1340 results about "Hydrochloride" patented technology

A method of synthesizing the benzoate salt of 5-MeO-DMT comprising the step of treating the hydrochloride salt of 5-MeO-DMT with a base, prior to the addition of benzoic acid.

A method of synthesizing the benzoate salt of 5-MeO-DMT comprising the step of treating the hydrochloride salt of 5-MeO-DMT with a base, prior to the addition of benzoic acid.

The invention relates to the technical field of organic synthesis, and discloses a preparation process of (S)-3-aminobutyronitrile hydrochloride, which comprises the following steps: by taking a compound S1 as an initial raw material, sequentially implementing chlorination, amino protection, cyano substitution and deprotection reaction through four-step continuous reaction (M01 preparation, M02 preparation, M03 preparation and M04 preparation), and finally obtaining the high-purity (S)-3-aminobutyronitrile hydrochloride. The preparation process disclosed by the invention is simple and convenient to operate, mild in reaction condition, stable in yield of each step, high in safety and suitable for industrial large-scale production, and can be used for carrying out standard treatment on the cyanide-containing wastewater, and has a relatively good application prospect.

The present disclosure provides a hydrochloride or hydrochloride hydrate of a compound of Chemical Formula 1 and a pharmaceutical composition comprising the same.

The invention belongs to the technical field of microorganisms and fermentation engineering, and particularly relates to application of bifidobacterium longum subsp. Infantis Y46 in the aspects of enhancing cell defense and repair and regulating metabolic homeostasis of a host. The strain is isolated from infant feces. Animal experiments prove that living cell thalli of the bifidobacterium longum subsp. Infantis Y46, which are obtained by culturing an MRS liquid culture medium added with L-cysteine hydrochloride (0.05%, v / v), can significantly enhance the oxidative stress resistance of an organism and reduce the level of active oxygen in the organism compared with a control bacterium bifidobacterium longum subsp. Infantis 15697. Transcriptomics analysis shows that the bifidobacterium longum subsp. Infantis Y46 can enhance self-protection of cells and improve physiological imbalance caused by external pressure by regulating related signal channels of an organism. The action mechanism is closely related to signaling pathways related to cell defense, metabolic homeostasis and barrier functions. The invention provides a new strain resource and an application scheme for developing functional food or medicinal preparations for enhancing the health defense function of a human body.

The invention relates to the technical field of fluorosilicone materials, in particular to a glass fiber sleeve with an excellent voltage resistance function and a preparation method of the glass fiber sleeve. The glass fiber sleeve with the excellent voltage-resistant function comprises a glass fiber sleeve and a composite coating coated on the outer side of the glass fiber sleeve, the composite coating is obtained by thermocuring a coating material; the coating material is prepared from the following raw materials in parts by mass: 50 to 100 parts of fluorinated silicone rubber emulsion, 1 to 5 parts of bis (3-aminopropyl) terminated polydimethylsiloxane, 0.5 to 1.5 parts of furfuryl alcohol resin, 1 to 5 parts of epoxy resin, 1 to 5 parts of activated nano silicon dioxide, 1 to 3 parts of boron nitride nanowire, 1 to 2 parts of dopamine hydrochloride, 1 to 2 parts of dispersing agent and 10 to 30 parts of solvent. The invention can effectively ensure that the coating forms a compact cross-linked structure in the curing process, and can enhance the adhesive force of the coating, weaken the temperature difference between the surface and the interior, inhibit the heat accumulation effect and delay the degradation of the insulating property.

The invention discloses a preparation method and application of a rare earth element doped ruthenium oxide catalyst, and the preparation method comprises the following steps: (1) dissolving a rare earth metal salt, a ruthenium metal salt, dopamine hydrochloride and a Tris-HCl buffer agent in water to obtain a mixed solution, and carrying out in-situ polymerization reaction, solid-liquid separation and drying to obtain a powder precursor; and (2) carrying out high-temperature calcination on the powder precursor obtained in the step (1) to obtain the rare earth doped ruthenium oxide catalyst. Rare earth metal salt and ruthenium salt precursors are dispersed on an in-situ constructed porous carbon substrate, and the rare earth element doped ruthenium oxide nanosheet is generated by oxidation under a high-temperature condition through a self-sacrifice template method. The method has the characteristics of high efficiency and no pollution. The rare earth element doped ruthenium oxide disclosed by the invention is used as a catalyst for the anodic reaction of the acidic electrolyzed water, and shows excellent catalytic activity and wide application prospect.

The invention discloses a low-viscosity ternary eutectic solvent as well as a preparation method and application thereof, and belongs to the technical field of CO2 absorbents. The low-viscosity ternary eutectic solvent is composed of polyamine hydrochloride, steric hindrance amine and organic alcohol, the polyamine hydrochloride has multiple active amino groups and is used for guaranteeing the high CO2 absorption rate and absorption load of the ternary eutectic solvent, the steric hindrance amine can inhibit formation of a hydrogen bond network due to the unique steric hindrance structure, and the high CO2 absorption rate and absorption load of the ternary eutectic solvent are improved. The organic alcohol can be used as a viscosity regulating agent, active hydroxyl of the organic alcohol can promote proton transfer in a CO2 desorption reaction, and the CO2 desorption efficiency is enhanced. The ternary eutectic solvent provided by the invention can still maintain a low-viscosity homogeneous liquid state after absorbing CO2, can effectively reduce the reduction of mass transfer efficiency caused by high viscosity, influence on contact with a target compound, heat transfer efficiency and the like, and solves the ubiquitous problems of overhigh viscosity and insufficient regeneration efficiency of the existing DESs system.

The invention relates to the field of preparation of nano materials, in particular to a preparation method of a metal-oxide cluster electro-catalytic material based on an ammonia-mediated electrostatic adsorption principle, and aims to solve the problem that a metal-oxide cluster heterogeneous interface is difficult to accurately construct by an existing method. The preparation method comprises the following steps: dispersing a carbon carrier, a soluble inorganic compound containing platinum, ruthenium and rhodium, a soluble metal complex anion salt and dopamine hydrochloride in a water-alcohol mixed solution, adding ammonia water, and preparing a metal-oxide heterogeneous cluster precursor through an ammonia-mediated electrostatic adsorption effect; and pyrolyzing the precursor in a reducing atmosphere to prepare the metal-oxide cluster electro-catalytic material. The prepared electro-catalytic material has a definite heterogeneous cluster interface and has excellent performance in alkaline hydroxide reaction. The method is simple and convenient to operate, low in cost and low in energy consumption, can be popularized to various metal-oxide cluster electro-catalytic materials, and has application potential.

The present application relates to a kind of phosphine oxy group covalent modification composite adsorption material and its preparation method and purposes, the preparation method includes the following steps: (1) mixing dopamine hydrochloride, phosphine-containing substrate, tris-hydroxymethyl aminomethane hydrochloride and sodium hydroxide in solvent, to obtain mixed solution;(2) the mixed solution obtained in step (1) and solid phase material are mixed, then oscillation reaction is carried out, to obtain solid-liquid mixture;(3) the solid-liquid mixture obtained in step (2) is carried out solid-liquid separation, and the solid phase part obtained is sequentially washed and dried, to obtain phosphine oxy group covalent modification composite adsorption material.The phosphine oxy group covalent modification composite adsorption material provided by the present application has excellent adsorption selectivity and material stability, and can be used for the high-selectivity separation and recovery of rare metals indium and gallium.

The invention discloses a modified polyester fiber as well as a preparation method and application thereof, and relates to the field of fibers. When the modified polyester fiber is prepared, nano shell powder sequentially reacts with 3-aminopropyltrimethoxysilane, 4-fluoro-2-hydroxybenzaldehyde and 1-(4-hydroxyphenyl) biguanide hydrochloride, and functionalized shell powder is prepared; the preparation method comprises the following steps: reacting diethyl (aminomethyl) phosphonate, formaldehyde and glyoxal to prepare imidazolium salt phosphoric acid; and mixing the functionalized shell powder and polyester, spinning, carrying out surface alkali treatment, and finally carrying out surface finishing by using imidazolium salt phosphoric acid to obtain the modified polyester fiber. The modified polyester fiber prepared by the invention has excellent flame retardance, antibacterial property and light aging resistance.

The invention discloses a preparation process of berberine hydrochloride, and belongs to the technical field of berberine production. The invention relates to a berberine hydrochloride preparation process, which comprises: S1, mixing a ferric sulfate-aluminum sulfate composite salt, sodium chloride, zinc chloride and anhydrous formic acid, pre-activating, adding N-2, 3-dimethoxybenzyl homopiperony lamine hydrochloride, dropwise adding a glyoxal mixed solution, and carrying out a reflux reaction. And S2, cooling the reaction liquid until a solid is separated out, filtering, adding a filter cake and diatomite into purified water, stirring, adjusting alkali, heating, and continuously stirring for 0.5-1 hour. Cooling and filtering, and reserving filtrate; s3, adjusting the acidity of the filtrate, cooling and growing crystals; and filtering, rinsing a filter cake, and carrying out vacuum drying on the filter cake to obtain berberine hydrochloride. The berberine hydrochloride prepared by the method is high in yield and purity, and the preparation process is safe, short in flow and friendly to human bodies and environment.

The invention belongs to the technical field of solar cells, and particularly discloses a texturing additive, a texturing solution and a texturing method of a back contact cell. The texturing additive for the back contact battery comprises the following components in percentage by mass: 1.0%-5.0% of sodium carboxymethyl cellulose, 0.03%-0.2% of sodium lignin sulfonate, 0.003%-0.03% of paeoniflorin, 0.005%-0.05% of salvianolic acid B, 0.001%-0.01% of polyhexamethylene biguanide hydrochloride, 0.3%-1.0% of a buffering agent, 0.01%-0.1% of a surfactant and the balance of water. The components interact with each other, and the texturing additive is added into the texturing liquid to improve the flatness of the texturing surface and effectively solve the problem that the texturing surface is not fully distributed, so that the minority carrier lifetime and the open voltage of the back contact battery are improved, and the photoelectric conversion efficiency of the battery is improved.

The invention provides a polyglutamic acid granular fertilizer and a preparation method thereof, and the preparation method comprises the following steps: S1, dissolving lignin in an alkaline solution, and heating until the lignin is dissolved; adding epsilon-polylysine fermentation liquor, mixing, heating, adding a formaldehyde solution, and carrying out grafting reaction to obtain epsilon-polylysine grafted lignin; s2, mixing the epsilon-polylysine grafted lignin solution and the gamma-polyglutamic acid solution, adding N-hydroxysuccinimide, standing at a low temperature, adding 1-ethyl-(3-dimethylaminopropyl) carbodiimide hydrochloride, and mixing; carrying out gradient temperature reaction to obtain lignin grafted epsilon-polylysine / gamma-polyglutamic acid hydrogel; and S3, homogenizing the lignin-grafted epsilon-polylysine / gamma-polyglutamic acid hydrogel, carrying out normal-temperature high-pressure airflow crushing, and spraying the crushed hydrogel to the surfaces of particles obtained by granulating a basic material through high-pressure electrostatic spraying, so as to obtain the polyglutamic acid granular fertilizer. The obtained polyglutamic acid granular fertilizer has relatively strong water-retaining and slow-release (releasing water, urea and the like) effects.

The invention relates to a corrosion inhibitor for corrosion prevention of an ultra-deep well, in particular to a method for prolonging the protection period of a solid corrosion inhibitor for the ultra-deep well, which comprises the following steps: S1, uniformly mixing an imidazoline corrosion inhibitor and an N-hydrochloride-containing corrosion inhibitor, adding an auxiliary corrosion inhibitor, and mixing to obtain a corrosion inhibitor intermediate; and S2, mixing and stirring the corrosion inhibitor intermediate and a curing agent, and pouring the mixture into a mold for molding to obtain the ultra-deep well solid corrosion inhibitor with the long protection period, the mold is made of a metal foil, and small holes are distributed in the metal foil. The corrosion inhibitor is low in dosage, long in release period, good in corrosion inhibition effect, simple to operate and convenient to construct; the release rate of the solid corrosion inhibitor for the ultra-deep well can be adjusted, the release rate is controlled and adjusted by changing the contact area of the corrosion inhibitor and the outside, the protection period of the solid corrosion inhibitor for the ultra-deep well is prolonged, the comprehensive corrosion inhibition rate can reach 85% or above, the crude oil yield is increased, and remarkable economic effects are achieved.

The invention belongs to the field of antibacterial materials, and discloses a preparation method of a composite material modified carbon-nitrogen material as well as a product and application of the composite material modified carbon-nitrogen material. In order to achieve the long-acting and efficient antibacterial performance of the nano material, g-C3N4 powder is taken and placed in methyl alcohol, zinc nitrate is added, stirring is conducted till the zinc nitrate is dissolved, then the mixture is mixed with a methanol solution of 2-methylimidazole, after the mixture is subjected to heat treatment, the mixture is mixed with a polyhexamethylene biguanide hydrochloride aqueous solution, and the nano material is obtained. A compact inert material protection layer can be grown on the surface of the material by adopting an atomic layer deposition technology. The method provided by the invention is simple to operate and can be used for batch production, the obtained composite material integrates the advantages of an organic antibacterial agent and an inorganic antibacterial agent and has long-acting and efficient antibacterial performance, and the antibacterial material obtained by the method can be applied to various fields, such as antibacterial performance modification of antibacterial plastics and textiles.

The invention relates to an L-proline heterocyclic intermediate, alpha-methyl-L-proline hydrochloride and a preparation method thereof, which comprises the following steps: step 01, cyclization upper protection: taking L-proline as a raw material, which is shown in a formula (1), to react with trichloracetic aldehyde hydrate under an acidic condition, and performing upper protection to obtain a heterocyclic intermediate as shown in a formula (2); the molar weight of chloral hydrate is 1-2.5 times of the molar weight of the L-proline shown in the formula (1), preferably 1.5 times of the molar weight of the L-proline shown in the formula (1). 02, methylation: reacting the heterocyclic intermediate as shown in the formula (2) obtained in the step 01 with lithium diisopropylamide, and after the reaction is completed, adding dimethyl sulfate for methylation to obtain an intermediate as shown in a formula (3); 03, deprotection: adding the intermediate as shown in the formula (3) obtained in the step 02 into a deprotection reagent for hydrolysis so as to obtain the alpha-methyl-L-proline hydrochloride as shown in the formula (4), so that the problems that the preparation cost of the existing alpha-methyl-L-proline hydrochloride is relatively high and the yield is relatively low can be solved.

The invention relates to the field of sheath materials, and discloses an anti-aging sheath material for an electronic wire and a preparation method thereof, the sheath material comprises low density polyethylene, an ethylene-vinyl acetate copolymer, an ethylene-octene copolymer, ethylene propylene diene monomer, a triazine ring derivative, ammonium polyphosphate, modified nano silicon dioxide and an auxiliary agent; according to the triazine ring derivative, N-butyl-2, 2, 6, 6-tetramethyl-4-piperidylamine reacts with cyanuric chloride to prepare a triazine ring monosubstituent, hydrazine hydrochloride is used as a bridging agent to react with the triazine ring monosubstituent, and the triazine ring derivative and piperazine are polymerized to prepare the triazine ring derivative. The modified nano silicon dioxide is prepared by enabling 3-(3, 5-di-tert-butyl-4-hydroxyphenyl) propionyl chloride and 4-propenyloxy-2-hydroxybenzophenone to react, and carrying out free radical polymerization on the reaction product on the surface of the nano silicon dioxide. The synergistic effect of mechanical property, thermo-oxidative aging resistance, ultraviolet aging resistance and flame retardant property is realized.

The invention relates to a synthesis process of an omarigliflozin intermediate, and belongs to the technical field of drug synthesis, one-step efficient conversion is adopted in the process of synthesizing the omarigliflozin intermediate, p-bromophenylhydrazine hydrochloride is used as a starting raw material, and a target product is obtained through indole cyclization, alkali precipitation and acidification crystallization. Toluene plays a role in cyclization and dehydration in a high-temperature reflux process, in a purification process of alkali precipitation and acidification crystallization, a sodium hydroxide aqueous solution is utilized to hydrolyze and convert a product into water-soluble sodium salt, the water-soluble sodium salt enters a water phase, a toluene layer containing a large amount of organic impurities and the water phase are layered in a standing and layering process, and the organic impurities in the toluene layer are removed; the preparation method comprises the following steps of: preparing a sodium salt, acidifying in a water phase by using hydrochloric acid, changing the sodium salt form of the product into an acid form, and crystallizing from the water phase, which is equivalent to recrystallization purification, so that the prepared product has higher purity, the purity is stabilized at 98% or above, and the purity of the product can meet the quality standard of medical intermediates.

The invention discloses a folic acid modified active oxygen response type sodium alginate nano-carrier and application thereof, and the preparation method comprises the following steps: firstly synthesizing-Se-Se-FA: stirring dicyclohexylcarbodiimide, 4-dimethylaminopyridine, dimethyl sulfoxide / pyridine, a double-selenium fragment and folic acid at room temperature for 18-22 hours in an argon environment; and carrying out acetone precipitation, centrifugation, washing, rotary evaporation concentration and freeze-drying. The preparation method comprises the following steps: preparing an ALG-Se-FA carrier, stirring sodium alginate, 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide hydrochloride and hydroxysuccinimide in a 2-morpholinoethanesulfonic acid buffer solution, adding DMSO, dissolving a double-selenium fragment and a-Se-Se-FA fragment in DMSO and deionized water, adding the dissolved double-selenium fragment and-Se-Se-FA fragment into a system, stirring, dialyzing, and freeze-drying to obtain the product. According to the carrier, a double-selenium bond ROS response unit and folic acid targeting molecules are introduced through covalent bonds, astaxanthin can be efficiently entrapped and protected, and after the carrier is stable in gastrointestinal environment and reaches a colitis disease part, high ROS level can be responded, and intelligent drug slow release is achieved through folic acid receptor targeting.

The present disclosure relates to a crystalline form of trans-4-[1-(3-Chloro-phenyl)-7-methoxy-2,4-dioxo-3,4-dihydro-2H-pyrimido[5,4-c]quinolin-3-yl]-cyclohexanecarboxylic acid hydrochloride, methods of preparation, and its use as a therapeutic agent to treat inflammatory diseases.

The invention belongs to the technical field of hydrogel dressings, and particularly relates to a high-viscosity antibacterial hydrogel dressing as well as a preparation method and application thereof. The high-viscosity antibacterial hydrogel dressing is prepared from the following raw materials in parts by weight: 4 to 15 parts of oxidized sodium hyaluronate, 2 to 10 parts of chondroitin sulfate, 2.5 to 5 parts of epsilon-polylysine hydrochloride, 1 to 5 parts of hydroxypropyl methyl cellulose and 2 to 4 parts of sodium alginate. The hydrogel dressing prepared by the invention has good effects of inhibiting bacteria, stopping bleeding and promoting wound healing.

The invention relates to the technical field of petroleum drilling fluid loss reduction, and discloses an anti-divalent salt fluid loss agent for drilling fluid, which is prepared by the following steps: step 1, beta-cyclohexylamine and 6-chloro-1-hexene are subjected to a reaction to obtain alkenyl beta-cyclohexylamine; step 2, initiating polymerization of alkenyl beta-cyclopentadiene, a hyperbranched monomer pentaerythritol triallyl ether and 2-acrylamide-2-methylpropanesulfonic acid under the action of azobis (isobutylamidine hydrochloride), so as to obtain an intermediate A; 3, 3-dimethylamino-1-propylamine and palmitic acid are subjected to a reaction, and an intermediate 2 is obtained; 4, the intermediate 2 and benzyl chloride are subjected to a reaction, and quaternary ammonium salt modified fatty acid is obtained; and 5, stirring and mixing the intermediate A, quaternary ammonium salt modified fatty acid and coupling agent modified walnut powder to obtain the divalent salt resistant filtrate reducer for the drilling fluid. The anti-divalent salt filtrate reducer for the drilling fluid has a relatively good anti-divalent salt effect.

The invention provides a UPLC-MS / MS (Ultra Performance Liquid Chromatography-Mass Spectrometry / Mass Spectrometry) detection method for N-nitroso landiolol in a landiolol hydrochloride bulk drug. The method comprises the step of carrying out qualitative detection or quantitative analysis on a potential nitrosamine impurity-N-nitroso landiolol in a landiolol hydrochloride bulk drug by adopting an ultra-high performance liquid chromatography-tandem mass spectrometry (UPLC-MS / MS), wherein the structural formula of the N-nitroso landiolol is shown as a formula I in the specification. The detection method disclosed by the invention is high in sensitivity, strong in specificity and good in repeatability, can be used for rapidly and effectively detecting N-nitroso landiolol in the landiolol hydrochloride bulk drug, and has important significance on quality control of the landiolol hydrochloride bulk drug. ; formula I.

The invention relates to the technical field of organic chemical synthesis, and discloses a continuous production process of a cationic etherifying agent, which comprises the following steps: taking trimethylamine hydrochloride and epoxy chloropropane as raw materials; the method comprises the following six steps: raw material pretreatment, premixing, continuous reaction, continuous separation, refining and product storage: mixing and dissolving trimethylamine hydrochloride and a solvent, preparing a catalyst solution, uniformly mixing the three materials through a static mixer, feeding into a multi-stage tubular reactor, and carrying out segmented temperature control continuous reaction, and performing flash evaporation solvent removal and rectification on the reaction product to obtain a crude product, and performing ion exchange impurity removal and reduced pressure distillation refining to finally obtain a high-purity product. The method solves the problems of low yield and more byproducts in the traditional process, and is suitable for industrial large-scale production.

The invention relates to the technical field of palladium recovery, in particular to a method for recovering palladium. According to the technical scheme, the method comprises a precipitant pre-synthesis stage, a targeted palladium precipitation stage and a multi-stage reduction purification stage, and the precipitant pre-synthesis stage comprises the step of adding 10-15 parts by mass of butanedione, 18-30 parts by mass of hydroxylamine hydrochloride and 0.1-0.3 part by mass of iron phthalocyanine into a reaction kettle. Through a composite precipitator system and a multi-stage reduction process, the method has safety and high efficiency: flammable and explosive solvents such as ethanol and highly toxic reducing agents such as hydrazine hydrate are not needed, so that the potential safety hazard of production and the environment-friendly treatment cost are remarkably reduced; high-selectivity capture and efficient reduction of palladium are achieved through magnetic separation of magnetic nano-microspheres, induced precipitation of nitrogen-doped graphene quantum dots and a staged temperature-control and pressure-control reduction technology, the palladium recovery rate and purity are high, the process period is short, operation is controllable, and the method is suitable for industrial continuous production.

The invention provides a method for synthesizing N-methylated polypeptide, which comprises the following steps: dissolving a carboxylic acid compound, N-methyl amino-acid ester hydrochloride or N-methyl amino-acid ester, an alkaline substance and pivaloic anhydride in an organic solvent, reacting at 15-80 DEG C for 3-10 hours, and post-treating the obtained reaction liquid to obtain an N-methyl dipeptide compound, the method comprises the following steps: removing a protecting group in an N-methyl dipeptide compound to obtain a free-state N-methyl dipeptide compound, and condensing the free-state N-methyl dipeptide compound and amino acid or N-methyl amino-acid ester protected by amino to obtain the N-methylated polypeptide, the mixed anhydride intermediate is formed in situ, and the reaction is completed in one step; according to the method, trimethylacetic anhydride is used as a condensing agent, the structure is simple, the reaction is safe, cheap and non-toxic, a large amount of nitrogen-containing byproducts are not generated in the reaction, and purification is convenient; the method is high in stereoselectivity, and racemization is avoided; according to the method, environment-friendly solvents such as ethyl acetate can be used, the reaction condition is mild, and the reaction time is short.

The application discloses a preparation method of superfine nanofiber antibacterial and mosquito-repellent high-efficiency low-resistance air filtration membrane, which comprises the following steps: dissolving cellulose acetate, cinnamyl aldehyde and polyhexamethylene biguanide hydrochloride in a solvent, fully stirring to form a spinning solution, wherein the solvent is a mixed solution of acetone, N, N-dimethylacetamide and water; and performing electrostatic spinning on the spinning solution to obtain the superfine nanofiber antibacterial and mosquito-repellent high-efficiency low-resistance air filtration membrane. The manufacturing steps of the application are simple and not complicated; cellulose acetate has excellent mechanical properties, hydrophobicity and thermal stability, and is an ideal material for air filtration membrane; the liquid property of cinnamyl aldehyde can effectively dilute cellulose acetate, so that the overall binding energy of the mixed solution system is reduced, the diameter of the prepared fiber is reduced, and meanwhile, the mild binding force of cinnamyl aldehyde minimally affects the interaction between cellulose acetate molecules.

This invention discloses an MPP pipe for power cables and its preparation method, relating to the field of polymer materials technology. The invention comprises, by weight, 80-90 parts of a toughening nucleating agent; 40-45 parts of an insulating nucleating agent obtained by in-situ composite and gradient temperature imidization treatment of a polyamic acid prepolymer prepared from hexagonal boron nitride nanosheets (prepared by surface modification with dopamine hydrochloride, followed by modification with octyltriethoxysilane) to obtain a silanized boron nitride suspension; 40-45 parts of melamine cyanurate; 2.1-2.4 parts of an antioxidant; 2.6-3 parts of a light stabilizer; 8-9 parts of a lubricant; and 1340-1500 parts of polypropylene. The introduction of the toughening nucleating agent and insulating nucleating agent in this invention effectively improves the flame retardancy, low-temperature rigidity-toughness balance, and aging resistance of the MPP pipe.

The invention provides a perovskite solar cell and a preparation method thereof. The perovskite solar cell at least comprises a conductive substrate, a hole transport layer, a perovskite active layer and an electrode layer which are stacked, the material of the hole transport layer comprises a self-assembly material and a doping material; the doping material comprises hydrochloride of boric acid phenyl ammonium. Hydrochloride of boric acid phenyl ammonium is doped into existing self-assembly molecules, on one hand, wettability of the hole transport layer can be improved, and on the other hand, nitrogen atoms on ammonium radicals on the hydrochloride of boric acid phenyl ammonium can serve as Lewis base to conduct passivation modification on the perovskite active layer.