52 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.

The invention discloses a preparation method of a water-oxygen barrier film based on a polymer nano composite material. The preparation method comprises the following steps: step 1, organically modifying Laponite; 2, a CTAC modified Laponite-PMMA precursor solution is prepared, and the CTAC modified Laponite-PMMA precursor solution is prepared; step 3, cleaning the flexible substrate and activating the surface of the flexible substrate; 4, depositing a first layer of inorganic thin film on the flexible substrate subjected to cleaning and surface activation in the step 3, and performing surface activation on the first layer of inorganic thin film; step 5, preparing a modified CTAC-Laponite-PMMA composite film layer on the inorganic thin film layer activated in the step 4 by adopting the CTAC modified Laponite-PMMA precursor solution prepared in the step 2; and step 6, depositing a second layer of inorganic film on the modified CTAC-Laponite-PMMA composite film layer to obtain the inorganic / organic / inorganic overlapped structure water oxygen barrier film. The invention also discloses the water-oxygen barrier film prepared by the method, the bending mechanical stability of the water-oxygen barrier film is obviously improved, and research finds that the film still has good water vapor barrier performance after being repeatedly bent for 6000 times.

The invention provides a close-distance coal seam dynamic coal-pillar-free mining method based on intelligent monitoring, which comprises the following steps: deploying a multi-parameter sensor network in an upper coal seam working surface, a lower coal seam working surface and overlying strata, monitoring the stress, displacement and fracture development state of the overlying strata in real time, and dynamically optimizing roof cutting parameters and a mining sequence in combination with a hydraulic fracturing intelligent regulation and control technology; in the mining process, monitoring data are analyzed through an MATLAB algorithm, an overlying strata caving prediction model is generated, and the overlying strata caving time and range are guided; and meanwhile, the carbon fiber reinforced polymer nano composite material is adopted for reinforcing the roadway side in the lower coal seam gob-retaining roadway, so that the structural stability is improved. Through intelligent monitoring and dynamic regulation and control, accurate control over overlying strata collapse is achieved, the stress concentration risk is reduced, and the resource recovery rate and mining safety are improved.

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.

Aspects of the invention include a nanoadditive comprising a synthetic melanin-inspired nanoparticle, wherein: the synthetic melanin-inspired nanoparticle comprises a plurality of covalently-linked artificial melanin precursors, and each artificial melanin precursor independently comprises an artificial allomelanin precursor, an artificial eumelanin precursor, or a structural isomer thereof. Aspects of the invention include methods of generating polymer nanocomposites and methods of enhancing a mechanical property of a polymeric material.

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.

The application relates to a polymer nanocomposite material and a preparation method and application thereof, relates to the material field, and the preparation method comprises the following steps: processing polyvinyl acetate grafted modified nanocellulose wet powder into a shape through a thermoplastic processing device to obtain the polymer nanocomposite material, wherein the water content of the polyvinyl acetate grafted modified nanocellulose wet powder is 8-30 wt%, and the thermoplastic processing temperature is 40-90 DEG C. The polyvinyl acetate grafted modified nanocellulose wet powder can be processed through thermoplastic processing under the condition of containing water at 40-90 DEG C, the processing temperature is not required to be 160 DEG C, the processing temperature is reduced from 160 DEG C to below 90 DEG C, the wet powder can be reprocessed through water absorption, and the processing frequency has a smaller influence on the mechanical properties of the polymer. In addition, compared with pure polyvinyl acetate, the nanocomposite material prepared by the application is more easily biodegradable, and can be completely biodegraded after being buried in the soil for 180 days.

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.

[Problem] To provide a system capable of inputting an optimum amount of energy in a kneading process regardless of whether nanoparticles included in a polymer are organically modified. [Solution] This production method comprises: a charging step for charging nanoparticles into a polymer; and a kneading step for melt-kneading the nanoparticles into the polymer by inputting sufficient energy to form the dispersion state of the nanoparticles. In the charging step, the combination of the nanoparticles and the polymer is selected so that WPF / WFF > 0.9 is satisfied, and in the kneading step, the amount of energy to be input is determined so that σh / σc > 0.5. Here, WPF denotes adhesion work between the nanoparticle and the polymer, WFF denotes an aggregation work between the nanoparticles, σh denotes a shear stress, and σc denotes a crushing strength calculated by a Rumpf formula represented by the following formula (1). (In the formula, d represents a primary particle diameter, ε represents the porosity of an aggregate, and F represents an interparticle force.)

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 invention relates to a graphite lubricated bearing for ships and a preparation method thereof. The method comprises the following steps: pretreatment: adding a polymer precursor and a catalyst into a reactor, and after reaction, obtaining an ultra-high molecular thermosetting resin solution; modification: adding a solid lubricant and an alkali into the ultra-high molecular thermosetting resin solution, and after stirring, obtaining a modified ultra-high molecular thermosetting resin solution; gluing: impregnating the ultra-high molecular thermosetting resin solution onto a frame material to obtain a semi-cured polymer nanocomposite sheet; pressing: placing the semi-cured polymer nanocomposite sheet onto a press and pressing to obtain a graphite lubricated bearing for ships. Compared with the prior art, the present invention has the advantages of having stronger mechanical properties and dimensional stability, while ensuring a lower friction coefficient and volume wear under extreme working conditions.

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 invention discloses a preparation method and application of a one-dimensional zinc ion battery anode interface layer material based on a regenerated cellulose base, and belongs to the field of polymer nano composite materials. The preparation method of the anode interface layer material of the zinc ion battery comprises the following steps: mixing 1-butyl-3-methylimidazolium chloride with cotton pulp to obtain a precursor solution containing regenerated cellulose; and uniformly coating the surfaces of different zinc wires with the obtained precursor solution, washing the zinc wires with distilled water to wash away the ionic liquid in the zinc wires, and forming a regenerated cellulose shell layer on the surfaces of the zinc wires to obtain the zinc ion battery anode material. The regenerated cellulose is prepared by taking the cotton pulp and the ionic liquid as raw materials, and the corresponding preparation scheme is optimized, so that the product can be endowed with a unique nano structure. Through molecular chain rearrangement and composite functional design, the regenerated cellulose interface layer realizes collaborative optimization of an amorphous-porous composite structure and high mechanical flexibility. The zinc wire battery has high mechanical strength, chemical stability and a functional surface, provides an efficient ion transmission path and dendritic crystal inhibition capability for the zinc wire battery, and remarkably improves the performance and the service life of the battery.

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.

[Problem] To provide a system capable of inputting an optimum amount of energy in a kneading process regardless of whether nanoparticles included in a polymer are organically modified. [Solution] This production method comprises: a charging step for charging nanoparticles into a polymer; and a kneading step for melt-kneading the nanoparticles into the polymer by inputting sufficient energy to form the dispersion state of the nanoparticles. In the charging step, the combination of the nanoparticles and the polymer is selected so that WPF / WFF > 0.9 is satisfied, and in the kneading step, the amount of energy to be input is determined so that σh / σc > 0.5. Here, WPF denotes adhesion work between the nanoparticle and the polymer, WFF denotes an aggregation work between the nanoparticles, σh denotes a shear stress, and σc denotes a crushing strength calculated by a Rumpf formula represented by the following formula (1). (In the formula, d represents a primary particle diameter, ε represents the porosity of an aggregate, and F represents an interparticle force.)

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).

Aspects of the present disclosure include compositions of and methods for producing a polymer-polysaccharide nanocomposite resin, including preparing a dispersion comprising polysaccharide nanocrystals, an alkane diol monomer and an alkane diacid agent monomer; polycondensing the alkane diol monomer and the alkane diacid agent monomer in the dispersion 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.