534 results about "Polyvinyls" patented technology

The invention discloses a high-selectivity magnesium-lithium separation nanofiltration membrane based on a polyolefin base membrane and a preparation method and application of the high-selectivity magnesium-lithium separation nanofiltration membrane based on the polyolefin base membrane. The preparation method comprises the steps that the polyolefin base membrane is in single-face contact with an organic phase monomer solution containing an isophthaloyl chloride monomer or a paraphthaloyl chloride monomer, and the redundant solution is poured out; one side, contacted with the organic phase monomer solution, of the obtained membrane is contacted with a polyethyleneimine-containing aqueous phase monomer solution, an interfacial polymerization reaction is carried out, the obtained membrane is placed in a drying oven for heat treatment, then the membrane is soaked in an organic solution for activation, and the polyvinyl composite nanofiltration membrane is obtained. The nanofiltration membrane has high magnesium ion interception and high magnesium-lithium separation selectivity in a mixed solution with a high magnesium-lithium ratio, the preparation process is simple, conditions are mild, amplification and industrial production are easy to realize, and the nanofiltration membrane has good long-term operation stability.

Electrospun poly(acrylic) acid (PAA) / poly(vinyl) alcohol PVA nanofibers and integrated filtration membranes generated therefrom are disclosed herein. The membranes are suitable for use in selectively removing heavy metals such as lead and cadmium from water. The surface of the nanofibers is preferably functionalized with one or more chelating agents. The membranes have a high removal efficiency and adsorption capacity with well-distributed high-density heavy metal adsorption sites with strong binding affinities for targeted heavy metals.

The invention discloses lithium ion battery slurry and a coating process thereof, and belongs to the technical field of battery diaphragms. The lithium ion battery slurry comprises the following raw materials in parts by weight: 40-50 parts of ceramic powder, 10-15 parts of bio-based semi-aromatic polyamide, 10-15 parts of polyvinylidene fluoride, 35-45 parts of a solvent and 1-4 parts of a dispersing agent. The coating process comprises the following steps: A1, sequentially adding a solvent and a dispersing agent into a stirring tank, then adding ceramic powder, bio-based semi-aromatic polyamide and polyvinylidene fluoride, and uniformly stirring and mixing to obtain bio-based coating slurry; a2, feeding a polyethylene-based membrane into a coating device, coating by using the bio-based coating slurry prepared in the step A1, coating at least one side of a battery diaphragm by adopting a micro-concave roller coating mode, and drying and rolling the coated battery diaphragm to obtain a finished product of the ceramic-coated lithium battery composite diaphragm. The dispersing agent is used in the process of preparing the coating slurry, so that the mechanical property, the heat resistance and the adhesion property of the diaphragm can be improved.

The invention discloses a tensile strength detection device for an epoxy resin and polyvinyl composite material, and belongs to the field of tensile strength detection. The tensile strength detection device for the epoxy resin and polyvinyl composite material comprises a supporting table provided with a portal frame and a guide frame, a movable cross beam and a control box which are arranged on the portal frame, and further comprises a first driving assembly for driving the movable cross beam to move up and down, and a second driving assembly for driving the movable cross beam to move up and down, the two clamping parts are used for clamping the sample wafer and are respectively arranged on the upper side of the supporting table and the lower side of the movable cross beam; the two lifting platforms are arranged on the guide frame in a sliding manner; the detection frame is detachably connected to the lifting platform; the problem that the precision is affected by passive movement is effectively solved by adopting an active movement mode, automatic distance fixing can be achieved, errors caused by manual marking and manual clamping are avoided, and the detection precision is improved.

The invention discloses a method for preparing a polyvinyl polyamide composite reverse osmosis membrane by coupling reversed-phase interfacial polymerization with lignosulfonate, which adopts a reversed-phase interfacial polymerization method and comprises the following steps: firstly adding an oil phase containing polyacyl chloride, and then adding a water phase containing amine monomers and lignosulfonate. Molecules of the lignosulfonate contain more sulfonate radicals, so that the lignosulfonate is endowed with hydrophilicity, meanwhile, a large number of active functional groups such as phenolic hydroxyl groups, alcoholic hydroxyl groups and carboxymethyl exist, and oxygen atoms, sulfur atoms and the like in the functional groups contain unbonded electron pairs and can participate in interfacial polymerization reaction to form a cross-linked structure; the trade-off effect of the flux and the rejection rate of the reverse osmosis membrane is broken, and the polyvinyl polyamide reverse osmosis membrane with high flux and high rejection rate is obtained. The raw material of the polyethylene base material is low in price, and the product can be applied to the fields of water treatment, seawater desalination, brackish water desalination and the like on a large scale.

The invention discloses a preparation process and application of a wear-resistant and high-temperature-resistant cable, and belongs to the technical field of cable material processing. In order to solve the technical problem that in the prior art, the wear resistance, heat resistance and heat conduction performance of cable materials for high-speed trains need to be further improved, the preparation technology of the wear-resistant and high-temperature-resistant cable comprises the following steps that a plurality of cable cores are arranged in the length direction of a hemp rope with the hemp rope as the axis, and rubber strips are filled among the cable cores; and then a polyester tape and cable core mixture is wrapped outside the plurality of cable cores and the filling strips. The composite graphene, polysiloxane and modified magnesia are used as reinforcing materials to reinforce a polyethylene base material, so that the mechanical strength and wear resistance of the cable material are effectively improved, and the flame retardant property, heat resistance and heat-conducting property of the cable material are also improved.

The invention relates to a perovskite solar cell and a preparation method thereof, a photovoltaic module, a system and an electric device. The perovskite solar cell comprises a transparent electrode layer, and a perovskite layer, an electron transport layer and a metal electrode which are sequentially arranged on the transparent electrode layer; the electron transport layer comprises an organic electron transport material, a first additive and a second additive; the first additive is prepared from one or more of polymethyl methacrylate, a methacrylic acid-methyl methacrylate copolymer, a 4-vinylpyridine-styrene copolymer, polyacrylonitrile and poly (4-vinylpyridine); the second additive comprises one or more of a compound shown as a formula I and a compound shown as a formula II. The perovskite solar cell provided by the invention has relatively high photoelectric conversion efficiency and relatively good stability.

The invention discloses a cross-linked polyethylene insulating material for middle and high voltage cables and a preparation method of the cross-linked polyethylene insulating material. Comprising the following raw material components in parts by weight: 100 parts of a polyethylene base material, 1.0-2.5 parts of a peroxide cross-linking agent, 0.05-0.5 part of an anti-scorching agent, 0.1-5.0 parts of a water tree resistant additive, 0.1-1.0 part of a main antioxidant, 0.1-1.0 part of an auxiliary antioxidant, 0-2.0 parts of a processing aid and 0-0.5 part of a metal deactivator. The cross-linked polyethylene insulating material for the middle-high voltage cable is suitable for manufacturing a power cable insulating layer with the rated voltage of 10 kV or above. And the method is particularly suitable for application scenes with high requirements on processing stability, long-term reliability and energy efficiency.

The invention discloses a preparation method of a solvent-resistant nanofiltration membrane and the solvent-resistant nanofiltration membrane. The preparation method comprises the following steps: infiltrating a polyethylene-based membrane; performing hydrophilic modification treatment on the infiltrated polyethylene base membrane by using a hydrophilic modification solution to obtain a precursor base membrane; preparing a water phase solution containing UiO-66, and preparing an oil phase solution containing polyfunctional aromatic acyl chloride; performing interfacial polymerization reaction on the surface of the precursor base membrane by using the water-phase solution and the oil-phase solution to obtain a polyethylene nanofiltration membrane; performing cross-linking treatment on the polyethylene nanofiltration membrane by using a cross-linking solution to obtain the solvent-resistant nanofiltration membrane, wherein the solute of the hydrophilic modification solution comprises dopamine and polyethyleneimine. Hydrophilic modification treatment of dopamine and polyethyleneimine is carried out on the polyethylene film, and UiO-66 nanoparticles are added into a water-phase solution, so that the flux and the interception performance of the film are remarkably improved.

The invention discloses a silane self-crosslinking polyethylene overhead insulation material for a cable and a preparation method. The insulating material comprises a polyethylene base material, a silane coupling agent, a catalyst, an antioxidant, a nanoscale reinforcing filler, a core-shell structure filler and nano montmorillonite. The polyethylene base material is a blend of polyethylene with different densities and can give consideration to rigidity and toughness; the nanoscale reinforcing filler is nano calcium carbonate modified by silane; the core-shell structure filler takes nano calcium carbonate as a core and an ethylene-octylene copolymer as a shell, so that the processing fluidity can be improved, and the filler agglomeration can be avoided; the nano montmorillonite can improve the aging resistance and the electrical insulation strength. The preparation method comprises the steps of nano filler pretreatment, nano montmorillonite modification, polyethylene base material blending, component mixing, crosslinking and post-treatment, through the pretreatment, modification, optimized mixing and crosslinking processes, it is ensured that all components are evenly dispersed, compatibility is improved, and the processing performance, the mechanical performance and the electrical performance of a finished product are balanced.

It relates to a porous self-standing homogeneous hydrogel comprising poly(vinyl alcohol) and carbon nanostructures, wherein: the carbon nanostructures are present in an amount from 7 to 85% by weight with respect to the sum of the weights of the poly(vinyl alcohol) and of the carbon nanostructures and the pores have an average particle size equal to or higher than 8 µm. It also relates to processes for the preparation of these hydrogels including phase inversion and cross-linking methods, and to their use in nerve regeneration.

The invention discloses a preparation method and application of a cross-basement membrane back-diffusion in-situ growth ZIF modified polyvinyl polyamide positively charged nanofiltration membrane. The preparation method comprises the following steps: firstly, coating a support membrane by using an organic phase solution containing a trimesoyl chloride monomer; the preparation method comprises the following steps: preparing a supporting basement membrane, pouring a mixed aqueous solution of polyethyleneimine and zinc nitrate hexahydrate on the supporting basement membrane to carry out interfacial polymerization, overturning the supporting basement membrane after polymerization, pouring a 2-methylimidazole aqueous solution on the surface, carrying out cross-basement membrane in-situ growth of ZIF, and carrying out heat treatment and alcohol activation on the membrane after growth. According to the method disclosed by the invention, ZIF particles can be more uniformly generated in the membrane, interface gaps caused by MOF agglomeration are avoided, a high-positive-electricity layer can be prepared by combining a reverse-phase interface polymerization method in which polyethyleneimine is used as a water-phase monomer, and the water permeation flux is greatly improved while high interception of magnesium ions is maintained; the problem of mutual restriction of permeability and selectivity is solved, the process is simple, and preparation conditions are mild.

Layers of a recyclable packaging material can include an outer layer including a polyethylene-based film layer; an interior layer including a polyethylene-based reinforcing layer; and an inner layer including a polyethylene-based sealant layer. The packaging material can further include a first polyethylene-based tie layer positioned between and adhering the polyethylene-based film layer and the polyethylene-based reinforcing layer; and a second polyethylene-based tie layer positioned between and adhering the polyethylene-based reinforcing layer and the polyethylene-based sealant layer.

The invention discloses a high-filling type II anhydrite polyethylene composite packaging material and a preparation method thereof, and belongs to the technical field of plastic packaging materials. The composite material comprises modified gypsum which is coated by nano SiO2 and is synergistically modified by double coupling agents, and polyethylene serving as a base material, wherein the addition amount of the modified gypsum is 60%; a gradient temperature control twin-screw extruder is adopted for processing, during extrusion processing, the front-section temperature is 155-165 DEG C, the middle-section temperature is 185-195 DEG C, the rear-section temperature is 205-215 DEG C, and a gradient filler distribution material is formed after extrusion; the problems that under the condition of 60% high doping, II type anhydrite is difficult to disperse in a polyethylene base material, and under the condition of high doping, the material surface is rough are solved.

The invention relates to the technical field of conveying belt preparation, and particularly discloses an acid-base-resistant heat-resistant aramid rope conveying belt and a preparation method thereof. An acid-alkali-resistant heat-resistant aramid rope conveying belt comprises an aramid cloth core layer, an upper covering rubber layer and a lower covering rubber layer, and the upper covering rubber layer and the lower covering rubber layer are made of the same acid-alkali-resistant heat-resistant rubber composition. The acid-alkali-resistant heat-resistant rubber composition is prepared from the following raw materials: ethylene propylene diene monomer, fluorinated silicone rubber, modified silicon carbide, carbon black, acid-alkali response type microcapsules, zinc oxide, stearic acid, an anti-aging agent, an accelerant and a vulcanizing agent, the modified silicon carbide is prepared by growing a mesoporous titanium dioxide layer on the surface of a silicon carbide nanowire through an atomic layer deposition technology; the wall material of the acid-base response type microcapsule is poly (2-vinylpyridine-co-ethyl acrylate), and the core material of the acid-base response type microcapsule is nano aluminum hydroxide and polydopamine. The conveying belt has excellent heat resistance and acid and alkali corrosion resistance, and can adapt to more complex and harsh material conveying environments.

A method for manufacturing a tube fitting includes steps of: preparing the tube fitting; and forming a resin coating layer upon a coated region provided upon the surface of the tube fitting. Forming the resin coating layer includes: dipping the tube fitting into a coating material that includes as components a polyethylene based substance, a lubricant, and solid particles and having viscosity within a range of 4.24 to 5.27 mPa·s at 25° C., and adhering the coating material to the coated region; and, drying the coating material which is adhered to the coated region of the tube fitting. In the dipping step, the mass per unit area w is controlled within a range 0.79<w<10.07 by dipping the tube fitting while regulating a temperature of the coating material within a range of 30° C. to 40° C.

Provided is a novel composition, in particular, a composition comprising an inorganic-organic hybrid compound. The composition comprises an inorganic-organic hybrid compound and a hydrophobic resin, wherein the inorganic-organic hybrid compound comprises a polyvinyl alcohol-based resin to which a metal oxide is chemically bonded.

The invention provides a wear-resistant polyethylene composite material for a marine organism prevention device and a preparation method of the wear-resistant polyethylene composite material, a UiO-66 (Zr) metal organic framework is adopted as a basis, and linear polyethyleneimine is used for coating modification to obtain a UiO-66 (Zr) coated PEI wear-resistant filler; and then the UiO-66 (Zr)-coated PEI wear-resistant filler, a polyethylene matrix, a compatibilization modifier and an antioxidant are subjected to mixed injection molding to obtain the polyethylene composite material with good mechanical properties and excellent wear resistance, and the polyethylene composite material is suitable for being widely applied to offshore wind power marine organism prevention devices.

The present disclosure relates to a procedure for the synthesis of polymers (homo and copolymers) of the poly (ionic liquid) (PIL) type. The homopolymers are derived from polyvinylimidazolium, polyvinylpyrrolidone or polyvinylpyridine and the copolymers from monomers of vinyl ionic liquids (ILs) are derived from imidazole and N-vinylpyrrolidone. The structural modification of these homopolymers and copolymers occurs by using strong inorganic acids such as sulfuric, chlorosulfonic and bromosulfonic, among others, and halide metallic salts such as AlCl3, FeCl3, CuCl, ZnCl2, and SnCl2. Also, these PILs are employed as catalysts in alkylation reactions between isoparaffins and olefins for producing alkylate gasoline.

The invention provides a high-dispersity polyethylene primary color master batch and a preparation method thereof, and relates to the field of polyethylene primary color master batches. The high-dispersity polyethylene-based primary color master batch comprises 40-60% of high-density polyethylene, 20-40% of a heat-stable pigment, 10-20% of a dispersant and 5-10% of a compatible agent. By selecting the specific heat-stable pigment and combining the efficient dispersing agent, the stability of the pigment in the high-temperature processing process and the uniform dispersity of the pigment in a polyethylene matrix are effectively improved, so that the color consistency and quality of the color master batch at high temperature are ensured; according to the technical scheme, the mechanical property of the color master batch is enhanced, so that the color master batch is more suitable for high-speed injection molding processing, and the preparation method in the scheme comprises accurate ratio control and efficient mixing and extrusion processes, and particularly adopts an ultrasonic mixing technology and a double-screw extruder.

The invention discloses an anti-fouling curtain structure for water dredging engineering, and belongs to the technical field of environment protection of dredging engineering, the anti-fouling curtain structure for water dredging engineering comprises a floating body, an anti-fouling curtain and a vertical body, the floating body is arranged at the top end of the anti-fouling curtain, the vertical body is arranged at the bottom end of the anti-fouling curtain, and the anti-fouling curtain is geotechnical cloth; the geotechnical cloth is prepared from the following components in parts by weight: 100 to 150 parts of polyester, 20 to 50 parts of copolyester and 5 to 30 parts of inorganic filler, the copolyester is a copolymer of terephthalic acid, 5-sulfoisophthalic acid sodium salt, ethylene glycol and dihydroxyl-terminated polyvinyl imidazole, and the geotechnical cloth is further prepared by a post-treatment step. According to the invention, the copolyester composed of terephthalic acid, sodium 5-sulfoisophthalic acid, ethylene glycol and dihydroxyl-terminated polyvinyl imidazole and the inorganic filler are added into the polyester fiber, and the polyester fiber is modified through a post-treatment step, so that the alkali resistance and the antifouling property of the antifouling curtain are improved.

The invention relates to the technical field of high polymer materials, and discloses a double quaternized QPVBC / QBPEI anion exchange membrane and a preparation method and application thereof.The preparation method comprises the steps that 4-vinyl benzyl chloride, an azo initiator and a free radical polymerization reaction solvent are subjected to free radical polymerization, then quenching, sedimentation and drying are conducted, and poly 4-vinyl benzyl chloride is obtained; the preparation method comprises the following steps: carrying out quaternization on poly (4-vinylbenzyl chloride), a first quaternization reagent and a first organic solvent, and then curing to obtain quaternized poly (4-vinylbenzyl chloride); carrying out condensation reflux on the branched polyethyleneimine, a second quaternization reagent and a second organic solvent, and then carrying out rotary evaporation and drying to obtain quaternized branched polyethyleneimine; and carrying out stirring and cross-linking reaction on the quaternized poly (4-vinyl benzyl chloride), the quaternized branched polyethyleneimine and a third organic solvent to obtain the double quaternized QPVBC / QBPEI anion exchange membrane. The double quaternized QPVBC / QBPEI anion exchange membrane disclosed by the invention has excellent anion transmission capacity and has potential application value in the field of fuel cells.

The invention relates to the technical field of marine coatings, in particular to a high-performance marine coating based on basalt fiber scales and a preparation method of the high-performance marine coating. The high-performance marine coating comprises the following raw materials in parts by weight: 60-80 parts of waterborne epoxy resin, 50-60 parts of water, 20-30 parts of filler, 3-5 parts of a curing agent, 2-4 parts of toner, 0.8-1.2 parts of a flatting agent and 0.8-1.2 parts of a defoaming agent. In the preparation of the marine coating, the filler is added, after the ox horn powder is treated, amino groups of collagen of the ox horn powder are subjected to a free radical grafting reaction to form polyvinyl ester branched chains, and the effect of increasing surface polar groups is achieved, so that hydrogen bond combination with hydroxyl groups of epoxy resin can be formed, and the corrosion resistance of the marine coating is improved. And the coating can be matched with methyl methacrylate to form a coating layer, so that a three-dimensional network structure is formed, the toughness of the coating is effectively improved, and the wear resistance of the marine coating is further improved.

In a first aspect, the invention refers to a consumable hydrogel for ultrasonic conduction characterized in that said hydrogel comprises at least one layer and wherein each layer consists of 3-10% of polyvinyl alcohol (PVA) and 1-15% of 1.2 propanediol and water. In a second aspect, the invention refers to a method of preparation the consumable hydrogel according to the first aspect of the invention. Finally, the invention refers to a use of the consumable hydrogel for ultrasound conduction and the use of the consumable as a coupling agent of an ultrasound medical device.

The invention discloses a water heater inner container and a preparation method and application thereof. The inner container of the water heater comprises a metal pressure bearing layer; the polyethylene bonding layer is arranged on the inner side of the metal pressure-bearing layer, the polyethylene bonding layer is formed by adopting a polyethylene blend, and the polyethylene blend comprises 80-120 parts by weight of polyethylene basic resin, 2-15 parts by weight of a polar material and 0.1-1 part by weight of an antioxidant; and the heat-resistant organic polymer anti-corrosion layer is arranged on one side, far away from the metal pressure-bearing layer, of the polyethylene bonding layer. The polyethylene bonding layer and the heat-resistant organic polymer anti-corrosion layer of the water heater inner container are free of pungent smell, and the safety and sanitation requirements of bath water can be met. Meanwhile, the cohesiveness between the metal pressure-bearing layer and the polyethylene bonding layer of the water heater inner container is high, the delaminating phenomenon cannot occur in the using process, and therefore the requirement for the service life of the water heater inner container is met.

The invention relates to the technical field of high polymer materials, in particular to high-barrier modified polyethylene which comprises high-density polyethylene, vinyl silane, montmorillonite, alkali, an antioxidant, nano silicon dioxide, a polyolefin grafted compound, a plasticizer and a stabilizer. According to the invention, additives such as vinyl silane, modified montmorillonite and the like are introduced into high-density polyethylene, and an irradiation crosslinking process is adopted, so that the gas barrier property and the mechanical property of polyethylene are remarkably improved; through surface modification of the montmorillonite, the compatibility of the montmorillonite and a polyethylene matrix is improved, so that the polyethylene matrix is more uniform in microstructure, and the barrier effect is effectively enhanced; by adopting an irradiation crosslinking technology, not only is the barrier property of polyethylene improved, but also the heat resistance and the mechanical strength of the polyethylene are enhanced, so that the material can keep stable performance in a harsh environment; compared with a traditional modification method, the method has the advantages that the production process is simplified, and the dependence on chemical additives is reduced.

The invention provides a sodium ion battery applying a PTFE / PE asymmetric composite diaphragm, and belongs to the technical field of sodium ion batteries. Comprising a hard carbon positive electrode, a sodium metal negative electrode, electrolyte and a diaphragm, the diaphragm is a PTFE / PE asymmetric composite diaphragm, the PTFE / PE asymmetric composite diaphragm comprises a polyethylene substrate layer and a hydrophilic modified polytetrafluoroethylene functional layer, the contact angle of the hydrophilic modified polytetrafluoroethylene functional layer is smaller than 60, and the porosity is larger than or equal to 60%. The diaphragm in the sodium ion battery can effectively inhibit growth of dendritic crystals and prevent penetration of the dendritic crystals.

The invention relates to the technical field of cables, in particular to a polyvinyl insulation material, a preparation method thereof and a high-voltage direct-current cross-linked cable. The polyvinyl insulation material is prepared from the following preparation raw materials in parts by weight: 90 to 99.4 parts of polyethylene, 0.3 to 3 parts of a cross-linking agent, 0.1 to 3 parts of an assistant cross-linking agent, 0.1 to 1 part of an antioxidant and 0.1 to 3 parts of a voltage stabilizer, wherein the voltage stabilizer comprises one or more of compounds with structures as shown in a formula (I) to a formula (II). The polyvinyl insulation material has excellent compatibility of the components, can effectively restrain the problem that the voltage stabilizer is easy to migrate out, and can effectively ensure the electrical tree resistance of the insulation material and reduce the conductivity and space charge injection.

The present invention provides: a culture medium for culturing hematopoietic stem cells in vitro, the culture medium making it possible to selectively culture hematopoietic stem cells when a cell population containing the hematopoietic stem cells and cancer cells is cultured; and a method for culturing hematopoietic stem cells using the culture medium. The present invention relates to: a culture medium for human cells, the culture medium being intended to be used for culturing a cell population containing human cells, and the culture medium comprising a polyalkylene glycol modified by a copolymer of a polyvinylcaprolactam block and a polyvinyl acetate block, a phosphatidylinositol-3 kinase (PI3K) activator, a TPO receptor agonist, and one or more components selected from the group consisting of a proteasome inhibitor, a TNF-related apoptosis-inducing ligand and a cereblon modulator; and a method for culturing human hematopoietic stem cells, the method comprising culturing a cell population containing human hematopoietic stem cells in the aforementioned culture medium for human cells.

A structure of an asymmetric supercapacitor and a preparation method thereof is disclosed. In some implementations, the preparation comprises the steps of forming a polyaniline (PANI) nanowire on carbon cloth (CC) substrate (PANI / CC) by polymerization of an aniline, depositing a cobalt-nickel layer double hydroxides (CoNi-LDHs) on the PANI / CC by a hydrothermal process, and calcining of the cobalt-nickel layer double hydroxides (CoNi-LDHs) in the PANI / CC at a high temperature to form a metal carbide (CoC@NiC) on the carbon cloth. The structure of the asymmetric supercapacitor includes a metal carbide (CoC@NiC) as a positive electrode, a tungsten trioxide (WO3@C) as a negative electrode, and a poly (vinyl alcohol) / Potassium hydroxide (PVA / KOH) as an electrolyte gel.