91results about How to "Change surface structure" patented technology

The invention discloses a preparation method and an application of a nitrogen-doped carbon fiber/nitrogen-doped graphene/bacterial cellulose membrane material, relates to a preparation method and an application of a membrane material and aims to solve the problem that a flexible electrode material prepared with a conventional method does not have good stability, cycle performance and mechanical properties. The method comprises the following steps: preparing bacterial cellulose pulp; preparing a bacterial cellulose and graphene composite; preparing a polypyrrole coated bacterial cellulose and graphene composite; preparing a nitrogen-doped carbon fiber/nitrogen-doped graphene composite through high-temperature carbonization; preparing a nitrogen-doped carbon fiber/nitrogen-doped graphene dispersing agent; performing vacuum pumping filtration on the bacterial cellulose pulp for membrane forming, adding the dispersing agent for continuous pumping filtration for membrane forming, and performing vacuum drying for finishing. The membrane material has low equipment corrosion, low cost, good cycle performance and good mechanical properties and can realize scale production, and a symmetrical supercapacitor prepared from the membrane material has the good capacitive character. The invention belongs to the technical field of nanomaterials.

The invention discloses a method for processing heavy metal Cd contaminated soil, which is characterized by comprising the steps of adding rhamnolipid aqueous solution with concentration of 0.5-2g/L into a negative electrolytic tank, adding deionized water into a positive electrolytic tank, installing a filter cloth between the Cd contaminated soil needed to process and the negative electrolytic tank as well as the positive electrolytic tank, installing a permeable reaction wall on an enrichment place of the heavy metal Cd far away from five eighth of an anode S3, and switching on to electronically repair the Cd contaminated soil. The Cd concentration rate is above 4 times higher than an initial value; and under the function, the concentration rate is reduced to about 3.63 times, the total removal ratio of the heavy value Cd of the whole soil is about 40%, and the contribution ratio of the permeable reaction wall on the removal ratio is about 90%, so that the alkaline rhamnolipid solution proves that the process of the heavy metal from enrichment to removal can be realized by the electrical repair and the permeable reaction wall. The method is simple in operation condition, wide in range of application, low in cost, high in efficiency, liable to realize, and has the better social benefit and biological benefit on the heavy metal Cd contaminated soil.

The invention discloses a porous fine denier nylon fiber used for water collection. Through appropriate processing of a nylon fiber, the porous fine denier nylon fiber can be prepared. The porous fine denier nylon fiber is of a certain micro/nano structure, moisture in air can be condensed into small water drops on the surface of the porous fine denier nylon fiber, the small water drops move directionally on the surface of the fiber to converge to form large water drops, finally the large water drops are separated from the surface of the fiber to enable the surface of the fiber to restore, and therefore the porous fine denier nylon fiber has the effect of a phase shift catalyst. The large water drops obtained through convergence can be obtained through collection, and therefore a potential solution is provided for solving the problem of water resource shortage.

An ion exchange process for reinforcing the surface of NaCaSi or NaAlSi glass substrate of magnetic record disc features use of both dipping and dual temp zones. Beside its surface is reinforced by K ion exchange, the salts of Li, K and Na ions are in one temp zone and their relative atmosphere is in another temp zone for ion exchange. Its advantage is high effect.

A silicon nitride film, for example, is deposited by introducing into a plasma region of a chamber a silicon containing gas, molecular nitrogen and sufficient hydrogen to dissociate the nitrogen to allow the silicon and nitrogen to react to form a silicon nitride film on a surface adjacent the plasma region. The thus deposited film may then be subjected to an activation anneal.

The invention discloses preparation and application of a Sb-Ni-Nd co-doping SnO2 high catalytic activity positive electrode, and belongs to the technical field of electrochemical water treatment. A micropore titanium (mp-Ti) plate is used as a matrix, and a SnO2-Sb-Ni-Nd composite oxide coating is immobilized on the mp-Ti plate. (1) A modified sol using citric acid and ethylene glycol as matrixes and containing SnCl4, SbCl3, NiSO4 and NdCl3 is prepared; (2) after pretreatment of the mp-Ti plate, the mp-Ti plate is impregnated in the modified sol of the step (1), brushed and dried, then is calcined at high temperature, finally is rinsed with water, and dried for stand-by use. The Sb-Ni-Nd co-doping SnO2 high catalytic activity positive electrode is used for electrocatalytic oxidation of phenol which is a pollutant difficult to biodegrade in water, results show that the remove phenol ability is strong, and the organic matter mineralization rate is significantly higher than that of electrodes in the prior art. The prepred Sb-Ni-Nd co-doping SnO2 high catalytic activity electrode is high in catalytic activity and good in stability, and has a good industrial application prospect.

The invention discloses a preparation method of an iron-cobalt alloy/nitrogen co-doped carbon aerogel electrode material, and relates to the field of catalyst preparation. The preparation method comprises the following steps: dispersing sodium alginate and polypyrrole in water to form a first solution, and dispersing ferric salt and cobalt salt in water to form a second solution; dropwise adding the first solution into the second solution, standing for 1h to obtain hydrogel, freeze-drying, performing calcining in nitrogen at high temperature for 1h, and pickling a sample to obtain carbon aerogel; and dipping and doping the solid powder into melamine, performing drying, and performing roasting in N2 to obtain the sodium alginate-based iron-cobalt alloy/nitrogen co-doped electrode material.The catalyst has oxygen reduction (ORR) and oxygen evolution (OER) bifunctional catalytic performance, and the zinc-air battery assembled by the catalyst has high power density and good charging and discharging performance. According to the method, cheap biomass seaweed is recycled, the preparation process is non-toxic and harmless, the cost is low, and the method has a wide industrial applicationprospect.

The invention relates to a mould release agent and a preparation method thereof and the application of the mould release agent in the preparation of a polyurethane mould product. According to the formula, the mould release agent comprises the following components: a) polysiloxane with a hydroxyl functional group, b) polysiloxane with a hydrogen silane functional group, c) an organic solvent, and d) a catalyst. The preparation method comprises the following steps of: adding the substance a), the substance b) and the substance d) into the substance c); and reacting by heating or at normal temperature for a certain period of time to obtain a finished mould release agent, wherein one or more kinds of catalysts d) can be added into the reaction simultaneously or step by step, and the finished mould release agent is used for preparing the polyurethane mould product. After the mould release agent is sprayed every time, effective mould release is performed for more than 20 times and even can be performed for 100 times without the cleaning of a mould, so that the mould release agent can be used repeatedly; mould release performance is not reduced along with the increase of the mould release frequency; and the surface skin structure of the polyurethane mould product can be controlled, so that the product has high surface quality.

The invention provides a Ni-doped TiO2 microporous anode, a preparation method and an application, and belongs to the technical field of electrochemical water treatment. Sb-Sn-Ni is directly composited and deposited on a microporous Ti (mp-Ti) plate used as the substrate in a pulse composite electrodeposition manner, then the deposited material is calcined under a muffle for 2 hours, and the Ti/Sb-SnO2-Ni electrocatalytic electrode is prepared. The electrode is used for electrocatalytic oxidation of phenol in water. Results show than the electrode has high phenol removal capacity and high organic matter mineralization rate. The prepared electrode has high catalytic activity, good stability and long service life, thereby having better application prospect.

The invention discloses a preparation method of porous spongy graphene. The preparation method comprises the following steps: putting graphite powder into a reaction vessel, adding concentrated sulfuric acid, sufficiently stirring and uniformly mixing, then adding ammonium persulfate, oxydol and thiocarbamide, and reacting at normal temperature to obtain spongy graphene; and putting the obtained spongy graphene in deionized water, soaking, and drying to obtain the porous spongy graphene. According to the invention, the porous spongy graphene is prepared from the graphite, concentrated sulfuric acid, ammonium persulfate, oxydol and thiocarbamide which are used as raw materials, wherein the ammonium persulfate and oxydol H2O2 can be decomposed to release ammonia gas and other gas in the reaction process, and some nitrogen/oxygen functional groups can be inserted between graphite layer molecular structures, so that the surface structure of the graphene is changed, thereby achieving high porosity and adsorption rate, being capable of adsorbing and eliminating pollutants in sewage, improving water quality of underground water, surface water and sewage, and protecting living and working environments; and the porous spongy graphene can adsorb various kinds of dye, oil and organic solvent.

The invention relates to a light-weight flexible irradiation-resistant cover glass which is composed of the following raw materials in percentage by mass: 50.8-62.5% of SiO2, 0.2-0.7% of Al2O3, 10-15.9% of B2O3, 8-10.6% of MgO, 3-6% of Na2O, 11.1-16.4% of Li2O, 0.1-0.5% of K2O, 4.6-5.1% of CeO2 and 0.2-1.6% of P2O5. The preparation method of the light-weight flexible irradiation-resistant cover glass comprises the following steps: A. proportioning; B. charging; C. melting; D. cast forming; E. annealing; F. cutting; G. grinding; H. polishing; I. cleaning; K. drying; and L. low-temperature ion exchange to obtain the light-weight flexible irradiation-resistant cover glass. The light-weight flexible irradiation-resistant cover glass has lighter weight, thereby reducing the take-off weight during satellite launching and lowering the launching cost.

The invention provides a method for modifying metal material surface through dielectric barrier discharge at atmospheric pressure and cold plasma jet, and belongs to the technical field of material surface processing. According to the method, through dielectric barrier discharge at atmospheric pressure, a large quantity of active particles are generated to mutually react with the metal material surface, oxidation, etching, cross-linking and other physical and chemical reactions happen, and the metal surface is modified. The cold plasma jet is generated by a cool plasma generator with a charging form being dielectric barrier discharge. When charging voltage is low, the cold plasma jet can conduct lyotropic modification on the metal material surface quickly, and the surface structure of the surface is not changed; when the charging voltage is high, the jet can quickly conduct modification, and change a microstructure of the surface at the same time, and thus the lyotropic modification effect is kept for long. The method for modifying the metal material surface through the dielectric barrier discharge at the atmospheric pressure and the cold plasma jet is high in processing efficiency, free of vacuum equipment, low in cost, simple and flexible in operation and free of pollution to environment, and is a novel green surface modification method.

The invention relates to the technical field of sewage treatment, in particular to modified attapulgite clay and a preparation method thereof. The preparation method of the modified attapulgite clay provided by the invention comprises the following steps: putting hexadecyl trimethyl ammonium bromide into ethanol, and performing stirring to obtain a hexadecyl trimethyl ammonium bromide ethanol solution; and adding attapulgite clay into the hexadecyl trimethyl ammonium bromide ethanol solution, performing stirring, and carrying out ultrasonic treatment after stirring, thereby obtaining the modified attapulgite clay. According to the preparation method of the modified attapulgite clay provided by the invention, the surface structure of the attapulgite clay can be effectively changed, and theadsorption performance of the attapulgite clay on heavy metal ions strontium is improved.

The invention belongs to the technical field of catalysts. The invention provides an ammonium molybdate modified catalyst. The ammonium molybdate modified catalyst comprises ammonium molybdate modified ferrous disulfide and molybdenum disulfide in a mass ratio of (9.5-10.5) : (1.5-2.5). Molybdenum disulfide is added into the catalyst, sulfur defects are easily formed in a hydrogen peroxide solution, sulfur defects and Fe < 2 + > double active sites promote decomposition of hydrogen peroxide to oxidize and decompose organic pollutants, ammonium molybdate increases the number of active sites of ferrous disulfide, and the catalytic efficiency is improved; meanwhile, on the basis of self-repairing, Fe < 3 + > on the surface of the catalyst is promoted to be converted into Fe < 2 + > due to existence of sulfur defects, so that the purpose of circulation is achieved, and secondary pollution cannot be caused in the whole sewage treatment process. The invention further provides a preparation method of the catalyst, ammonium molybdate modified ferrous disulfide and molybdenum disulfide are combined by adopting a ball milling process, the process is simple, the technology is mature, and the catalyst is suitable for large-scale popularization.

The invention discloses a sludge deep dehydration treatment method. The treatment method comprises the following steps: a) providing sludge suspension; b) adding an oxidant into the sludge suspension, and evenly mixing so that the sludge has oxidization reaction; and c) after the oxidization reaction is over, carrying out solid-liquid separation to obtain the sludge to be treated. According to the sludge deep dehydration treatment method, before the solid and liquid separation is conducted, the oxidization reaction is conducted to the sludge through the oxidant, the surface structure is effectively changed, extracellular polymers are peeled, cell walls are broken, so that the dehydration performance of sludge can be effectively improved, the reduction of absolute amount of the treated sludge, stacking and the like can be reduced; in addition, only fewer oxidants can be added, so that a great amount of medicaments and introduction of new pollutants can be avoided. Furthermore, a great amount of toxic and harmful substances in the sludge can be reduced, and the rapid deodorization of the sludge can be realized.

The present invention discloses a charcoal molecular sieve preparation method, which is characterized by comprising: pre-crushing petroleum coke, carrying out an impregnated oxidation intercalation expansion treatment on the raw material with an oxidizing agent and an intercalation agent, carrying out further fine crushing on the sample, adding a right amount of an adhesive, an adhesive auxiliary agent and water, kneading, carrying out molding treatment on the kneaded material after the uniform kneading, carrying out drying treatment on the molded material, carrying out carbonization, and carrying out controlled physical activation and carbon deposition pore adjusting treatment according to the requirement so as to obtain the charcoal molecular sieve. According to the present invention, the intercalation pretreatment is performed on the petroleum coke, such that the size of the microcrystalline is reduced, the formed distance d002 vaoue between the layer sheets is incrased, the developed micropores are provided, the surface structure of the petroleum coke is changed, the further activation hole adjusting treatment is easily achieved, and the obtained product has characteristics of high strength, rich micropore and narrow pore size distribution, and can be used for nitrogen production through PSA air separation, and enrichment of methane in gas or natural gas.

The invention relates to a surface treatment process of a dental implant and an application thereof, and belongs to the technical field of dental implanting. The surface treatment process of the dental implant includes the steps of carrying out acid etching treatment of an implant treated by rutile sand blasting and carrying out alkali treatment of the implant subjected to acid etching treatment.Sand blasting treatment on the surface of the implant with rutile sand makes the surface of the pure titanium implant free from interference of other impurity elements, and first-order holes can be effectively formed by large-particle sand blasting to promote bone bonding. Acid etching treatment can control the size and distribution of the holes on the implant surface, and makes the implant easierto bind to cells. Alkali treatment after acid etching can change the surface structure of the implant, so the implant has good hydrophilicity, can better perform direct interaction with proteins andcells in body fluid, and has higher biological activity.

A mechanical fastener is disclosed. The mechanical fastener generally comprises the male component of a hook and loop fastening system. The male component contains a plurality of protrusions that havebeen surface modified. In particular, the protrusions have been surfaced modified in a manner that prevents damage to a female component during engagement and disengagement but yet still forms a firmattachment with the female component.

The invention relates to an online monitoring device for the vibration and the creep of a high-temperature high-pressure pipeline, and belongs to an ultrasonic detection principle-based pipeline online-monitoring device. A fixed coordinate frame is fixedly connected with a bracket, wherein the bracket is fixedly connected with a base; four ultrasonic probes are arranged at the 1/2 positions of upper, lower, left and right coordinatometers of the fixed coordinate frame respectively, and are connected with outer ultrasonic probe sheaths in a sleeving way; the outer ultrasonic probe sheaths are adhered to measurement points of the outer wall of a heat-preservation layer; a signal output terminal of each ultrasonic probe is connected with an input terminal of a wireless acquirer respectively; power supply terminals of the wireless acquirer and the ultrasonic probes are connected with a power module respectively; a wireless transmitter is electrically connected with the wireless acquirer; the wireless acquirer and the power module are fixedly connected with a cross plate of the bracket. The device has the advantages of novel structure, higher sensitivity, convenience in mounting and maintenance, capability of synchronously monitoring the vibration, the creep value and the creep speed of the pipeline and important practical significance.

The invention relates to the field of novel functional nano materials, and discloses a preparation method and applications of fiber-phase red phosphorus nanoparticles. The method comprises the following steps: synthesizing zinc oxide nanoparticles through a hydrothermal method, depositing a layer of fiber-phase red phosphorus on the zinc oxide nanoparticles as a template through a chemical vapor deposition method, washing out the zinc oxide nanoparticles in the zinc oxide nanoparticle compound wrapped with the red phosphorus with diluted hydrochloric acid, and ultrasonically washing to obtainthe fiber-phase red phosphorus nanoparticles. The fiber-phase red phosphorus nanoparticles prepared by the method have good photo-thermal properties, can coordinate antibiotics to efficiently and quickly treat bacterial biofilm infection, and have good biocompatibility and good biodegradability.

The invention discloses a method for synthesizing 2-amino-5-chlorobenzophenone by a microchannel reactor, belongs to the field of synthesis of psychoactive drugs in organic synthesis, and solves the problems of low yield, poor purity, high risk of violent explosion, degradation caused by high reaction time under high temperature and high pressure conditions, low frequency of catalyst recycling andreuse and the like during the synthesis of a traditional catalytic hydrogenation reactor. The method for synthesizing the 2-amino-5-chlorobenzophenone in the microchannel reactor specifically includes the following steps: 1). adding hydrogenation reaction precursor 5-chloro-3-phenyl-2,1-benzisoxazole into an organic solvent, and then adding an activated-carbon-loaded noble metal catalyst to obtain a mixture as a material I to enter a preheating module of the microreactor; and 2). after preheating of the material I, injecting the material I and material II hydrogen into a reaction module groupof the microreactor for reaction, collecting a reaction solution flowing out from a cooling module, and treating to obtain the 2-amino-5-chlorobenzophenone. The method is suitable for the large-scaleproduction of the 2-amino-5-chlorobenzophenone.

The invention discloses a method of synthesizing apixaban intermediate by a microchannel reactor and belongs to the technical field of synthesis of antithrombotic drugs. The method comprises: adding ethyl 4,5,6,7-tetrahydro-1-(4-benzyloxyphenyl)-6-(4-nitrophenyl)-7-oxo-1-H-pyrazolo[3,4-c]pyridine-3-carboxylate into an organic solvent, adding an activated carbon-loaded noble metal catalyst to obtain a mixture as material I, delivering the material I to a preheating module of the microchannel reactor, preheating, and feeding into a reaction module unit; delivering hydrogen to the reaction moduleunit of the microchannel reactor and the material I to the reaction module unit for the purpose of reaction, collecting reacted liquid from a cooling module, and post-treating to obtain the apixabanintermediate. The method can effectively shorten the reaction time and greatly reduce the safety potential hazard that hydrogen leakage causes combustion and explosion, and is applicable to the synthesis of apixaban intermediates.