36 results about "Polymer encapsulation" patented technology

Metal-coated polymer-encapsulated power semiconductor modules, methods of making / using such power modules, and vehicles having traction power inverters containing such power modules are provided. A power electronics assembly includes one or more power semiconductor modules enclosed within an assembly housing. Each power module includes a substrate, a semiconductor device mounted on the substrate, a polymer encapsulant in which the substrate and semiconductor device are encapsulated, and electrical leads connected to the semiconductor device and protruding from the polymer encapsulant. A metal or ceramic coating is applied to selected portions of the exposed outer surface of the polymer encapsulant. The metal / ceramic coating can be a single metal layer covering substantially all of the exposed surface area of the outer surface of the polymer encapsulant. An optional hydrophobic polymer layer, a passivation layer, and / or an oxide layer can cover the outer surface of the metal layer. Alternatively, another metal layer or an embedded layered microstructure can cover the metal layer.

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.

The present invention discloses a drug-loaded nanoparticle and its preparation method and application. The drug-loaded nanoparticle comprises: a hydrophobic anti-tumor drug, an amphiphilic polymer and a tannic acid-manganese complex; the hydrophobic anti-tumor drug is coated in the amphiphilic polymer; the tannic acid-manganese complex is loaded on the surface of the amphiphilic polymer; wherein the amphiphilic polymer comprises a hydrophilic segment and a hydrophobic segment, the hydrophilic segment is selected from polyethylene glycol; the hydrophobic segment is selected from poly(lactic acid-co-glycolic acid) copolymer. The present invention uses the amphiphilic polymer to encapsulate the hydrophobic anti-tumor drug, and uses tannic acid polyphenol to chelate metal manganese on its surface to form a metal-phenol network covering it, ultimately obtaining drug-loaded nanoparticles; achieving in situ killing of tumor cells and release of TAAs. Thus, a long-term and efficient immune response is achieved. At the same time, the material also has an imaging effect, which facilitates real-time monitoring of tumor tissue during treatment.

The invention discloses near-infrared thermal molecules, nano particles, injectable near-infrared thermal hydrogel and application of the injectable near-infrared thermal hydrogel in preparation of anti-obesity drugs. The structural formula of the near-infrared photothermal molecule is shown in the specification. According to the invention, molecular structure design is carried out to obtain near-infrared thermal molecules with strong near-infrared absorption, bright near-infrared two-region fluorescence emission and high photo-thermal stability; near-infrared photothermal molecules are packaged into spherical nanoparticles by using an amphiphilic polymer through a nanoprecipitation method, the spherical nanoparticles are further mixed with a temperature-sensitive matrix material to prepare the near-infrared photothermal hydrogel capable of being subcutaneously injected, after near-infrared irradiation, adipocyte apoptosis can be remarkably induced, meanwhile, white fat is promoted to be converted into beige fat, and the effect of preparing the near-infrared photothermal hydrogel is achieved. The efficient anti-obesity effect is achieved; and hydrogel degradation, medicament distribution and treatment processes can be tracked in real time through near-infrared two-region fluorescence imaging, so that the controllability and accuracy of treatment are improved. The whole system shows good biocompatibility, and has outstanding application potential in the anti-obesity field.

The invention discloses a battery fiber of an ultraviolet curing electrolyte as well as a preparation method and application of the battery fiber. The battery fiber comprises an electrode fiber core, a gel electrolyte layer and a polymer encapsulation layer from inside to outside. The electrode fiber core is formed by twisting and compounding a positive electrode fiber and a negative electrode fiber; the gel electrolyte layer is formed by curing a precursor containing a photocuring monomer, a photoinitiator, a linear polymer and a lithium salt through ultraviolet irradiation. According to the preparation method, a stable gel electrolyte layer is rapidly constructed on the surface of the fiber at normal temperature through an ultraviolet curing technology, so that the potential safety hazard that a traditional liquid electrolyte is easy to leak is solved, an electrode-electrolyte interface is also remarkably optimized, and the interface impedance is reduced. The obtained battery fiber has excellent flexibility, high safety and good electrochemical performance, the slender one-dimensional form of the battery fiber can be directly woven into an intelligent fabric through a textile technology, and an ideal flexible embedded power supply solution is provided for wearable electronic equipment.

The invention provides multi-coated ceramide nanoparticles as well as a preparation method and application thereof, and relates to the technical field of medicines and cosmetics. The multi-coated ceramide nanoparticle provided by the invention comprises a ceramide liposome and a polymer layer for coating the ceramide liposome, the ceramide liposome comprises ceramide and a liposome for coating the ceramide, and the liposome is a lipid bilayer formed by phospholipid and cholesterol. The ceramide is subjected to multiple wrapping, the ceramide can be protected from being damaged by the external environment through wrapping of the lipidosome, and the skin permeability of the ceramide is improved to a certain degree; polymer wrapping provides an additional protection layer, and the stability is enhanced. According to the multi-coated ceramide provided by the invention, the stability, the permeability and the effect of the ceramide are remarkably improved by combining the liposome, the nanoparticles and the microcapsule, so that the ceramide can permeate into a corium layer or a deeper part to play a role.

The invention discloses a proton exchange membrane based on vertically arranged polydopamine intercalated montmorillonite nanosheets and a preparation method thereof. The invention comprises the following steps: mixing a heat-treated MMT sample with ultrapure water, stirring at high speed until the heat-treated MMT sample is fully rehydrated, and ultrasonically treating the mixture to obtain an MMT nanosheet dispersion having uniform diameters; adding DA powder and fully stirring the mixture to obtain a DA and MMT dispersion system; adjusting the pH value and fully stirring the mixture to obtain a dark brown PDA-MMT nanosheet dispersion; vacuum filtering the dark brown PDA-MMT nanosheet dispersion, rinsing the mixture with additional ultrapure water, and naturally drying the mixture to obtain a PDA-MMT film; screening to obtain an xDA-MMT film having stable water phase; characterizing the xDA-MMT film having stable water phase and testing its surface proton conductivity, screening the xDA-MMT film having the best proton conductivity under water-stable conditions, and preparing a VAPMM proton exchange membrane having uniform thickness by polymer encapsulation and precise cutting in a direction perpendicular to the nanosheets. The VAPMM film prepared by the present invention has lower cost than a commercial Nafion film, is environmentally friendly, and has good water phase stability.

The invention discloses a polymer encapsulation system-based tamponade type flexible optical waveguide integrated optical genetic probe, the appearance of an implantation part of the probe is of a flat tamponade structure, and the probe comprises a cuboid trunk and a crown which is positioned at the tail end of the trunk and is formed by nesting and stacking at least two layers of prisms with tips; the internal structure of the optical genetic probe comprises a polymer cladding and a waveguide core layer; the waveguide core layer is located inside the polymer cladding or above the polymer cladding; the refractive index of the waveguide core layer is greater than that of the polymer cladding layer. The tower-loose structure of the probe can disperse the tip stress of the probe during implantation, protect the functional units distributed at the extension part of a tree crown, and prevent the layering of the probe structure from causing the peeling, damage and failure of the functional units; after implantation, tooth-shaped anchoring is formed between the extending part of the tree crown and the brain tissue, stronger interaction is generated, probe displacement caused by micro-motion in the brain tissue is effectively resisted, and the stability of long-term signal acquisition sites is ensured.

The invention provides an artificial lightweight aggregate with high heat capacity, high strength, low water absorption and surface reactivity. The aggregate comprises an inner core which is selected from shale lightweight aggregate of which the normal-pressure water absorption rate is not lower than 20% and the particle size is 1-2mm; the phase change material is adsorbed in the holes of the inner core through the capillary action of the holes in the surface of the inner core; the polymer encapsulation layer is used for adsorbing the surface of the inner core with the phase change material to form a flexible thin film to prevent leakage of the phase change material and is used as a buffer layer when the volume of the phase change material is changed due to phase change or temperature change; the transition layer is coated on the polymer encapsulation layer, so that the peripheral alkalinity is reduced, and the polymer encapsulation layer is prevented from being eroded by alkali; the transition layer is coated with the shell, the strength of the artificial lightweight aggregate is improved, the water absorption rate is reduced, and therefore the working performance and strength of concrete or mortar are improved. The artificial lightweight aggregate has the heat capacity of 1100-1200 J / (kg.K), the cylinder compressive strength of 6.0-7.0 MPa, the water absorption rate of less than 7% and the loose bulk density of less than 900 kg / m < 3 >.

The invention discloses a heterogeneous connection method between a flexible sensor and a rear-end signal processing circuit, which relates to the technical field of sensors, and comprises the following steps: firstly, reserving copper bonding pads for mechanical connection and circuit connection on the rear-end signal processing circuit, and selecting foamy copper matched with the copper bonding pads in number for mechanical connection and circuit connection respectively; each piece of foamy copper used for mechanical connection and circuit connection comprises a first foamy copper area and a second foamy copper area, and the first foamy copper areas used for two kinds of connection are welded to the positions of mechanical connection and circuit connection copper bonding pads through solder paste; secondly, a rear-end signal processing circuit in the second foamy copper area is in circuit connection with a sensing unit; and finally, mechanically connecting the rear-end signal processing circuit in the second foamy copper area with the sensing unit. According to the method provided by the invention, the foamy copper is used as a connecting medium, and the elastomer polymer is combined for packaging, so that the problems of mechanical connection and circuit communication between the flexible sensor and a rear-end signal processing circuit are solved.

The present invention relates to a polymer-encased electronic component (10), wherein the electronic component (20) has a metal surface (30) at least in places, wherein the polymer-encased electronic component (10) has a polymer matrix (40), wherein the metal surface (30) of the electronic component (20) is connected to an adhesion promoter (50) and wherein the adhesion promoter (50) comprises a compound of formula M1 2[M2F6] where M1 = H, NH4, Li, Na, K, Rb, Cs and M2 = Ti, Zr, characterised in that a phenoplast (60) is arranged between the adhesion promoter (50) and the polymer matrix (40).

The invention relates to a solid-solid phase change aggregate for heat storage and a preparation method thereof, and belongs to the technical field of phase change aggregates. According to the aggregate, a hollow ceramic ball with a porous shell layer serves as a supporting body of a solid-solid phase change material, the solid-solid phase change material is molten and then adsorbed into the hollow ball, and then the exterior of the hollow ball is packaged through a polymer, so that the waterproofness and stability of the material are guaranteed. The phase change temperature of the solid-solid phase change material in the aggregate is relatively low, the state of the phase change material in the solid-solid phase change stage is not changed, and the phase change material is always kept in a solid state, so that the problem that the solid-liquid phase change material is easy to leak is avoided. A solid-solid phase change material is used for replacing a solid-liquid phase change material to prepare the phase change aggregate, and polymer packaging is performed according to the characteristics of the solid-solid phase change material, so that the phase change aggregate has good waterproofness and stability. The preparation method is simple, easy to popularize and low in cost. Compared with traditional phase-change aggregate, the phase-change aggregate is more suitable for building energy conservation in phase-change concrete.

This invention discloses a cellulose-based piezoelectric composite material, a piezoelectric device, and its preparation method, belonging to the technical field of piezoelectric materials and flexible electronic devices. Addressing the problems of low stress transfer efficiency and limited output performance in traditional piezoelectric devices due to low substrate flexibility, uneven dispersion of piezoelectric fillers, and weak interfacial bonding, this invention first involves microwave treatment and chemical pretreatment of biomass raw materials to remove lignin and hemicellulose while retaining their three-dimensional porous structure, resulting in a cellulose framework. The framework is then functionalized through methods such as impregnation with metal ion solutions, vacuum impregnation with a two-dimensional material dispersion after surface modification, or further in-situ synthesis of metal oxides via hydrothermal reaction. Finally, it is impregnated with PVDF or PDMS solutions and compressed and cured to form an elastic composite material. This method utilizes a biomass template to achieve uniform loading and ordered composite of functional components, and polymer encapsulation enhances interfacial stability. It is primarily used for micro-energy harvesting and self-powered sensing in flexible wearable devices.

The invention relates to an illuminable glazing unit (100) for a vehicle, comprising an outer glass pane (1), an inner pane (2), a laminated interlayer (3) and a peripheral masking layer (4). The outer edge face is indented from the first edge face on at least one first edge, called offset outer edge, by r1. It comprises a peripheral seal (8) which is an opaque polymer encapsulation of the edge face of the glazing, framing the laminated glazing, and a peripheral opaque element extending the encapsulation and / or connected to the laminated interlayer in the area of the offset outer edge, between the outer edge face and the first edge face.

The present invention is an innovative technology that utilizes natural raw materials such as germinated black rice, black beans, aronia, and blueberries to extract anthocyanins, which are functional physiologically active substances, with higher efficiency and superior quality compared to existing methods. Specifically, it is a method that maximizes the extraction efficiency of anthocyanin components by maximizing the contact frequency and surface area between the raw material and the extraction solvent through fluid bed technology or a stirring system under low-temperature conditions (approximately 25℃). The core technology of the present invention lies in maximizing the anthocyanin content by optimizing the management conditions of the raw material during the germination process, and precisely controlling low-temperature erosion to minimize thermal damage or loss of activity of anthocyanin components caused by high temperatures during the extraction process. Furthermore, the present invention efficiently extracts anthocyanins of high purity and yield by applying process devices such as a fluidized bed or a stirring system to significantly increase the contact frequency and contact surface area between the raw material and the solvent. In particular, the present invention aims to significantly improve long-term storage stability and bioavailability by applying additional filtration and nanoparticle-based stabilization technology after extraction at low temperature to increase the uniformity of microparticles in the extract, and by effectively protecting anthocyanin components from external environmental factors through liposomes, solid lipid nanoparticles (SLN), or polymer encapsulation technology. In addition, the main purpose of the method of the present invention is to minimize the degradation and alteration of anthocyanin components to enhance their quality and economic value as functional materials, thereby increasing their usability so that they can be widely applied in various industrial fields such as food, cosmetics, and pharmaceuticals.

The invention provides a battery packaging material which is prepared from the following raw materials in parts by mass: 5-40 parts of a monomer, 5-40 parts of an initiator, 0.01-5 parts of a flame retardant, 0.1-10 parts of a polymer material and 50-100 parts of a solvent. A monomer material, an initiator, a flame retardant, a polymer material and a solvent are uniformly mixed to form a precursor slurry solution, a naked cell is placed in the precursor slurry solution, and the precursor slurry solution is subjected to in-situ polymerization on the surface of the naked cell to generate a layer of polymer packaging material with a certain thickness. The polymer packaging material can be tightly combined with the surface of the naked battery cell, the energy density of the battery is improved, and the naked battery cell can keep the position unchanged and cannot be staggered from the packaging material under the external force conditions of collision, extrusion and the like. In addition, the invention also provides a preparation method of the battery packaging material.

The present application provides a near-infrared two-region AIE probe and a nano material for light-activated treatment of bladder cancer, and belongs to the technical field of material chemistry. In view of the poor treatment effect of photothermal therapy on bladder cancer, the present application designs an AIE probe capable of efficient photo-thermal conversion in the near-infrared two-region, and on the basis of the AIE probe, the AIE probe is blended with a heat-sensitive NO donor to release NO through near-infrared light-induced photo-thermal conversion. After being encapsulated by an amphiphilic polymer, the surface of the cell membrane is modified with PMCA calcium ion channel blocking peptides and tumor surface FGFR1 receptor targeting peptides. The PMCA calcium ion channel blocking peptides on the surface of the cell membrane and the NO released by the heat-sensitive NO donor jointly act on the calcium ion channel through endogenous and exogenous combined regulation, causing calcium overload in the tumor and inducing tumor cell apoptosis. The tumor surface FGFR1 receptor targeting peptides on the surface of the cell membrane can realize efficient enrichment of the nano material at the tumor site, thereby improving the treatment effect. The material provided by the present application provides a new idea for the treatment of bladder cancer.

There is provided a thermogel-drug composition comprising: a thermogel polymer comprising one or more repeating units derived from a hydrophilic polymer, one or more repeating units derived from a thermoresponsive polymer, and one or more repeating units derived from a vinyl-containing diol monomer; and a drug or a drug analog encapsulated by said thermogel polymer.

The invention provides a self-suspension hydrophilic / hydrophobic photocatalytic sphere as well as a preparation method and application thereof, and belongs to the technical field of water treatment. The photocatalytic sphere is prepared by encapsulating and fixing a photocatalyst by a polymer, and has a hollow structure; the polymer is a mixture of hydrophilic polyvinylidene fluoride (PVDF) and polyvinyl alcohol (PVA) or hydrophobic PVDF. The preparation method comprises the following steps: preparing different photocatalyst mixed slurry by selecting different reagent feeding ratios, carrying out vacuum defoaming treatment on the slurry for 1 hour, and carrying out ice water hanging drop microsphere forming, cleaning purification and freeze drying treatment under the action of self-gravity, thereby obtaining the photocatalyst. The method is simple in preparation process, mild in condition, short in time consumption, environment-friendly and beneficial to large-scale production. The prepared self-suspension hydrophilic / hydrophobic photocatalytic spheres are used for separating hydrophilic / hydrophobic organic pollutants in water treatment, the photocatalytic performance is improved, long-time suspension, simple recovery and cyclic regeneration are realized, and the method has economic feasibility.

The invention relates to the technical field of polymer packaging material viscoelasticity constitutive model testing, in particular to an improved polymer packaging material viscoelasticity constitutive model testing and fitting method.The method includes the steps that an actual stress relaxation curve and a main curve are subjected to overlapping mean value re-fitting, and the shape and parameters of the main curve are optimized; replacing the energy storage modulus translation amount with the relaxation modulus translation amount to optimize a shift factor; an interpolation method is adopted to replace a WLF equation in numerical calculation, so that the input precision is improved; sample errors and human experience errors are reduced from multiple links of testing, fitting and numerical calculation, and fitting deviation of a WLF equation is eliminated, so that the model keeps high precision in a wider temperature range, and closed-loop verification of viscoelasticity testing is realized; a high-precision material test engineering scheme is provided for advanced electronic packaging, the production loss is reduced, the prediction capacity for packaging signals, heat transfer and stress is remarkably improved, the product yield is increased, the service life is prolonged, and the long-term reliability is improved.

The application discloses a packaging method and structure for a flexible thermoelectric element, and relates to the technical field of semiconductor device preparation.The packaging method comprises the following steps: preparing a thermoelectric series structure, wherein the thermoelectric series structure comprises an electrode layer, a P-type thermoelectric arm and an N-type thermoelectric arm; the electrode layer is composed of a plurality of metal electrodes; a cloth adhesive is coated on the outer surface of the electrode layer; a first packaging layer is attached to the outer side of the electrode layer of the thermoelectric series structure; a second packaging layer is attached to the outer side of the electrode layer of the thermoelectric series structure; finally, the packaging of the flexible thermoelectric element is completed after static pressure forming; the application adopts a non-continuous bonding structure of packaging cloth to package the thermoelectric element, and replaces traditional dense polymer packaging materials; by using the unique packaging mode of "point bonding and surface ventilation" between the packaging cloth and the device, the stability and comfort of the device structure are ensured.

The invention relates to an optical fiber type quantum dot temperature detection probe and a manufacturing method thereof, the optical fiber type quantum dot temperature detection probe comprises an optical fiber end face, an end face hydrophilic layer is arranged on the optical fiber end face, a quantum dot close-packed single-layer array is prepared on the end face hydrophilic layer, and a dielectric nano spherical particle single-layer array is prepared on the quantum dot close-packed single-layer array. A polymer packaging layer is arranged on the outer side of the quantum dot dense-arrangement single-layer array and the outer side of the dielectric nano spherical particle single-layer array, the quantum dot dense-arrangement single-layer array is a fluorescence signal generation layer, and the dielectric nano spherical particle single-layer array is a scattering enhancement layer; the optical fiber type quantum dot temperature detection probe is respectively connected with a laser and a spectrograph through branched optical fibers, and the spectrograph is connected with a computer to form a temperature detection device; a fluorescence spectrum emitted after the quantum dots are excited is scattered and enhanced by the dielectric nano spherical particle array and then is transmitted to a spectrograph, and a spectral signal is processed by a computer to obtain the local temperature of the end face of the optical fiber; the fluorescence signal intensity and consistency of the quantum dots are improved, and high-sensitivity detection of the environment temperature is achieved.

This invention provides a method for separating optical isomers of single-walled carbon nanotubes. The separation method includes: mixing single-walled carbon nanotube raw materials, a conjugated polymer, and an organic medium to form a mixed system, wherein the organic medium contains a chiral organic component; dispersing the mixed system so that the conjugated polymer, with the participation of the organic component, selectively encapsulates and disperses single-walled carbon nanotubes of the target chiral and optically active configurations, forming a dispersed system; and post-processing the dispersed system. By adding a chiral organic component, this invention allows the chiral recognition process to occur simultaneously with the polymer encapsulation process, enabling differential selection of different optical isomers of carbon nanotubes. This achieves a higher level of fine separation, moving beyond chiral type separation to optical isomer separation. It eliminates the need for covalent modification of the carbon nanotubes, thus better preserving their intrinsic structure and excellent optical properties.

The application belongs to the field of battery materials, and discloses a near-zero expansion silicon-carbon negative electrode material and a preparation method and application thereof. The negative electrode material comprises, from inside to outside, an inner composite region, an outer composite region and an encapsulation layer. The inner composite region comprises a first carbon framework and nano silicon particles, and the nano silicon particles are distributed in the mesopores of the first carbon framework. The outer composite region comprises a second carbon framework and nano silicon particles, and the nano silicon particles are distributed in the micropores of the second carbon framework. The encapsulation layer is a functional polymer encapsulation layer, and the encapsulation layer at least coats part of the surface of the particles formed by the outer composite region and the inner composite region. The mesoporous carbon framework of the inner composite region provides a buffer for silicon volume expansion and guarantees ion transmission, the microporous carbon framework of the outer composite region limits silicon deformation, and the encapsulation layer has the functions of isolating electrolyte, anchoring reinforcement and electrical conductivity. The three form a gradient protection, realize near-zero expansion, balance capacity performance, expansion performance and cycle stability, obtain relatively optimal capacity and cycle performance, and have a relatively low expansion rate.

This application relates to the field of semiconductor technology and provides a method for preparing and analyzing high-power bare chip failure analysis samples. The method includes: fixing the back surface of the high-power bare chip under test to the patch area of ​​a carrier substrate; wire bonding the functional electrode area on the amorphous back surface of the chip to the lead pads of the carrier substrate; preparing a polymer encapsulation layer on the amorphous back surface to obtain a molded high-power bare chip; peeling the molded high-power bare chip from the patch area of ​​the carrier substrate; grinding, fine polishing, and thinning the back surface to obtain the target failure analysis sample; powering the target failure analysis sample by connecting the lead pads outside the back surface area; observing the back surface area of ​​the target failure analysis sample to determine the failure location. This application not only avoids high-power bare chips being broken down or burned by high voltage and high current in failure analysis scenarios, but also significantly improves the sample preparation efficiency and quality of high-power bare chip failure samples.

Various aspects of photovoltaic modules are provided herein, including: an outer glass layer, an inner glass layer, a PV structures disposed on the outer glass layer, and a polymeric encapsulant having a tailored thickness and tailored elastic modulus is disposed over the PV structures and between the inner and outer glass layers, where outer glass layer is at least three times thinner than the inner glass layer; such that the module exhibits a failure probability (Pf) of less than 15% when tested according to the IEC 61215 & ASTM E1038 Hail Test.

The utility model belongs to the technical field of electronic materials and devices, and particularly relates to an N2200-based top gate bottom contact polymer field effect transistor, which comprises a substrate, and an organic semiconductor layer, a polymer dielectric layer and a polymer packaging layer which are sequentially arranged on the substrate and are made of N2200, one end of the organic semiconductor layer is electrically connected with a source electrode, and the other end is electrically connected with a drain electrode; a grid electrode is arranged between the polymer dielectric layer and the polymer packaging layer, and the grid electrode is electrically connected with the polymer dielectric layer; and the organic semiconductor layer is made of a material of poly (naphthalene diimine)-bithiophene P (DNI2OD-T2), namely N2200. According to the utility model, N2200 is used as the organic semiconductor layer, nickel and gold are evaporated on the substrate to serve as the source and drain electrodes, polymethyl methacrylate is used as the dielectric layer, the top-gate bottom-contact high-performance transistor is prepared, and meanwhile, the packaging layer is added on the surface of the organic field effect transistor by a simple spin-coating method, so that the surface defects of a packaging film can be effectively reduced, and the reliability of the organic field effect transistor is improved. The operation is simple and the complexity is reduced.

The invention discloses an ultrasound-guided nerve block puncture needle and a medicine injection method thereof, and relates to the technical field of medical instruments, the ultrasound-guided nerve block puncture needle comprises a needle tube, a needle head arranged at one end of the needle tube, a needle core arranged in the needle tube, and a liquid guide tube arranged on the needle tube and communicated with the needle tube, a substrate layer for improving the echo intensity is arranged on the needle head, a microarray structure for expanding the effective reflection area is arranged on the substrate layer, a polymer packaging layer is arranged on the microarray structure, a strong ultrasonic echo basis can be provided by arranging the substrate layer, the microarray structure is arranged on the substrate layer, and the ultrasonic echo intensity can be improved by arranging the polymer packaging layer on the substrate layer. A clear image of the whole side wall of the puncture needle can be reconstructed by ultrasonic equipment, the fragile microstructure can be protected by arranging the polymer packaging layer, the acoustic conversion process is further optimized by selecting a polymer material with proper acoustic impedance, and meanwhile friction is reduced.

The invention provides a graphene phase change material polymerization packaged integrated heat dissipation device and a preparation method thereof, and the preparation method comprises the following steps: mixing a graphene material with a phase change material to prepare a graphene phase change matrix; processing in the graphene phase change matrix to form a micro-channel structure; the method comprises the following steps: depositing a polyamide acid precursor on the surface of a graphene phase change substrate to obtain a polyamide acid precursor film, then carrying out thermal imidization treatment to obtain a continuous polyimide polymer packaging film, then injecting a cooling liquid into a micro-channel of the heat dissipation device, and carrying out packaging to obtain the integrated heat dissipation device. The graphene phase change matrix improves the heat conductivity coefficient and realizes light weight, so that the requirements of high efficiency and low-weight heat dissipation are met; the micro-channel structure and the phase change material function cooperate to realize integration of energy storage, heat conduction and heat dissipation, and the heat dissipation power is improved; an ultrathin polyimide packaging film is formed through polymerization packaging, and zero-wrapping-edge insulation packaging of a complex structure is achieved.

The invention provides a preparation method of a sulfonated polyaniline coated Prussian blue analogue derived ferromanganese oxide composite electrode, which comprises the following steps: firstly, synthesizing novel sulfonated polyaniline (SPANi) through copolymerization of aniline and 2-aminobenzene sulfonic acid, so that a sulfonic acid group (-SO3H) is fixed on a PANi main chain to serve as a proton library to provide protons for PANi; the oxidation-reduction reaction is promoted; and the pseudocapacitance characteristic is enhanced. And then further carrying out in-situ polymerization on the SPANi on a manganese iron oxide (MFO) derived from a Prussian blue analogue, so as to prepare the conducting polymer encapsulated bimetallic oxide hollow nanocube composite material SPANi / MFO. Wherein the SPANi not only coats the surface of the MFO, but also fills the cavity of the MFO, and the mass ratio of the SPANi to the MFO is 1: (0.01-0.1). The composite electrode prepared by the invention has the advantages of high capacitance capacity and rate capability and long-term cycle stability, and solves the problem of continuous capacity loss of a conductive polymer-based electrode in the operation of a supercapacitor. According to the invention, the development and application of the functional nano material electrode coated with the conductive polymer for the supercapacitor can be promoted.