57 results about "Poly(phosphazene)" patented technology

The invention discloses a method for preparing a flame-retardant waterborne polyurethane coating. Under the action of a dibutyltin dilaurate catalyst, 10-(2,5-dihydroxyphenyl)-9,10-dihydro-9-oxo Mix hetero-10-phosphophenanthrene-10-oxide with hexamethylene diisocyanate, react at 90~110°C for 1~4h, then add nitrogen and phosphorus compounds to the reaction system, reaction temperature 70~110°C, reaction time 30 ~60min to obtain polyurethane prepolymer; add chain extender and methyl ethyl ketone solvent to polyurethane prepolymer, react at 60~85℃ for 2? ~5h, add triethylamine for neutralization reaction for 20~40min, add water for emulsification to form a water-based polyurethane; mix manganese salt dispersion, 5-hydroxytryptophan, hexachlorocyclotrimeric phosphazene and γ-diethylene Add triaminopropylmethyl dimethoxysilane to polyurethane, and shear and stir for 30-80 minutes under the condition of pH 7 to obtain flame-retardant water-based polyurethane coating. The flame retardancy and mechanical properties of the obtained polyurethane are greatly improved.

The invention discloses a dendritic UPy damper as well as its preparation method and application. The dendritic UPy damper is obtained by reacting an isocyanate-terminated dendrimer with 6-methylisocytosine, and the isocyanate-terminated dendrimer is obtained by reacting an amino-terminated dendrimer with 1,6 It is obtained by the reaction of hexamethylene diisocyanate, and the amino-terminated dendrimer is obtained by reacting a dendrimer with a chlorine atom at the end with 1,6-hexanediamine, and the dendrimer with a chlorine atom at the end It is obtained by the reaction of hexachlorotrimeric phosphazene and ethylene glycol with 1,6-hexanediamine and hexachlorotrimeric phosphazene alternately. Experiments show that: the dendritic UPy damping agent of the present invention can be uniformly dispersed in the chlorinated butyl rubber matrix, and can significantly improve the damping performance, heat resistance, mechanical properties, and wear resistance of the obtained chlorinated butyl damping rubber composite material. performance and high temperature damping temperature range.

The invention relates to the technical field of lithium batteries, and provides a polyphosphazene composite flame-retardant additive for lithium battery electrolyte and a preparation method thereof. In this method, chain-like polydichlorophosphazene is obtained by ring-opening polymerization of hexachlorocyclotriphosphazene; then tetramethoxysilane is used for substitution reaction to obtain polybis(trimethoxysilyloxy)phosphazene; Hydrolysis to obtain polybis(trihydroxysiloxy)phosphazene; finally, through the reaction of magnesium chloride and sodium hydroxide, nano-sized magnesium hydroxide is generated and precipitated on the surface of polybis(trihydroxysiloxy)phosphazene, and carried out Dehydration condensation, made polyphosphazene composite flame retardant additive. Compared with the traditional method, the flame retardant additive prepared by the invention can not only make the lithium battery have good flame retardant performance, but also improve the conductivity of the electrolyte.

The invention belongs to the field of potassium ion batteries, and discloses a preparation method and application of an ultra-long cycle polyatom-doped hollow carbon electrode material. The invention adopts magnesium oxide particles, hexachlorocyclotripolyphosphazene and dihydroxydiphenylsulfone to prepare magnesium oxide-polycyclotriphosphazene-dihydroxydiphenylsulfone composite material, and after calcining and removing magnesium oxide template, nitrogen and phosphorus are obtained Sulfur polyatom co-doped hollow carbon, that is, ultra-long cycle polyatom-doped hollow carbon electrode material. The synthesis method of the ultra-long-cycle polyatom-doped hollow carbon electrode material is simple, the specific surface area is large, and it has a cross-linked structure and abundant defects and active sites. Rate capability and cycling stability.

The invention discloses a method for preparing a polyphosphazene-based hydrogel wound dressing with antibacterial and wet surface adhesion properties. The hydrogel wound dressing of the invention is prepared by forming a borate ester bond between hydrophilic polyphosphazene containing phenylboronic acid functional groups and polyvinyl alcohol. The hydrogel wound dressing of the present invention realizes passive contact antibacterial through abundant tertiary amine and quaternary ammonium salt functional groups in the cross-linked skeleton. The polyvinyl alcohol segment can provide a large number of hydrogen bonds and cooperate with the "cation-π" structure in the hydrogel backbone to provide wet surface adhesion properties. The invention can achieve the purpose of antibacterial and wet surface adhesion, has good biocompatibility and self-healing performance, and can promote wound healing.

The invention discloses a nitrogen, phosphorus and sulfur heteroatom co-doped carbon-based adsorbent. The adsorbent adopts silica as the template, with the assistance of triethylamine, hexachlorotriphosphazene and bisphenol S polymerize into highly crosslinked polycyclotriphosphazene-4, 4'-dihydroxy diphenyl sulfone. By means of a carbonization process in an inert atmosphere, a nitrogen, phosphorus and sulfur heteroatom co-doped carbon-based material can be formed, wherein the carbon content is 85-90%, the oxygen content is 8.0-11%, the nitrogen content is 1.0-2.0%, the phosphorus content is 0.5-1.0%, and the sulfur content is 0.5-1.0%. The adsorbent has good adsorption activity on radionuclides, organic pollutants and other harmful substances in a water environment like uranyl, methyleneblue, bisphenol A, etc., also has the characteristics of wide application pH range, low cost, environmental friendliness, easy recovery and reusability, thus having good application prospects.

The invention relates to a substituted imidazole unit loaded alkali-resistant anion exchange membrane and a preparation method of the alkali-resistant anion exchange membrane, and belongs to the technical field of anion exchange membranes for fuel cells. A structural formula is as shown in the specification; R1 is aryl or one of C1-C8 alkyl; R2 is aryl or C1-C8 alkyl; R3 is C1-C8 alkyl; R4 is anyone of C1-C8 alkyl; R5 is any one of C1-C18 alkyl; and n is a degree of polymerization of polyphosphazene. The method comprises the steps of adopting imidazole containing different substituent groupsand polydichlorophosphazene for reaction to form a novel substituted imidazole unit loaded polyphosphazene material, and performing membrane forming and ion exchange to form the alkaline anion exchange membrane. The substituted imidazole unit loaded alkali-resistant anion exchange membrane does not involve in the problems of Hofmann degradation, Ei elimination, nucleophilic substitution and the like of the conventional quaternary ammonium anion exchange membrane; the degradation problem in a high temperature strongly alkaline environment is avoided; and the anion exchange membrane has the characteristics of high ion conductivity and excellent alkali resistance.

The invention discloses a halogen-free red phosphorus-free flame-retardant heat shrinkage material, a heat shrinkage tube and a preparation method and application. The heat shrinkage material comprises the following raw materials: 100 parts of polymer base materials including ethylene-vinyl acetate copolymer and ethylene-ethyl acrylate copolymer in radiation grafting with maleic anhydride, 120-160 parts of inorganic flame retardant including magnesium hydroxide, 15-30 parts of polyphosphazene flame retardant including hexaphenoxy cyclotriphosphazene, 15-30 parts of nitrogen flame retardant including melamine cyanurate, 4-8 parts of composite antioxidants including a main antioxidant, an auxiliary antioxidant and an ultraviolet light absorber, 5-15 parts of anti-radiation agents including high-phenyl silicon rubber and anti-radiation agent A, and 6-12 parts of processing aids including a crosslinking sensitizer and a lubricant, wherein the anti-radiation agent A is boron carbide and / or boron nitride. The shrinkage material provided by the invention has excellent performance, good flame retardation and stable radiation resistance, electric performance and mechanical performance.

The invention discloses a cyclic oligomeric phosphazene base catalyst loaded on polystyrene microspheres, a preparation method and application thereof. The catalyst supports the cyclic oligomeric phosphazene base on the polystyrene microsphere carrier through chemical bonding, which can effectively avoid the detachment of the catalytic active center during use, and the catalyst can be separated from the polymerization reaction product by simple filtration , and repeated use can still maintain high catalytic activity, while containing no metal elements, good environmental benefits.

The invention discloses a method for improving the molecular weight and the yield of a polyphosphazene elastomer, and belongs to the technical field of preparation of polyphosphazene elastomers. The method comprises the following steps: (1) adding a high-boiling-point solvent, reaction raw materials (astarting materialand a hexachlorocyclotriphosphazene monomer), a catalyst, a cocatalyst and an active agent into an anhydrous oxygen-free reaction container, raising the temperature of the system under stirring to 170-250 DEG C, and carrying out a constant-temperature reaction for 0.5-10 hours; then, supplementing an organic solvent or a precipitant into the system, adjusting the reaction temperature to continuously react for 1-30 hours, separating and extracting the reacted PDCP polymer after the reaction is finished, and concentrating the rest of the mixed solution containing a small part of PDCP and a monomer; and (3) adding the PDCP solution obtained in the step (2) into a mixture containing a substitution reagent, an acid-binding agent and a solvent, and performing a reaction, so as to obtain the completely substituted polyphosphazene elastomer. The relative molecular mass of thepolyphosphazene elastomer is improved, and meanwhile, the yield and the solvent utilization rate are increased.