102 results about "Polymer thin films" patented technology

The present invention relates to a polymer composition comprising an ethylene-based polymer and a polylactic acid. Such polymer composition exhibits desirably good melt fracture prevention properties, in particular in production of polymer films.

Embodiments of this disclosure relate to a method for selectively depositing polysilicon after forming a fluid polymer film to protect a substrate surface within a feature. A first silicon (Si) layer is deposited by physical vapor deposition (PVD). A fluid polymer film is formed on the first silicon (Si) layer on the bottom. A portion of the first silicon (Si) layer is selectively removed from the top surface and at least one side wall. The fluid polymer film is removed. In some embodiments, a second silicon (Si) layer is selectively deposited on the first silicon (Si) layer to fill the feature. In some embodiments, the remaining portion of the first silicon (Si) layer on the bottom is oxidized to form a first silicon oxide (SiO₂) on the bottom. x ) forms a layer, and a silicon (Si) layer or a second silicon oxide (SiO) layer x The ) layer is the first silicon oxide (SiO x It is deposited on top of layers.

An optically anisotropic polymer thin film includes a crystallizable polymer and an additive configured to interact with the polymer (e.g., via π-π interactions) to facilitate chain alignment and, in some examples, create a higher crystalline content within the polymer thin film. The polymer thin film may be characterized by a bimodal molecular weight distribution where the molecular weight of the additive may be less than approximately 50% of the molecular weight of the crystallizable polymer. Example crystallizable polymers include polyethylene naphthalate, polyethylene terephthalate, polybutylene naphthalate, polybutylene terephthalate, as well as derivatives thereof. Example additives, which may occupy up to approximately 10 wt. % of the polymer thin film, include aromatic ester oligomers, aromatic amide oligomers, and polycyclic aromatic hydrocarbons, for example. The optically anisotropic polymer thin film may be characterized by a refractive index greater than approximately 1.7 and an in-plane birefringence greater than approximately 0.2.

The application provides a method for modifying a composite aluminum foil by oxygen plasma, the composite aluminum foil, and an electrode tab and an electrochemical device comprising the same, and relates to the technical field of lithium ion batteries. The modification method comprises the following steps: providing a composite aluminum foil with a polymer film and at least one aluminum layer; placing the composite aluminum foil in a vacuum treatment system, and introducing an oxygen-containing gas; starting an ion source to generate oxygen plasma, and performing oxidation treatment on the aluminum layer to generate aluminum oxide in situ on the surface and internal defects of the aluminum layer. The method triggers controllable oxidation on the intrinsic surface and internal defects of the aluminum layer, simultaneously improves the compactness and corrosion resistance of the aluminum layer, improves the surface energy of the aluminum layer, and enhances the interfacial bonding force with a subsequent functional coating layer. In addition, the method realizes in-situ repair and functional modification of the aluminum layer structure without significantly affecting the conductivity, and is suitable for roll-to-roll continuous production.

Fire protection layer (1) comprising a multilayer structure: a first stack (50) comprising alternating polymer film layers (10) and glass fiber-comprising layers (20); and a second stack (50) comprising alternating polymer film layers (10) and glass fiber-comprising layers (20); and a steel foil (15), wherein the polymer film layers (10) are metallically coated on both sides.

This invention discloses a droplet microarray chip based on molecular logic operations and its construction method, belonging to the field of biochemical analysis and detection technology. It includes a substrate layer, a functional layer on the substrate layer, and molecular logic circuitry. The functional layer is a superhydrophilic-superhydrophobic patterned porous polymer film prepared in situ on the substrate using digital light processing technology, followed by PFOC acylation. The superhydrophilic-superhydrophobic patterned porous polymer film contains arrayed superhydrophilic microreaction units, separated by superhydrophobic polymer regions. Each superhydrophilic microreaction unit encapsulates an independent microdroplet, and the molecular logic circuitry is encapsulated within each independent microdroplet. This invention, through the combination of droplet microarray chip and molecular logic circuitry, achieves systematic improvements in multi-enzyme synergistic detection capabilities, logic computation complexity, spatial isolation control, high-throughput analysis, and adaptation to biological environments.

The application discloses a preparation method of a high-stability cellulose nanofluid film, and a product and application thereof, and belongs to the field of energy conversion and material science. The method comprises the following steps: adding modified cellulose into an ionic liquid to prepare a solution by heating; dropping and coating the solution onto the surface of a porous polymer film, and preparing a gel film by heating and vacuum treatment; and obtaining the nanofluid film after water soaking and drying of the gel film. The nanofluid film adopts an embedded structure, the cellulose layer is a small-pore structure, the porous polymer film is a large-pore structure, and the nanofluid film has etching and three-dimensional network channel structures. The preparation process is simple and the conditions are mild, the prepared film has excellent ion rapid selective transmission performance, acid-base stability and long-term operation stability, can efficiently convert salinity gradient energy into electric energy, and has a good application prospect in the field of salt-difference osmotic energy utilization.

To provide a small, easy-to-operate electrochemiluminescence sensor. [Solution] An electrochemiluminescence sensor for detecting a test substance in a sample using nanoparticles with an electrochemiluminescence immunoassay method utilizing a plasmon-enhanced field, comprising: a first substrate; an electrode provided on the surface of the first substrate, wherein a first specific binding substance that specifically binds to the test substance is bound to the surface of the electrode; the nanoparticles comprising: metal nanoparticles; a polymer film covering the surface of the metal nanoparticles; a second specific binding substance bound to at least one of the polymer film and the metal nanoparticles and specifically binding to the test substance; and an electrochemiluminescent substance bound to at least one of the polymer film and the second specific binding substance and capable of contacting a co-reactant, wherein the electrochemiluminescence sensor comprises: a first substrate; an electrode provided on the surface of the first substrate, wherein a first specific binding substance that specifically binds to the test substance is bound to the surface of the electrode; and an electrochemiluminescent substance that is bound to at least one of the polymer film and the second specific binding substance and capable of contacting a co-reactant.

This invention discloses a physical sealing mechanism for a multilayer polymer-encapsulated liquid metal power supply channel, aiming to solve the reliability problem of flexible electronic devices in complex environments. The mechanism includes: firmly bonding a substrate polymer film to a textile substrate via a thermo-pressing process; forming a conductive layer by spraying liquid metal using a template; achieving multilayer stacking of an intermediate polymer film with through-holes and the conductive layer using solvent-based soft soldering technology; and finally, completely encapsulating the entire circuit by casting or coating a polymer layer. The core of this invention lies in the synergistic use of multiple physical bonding mechanisms to achieve strong interlayer adhesion, effectively preventing leakage or electrical failure of the liquid metal under extreme stretching and underwater environments. This mechanism provides a reliable solution for constructing highly robust, underwater-operable multilayer flexible electronic devices.

A method for manufacturing an inkjet head chip includes: 1) providing an inkjet head wafer, wherein a first surface of the inkjet head wafer has at least one polymer thick film; 2) providing a polymer thin film, wherein a second surface of the polymer thin film is coated with an adhesion promoter; 3) rolling the polymer thin film onto the polymer thick film of the inkjet head wafer in a wafer-to-wafer manner; 4) spin-coating a siloxane photoresist onto a third surface of the polymer thin film, and performing photomask alignment on the inkjet head wafer by examining the siloxane photoresist and the polymer thin film; 5) exposing and developing the siloxane photoresist; and 6) etching the polymer thin film to form a plurality of nozzle plates and at least one protective rib.

This invention discloses a method for improving the toughness of annealed conjugated polymer films. The method includes: mixing a nucleating agent with a conjugated polymer, forming a film, and then annealing it to obtain a modified conjugated polymer film. This invention accelerates the crystallization of the conjugated polymer by adding a nucleating agent, effectively increasing the number of connecting molecules between crystalline regions within the film. The annealed film exhibits higher electrical conductivity and better toughness, even approaching the tensile properties of unmodified conjugated polymer films, thus solving the problem of good electrical properties but poor toughness in annealed conjugated polymer films.

The present invention discloses an ionic polymer-based ion adsorption type self-driven tensile sensor. An ionic polymer-based ion adsorption type self-driven tensile sensor according to one embodiment of the present invention comprises an ionic polymer composite material containing ions internally, and a first electrode and a second electrode having different work functions attached to the ionic polymer composite material, thereby forming a base potential through the difference in the amount of ions physically adsorbed to each electrode surface, and including a mechanism in which the ion concentration in the tensile direction within the ionic polymer thin film decreases in response to an external tensile stimulus, so as to detect the degree of change in the potential difference between the two electrode ends based on the change in the amount of ions adsorbed to the surfaces of the first and second electrodes, thereby providing a self-driven tensile sensor that measures the degree of tensile without an external power source.

This invention discloses a method for preparing a single-component room-temperature phosphorescent / fluorescent dual-emission polymer film, comprising: reacting a terminal amino-substituted alkane with halogen-modified naphthalenecarboxylic anhydride to synthesize an organic light-emitting small molecule with phosphorescent / fluorescent dual-emission function; and mixing the obtained organic light-emitting small molecule into a dynamically cross-linked supramolecular polymer to obtain a single-component room-temperature phosphorescent / fluorescent dual-emission polymer film. This invention also discloses the single-component room-temperature phosphorescent / fluorescent dual-emission polymer film prepared by the above method and its applications. The preparation method of this invention is simple and low-cost. The polymer film prepared with only a single component can generate a phosphorescent / fluorescent dual-emission ratio light signal with stable emission. The film color changes with changes in ambient humidity, and the film can sense ambient humidity in the range of 1–100%, showing broad application prospects in sensing, anti-counterfeiting, and bioimaging fields.

This invention discloses an underwater transparent flexible actuation device, belonging to the field of underwater soft robot technology. The device includes a flexible support frame, a composite actuation film, and conductive connectors. The flexible support frame is a monolithic polymer film with multiple cantilevered support ribs evenly distributed outwards from the center. The composite actuation film is attached and fixed to the flexible support frame and includes two equiaxed pre-stretched dielectric elastomer film layers and a flexible conductive layer sandwiched between them. The two dielectric elastomer film layers self-encapsulate the flexible conductive layer, which is connected to an external power source via conductive connectors. Both the flexible support frame and the composite actuation film are made of transparent materials. By controlling the on / off state of the flexible conductive layer, the flexible support frame is driven to expand and contract to generate buoyancy thrust. This invention solves the problems of complex encapsulation and opacity inherent in traditional DE actuator technology.

In one aspect, the disclosure relates to multilayer composite films comprising a first biopolymer such as agarose, and a second biopolymer such as shellac. In the films, one or both layers may further comprise a biodegradable plasticizer. In a further aspect, the films can be flat or can be thermoformed to have a three-dimensional shape. The films are biodegradable and have very low permeability to water, gases, and other contaminants. Also disclosed are methods of making the films and consumer product packaging materials comprising the films.

The objective is to provide a fluorine-containing polymer film. This objective can be achieved by a fluorine-containing polymer film having a thermal shrinkage rate of 0.4% or less after heating at 90°C for 1 hour and a dielectric constant of 3 to 50 at 25°C and 1000 Hz, or by a fluorine-containing polymer film having a degree of crystallinity of 50% or more and an elongation at break of 400% or more.

This invention discloses a bismaleimide-modified polyaryletherketone (PAK) composition, its preparation method, and its applications, belonging to the technical field of polymer materials and high-temperature insulating coatings. The composition comprises a PAK polymer, a bismaleimide crosslinking agent, and a free radical catalyst. The PAK polymer backbone or side chains contain cyano functional groups that participate in the crosslinking reaction, and the bismaleimide crosslinking agent contains active maleimide functional groups, which react with the cyano groups of the PAK polymer backbone to form a slightly crosslinked network structure. The novel slightly crosslinked network polymer film prepared by this invention exhibits strong solvent resistance, excellent material processing properties, and superior insulation properties at high temperatures.

A method and a system for producing a porous polymer film may be provided. The degree of oxygen removal within the pores of the preliminary porous film may be controlled using any one of a vacuum index IV defined by Equation 1, an impregnation index IL defined by Equation 2, and a suction index IS defined by Equation 3. Accordingly, side reactions caused by oxygen during electron beam crosslinking may be suppressed or reduced, thereby improving the chemical and mechanical properties of the porous polymer film produced thereby.

The application relates to a preparation method of a high-frequency dynamic response flexible thin film array sensor based on alveolar biomimetic structure, and belongs to the technical field of pressure sensors. First, a flexible polymer thin film is spin-coated on a glass sheet and solidified, a metal thin film is deposited on the surface of the flexible polymer thin film, a photoresist is spin-coated on the surface of the metal thin film, and the photoresist and the metal thin film are patterned; second, photoresist type polyimide is spin-coated on the surface of the patterned metal thin film, and the photoresist type polyimide is patterned to expose only the interdigital unit area and the pad area; third, a pressure sensitive layer microstructure prepared from a nano-composite material is integrally bonded with the interdigital area of the encapsulated photoresist type polyimide sheet; and finally, high-temperature-resistant silicone rubber is spin-coated on the surface of the pressure sensitive layer to obtain a flexible piezoresistive sensor. The application has high-frequency response characteristics and high sensitivity, can be seamlessly attached to the inner wall of a complex curvature casing, can realize in-situ high-fidelity capture of the space-time distribution of wind pressure in a high-temperature and limited space environment, and provides a data cornerstone for intelligent perception and active flow control of a turbine engine.

This invention belongs to the field of laser processing, specifically relating to a method for preparing concentric ring micropores using a femtosecond Bessel beam for polymer thin films. The method includes: guiding a Bessel beam, consisting of a central core and multiple concentric rings surrounding it, onto the surface of a polymer thin film deposited on a transparent substrate; adjusting the single-pulse energy to selectively activate the central core of the Bessel beam, or a combination including the central core and one or more peripheral concentric rings, such that the energy density of the activated region exceeds the ablation threshold of the polymer thin film, thereby forming a micropore in the polymer thin film under the action of a single pulse; wherein the pore size of the micropore is determined by the activated central core or the combination thereof, and the micropore is a low aspect ratio hole with a depth substantially equal to the thickness of the polymer thin film, without damaging the transparent substrate. By controlling the activation of the concentric rings of the Bessel beam, the pore size and shape characteristics can be regulated.

This application relates to a polyimide film, its preparation method, and its application, falling within the field of polymer film preparation technology. The preparation method includes: dissolving calix[n]aromatics, monoacyl chloride monomers, and diacyl chloride monomers in an organic solvent at a specific molar ratio to form a hyperbranched structure; adding a diamine monomer to generate an amino-terminated hyperbranched structure; then adding a dianhydride monomer and a diacyl chloride monomer to obtain a polyamic acid solution; and finally, chemical imidization and film-forming treatment to obtain a polyimide film. This application effectively solves the problem that existing polyimide films struggle to simultaneously possess excellent bending resistance and creep resistance, significantly improving the film's applicability in the field of flexible displays.

The present invention provides nanoparticles that can increase the intensity of electrochemiluminescence. [Solution] A nanoparticle body comprising metal nanoparticles, a polymer film coating the surface of the metal nanoparticles, a specific binding substance bonded to at least one of the metal nanoparticles and the polymer film and specifically binding to the test substance in the sample, and an electrochemiluminescent substance bonded to at least one of the polymer film and the specific binding substance.

A method for manufacturing a porous polymer film according to embodiments of the present disclosure may comprise a polymer sheet containing oil to prepare a preliminary porous polymer film; irradiating the preliminary porous polymer film with electron beams to produce a crosslinked porous polymer film; extracting oil from the crosslinked porous polymer film; and heat setting the crosslinked porous polymer film. In addition, a system for manufacturing a porous polymer film and a porous polymer film having crosslinking are disclosed.

Processes are provided herein for deposition of organic films. Organic films can be deposited, including selective deposition on one surface of a substrate relative to a second surface of the substrate. For example, polymer films may be selectively deposited on a first metallic surface relative to a second dielectric surface. Selectivity, as measured by relative thicknesses on the different layers, of above about 50% or even about 90% is achieved. The selectively deposited organic film may be subjected to an etch process to render the process completely selective. Processes are also provided for particular organic film materials, independent of selectivity. Masking applications employing selective organic films are provided. Post-deposition modification of the organic films, such as metallic infiltration and / or carbon removal, is also disclosed.

Disclosed are an electrically conductive gasket and an electromagnetic wave shielding device applying same, the gasket being easily pressed with a small force due to the restoring force of a bending portion of a polymer film and achieving reliable electrical contact with an object. The electrically conductive gasket comprises a polymer film having an adhesive layer formed on the inner surface thereof and a metal layer formed on the outer surface thereof, wherein the polymer film is bent to surround the adhesive layer on at least one side so as to form a bending portion, the adhesive layer is not adhered to itself at least a part of the bending portion such that an inner space surrounded by the polymer film is formed, the adhesive layer is adhered to itself at a part, excluding the bending portion, where the polymer film overlaps such that a support layer is formed, and a support part is formed by the support layer and the part where the polymer film overlaps.

A porous membrane is provided comprising layers (A), (B), and (C) in an ACB orientation, wherein layer (A) comprises an amorphous fluoropolymer, layer (B) comprises a symmetric fluoropolymer membrane or an asymmetric fluoropolymer membrane, and layer (C) comprises a composite fluoropolymer comprising (i) an amorphous fluoropolymer and (ii) a symmetric fluoropolymer membrane or an asymmetric fluoropolymer membrane. A method for producing and using the porous membrane is also provided.

The utility model provides a kind of flexible ultrasonic transceiver, including body and control box assembled on body;Control box bottom has via hole and body inside intercommunication, surface assembly has control button and pilot lamp;Body appearance is flat, outer layer is made of packaging material with good flexibility and biocompatibility, inside encapsulated ultrasonic transducer array layer and electrode lead-out layer;Ultrasonic transducer array layer is a kind of flexible film type ultrasonic transducer array based on polymer film;Electrode lead-out layer is a piece of flexible printed circuit FPC, there are lead end and outgoing terminal pad on it, and the wiring of connecting both. The flexible ultrasonic transceiver proposed by the utility model has the advantages of flexible bendable, light and thin portable, simple production process, etc., and has broad application prospect in nondestructive testing, wearable device, biomedical and other fields.

This invention discloses a ZIF-90-loaded polyacrylonitrile membrane with switchable superwetting properties, its preparation method, and its applications. This oil-water separation membrane is prepared by introducing a hydrophilic polymer into a polyacrylonitrile substrate via free radical polymerization. After solvent-inducing phase separation, the polymer membrane is modified with ZIF-90 particles to construct a micro / nano rough surface structure. The preparation method described in this invention uses readily available raw materials and is highly operable. The prepared polymer film exhibits switchable wettability, demonstrating superamphilic properties in air, superoleophobic properties underwater, and superhydrophobic properties underwater. It exhibits excellent separation capabilities for various immiscible oil-water mixtures and stable oil-water emulsions. It has broad application value in industrial waste oil recovery, sewage treatment, and marine oil spill recovery.