 DEG C and the reaction time is 2-6 hours, and high-selectivity catalysis of synthesis of cyclic carbonate under mild, metal-free and solvent-free conditions is realized. The polymer shows excellent adsorption and conversion dual functions on carbon dioxide, the catalytic activity is not obviously reduced after five catalytic cycles, the problem that a homogeneous catalyst is not easy to separate is solved, and the polymer has a good application prospect.

The invention discloses a laser and arc compound welding method which comprises the following steps: (1) activating pulse laser and controlling a synchronous pulse signal; (2) activating an alternating current arc, and carrying out pulse laser-alternating current arc compound welding; and (3) in a welding process, adjusting the arc current to 40-500 A, the laser pulse peak value power to 1-6 KW, the basic value power to 200-1000 W, the laser pulse frequency to 10-100 Hz, the distance Dla between a laser impact point to the center of an arc molten bath to 1-6 mm and the distance from the tip ofan electrode to a workpiece to 1-5 mm till welding is finished. By coordination control between the pulse laser and alternating current arc negative half-wave regions, the arc stability can be improved, the surface forming of a welding region can be improved, and depth of fusion is increased by 1-2 times; by enhancing discharge in the alternating current arc negative half wave region by pulse laser, influence of processing parameters and environmental factors to welding stability can be reduced while the arc stability in a high speed condition is improved.

The invention provides a method for constructing a super-hydrophobic PVDF nanofiber membrane based on interface self-polymerization and application of the super-hydrophobic PVDF nanofiber membrane, and particularly relates to the technical field of super-hydrophobic materials. The preparation method comprises the following steps: dissolving PVDF in N, N-dimethylformamide to prepare a membrane casting solution, preparing a PVDF nanofiber base membrane by using an electrostatic spinning process, dissolving OTS containing active groups in an organic solvent, sequentially adding nanoparticles, PDMS and a cross-linking agent to prepare an oil-phase reaction solution, soaking the base membrane in ethanol, cleaning with deionized water, drying water drops on the surface of the base membrane by blowing, pouring the oil-phase reaction solution into the surface of the base membrane, introducing a high-hydrophobicity silane polymer into PDMS in situ by utilizing a hydrolysis self-polymerization reaction of OTS on a water-oil interface, pouring away the oil-phase reaction solution, and cleaning and drying a membrane body to obtain the super-hydrophobic PVDF nanofiber membrane. The method is simple in preparation process, does not need a modification device, is excellent in hydrophobicity and stable in property, is suitable for the fields of oil-water separation, self-cleaning coatings, membrane distillation and the like, and has a good industrial application prospect.