130results about How to "Good photothermal effect" patented technology

The invention provides a rare earth nano-material with both up/down conversion fluorescence emission and photothermal properties, and a synthesis method thereof. The rare earth nano-material has a multi-level core-shell structure with a controllable size (30-50nm). The innermost layer is NaGdF4:0.3%Nd<3+> with the best down conversion fluorescence property. The layer outside the innermost layer is inert NaGdF4. From the inert NaGdF4 layer to the outside, there are three shell layers which are NaNdF4:10%Yb<3+>/1%Er<3+>, NaGdF4:10%Yb<3+>, and NaNdF4:10%Yb<3+>. Under 808nm near-infrared laser irradiation, the material has both 500-700nm up conversion fluorescence emission and 850-920nm down conversion fluorescence emission. The two fluorescence emissions do not interfere with each other. Also, considerable photothermal effect is produced. According to the invention, for a first time, up/down conversion fluorescence mechanisms and photothermal effect are realized in a same material.

The invention discloses a nano-mesoporous granular drug carrier with the photothermal effect and a preparation method of the nano-mesoporous granular drug carrier, and solves the problems of single treatment method, large toxic and/or side effects, poor effect and the like in the prior art. The preparation method is characterized by comprising the following steps: preparing mesoporous silica nano particles with adjustable particle size and aperture from a surfactant serving as a structure-directing agent and tetraethoxysilane serving as a silicon source through a sol-gel self-assembling process; through modification with an amino functional group, storing a large content of anti-cancer drugs in mesoporous channels of the mesoporous silica nano particles; adsorbing graphene quantum dots on the surfaces of the mesoporous silica nano particles to obtain the nano-mesoporous granular drug carrier which can efficiently convey the anti-cancer drugs and has the photothermal effect. The particle size of the drug carrier is 20 to 200 nm, and the mesoporous aperture is 2 to 10 nm; the mesoporous channels are in tree branch-shaped distribution. The nano-mesoporous granular drug carrier has the function of pH responsive and controlled release of the anti-cancer drugs and the good photothermal effect, has the advantages of realizing a medical chemotherapy and photothermal therapy combination cancer treatment method and has a wide popularization and application value.

The invention belongs to the technical field of photoresist and laser direct writing, and discloses photoresist and a micro-nano temperature and humidity sensitivity intelligent device and preparationmethods thereof. The photoresist comprises a thermosensitive monomer, hydrophilic acrylate, cationic photoinitiator and a solvent, the molar ratio of the thermosensitive monomer to hydrophilic acrylate is (0.5-5):1, each milliliter of mixed liquid of the thermosensitive monomer and the hydrophilic acrylate contains 0.6-2 mg of cationic photoinitiator, the ratio of the total volume of the thermosensitive monomer, the hydrophilic acrylate and the cationic photoinitiator to the volume of the solvent is 10:(0.5-3), the micro-nano temperature and humidity sensitivity intelligent device is preparedfrom the photoresist. The prepared photoresist has hydrophilicity and alcohol affinity, and the prepared intelligent device has the temperature and humidity sensitivity property, and has the advantages of being simple in preparation technology, convenient to operate and the like.

The invention belongs to the technical field of electrochemical catalysis, in particularly relates to a photothermal biological anode, a preparation method thereof and an application of the photothermal biological anode. The preparation method includes the steps: mixing Ti3AlC2 and strong HF solution, and performing reaction for 24-36 hours at the temperature ranging from 60 DEG C to 80 DEG C to obtain Ti3AlC2 to serve as an MXene material; dispersing the MXene material into absolute ethyl alcohol, adding a binding agent, mixing mixture to obtain slurry; coating the surface of a carbon felt with the slurry, and drying the carbon felt to obtain the photothermal biological anode. The proportion of the MXene material to the binding agent is (100-300) mg: (0.1-0.2) mL. The method is simple tooperate and economical in cost, and the photothermal biological anode prepared by the method has good photothermal effect, is applied to preparation of a microbiological electrochemical system and a microbial fuel cell and economical in cost and can provide suitable heat for growth of microorganisms by the aid of solar energy in a low-temperature environment.

The invention provides a photothermal bone repair material. The photothermal bone repair material consists of a synthetic polymer and metal/metal oxide particles, wherein the metal/metal oxide particles are selected from one of magnesium metal particles, aluminum metal nanometer particles, aluminum oxide nanometer particles, ferrum metal particles, ferric oxide nanometer particles and ferroferricoxide nanometer particles. The photothermal bone repair material provided by the invention has photothermal properties of high light absorption efficiency and high photothermal conversion efficiency,after the photothermal bone repair material is implanted into an tumor nidus excision postoperative position, postoperative osteanagenesis can be promoted, besides, peripheral tumor tissue and potential small niduses are subjected to radical cure, and effects of osteogenesis and treatment are achieved.

The invention discloses a preparation method of flame-retardant superhydrophobic sponge with a photothermal effect and a magnetic driving function. The preparation method comprises the following steps: Step 10) pretreating melamine sponge: immersing the melamine sponge in deionized water, ultrasonically washing the melamine sponge, taking out and drying the melamine sponge, then ultrasonically cleaning the melamine sponge in an organic solvent, and drying the melamine sponge to obtain pretreated melamine sponge; Step 20) preparing nano magnetic particle and PDMS treatment liquid; and Step 30)immersing the pretreated melamine sponge in the nano magnetic particle and PDMS treatment liquid for ultrasonic treatment, squeezing out excessive treatment liquid in the melamine sponge, and then drying the immersed melamine sponge in vacuum to obtain the superhydrophobic sponge. The preparation method can improve the hydrophilic sponge material into high-selectivity superhydrophobic superlipophilic sponge to improve the efficiency of oil-water separation.

The invention relates to a membrane distillation device for seawater desalination. The membrane distillation device comprises a hydrothermal input chamber, a vacuum cooling chamber and a condensationtube, the outer layer of the device is a shell wall, a distillation membrane layer is arranged in the device and is a superhydrophobic membrane, the hydrothermal input chamber is arranged between theshell wall and the distillation membrane layer, the vacuum cooling chamber is arranged inside the distillation membrane layer, and the condensation tube is arranged in the vacuum cooling chamber in apenetrating manner. The membrane distillation device is of a reasonable structure and has the characteristics of high distillation efficiency, good energy saving performance and stable operation.

The invention discloses a copper-based human albumin nano-composite with a near infrared thermal effect as well as a preparation method and an application of the copper-based human albumin nano-composite. Growth of an inorganic copper-based nano-composite is induced by controlling the protein concentration, the concentration of a copper salt, the pH of a reaction solution, the reaction time and the reaction temperature; and the copper-based nano structure of a copper sulphate or copper selenide-coated nano composite employing human albumin as a skeleton is synthesized. The copper-based human albumin nano-composite with the near infrared thermal effect has the characteristics of good dispersity, good light stability, high photothermal conversion efficiency, good in-vivo tumor targeting property and the like, and can be applied to photothermal therapy; and efficient heat removal of tumors is realized.

The invention particularly discloses an application of MXene as an initiator. MXene is used as an initiator to initiate polymerization of the olefin monomer under the deoxygenation condition. The MXene is obtained through the following steps that MAX is treated in etching liquid, synchronous etching stripping is carried out under the assistance of ultrasonic waves, and then the material is washed. The invention innovatively provides the following facts: the MXene prepared by the ultrasonic-assisted synchronous etching stripping method unexpectedly has a good initiation effect, and can initiate polymerization of olefin monomers without conventional initiation conditions (such as no conventional light initiation or no common free radical initiator initiation).

The invention discloses a graphene-assisted micro optical fiber ring-shaped cavity all-optical switch which comprises a graphene thin film and a micro optical fiber ring-shaped cavity device and is characterized in that the graphene thin film coats a cavity part of the micro optical fiber ring-shaped cavity device. According to the graphene-assisted micro optical fiber ring-shaped cavity all-optical switch disclosed by the invention, a photothermal effect of the graphene thin film is excited by driving light to generate ohmic heat, and a micro optical fiber ring-shaped cavity is heated by heat conduction; a refractive index of the micro optical fiber ring-shaped cavity is changed due to a thermo-optic effect so as to cause movement of a resonant wavelength of the micro optical fiber ring-shaped cavity; an output power of signal light entering the micro optical fiber ring-shaped cavity is changed along with change of the resonant wavelength; by modulating on or off of the driving light, the maximum or minimum output optical power of the signal light can be controlled, i.e. on or off of the signal light can be achieved. The graphene-assisted micro optical fiber ring-shaped cavity all-optical switch is benefited from a high-efficiency photothermal effect of graphene, the miniaturized micro optical fiber ring-shaped cavity and an all-optical driving technology, has the advantages of compact structure, low cost, high efficiency and the like, and has important application prospect in the fields of optical fiber communication, optical filtering and the like.

The invention discloses a metal phthalocyanine and application thereof in the fields of photothermal materials and photothermal therapy. Irradiated by near-infrared laser, a solution containing the metal phthalocyanine disclosed by the invention has a remarkable photothermic effect, capable of implementing photothermal therapy, and the metal phthalocyanine can be used as a photothermal material orto prepare medicines with the effect of photothermal therapy, and is of great significance for the development of multifunctional phototherapeutic medicines.

The invention relates to the technical field of material surface engineering, in particular to a super-hydrophobic anti-fouling anti-icing water-based paint which comprises the following components in parts by weight: 10-15 parts of fluoride-grafted nano silicon dioxide on the surface, 40-60 parts of perfluorodecyltrimethoxysilane, 10-20 parts of carbon microspheres, 5-8 parts of modified graphene, 30-40 parts of binder and 100-150 parts of solvent. According to the super-hydrophobic anti-fouling anti-icing water-based paint, the super-hydrophobic material and the near-infrared photothermal material are added, so that the super-hydrophobic anti-fouling anti-icing water-based paint has the dual effects of super-hydrophobicity and photothermal deicing, and the near-infrared photothermal material is modified graphene which is a compound of graphene and CdS; and the super-hydrophobic material is very beneficial to formation of a rough micro-nano structure on the surface of the coating, so that the coating can obtain a larger static contact angle and a smaller rolling angle, the icing time of water drops on the surface of the coating is further prolonged, and a better anti-icing effect is achieved.

The invention discloses a nucleic acid aptamer modified molybdenum disulfide nanosheet photothermal agent with targeted identification. A molybdenum disulfide nanosheet photothermal therapy system having the targeting ability is constructed in the invention, wherein the diameter range of a functionalized molybdenum disulfide nanosheet MoS2-BSA-Apt is 80-120 nm; the size of MoS2 in the functionalized molybdenum disulfide nanosheet is 10 nm; the functionalized molybdenum disulfide nanosheet has excellent photothermal effect under irradiation of infrared light; and the functionalized molybdenum disulfide nanosheet has the capability of specifically identifying tumour cells, can be enriched around the tumour cells, and can be moved into target cells. The nucleic acid aptamer modified molybdenum disulfide nanosheet photothermal agent in the invention is an excellent photothermal therapy material, which has excellent biocompatibility and stability, and is high in photothermal conversion efficiency, simple to synthesize, low in cost and toxicity and high in metabolic rate, has the targeting ability, and can be used for treating tumours precisely and effectively.

The invention discloses a processing method of a cellulosic fiber product with a photothermal effect, and belongs to the technical field of functional textile processing. The method comprises the following steps: firstly, introducing vinyl on a cellulose fiber product, and then catalyzing graft polymerization of acrylic acid and N,N-methylene bisacrylamide on a fiber by virtue of horse radish peroxidase, so as to form a net-shaped template containing carboxyl on the surface of the fiber; and then soaking the cellulose fiber product in a copper ammonia solution, and adding sodium sulfide to promote in-situ deposition on the surface of the fiber to form nano copper sulfide particles, so as to obtain the cellulose fiber product with the photothermal effect. According to the a processing method, the illumination self-heating cellulose fiber product is prepared by an adhesive-free method, and meanwhile, an illumination rapid sterilization function is endowed to the cellulose fiber product; and therefore, the cellulose fiber obtains the relatively high photothermal effect, and the application performance of the cellulose fiber product is improved.

The invention provides nanocomposite particles and a preparation method thereof. The preparation method of the nanocomposite particles comprises the following steps: dissolving ZrCl4 in N,N-dimethylmethylamide so as to form a ZrCl4 solution; sequentially adding terephthalic acid, benzoic acid, hydrochloric acid and meso-tetra(4-carboxyphenyl)porphine into the ZrCl4 solution so as to obtain organometallic framework nanoparticles embedded with porphyrin molecules; adding the organometallic framework nanoparticles into a buffer solution; and then, adding dopamine so as to form polydopamine by polymerization of dopamine molecules, thereby wrapping outer surface of the organometallic framework nanoparticles with the polydopamine so as to form nanocomposite particles with a core-shell structure,wherein thickness of the polydopamine layers is 5-50nm and size of the nanocomposite particles is 60-500nm. The nanocomposite particles prepared by the preparation method are uniform in appearance, good in dispersivity, low in biological toxicity, and excellent in photothermal effects and photodynamic therapeutic effects; and thus, the nanocomposite particles have good curative effects on tumors.

The invention discloses a preparation method of a photo-thermal sensitive type composite bacterial cellulose antibacterial dressing. The preparation method specifically comprises the following steps: (1) washing the surface of bacterial cellulose with water, performing rinsing and soaking, performing heating and boiling in a water bath with alkali liquor, repeatedly soaking and washing the bacterial cellulose until the bacterial cellulose is neutral, and performing refrigerating for later use; (2) preparing a dopamine buffer solution, adding a bacterial cellulose membrane, performing lighting, ventilating and standing to react, performing soaking and washing for multiple times until the solution is neutral after reaction, and performing refrigerating for later use; and (3) preparing a chloroauric acid solution, then adding the bacterial cellulose membrane after the surface of polydopamine is modified, performing standing at an opened state to react, performing repeated soaking and washing until the solution is neutral, and performing refrigerating for later use. The antibacterial dressing has excellent mechanical property and adhesion property, the polydopamine and the nanogold are synergized in the photo-thermal effect, photo heat is transformed into high temperature through energy input of low-power near-infrared light, so that a better thermal efficacy sterilization effect is generated, and the antibacterial dressing has a simple preparation process, mild reaction condition and good biocompatibility.

The invention discloses a rapid photo-thermal response shape memory driver as well as a preparation method and application thereof. A substrate of the driver is a flexible substrate fiber membrane with a micro-nano fiber structure and a shape memory function, and cellulose nanocrystalline and a conductive two-dimensional MXene material are deposited on the flexible substrate fiber membrane. The photo-thermal response speed of the shape memory driver is high, and the temperature of the surface of the shape memory driver can rapidly reach 80 DEG C or above within 20 s under the stimulation of near-infrared rays of 80-140 mW/cm <2>.

The invention discloses a polydopamine-coated Prussian blue and silver-loaded nano-composite material, and a preparation method and an application thereof. The composite material is formed by coatingPrussian blue with polydopamine and then growing nano-silver on the polydopamine in situ, and the particle size of the composite material is 100-150 nm. The preparation method comprises the followingsteps: reacting potassium ferricyanide with polyvinylpyrrolidone to obtain Prussian blue, adding dopamine into a Tris-HCl solution of Prussian blue to prepare polydopamine-coated Prussian blue, and mixing and stirring the obtained polydopamine-coated Prussian blue dispersion, ammonia water, a reducing agent and a silver nitrate solution to react in order to make nano-silver grows on the coating layer polydopamine in situ in order to obtain the product. The nano-composite material has a good antibacterial effect, is not prone to causing drug resistance of bacteria, has good stability and dispersity, the preparation method has the advantages is simple and mild, short in time consumption, low in energy consumption and easy to realize large-scale production, and the nano-composite material canbe used for preparing photo-thermal antibacterial drugs or chronic traumatic infection treatment drugs.

The invention provides new application of artemisinin and a derivative thereof, namely that the artemisinin or the derivative thereof is directly used as a sensitizer for thermodynamic therapy, and isused for thermodynamic therapy of tumors; or a liposome nano-composite prepared from the artemisinin and the derivative thereof and indocyanine green is used as a sensitizer for the thermodynamic therapy, and is used for thermodynamic therapy and/or photothermal therapy of the tumors. when being used for thermodynamic therapy of the tumors, the artemisinin or the derivative thereof and the liposome nano-composite not only show excellent tumor targeting performance, but also have extremely high synergistic photothermal therapy and thermodynamic therapy anti-tumor activity, and have remarkableadvantages as an anti-cancer drug.

The invention discloses an organic-inorganic hybrid multifunctional biological material based on nanocellulose crystals and a preparation method and application thereof. The material is mainly composed of the nanocellulose crystals (CNC), polydopamine (PDA) and gold nanostars (AuNSs), wherein the CNCs serve as a substrate material, the PDA serves as a coupling material and can be used as a bridgefor connecting the CNCs and the AuNSs, and the surface of an organic-inorganic hybrid nano material is modified with polyethylene glycol molecules with certain functional end groups, so that the salttolerance and expandability of the nano material in an in-vivo environment are ensured. The material disclosed by the invention is simple to prepare and convenient to use, can greatly improve the salttolerance of the CNC, has relatively strong absorption in a near-infrared region, has good biocompatibility and remarkable photoacoustic signal and photothermal effect, and can achieve the purposes of tumor imaging and tumor treatment.

The invention relates to a drug-loaded creased graphite pebble photo-thermal preparation, and preparation and application thereof. A preparation method for the drug-loaded creased graphite pebble photo-thermal preparation comprises the following steps: adding an aqueous solution of graphene oxide into an aqueous drug solution, adjusting a pH value, and carrying out shaking-up so as to obtain a drug-loaded compound; and preparing an aqueous solution of the drug-loaded compound, carrying out atomization, allowing atomized aerosol drops to pass through a quartz tube, carrying out collection with a polytetrafluoroethylene (PTFE) filter membrane at a tail end, and then carrying out drying so as to obtain the preparation. The drug-loaded compound and cancer cells are subjected to co-culture, infrared light is used for irradiation, and comparison with a non-illumination group and a pure DOX group is carried out so as to detect the killing effect of a material on cancer cells. The novel drug-loaded photo-thermal preparation in the invention has unique photo-thermal characteristics, is simple to prepare and suitable for industrial large-scale preparation, can be used for antineoplastic research and has good practical value.

The invention relates to a bone repairing stent and a preparing method thereof, belonging to the technical field of biomedical engineering. The stent includes gold nanorods, beta-tricalcium phosphateand gelatin methacryloyl. Through 3D printing and freeze-drying techniques, the gold nanorods having good photothermal effects are composited with the beta-tricalcium phosphate and the gelatin methacryloyl which have good osteogenic capability to prepare the bone repairing stent having good photothermal effects, and therefore, the stent has good photothermal anti-tumor capability, good biocompatibility and bone repairing and inducing capability, meeting the objectives of repairing and treating bone tumor defects.

The invention discloses a preparation method of a durable photo-thermal real-time self-repairing super-amphiphobic coating, which comprises the steps of synthesizing a styrene/styrene derivative-bisphenol A diglycidyl ether monoacrylate copolymer capable of generating a steam-induced phase separation function through ring-opening reaction, free radical polymerization and cross-linking reaction, wherein the copolymer has a bonding effect, a self-repairing effect and a micron 'armor' protection effect generated by phase separation, so that the coating is endowed with excellent durability; and introducing fluorinated carbon nanotubes with excellent photo-thermal effect and heat-conducting property into a self-repairing polymer so as to endow the coating with excellent super-amphiphobic property, durability and real-time photo-thermal self-repairing property, and then obtaining the durable photo-thermal real-time self-repairing super-amphiphobic coating through steam-induced phase separation and curing crosslinking. According to the coating, real-time self-repairing of the super-amphiphobic coating on micro-nano structure damage and chemical damage can be achieved by means of sunlight, and a solid foundation is laid for practical application of the super-amphiphobic coating.