8results about How to "Simple preparation route" patented technology

The invention belongs to the technical field of water electrolysis hydrogen production, and particularly relates to a catalyst for water electrolysis hydrogen production and a preparation method and application thereof. The catalyst for hydrogen production through water electrolysis comprises a CuO / Cu2O heterojunction structure doped with a metal element X, wherein the metal element X is selected from nickel, iron or a composition of the nickel and the iron. According to the preparation method, a chemical bath deposition method and a thermal chemical treatment method are adopted, and the X-doped CuO / Cu2O heterojunction (X-CuO / Cu2O) rich in oxygen vacancies is constructed on foamy copper. The catalyst has excellent catalytic activity under an alkaline condition, has a small Tafel slope value in HER, OER and MOR reactions, and is fast in reaction kinetics; the charge transfer resistance is small in the water electrolysis process; the electrochemical surface area and the double-electric-layer capacitance Cdl are relatively large, and the electrochemical active area is large; and the stability is lasting, and constant electrolysis lasts for at least 48 hours.

The invention discloses a polyarylether sulfone polymer and a preparation method and application thereof. The preparation method of the polyarylether sulfone polymer comprises the following steps: carrying out condensation polymerization on a bisphenol compound and a dihalogen diphenyl sulfone derivative, boiling, washing and drying to obtain polyarylether sulfone resin. According to the polyarylether sulphone resin disclosed by the invention, by introducing benzoyl, the conjugation degree of a main chain of a polymer is increased, and the rigidity of the main chain is improved, so that the polyarylether sulphone resin has good thermal stability and dimensional stability; meanwhile, the hydrophilicity of the resin is improved due to the increase of carbonyl. The development and utilization prospects in the fields of sewage treatment, gas separation, solid electrolyte, battery diaphragms and the like are very wide. The invention aims to provide a novel high-temperature-resistant hydrophilic polyarylether sulfone resin and a preparation method thereof, i.e., a benzoyl group is introduced into a main chain structure of polyarylether sulfone, so that the structural rigidity of a polymer is improved, and the hydrophilicity is increased.

The invention belongs to the technical field of lithium batteries, and relates to a gel polymer solid electrolyte technology, in particular to a carbon dot composite gel electrolyte and a preparation method thereof. Raw materials of the carbon dot gel electrolyte comprise 1, 3-dioxolane (DOL), an organic solvent, carbon dots and a lithium salt, the raw materials are used for mixing to form a precursor solution, and the precursor solution is used for heating polymerization to form the carbon dot gel electrolyte; the carbon quantum dots are synthesized from citric acid and 4-aminosalicylic acid through a hydrothermal method. The carbon quantum dots and the DOL monomer are crosslinked to form a three-dimensional network structure, so that the ionic conductivity and the thermal stability of the electrolyte are improved, and the cycle performance and the safety of the battery are enhanced. The method simplifies the preparation process, is compatible with the existing battery manufacturing process, and improves the performance of the solid-state battery.

The present invention discloses a polylysine rich in 1,3-dicarbonyl side chains and a preparation method and application thereof. The main chain structure of the polylysine is L -Configuration Polymerization α ‑amino acid, the side chain is a substituent containing a 1,3‑dicarbonyl functional group, and its structural formula is as follows: ;wherein the R group is methyl, methoxy or phenyl; n is an integer ranging from 40 to 95. The present invention uses L‑N‑tert-butyloxycarbonyl‑lysine starting material to synthesize N‑phenoxycarbonyllysine polymerization monomers containing 1,3‑dicarbonyl side chains, and such monomers undergo polymerization reaction under the action of an initiator to obtain polylysine rich in 1,3‑dicarbonyl side chains as in formula I. The polylysine prepared by the present invention is rich in 1,3‑dicarbonyl side chains, has the characteristics of low cost, safety and non-toxicity, can be complexed with copper ions and manganese ions in wastewater to achieve the purpose of purifying metal ion pollution, and the removal capacity of copper ion sewage can reach 75%, while the removal capacity of manganese ion sewage can reach 82%.

The present application provides a gelatin particle and a preparation method thereof, and a hemostatic fluid gelatin composition. The gelatin particle is a cross-linked gelatin particle, and the preparation raw material of the gelatin particle comprises gelatin and a high molecular material containing amino and / or carboxyl; the preparation process of the gelatin particle comprises the steps of forming a gelatin gel from the gelatin and crushing the gelatin gel, wherein the high molecular material is added to mix with the solution of the gelatin or the gelatin gel before or after the formation of the gelatin gel. The gelatin particle and the hemostatic fluid gelatin of the present application can quickly absorb the moisture in the blood after being applied to a bleeding wound, thereby increasing the concentration of red blood cells, blood coagulation factors and the like in the blood, accelerating the endogenous blood coagulation mechanism, and having a good hemostatic effect.

This invention discloses 4,5,6,7-tetrahydrothieno[2,3-c]pyridine-3-carboxamide compounds, their preparation methods, and applications, belonging to the field of pharmaceutical technology. Specifically, the general structural formula of the 4,5,6,7-tetrahydrothieno[2,3-c]pyridine-3-carboxamide compounds or their pharmaceutically acceptable salts is shown in Formula I, where R1 is defined in the claims and specification. The 4,5,6,7-tetrahydrothieno[2,3-c]pyridine-3-carboxamide compounds or their pharmaceutically acceptable salts provided by this invention, as inhibitors of vascular endothelial growth factor receptor 2 (VEGFR-2) kinase and epidermal growth factor receptor (EGFR) kinase, can be used to prepare drugs for the treatment or prevention of tumors related to VEGFR-2 kinase and EGFR kinase, demonstrating good application value and promising development prospects.

The application discloses a kind of high anti-fatigue recyclable epoxidized natural rubber based on double dynamic network and a preparation method thereof, belong to high polymer material and rubber modification technical field.The method first synthesizes precursor monomer containing end double bond and epoxy group, and then activates elemental sulfur to occur ring-opening reaction using activator, to prepare multifunctional crosslinking agent containing dynamic polysulfide bond, hydroxyl and end double bond;Subsequently, the crosslinking agent is mixed with epoxidized natural rubber and compounding agent, and a double dynamic network coordinated by dynamic polysulfide bond and reversible hydrogen bond is constructed in situ by high-temperature hot pressing.The application adopts filler-free strategy, and uses the macroscopic multiscale sacrificial network formed by hydrogen bond and polysulfide bond to achieve high strength and toughness, effectively passivate crack, and give the material extremely high fatigue resistance performance.Meanwhile, the material has excellent solid-state recyclable performance, the preparation route is simple, compatible with traditional rubber processing equipment, and has broad industrial application prospect.

The invention relates to a beta-cyclodextrin-based chrome-free tanning agent which comprises the following components: beta-cyclodextrin powder, sodium periodate, water, absolute ethyl alcohol, ethylene glycol glycidyl ether, distilled water and NaOH. The preparation method comprises the following steps: by using natural corn beta-cyclodextrin as a main raw material, carrying out oxidation pretreatment on C-2 and C-3 on glucose unit groups in molecules of the natural corn beta-cyclodextrin through sodium periodate to obtain dialdehyde beta-cyclodextrin; then, dialdehyde beta-cyclodextrin and ethylene glycol glycidyl ether are used for synthesizing a beta-cyclodextrin-based chrome-free tanning agent; the preparation route is simple, no toxic reagent is used, and no secondary pollution is generated; and secondly, the beta-cyclodextrin-based chrome-free tanning agent is used for a sheepskin tanning process, crust leather obtained after tanning by the beta-cyclodextrin-based chrome-free tanning agent has more excellent mechanical strength and chemical resistance stability, and finished leather has good yellowing resistance and is suitable for processing and manufacturing of wet white leather.