45results about How to "Strong electrostatic attraction" patented technology

The invention provides a high-strength sand prevention casing pipe with high perpetration rate. The casing pipe comprises a pipe body suitable for being inserted into the periphery of well wall. The pipe body comprises aggregate particles, a resin film used for coating the surface of the aggregate particles and polythiol curing agent used for solidifying the resin film, wherein the resin film refers to epoxy modified organic silicon resin with an epoxy value of 0.23-0.56 eq/100g. A weight percentage of the resin film and the aggregate particles is 0.5-10: 100 and the weight percentage of the polythiol curing agent and the resin film is 15-20: 100. The casing pipe has the advantages of being high in strength, permeating oil effectively, preventing water effectively and being capable of being suitable for the sand prevention casing pipe of the periphery of the well wall.

The invention discloses a composite ionic adsorption material which is a spherical particle prepared by taking 80-85 parts of zeolitefine powder subjected to water bath modification by 0.8-1.0mol/L NaCl solution, 10-20 parts of medical stone fine powder, and 10-20 parts of kieselguhr fine powder as base materials, and 6 parts of activated carbon powder as a pore former and firing, wherein the diameter of the spherical particle is 2-12mm, and the pore volume of the spherical particle is 0.645-0.650 cm<3>/g. Activated zeolite is added to medical stone and kieselguhr to prepare the novel compound ionic material, and the zeolite, the medical stone and the kieselguhr jointly exert adsorption effects. The salt modified zeolite and medical stone increase an ionic exchange space and internal surface area, so that the adsorption capacity of the prepared composite adsorption material is further improved, and a better adsorption effect is achieved.

The invention discloses a chinaberry seed nursery stock insecticide fertilizer prepared from the following raw materials: by weight, 30-40 parts of rapeseed cake, 30-40 parts of soybean meal, 40-50 parts of pine needle powder, 50-60 parts of cassava dregs, 40-50 parts of peat, 50-60 parts of vermiculite, 20-30 parts of medical stone, 50-60 parts of urea, 20-25 parts of potassium bicarbonate, 10-12 parts of potassium chloride, 1-2 parts of sodium humate, 2-3 parts of manganese sulfate, 3-4 parts of zinc sulfate, 2-3 parts of ferrous sulfate, 1-2 parts of sodium selenite, 1-2 parts of stellera chamaejasme powder, 10-12 parts of chinaberry seed, 6-9 parts of an EM bacteria agent, 10-15 parts of a soil conditioner, and a right amount of water; The chinaberry seed nursery stock insecticide fertilizer uses the raw materials which are mostly natural substances, has the very good economic and environmental benefits, is rich in nutrition, and is capable of insect killing, sterilization, soil improvement and the like.

The invention discloses a preparation technology of hard charcoal, and relates to the technical field of agricultural resources and environments. The preparation technology of the hard charcoal comprises the steps of impregnation of a biomass raw material in a catalyst solution and three-stage pyrolysis charring, the first-stage pyrolysis charring is realized by rising the temperature to a low temperature at a low heating rate and carrying out pre-charring, and the second-stage pyrolysis charring and the third-stage pyrolysis charring are realized by rising the temperature to a high temperature and carrying out charring, so the yield of the hard charcoal is increased, the specific surface area of the hard charcoal is increased, the aperture structure of the hard charcoal is improved, and the practical values of the hard charcoal are greatly improved; and surface oxidation and oxygen insulation cooling are carried out after the pyrolysis charring to oxidize the surface of the charcoal, and oxygen isolation cooling is carried out to reach room temperature in order to obtain the hard charcoal, so the surface of the hard charcoal is off-white, convenient cleaning during transportation and use is realized, and contamination of clothes and hands is avoided.

Ion exchange and hydrophobic interaction chromatographic materials are constructed by tethering a terminal binding functionality to a solid support via a hydrophobic linker. The backbone of the linker typically comprises sulfur-containing moieties. Suitable terminal binding functionalities are tertiary amines, quaternary ammonium salts, or hydrophobic groups. These chromatographic materials possess both hydrophobic and ionic character under the conditions prescribed for their use. The separation of proteins from crude mixtures at physiological ionic strength can be accomplished with a chromatographic material of this type by applying pH or ionic strength gradients, thereby effecting protein adsorption and desorption.

The invention relates to a regeneration method for removing an oxygen compound containing adsorbent in low-carbon olefins, and mainly solves the problems that the operation is complicated; the regeneration efficiency is low; the adsorbent can be easily coked and generate carbon deposition, so that the adsorption performance of the adsorbent is reduced or even inactivated, and the like. The regeneration method has the technical scheme that stepped programmed temperature rising is performed at lower pressure and a temperature higher than the adsorption temperature; the adsorbent requiring regeneration contacts positive or reverse flowing high-temperature drying gas with heat. The problems are well solved; the regeneration method can be used for removing the oxygen compound containing adsorbent in industrial low-carbon olefins.

The invention discloses a medical stone sulfenyl repairing agent for treating soil mercury pollution and a preparation method thereof. The medical stone sulfenyl repairing agent is a composite repairing agent material obtained by modifying medical stone obtained after acid activation treatment through a sulfenyl-containing complex; the medical stone sulfenyl repairing agent is prepared from, by weight, 10-12 parts of medicine stone and 11-14 parts of a sulfenyl complex. The medical stone sulfenyl repairing agent has the advantages that the remarkable repairing effect on mercury polluted soil is achieved, the concentration of mercury in rice can be effectively lowered, the technological flow process is simple and reliable, the cost is low, use is safe, no secondary contamination is caused,the medical stone sulfenyl repairing agent is of a great actual and economic significance in mercury polluted soil repairing, and the repairing agent meets the national agricultural sustainable requirement.

The invention belongs to the technical field of nano material preparation, and particularly relates to a preparation method and applications of MOF-based hydroxylated magnetic nitrogen-doped carbon nanotubes. The preparation method comprises the following steps: directly calcining MOF in a tubular furnace, and carrying out hydroxylation modification on the material by using a chemical means to prepare the hydroxylated magnetic nitrogen-doped carbon nanotube material. According to the invention, the preparation process is simple; the water dispersibility of the obtained hydroxylated magnetic nitrogen-doped carbon nanomaterial is improved on the basis that the structure stability, the high magnetism and the large specific surface area are still kept under the existing strong acid and alkaliconditions; and a large number of uncoordinated hydroxyl groups enable the material to have good selectivity on a carboxyl-containing target object, and when the material is used for monitoring the content change of auxin in tea leaves under the stress of heavy metals in soil, analysis and understanding of the growth mechanism of plants under the stress of heavy metals in soil are facilitated.

The invention belongs to the electrochemical field, and particularly relates to preparation and detection methods for a chemically modified electrode for selectively measuring dopamine. The preparation comprises the following steps: preparing a multi-walled carbon nano-tube suspension, pre-treating a glassy carbon electrode, dripping and coating the prepared multi-walled carbon nano-tube suspension on the electrode, and drying for later use, soaking the electrode in 4-(2-pyridyl-azo) resorcinol solution, taking phosphate buffer as base solution, and carrying out cyclic scanning in a potential range from minus 0.8 to 2.2V to prepare the multi-walled carbon nano-tube-poly 4-(2-pyridyl-azo) resorcinol membrane modified electrode. The electrode is used for detecting the dopamine under the co-existence of ascorbic acid and uric acid, the result indicates that the electrode is capable of dividing the oxidation peak of ascorbic acid, dopamine and uric acid into three independent peaks with large distance, so that the interference of the co-existent ascorbic acid and uric acid on detection of the dopamine can be eliminated; the preparation and detection methods are high in sensitivity and good in reproducibility and stability.

The invention discloses a molecular sieve packaged core-shell catalyst (Figure 1) and a preparation method thereof, and relates to the field of catalyst preparation. According to the core-shell catalyst, an inner core is CuPt/SSZ-39, a shell is hierarchical pore Silicalite-1, the catalyst is prepared from CuPt/SSZ-39, a silicon source and a quaternary ammonium salt structure-directing agent through a hydrothermal synthesis method, and the inner core is prepared by dipping an SSZ-39 molecular sieve in a CuPt bimetallic precursor solution; the modified SSZ-39 molecular sieve is prepared by modifying an SSZ-39 molecular sieve with a silane coupling agent. The CuPt bimetallic nanoparticles in the catalyst prepared by the invention are anchored on the surface of the modified SSZ-39 molecular sieve and encapsulated in the shell of the hierarchical pore Silicalite-1 molecular sieve, so that the activity and sintering resistance of the catalyst are remarkably improved, and the catalyst can be applied to the fields of petrochemical engineering, fine chemical engineering and the like.

The invention discloses a preparation method of an antiviral total heat exchange fresh air film. The preparation method comprises the following steps: reacting halogenated hydrocarbon with an amino compound monomer to obtain polymerizable quaternary ammonium salt; carrying out copolymerization reaction on polymerizable quaternary ammonium salt and a small molecular monomer to obtain a quaternary ammonium salt polymer; dissolving a quaternary ammonium salt polymer and a high-moisture-permeability polymer in a solvent to obtain a coating solution, coating a porous base material with the coatingsolution, and drying to obtain the antiviral total heat exchange fresh air film. The antiviral total heat exchange fresh air film is prepared by blending a quaternary ammonium salt polymer and a high-moisture-penetrability polymer in a solvent and coating the mixture on a porous base material. The antiviral total-heat-exchange fresh air film has high sensible heat and latent heat exchange capacity, meanwhile, viruses in air can be captured and killed through high electrostatic attraction capacity, and the effects of sterilizing and purifying indoor air and outdoor air are achieved.

The invention discloses high-stability colloidal foam for inhibiting oxidation self-heating of a loose coal body and a preparation method of the high-stability colloidal foam. The high-stability colloidal foam is prepared from the following raw materials in percentage by weight: 58-80% of water, 19-40% of fly ash, 0.4-0.8% of an air entraining agent, 0.2-0.6% of a film coating agent and 0.2-0.6% of a cross-linking agent. The preparation method of the high-stability colloidal foam comprises the following steps: firstly, weighing the fly ash and the film coating agent in proportion, adding the fly ash and the film coating agent into water, and fully stirring to obtain a uniform fly ash suspension; adding the air entraining agent into the fly ash suspension in proportion, quickly stirring for 5-10 minutes, and preparing fly ash foam through an air entraining foaming expansion process; and finally, adding the cross-linking agent in proportion, and stirring for 3-5 minutes to obtain the high-stability colloidal foam. The high-stability colloidal foam disclosed by the invention is good in heat-resistant stability and excellent in flame retardant property, can keep moisture for a long time and wet a coal body, has a good wrapping and bonding effect on loose coal bodies such as residual coal in a mine goaf, fire coal in a coal field fire area and the like, and can form a layer of coating film on the surface of the coal body to isolate oxygen for a long time.

The invention discloses a PVC glove with an antibacterial function and a preparation method of the PVC glove. The PVC glove is prepared from the following raw materials in parts by weight: 100-150 parts of polyvinyl chloride paste resin, 65-100 parts of a plasticizer, 20-30 parts of a plasticizing aid, 20-40 parts of a viscosity reducer, 1-3 parts of a stabilizer, 0.3-0.9 part of a bacteriostaticagent and 0.2-0.5 part of a bacteriostatic aid. When the bacteriostatic aidand the plasticizing aid are blended,protons onacidic group and sulfonic acid groups on the plasticizing aid are moved tobasic group pyridyl groups on the bacteriostatic aid. Acid radical anions and cation groups with protons are formed; the strong electrostatic attraction effect between molecules is realized; the plasticizing aid and the bacteriostatic aid are compatible; the bacteriostatic aidis added into the PVC glove, so that the compatibility of the bacteriostatic aid and the PVC glove is improved, the bacteriostatic aidis prevented from being separated from the PVC glove, the bacteriostatic effect of the PVC glove is guaranteed, bacteriostatic aidmolecules cannot be greatly separated from aPVC glove body after long-time use, and the service life of the bacteriostatic PVC glove is prolonged.

The invention provides a flexible copper-clad plate graphene oxide hole metallization method. A flexible copper-clad plate with through holes is soaked in a graphene oxide aqueous solution and then is subjected to chemical copper plating. The hole wall generated by the hole metallization method is smooth, flat and flawless, and the problem of skip plating is avoided.

The invention relates to lubricating grease and a preparation method thereof. The lubricating grease is prepared from the following raw materials in parts by mass: 77-92 parts of base oil, 10.3-17.6 parts of a thickening agent and 5-8 parts of a polyoxometalate compound, wherein the base oil comprises bio-oil and synthetic oil, and the polyoxometalate compound has a nucleophilic group and an electrophilic group. Through the synergistic effect of the base oil and the polyoxometalate compound, the lubricating grease has better adsorbability to micron-sized steel scraps.

The invention discloses a low and high voltage combined electrochemical water treatment device and method and relates to the technical field of water treatment. The low and high voltage combined electrochemical water treatment device comprises a low-voltage electrochemical water treatment device and an electrostatic water treating unit, wherein the inlet of the low-voltage electrochemical water treatment device is communicated with a main water inlet pipe; the low-voltage electrochemical water treatment device is connected with an automatic cleaning mechanism and the electrostatic water treating unit; the low-voltage electrochemical water treatment device is in a plug flow structure. The low and high voltage combined electrochemical water treatment device combines the electrostatic water treating unit with the plug flow type low-voltage electrochemical water treatment device, thereby being capable of firmly complexing ions flowing out of a low-voltage electric field, solving the deficiency of the low-voltage electric field and increasing the scale preventing rate to higher than 98% without increasing the energy consumption too much. The low and high voltage combined electrochemicalwater treatment device is large in water treatment volume, wider in treated hardness and concentration ranges compared with the prior art, and applicable to treating both medium or low-hardness waterand medium or high-hardness water. The low and high voltage combined electrochemical water treatment device achieves semi-automatic cleaning and maintenance, is simple, labor-saving, rapid and pollution-free in operation and reduces the invested cost by one third compared with the prior art.