43results about How to "Good light-to-heat conversion effect" patented technology

The invention relates to a preparation method and application of three-dimensional polydopamine, and belongs to the technical field of functional materials. According to the preparation method, dopamine hydrochloride and metal iron salt are used as raw materials, and the three-dimensional polydopamine is prepared by utilizing a self-polymerization and self-assembly. The three-dimensional polydopamine prepared by the method has the advantages of simple method, adjustable size and morphology and the like, and the requirement of environmental protection is met by taking a common water / alcohol system as a reaction solvent. The preparation method of the three-dimensional polydopamine material provided by the invention can promote further development of related research of polydopamine. The three-dimensional polydopamine prepared by the method disclosed by the invention has an excellent photo-thermal conversion effect, and compared with traditional optical materials, the material shows excellent biocompatibility and photo-thermal conversion rate, and plays a role in promoting the research of a photo-thermal agent. The three-dimensional polydopamine material prepared by the method can beused for photothermal therapy of tumors, so that the three-dimensional polydopamine material has a good medical application prospect.

The invention belongs to the technical field of supercapacitor electrode material preparation, and discloses a photothermally enhanced supercapacitor electrode material and a preparation method. The copper foam is put into hydrochloric acid for ultrasonic treatment, and after taking it out, it is cleaned several times with deionized water, and then placed in acetone. Ultrasonic treatment in medium; ultrasonically treat the copper foam treated with acetone ultrasonic treatment with deionized water and alcohol respectively, take it out and dry it in vacuum to complete the pretreatment; put the pretreated copper foam into thiourea solution, carry out hydrothermal reaction, take out after cooling, wash and dry; soak the obtained product in ferric chloride solution, take it out, wash and dry, and then obtain the photothermally enhanced supercapacitor electrode material. The photothermally enhanced supercapacitor electrode material provided by the present invention has a three-dimensional multi-level nanosheet structure and has a large specific surface area, thereby exposing more chemical reaction active sites, achieving the effect of increasing the specific capacity, and has good flexibility and stability.

The invention provides an assembling system for PEGMa modified MoOx and thermosensitive PNIPAM microgel and a preparation method thereof and relates to the assembling system for microgel and the preparation method thereof. The invention aims to solve the problems that the present photothermal conversion material is difficult to realize accurately controllable targeting release of the loaded drug and has toxic and side effects. The chemical formula of the system is PEGMa-MoOx / P(NIPAM-co-MAA). The method comprises the following steps: preparing PEGMa-MoOx and dissolving in deionized water; adding NIPAM, MAA, MBA and SDS and uniformly mixing; heating and introducing nitrogen; adding APS; and reacting and then centrifuging, washing, dialyzing and drying, thereby completing the preparation. The preparation method provided by the invention is simple and feasible, the cost is low, reaction conditions are mild, the operation is easy, the toxic and side effects are few, and the practicability is ultrahigh; the compound microgel can realize a targeting positioning function; and after a photo-thermal chemical treatment effect is achieved, the microgel can automatically degrade within 24h and can be discharged from the body.

The invention provides a preparation method for a polyamino acid / MoS2 nano-cluster. The method comprises the following steps: simultaneously dissolving molybdenum source, sulfur source and polyamino acid in distilled water, wherein the concentration of the molybdenum source is 1-100mg / mL, the concentration of the sulfur source is 1-100mg / mL and the concentration of polyamino acid is 1-100mg / mL; uniformly stirring, and then transferring the acquired solution into a reaction kettle and performing sealing reaction for 12-24 hours at 150-250 DEG C; washing the acquired product with cholamine aqueous solution and distilled water, thereby acquiring the polyamino acid / MoS2 nano-cluster. The preparation method provided by the invention is simple in process; no toxic or harmful solvent is used; the product is easily acquired; the surface modification of the nano-cluster can be synchronously realized; the prepared polyamino acid / MoS2 nano-cluster has excellent colloidal stability, photo-thermal conversion performance and biocompatibility; the polyamino acid / MoS2 nano-cluster is expected to be further used for providing a new thought for a clinic tumor thermotherapy material.

The invention provides a preparation method of a bone repair and tumor suppression material with photothermal conversion performance and functional coating and the material obtained by the method. The process steps of the preparation method: (1) use polyetheretherketone powder and conductive and light-to-heat conversion material powder as raw materials, mix the two powders evenly and form the mixed powder into the desired shape, that is, to obtain a matrix with electrical conductivity and light-to-heat conversion properties; (2) in the case of The performance of the matrix surface is grafted with active functional groups, and then the matrix with active functional groups grafted on the surface is placed in the dispersion liquid as an electrode, and a functional coating is formed on the surface of the matrix by electrophoresis technology. The dispersion liquid consists of liquid Conductive medium, osseointegration-promoting substance and dispersant; (3) After the electrophoresis is completed, the material with a functional coating is washed with deionized water and then dried to remove the water on the surface to obtain a photothermal conversion performance and a functional coating. Materials for bone repair and tumor suppression.

The invention provides an ultrathin nanosheet semiconductor material and a preparation method and application thereof. The preparation method comprises the following steps: heating a first organic solvent with high boiling point to obtain a first solution; heating to dissolve a precursor source AnBm of an A and a precursor source RjVk of an R in a second organic solvent with high boiling point to obtain a second solution; and mixing the first solution and the second solution, and heating with stirring to obtain the ultrathin nanosheet semiconductor material. The invention has the advantages of simple preparation process, good repeatability and strong controllability; the prepared nanometer material has thickness of 1-50 nm and an ultrathin nanosheet structure; and the ultrathin nanosheet semiconductor material prepared by the invention has photothermal conversion effect, and can be used as a novel photothermal conversion material in a solar cell or a solar energy collection device.

The invention provides nanocapsules having a core-shell structure, the nanocapsules are composed of WS2 nanocapsules, the inner part of the WS2 nanocapsules is coated with the Fe3O4 nano particles, and the surface of the WS2 nanocapsules is synchronously modified with a polymer through covalent combination. The invention also provides a preparation method of the nanocapsules having the core-shellstructure, which comprises the following steps: the polymer, a sulfur source, a tungsten source and an iron source are dispersed in a solvent, and the materials are stirred and completely dissolved toobtain a mixed solution; the obtained solution is transferred to a stainless steel reaction vessel having a para-position polyphenyl inner liner for reacting for a certain time in a sealed mode, andthen centrifugation and washing are carried out to obtain the product which is the Fe3O4@WS2-polymer nanocapsules having good colloid stability with the inner part coated with the nano particles and the surface modified with the polymer. The invention also provides an application of the nanocapsules having the core-shell structure as a photo-thermal conversion material. The nanocapsules have highphoto-thermal conversion capability, and can be used in the fields of efficient cooperative diagnosis and treatment for tumor.

The invention belongs to the field of polymer composite functional materials, and discloses a method for preparing a photothermal conversion hydrogel, comprising the following steps: (1) dispersing molybdenum dioxide in water to prepare a molybdenum dioxide dispersion; (2) dissolving Dissolve hectorite in water, then add the molybdenum dioxide dispersion in step (1), mix well to obtain a mixed solution; (3) dissolve N-isopropylacrylamide in step ( 2) into the mixed solution, then add the initiator, cross-linking agent and co-initiator, mix well to obtain the mixed pre-polymerization liquid; (4) inject the mixed pre-polymerization liquid in step (3) into the mold, and react at room temperature for 24 hours , to obtain a hydrogel. The hydrogel prepared by the present invention has remarkable light-to-heat conversion effect, good light transmittance and mechanical properties, and excellent stability in heating and cooling cycles. There is great application potential in other fields.