88results about How to "Controllable reaction rate" patented technology

The invention relates to a composite foundation with a discrete material pile restrained through microorganism soil solidification and a construction method. The construction method includes the steps that a, a pile pipe is pressed into a foundation body; b, meanwhile, microorganism bacterium liquid is injected into a gap between an inner steel sleeve and an outer steel sleeve and diffused into the foundation body around the pile; c, the microorganism bacterium liquid is pumped out, a cementing solution is injected and diffused into the foundation body around the pile and reacts with the microorganism bacterium liquid to generate calcium carbonate crystals, and loose sandy soil or floury soil is cemented; d, the step b and the step c are repeated until the soil around the pile meets reinforcement requirements; e, discrete materials are poured into a hole of the inner steel sleeve; and f, a bed course is laid, so that the composite foundation is formed. According to the composite foundation with the discrete material pile restrained through microorganism soil solidification, the microorganism bacterium liquid and the cementing solution react to generate calcium carbonate so as to solidify the soil around the pile, so that the strength of the soil around the pile is improved, and the discrete material pile is protected against the problems of different pile diameters, bulging damage, pile hole caving and the like; the microorganism solidified soil and the pile can be combined to bear loads, and thus the bearing capacity of the single pile is improved.

The invention discloses high-solid low-viscosity hydroxy acrylic resin as well as a preparation method and application thereof. During preparation, a first part of solvent and mono-glycidyl ether are added into a reaction kettle, stirred and heated to 140-180 DEG C; a first part of initiator and a chain transfer agent are added into an acrylic monomer mixture, the obtained mixture is dropwise added into a reaction kettle within 3-6 h, and the temperature is kept for 0.5-1h after dropwise addition; the residual initiator and the residual solvent are mixed uniformly and added into the reaction kettle within 20-40 min, the temperature is kept for 1-2 h after the addition is completed, a hydroxyl oligomer is added, stirring is performed for 30-60 min, the temperature is lowered for material discharge, and the high-solid low-viscosity hydroxy acrylic resin is obtained. The resin solid accounts for 70% or higher, the viscosity is as low as 300mPa*s. The technology for preparing the hydroxy acrylic resin is simple, the cost is low, and a bi-component polyurethane coating film has excellent water resistance, acid and alkali resistance and mechanical properties.

The invention relates to an aluminum alloy/hydroboron hydrolysis reaction-based miniature hydrogen production system and a hydrogen production method thereof, belonging to the field of hydrogen preparation technique. The aluminum alloy/hydroboron hydrolysis reaction-based miniature hydrogen production system comprises a hydrogen production generator and a liquid storage tank, wherein the hydrogen production generator is coated by the liquid storage tank; an outlet at the bottom end of the liquid storage tank is connected with a hydrogen production generator liquid delivery pipe, a liquid delivery control valve, a stainless steel pipe and a reaction region; the top end of the liquid delivery pipe is connected with a hydrogen storage chamber; the hydrogen production generator is divided into a reaction chamber and the hydrogen storage chamber by a separation film; and two symmetrical circular truncated cones are arranged at the bottom of the reaction region. The hydrogen production method of the aluminum alloy/hydroboron hydrolysis reaction-based miniature hydrogen production system is characterized in that the hydroboron solution input velocity of the liquid delivery control valve is regulated to realize the start/stop of the hydrolysis reaction of the hydrogen production system, so as to stabilize the hydrogen pressure of the hydrogen production system. The aluminum alloy/hydroboron hydrolysis reaction-based miniature hydrogen production system and the hydrogen production method have the characteristics of being simple in structure, and safe and reliable, and suitable for supplying hydrogen for portable fuel cells or internal combustion engines.

For extending the uses of a compound represented by, Chemical formula 1, the object of the present invention is to provide a derivative of cyclic tetrasaccharide whose physicochemical properties are changed from those of cyclic tetrasaccaride, a composition comprising the same, and a process for producing the same. The present invention solves the above object by providing a derivative of cyclic tetrasaccharide, which is produced by the steps of reacting a compound represented by Chemical formula 1 with a reactive reagent and substituting one ore more hydroxyl groups with substituents except hydroxyl group and O-glycosyl group; a composition comprising the same; and a process for producing the derivative of cyclic tetrasaccharide. Chemical formula 1

The invention provides a silicon wafer molding processing method. The silicon wafer molding processing method comprises the following steps of cutting a silicon rod into a silicon wafer by adopting amulti-line acid corrosion cutting process; chamfering the silicon wafer; grinding the surface of the silicon wafer after chamfering; and polishing the ground silicon wafer after grinding. According tothe silicon wafer forming processing method, the silicon rod is cut by adopting a multi-line acid corrosion cutting process, the ultrathin silicon wafer can be obtained, the processing efficiency ishigh, the quality is good, the various reaction rates are controllable, the problems that the silicon wafer is long in cutting time and large in noise in the traditional silicon wafer forming processing process, and the quality of the silicon wafer obtained by cutting cannot meet the requirements are solved.

The invention relates to a preparation method of epoxy resin-based polymer monolithic column; a given quantity of the epoxy resin and firming agents and a low molecular weight polymer mixture with a good compatibility used as pore-forming agents are added in an empty tube column; solidification temperature is controlled so as to regulate the speed of polymerization reaction; after the solidification is finished, the pore-forming agents are removed by washing so as to get the polymer monolithic column. The preparation process of the invention is simple and environmental friendly. The invention also discloses a dedicated mould. The monolithic column can be made into various specifications and forms as required and has the advantages of evenly distributed aperture, adjustable size, strong hydrophilic property, acid and alkali resistance, solvent resistance and good thermostabilization; and a large number of reactive functional groups are contained in the chemical constitution of the material of the monolithic column, which is suitable for performing a plurality of chemical modifications to an inner surface of a pore canal so as to further functionalize. The preparation method of the epoxy resin-based polymer monolithic column can be applied extensively to the fields such as the extraction and recovery of solid phase, the preparation of chromatogram, the separation of biological medicines, the environmental protection and the catalysis etc.

The invention provides a polyamino acid graft copolymer, a preparation method thereof and an injectable hydrogel. The polyamino acid graft copolymer is shown in a formula (I). Compared with a natural polymer, the polyamino acid graft copolymer takes poly (L-glutamic acid) with a formula (V) structure as a main chain, natural protein and polypeptide can be simulated in a certain extent, and the polyamino acid graft copolymer has excellent biocompatibility and degradability; the graft polymer is provided with a branch chain with a formula (II) structure and comprises a phenol structure, different grafting ratios can be adjusted, cross-linking can happen under the action of HRP (horse radish peroxidase) and hydrogen peroxide, the formation condition is mild, and the reaction rate is easy to control, so that the injectable hydrogel with higher mechanical strength can be prepared; and the graft copolymer further comprises a branch chain with a formula (III) structure, and the different grafting ratios can be adjusted, so that the polyamino acid graft copolymer shown as the formula (1) has excellent water solubility.

The invention discloses a preparation method for a nano-scale spinel nickel-doped lithium manganate material. The method comprises the following steps: accurately weighing lithium salt, manganese salt and nickel salt in a mole ratio of lithium ion to manganese ion to nickel ion of 1:1.92:0.08 in a molecular formula of LiNi0.08Mn1.82O4 and placing into a beaker; stirring and dissolving in a defined amount of distilled water at 50 DEG C and forming a uniform mixed solution, and then dropwise adding an oxidizing agent while stirring and keeping the temperature for 5-15min; heating under a constant temperature at 100 DEG C, evaporating a certain volume of water in the solution and then transferring into a porcelain crucible; placing the porcelain crucible filled with the solution into a temperature programming box type resistance furnace at 150 DEG C, keeping the temperature and heating for 5min, performing combustion reaction for 30-60 min under 400 DEG C air atmosphere, keeping the temperature at 500 DEG C for 1-2h, cooling and then grinding; secondarily roasting the ground powder at 600-700 DEG C, keeping the temperature for 3-6h and grinding again, thereby acquiring the final product. An anode material prepared according to the invention has excellent circulating stability.

The invention relates to a synthesis method and application of superabsorbent resin microspheres with antibacterial properties. The synthesis method comprises the following steps: (1) adding a certain amount of magnetic ordered mesoporous carbon nanospheres and a polymer dispersing agent to a certain amount of water, performing full and even stirring, then performing vacuum and/or ultrasonic-assisted degassing treatment for 1-2 h, adding a certain amount of acrylic acid, performing even stirring, and controlling the temperature at 35-45 DEG C; (2) adding a certain amount of sodium hydroxide to the system obtained in the step (1) while stirring, and controlling the temperature at 65-75 DEG C in the reaction process; (3) adding a certain amount of a composite crosslinking agent and an initiator, and controlling the temperature at 80-90 DEG C for a reaction for 2-3 hours so as to form a semi-finished product superabsorbent resin colloid, wherein the composite crosslinking agent is a mixture of NMBA and PEGDA; and (4) putting the superabsorbent resin colloid obtained in the step (3) in a certain amount of a solvent, performing rinsing for 1-3 times, adding a certain amount of a nano-silver antibacterial agent, performing drying until the moisture content at less than 3%, performing pulverization to a certain particle size, and performing magnetic separation so as to obtain the superabsorbent resin finished product.

The invention discloses flaky porous nickel boride powder and a preparation method thereof and belongs to the technical field of inorganic powder preparation. The powder is crystalline-state NiB and is composed of nanosheets with the average thickness of 20 nm and the plane view size of 200-300 nm. The nanosheets are connected in a staggered mode to form an open porous structure. The powder is prepared through the steps that micron-order metallic nickel powder, amorphous boron powder and alkali chloride powder are mixed; the mixed powder is put in a corundum crucible and heated to 1,000 DEG C or above under argon protection, and natural cooling is carried out after heat preservation is carried out for 0.5-2 h; the obtained product is soaked with water for 1-3 h, filtered, washed multiple times with water and ethyl alcohol respectively and dried, and the flaky porous NiB powder is obtained. The obtained nickel boride powder is in a crystalline state, has a flaky porous structure, can serve as a catalyst carrier material and also is a potential inorganic functional material.

The invention provides a magnesium or magnesium alloy surface autocatalytic degradation coating and a preparation method thereof. Phosphate and ferrite or ferric salt are used as raw materials, a chemical conversion method is adopted to prepare a coating capable of accelerating magnesium alloy degradation on the surface of a magnesium or magnesium alloy matrix, and the obtained coating is phosphate and hydroxide of iron and ferrous iron. The composite coating is a cathode type porous coating; since the open-circuit potential is higher than that of a magnesium alloy matrix, and meanwhile, elementary iron generated by reduction of iron or ferrous ions can form galvanic corrosion with the magnesium alloy, so that the effect of accelerating corrosion of the magnesium alloy is achieved, and further, autocatalytic degradation of the magnesium alloy is realized. A new way of thinking is created in the invention. Compared with the prior art, the method disclosed by the invention has the characteristics of environment-friendly and simple process, short reaction time, low production cost, no damage to a matrix structure and mechanical properties and the like. The obtained magnesium alloy surface coating has the advantages of being porous in structure, good in biodegradability and biocompatibility and the like, and therefore the magnesium alloy surface coating can be used as a structuralmaterial and can also be used as a degradable biomedical material.

The invention provides preparation and application of a silicon nitride coated carbon nano tube, and belongs to the technical field of functional materials. A preparation method of the silicon nitridecoated carbon nano tube comprises the following steps that S1, the carbon nano tube is loaded into a whole reaction kettle in a loosening mode and the whole reaction kettle is filled with the carbonnano tube, and then vacuumizing is carried out to 0.1-100Pa; then silicon tetrachloride gas is introduced into the reaction kettle to initial pressure in the reaction kettle being in a range of 1-2atm; then ammonia gas is introduced continuously and reacts with the silicon tetrachloride gas under -20-60 DEG C, and a nitrogenous silane compound generated by the silicon tetrachloride gas and the ammonia gas is deposited on the surface of the carbon nano tube; S2, at an ammonia gas atmosphere, the carbon nano tube attached with the nitrogenous silane compound on the surface in the S1 is heated to500-600 DEG C, and heat treatment is carried out for 1-2 hours; and S3, continuous heating is carried out to 650-1200 DEG C, heat treatment is carried out for 2-8 hours, so that the nitrogenous silane compound is decomposed into amorphous silicon nitride, and the amorphous silicon nitride is uniformly deposited on the surface of the carbon nano tube. According to the preparation and application of the silicon nitride coated carbon nano tube, industrial production requirement and application of the silicon nitride coated carbon nano tube can be realized.

Fuel cell (FC) is one of chemical power sources and is characterized in that it is capable of converting chemical energy directly to electric energy by inputting negative active materials (fuels, to be oxidated) and positive active materials (oxidant, such as air or oxygen generally) deposited outside the cell into two poles of the cell, wherein the energy conversion is not limited by heat engine efficiency and can reach 100% in theory, and it is not necessary to charge the cell. If the fuel used is hydrogen, the exhaust gas discharged is water, without polluting the environment, therefore such a fuel cell is a perfect energy conversion device which can be used in a middle or mini type power station for replacing a heat engine and can be used as a power supply for an electromotion vehicle, space navigation or remote areas. Such a fuel cell is even used for generating electricity by utilizing some chemical reactions in chemical plants (such as that chloride and hydrogen react to synthesis hydrogen chloride in chlor-alkali industry to reclaim one part energy).

The invention belongs to the technical field of waste recycling and discloses a copper-based nickel plating-gold plating layer waste plating piece metal gradient recovery method. The method comprisesthe following steps of 1, putting plating pieces into ethyl alcohol to conduct cleaning to remove surface greasy dirt and then conducting cleaning through deionized water; 2, conducting gold solutiontreatment on the cleaned plating pieces; 3, conducting nickel solution treatment on the plating pieces subjected to gold solution treatment; 3.1, washing the surfaces of the plating pieces subjected to gold solution treatment through deionized water. Through the copper-based nickel plating-gold plating layer waste plating piece metal gradient recovery method, reaction is controllable; a gold plating layer on the outermost side of a base body can be quickly and selectively removed in priority, corrosion dissolution to a metallic nickel layer under the gold plating layer is small, and the purpose of separating and recycling metallic gold is achieved; the metallic nickel layer on the surface of each degolded plating piece is selectively separated and recycled; and finally, selective separation and recycling of gold, nickel and copper in the plating pieces are realized.

The invention relates to a self-heating composite foam fracturing fluid capable of being controlled in real time and an on-site construction method. The composite foam fracturing fluid comprises the following components in percentage by weight: 87.9-92.97% of base fluid, 6-10% of catalytic fluid, 1.0-1.8% of cross-linking fluid and 0.03-0.3% of gel breaker, wherein the base fluid is prepared from a composite thickening agent, a gas heat agent, a foaming agent, an acid stabilizer and liquid preparation water; the catalytic liquid consists of acid, a scale inhibitor and water, and is used when being prepared; the cross-linking liquid comprises a surfactant and a cross-linking agent. The on-site construction method comprises the following steps: respectively preparing a base solution and a catalytic solution according to a proportion before construction, sucking the base solution by a fracturing blender truck during construction, respectively adding a crosslinking solution and a gel breaker by a liquid adding pump and a dry adding system, pumping the catalytic solution from an outlet pipeline of a sand mixing tank by charging skid-mounted equipment, mixing the components, and then adding the crosslinking solution and the gel breaker into the sand mixing tank. The composite foam fracturing fluid which is resistant to high temperature and high salt, high in sand carrying performance, low in corrosion and low in damage is formed, the viscosity of crude oil can be effectively reduced, energy can be increased, discharge can be assisted, damage can be reduced, and productivity can be improved.

The invention discloses a hydrolysis hydrogen production device, which comprises a hydrogen generator, a water storage tank, a water pump, a pressure sensor, a control valve and a controller, whereinthe hydrogen generator comprises an outer shell and a fuel box placed in the outer shell; a hydrogen generator cover plate is arranged at a top opening of the outer shell; an outlet of the water storage tank is communicated with a water inlet of the hydrogen generator through a water pump; the gas outlet in the outer shell is communicated with external hydrogen consumption equipment through a control valve; the pressure sensor is used for detecting the hydrogen pressure in the hydrogen generator, the output end of the pressure sensor is connected with the input end of the controller, and the output end of the controller is connected with the control end of the water pump. The device has the advantages of being convenient to replace fuel, safe to carry, easy to control the reaction rate andlow in cost.

The invention provides a device and method for producing methane by coupling printing and dyeing wastewater treated by a three-dimensional electrode, and belongs to the technical field of comprehensive utilization of wastewater. The device comprises a CO2 storage tank, an electrolyte generating tank, an electrolytic bath, activated carbon particles, a cathode electrode plate, an anode electrode plate, a direct-current stabilized power supply, a cation exchange membrane, a cathode product gas collecting device and an anode product gas collecting device. The cation exchange membrane is fixed between the two electrode plates and divides the internal space of the electrolytic cell into two electrode chambers, the electrolyte generating tank is connected with a cathode chamber of the electrolytic cell through two pipes to form electrolyte circulation, and the upper parts of the cathode and anode chambers are respectively communicated with respective product gas collecting devices through conduits. According to the device, carbon dioxide can be reduced by the cathode to generate methane while printing and dyeing wastewater is treated by the anode, gas products in the two chambers can becompletely separated by the ion exchange membrane, methane collection of the cathode is facilitated, and the aims of treatment of degradation-resistant wastewater and emission reduction of carbon dioxide are fulfilled.

The invention relates to a lead ion repairing material for soil remediation and a preparation method thereof. The lead ion repairing material for the soil remediation is composed of ammonium salt modified nano polylactic acid, an Sr-10 emulsifier, water, ethanol and urea modified polyacrylic acid; the ammonium salt modified nano polylactic acid is prepared by taking acid modified nano polylactic acid, ammonia water, amino acid, the ethanol and urea to react; the acid modified nano polylactic acid is prepared by taking modified nano polylactic acid, chlorosulfonic acid, acetic acid, oxalic acidand formic acid to react; the modified nano polylactic acid is prepared by taking polylactic acid, lignin, maleic anhydride, the ethanol, N,N-dimethylformamide, nanocellulose and the urea to react; and the urea modified polyacrylic acid is prepared by taking acrylic acid, isooctyl acrylate, the urea, the Sr-10 emulsifier, the water, the ethanol and ammonium persulfate to react. The lead ion repairing material for the soil remediation, provided by the invention, has excellent performance of removing migration-state lead ions of soil.

The invention provides a glucose-like peptide and a preparation method thereof as well as injectable hydrogel. The preparation method comprises the following steps: mixing one or more compounds with the structures shown as formulas (V-1) to (V-3), a compound with the structure of a formula (IV), a compound with the structure of a formula (VI) and an organic solvent, and reacting in the presence of a catalyst to obtain the glucose-like peptide with the structure of the formula (I). Compared with an existing natural polymer, the glucose-like peptide has the advantages that the compound with the structure of the formula (IV) serves as a main chain, the glucose-like peptide has a secondary structure similar to that of natural proteins or polypeptides and also has high biocompatibility and biodegradability; the glucose-like peptide can simulate the structure of protein polysaccharides in an extracellular matrix; the glucose-like peptide contains a phenol structure, different grafting rates can be regulated, a cross-linked network can be formed under the effects of horse radish peroxidase and hydrogen peroxide, the reaction condition is mild, the reaction rate is easily controlled, and the hydrogel with controllable performance can be prepared.

The invention discloses sheet-like porous CoB powder and a preparation method thereof and belongs to the technical field of inorganic powder preparation. The powder is CoB in a crystalline state and consists of nanosheets with the average thickness being 20 nm and the plane size being 200-300 nm, and the nanosheets are connected in a staggered manner to form an open porous structure. The preparation method of the powder comprises specific preparation steps as follows: micron-order metal cobalt powder, amorphous boron powder and alkali metal chloride powder are mixed; the mixed powder is placed in an corundum crucible, heated to 800 DEG C or above under the protection of argon, kept at the temperature for 0.5-2 h and then cooled naturally; an obtained product is soaked in water, filtered, cleaned and dried, and the sheet-like porous CoB powder is obtained. The obtained CoB powder is in the crystalline state, adopts the sheet-like porous structure, can be used as a catalyst carrier material and is a potential inorganic functional material.

The invention relates to a pretreatment method of waste water containing fluoronitrophenol, and belongs to the pesticide chemical field. The invention aims to solve the technical problems that biochemical treatment of the waste water containing fluoronitrophenol is difficult to realize and unsafety problem of concentration and enrichment process is obvious. The invention discloses the pretreatmentmethod of the waste water containing fluoronitrophenol. The method comprises the steps of firstly adjusting the pH of the waste water, then performing thermal degradation under certain temperature and finally detecting the degraded waste water by liquid chromatogram. According to the pretreatment method of waste water containing fluoronitrophenol, organic matters containing the fluoronitrophenolare thermally degraded into substances that are relatively safe and can be subjected to advanced treatment, the operation is safe and no explosion risk exists.