7results about How to "Regular molecular structure" patented technology

The invention discloses ultra-high molecular weight polyethylene pipe production equipment, and particularly relates to the technical field of polymer plastic processing, the ultra-high molecular weight polyethylene pipe production equipment comprises an equipment box, and an extrusion heating mechanism is arranged at the top of the equipment box; the extrusion heating mechanism comprises a driving device which is fixedly installed at the top of the equipment box, the output end of the driving device is fixedly connected with a transmission shaft, one end of the transmission shaft is fixedly provided with a gearbox, and one side of the gearbox is fixedly connected with a fixing pipe. The raw materials are efficiently pretreated, it is ensured that raw material particles are uniform and fully mixed, a good foundation is laid for the subsequent plasticizing and extruding process, the quality and performance stability of the pipe are improved, the temperature requirements of the ultra-high molecular weight polyethylene pipe in different production stages can be met, the molecular structure of the pipe is more regular, and the production efficiency is improved. Therefore, the strength, toughness and corrosion resistance of the pipe are enhanced, and reliable technical support is provided for large-scale production of the ultra-high molecular weight polyethylene pipe.

The invention relates to a lithium ion battery electrolyte additive 2, 4-dicarboxamido sulfonyl cyclobutanone and a corresponding high-temperature lithium ion battery electrolyte. The electrolyte comprises the following components: lithium salt, an anhydrous organic solvent and an electrolyte additive; wherein the electrolyte additive comprises 2, 4-dicarboxamido sulfonyl cyclobutanone, and the electrolyte additive comprises 2, 4-dicarboxamide sulfonyl cyclobutanone; the use amount of the 2, 4-dicarboxamido sulfonyl cyclobutanone in the electrolyte is 0.1%-10% of the total mass of the electrolyte. The high-temperature lithium ion battery electrolyte added with 2, 4-dicarboxamidosulfonyl cyclobutanone can improve the high-temperature discharge performance, the high-temperature charge performance, the high-temperature cycle performance and the safety performance of a lithium ion battery when the lithium ion battery works at 4.2 V, does not influence the first efficiency and the rate capability, and has a relatively good application prospect in a high-temperature system.

The invention relates to the technical field of aqueous zinc ion battery negative electrode materials, in particular to an efficient aqueous zinc ion negative electrode plate and a preparation method thereof. A zinc metal negative electrode of an aqueous zinc ion battery has many interface side reactions and is easy to grow dendrites, so that the cycle life of the battery is relatively short. In order to solve the problems, the invention provides the efficient aqueous zinc ion negative plate which is formed by sequentially coating the surface of a Zn plate with a carbon nitride coating and a zinc titanate coating, carbon nitride in the carbon nitride coating is graphite-phase carbon nitride, and the graphite-phase carbon nitride is stable in property, large in specific surface area and rich in sp2 hybridized nitrogen atoms, so that the specific surface area of the graphite-phase carbon nitride is increased, and the specific surface area of the graphite-phase carbon nitride is increased. The nitrogen source has relatively high electronegativity and zinc affinity, generates an adsorption effect on zinc ions, forms a Zn-N bond, can promote nucleation of the zinc ions and reduce a nucleation barrier of Zn < 2 + > ions, and the carbon nitride coating is loose and porous in structure, is not stable enough in structure and is easy to fall off from the surface of an electrode in the charge-discharge cycle process of the battery, so that the performance of the battery is improved. According to the invention, the zinc titanate coating is arranged on the surface of the carbon nitride coating, and the zinc titanate coating with a compact structure can effectively prevent the carbon nitride coating from being in direct contact with an electrolyte, so that the cycling stability of the battery is effectively improved.

The present invention relates to the field of polyether polyols for polyurethane, and in particular to a method for preparing condensate-based rigid foam polyether polyols. The method comprises the following steps: adding cyclohexanone and paraformaldehyde into a reaction container, adding an alkali catalyst under continuous stirring, reacting to obtain a cyclohexanone formaldehyde condensate; adding cyclohexanone formaldehyde condensate and polyols as mixed initiators into the reaction container, adding a catalyst, heating and dripping the first section of alkylene oxide to extend the polyether chain, and continuing the internal pressure reaction after the feeding is completed to obtain an intermediate polyether polyol; heating and dripping the second section of alkylene oxide, pressurizing after the feeding is completed, and reacting the internal pressure to obtain a polyether polyol crude polymer; keeping the temperature and bubbling with nitrogen, discharging after bubbling, and obtaining a condensate-based rigid foam polyether polyol. Since the cyclohexanone formaldehyde condensate introduces a cyclic group, the introduction of the cyclic structure as an initiator in the process of synthesizing polyether reduces the deformation between molecular chains, thereby improving the demoulding property of the foam.

The present invention belongs to the technical field of fireproof materials, and specifically relates to a ceramic silicone rubber composite material and its preparation method and application. The raw material composition of the ceramic silicone rubber composite material includes a silicone rubber matrix, white carbon black, hydroxy silicone oil, flame retardant, expanded graphite, flux, ceramic filler and crosslinking agent. By introducing the expanded graphite functional additive, the expanded graphite of the composite material will remove oxygen-containing groups and generate gas after being overfired, causing the volume of the material to expand, thereby increasing the sealing extrusion force between the composite material and the sealing gap, improving the explosion-proof impact force of the ceramic silicone rubber, and effectively preventing the spread of flames and smoke; and the deoxidized expanded graphite has a regular molecular structure, so it has good thermal conductivity, can transfer heat to the flux and ceramic filler inside the material in time, which is conducive to reducing the ceramic temperature of the composite material, so that the ceramic structure is quickly formed inside the material, thereby improving the ceramic strength of the composite material.

The invention discloses preparation methods of asymmetric citrate and a PVC composite material thereof, and relates to the technical field of chemical synthesis. The asymmetric citrate is obtained by carrying out esterification reaction on citric acid powder, p-toluene sulfonic acid and fatty alcohol under the action of an acid catalyst and then washing and distilling; the fatty alcohol is a mixture of octanol and decanol in a molar fraction ratio of (1-2): (1-2). The preparation method of the asymmetric citrate / PVC composite material comprises the following steps: mixing PVC powder, asymmetric citrate and tetrahydrofuran, and stirring for dissolving; pouring the mixture into a mold, placing the mold in a ventilated manner for a whole night, and drying the mold in a drying oven to obtain the asymmetric citrate / PVC composite material. According to the preparation method, the mixture of octanol and decanol and a certain amount of citric acid are subjected to esterification reaction to synthesize the novel asymmetric citrate plasticizer, and the synthesized asymmetric citrate product is regular in molecular structure and high in stability.

This invention belongs to the field of polyurethane technology, specifically relating to rigid polyurethane foam materials for high-temperature resistant pipelines and their preparation method. The polyurethane foam is made from component A and component B in a mass ratio of 100:(130~150). Component A includes the following raw materials by mass percentage: polyether polyol A: 7~36%; polyether polyol B: 13~35%; polyether polyol C: 13~37%; catalyst: 3~8%; additives: 3~14%; dispersant: 0.3~4.2%; foam stabilizer: 1.3~2.5%; pentane blowing agent: 6~15%. Component B is polymethylene polyphenyl isocyanate. By using specific polyether blends, adding nano-zirconia and dispersants, and optimizing the ratio of component A to component B, the high-temperature resistance, compressive strength, and dimensional stability of the polyurethane foam are significantly improved, making it suitable for the preparation of pipeline insulation materials.