36 results about "Polymer nanocomposite" patented technology

The invention relates to the technical field of photo-thermal gas treatment, in particular to a pH response type conjugated polymer nano-composite particle as well as a preparation method and application thereof, and develops a conjugated polymer nano-composite particle IN-20-(NH4) 2S capable of intelligently responding to acidic pH in a tumor microenvironment, which is used for photo-thermal and gas synergistic treatment of tumors. The nanoparticles generate heat under NIR-II light induction to promote the conjugated polymer composite material to release (NH4) 2S, the (NH4) 2S responds to acidic pH and can react with acid to generate H2S, the concentration of the (NH4) 2S is gradually increased along with time, the release amount of the (NH4) 2S is more remarkable under the illumination condition, and a new strategy is provided for enhancing the accuracy and effectiveness of tumor treatment.

Materials are provided that can be used for electromagnetic interference (EMI) shielding, and methods of fabricating the same and methods of using the same are also provided. Polymer-based fiber thin films can have superior electrical conductivity and excellent EMI shielding efficiency while being ultra-flexible and ultra-lightweight. The fiber thin films can be dual polymer thin films and can incorporate quantum dots (QDs) (e.g., magnetic quantum dots) and / or two-dimensional (2D) conductive nanomaterials within a dual polymer matrix comprising a conductive polymer and a nonconductive polymer. The resultant composite thin film can have low density, high porosity, and high electrical conductivity.

Materials are provided that can be used for electromagnetic interference (EMI) shielding, and methods of fabricating the same and methods of using the same are also provided. Polymer-based fiber thin films can have superior electrical conductivity and excellent EMI shielding efficiency while being ultra-flexible and ultra-lightweight. The fiber thin films can be dual polymer thin films and can incorporate quantum dots (QDs) (e.g., magnetic quantum dots) and / or two-dimensional (2D) conductive nanomaterials within a dual polymer matrix comprising a conductive polymer and a nonconductive polymer. The resultant composite thin film can have low density, high porosity, and high electrical conductivity.

Methods for forming via openings by using a lamellar triblock copolymer, a polymer nanocomposite, and a mixed epitaxy approach are disclosed. An example method includes forming a guiding pattern (e.g., a topographical guiding pattern, chemical guiding pattern, or mixed guiding pattern) on a surface of a layer of an IC device, forming lamellar structures based on the guiding pattern by using the lamellar triblock copolymer or forming cylindrical structures based on the guiding pattern by using the polymer nanocomposite, and forming via openings by removing a lamella from each of at least some of the lamellar structures or removing a nanoparticle from each of at least some of the cylindrical structures.

The application discloses a dielectric breakdown field strength and temperature dependence simulation method and system, and the simulation method comprises the following steps: establishing a criterion for polymer damage caused by molecular chain slip under the action of heat based on a free volume theory; establishing a breakdown criterion for polymer damage caused by molecular chain slip under the joint action of an electric field and a thermal field; quantifying the serpentine movement of a molecular chain under the action of a strong force; establishing an approximate analytical expression of polymer breakdown strength; and fitting the experimental results of sample breakdown field strength change with temperature according to the analytical expression by using a Curve fitting tool of Matlab. The breakdown model established from the perspective of molecular chain displacement can well explain the change relationship between the polymer nanocomposite dielectric breakdown field strength and temperature, and provides theoretical guidance for the preparation of high-temperature dielectric materials.

The application discloses a recyclable Fe3O4 polymer nanocomposite pour point depressant, a preparation method and application thereof, and belongs to the technical field of crude oil pour point and viscosity reduction. The preparation method of the Fe3O4 polymer nanocomposite pour point depressant comprises the following steps: (1) preparing hydrophobic Fe3O4 nanoparticles by using a coprecipitation method; (2) performing a free radical polymerization reaction on the hydrophobic Fe3O4 nanoparticles and grafting materials to obtain polymer-modified magnetic nanoparticles; and (3) dispersing the polymer-modified magnetic nanoparticles and ethylene-vinyl acetate copolymer in an organic solvent to obtain the Fe3O4 polymer nanocomposite pour point depressant. The prepared composite pour point depressant can effectively improve the low-temperature fluidity of crude oil, can be recycled, and reduces the refining cost of crude oil and the preparation cost of the reagent.

The invention provides a nickel-doped cobalt oxide-based nano material and a preparation method thereof, and a polymer nano composite material and a preparation method and application thereof, and relates to the technical field of lubricating and sealing materials. The preparation method comprises the following steps: mixing oxalic acid, water and soluble metal salts (including cobalt salt and nickel salt) for precipitation reaction, and drying and calcining the obtained precipitate to obtain the nickel-doped cobalt oxide-based nano material. The nano-material is introduced into a polymer material, and in the friction process, alkane and other molecular chain carbon-hydrogen bonds in lubricating oil are activated and subjected to dehydrogenation, carbon chain breakage and carbon-carbon rearrangement reaction by means of the catalytic action of the nano-material; a double-layer structure boundary lubricating film with the upper layer being a highly graphitized carbon-based lubricating layer randomly inlaid with nickel-doped cobalt oxide-based nanocrystals and the lower layer mainly being nickel-doped cobalt oxide-based nanocrystals is generated on the metal dual surface in situ, and the lubricating film has excellent bearing capacity and self-lubricating and self-adaptive self-repairing characteristics; and the polymer nano composite material shows extremely low frictional wear property.

Aspects of the present application allow for the measurement of a calibration resistance of a resistive film in a sensing element, such that the effects of contact resistance and background resistance drift due to factors such as temperature, strain, or aging can be reduced or eliminated. In some embodiments, a contact resistance independent resistance of a reference portion of a resistive film can be determined by taking a plurality of two-terminal resistance measurements between a plurality of electrode pairs on the resistive film. Furthermore, a contact resistance independent resistance of a sensing portion of the resistive film can be determined based on the plurality of two-terminal resistance measurements between the electrode pairs. The resistance of the reference portion can be removed from the measured resistance of the sensing portion, such that changes in the reference portion resistance that are not caused by sensing environmental conditions can be compensated for.

The invention belongs to the technical field of catalysis, and discloses an oxide-nitrogen-containing intrinsic microporous polymer nano composite carrier supported palladium catalyst as well as a preparation method and application thereof. The catalyst takes an inorganic nano oxide as a matrix, nitrogen-containing intrinsic microporous macromolecules are deposited on the surface of the matrix to form a composite carrier with a dual-distribution pore structure, the inorganic oxide provides macropores, and the macromolecules provide micropores; the nitrogen-containing intrinsic microporous polymer contains a tertiary amine structural unit, and nitrogen atoms of the tertiary amine structural unit are coordinated with palladium nanoparticles, so that anchoring and high dispersion of palladium are realized. The preparation method of the catalyst comprises the following steps: firstly synthesizing a nitrogen-containing intrinsic microporous polymer, then compounding the nitrogen-containing intrinsic microporous polymer with an oxide to prepare a carrier, and finally loading a palladium precursor and performing hydrogen reduction. The catalyst shows high conversion rate, high selectivity and excellent cycle stability in styrene oxide hydrogenation, acrylonitrile hydrogenation and phenylacetylene hydrogenation reactions, the preparation process is simple and convenient, and the catalyst has a good industrial application prospect.

Provided is a flexible organic light emitting element that may include a flexible substrate, a circuit element layer on the flexible substrate, an emission layer on the circuit element layer, a first encapsulation structure between the flexible substrate and the circuit element layer, and a second encapsulation structure on the emission layer, wherein the first encapsulation structure includes a first inorganic layer and a first organic layer, which are sequentially stacked on an upper surface of the flexible substrate, and the first organic layer includes a first polymer nanocomposite.

The invention "Manufacturing an antibacterial nanocomposite coating based on water-based polyurethane / double hydroxide layer reinforced with an antimicrobial copolymer with the ability to prevent bacterial growth" relates to the field of the medical industry, coatings and coverings; and also relates to the field of medical equipment for the production of antibacterial polymer nanocomposites that inhibit bacterial growth. This nanocomposite coating consists of three different layers with antibacterial properties, each layer performing a different function in destroying bacteria. The first layer uses water-based polyurethane modified with chitosan and polyvinyl alcohol; the second layer uses layered double hydroxide modified with the antibacterial agent cetyltrimethylammonium bromide (cetolone); and finally, the third layer uses an antimicrobial polypropylene-ethylene copolymer (PP-R), which are mixed together to form an antibacterial nanocomposite coating.

The application discloses a method and device for analyzing the Young's modulus of an interface region of a polymer nanocomposite dielectric, wherein the method uses a Monte Carlo method to construct a three-dimensional structure model of the polymer nanocomposite dielectric, simulates a stress and strain field and an effective Young's modulus of the polymer nanocomposite dielectric with high throughput, simulates the effective Young's modulus of the polymer nanocomposite dielectric with high throughput in combination with an effective medium theory, and inversely obtains a Young's modulus distribution characteristic of the interface region. The method establishes a correlation between the mesoscopic characteristics of the interface region and macroscopic mechanical properties, provides theoretical and method support for research and development of high-performance electrical insulating materials, and is helpful to development of dielectric capacitors with high breakdown strength and energy storage density.

The present application relates to the field of material analysis, in particular to a kind of quantitative analysis method of bridging chain mechanics contribution in polymer nanocomposite material.The quantitative analysis method provided by the present application realizes the quantitative analysis of bridging chain mechanics contribution by artificially constructing the model of bridging chain structure, in combination with the accurate tracking of known particle number and local stress decomposition technology, establishes the quantitative relationship between "bridging chain structure-mechanics contribution", provides analysis tool and theoretical basis for rational design of high-performance nanocomposite material.

The present disclosure encompasses polymer nanocomposites and methods of use thereof.

The invention discloses a preparation method of a polyethylene-poly (butylene adipate / terephthalate)-carbon nanofiber composite material, which is characterized in that PE / PBAT / CNFs are used as basic raw materials, the CNFs are subjected to surface modification through dopamine, and a compatilizer is introduced, so that the interfacial compatibility of PE and PBAT is optimized, and the high-impact PE-based ternary nanocomposite material is successfully prepared. The method provides a theoretical basis for designing a high-performance polymer nano-composite system, and has application value in the fields of green packaging, engineering plastics and the like. The comprehensive mechanical property of the prepared composite material is the best and is greatly improved compared with that of a PE matrix; a denser network structure is formed in a local area, the interface area is increased, the enhanced interface interaction is beneficial to energy absorption and plastic deformation, and the impact resistance of the material is improved.

The present application relates to the technical field of polymer preparation, in particular to an antibacterial polymer nanocomposite material and a preparation method thereof.The material takes polyhydroxybutyrate and polybutylene adipate terephthalate as a matrix, fuses a non-metallic organic framework antibacterial agent, a non-peptide antibacterial mimic and a photothermal response nanomaterial, wherein the non-metallic organic framework antibacterial agent and the non-peptide mimic synergistically play a chemical sterilization role, and the photothermal response nanomaterial improves the sterilization efficiency through physical thermal effect, so that the material provided by the present application can realize broad-spectrum, efficient and persistent antibacterial effect through the organic combination of multiple antibacterial mechanisms.The material provides a high-efficiency antibacterial solution of multiple mechanism synergy in view of the defects of single antibacterial mechanism and non-persistent effect of traditional materials, and is suitable for medical and packaging fields, and has significant economic value and application prospect.

Aspects of the present disclosure include compositions of and methods for producing a polymer-polysaccharide nanocomposite resin, including polymerizing an alkane diol monomer and an alkane diacid agent monomer in a mixture comprising dispersed polysaccharide nanocrystals, a catalyst and one or more optional additives under conditions sufficient to produce a polymer-polysaccharide nanocomposite resin. Aspects of the present disclosure further include compositions of and methods for producing a polybutylene succinate nanocomposite, including dispersing cellulose nanocrystals in 1,4 butanediol (BDO) to form a cellulose-BDO dispersion and esterifying the cellulose-BDO dispersion and succinate anhydride to form a plurality of polybutylene succinate oligomers. The polybutylene succinate oligomers are condensed to form a polybutylene succinate nanocomposite.

A method of fabricating a polymer composite material by mixing a polymer material with a planar material, depositing the mixture on a substrate, and stretching the resulting thin film, is described. Polymer composite materials produced using said method and ballistic resistant materials comprising said polymer composite materials are also described.

The present invention relates to a foil sensor for force detection with direct force transducer, with a corresponding electrical contact line for detecting forces and force loads, wherein an electrical signal can be derived from the foil sensor for force detection with direct force transducer. At least two conductive electrodes (12) are applied to the plastic film material (11), each having a contact area (13) at its leads. A direct force sensor (21) is mounted on the surface of the plastic film material (11) facing the conductive electrodes (12). The direct force sensor detects the mechanical forces acting on the surface and deforms elastically under the influence of force. The direct force sensor (21) does not cover the conductive electrodes (12) or only partially covers them, and it also does not cover the contact area (13). A polymer nanocomposite material (31) is also applied to this surface of the plastic film material (11), the surface facing the conductive electrodes (12), in particular such that the conductive electrodes (12) are completely or predominantly covered by the polymer nanocomposite material (31). The polymer nanocomposite material (31) does not touch the direct force transducer (21) or only partially, thereby creating a free space (32) between the polymer nanocomposite material (31) and the direct force transducer (21). The elastic material compression of the polymer nanocomposite (31) can be detected by means of an impedance and / or electrical resistance measurement via the conductive electrodes (12).

Disclosed are a self-healing memory device including a lower electrode; a polymer nanocomposite layer formed on the lower electrode, wherein, when a structural defect occurs, the polymer nanocomposite layer repairs the structural defect and restores a memory function damaged due to the structural defect through a self-healing mechanism characterized by movement of a polymer material and hydrogen bonding; and an upper electrode formed on the polymer nanocomposite layer and a method of manufacturing the self-healing memory device.

Such a force-measuring washer with a polymer nanocomposite-based detector allows for the detection of higher forces. The material of the grooved washer (11), located next to the plastic film (12) with conductive electrodes (13), absorbs the directly acting forces and deforms elastically according to its material properties. The corresponding deflection of the grooved washer material (11) results in a direct force being applied to the polymer nanocomposite film (14), which is also elastically compressed. This compression change of the polymer nanocomposite film (14) leads to a change in the electric field and / or the electrical resistance induced by the conductive electrodes (13), measured between the at least two conductive electrodes (13), which are preferably configured as an interdigital electrode structure (IDES).

The aspects of this disclosure include compositions and methods for producing a polymer-polysaccharide nanocomposite resin, including the preparation of a dispersion comprising polysaccharide nanocrystals, an alkanediol monomer, and an alkanediacid agent monomer; and polycondensation of the alkanediol monomer and the alkanediacid agent monomer in the dispersion to produce a polymer-polysaccharide nanocomposite resin. The aspects of this disclosure further include compositions and methods for producing a polybutylene succinate nanocomposite, including dispersing cellulose nanocrystals in 1,4-butanediol (BDO) to form a cellulose-BDO dispersion and esterifying the cellulose-BDO dispersion with succinate anhydride to form a plurality of polybutylene succinate oligomers. The polybutylene succinate oligomers are then condensed to form a polybutylene succinate nanocomposite.

To provide a method for forming via openings by using a lamellar triblock copolymer, a polymer nanocomposite, and a mixed epitaxy approach.SOLUTION: A method for forming via openings by using a lamellar triblock copolymer, a polymer nanocomposite, and a mixed epitaxy approach includes the steps of: forming a guiding pattern (e.g., a topographical guiding pattern, chemical guiding pattern, or mixed guiding pattern) on a surface of a layer of an IC device 400; forming lamellar structures 410 based on the guiding pattern by using the lamellar triblock copolymer or forming cylindrical structures based on the guiding pattern by using the polymer nanocomposite; and forming via openings by removing a lamella 430 from each of at least some of the lamellar structures or removing a nanoparticle from each of at least some of the cylindrical structures.SELECTED DRAWING: Figure 4

The present application belongs to the technical field of polymer nanocomposites, and particularly relates to a modified aramid nanofiber and a preparation method thereof. The present application obtains the carbon nanotube modified aramid nanofiber through the following steps: mechanically refining and KOH / DMAC chemical pretreatment of aramid fibers, carboxylation of carbon nanotubes, and intercalation of the carboxylated carbon nanotubes and the pretreated aramid fibers through low-pressure homogenization, ultrasonic chemical bonding, and high-pressure homogenization. Through the synergistic effect of each stage, the dispersion uniformity, interface bonding strength and anti-shedding performance of the carbon nanotubes in the aramid nanofiber are significantly improved, and the aramid nanofiber is endowed with multifunctional properties such as electrical conductivity and thermal conductivity. The method is continuous in process, simple in operation, and suitable for large-scale production.

The application discloses an azobenzene polymer nanocomposite and application thereof, wherein the azobenzene polymer nanocomposite is composed of two parts: an azobenzene small molecule matrix or an azobenzene polymer matrix and nano-silica particles with surface grafted azobenzene polymer. Azobenzene groups can reversibly undergo cis-trans isomerization under the irradiation of ultraviolet light and visible light; the composite material exhibits a solid state in the trans state, and due to the presence of nano-particles, the cohesive energy is improved, so that the composite material has strong adhesion and can bear a large load; the composite material exhibits a liquid state in the cis state, and the adhesion is greatly reduced, that is, photoisomerization can cause load reduction. The introduction of SiO2@PAzo solves the problems of insufficient bonding strength, low reversible efficiency and the like of conventional reversible adhesives.

This invention discloses a method for preparing a core-shell porous polymer / aromatic heterocyclic polymer nanocomposite solvent-resistant nanofiltration membrane. First, porous polymer nanoparticles are composited with an amino polymer to synthesize core-shell porous polymer nanoparticles. Then, these nanoparticles are chemically crosslinked with the prepared aromatic heterocyclic polymer nanomaterials and a crosslinking agent to form a nanocomposite dispersion. Finally, the nanocomposite dispersion is directly coated onto the surface of a nonwoven fabric and then heat-treated to form a membrane. This invention is simple, controllable, and easy to scale up. The prepared membrane maintains high permeability selectivity and solvent resistance stability during long-term service, showing good prospects for industrial production and application.

The invention relates to a graphene oxide-reinforced polyamide 6 / high-density polyethylene blend (PA6 / HDPE) nanocomposite and a preparation method thereof. With the invention, a graphene oxide-reinforced polyamide 6 / high-density polyethylene blend nanocomposite with maximized levels of homogeneity level is introduced. In the invention, the problem of agglomeration, which cannot be prevented in direct melt mixing used in the production of graphene oxide-reinforced polyamide 6 / high-density polyethylene blend (PA6 / HDPE) nanocomposite, was prevented by adding an additional solvent mixing step, thus eliminating the agglomeration problem and increasing the rate of graphene oxide in the nanocomposite material. In the invention, all the problems encountered in incorporating GO (graphene oxide) content into polymer nanocomposites containing polyamide 6 (PA6) and high-density polyethylene (HOPE) are eliminated and a nanocomposite is introduced in which the enhancing properties of GO are effectively transferred to the nanocomposite structure. In addition, the invention eliminates the limitations of the polyamide 6 / high-density polyethylene (PA6 / HDPE) blend nanocomposite, such as unstable phase morphologies and low interface strength.

The application discloses a method for characterizing mesoscopic traps in an interface region of a polymer nanocomposite dielectric, a three-dimensional structure model of the nanocomposite dielectric is constructed by using a Monte Carlo method, an electric field distribution of the nanocomposite dielectric under different conductivity distribution conditions of the interface region is calculated by using a high-throughput simulation to solve a steady-state charge conservation equation, effective conductivity of the nanocomposite dielectric is calculated according to an effective medium theory, and interface region mesoscopic conductivity distribution characteristics of the nanocomposite dielectric are obtained by inversion; the three-dimensional distribution characteristics are helpful to reveal variation rules of trap capturing effects of the interface region on carriers from a microscopic level, and a relationship between a condensed state structure and molecular motion of the interface region of the nanocomposite dielectric and macroscopic electrical properties is established. Theoretical support is provided for improving resistance, breakdown, energy storage and other performances of the nanocomposite dielectric from the perspective of trap regulation, so as to meet development requirements of high energy storage density pulse capacitors and other power equipment.

The present invention relates to a polymer nanocomposite for brain-targeted drug delivery and a pharmaceutical composition comprising same. The polymer nanocomposite of the present invention has a structure in which (a) a cyclodextrin derivative bonded to a piperazine derivative, which is a brain-targeting ligand, and (b) a polymer chain bonded to a hydrophobic compound, which is a guest molecule, are self-assembled through host-guest interaction. The nanocomposite is loaded with a therapeutic drug and can efficiently penetrate the blood-brain barrier and deliver the drug to brain tissue through intranasal administration, which is a non-invasive route.

The invention relates to a metal halide piezoelectric body / P (VDF-TrFE) composite piezoelectric nanofiber, which is characterized in that nanocrystalline is formed in situ in a P (VDF-TrFE) matrix by using a metal halide piezoelectric body, and formation of a P (VDF-TrFE) polar beta phase is induced. A metal halide piezoelectric body and P (VDF-TrFE) are jointly dissolved in an organic solvent, nanofibers are prepared in one step through an electrostatic spinning method, nanocrystals grow in situ in a polymer through the metal halide piezoelectric body, and the P (VDF-TrFE) is jointly promoted to form a polar beta phase under the uniaxial stretching effect of the electrostatic spinning process. The polymer nano composite material has high piezoelectric property and high flexibility, and the preparation method has the advantages of simplicity and rapidness in operation, low energy consumption and the like.