33results about How to "Achieve reversible conversion" patented technology

The invention discloses an intelligent surface construction method capable of achieving wettability conversion. Liquid rubber and magnetic microparticles are mixed in a certain ratio, and then coat asubstrate, and an anti-adhesion plate is fixed at a certain distance above the substrate. A vertical upward magnetic field is applied to the whole device from the bottom of the substrate, a mushroom column array structure is formed by liquid rubber self-assemble, after solidification molding, a microcolumn array is modified by fluorosilane to obtain an intelligence surface capable of achieving wettability conversion relying on microstructure control. By induction of the external magnetic field, the mushroom-like column array structure of the surface can be bent and deformed to lead reversibleconversion between a low-adhesion super-hydrophobic and oileophobic state and a high-adhesion hydrophobic oleophobic state of the wet state of water and oil on the surface. The preparation method hasthe advantages of simple process, no complicated equipment, and no template assistance, and is advantageous for large-scale manufacturing and practical application of the intelligence surface capableof achieving wettability conversion.

Belonging to the field of nano-material synthesis, the invention discloses a preparation method of a nano-zinc oxide cellulose sponge material. The method includes: adopting hemp stem fiber as the raw material, using a NaOH solution to swell the fiber, then using saturated steam pressurization to split cellulose into smaller fibers, then reacting N, N'-carbonyldiimidazole with cellulose to generate high activity cellulose, adding a KH-550 silane coupling agent to graft nano-zinc oxide to a high activity cellulose surface, then using absorbent cotton as the reinforcing fiber, taking sodium sulfate as the pore-forming agent, and using a NaOH / thiourea solution as the solvent, and carrying out die molding to prepare a nano-zinc oxide cellulose sponge material under low temperature and dry conditions. The obtained nano-zinc oxide cellulose sponge material has a sponge porous structure, the cellulose composing the sponge structure is easily degradable and does not cause secondary pollution, also the complex nano-zinc oxide bulge structure on the surface can realize reversible conversion of surface super-hydrophobicity and super-hydrophilicity, thus realizing adsorption and removal of oil.

The present invention discloses an aggregation luminescence enhancement ammonia sensitive metal-organic gel compound soft material and a preparation method thereof. According to the invention, the gel compound soft material is prepared from newly-synthesized 4, 4 '-oxybis-N '-(2-hydroxy benzoyl) benzoyl hydrazine as a ligand and zinc acetate hydrate in the presence of a polar organic solvent at room temperature, and the gel mass fraction is about 1.3 wt % (solute / solvent* 100%). The gel material has a significant aggregation luminescence enhancement effect and ammonia gas sensitive luminescence response function, also has the functions of selective adsorption of dyes and in-situ preparation of nano gold particles and the like. The preparation method is simple and easy to operate, the raw material price is moderate, and the production cost is low.

The invention provides a preparation method of an intelligent type oil-water separation material. Specifically, the intelligent type oil-water separation material which can conveniently and rapidly realize reversible conversion between different super-hydrophobic / super-oleophylic and super-hydrophilic / underwater super-oleophobic wet states is prepared by taking biomass loofah sponge as a raw material through proper treatment; the material can be used as an adsorption type oil-water separation material and can also be used as a filtering type oil-water separation material. According to the preparation method provided by the invention, a natural three-dimensional net-shaped porous structure of the biomass loofah sponge is ingeniously utilized and the biomass loofah sponge is used as the rawmaterial and is cheap and easy to obtain; the prepared oil-water separation material has a good separation effect on an oil-water mixture, can be repeatedly used for many times, has intelligent characteristics and can flexibly meet different oil-water separation requirements.

The invention provides a preparation method of super-molecule metal gel and belongs to the field of functional materials. The super-molecule metal gel is obtained by a complex formed by complexing a benzimidazole carboxylic acid derivative as well as metallic lead, cadmium, copper and zinc in H2O / CH3OH, H2O / DMSO, H2O / CH3CN, H2O / CHC13 or H2O / DMF systems under the ultrasonic condition. FT-IR spectrum and X-ray diffraction results show that the gel prepared according to the invention is formed by constraining solvent micromolecules through the coordination complex formed by the benzimidazole carboxylic acid derivative and the metallic ions; and as the gel shows the conversion nature of reversible gel-sol under the acid-base control, the gel can be used for making a controllable molecular switch.

The invention discloses a magnesium base alloy modulated thin film and a preparation method and application thereof. The magnesium base alloy modulated thin film comprises a magnesium base alloy modulated layer, a catalyst layer and a polymer layer which are sequentially arranged; and elemental composition of the magnesium base alloy modulated layer is MgxM1-x, wherein x is greater than 0.5 and less than 1, and M is at least one of Gd, Ti, Ni, Mn, Fe, Co, Y, Nb, Ru, Zr, Ca, Ba, La, and Sm. The magnesium base alloy modulated thin film has the advantages of simple preparation process, low cost,wider practicality range and the like, a hydrogen sensor made of the magnesium base alloy modulated thin film is high in response speed and high in sensitivity, is not required to be warmed and forced, potential safety hazards do not exist, and recycling further can be achieved. In addition, the thin film optical performance change further can be realized by adjusting technological parameters, a hydrogen induced discoloration thin film with a larger optical conversion interval is obtained, and the magnesium base alloy modulated thin film has larger application value in other fields as well.

The invention discloses anti-cracking recycled concrete and a preparation method thereof. During use of the concrete, if cracks appear on the surface of the concrete, polyurethane polymer cross-linkednanotubes in modified nanotubes are broken, disulfide bonds and hot hydrogen bonds can be matched with each other through high temperature of the environment, and self-repairing of the cracks is achieved; meanwhile, under the status, the high temperature enables the form of the nanotube with temperature responsiveness to be changed into a vesicle shape and the volume to be shrunk, so that component movement occurs in the concrete, the vesicle shape is recovered into the nanotube form after the temperature is reduced, and the nanotube can be connected with the nanotube with non-temperature responsiveness again to cooperate with the polyurethane polymer cross-linked nanotube to jointly carry out self-repairing of cracks. The invention discloses the anti-cracking recycled concrete and a preparation method thereof, wherein the anti-cracking recycled concrete is reasonable in process design and proper in component proportion, and the prepared concrete not only has excellent mechanical properties and anti-cracking performance, but also can self-repair cracks.

The invention discloses a circular polarization luminescent material with intelligent response multicolor conversion and a preparation method thereof. The intelligent response multicolor conversion circular polarization luminescent material has a structure shown as a formula I, cholesterol chiral groups are introduced into the structure, molecules are self-assembled to form spirally stacked nanotubes, yellow circular polarization luminescence is shown, and the asymmetry factor |g<lum>| is as high as 0.016. The fluorescence color and the circular polarization intensity of the circular polarization luminescent material have intelligent responsiveness to various external stimuli, including external force, temperature, illumination and organic solvent stimuli, and the circular polarization luminescent material is sensitive in response, high in contrast ratio and good in reversibility. The preparation method of the intelligent response multicolor conversion circular polarization luminescentmaterial is simple and efficient, and can be applied to the fields of force-induced discoloration, thermochromism, photochromism, steam-induced discoloration and other sensing materials, optical storage and display, anti-counterfeiting, circular polarization luminescent materials and the like.

The invention discloses building coating and a preparation process thereof. The building coating comprises the following components in percentage by weight: 60%-80% of water-soluble urea formaldehyde resin, titanium dioxide and water, 5%-8% of polyvinyl alcohol, 2%-8% of ethylene glycol, 2%-5% of plasticizer, 1%-3% of emulsifier, 1%-6% of water repellent agent, 6% of dimethyl phthalate, 11% of triphenyl methane crylactone and 2% of vanadium oxide. The preparation process of the building coating comprises the following steps of: mixing the water-soluble urea formaldehyde resin, the titanium dioxide, the water, the polyvinyl alcohol, the ethylene glycol, the plasticizer, the emulsifier, the dimethyl phthalate, the triphenyl methane crylactone and the vanadium oxide in proportion; stirring and heating up the mixture to 95 DEG C, grinding the mixture for 45 minutes at the grinding speed of 500 revolutions / minute; cooling the mixture to 50 DEG C, adding the water repellent agent in the proportion for stirring and reacting for 20 minutes to obtain the finished product. The building coating has the following advantages of realizing reversible conversion between heat absorption in winter and heat insulation in summer, relieving the environmental pollution and the greenhouse effect, being high in water resistance effect and high in anti-pollution effect.

The invention relates to movement equipment with a work-medium-loss-free-type thruster in order to overcome the defects in the prior art and particularly relates to equipment suitable for relying on thrust to complete movement. Current aviation and aerospace flying equipment is restrained by the reductant and oxidant carrying quantities; and human beings are limited and cannot achieve long journeysimilar to the interplanetary crossing grade. The movement equipment with the work-medium-loss-free-type thruster is characterized in that the process connected in sequence through work media and photons for controllable operation to generate thruster thrusting force is put forward; and according to the equipment with the thruster, when the thrusting force is generated, the work media are discharged outwards, the total quantity is balanced by capturing work media in the movement space, and a large quantity of hydrogen oxygen propellants are not relied on to be carried to serve as a unique power source of movement.

The invention discloses a making method of building paint, which comprises the following steps: adopting 7% methyl ester phthalate, 12% triarylmethane lactone, 3% vanadium oxide and 78% water-soluble urea-formaldehyde resin, titanium dioxide and water with the rate of water-soluble urea-formaldehyde resin, titanium dioxide and water at 10%: 50%: 40%; blending the materials evenly; grinding 30min at 500r / min; obtaining the product.

The invention discloses a colored electronic ink material based on bistable photonic crystals. The photonic crystal colored electronic ink material is mainly composed of nano colloidal particles with charges on the surface, an electrophoresis dispersion liquid and a polymer additive. Colloidal crystals are formed by spontaneous precipitation of the colloidal particles, so that first steady-state display of ordered arrangement of the colloidal particles and structural color can be realized. The viscous resistance of movement of the colloidal particles is increased by introducing a polymer into a dispersion medium, and the stronger coulomb repulsive interaction among the colloidal particles after lattice collapse is balanced, so that colorless and transparent second steady-state display under disordered accumulation of the colloidal particles is realized. The two kinds of steady state display do not need to be maintained by external voltage, rapid reversible conversion can be achieved by applying short forward voltage and backward voltage, and the method is suitable for developing the electronic ink display technology based on the photonic crystal.

The invention relates to a tertiary amine structure-containing polyarylene sulfide ultrafiltration membrane, a tertiary amine structure-containing polyarylene sulfide nanofiltration membrane and a preparation method thereof, and belongs to the field of high polymer materials. The invention provides a polyarylene sulfide separation membrane. The polyarylene sulfide separation membrane is a tertiaryamine-containing polyarylene sulfide ultrafiltration membrane prepared from tertiary amine-containing polyarylene sulfide resin. The invention provides a novel ultrafiltration separation membrane. The obtained ultrafiltration membrane can be converted into a nanofiltration membrane through acidification treatment, and the obtained nanofiltration membrane can be recovered into an ultrafiltration membrane through deacidification treatment, so that reversible conversion of ultrafiltration-nanofiltration is realized.

The invention discloses preparation and application of multi-wavelength regulated and controlled optical switch fluorescent polymer nanoparticles. Methyl methacrylate (MMA), green optical switch fluorochrome (SP-PDI) and a photochromic compound diaryl ethylene (DTE-BA) are taken as main raw materials by a fluorescence resonance energy transfer principle (FRET) to prepare the multi-wavelength regulated and controlled optical switch fluorescent polymer nanoparticles by using a miniemulsion polymerization method. The nano particles are small in particle size and good in water dispersibility, andcan show the characteristics of rapid and reversible fluorescence switch under the irradiation of two kinds of ultraviolet light and visible light. Compared with an existing optical switch fluorescentpolymer nanoparticles, the obtained optical switch fluorescent polymer nanoparticles have the advantages of multi-layer optical switch capability, low investment cost, simple synthesis route and thelike, are suitable for amplification synthesis and practical production application, and have great application prospects in the technical fields of logic gates, display materials and the like.

The invention provides an electrochromic nonmetallic salt electrolyte composite material, a preparation method and application, and belongs to the field of electrochromic electrolyte material synthesis. The method comprises the following steps: preparing tungsten oxide sol; then preparing amino or substituted amino modified carbon nanodots; and mixing the amino or substituted amino modified carbonnanodots with tungsten oxide sol, and adding a stabilizer to obtain the electrochromic nonmetallic salt electrolyte composite material. The invention also provides the electrochromic nonmetallic saltelectrolyte composite material obtained by the preparation method. The invention also provides an application of the electrochromic nonmetal salt electrolyte composite material in an electrochromic device. The electrochromic device provided by the invention can realize reversible conversion between yellow and green, and enriches the color types of inorganic electrochromic materials.

The invention discloses a palladium / magnesium-titanium dioxide gas-induced light-adjusting film and preparation thereof. The film comprises a magnesium-titanium dioxide composite film layer and a palladium catalyst layer which are successively arranged on a substrate. The preparation method comprises the following steps: growing the magnesium-titanium dioxide composite film layer on the substrate by a direct current magnetron sputtering method; and then growing the palladium catalyst layer on the film layer by a radiofrequency magnetron sputtering method. By a catalytic effect of a palladium film, hydrogen is decomposed into hydrogen atoms which are combined to a magnesium matrix to generate hydride, titanium dioxide is added to reduce the degree of crystallinity of magnesium, diffusion of the magnesium matrix to the palladium film is reduced, heating and pressurizing are not required, and reversible transformation of the film between a reflection state and a transparent state can be realized at room temperature. The light-adjusting film is low in cost, simple in process, short in response and recovery time and good in durability, and has important application prospect in the field of intelligent glass.

The invention provides a nano magnetic particle hydrophilic and hydrophobic intelligent tube and a control system thereof, the inner surface of a base tube is divided into a spacer region and an intelligent surface region along the circumferential direction, the intelligent surface region is filled with nano magnetic particles, and the nano magnetic particles are controlled by magnetic induction lines penetrating through an interpolation net. The magnetic induction lines are connected with different channels of a multi-channel direct-current power source, the multi-channel direct-current power source is connected with a computer, the computer adjusts current of all the channels of the multi-channel direct-current power source, the computer receives temperature feedback of thermocouples welded to the upper end and the lower end of the outer surface of the base tube, and then the current applied to the magnetic induction lines is changed. The intensity of a magnetic field is changed by controlling the intensity of current, the contact mode of nano magnetic particles and liquid drops is changed, hydrophilic and hydrophobic reversible transformation is achieved, and the surface wettability is adjusted. In the heat exchange process of the intelligent pipe, the wettability of the inner surface of the pipe is converted according to different flow patterns, the distribution of phases in the pipe is regulated and controlled, the multiphase flow structure and heat transfer cooperation is achieved, and the heat transfer effect is improved.

The invention discloses a magnesium base alloy modulated thin film and a preparation method and application thereof. The magnesium base alloy modulated thin film comprises a magnesium base alloy modulated layer, a catalyst layer and a polymer layer which are sequentially arranged; and elemental composition of the magnesium base alloy modulated layer is MgxM1-x, wherein x is greater than 0.5 and less than 1, and M is at least one of Gd, Ti, Ni, Mn, Fe, Co, Y, Nb, Ru, Zr, Ca, Ba, La, and Sm. The magnesium base alloy modulated thin film has the advantages of simple preparation process, low cost,wider practicality range and the like, a hydrogen sensor made of the magnesium base alloy modulated thin film is high in response speed and high in sensitivity, is not required to be warmed and forced, potential safety hazards do not exist, and recycling further can be achieved. In addition, the thin film optical performance change further can be realized by adjusting technological parameters, a hydrogen induced discoloration thin film with a larger optical conversion interval is obtained, and the magnesium base alloy modulated thin film has larger application value in other fields as well.

The invention discloses the preparation and application of multi-wavelength regulated optical switch fluorescent polymer nanoparticles. Utilizing the principle of fluorescence resonance energy transfer (FRET), methyl methacrylate (MMA) and green optical switch fluorescent dye (SP‑PDI ) and photochromic compound diarylethene (DTE‑BA) as the main raw materials, a multi-wavelength-tunable photoswitchable fluorescent polymer nanoparticle was prepared by miniemulsion polymerization. The nanoparticle has small particle size and good water dispersibility, and can exhibit fast and reversible fluorescence switching characteristics under the irradiation of two kinds of ultraviolet light and visible light. Compared with the existing optical switch fluorescent polymer nanoparticles, the optical switch fluorescent polymer nanoparticles obtained in the present invention have the advantages of multi-level optical switch capability, low input cost, simple synthesis route, etc., and are suitable for scale-up synthesis and actual production It has great application prospects in technical fields such as logic gates and display materials.

The invention relates to a polyarylene sulfide ultrafiltration membrane containing a tertiary amine structure, a polyarylene sulfide nanofiltration membrane containing a tertiary amine structure and a preparation method thereof, belonging to the field of polymer materials. The invention provides a polyarylene sulfide separation membrane. The polyarylene sulfide separation membrane is a tertiary amine-containing polyarylene sulfide ultrafiltration membrane prepared from a tertiary amine-containing polyarylene sulfide resin. The invention provides a novel ultrafiltration separation membrane. The obtained ultrafiltration membrane can be transformed into a nanofiltration membrane through acidification treatment; the obtained nanofiltration membrane can be restored to an ultrafiltration membrane through deacidification treatment, thereby realizing ultrafiltration-nanofiltration Filter reversible conversion.

The invention discloses a preparation method and application of a photoswitch spiropyran-perylene imide compound. By means of the method, the symmetric or asymmetric substituted spiropyran-perylene imide compound is synthesized and introduced into a polymer nanoparticle system through a one-step fine emulsion polymerization method to prepare a photoswitch fluorescent polymer nanoparticle. The nanoparticle can show fluorescent switching performance with high response speed under the irradiation of ultraviolet light and visible light in a solution state or a solid film state. Compared with existing photoswitch fluorescent polymer nanoparticles, the obtained photoswitch fluorescent polymer nanoparticle has the advantages that through connection to an acceptor group in the form of covalent bonds, the usage quantity of acceptors is reduced, the investment cost is low, and the synthesis route is simple. The compound is suitable for amplification synthesis and practical production applicationand has a great application prospect in the technical fields of display materials and the like.

The invention discloses a Si-Sb-Se phase transition film material used for a phase transition storage and the ingredient thereof is SicSbaSeb, wherein b is equal to or more than 48 and equal to or less than 60, a is equal to or more than 20 and equal to or less than 40, c is equal to or more than 8 and equal to or less than 40, and a plus b plus c is 100; or b is equal to or more than 60 and equal to or less than 80, a is equal to or more than 20 and equal to or less than 40, c is equal to or more than 3 and equal to or less than 20 and a plus b plus c is 100. Compared with the prior art, theSi-Sb-Se phase transition film material has faster crystallization rate, faster read-write rate and better data holding property than the commonly used Ge2Sb2Te5 material and better thermal stabilitythan SbSe binary material. Meanwhile, the material is free from element Te, thereby being environment friendly, and the material has good compatibility with the CMOS technique.

The invention provides a hydrophilic and hydrophobic conversion intelligent surface heat exchange tube and a control system thereof, the inner surface of a base tube is divided into a spacer region and an intelligent surface region in the circumferential direction, an insulating layer I, a conductive layer, a porous layer and an insulating layer II are sequentially constructed in the intelligent surface region from the inner wall of the tube, and finally hydrophobic groups are electrified and sprayed on the insulating layer II. The exterior of the base tube is divided into a plurality of sections at equal intervals, thermocouples are welded to the upper end and the lower end of each section to monitor the temperatures of the upper end and the lower end of the section, the temperatures are fed back to a computer, and the computer adjusts currents of all the channels of the multi-channel direct-current power source to enable charged hydrophobic groups to move. And the inner surface of the pipe is subjected to hydrophilic-hydrophobic conversion in a spatio-temporal level. In the heat exchange process of the heat exchange tube, wettability transformation of the inner surface of the tube can be achieved according to different flow patterns, phase distribution in the tube is regulated and controlled, a multiphase flow structure and heat transfer are coordinated, and the heat transfer effect is improved.

The invention discloses the preparation and application of multi-wavelength regulated optical switch fluorescent polymer nanoparticles. Using the principle of fluorescence resonance energy transfer (FRET), methyl methacrylate (MMA) and optical switch fluorescent dyes (SP‑PDI‑ DA) and photochromic compound diarylethene (DTE‑BA) as the main raw materials, a multi-wavelength-tunable photoswitchable fluorescent polymer nanoparticle was prepared by one-step miniemulsion polymerization. The nanoparticles can exhibit fast and reversible fluorescence switching characteristics under the irradiation of two kinds of ultraviolet light and visible light. Compared with the existing photoswitchable fluorescent polymer nanoparticles, the photoswitchable fluorescent polymer nanoparticles obtained in the present invention have the advantages of multi-level photoswitching ability, stable water dispersibility, small particle size, low cytotoxicity, and easy preparation, etc. , suitable for enlarged production and practical application, and has great application prospects in technical fields such as information encryption and display materials.

The invention discloses a natural plant enzyme sunscreen cream capable of improving the cell viability and a preparation method thereof. The natural plant enzyme sunscreen cream is prepared from plantenzymes, lattice-modified nano cerium oxide, self-made polyurethane, self-made chitosan, a 15-emulsifier, glycerin and preservative deionized water. According to the natural plant enzyme sunscreen cream and the preparation method thereof, nano cerium dioxide is dispersed into self-made polyurethane resin, a protective film with the adhesion performance can be formed on the surface layer of skin,the protective film adheres to the nano cerium dioxide, the cell viability and ultraviolet absorption are better improved, and positive tetravalent cerium enters cells through the protective film to act; the lattice-modified nano cerium dioxide has higher stability, the condition for forming the protective film through graft copolymerization of the polyurethane and the self-made chitosan is not limited to a wet environment any more, and the formed protective film also has the ultraviolet absorption capacity; and by improving the natural plant enzyme sunscreen cream, the ultraviolet absorptioneffect is enhanced, and the cell viability is improved.

The invention relates to a polyamide ultrafiltration membrane containing a tertiary amine structure, a polyamide nanofiltration membrane containing a tertiary amine structure and a preparation method thereof, belonging to the field of polymer materials. The invention provides a polyamide separation membrane. The polyamide separation membrane is a tertiary amine-containing polyamide ultrafiltration membrane made of a tertiary amine-containing polyamide resin. The invention provides a novel ultrafiltration separation membrane. The obtained ultrafiltration membrane can be transformed into a nanofiltration membrane through acidification treatment; the obtained nanofiltration membrane can be restored to an ultrafiltration membrane through deacidification treatment, thereby realizing ultrafiltration-nanofiltration Filter reversible conversion.

The invention provides a preparation method of super-molecule metal gel and belongs to the field of functional materials. The super-molecule metal gel is obtained by a complex formed by complexing a benzimidazole carboxylic acid derivative as well as metallic lead, cadmium, copper and zinc in H2O / CH3OH, H2O / DMSO, H2O / CH3CN, H2O / CHC13 or H2O / DMF systems under the ultrasonic condition. FT-IR spectrum and X-ray diffraction results show that the gel prepared according to the invention is formed by constraining solvent micromolecules through the coordination complex formed by the benzimidazole carboxylic acid derivative and the metallic ions; and as the gel shows the conversion nature of reversible gel-sol under the acid-base control, the gel can be used for making a controllable molecular switch.