213results about How to "Excellent light-to-heat conversion performance" patented technology

The invention relates to a preparation method of biocompatible photo-thermal response self-healing conductive hydrogel, which includes: preparing solution from N,N-dimethyl acrylamide monomer, potassium persulfate serving as initiator and N,N,N',N'-tetramethylethylenediamine serving as accelerator; then soaking graphene hydrogel into the monomer solution for solution displacement and standing; and finally, initiating polymerization reaction at the room temperature, so that the biocompatible photo-thermal response self-healing conductive hydrogel is prepared. The preparation method is simple in process, mild in reaction condition, short in reaction time and suitable for industrial production. The hydrogel uses the graphene as a three-dimensional network framework, the graphene is high in reduction degree, chemical stability, electric conductivity and mechanical strength and good in photothermal conversion effect, and the hydrogel shows good self-healing performance within the body temperature range and under near-infrared irradiation.

The invention discloses a polydopamine modified black phosphorus, and a preparation method and applications thereof. The polydopamine modified black phosphorus comprises black phosphorus and polydopamine attached to the surface of the black phosphorus. The black phosphorus is coated with a uniform layer of polydopamine, so that the black phosphorus is isolated from oxygen and water vapor completely, and the black phosphorus stability is increased. The polydopamine modified black phosphorus possesses relatively excellent photothermal conversion performance and biocompatibility, is promising tobe applied in the fields such as photoelectric field and biological medical science. The invention also provides a preparation method of the polydopamine modified black phosphorus; the preparation method is simple; yield is high; the polydopamine modified black phosphorus is friendly to the environment; and low cost large scale production can be realized.

The invention relates to a Prussian blue-based intelligent pH-triggered MRI drug release-monitoring synergetic nanometer diagnosis and treatment agent and a preparation method thereof. The nanometer diagnosis and treatment agent comprises hollow Prussian blue nanometer particles with mesopores. The surfaces of the hollow Prussian blue nanometer particles with mesopores are coated with KxMny[Fe(CN)6]z, wherein x is greater than or equal to 0.05 and less than or equal to 0.3, y is greater than or equal to 0.5 and less than or equal to 0.98 and z is equal to 1. The nanometer diagnosis and treatment agent comprises hollow mesoporous nanometer particles with core-shell structures. The HMPB-Mn nanometer diagnosis and treatment agent is used for tumor part pH-sensitive MRI and pH-sensitive drug release control in chemotherapy. Through combination with thermotherapy, MRI-guided thermotherapy-chemotherapy combined treatment on tumors is realized.

The invention discloses a novel near-infrared two-zone organic small-molecule fluorescent probe and includes a concrete structure, a preparation and application. The main component of the novel near-infrared two-zone organic small-molecule fluorescent probe is a diketopyrrolopyrrole (DPP) derivative; and nano-particles with good water solubility, biocompatibility and targeting are prepared furtherwith a nanometer coprecipitation method, have excellent near-infrared two-zone fluorescence imaging and photoacoustic imaging abilities as well as photodynamic and photothermal conversion propertiesand can be used for tumor targeted photothermal and photodynamic combination therapy under the guidance of near-infrared two-zone fluorescence imaging, photoacoustic imaging, so that the therapeutic effect is remarkably improved; in addition, based on photodynamics therapy (PDT) and photothermal therapy (PTT), the toxic and side effects and the tumor drug resistance to normal tissues can be prevented and lowered; and the novel near-infrared two-zone organic small-molecule fluorescent probe is excellent in imaging effect, small in toxic and side effects and remarkable in curative effect and hasa relatively good clinical application prospect as a novel imaging probe and a tumor targeted combination therapy reagent.

The invention discloses a method and a device for efficient photo-thermal water evaporation, belonging to the technical field of water evaporation. The device comprises a water conveying channel, a floating/heat insulation layer, a water-rich porous material layer, a water-poor porous material layer and a photo-thermal conversion material layer, wherein the floating/heat insulation layer floats the whole device on a water surface, connects a water body with the device through the strong water absorption characteristic of the water conveying channel and provides enough water for the device; thewater-rich porous material layer adopts a porous material layer with strong water absorption, so water can be dispersed into the water-rich layer from the water conveying channel and expanded to thewhole device; the water-poor porous material layer is a relatively weak water-absorbing material; and the photo-thermal conversion material layer is a material with high photo-thermal conversion capability. Water is subjected to one-step rapid water conveying and water dispersion through the water conveying channel and the water-rich porous material layer; then the amount of water in contact withthe photo-thermal material is further reduced through the water-poor layer; and finally, a trace amount of water can be locally and efficiently heated on the photo-thermal material, and a water evaporation rate is increased.

The invention relates to polyacrylonitrile/copper sulphide photo-thermal nanofiber fabric, and a production method and an application thereof. Polyacrylonitrile PAN nanofibers are used as a substrate, and copper sulphide CuS nano-particles are distributed on the surfaces of the polyacrylonitrile PAN nanofibers. The production method has the steps of soaking PAN nanofiber cloth including copper salts into sulfur source solution for sulfidizing, and drying. According to the fabric and the production method thereof provided by the invention, photo-thermal material is extended to the solid fibers from the solution, so that utilization limitation of the photo-thermal material is broken, and the fabric is expected to be widely applied to the fields of new generation solar heating equipment and new generation solar warm clothes.

The invention discloses an amphipathy tri-block polypeptide ICG (Indocyanine Green) loaded micelle and a preparation method thereof. The amphipathy tri-block polypeptide ICG loaded micelle comprises a core, a middle layer and a shell, wherein the core is formed by polyleucine; the middle layer surrounds the core and is formed by polylysine; the shell is inserted into the middle layer and is formed by polyethylene glycol; and indocyanine green is dispersed in the core. By forming the core-shell structure to wrap the indocyanine green in polyethylene glycol-b-polylysine-b-polyleucine tri-block hybridized polypeptide, the indocyanine green is effectively prevented from being accumulated to decompose, so that the stability is enhanced. The prepared amphipathy tri-block polypeptide ICG loaded micelle has the characteristics of spatial stability, long circulation and the like, and has excellent fluorescence property, photothermal conversion capability as well as good passive targeting property, biocompatibility and degradability; optical imaging and photo-thermal treatment on tumor cells or tissues can be realized.

The invention provides a preparation method of a PVP-modified sodium alginate/polydopamine composite nano-material. The preparation method is characterized by comprising the following steps: sprayingan aqueous solution containing sodium alginate and dopamine to a coagulating bath with pH 9-11 and containing polyvinylpyrrolidone (PVP), CaCl2 and trihydroxymethyl aminomethane, centrifuging and separating, and washing to obtain the PVP-modified sodium alginate/polydopamine composite nano-material. In vitro/in vivo biosecurity experiments and cancer therapy experiments prove that the PVP-modifiedsodium alginate/polydopamine composite nano-material has excellent biocompatibility, phototherapeutic ability and photothermal therapy and chemotherapy combined treatment ability.

The invention provides a shape-stabilized phase-change composite material capable of efficiently utilizing solar energy. The composite material comprises an inorganic carrier propping material, an organic phase-change thermal storage material and a photothermal conversion nano-material, wherein the inorganic carrier propping material are filled with the organic phase-change thermal storage material and the photothermal conversion nano-material. The invention further provides a method for preparing the shape-stabilized phase-change composite material capable of efficiently utilizing solar energy. The method comprises the following steps: (1) preparing CuS nano-powder; and (2) preparing a paraffin-SiO2-CuS shape-stabilized phase-change composite material. The shape-stabilized phase-change composite material has the characteristics of relatively high thermal storage capacity and stable shape in the phase-change process, has a remarkable photothermal conversion capability, can be used for more effectively converting sunlight into thermal energy and storing the thermal energy, and is capable of providing a new approach to effective utilization of solar energy. The composite material prepared by adopting the method has the advantages of good dispersibility of components, excellent compounding effect and stable material structure.

The present invention provides a preparation method of cantharidin-loaded tumor cell membrane-encapsulated tellurium elementary substance nanoparticles and belongs to the field of nano biomedicine. The nanoparticles prepared from tellurium elementary substance as a core, cantharidin as a model drug and tumor cell membranes as an outer layer coating. The tellurium nano-material and the cantharidinhaving toxic and side effects on organisms are encapsulated by the tumor cell membranes in the nanoparticles, so that biocompatibility of the nanoparticles is improved, immune cells are effectively prevented from being cleared, and the nanoparticles have homologous targeting capability; after intravenous injection, the nanoparticles are massively gathered at tumor sites through an EPR effect and ahomologous targeting property, the tellurium elementary substance is rapidly heated under near-infrared stimulation to cause outer cell membrane rupture, and the leaked cantharidin inhibits a heat shock reaction of tumor cells, enhances a photo-thermal treatment effect of the tellurium elementary substance, and kills tumor cells. The method is reasonable in design, simple in preparation technology and wide in application prospect, and lays a foundation for design and development of a corresponding drug delivery system.

The invention relates to a method for preparing a graphene composite structural material, which belongs to the technical field of preparation of a functional material. The method combines with a vapour deposition technology, a freeze drying technology, and a laser processing technology, construction of a composite structure in a graphene block material is realized, the graphene assembly is composited with two structures, the prepared composite structural material has a two-layer structure, wherein an upper layer is a porous gel structure having good photothermal conversion capability, a lowerlayer is a film structure having good electrothermal conversion capability, and compositing of two structures and properties in the graphene material is realized. The preparation method has the advantages of easy operation, matured synthesis technology, and large-batch production. The porous gel structure at the upper layer of the prepared graphene composite structural material can convey the solar irradiance to self heat energy, the structure at the lower layer can convey electric energy to heat energy, and under synergism of light, heat and electricity, the graphene composite structural material is in favor of application in the fields of solar energy cleaning water and anti-freeze equipment.

The invention relates to antibody coupling bismuth selenide nanometer particles for united treatment of tumor thermal treatment and immunotherapy and a preparation method of the antibody coupling bismuth selenide nanometer particles, and belongs to the field of a pharmaceutical preparation. According to the antibody coupling bismuth selenide nanometer particles, amination bismuth selenide is usedas a carrier, PEG is used as a cross-linking agent, and a CD47 resisting antibody is coupled to the surfaces of the nanometer particles. After an antibody coupling bismuth selenide nanometer particlesuspension is intravenously injected, the nanometer particles can be massively gathered to a tumor part in a targetted manner through an EPR effect, and the condition that drug administration of the CD47 resisting antibody to whole bodies of causes anemia, is avoided. Besides, the surface-modified CD47 resisting antibody and tumor cell surfaces are high-expressed CD47 molecule specific recognition, and CD47 and SIRP alpha signal channels are closed, so that macrophages anew obtain the capacity for swallowing tumor cells. Particularly, tumor cells are subjected to thermal treatment, the residual tumor cells are eliminated by the macrophages because a signal channel free from drug administration is closed, and the purpose of thoroughly eradicating rumors is realized. The method is reasonablein design, and simple in preparation technology, has broad application prospects, and lays a foundation for design and development of a corresponding drug administration system.

The invention discloses liquid metal aerogel as well as a preparation method and application thereof. The liquid metal aerogel has a continuous three-dimensional porous network structure; the continuous three-dimensional porous network structure is formed by overlapping liquid metal nanoparticles and a graphene sheet layers, and at least a part of the liquid metal nanoparticles are wrapped by thegraphene sheet layers. The preparation method comprises the following steps: dispersing a liquid metal in a polysaccharide aqueous solution to form the liquid metal nanoparticles, and wrapping the liquid metal nanoparticles with polysaccharide to obtain a stable dispersion liquid; uniformly mixing the stable dispersion liquid with graphene oxide, adding a metal hydroxide colloid and glucolactone,carrying out ionic crosslinking, standing to obtain a liquid metal hydrogel, and carrying out reduction, solvent replacement treatment and drying treatment to obtain the liquid metal aerogel. The liquid metal aerogel has the advantages of high specific surface area, low density, high thermal conductivity, hydrophilicity, chemical stability, simple preparation process, mild and controllable reaction conditions and a wide application prospect.

The invention relates to a preparation method of a multi-response graphene/graphite oxide film. The method comprises the following steps of: ultrasonically dispersing the graphite oxide in deionized water to obtain a graphite oxide aqueous solution, and then, regulating the pH value to 2-6 by using acid; placing an active metal plate in the graphite oxide aqueous solution, placing the graphite oxide aqueous solution on a horizontal platform and maintaining temperature of 10-15 DEG C, standing, taking out the active metal plate 1-7 days later, washing, drying, and peeling off the film, then, thereby obtaining the multi-response graphene/graphite oxide film. The preparation method provided by the invention is simple, and can implement large-scale and low-cost production.

The invention provides a preparation method of a fabric of a photo-thermal conversion material with a core-shell structure. The preparation method comprises the steps of (1) preparing copper sulfide nanoparticles; (2) preparing core-shell structure nanoparticles of polydopamine coated copper sulfide; (3) pretreating the fabric with a cationic modifier; and (4) depositing the shell-core structure nanoparticles of polydopamine coated copper sulfide on the surface of the cationic fabric. In addition, the invention also provides a fabric of the photothermal conversion material with the core-shellstructure, which is prepared according to the preparation method of the fabric of the photothermal conversion material with the core-shell structure. The method for preparing the photo-thermal conversion fabric by using the shell-core structure nano material is simple to operate and mild in condition. The prepared photo-thermal conversion fabric is rapid in temperature rise, the temperature rise temperature can be regulated and controlled by adjusting parameters of an infrared light source, the photo-thermal conversion capacity can still be kept after multiple times of infrared light irradiation, and the stability is good.

The invention discloses a gold nanoparticle/graphene nano composite material which is prepared by a chemical assembly method for gold nanoparticles and graphene, and a directional freeze-drying methodis used for preparing the gold nanoparticle/graphene nano composite material into a gold nanoparticle/graphene three-dimensional light-heat (steam) conversion material. The material can efficiently convert light energy into heat energy, so that water can be quickly heated into water vapor to finally achieve the water purifying purpose, and therefore, various functions such as seawater desalting,fractionation, sterilization and sewage treatment are realized.

The invention discloses a phase-change composite material with a photo-thermal conversion function and a preparation method thereof, and belongs to the cross field of phase-change energy storage and energy conversion. The multifunctional phase change composite material is prepared by combining Ti2O3 nano particles with a heat storage phase change material for the first time, so that a photo-thermal conversion function is expected to be provided on the basis of phase-change heat storage and temperature control functions, and the carbon foam-based phase-change composite material which is is easy to cut and process, has a controllable appearance size, has light weight and flexibility, and has photo-thermal conversion performance is provided. Due to the three-dimensional porous carbon foam matrix of the phase change composite material, the phase-change material can be stably stored, and the storage capacity can be regulated and controlled. The phase-change composite material has excellent photo-thermal conversion and temperature adjusting functions and can be used in the aspects of heat energy storage and release, thermal insulation, photo-thermal conversion, infrared stealth and infrared decoy of military equipment, and the like.

The invention discloses a preparation method of a foamed nickel-based photothermal conversion material and relates to a preparation method of a photothermal conversion material. The invention aims to solve the problem of relatively great heat loss and complex preparation process, relatively high cost and relatively large occupied area as a liquid needs to be heated integrally in conventional photothermal conversion. The preparation method comprises the following steps: I, foamed nickel pre-treatment; and II, solvothermal reaction to obtain the foamed nickel-based photothermal conversion material. The photothermal conversion material prepared by means of a hydrothermal method is a semiconductor material in a flower-type structure formed by clustering a plurality of needle substances. The photothermal conversion material has relatively high absorptivity and can fully absorb light, the wavelengths of which are 0.25-2.5 [mu]. In addition, the material has excellent photothermal conversion performance and can fully convert absorbed light energy into heat energy and evaporate water on the surface of a microstructure of the material. The preparation method disclosed by the invention can be used for obtaining the foamed nickel-based photothermal conversion material.

The invention discloses a preparation method of a membrane material for solar interface evaporation seawater desalination. The method comprises the following steps: dissolving PLA particles in a chloroform/N, N-dimethylformamide mixed solvent, then respectively adding PLA-g-HPC and Ti3C2Tx (MXene) nanosheets, stirring, carrying out ultrasonic treatment, and carrying out electrostatic spinning to obtain a PLA/PLA-HPC/MXene membrane. According to the invention, PLA-g-HPC is used as a dispersing agent and functional particles, Ti3C2Tx(MXene) nanosheets are introduced, and MXene is uniformly dispersed in the PLA/PLA-HPC/MXene membrane, so that the PLA/PLA-HPC/MXene membrane has very good photothermal conversion performance and mechanical stability; and the PLA/PLA-HPC/MXene membrane has a three-dimensional hierarchical porous structure, so that the PLA/PLA-HPC/MXene membrane has a relatively large specific surface area, water evaporation is facilitated, and the evaporation efficiency is improved.

The invention belongs to the technical field of photothermal conversion materials, and discloses a nanoparticle photothermal conversion material based on coordination of iron and dopamine and a preparation method and application thereof. The preparation method comprises the following operation steps of: firstly, preparing a nanoscale iron-based metal organic framework by using a hydrothermal synthesis method; and then combining the dopamine in the nanoscale iron-based metal organic framework through the action of a coordination bond by virtue of a coordination effect of phenolic hydroxyl on the dopamine and the iron on the iron-based metal organic framework, so as to obtain the nanoparticle photothermal conversion material based on coordination of the iron and the dopamine. The material can be well applied to photothermal therapy drug preparation, photoacoustic imaging, nuclear magnetic imaging, drug loading or functional modification.