46results about How to "Improve hydrophilicity and hydrophobicity" patented technology

The invention relates to a macromolecule separation microporous membrane and a preparation method thereof, in particular to a preparation method of modified fiber powder / polymer mixed microporous membrane. The method provided by the invention includes the following steps: the surface of the fiber powder is cleaned and carved; the surface-carved fiber powders, polymer, various additives and solutions are combined to prepare membrane casting liquid, and then the membrane casting liquid is put onto a glass plate for membrane-shaving or spanning and then the liquid membrane is gelatinized into membrane in the coagulation bath process, and finally the membrane is dipped in membrane-dipping liquid and then is dried. The invention can prepare the polymer microporous membrane which has low cost, high strength and better capability through adding various fiber powders into the membrane preparation liquid and changing process conditions.

The invention discloses a polyester composite fiber with an intelligent surface, and a preparation method and application thereof. The polyester composite fiber comprises a polyester fiber matrix andparticles covering the polyester fiber matrix, wherein the particles and the polyester fiber matrix are chemically bonded; preferably, the particles are polymer particles; more preferably, the particles are polymer particles with environmental response; thus, covering of the surface of the polyester fiber matrix with the particles can improve the hydrophilicity and hydrophobicity of the fiber andendows the fiber with certain environmental response. The preparation method comprises the following steps: preparing the polyester fiber matrix having reactive groups on the surface at first; then preparing the particles having reactive functional groups; and finally, mixing the polyester fiber matrix and the particles for a reaction so as to obtain the polyester composite fiber. The polyester composite fiber of the invention can be used for smart textiles, non-woven fabrics, porous films, composite materials and oil-water separators, preferably for smart textiles and oil-water separators.

The invention relates to the technical field of slow release fertilizer, in particular to a rice-dedicated slow release fertilizer and a preparation method thereof. Raw materials include organic fertilizer, monopotassium phosphate, sulfate, urea and medical stone powder and can also include chitosan sodium glycero-phosphate temperature-sensitive gel. The rice-dedicated slow release fertilizer is comprehensive and balanced in nutrition; through reasonable arrangement of a coating structure, nutrient release is matched with rice required fertilizer, and therefore the nutrient resource utilization rate is raised; physiological disease resistance of rice is enhanced, the lodging-resistance capability is enhanced, the demand of rice in the maximum absorption period can be met, therefore, the yield of rice is increased, and the quality of rice is improved.

The invention discloses a cerebral cancer suppressing phycocyanin-polylactic acid-adriamycin micelle. Phycocyanin and PLA-PEG-PLA are utilized as raw materials, and a phycocyanin-polylactic acid no-load micelle is formed according to addition reaction of carboxyl and self-assembly principle based on hydrophilia and hydrophobicity. According to the self-assembly principle, adriamycin is coated in the no-load micelle to assemble by itself to form the micelle. The phycocyanin-polylactic acid-adriamycin micelle is a novel nano medicine capable of directly acting on tumor through blood-brain barrier to suppress cerebral cancer cells and capable of releasing slowly to retain in blood for a long time, thereby overcoming influence and limit of the blood-brain barrier to drug treatment effect. Besides, the micelle is prepared from natural or degradable components which are not involved with organic solvents during synthesis, has the advantages such as good biocompatibility, biodegradability, hypotoxicity, high loading capacity, and accordingly has high application potential in treating cerebral cancer.

The invention relates to a preparation method of a nanometer porous carbon material. The preparation method comprises the following steps: dissolving a template agent in a water solution, and uniformly stirring, thus obtaining a template agent water solution; adding phloroglucin and melamine into the template agent water solution, adding formaldehyde after completely dissolving, then adding a sodium bicarbonate solution, and uniformly stirring, thus forming sol; sealing and putting the sol in a baking oven for carrying out thermal treatment, thus forming gel; cooling to room temperature, thusobtaining organic wet gel; repeatedly washing the organic wet gel in a deionized water solution of sorbitan oleate, and then drying at normal pressure, thus obtaining an organic dry gel block. The nanometer porous carbon material prepared by the preparation method has the characteristics of adjustable density, low cost, high specific surface area and the like, and plays a critical role in the field of electrochemistry.

The invention discloses a preparation method of a vertical orientation magnetic nanosheet/sodium alginate composite membrane. By means of the magnetic field responsiveness of a magnetic nanosheet, a vertical orientation structure is formed in a magnetic field so as to prepare a high-performance pervaporation composite membrane; wherein the magnetic nanosheets comprise nanosheets with intrinsic magnetic responsiveness or other nanosheets which generate magnetic responsiveness by loading magnetic response particles. The preparation method specifically comprises the following steps: uniformly dispersing magnetic nanosheets, physically blending the dispersion with sodium alginate to form a membrane casting solution, carrying out standing treatment for defoaming, spin-coating the membrane casting solution on a polyacrylonitrile ultrafiltration membrane, drying the composite membrane in a magnetic field at room temperature, and carrying out crosslinking treatment to obtain the magnetic nanosheet/sodium alginate composite membrane with vertical orientation. The preparation method is simple and controllable, and the raw materials are cheap and easily available. The composite membrane is suitable for pervaporation ethanol dehydration, has high permeation flux and high selectivity to water molecules, and has good operation stability at high temperature.

The invention discloses a preparation method of a printable high-strength body temperature release drug hydrogel. The preparation method comprises the following steps: preparing chemically crosslinkedPNaAMPS hydrogel, grinding the chemically crosslinked PNaAMPS hydrogel into powder, adding the PNaAMPS powder into a solution containing NIPAM, AAm monomers, an initiator and a crosslinking agent, directly pouring the solution into a glass mold, and carrying out polymerization molding under the illumination of ultraviolet light. The obtained hydrogel has a unique double-network structure, excellent mechanical strength, good toughness and good environmental responsiveness, and can efficiently load and release small molecular drugs in a body temperature environment to achieve an antibacterial effect. The preparation process is simple and easy to implement, the product performance is excellent, and the hydrogel has wide application prospects in the fields of bioengineering, drug controlled release, and the like.

The invention discloses a circulating cooling system preparation method based on a nanometer limited water pressure thermal effect, and the method comprises the steps: firstly enabling an electronic chip needing to be cooled to be integrated on a silicon wafer, and enabling the silicon wafer to be provided with a groove; depositing a limited layer in the groove; secondly, preparing a rigid nano-pillar array on the surface of the silicon wafer, and enabling the nano-pillar array to be located in the groove of the silicon wafer and to be in contact with the limited layer; casting an epoxy resin film in the groove, cooling, separating the silicon wafer and the silicon wafer, and filling the obtained nano micropore array with a liquid refrigerant through vapor pressure; and finally, depositing a piezoelectric film on the silicon wafer. The piezoelectric film drives the nano-columns to move, so that pressurization and decompression of the refrigerating medium are achieved, water limited in the nano-micropores is induced to generate phase change, and then refrigeration is achieved. The refrigerating system has the advantages of large adiabatic temperature change, wide working temperature range, clean and pollution-free refrigerating medium and the like.

The invention relates to the technical field of fertilizer processing, in particular to a preparation method of an elemental sulfur based ammonium phosphate slow release fertilizer. The preparation method comprises the following steps of preparation of sulfur sol, mixing, pelleting, coating and cleaning. The preparation method provided by the invention is simple in technology and safe to operate;a prepared coated elemental sulfur based ammonium phosphate product well controls the release rate of nitrogen, phosphorus and sulfur, realizes long-acting release of nutrient elements; and in addition, the contained sulfur and silicon components can promote absorption of other nutrient elements and improve the stress resistance growth of crops.

The invention discloses polyamide composite fibers with intelligent surfaces and a preparation method and application of the polyamide composite fibers. The polyamide composite fibers comprise a polyamide fiber matrix and particles which cover the polyamide fiber matrix, so that the roughness of the fibers can be improved by covering the surface of the fiber matrix with the particles, the hydrophobicity of the fibers is further improved, and the condition of poor dimensional stability caused by strong hygroscopicity of the polyamide fibers is improved. The preparation is carried out as follows: firstly, obtaining a polyamide fiber matrix with reactive groups on the surface; secondly, obtaining particles with reactive functional groups; and finally, mixing and reacting the polyamide fiber matrix and the particles to obtain the polyamide composite fibers. The polyamide composite fibers can be used for intelligent textiles, non-woven fabrics, porous films, composite materials and oil-water separators, and is preferably used for intelligent textiles and oil-water separators.

The invention discloses a polyolefin composite material with an intelligent surface, and a preparation method and application thereof. The polyolefin composite material comprises a polyolefin matrix and particles covering the polyolefin matrix, wherein the particles and the polyolefin matrix are chemically bonded; preferably, the particles are polymer particles; more preferably, the particles arepolymer particles with environmental response; thus, covering of the surface of the polyolefin matrix with the particles can improve the hydrophilicity and hydrophobicity of the material and endows the material with certain environmental response. The preparation method comprises the following steps: preparing the polyolefin matrix having reactive groups on the surface at first; then preparing theparticles having reactive functional groups; and finally, mixing the polyolefin matrix and the particles for a reaction so as to obtain the polyolefin composite material. The polyolefin composite material of the invention can be used for smart textiles, non-woven fabrics, porous films, waterproof gas-permeable membranes, battery diaphragms, composite materials, and switch films.

The invention discloses a composite fiber with an intelligent surface and a preparation method and application of the composite fiber. The composite fiber comprises a fiber matrix and conductive particles covering the fiber matrix, and the surface of the fiber matrix covered with the conductive particles can improve the specific conductance of the fiber and further improve the electrical conductivity of the fiber. The preparation method comprises the following steps: firstly obtaining a fiber matrix with reactive groups on the surface, then obtaining conductive particles with reactive functional groups, and finally mixing the fiber matrix with the conductive particles for reaction to obtain the composite fiber. The composite fiber can be used for conductive fibers, antistatic fibers or fabrics, electronic circuits, sensors, smart textiles and the like, and is preferably used for conductive fibers and sensing and antistatic fiber fabrics.

The invention discloses a gas diffusion layer structure of an electrochemical oxygenerator membrane electrode and a preparation method, the gas diffusion layer structure comprises a cathode gas diffusion layer and an anode gas diffusion layer, the cathode gas diffusion layer comprises a cathode conductive porous substrate layer and a cathode microporous layer arranged at the inner side of the cathode conductive porous substrate layer; the anode gas diffusion layer comprises an anode conductive porous substrate layer and an anode microporous layer arranged on the inner side of the anode conductive porous substrate layer, the anode microporous layer comprises carbon particles and a binder, and the cathode microporous layer comprises carbon particles, a binder, a water absorbent and an adsorption material. Compared with the prior art, the electrochemical oxygen generator has the advantages that the conductivity is good, the hydrophilic and hydrophobic properties of the cathode gas diffusion layer and the anode gas diffusion layer are different, the gas diffusion performance and the water management performance of the electrochemical oxygen generator are improved, the water-gas distribution performance of the cathode gas diffusion layer and the anode gas diffusion layer is optimized, the electrolysis rate of the anode side water is further improved, and the electrochemical oxygen generator is more stable. And oxygen can be stably produced under the condition of low humidity.

The invention discloses a preparation method of a sewage treatment agent and application of the sewage treatment agent in ozonized water treatment, and belongs to the technical field of sewage treatment materials. The method comprises the steps: adding the dispersion liquid 2 in the step 2 into the dispersion liquid 1 in the step 1, continuously stirring to obtain a dispersion liquid 3, and adjusting the pH value of the dispersion liquid 3 to 9-11 through a sodium hydroxide solution to obtain a dispersion liquid 4; transferring the dispersion liquid 4 in the step 3 into a polytetrafluoroethylene-lined stainless steel high-pressure reaction kettle for hydrothermal reaction; after the reaction is finished, cooling to room temperature, absorbing the supernate, and repeatedly washing with deionized water and ethanol pentahydrate for a plurality of times; after standing and layering, sucking away supernatant liquid containing unreacted impurities again; and freeze-drying the Co3O4/GO compound with low water content in the lower layer to finally obtain the sewage treatment agent. The cobaltosic oxide composite aerogel with different hydrophilicity and hydrophobicity is synthesized by adopting a simple method, and the cobaltosic oxide composite aerogel shows excellent performance on ozonization degradation of hydrophilic/lipophilic pollutants.

The invention provides an anti-condensation method in a dry carbide slag recycling process. The method comprises the following steps of adding a dehumidizer in an impurity removal process in the dry carbide slag recycling process, and mixing dry carbide slag and the dehumidizer, wherein the content of particles with the particle diameter smaller than 50 microns in the dehumidifier is greater than or equal to 80wt%, and the content of particles with the particle diameter smaller than 20 microns in the dehumidifier is larger than or equal to 40wt%. According to the method, the moisture absorption condensation performance of the dry carbide slag is avoided, the resource short-distance utilization technology of the dry carbide slag is optimized, the risks of bag pasting and corrosion of the surface of a bag type dust collector are reduced, the equipment maintenance frequency is reduced, the method is simple in process, product performance is not affected, the difficulty in the dry carbide slag recycling process is effectively solved, and good economic and social value is achieved.

The invention discloses a drying agent with a heavy metal removal function and a preparation method thereof. The preparation method comprises the following steps: 1, preparing bentonite filtered powder; 2, uniformly mixing the bentonite filtered powder, silicon dioxide nano powder and plant starch, adding water, and preparing a suspension; 3, adding an organic modifier and an auxiliary modifier into the suspension, adjusting the pH with a sodium hydroxide solution and then heating to prepare modifiedbentonite; 4, soaking the modified bentonite in a hydrochloric acid solution, washing the modified bentonite to be neutral with deionized water, granulating, and drying to obtain the spherical drying agent with the particle size of 1-3 mm. The prepared drying agent has a good adsorption effect on heavy metal ions, especially for heavy metal ions such as copper, chromium, nickel, lead, iron and zinc, the lead ion adsorption rate can reach 75% or above, and the chromium ion adsorption rate can reach 80% or above.

The invention discloses an electrolytic manganese slag source decrement method. The method is characterized by comprising the following steps that ore slurry is prepared according to a certain solid-liquid ratio of rhodochrosite powder, the ore slurry is fed into a reactor, the proper reaction temperature and the mineral acid ratio are controlled, and after the ore slurry is stirred and mixed, a surfactant with a certain concentration range is added, the pH of the ore slurry is adjusted by adopting an alkaline agent after the reaction is finished, and solid-liquid separation is performed. Compared with a traditional non-surfactant process, the manganese leaching rate is increased by 7-14%, and the water content of manganese slag is reduced by 2-5%. According to the method, by adding the surfactant, the manganese slag particle size in the manganese ore leaching process can be regulated and controlled, the dispersion of manganese slag particles is strengthened, the utilization rate of manganese ore resources is improved, and valuable resources and pollutants entrained in the manganese slag are reduced. Compared with the prior art, the method has the advantages of being simple in process, low in cost and high in operability.