57results about How to "High thermal and chemical stability" patented technology

The invention relates to an electrically-conducting paint, more specifically to a two-component aqueous polyurethane electrically-conducting paint and its preparation method. The electrically-conducting paint is prepared by the following steps of: firstly, preparing a polypyrrole/attapulgite nanometer conducting composite material; then, dispersing the obtained conducting composite material into an aqueous hydroxyl acrylic emulsion; and finally adding various auxiliary agents and hydrophilic modified polyisocyanates to obtain the two-component aqueous polyurethane electrically-conducting paint. The preparation method provided by the invention has a simple process; in addition, the product has high cost performance and is environmentally friendly.

The present invention provides carbon nanotube coated fabric compositions for the purpose tuning the optical properties of fabric, in particular the optical transmittance, absorption, and reflectance in the visible, NIR and mid-IR ranges. The carbon nanotube coated fabrics of the present invention exhibit relatively uniform absorptivity and reflectivity of light across visible and IR spectral ranges and are ideal for use in stealth operations for counteracting night vision detection devices. The carbon nanotube coatings are thin, flexible coatings exhibiting high thermal and chemical stability, strong adhesion, low weight, and high tensile strength. In one embodiment, the composition includes an insulator layer for thermally isolating the CNT coating and establishing thermal equilibrium with the surrounding environment through the absorption of thermal IR emitted from hot objects. Processes for preparing the carbon nanotube coated fabrics are also described herein.

This invention relates to a method of using hydrosilylation reaction to synthesize silicon compound. It needs to solve the technical problem that provides a hydrosilylation reaction method taking ionic liquids of room temperature as the reaction medium and transition metal complexes Rh (PPh3) 3Cl as the main catalyst. The greatest strength is that it can improve the catalytic activity of Rh (PPh3) 3Cl and increase selectivity of beta adduct in the ionic liquid at room temperature. At the same time, when the reaction ends, cooling and settling make the catalyst/ionic liquid and products separate, and the catalyst/ionic liquid can be recycled.

A cooling system is adapted for reduction of evaporative loss of a liquid coolant and for efficient cooling of plural electronic devices densely accommodated in a cooling bath of a small volume. A cooling system accommodates plural electronic devices in an open space of a cooling bath provided with an inlet port and an outlet port for a liquid coolant. The cooling system is configured to directly cool the electronic devices by immersion of the electronic devices in the liquid coolant circulated in the open space. The liquid coolant contains a perfluorinated compound as a main component. The liquid coolant is adapted to exhibit a liquid weight loss percentage of 1.5% or less as determined by allowing 10 ml of the liquid coolant in a 10-ml measuring cylinder (opening diameter: 11.5 mm) to spontaneously evaporate under normal environment at a room temperature of 25° C. for 100 hours.

A compound is provided which is represented by the following general formula (I) or (II) as shown in the description, wherein X is selected from CR4 or N; R1 to R4 are each independently selected fromhydrogen, C1-C10 alkyl, substituted or unsubstituted C5-C60 aryl or heteroaryl, the aryl or heteroaryl substituent is selected from deuterium, fluorine, methyl, methoxy, cyano, phenyl, biphenyl, naphthyl, phenanthrenyl, pyridyl, furanyl, thienyl, indenyl, benzofuranyl, benzothienyl, substituted or unsubstituted indolyl, dibenzofuranyl, dibenzothienyl, substituted or unsubstituted carbazolyl, benzocarbazolyl, dibenzocarbazolyl, and the indolyl and carbazolyl substituents are selected from phenyl, biphenyl, naphthyl, phenanthrene. The dashed line and Cy in the general formula (II) represent a five-membered or six-membered aromatic ring or an aromatic heterocycle fused with a pyrimidine ring. The compound can be used in organic electroluminescence devices. The invention also provides an organic electroluminescence device comprising the compound.

The invention discloses a preparation method of conductive coatings for communication equipment. The method comprises the following steps: a, adding water-soluble resin, water-based dispersant, deionized water, graphene and graphite into a ball mill at a constant temperature under normal pressure for mixing and ball-milling to obtain a mixture 1; b, adding a doping agent, a curing agent and an aminosilane coupling agent into the mixture 1 and evenly mixing, pouring into a stirrer to be fully stirred and mixed, then carrying out dispersion treatment by using a three-roller milling machine, grinding by using the three-roller milling machine, and sieving to obtain a mixture 2; c, adding an antifoaming agent, a leveling agent and a thickening agent into the mixture 2, and fully stirring and mixing to obtain a final product. The preparation method disclosed by the invention is simple in process, and the product has the advantages of high price-quality ratio, environment protection and the like.

The invention discloses a quinazoline triazole derivative as shown in formula (1) and application thereof in organic light-emitting materials. The quinazoline triazole derivative is high in glass-transition temperature, high in melting point and high in carrier transport and light-emitting efficiency. An organic electroluminescence device which is low in drive voltage and high in light-emitting efficiency is obtained by applying the quinazoline triazole derivative to a host material using an organic light-emitting functional layer as the light-emitting layer.

The invention provides a silica nitride fluorescent powder. A general formula of the fluorescent powder is BaeCfDgSi3+a(Al, Ga, In) 3+bO4+cN5+d, wherein a is more than -2 and less than 2; b is more than -2 and less than 2; c is more than -2 and less than 2; d is more than -2 and less than 2; f is not less than 0 and not more than 0.30; g is not less than 0 and not more than 0.5; the sum of 2e+fvC+gvD is 2; e is more than 0; vC and vD represent valence states of C and D; C is a light emitting center of one or more elements selected from Ce (Cerium), Pr (praseodymium), Nd (Neodymium), Sm (Samarium), Eu (Europium), Gd (Gadolinium), Tb (Terbium), Dy (Dysprosium), Ho (Holmium), Er (Erbium), Tm (Thulium), Yb (Ytterbium), Mn (Manganese), Cr (Chromium), Bi (Bismuth), Pb (Plumbum) and Fe (Ferrum); and D is a mixture of one or more elements selected from alkaline-earth metals and Zn (Zinc) except for Ba (Barium). The silica nitride fluorescent powder provided by the invention has the advantages of small brightness reduction while being exposed in an excitation source, excellent conversion efficiency to blue light or near ultraviolet, excellent color purity, thermal stability, high chemical stability, small and uniform crystallite dimension, low calcining temperature, simple process, easiness for continuous industrial production and broad industrial application prospect.

The invention belongs to the technical field of fuel cells and electrolytic cells, and discloses a composite electrode for medium and low temperature proton conductor solid oxide cell and a preparation method of the composite electrode. According to the composite electrode for the medium and low temperature proton conductor solid oxide cell, a proton conductor oxide of an A-site defect is heated and reduced in a hydrogen atmosphere; nanometal particles are obtained through in-situ growth on the proton conductor oxide; and the nanometal particles and the proton conductor oxide form the composite electrode. The composite electrode for the medium and low temperature proton conductor solid oxide cell has excellent thermal stability and catalytic activity, can be applied to a solid oxide fuel cell or a solid oxide electrolysis cell, has a relatively low operation temperature, and has actual application value. The nanometal particles in the electrode can be prepared in situ under the condition of a reducing atmosphere, and can go back to crystal lattices of the proton conductor oxide under the condition of an oxidizing atmosphere, so that a nanometal particle catalyst in the electrode is renewable to a certain extent.

The invention discloses a metal complex and an OLED (Organic Light Emitting Device) thereof, and relates to the technical field of organic photoelectric materials. The metal complex has a structure asshown in a formula (I), wherein an electron-rich dinitrogen coordination structure in the structure of the metal complex is beneficial for stabilizing central trivalent metal cations, and meanwhile,electron cloud distribution on metal iridium can also be affected, so that great influence to the photoelectric properties of a whole complex molecule can be generated; a quaternary ring formed by a ligand of the dinitrogen coordination structure and metal has stronger rigidity and is beneficial for reducing unnecessary vibration energy loss and realizing high-efficiency luminescence property. Byregulating substituent groups, the metal complex has better thermal stability and chemical property; by preparing the metal complex into a device and particularly using the metal complex as a doping material, the device has the advantages of low driving voltage and high luminous efficiency and is superior to a commonly used OLED.

The invention discloses an application of myricetin in preparation of a protective preparation resisting doxorubicin-induced cardiotoxicity and also discloses protective microcapsules resisting doxorubicin-induced cardiotoxicity. The protective preparation resisting doxorubicin-induced cardiotoxicity has the beneficial effects as follows: the preparation has quite high oxygen free radical scavenging capability, lipid peroxidation of the myocardial cell membrane and damage of myocardial mitochondrial DNA are prevented, and apoptosis of myocardial cells can be obviously reduced; the prepared microcapsules have higher thermal and chemical stability, and can better resist chemical disturbance in biological microenvironments.

The invention relates to an amine derivative containing a spirofluorene group and an application thereof in an organic electroluminescent device, and belongs to the technical field of organic photoelectric materials and devices. The molecular structure of the derivative is shown in the specification, and the derivative can be used for preparing a hole transport layer of an organic light-emitting diode (OLED). An organic light-emitting device prepared by adopting the amine derivative as a hole transport material has the advantages of high brightness, high efficiency and good stability, and theperformance of the OLED device is effectively improved.

The invention relates to a manufacturing method for a mite-proof polyethylene light conveyer belt. The method sequentially comprises the following steps of: adding water into a mite-proof agent to prepare mite-proof treatment solution; soaking a polyester fabric into the mite-proof treatment solution, drying and determining the nature to prepare a mite-proof treated polyester fabric; crushing polyethylene granules, sieving, mixing the powder and the mite-proof agent, and blending and granulating the mixture through a double-screw extruder to prepare mite-proof modified polyethylene (PE) granules, wherein the mass content of the mite-proof agent is 2 to 5 percent; and compounding the mite-proof modified PE material and the mite-proof treated polyester fabric by using an extrusion calendering process, keeping the extrusion temperature at 130 to 150 DEG C, and keeping the surface temperature of the mite-proof treated polyester fabric at 120 to 150 DEG C; and cooling the conveyer belt to room temperature. The invention has the advantages that: the mite-proof agent can kill mites and inhibit reproduction of the mites, has no harm to the human body, and has high chemical stability and thermal stability; the mite-proof agent has good compatibility with PE, and does not influence the machining property and other mechanical properties of the PE light conveyer belt; and the method totally accords with the food hygienic standard of American FDA and the laws and regulations of European Union REACH.

A titanium doped ternary system silicate film is provided, wherein the titanium doped ternary system silicate film has the general formula, of Ca_2-xMgSi₂O₇:xTi⁴⁺, where x has a value of 0.00017˜0.0256. The preparation method of the titanium doped tenuity system silicate film and the application of the titanium doped ternary system ,silicate film obtained by the method in field emission de ices cathode my tubes and/or electroluminescent devices are also provided.

The invention discloses a preparation method of zinc-containing antibacterial gel. The preparation method of the zinc-containing antibacterial gel comprises the following steps: step 1, selecting a zinc-containing compound and white carbon black at a certain weight ratio, uniformly mixing and then calcining for 2 hours at high temperature, cooling and then sieving to obtain Si-Zn powder; step 2, mixing carbomer, purified water, KOH, menthyl lactate, propanediol and Si-Zn powder in proportion, and homogenizing to obtain the zinc-containing antibacterial gel. The Si-Zn compound which is calcinedat high temperature is a zinc-containing antibacterial gel with single antibacterial factors, and the prepared antibacterial gel has the following characteristics of inorganic antibacterial agent: sterilization spectrum, heat resistance, safety, durability, zero drug resistance and the like, and has specific non-toxicity, non-migration and abilities of absorbing and scattering ultraviolet rays ofzinc oxide, the antibacterial gel is good in stability after being stored at the temperature of 54 DEG C and being illuminated by sunlight for two months, the antibacterial performance does not change, and thermal stability and chemical stability are high.

The invention discloses a silicon-carbon composite negative electrode material and a preparation method and application thereof. The invention belongs to the technical field of lithium ion battery negative electrode materials, and particularly discloses a nitrogen-rich graphite nanosheet/nano-silicon composite material which comprises a nitrogen-rich graphite nanosheet with a two-dimensional structure and nano-silicon particles uniformly compounded on the surface of the nitrogen-rich graphite nanosheet in situ. Besides, the invention further provides preparation of the material, a CN source isused as a precursor, two-stage treatment is performed in an oxygen-containing atmosphere, then silicon is loaded and mixed with a metal reducing agent and compound salt, and two-stage gradient reduction is performed in an inert atmosphere. Research finds that the structural stability can be effectively improved and the electrochemical performance of the material can be improved due to the synergistic effect between the components and the morphological characteristics of the material.

The invention relates to a preparation method, performance and application of novel green light-emitting material terbium lead multi-borate. The novel green light-emitting material terbium lead multi-borate is characterized in that the molecular formula of the novel green light-emitting material terbium lead multi-borate is PbTbB7O13, the compound belongs to the monoclinic system, non-center space group is P21, and unit parameters are a=7.7676(8) angstrom, b=9.0824(10) angstrom and c=13.2535(14) angstrom. The compound comprises a BO3 plane triangle and a BO4 tetrahedron and is characterized in that the BO3 plane triangle and the BO4 tetrahedron are connected by sharing vertex oxygen atoms to form a complex two-dimensional anion framework network structure recorded as [B7O13]<5->8, and Pb<2+> and Tb<3+> are distributed in and among the anion layers of B7O13]<5->8 and connected with the anion layers through ionic bond action so as balance charge and support the framework. The PbTbB7O13 can emit bright green fluorescent light under near ultraviolet excitation and can be used as green fluorescent powder to be applied to the technical field of fluorescent light-emitting materials. The excitation spectrum of the PbTbB7O13 covers a wide waveband ranging from 330 nanometers to 380 nanometers, so that the PbTbB7O13 can be effectively excited by near ultraviolet and is suitable for being used as the fluorescent powder to be applied to near ultraviolet LED lighting devices.

The invention belongs to the field of organic functional materials, and particularly relates to a heteropolycyle compound having photo-activity and a preparation method thereof, wherein the structureof the compound is represented as the formula (I). The heteropolycyle compound in the invention has excellent photo-activity, wherein the compound has a large specific surface area due to the heteropolycyle structure, so that oxygen inhibition is effectively overcome. The compound, used for initiating polymerization of a monomer, is high in conversion rate. The preparation method is gentle in reaction conditions, wherein the reactions are carried out under normal pressure, so that the method is simple in operation; the method employs accessible raw materials, is low in cost, is environment-friendly and pollution-free, and is suitable for large-scale industrial production.

The invention relates to the technical field of novel material processing, and discloses a method for improving the corrosion resistance of the surface of a power distribution cabinet. According to the method provided by the invention, the principle of electrochemical corrosion and the change law of the physical and chemical properties of a corrosive scale layer are studied, in the preparation process of a protective coating, a layered polymetallic material is prepared by using lanthanum oxide as a raw material and an atom with a special electronic structure as a center and utilizing magnesiumions and metaaluminate radicals, the layered polymetallic material is subjected to organic structural modification to form a composite system, the composite system is added into an epoxy resin coating, the obtained anticorrosive coating coats the power distribution cabinet, so that the thermal stability and chemical stability of the metal material are improved, the free energy is a positive value, liquid phase transmission is prevented, and progress of corrosion is inhibited; and in the mass transfer process, resistance is set in an adsorption, charge transfer and electrochemical reaction tolimit an electrode reaction in the electrochemical reaction, so that electrochemical corrosion is effectively inhibited, the power distribution cabinet has excellent corrosion resistance in harsh working environments, and the safety and service life of the power distribution cabinet are improved.

The invention provides a method for preparing an adsorbent for 2-mercaptobenzothiazole purification. The method includes the steps that a certain amount of styrene is dispersed in water; dicyclopentadienyl, pentamethylcyclopentadienyltitanium trimethoxide, potassium persulfate and sodium dodecyl benzene sulfonate, 1,5,7-triazabicyclo[4.4.0]dec-5-ene and benzyl vinyl ether are added according to the proportion, heating is conducted, reaction is conducted at proper temperature and pressure, a product is filtered and dried after reaction, and the adsorbent for 2-mercaptobenzothiazole purification is obtained.

The invention discloses a preparation method of a sulfur-doped TiO2 film for a water purification system of a construction site, and belongs to the technical field of water environment treatment. The preparation method comprises the steps of S1, synthesis of sol, specifically, adopting a non-sulfurized hydrocarbon surfactant self-assembled sol-gel process as a pore orientation agent, and taking sulfuric acid as a precursor for preparing sulfur and water; S2, preparation of a sulfur-doped TiO2 film, specifically, preparing the sulfur-doped TiO2 film by using borosilicate glass as a substrate; S3, measuring the characteristics of the synthesized sulfur-doped TiO2 film by adopting an X-ray diffractometer to determine the crystal structure of the synthesized sulfur-doped TiO2 film; and S4, evaluating the photocatalytic activity of MC-LR under visible light irradiation, specifically, preparing a solution in a reactor, and then adding the sulfur-doped TiO2 film. The sulfur-doped TiO2 film has the advantages of high thermal and chemical stability, relatively high photocatalytic activity, low toxicity, low cost and the like.

The invention discloses a benzo-phenanthroline derivative and application thereof in the technical field of preparing organic light-emitting-diode displays and illuminating. The invention further provides an organic light-emitting device. The device comprises the benzo-phenanthroline derivative. Compared with the conventional organic light-emitting device, the organic light-emitting device disclosed by the invention has the advantages of better light emitting performance, lower voltage drive, lower electric consumption and longer life.

A method of using an absorber of electromagnetic radiation, includes absorbing electromagnetic radiation with the absorber finely distributed or dissolved in a carrier material. The absorber is a crystal water-free iron(II) orthophosphate of the general formula Fe₃(PO₄)₂ or crystal water-free iron(II) metal orthophosphate, iron(II) metal phosphonate, iron(II) metal pyrophosphate or iron(II) metal metaphosphate of the general formula Fe_aMet_b(PO_c)_d, where a is a number from 1 to 5, b is a number from >0 to 5, c is a number from 2.5 to 5, d is a number from 0.5 to 3 and Met represents one or more metals selected from the group consisting of Li, Na, K, Rb, Cs, Mg, Ca, Sr, Ba, the transition metals (d block), the metals and semimetals of the third, fourth and fifth main groups, and the lanthanoids or combinations of the above mentioned phosphates as absorbers of electromagnetic radiation.

The invention provides an isolating membrane, a preparation method thereof, a lithium ion secondary battery and a device. The isolating membrane provided by the invention comprises a porous base membrane and a functional coating arranged on at least one surface of the porous base membrane. The functional coating comprises polyimide nanosheets, and the polyimide nanosheets are irregularly stacked to form a lamellar loose structure. The thickness ratio of the functional coating to the porous base membrane is 0.1 to 1.0. The invention further provides the preparation method of the isolating membrane, the lithium ion secondary battery comprising the isolating membrane and a device. The isolating membrane provided by the invention has relatively good thermal stability and chemical stability, can effectively resist mechanical puncture of lithium dendrites, avoids micro short circuit, and improves the cycle performance of the battery.