236results about How to "Good light and heat stability" patented technology

The invention discloses a copper porphyrin titanium dioxide composite photocatalyst and a preparation method thereof. The specific technical scheme is that: copper porphyrin as shown by the following structure is adsorbed on the surface of a pure anatase type titanium dioxide particle, and the mass ratio of the copper porphyrin to the titanium dioxide is (0.1-1):100. The preparation method comprises the following steps of: according to the mass ratio of the copper porphyrin to the pure anatase type titanium dioxide of (0.1-1):100, dissolving the copper porphyrin by using trichloromethane or dichloromethane; adding the titanium dioxide into the copper porphyrin, and fully stirring the mixture; performing reduced pressure distillation to remove a solvent; collecting the copper porphyrin titanium dioxide composite photocatalyst; and grinding and drying the copper porphyrin titanium dioxide composite photocatalyst. The copper porphyrin titanium dioxide composite photocatalyst can be synthesized simply, has stable properties, high activity and reusability, and can degrade stable organic matters.

The invention discloses a casting polypropylene film with a controllable friction coefficient and a preparation method thereof, belonging to the technical field of packaging materials. The casting polypropylene film sequentially comprises a corona layer, a middle layer and a heat-seal layer with a thickness ratio of (20-30) to (50-65) to (15-20). The corona layer is made from homo-polypropylene or polypropylene random copolymer, the middle layer is made from isotactic homo-polypropylene, and the heat-seal layer comprises 90wt%-98wt% of propylene copolymer, 1wt%-3wt% of adhesion resisting agent and 1wt%-7wt% of macromolecule slip agent, namely silicone master batch. The preparation method sequentially comprises the following steps: mixing materials, extruding to form a film, cooling for shaping, measuring thickness, aureoling, trimming, reeling, performing aging treatment, and slitting. The heat-seal layer is uniformly dispersed in main body resin by the macromolecule slip agent, and the slip agent is well compatible with the main body resin due to high molecular weight, and thus a film surface friction coefficient is prevented from being changed by migration of the macromolecule slip agent due to temperature of a storage or usage environment.

The invention relates to a preparation method of a gold/nitrogen-doped hollow carbon nanosphere core-shell material, belonging to the field of biomedical materials. The preparation method comprises the steps of firstly, preparing gold sol by using a sol-gel method; secondly, coating the surfaces of gold particles with SiO2 by using an improved stober method, and then forming Au@SiO2@PDA spheres in a weak alkaline water-containing environment by means of auto polymerization of dopamine; finally, carrying out high-temperature calcination, and obtaining the gold/nitrogen-doped hollow carbon nanosphere core-shell material after NaOH is etched. The method is simple, mild and environment-friendly, and does not add additional toxicity; the prepared gold/nitrogen-doped hollow carbon nanosphere core-shell material has the particle size of about 165-175nm; as a near-infrared photothermal therapeutic agent for treating tumors, a product not only has good biocompatibility and light and heat stability, but also has the characteristic of having an internal hollow structure; after the gold/nitrogen-doped hollow carbon nanosphere core-shell material is used, the speed of particle exchange is accelerated, and the photothermal conversion efficiency is improved.

The invention discloses a large-load running rail dry-film lubricant, belonging to the single-constituent room-temperature solidification type dry-film lubricant, comprising the following constituents by weight parts: modified thermal plastic acrylic ester copolymer 30-40 parts, coupling agent 2-6 parts, nano Al2O3 0.5-4 parts, solid lubricant 55-70 parts, solvent 350-500 parts, additive 6-8 parts. The dry-film lubricant has features of good anti-friction and abrasion proofness; good extreme pressure property; no corrosion; safe use, construction and convey; accordance with environmental protection requirement; lower cost and wide application.

The invention discloses a high-performance Ag2O/Bi2WO6 compound light catalyst and a simple preparing method thereof. The method comprises the steps that AgNO3 and NaOH of equal stoichiometric ratio serve as initial reactants at room temperature under the condition of ordinary pressure, chemical depositing is performed on the surfaces of Bi2WO6 particles in a one-step mode to generate Ag2O by utilizing ultra instability of AgOH, and the Ag2O/Bi2WO6 compound light catalyst is obtained. Research results show that not only can Ag2O modification broaden the visible light absorption range of the Bi2WO6, but also the compounding probability of photon-generated carriers of a semiconductor can be effectively inhibited. Furthermore, the photocatalytic activity of the compound catalyst is obviously improved when the mass percent of the chemical element Ag is within the range of 0.2%-3.4%, when an Ag wt. % equals 0.6 %, the photocatalytic activity is optimized, and the kinetic constant of the photocatalytic activity is 4.7 times of the net Bi2WO6. Moreover, the compound light catalyst shows good reusability in degrading organic dyestuffs. The simple preparing method of the high-performance Ag2O/Bi2WO6 compound light catalyst and the reusability predict good application prospects of the compound light catalyst.

The invention relates to novel structural derivatives using perylene double imide as cores and applications to organic electroluminescent devices thereof, which belongs to the field of organic electroluminescent material preparation. The perylene double imide derivatives are characterized in that four harboring positions of 1,6,7,12- of perylene double imide derivatives are connected with charge transport functional groups with different structural types as well as different conjugate degree. The derivatives are synthesized by the following method; first 1, 6,7,12-four halogenated perylene double imide is used for synthetizing a perylene double imide with acetylene activity groups, and then Diels-Alder cycloaddition or C-N and C-C couplings react with cyclopentadiene ketone or arylamine with functional substituents so as to prepare target derivatives. The compounds have favorable thermal stability, stable format, solubility and unique electro-optical properties. The materials are usedfor preparing luminescent lights, change transport layer for the preparation of the layer on doping type electroluminescent devices, and the materials are expected to become favorable main red electroluminescent materials.

The invention relates to the field of biomedicine, in particular to a multi-functional bismuth selenide nanocomposite and a preparation method and application thereof. The multi-functional bismuth selenide nanocomposite aims to solve the problems that the synthesis condition and process of the existing hyperthermia chemotherapy nano material are complex, the biological safety is poor, the drug loading capacity is low, the existing hyperthermia chemotherapy nano material is short of an appropriate imaging diagnosis function, the heat-light properties need to be improved, and the existing hyperthermia chemotherapy nano material is short of clinical experimental verification. The grain size of the multi-functional bismuth selenide nanocomposite is 50 nm to 200 nm, and the drug loading capacity for loading doxorubicin hydrochloride is 3% to 10%. The preparation method comprises a step 1 of preparing Bi2Se3 nanosheets; a step 2 of preparing Bi2Se3@PDA nano particle dispersion liquid; and a step 3 of preparing the multi-functional bismuth selenide nanocomposite. The multi-functional bismuth selenide nanocomposite serves as the hyperthermia chemotherapy nano material to be utilized in hyperthermia chemotherapy of a malignant tumor or serves as a CT imaging contrast agent to be utilized in CT imaging diagnosis of the malignant tumor.

The invention discloses a molybdenum dioxide nano photothermal conversion material and a preparation method and application thereof. A high activity solvothermal precursor is obtained by laser ablation of high pure molybdenum in a mixed solution by combination of a liquid phase laser ablation technique and a solvothermal method; and molybdenum dioxide nano nanoparticles are synthesized by reaction under mild conditions by the solvothermal method. The prepared molybdenum dioxide nano nanoparticles have surface plasmon resonance properties, can produce strong light absorption in a near infrared band, can be used for effective conversion of absorbed light into heat so as to kill cancer cells under near infrared laser irradiation, have excellent photothermal stability and biological compatibility, and can be used for the preparation of a photothermal treatment reagent, the photothermal treatment reagent comprising the molybdenum dioxide nano photothermal conversion material is injected into a tumor site, tumor is irradiated by near infrared laser, the growth of the tumor can be effectively inhibited, and the molybdenum dioxide nano photothermal conversion material has wide application prospect in the field of tumor photothermal therapy.

The invention provides a pure organic dye adopting multiple heterocycles and derivants thereof as a conjugated unit and a dye-sensitized solar cell prepared thereby. Multiple heterocycles of differenttypes and derivants thereof are selected to be used as the conjugated unit so that pure organic dye with broad spectral response and high mole extinction coefficient can be prepared. The absorption spectrum of the pure organic dye adopting multiple heterocycles and derivants thereof as the conjugated unit exceeds 580 nm, thereby realizing the breakthrough of absorption spectrum of dye; and the dye-sensitized solar cell prepared by the pure organic dye realizes the 5 percent of photoelectric transformation efficiency, and has favorable photo-thermal stability. The pure organic dye adopting multiple heterocycles and derivants thereof as the conjugated unit has the advantages of simple synthetic method, low cost of raw material for reaction and easy purification of target molecules.

The invention belongs to the technical field of photocatalyst materials for degrading wastewater pollutants and discloses a preparation method of a Bi2O2CO3/PPy/g-C3N4 compound photocatalyst and application of the Bi2O2CO3/PPy/g-C3N4 compound photocatalyst to Rhodamine B degradation under simulated sunlight. The preparation method includes: mixing a polypyrrole (PPy) doped bismuth subcarbonate (Bi2O2CO3) composite material with graphite-phase carbon nitride (g-C3N4) in an organic solvent according to the proportion, performing heating reflux, washing obtained products for several times, and performing vacuum drying to obtain the Bi2O2CO3/PPy/g-C3N4 compound photocatalyst material. The preparation method has the advantages that the preparation method is simple and easy to achieve large-scale industrial production, the prepared compound material is stable in property and high in photocatalytic activity, the spectral response range of Bi2O2CO3 is expanded, sunlight utilization rate is increased, and the prepared compound material has a good degrading effect on organic dye Rhodamine B of certain concentration and is applicable to dye wastewater treatment.

the invention discloses a linear organic hole transport material as well as a preparation method and application thereof. According to the linear organic hole transport material, a rigid coplanar thiophene fused heterocycle serves as a parent core, the linear planar molecular structure can effectively improve the hole mobility and the conductivity, and the material has good dissolving film-formingperformance and excellent photo-thermal stability. The preparation method for the linear organic hole transport material has the advantages that the synthetic route is simple, the raw materials are easily available, the cost is low, when the prepared hole transport material is applied to a perovskite solar cell, the short-circuit light current density of a battery device reaches 22.31 mA cm<-2>,the open-circuit voltage is 1.094 V, the filling factor is 0.756, the photoelectric conversion efficiency reaches 18.45%, and therefore the efficiency of the perovskite solar cell is improved, and a wide application prospect is achieved.

The invention discloses a bismuth sulfide/gadolinium oxide-entrapping ultrafine protein composite nanoparticle with a near-infrared photothermal effect and a multi-mode imaging function and a preparation method and application thereof. By formulation screening and process optimization, the bismuth sulfide/gadolinium oxide albumin ultrafine composite nanoparticle with the near-infrared photothermaleffect and the multi-mode imaging function is prepared in one step. The composite nanoparticle has good physicochemical stability, photostability, biocompatibility and tumor-targeting property, can remarkably enhance near-infrared fluorescence, photoacoustic, magnetic resonance, CT (computed tomography) and thermal signals at a tumor site, and realizes multi-mode-complemented tumor diagnosis, andmoreover, the composite nanoparticle can eliminate tumors under the excitation of near-infrared light; in particular, because the grain size of the nanoparticle is less than 5.5nm, the nanoparticle can be eliminated by the kidneys, and toxic and side effects are minor; a tumor can be diagnosed and treated at the same time, and the composite nanoparticle has a great potential in realizing accuratetumor diagnosis and treatment integration.

The invention provides a preparation method of nylon 6 having high hygroscopicity, high dyeing property and high elasticity, The method is characterized by adding 50-85 parts of caprolactam, 5-8.5 parts of ring-opening agent, 0.3-6 parts of dicarboxylic acid blocking agent and 0.3-6 parts of composite amine modifier into to a reaction vessel; under the protection of nitrogen, preparing composite amine/polyamide performed polymer through ring opening, normal-pressure polymerization and reduced-pressure polymerization; adding polyether with same number of moles as the dicarboxylic acid blocking agent, preparing composite amine/polyether/polycaprolactam copolymer in the presence of a catalyst through normal-pressure polymerization and reduced-pressure polymerization; and extracting and drying to obtain the final product of nylon 6 with high hygroscopicity, high dyeing property and high elasticity. According to the invention, the method has simple process, production can be performed by using existing equipment, and nylon 6 not only has excellent physical and mechanical properties, but also has good spinnability, optical/thermal stability, elasticity, hygroscopicity and dyeing property, thus not only having enhanced dying depth and dying uniformity, but also being capable of being applied to chemical fiber, engineering plastics, membrane materials and the like.

The invention provides a pure organic dye containing conjugated units of different heterocyclic rings and derivatives thereof and application thereof in a dye-sensitized solar cell. The pure organic dye belongs to molecules of a D-phi-A structure. Segments of a donor, a phi conjugated system and a receptor are properly adjusted and controlled respectively to form the pure organic dye with wide spectral response and high molar extinction coefficient. The absorption spectrum of the pure organic dye is over 570 nanometers already close to the absorption of ruthenium dye; and when the pure organic dye is applied to the dye-sensitized solar cell, the photoelectric conversion efficiency of more than 10 percent is obtained, so the dye is the current most efficient and stable pure organic dye.

The invention relates to a fluoro fused ring benzothiadiazole polymer acceptor material and a preparation method thereof. The fluoro fused ring benzothiadiazole polymer acceptor material comprises a fused ring benzothiadiazole central core unit, fluoro-substituted electron-withdrawing end groups and an aromatic ring connecting unit, wherein the fused ring benzothiadiazole central core is of a nitrogen bridge trapezoidal fused ring structure, the fluoro-substituted electron-withdrawing end groups are connected to the two ends of the central core, and each acceptor unit is in conjugate connection through a simple aromatic ring structure.

The invention which relates to a preparation method of dibenzoylmethane and an application of dibenzoylmethane in the molding processing of a thermoplastic resin belongs to a preparation of compounds containing a CO group and only connected with a carbon atom or a hydrogen atom, and especially relates to a preparation of a beta-dione. The preparation method is characterized in that: dibenzoylmethane is prepared by carrying out a condensation reaction on methyl benzoate and acetophenone in an alkaline environment, methyl benzoate is prepared by esterifying raw materials of benzoic acid and methanol with sulfuric acid as a catalyst, and the preparation method comprises two steps of the synthesis of methyl benzoate and the preparation of dibenzoylmethane. The preparation method of dibenzoylmethane provided in the invention has the advantages of low raw material cost, short condensation reaction period, less byproduct, high dibenzoylmethane yield, complete solvent recovery, and excellent improvement of photo-thermal stabilities of the thermoplastic resin. The condensation yield is 85%, and the crystallization yield is 95%. The invention provides dibenzoylmethane prepared through the preparation method and an application method of dibenzoylmethane in the molding processing of the thermoplastic resin.

This invention relates to short wavelength metal-chelate-alpha-(4-substituted-2-azothiazolcyclo)-beta-(4,4- dimethyl cyclohexadione) metal chelate with its structural formula as shown, where, C=carbon, N=nitrogen, R=alkyl, methyl, 1-4 carbon linear branched chain alkyl with t-butyl; M2+=Ni2+, Zn2+, Cu2+. This invention compound adsorbs short wavelength (400-500 nm), has solubility being not less than 3 wt% in much organic solvent, being suitable for forming membrane with rotating coating method with high stability, being matched with blue-green laser in working wavelength of 450-550 nm, being of organic storage medium of high thickness blue-green light recording-disc.

The invention discloses a cold-resistant plastic bucket and a preparation method thereof, and belongs to the technical field of a plastic packaging container. The cold-resistant plastic bucket is characterized in that the cold-resistant plastic bucket is prepared from the components in parts by weight: 60 to 80 parts of high-density polyethylene, 15 to 25 parts of linear low-density polyethylene,10 to 20 parts of maleic anhydride grafted high-density polyethylene, 5 to 7 parts of high-polymerization-degree polyvinyl chloride, 6 to 8 parts of ethylene-vinyl acetate copolymer, 0.5 to 1.0 part of ultraviolet absorption agent, 1 to 1.5 parts of antioxidant, 2 to 3 parts of plasticizer and 5 to 7 parts of silica power; the high-density polyethylene has a density of 0.936 g/cm<3> and a melt index of 1.4 g/10 min; the linear low-density polyethylene has a density of 0.920 g/cm<3> and a melt index of 1.0 g/10 min. The invention reaches the technical effect of enabling the polyethylene plasticbucket to also have excellent printing performance when having cold resistance.

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.