32results about How to "In situ generation" patented technology

The invention provides a triaxial test device for in-situ generation and decomposition of a natural gas hydrate. The device comprises a closed pressure chamber consisting of an outer cover barrel and a base; an inner cover barrel is arranged in the closed pressure chamber; the inner cover barrel is fixed on the base through a clamping ring; at least one oil inlet and outlet hole, at least one airinlet hole and at least one water inlet hole are formed on the base of the inner cover barrel; the oil inlet and outlet hole, the air inlet hole and the water inlet hole are formed on the inner cavity of the inner cover barrel; pistons are arranged on the tops of the outer cover barrel and the inner cover barrel; air exhaust holes are formed on the pistons; a lower pressure pad and an upper pressure pad which correspond to each other are arranged in the inner cavity of the inner cover barrel; the upper pressure pad corresponds to the positions of the pistons; and the lower pressure pad is fixed on the base.

The invention discloses an in-situ polymerization method for preparation of nylon 6/epoxide resin/silica dioxide nanocomposite, which consists of the following steps:a)preparing epoxide resin siloxane solution by graft reaction and hydrolytic reaction; b) before or in the aminocaprolactam cycle-open reaction, introducing the epoxide resin siloxane solution into the mediator of the said aminocaprolactam cycle-open reaction, simultaneously adding the water and the anti-oxidant; c) making the aminocaprolactam open ring and polymerize to prepare high-strength and super ductility nylon-6/epoxide resin/silica dioxide nanocomposite. The invention makes the silicate react with the hydroxy group of the epoxide resin under the accelerating effect, then dissolvent, water and acid (or alkali) are added to hydrolyze. Because the silicasol surface graft and adsorb epoxide resin, the agglomeration of the earth silicon nanoparticles can be effectively avoided. On the other hand, because the epoxy radicals can react with the amidol and the carboxyl of the nylon-6 molecular chain to form partial interpenetration network architecture, accordingly the diphasic boundary action can be effectively improved. It has a good cooperating knife-bar with the nano earth silicon, so it can largely improve the bruise resistance of the materials as well as the hot strength of the composite, in which the hot strength has increased by 30 % compared with nylon-6 and the bruise resistance is 3-5 times of the nylon-6.

The invention relates to a hardened porous electrode of a TiO2-C catalytic material as well as a preparation method and application of the hardened porous electrode. The electrode comprises a TiO2-C catalytic material, a binder and activated carbon; the TiO2-C catalytic material is uniformly mixed with a binder, activated carbon is doped into the TiO2-C catalytic material to form a framework, andan electrode is internally provided with a pore structure. The TiO2-C composite catalytic material is combined with activated carbon, the catalytic material with the same surface area is reduced, andthe usage amount of the TiO2-C composite catalytic material is greatly reduced, so that the cost of the catalytic material is greatly reduced, meanwhile, the good catalytic performance is still kept,the recycle of an electrode material can also be realized, and the reusability is good.

The invention provides a preparation method of cuprous oxide antibacterial textile. The preparation method includes: pretreating cellulose fiber fabric with a low-temperature plasma, introducing an amino group to the surface of the fabric, and meanwhile, etching the surface of the cellulose fiber fabric; coating with a silk peptide solution; soaking and rolling with a copper acetate solution, reducing the water solubility of silk peptides and improving the binding fastness of silk peptides and copper ions to the textile by using -COOH and -HN2 coordination on copper ions and silk peptide molecules; performing in-situ formation of cuprous oxide on the textile to obtain the antibacterial textile. The textile is good in antibacterial resistance and resistant to washing.

The invention discloses a process method of adipic acid by cyclohexane oxidation. The process method comprises the following steps: a step (a) of oxidation, namely introducing cyclohexane, solvent, catalyst and oxygen-containing gas continuously into an oxidation reactor to react, so as to obtain a oxidation reaction solution containing adipic acid and six-carbon oxygen-containing compound; a step (b) of liquid-liquid stratification, namely stratifying the oxidation reaction solution obtained in the step (a) at the temperature of 50-160 DEG C and the pressure of 0.1-1.2MPa, so that an upper oil-phase containing cyclohexane and six-carbon oxygen-containing compound and a lower solvent-phase containing adipic acid and six-carbon oxygen-containing compound are obtained; step (c) of separation of adipic acid, namely cooling, crystallizing and filtrating the lower solvent-phase obtained in the step (b), so that the filtrate and the adipic acid product are obtained. The process method has the advantages of simple technology, low cost, high efficiency, high raw material conversion rate and good target product selectivity; the conversion rate of the cyclohexane is higher than 99% and the selectivity of the adipic acid is higher than 91%.

The invention discloses a nano calcium peroxide resin matrix composite for removing formaldehyde in air and a preparation method of the nano calcium peroxide resin matrix composite, and belongs to the field of indoor air pollution control. The nano calcium peroxide resin matrix composite comprises an oxidizing agent and a carrier, the carrier is macroporous adsorption type styrene resin SD300, the oxidizing agent is in-situ generated nanoscale CaO2 (nCaO2) on SD300, the reagent used for in-situ generation of nCaO2 comprises CaCl2, ammonia water and H2O2, and the mass ratios between resin and CaCl2, ammonia water and H2O2 are 1:(0.5-10), 1:(0.1-5) and 1:(5-15) respectively. The prepared nCaO2-SD300 composite has the advantages of large CaO2 supported quantity and difficulty in stripping off; formaldehyde can be converted into calcium formate, CO2 and H2O rapidly and enduringly at room temperature, secondary pollution is avoided, and safety is high; the composite is simple in production process, low in cost, convenient to use and wide in application range.

The embodiment of the invention discloses an Fe-based soft magnetic composite material and a preparation method thereof. The method comprises the following steps of: performing plasma spheroidizationtreatment on Fe-based magnetic powder; obtaining spheroidal magnetic powder; and performing surface bluing treatment on the spheroidal magnetic powder to obtain a Fe-based soft magnetic composite material. According to the embodiment of the invention, the powder is subjected to plasma spheroidization treatment to obtain fine and spheroidal Fe-based soft magnetic alloy powder. The spheroidal Fe-based soft magnetic alloy powder is subjected to bluing treatment to perform in-situ generation of a magnetic insulating coating layer at the surface of the Fe-based magnetic powder to finally obtain thespheroidal Fe-based metal soft magnetic powder with the uniform and dense coating layer so as to achieve the purpose of improving the magnetic permeability and the saturation flux density of the magnetic powder cores.

The invention relates to a spinel-yttrium aluminum garnet fireproof material and a preparation method thereof. The preparation method comprises the following steps: firstly with 40-50wt% of magnesia particles, 10-30wt% of spinel particles, 10-20wt% of magnesia powder, 10-20wt% of alumina powder, 3-7wt% of spinel powder and 0.5-7wt% of dry blend material as raw materials, additionally adding a binding agent accounting for 3-7wt% of the raw material, stirring uniformly, and carrying out mechanical pressing; and then drying a moulded green body for 12-36 hours at 110 DEG C, then baking at 1450-1650 DEG C, preserving heat for 2-8 hours to obtain the spinel-yttrium aluminum garnet fireproof material. The preparation method of the dry blend material comprises the following steps: firstly with 20-40wt% of metal aluminum powder, 25-40wt% of aluminum nitride and 30-50wt% of compound containing yttrium as the raw materials, putting the raw materials into a ball mill for dry blending uniformly, and preparing the dry blend material. The prepared spinel-yttrium aluminum garnet fireproof material not only has higher refractoriness, refractoriness under load and high temperature strength, but also has good anti-erosion performance and thermal shock resistance.

The invention relates to a preparation method of a tough wear-resistant silicon nitride based composite ceramic. The preparation method comprises following steps: (1) mixing following components in percentage by weight: 80 to 95% of alpha-Si3N4 powder and 5 to 20% of a C4H6CoO4.4H2O water solution, and stirring the solution by a magnetic force under a heating condition until the solvent is totally evaporated to obtain mixed powder; (2) crushing the mixed powder, sieving the mixed powder by a 100-mesh sieve, filling the mixed powder into a steel die, and pre-pressing the mixed powder to obtain a pre-pressed sample; (3) sintering the pre-pressed sample at a high temperature under a high pressure, and cooling the sample in the furnace to obtain a blank; and (4) polishing the surface of the blank to obtain silicon nitride based composite ceramic. The technology is simple and controllable, the production efficiency is high, the powder does not need any special treatment, and the preparation method is suitable for massive production. The high temperature toughness and wear resistant performance of the prepared finished product are excellent. The service life of ceramic parts in a high temperature environment is largely prolonged.

The invention discloses a generation device and an observation method for interface nanobubbles.The device comprises a reaction kettle composed of a kettle body and a kettle cover, a base is arranged in the reaction kettle, a liquid tank is arranged on the base, a placement bottom sheet is arranged in the liquid tank, and a bubble forming substrate is arranged on the placement bottom sheet. By adopting the device, the detachable liquid tank is arranged in the reaction kettle, and then the bubble forming substrate is arranged in the liquid tank, so that in-situ generation of the interface nanobubbles is realized, and compared with a generation mode of transferring decomposition liquid to a hydrophobic substrate, a bubble nucleation mode is consistent with a process of actually decomposing natural gas hydrate to form the interface nanobubbles, the mode is close to objective conditions of natural gas hydrate depressurization decomposition and interface nanobubble formation in an actual reservoir, meanwhile, the influence of substrate properties on experimental results is reduced, and the reliability of observation results is ensured.