846 results about "Polymer substrate" patented technology

The invention belongs to the technical field of flame retardants, and particularly relates to a high-thermal-stability polyphosphate flame retardant and a preparation method thereof. The DOPO is modified through the polyethylene glycol acrylate, methyl methacrylate and dicumyl peroxide composite solution, double bonds of the polyethylene glycol acrylate and P-H bonds of the DOPO can be subjected to nucleophilic addition to form stable C-P bonds, and thermal migration of the DOPO is hindered; dOPO has polymerization double bonds of methyl methacrylate and long carbon chains of polyethylene glycol acrylate, so that the compatibility of the polyphosphate flame retardant and a polymer substrate is improved, and phase separation is avoided; maleic anhydride grafted silicone oil is connected to the surface of an amino modified gamma-cyclodextrin-modified DOPO inclusion compound, so that the polyphosphate flame retardant has high thermal stability and high compatibility after long-chain alkyl modification; amino groups in the modified gamma-cyclodextrin react with maleic anhydride grafted silicone oil to generate an amido bond cross-linked network, so that the thermal migration of DOPO is reduced together, and the high thermal stability of the polyphosphate flame retardant is improved.

Various aspects of this disclosure relate to a layered polymer substrate with electrodes and conductive ink embedded in the substrate. In some embodiments, a prosthetic liner may be bonded onto the polymer substrate. The substrate may include an interconnect coupled to the electrodes via the conductive ink. The system may include a controller (e.g., an electrode controller) in communication with the electrodes via the conductive ink. The electrodes may be activated such that they may stimulate nerve fibers in a user's residual limb.

An automotive glazing includes at least a first substrate of glass or polymer, at least one functional layer having electromagnetic properties, a radar unit and one or more antenna units. At least one de-coated region is defined on the at least one functional layer on the glass or polymer substrate. Further, at least a portion of the antenna unit is aligned with de-coated region and the antenna unit is connected to the radar unit.

The invention relates to the technical field of film material preparation, and discloses a polylactic acid antibacterial packaging film and a preparation method thereof, the polylactic acid antibacterial packaging film comprises the following raw material components by weight: 60-80 parts of polylactic acid, 10-20 parts of polyvinyl alcohol, 10-20 parts of nano zinc oxide, 0.5-1.5 parts of nano cellulose, 1-3 parts of an antibacterial agent, and 10-15 parts of corn starch; the antibacterial agent is prepared from the following components in parts by weight: 5-10 parts of carboxymethylated chitosan and 0.5-2 parts of a dynamic disulfide bond cross-linking agent, the substitution degree of the carboxymethylated chitosan is greater than or equal to 80%, the antibacterial agent is prepared from tea tree essential oil and eugenol, and the dynamic disulfide bond cross-linking agent is bis (3-aminopropyl) disulfide. By adopting a composite system of carboxymethylated chitosan and a dynamic disulfide bond cross-linking agent, the technical effects of humidity-triggered self-repairing and mechanical property synergistic improvement are achieved, and compared with a packaging film with a single polymer base material in the prior art, the problem of antibacterial failure caused by mechanical damage is solved.

Various aspects of this disclosure relate to a layered polymer substrate with electrodes and conductive ink embedded in the substrate. In some embodiments, a prosthetic liner may be bonded onto the polymer substrate. The substrate may include an interconnect coupled to the electrodes via the conductive ink. The system may include a controller (e.g., an electrode controller) in communication with the electrodes via the conductive ink. The electrodes may be activated such that they may stimulate nerve fibers in a user's residual limb.

The invention discloses a composite copper foil current collector and a preparation method thereof, a negative electrode, a lithium ion battery and electric equipment, and belongs to the technical field of batteries. The composite copper foil current collector comprises a polymer composite layer which comprises a polymer layer and a conductive material layer, the polymer layer has two opposite surfaces, and the conductive material layer is attached to at least one surface of the polymer layer; the polymer composite layer is provided with a first surface and a second surface which are opposite; and the copper layer is attached to the first surface and the second surface of the polymer composite layer. The conductive material is introduced to the surface of the polymer base material and then copper plating is performed, so that the binding force is stronger compared with the binding force between the polymer and copper; meanwhile, the conductive material is compounded on the polymer base material and replaces part of the polymer insulating material to form a coherent conductive network, so that the composite copper foil current collector has higher conductivity; volume expansion hardly occurs in the charging and discharging process, active substances are prevented from falling off from the current collector, and the cycling stability of the battery is improved.

The invention discloses a heat-dissipation flame-retardant composite material as well as a preparation method and application thereof, and belongs to the field of functional composite materials. The preparation method comprises the following steps: S1, mixing a ceramic filler with a phosphorus-containing modifier, and carrying out inorganic modification to obtain a first modified filler; s2, mixing the first modified filler with an organic modifier to obtain a second modified filler; s3, mixing the second modified filler with the polymer matrix to obtain the heat-dissipation flame-retardant composite material. The organic modifier is at least one of polysilazane, polysilazane and polysiloxane. The phosphorus-containing modifier and the organic modifier are adopted to modify the ceramic filler, so that the flame retardant property, the thermal stability and the high temperature resistance of the composite material are improved, the compatibility between the ceramic filler and the filler and between the filler and a polymer substrate is improved, the dispersity of the ceramic filler in the polymer substrate is improved, and the thermal resistance of the composite material is reduced; and the heat dissipation capability of the composite material is improved.

The invention provides a multifunctional passive cooling optical metamaterial fiber, yarn and fabric and a preparation method thereof. The passive cooling optical metamaterial fiber is composed of high-refractive-index inorganic micro-nano particles and / or a micro-nano functional material and a polymer substrate material. Wherein wavelength / sub-wavelength scale micro-nano particles are uniformly distributed in a substrate material as a random scattering medium to form a random optical metamaterial system, and reflection enhancement of the optical metamaterial fabric in a solar spectrum band is realized by utilizing a multiple Mie resonance collective effect. According to the passive cooling optical metamaterial fiber, a circular structure, a skin-core structure and the like are prepared through melt spinning, high-refractive-index inorganic micro-nano particles are added into a skin layer and used for sunlight band wide spectrum regulation and control, and a micro-nano functional material is added into a core layer, so that multiple functions are effectively achieved.

A functional ultrathin battery separator and method for fabricating the same is disclosed. The battery separator includes a polymer substrate that is flexible, and a functional barrier layer deposed on the polymer substrate. The functional barrier layer is polycrystalline and includes a metal-organic framework and a plurality of micropores. The functional barrier layer is able to flex with the polymer substrate. The functional barrier layer is compact, such that diffusion pathways through the functional barrier layer are limited to a cutoff size, and such that the diffusion pathways that are largest are located within grains of the polycrystalline functional barrier layer rather than between grains. The battery separator may be less than 10 μm thick, and the polymer substrate may be less than 9 μm thick. The metal-organic framework may be ZIF-8, and the functional barrier layer may be less than 2 μm thick.

A method for depositing a metal compound coating on the surface of a polymer base material at low temperature comprises the following steps: placing the polymer base material in an atomic layer deposition chamber, vacuumizing, and adjusting the temperature and pressure of the chamber; activating the surface of the polymer base material by using plasma; injecting a metal organic precursor into the reaction cavity in a pulse manner at the temperature lower than 300 DEG C, and forming a uniform metal compound coating through plasma enhanced atomic layer deposition; and the redundant precursor is purged through gas, and the steps are repeated until the coating with the target thickness is obtained. According to the method, the surface of the plastic base material is modified under the condition that the temperature is lower than 300 DEG C through a plasma enhanced atomic layer deposition (PEALD) technology, the metal compound coating which is uniform in thickness and controllable in component is obtained, and the requirement for improving the biocompatibility of the surface of the implant in the medical field is met.

The invention relates to a soft electronic device based on a particle phagocytosis effect and a preparation method thereof, and the preparation method comprises the following steps: S1, attaching a hollow mask plate to a polymer substrate, and controlling the position where the polymer substrate can be printed; s2, uniformly dispersing micro-nano particles on the mask plate, wherein the micro-nano particles are in contact with the polymer substrate at the hollowed-out part of the hollowed-out mask plate; s3, after the micro-nano particles make contact with the polymer substrate, the micro-nano particles gradually enter the polymer substrate through the particle phagocytosis effect, and a functional composite material is formed; and S4, removing the hollow mask plate to form the soft electronic device. According to the method, the micro / nano material is directly printed in the soft polymer matrix without introducing a solvent, so that chemical incompatibility and complex fluid dynamic behaviors are avoided. The surface energy-driven particle phagocytosis phenomenon is utilized to realize deep embedding of the material, spontaneous generation is realized, and additional introduction of energy is not needed. Different materials can be seamlessly integrated into the high-performance elastic electronic equipment. Multi-material wireless electronic equipment is created through a multi-layer phagocytic printing technology, and layered printing can be achieved.

The invention relates to the technical field of membranes, in particular to a photocatalytic self-cleaning BiOCl / COF composite membrane as well as a preparation method and application thereof. BiOCl nanosheets and COF nanosheets with photocatalytic characteristics are synthesized respectively, the two nanosheets are deposited on the surface of a polymer substrate film through a vacuum filtration technology, and due to the fact that a large number of oxygen-containing groups in the COF nanosheets improve the dispersity of the bismuth oxychloride nanosheets through hydrogen-bond interaction, disordered stacking of BiOCl in the stacking process is reduced, and the photocatalytic performance of the BiOCl nanosheets is improved. The COF is added to assist the bismuth oxychloride nanosheets in forming an interlayer channel with a screening effect, and the two nanosheets form a heterostructure, so that the photocatalytic capability of the composite film is enhanced. The preparation method of the composite membrane is simple, and the composite membrane has good permeability to Evans blue, Congo red, rhodamine B and other dyes, has excellent photocatalytic self-cleaning ability, and can be applied to separation of organic wastewater generated in the printing and dyeing industry.

The invention relates to the technical field of electrode plates, and discloses a dual-electrode plate of a solid-state lithium metal battery and a preparation method of the dual-electrode plate. Comprising the following operation steps: depositing nano-copper on one side of a polymer base material layer to obtain a copper base layer; further depositing foamy copper on the surface of the copper base layer to obtain a foamy copper layer; a pole piece A is formed; depositing metal aluminum on the other side of the polymer base material layer in the pole piece A to obtain an aluminum layer; a pole piece B is formed; depositing metal lithium on the surface of the foamy copper layer in the pole piece B to obtain a metal lithium layer; further coating the surface of the lithium metal layer with an organic solution, and drying to obtain a polymer solid electrolyte layer; a pole piece C is formed; coating the surface of the aluminum layer in the pole piece C with positive active slurry, and drying to obtain a positive active material layer which is taken as a pole piece D; and rolling the pole piece D, respectively carrying out transfer welding on the aluminum layer on the positive electrode side and the copper layer on the negative electrode side, and leading out a metal foil tab to obtain the dual-electrode pole piece of the solid-state lithium metal battery.

An antenna assembly includes a backplane and a polymer substrate mounted over the backplane to define an air gap there-between. The polymer substrate supports radiating elements comprising a polymer-based waveguide feed stalk and a polymer-based pair of radiating arms supported by and electrically coupled to the waveguide feed stalk. A conductive layer is formed on the polymer substrate such that the conductive layer faces the backplane. A phase shifter including a movable element such as a dielectric member or trombone member may be positioned in the air gap for adjusting the phase of a radiating element or a phase shifter assembly may be positioned to the back side of the back plane.

The invention discloses a polymer stationary phase carrier for DNA synthesis as well as a preparation method and application of the polymer stationary phase carrier. The polymer stationary phase carrier comprises a polymer substrate, and the surface of the polymer substrate is provided with active functional groups such as ester groups, carboxyl groups, halogen or hydroxyl groups, so that the polymer substrate can be modified; the surface of the polymer substrate is modified with a first functional group, the first functional group is covalently bonded with the polymer substrate, and the first functional group is a functional group capable of reacting with an ester group, a carboxyl group or halogen; the surface of the polymer substrate is also modified with a functional group, and the functional group is a group capable of generating a click reaction; the polymer stationary phase carrier further comprises an initiation chain coupled to the polymer substrate through the functional group; and the initiating chain is coupled with the surface of the polymer substrate with the modified functional group through the second functional group. The stationary phase carrier disclosed by the invention can be used for carrying out a biological DNA synthesis reaction, and has relatively high yield and accuracy.

A separator for a secondary battery comprising a porous polymer substrate; a first layer on at least one surface of the porous polymer substrate, wherein the first layer includes inorganic particles and a nonparticulate acrylic polymer having a glass transition temperature of 15° C. or less, wherein the nonparticulate acrylic polymer connects and fixes the inorganic particles; and a second layer on an upper surface of the first layer, wherein the second layer includes a particulate acrylic polymer having a glass transition temperature of 20°° C. to 50° C. The separator for a secondary battery has good adhesion with the electrode and can solve the resistance problem in the presence of the inorganic particles.

The invention relates to the technical field of mechanical parts, and discloses a high-bearing engineering plastic worm gear applied to a light truck electric power steering system and a manufacturing process, and the manufacturing process comprises the following steps: pretreatment of a polymer base material, preparation of a composite reinforcing material, preparation of an injection molding raw material, precise injection molding, post-treatment and detection. After a polymer base material is subjected to fluorination activation treatment, the surface energy of the material is reduced, the interfacial compatibility with a composite reinforced material is enhanced, and through the synergistic effect of chemical bonding and physical anchoring formed between matrix resin and a modified reinforcement body, the interfacial layering tendency of engineering plastic and a fiber reinforced phase is overcome, so that stress transmission is more uniform; meanwhile, the functional additive components generate an in-situ synergistic effect in the precise injection molding process, and form a multi-stage enhanced network with matrix resin, so that the worm wheel matrix is endowed with excellent overall bearing strength and fatigue fracture resistance, and the structural integrity under the working conditions of high load and high-frequency steering is ensured.

The invention relates to a polyamide composite membrane containing a middle layer and a preparation method of the polyamide composite membrane. The polyamide composite membrane comprises a polyborosiloxane-based porous polymer substrate, a modified polyimide middle layer and a polyamide separation layer, a modified polyimide intermediate layer is loaded on the surface of the porous polymer substrate, and a polyamide separation layer is loaded on the surface of the modified polyimide intermediate layer. The polyborosiloxane-based porous polymer substrate and the modified polyimide intermediate layer have better compatibility, interface defects can be reduced, the overall performance of the membrane can be improved, moreover, the polyborosiloxane-based porous polymer substrate also has a self-healing characteristic, and after the polyborosiloxane-based porous polymer substrate is damaged, the self-healing property of the polyborosiloxane-based porous polymer substrate is improved. Fractured connection can be repaired without external stimulation (such as light and heat), and self-repairing of the substrate is achieved.

The invention discloses a polysilsesquioxane / polyether-ether-ketone composite membrane, a preparation method thereof and application of the polysilsesquioxane / polyether-ether-ketone composite membrane in organic mixed solvent separation, and aims to solve the problem of large-area deposition of a defect-free polysilsesquioxane hybrid membrane on a polymer substrate in the prior art. According to the present invention, the 1, 2-bis (triethoxysilyl) ethane polysilsesquioxane precursor is adopted as the raw material to prepare the membrane material, the new membrane preparation method is provided, the processing process is designed and optimized from the aspects of the simplicity and convenience of the membrane preparation process, the industrialization of the membrane separation technology, the improvement of the membrane preparation efficiency and the like, the membrane preparation efficiency is improved, and the certain separation performance is provided; the method has an excellent effect on separation and recovery of methanol / toluene and methanol / dimethyl carbonate.

The present invention discloses a method for preparing a high-safety composite lithium metal negative electrode and a negative electrode interface-derived solid-state battery. The high-safety composite lithium metal negative electrode is composed of lithium metal, metal X and a polymer substrate film. The polymer substrate film is a polymer film modified with polar functional groups. There is a strong interaction between the polar functional groups and the metal layer X, which acts as a molecular welding agent to anchor the metal layer. The lithium metal and the metal layer X spontaneously form an alloy layer, thereby obtaining a chemically connected multilayer composite lithium metal negative electrode, which helps to improve the problem of mechanical pulverization of lithium metal during long-term cycling. The present invention proposes an innovative solid-state battery preparation strategy. Through the catalytic action of the alloy compound, the formation of a solid electrolyte is directly promoted on the negative electrode side, thereby achieving a close combination of the negative electrode and the solid electrolyte interface. By optimizing material selection and preparation process, the present invention can further improve the performance of solid-state batteries and meet the growing demand for energy storage.

Disclosed is a separator for an electrochemical device, the separator including a porous polymer substrate and a porous coating layer formed on at least one surface of the porous polymer substrate. The porous coating layer contains a polymer binder, inorganic particles, and an organic filler, the polymer binder being contained in an amount of 1 to 10 parts by weight based on the total weight of the porous coating layer, and the inorganic particles have a packing density of 2 g / cm3 or more to 2.5 g / cm3 or less.

A separator for an electrochemical device having a porous polymer substrate having a plurality of pores; and a porous coating layer formed on at least one surface of the porous polymer substrate. The porous coating layer includes a dispersing agent, a mixture of inorganic particles and a particle-type binder polymer, and a polyvinyl pyrrolidone binder polymer positioned on the whole or a part of the surface of the inorganic particles in the mixture of the porous coating layer to connect and fix the inorganic particles with one another. The content of the polyvinyl pyrrolidone binder polymer is 2 to 20 parts by weight based on 100 parts by weight of the total content of the particle-type binder polymer and the polyvinyl pyrrolidone binder polymer.

The invention belongs to the technical field of electronic packaging materials. The invention relates to the field of electronic packaging, in particular to a flexible high-barrier film for electronic packaging and a preparation method thereof. The preparation method comprises the following specific preparation steps: substrate activation: activating the upper surface and the lower surface of a polymer substrate to regulate the surface energy of the two surfaces to be greater than or equal to 50mN / m respectively, so as to obtain an activated substrate; coating an organic buffer layer: coating a water-based organic coating on the two surfaces of the activated substrate, and curing and forming to obtain the organic buffer layer with the water content of 15-20%, the thickness of 10-15 microns and the roughness Ra of 0.08-0.12 microns; depositing an inorganic layer: pulse gaseous trimethylaluminum and tetraethoxysilane mixed gas on the surface of the organic buffer layer, then pulse with water vapor, and circulating the pulse so as to deposit the inorganic layer with the thickness of 15-20nm on the surface of the organic buffer layer; and stacking and packaging: stacking the organic buffer layer and the inorganic layer for 8-10 cycles, then covering the organic buffer layer and the inorganic layer with a UV curing adhesive, and annealing to obtain the flexible high-barrier film for electronic packaging.

The present disclosure relates to the technical field of film material, and particularly to a polymeric polyphenol-modified polymer film, a preparation method thereof and a metallized polymer film. According to the present disclosure, corona treatment is performed to a surface of a polymer layer, so that a polar modifying liquid can uniformly coat the surface of the polymer layer, thereby forming a modification layer tightly combined with the polymer layer. Thus, the low-polarity polymer layer surface can be imparted with a durable high polarity. Consequently, the polymer layer is capable of being stably and tightly bonded to a material layer with high polarity and high surface tension, such as a metal layer, for a long period of time, effectively broadening the application scenarios for non-polar polymer substrate layers. By controlling the concentrations of the polyphenolic compound and the cross-linking agent in the modifying liquid, the modification layer formed by a cross-linking reaction can have a suitable cross-linking density and an adequate number of hydroxyl groups, thereby further effectively and stably enhancing the long-term polarity and surface tension of the polymer layer. The preparation method is simple and easy to operate, cost-effective, efficient, and easy to scale up.

The invention relates to a high-voltage polyoxyethylene (PEO)-based solid electrolyte and a preparation method thereof, and belongs to the technical field of solid-state battery materials. The electrolyte is composed of a polymer substrate, an inorganic filler, a cosolvent and a lithium salt, the polymer substrate is a PEO-polyacrylonitrile (PAN) composite substrate; the inorganic filler is lithium titanium aluminum phosphate LATP, and the cosolvent is fluoroethylene carbonate FEC; the lithium salt is lithium bis (trifluoromethanesulfonic acid) imide LiTFSI and lithium difluoro (oxalato) borate LiDFOB; the dispersing agent is acetonitrile ACN. The method has the advantages that PEO and FEC are complexed to form a new structure, and room-temperature efficient operation of a single-salt (LiTFSI) system is realized; and meanwhile, LiDFOB is cooperatively introduced to construct a stable passivation layer on a positive electrode interface, FEC synchronously induces to generate LiF-rich stable SEI on a lithium negative electrode, and the interface compatibility and electrochemical stability of the electrolyte to a high-voltage electrode are remarkably improved.

The invention relates to the technical field of surface resistance reduction, in particular to a resistance reduction structural member with a surface microstructure and a preparation method and application thereof, which can effectively prolong the residence time of bubbles and an air film on a resistance reduction surface so as to reduce the loss and deterioration of resistance reduction performance. A resistance reduction structural member with a surface microstructure comprises a first polymer substrate and a plurality of protrusions arranged on the surface of the first polymer substrate in a protruding mode, and each protrusion comprises a second polymer substrate and nanoparticles arranged on the surface of the second polymer substrate in a protruding mode; wherein the nanoparticles at least comprise hydrophobic nanoparticles, and the outer contour of the second polymer substrate is a spherical surface.

The invention relates to a composite copper foil and a preparation method and application thereof, and the preparation method of the composite copper foil comprises the following steps: (1) depositing a copper layer on a polymer substrate by magnetron sputtering, and then coating a self-assembly molecular transition layer on the polymer substrate deposited with the copper layer through liquid-phase soaking treatment or vapor deposition treatment, a composite structure layer is obtained; and (2) sequentially carrying out water electroplating treatment and post-treatment on the composite structure layer obtained in the step (1) to obtain the composite copper foil. The surface of the magnetron sputtering metal layer is modified with chemical molecules with high binding force with metal copper to serve as a transition layer, the binding force of the magnetron sputtering metal layer and a hydroelectric plating layer is enhanced, and the mechanical property and the electrical property of the composite copper foil are improved in combination with optimization of a hydroelectric plating process and a formula.

The invention belongs to the technical field of lithium batteries, and particularly relates to a composite ceramic solid electrolyte diaphragm material and a preparation method and application thereof. Wherein the lithium ion conductor filler is LLZTO (lithium zinc oxide) nano particles coated with polydopamine; the mass dosage of the polydopamine is not more than 2 times that of the LLZTO nanoparticles, and the thickness of a coating layer formed by the polydopamine is less than 10nm. Compared with the prior art, the problems of dispersity and contact of nano solid electrolyte particles in a polymer substrate in the prior art are solved. According to the scheme, the contact interface of LLZTO nanoparticles and PVDF-HFP is optimized by introducing the interface layer and particularly utilizing the bidirectional cohesiveness of polydopamine, and the distribution of the nanofiller in a polymer is improved.

The invention provides core-skin resin particles and a preparation method thereof, a foam material and a composite foam material. The core-skin resin particles are prepared by adopting a co-extrusion process, and the polymer base material and the conductive filler are selectively distributed in the skin layer and the core part, so that the structural design that a conductive part is separated from an insulating part is realized. In addition, the obtained core-skin resin particles are foamed through a physical foaming process, the purpose of light weight of the material is achieved, and the core part of the obtained foamed bead improves the electromagnetic shielding absorption characteristic of the material. Furthermore, the foamed beads obtained by the invention can be subjected to molding treatment, so that a molded part with a designable shape and insulating and electromagnetic shielding properties can be obtained.

The invention provides a three-dimensional composite solid electrolyte membrane, a preparation method thereof and an all-solid-state lithium metal battery. Comprising a homogeneous gel buffer layer, a porous middle layer and a polymer substrate layer which are stacked. In the three-dimensional composite solid electrolyte membrane, the homogeneous gel buffer layer has relatively high mechanical strength and elastic modulus, and can prevent lithium dendrites from puncturing the diaphragm to cause short circuit of the battery; the porous middle layer can increase the contact area between the film layers on the two sides and the electrode, more transmission channels are provided for lithium ions, transmission resistance is reduced, the ionic conductivity is improved, the battery can be charged and discharged more rapidly, the rate performance of the battery is improved, meanwhile, the excellent mechanical stability is achieved, and the cycle life of the battery is prolonged; the polymer substrate layer has excellent mechanical strength and interface stability. The three film layers cooperate to effectively inhibit chemical side reactions between the three-dimensional composite solid electrolyte film and the positive and negative electrodes, reduce the interface impedance and improve the overall electrochemical performance of the battery.