40 results about "Phospholenes" patented technology

Disclosed are a macrocyclic carbodiimide (MC-CDI) and a process for synthesizing the same through condensation of a molecule with multiple-isocyanate terminal functional groups under high dilution in the presence of a phospholene catalyst such as phospholene or arsenic catalyst. Also disclosed are MC-CDI derivatives, such as MC-urea (MC-U), MC-acylurea (MC-ACU), acid functionalized MC-ACU, and anhydride functionalized MC-ACU, processes for synthesizing the same, and the applications of such derivatives as hydrolysis stabilizers in organic polymeric materials, such as polyurethane (PU) and polyesters, as well as the applications in the syntheses of the amide- and imide-modified polyurethane by ring-opening reaction of the MC-ACU.

A flexible polyurethane foam article exhibiting flame resistance comprises the reaction product of an isocyanate and an isocyanate-reactive component comprising a polyol reactive with the isocyanate. The isocyanate and the isocyanate-reactive component are reacted in the presence of a blowing agent and a phospholene oxide. A method of producing the flexible polyurethane foam article includes the step of reacting the isocyanate and the isocyanate-reactive component in the presence of the blowing agent and an effective amount of the phospholene oxide to form the flexible polyurethane foam article which is flame resistant.

A proppant comprises a particle and a polycarbodiimide coating disposed on the particle. The polycarbodiimide coating comprises the reaction product of an isocyanate reacted in the presence of a phospholene oxide catalyst. A method of forming the proppant comprises the steps of providing the particle, providing the isocyanate, providing the phospholene oxide catalyst, reacting the isocyanate in the presence of the phospholene oxide catalyst to form the polycarbodiimide coating, and coating the particle with the polycarbodiimide coating.

The invention relates to a preparation method of two-dimensional crystal black phosphorene. A preparation method of two-dimensional crystal black phosphorene, which is characterized in that it comprises the following preparation steps: taking red phosphorus, silver zinc oxide and tin tetraiodide for subsequent use; taking red phosphorus, silver zinc oxide and tin tetraiodide and fully mixing them, Sealed together in a quartz tube with an inner diameter of 10mm, placed in a single-temperature zone furnace to raise the temperature to 400-800°C and keep the temperature constant for 15-40h; the preparation method of the two-dimensional crystal black phosphorene of the present invention has simple preparation process, mild conditions, High Yield.

A rigid foam having increased flame retardance comprises the reaction product of an isocyanate component and an isocyanate-reactive component. The isocyanate component and an isocyanate-reactive component are reacted in the presence of an isocyanurate catalyst component and a carbodiimide catalyst component. The isocyanurate catalyst component comprises 1,3,5-tris(3-(dimethylamino)propyl)-hexahydro-s-triazine and the carbodiimide catalyst component comprises 3-methyl-1-phenyl-2-phospholene-1-oxide. A method of forming the rigid foam on a surface comprises the steps of providing the isocyanate component, providing the isocyanate-reactive component, providing the isocyanurate catalyst component, providing the carbodiimide catalyst component, and spraying the isocyanate component, isocyanate-reactive component, isocyanurate catalyst component, and carbodiimide catalyst component onto the surface to form the rigid foam on the surface.

The invention discloses a preparation method of a phosphorene-functional-modified 3D-print polylactic acid bionic nanofiber support and aims to provide a multifunctional support material for repairing bone defects and a preparation method thereof. The preparation method is characterized by comprising the following steps: loading an anti-inflammatory drug ibuprofen onto nano flaky phosphorene prepared by a liquid-phase stripping method, and coating the surface of the phosphorene with a polydopamine coating, so as to realize intelligent controlled release of the drug; and uniformly doping the obtained drug-loaded phosphorene into an amination-modified polylactic acid matrix to obtain a size mixture, constructing a personalized support by adopting a low-temperature 3D printing technology, and enabling the support to be subjected to phase separation under a low-temperature printing condition so as to form a reticular nanofiber structure of a bionic extracellular matrix. The preparation method has the characteristics that the prepared support can be subjected to personalized designing according to characteristics of a bone defect part of a patient, and the prepared support has good actions of cellular affinity, photothermal conversion performance, bone growth promotion, intelligent drug release and long-acting inflammation resisting and has potential application prospects in the field of bone tissue engineering.

The invention discloses an MXene black phosphorene composite sponge and a preparation method thereof. The MXene black phosphorene composite sponge has a three-dimensional macrostructure, has a continuous three-dimensional porous structure inside, contains micropores, mesopores and macropores, and has a specific surface area of 3-500 m<2>/g and conductivity of 0.01-1000 S/cm. The preparation methodcomprises the following steps: adding black phosphorene into an MXene dispersion under the protection of inert gas, uniformly dispersing, adding a cross-linking agent, standing, molding, carrying outsolution replacement, and carrying out circulating freeze-drying treatment to obtain the MXene black phosphorene composite sponge material. The MXene black phosphorene composite sponge provided by the invention has the advantages of high conductivity, high strength, high specific surface area and excellent photoelectric properties, and has wide application prospects in the fields of electronic information, energy environments and the like.

The invention relates to a preparation method of phospholene oxide, substituted phospholene oxide and a preparation method of the substituted phospholene oxide and belongs to the technical field of organic synthesis. The preparation method of the phospholene oxide comprises the following steps: 1) enabling phosphorus trihalide and chloroethanol to react at -10 to 40 DEG C for 0.5 to 3h so as to obtain a compound shown as a formula I; 2) enabling the compound shown as the formula I, a catalyst, a polymerization inhibitor and 1,3-butadiene to react at room temperature for 4 to 10h; then raisingthe temperature to 40 to 80 DEG C and reacting for 12 to 24h; then raising the temperature to 80 to 100 DEG C and reacting for 8 to 14h to obtain the phospholene oxide. The e preparation method of thephospholene oxide, provided by the invention, takes the phosphorus halide and the chloroethanol as raw materials, and the raw materials are easy to obtain and the price is low; reaction conditions are moderate and the method is simple and feasible and is low-cost.

The invention discloses a preparation method of a nucleophilic phosphorene compound, and belongs to the field of chemical medicine preparation. Phosphorene (RP) is a monovalent phosphorus compound with a six-electron structure. As a phosphorus analogue of carbene, phosphorene is always an important organophosphorus reagent. Due to the instability of free phosphorene, chemists synthesize Lewis acidand Lewis alkali complexes of phosphorene by utilizing the dual characteristics of phosphorene molecules. The two types of complexed phosphorene are higher in stability and easier to regulate and control in reactivity, especially nucleophilic phosphorene coordinated by Lewis alkali. According to the invention, the nucleophilic phosphorene compound can be obtained with high yield by using the hydride of precursor phosphorus to react with alkali at low temperature in the presence of crown ether/cryptand. The obtained target product can be used as a catalyst for various catalytic reactions.

The present invention provides novel cyclic phosphorus-containing compounds, namely hydroxyl-functional phospholene-1-oxides, serving as highly efficient reactive flame retardants in urethane systems, particularly in flexible polyurethane foams, semi-rigid and rigid polyurethane and polyisocyanurate foams. The invention further provides fire-retarded polyurethane compositions comprising said hydroxyl-functional phospholene-1-oxides.

The invention discloses a nitrogen-doped phosphorene quantum dot and a preparation method thereof. The preparation method comprises the steps that red phosphorus, a cyanamide compound and a catalyst are mixed and heated, and a nitrogen-doped black phosphorus material is generated through a reaction; the nitrogen-doped black phosphorus material is ground into powder, a dispersion medium and sulfonate containing trivalent rare earth elements are added, and ultrasonic treatment is carried out to obtain an ultrasonic dispersion liquid; the ultrasonic dispersion liquid is centrifuged, and the nitrogen-doped phosphorene quantum dots are prepared. According to the nitrogen-doped phosphorene quantum dot, the nitride with the layered structure is doped in the black phosphorus material, so that the prepared nitrogen-doped phosphorene quantum dot has relatively high polarity, nitrogen atoms in the nitrogen-doped phosphorene quantum dot can generate hydrogen bond interaction with hydrogen atoms in water, and the nitrogen-doped quantum dot has relatively high water solubility compared with the phosphorene quantum dot; therefore, agglomeration of the nitrogen-doped phosphorene quantum dots in a water solvent can be effectively avoided, and the nitrogen-doped phosphorene quantum dots are easy to disperse after being dried.

The invention relates to the technical field of flame retardants, in particular to a preparation method of a novel phosphorus-nitrogen flame retardant, which comprises the following steps: step 1, mixing and ball-milling black phosphorus crystals and amine substances in an inert atmosphere; 2, transferring a ball-milled product obtained in the step 1 into a centrifugal tube by using a polar solvent, carrying out centrifugal treatment, then collecting an upper-layer suspension, continuously centrifuging, collecting a lower-layer precipitate, and drying, so as to obtain an amino-grafted phosphorene nanosheet; 3, melamine is dissolved in deionized water, a formaldehyde solution is slowly added under the heating condition, the pH is adjusted to be alkaline, a reaction is conducted, and a melamine-formaldehyde prepolymer is obtained; and 4, adding the amino-grafted phosphorene nanosheet prepared in the step 2 into the melamine-formaldehyde prepolymer prepared in the step 3, mixing, dispersing, filtering, and drying in vacuum to obtain the novel phosphorus-nitrogen flame retardant.

The present invention provides novel cyclic phosphorus-containing compounds, namely hydroxyl-functional phospholene-1-oxides, serving as highly efficient reactive flame retardants in urethane systems, particularly in flexible polyurethane foams, rigid polyurethane foams and rigid polyisocyanurate foams. The invention further provides fire-retarded polyurethane compositions comprising said hydroxyl-functional phospholene-1-oxides.

The invention relates to the technical field of hard alloys, in particular to a high-hardness and high-toughness hard alloy and a preparation method thereof. The high-hardness and high-toughness hard alloy is prepared from 60-95 wt% of WC powder, 5-10 wt% of Co powder, 2-5 wt% of Ni powder and 0.1-1 wt% of phosphorene. The preparation method comprises the steps that WC powder, Co powder, Ni powder and phosphorene are mixed and added into absolute ethyl alcohol, dried mixed powder is obtained through ultrasonic treatment, vacuum drying and stoving, then the mixed powder is placed in spark plasma sintering equipment to be sintered, and the corresponding high-hardness and high-toughness hard alloy is obtained. The hard alloy with high hardness and high toughness is obtained by modifying the hard alloy, and the hard alloy has excellent application prospects.