13results about How to "Good stretchability" patented technology

This invention belongs to the field of membrane separation technology, specifically relating to a method for preparing a polytetrafluoroethylene (PTFE) composite membrane. The preparation method includes: (1) dissolving a spinning aid, a barium source, a titanium source, and a manganese source in a composite solvent, and then electrospinning to obtain precursor fibers; subsequently, blending the precursor fibers with a grain refiner, and heat-treating to obtain doped ferroelectric fiber bundles; (2) further polymerizing organic acids, inorganic acids, conductive fillers, and conductive polymers with monomers and oxidants to finally obtain a conductive polyaniline composite; (3) incorporating Mxene and the conductive polyaniline composite into an aqueous PTFE emulsion, and then further incorporating the doped ferroelectric fiber bundles and stirring to obtain a suspension; the suspension is then coated, post-treated, and kept warm to obtain a PTFE composite membrane. This invention improves the long-term fouling resistance of the PTFE membrane by doping the doped ferroelectric fiber bundles, the conductive polyaniline composite, Mxene, and PTFE.

The application discloses an impact-resistant high-thermal-conductivity polyphenylene sulfide composite material and a preparation method thereof, and relates to the technical field of plastic processing. The preparation method comprises the following steps: S1, preparation of a highly oriented PPS fiber insert; and S2, preparation of the impact-resistant high-thermal-conductivity PPS composite material. The application provides an impact-resistant high-thermal-conductivity PPS composite material and a preparation method thereof. Firstly, the viscoelasticity of PPS resin is improved by using high-melt-viscosity and high-temperature-resistant aromatic polyamide, the interfacial compatibility of PPS / aromatic polyamide is enhanced by using a functionalized polysulfone-based resin as a compatibilizer, so that the stretchability and the tensile orientation degree of PPS are improved; PPS composite fibers are obtained by using a melt spinning machine, and a fiber solid-phase high-multiple-stretching-annealing forming process is established, so that the high-toughness and highly oriented PPS composite fiber material is obtained.

This invention relates to the field of medical biopolymer materials technology, specifically to an injectable hydrogel for kidney stone removal, its preparation method, and its application. The preparation materials include at least a precursor solution 1 and a precursor solution 2. Precursor solution 1 contains at least a polyethylene glycol derivative and a thickener, while precursor solution 2 contains at least a polyamino polymer. By optimizing the formulation ratio of the two-component precursor solutions, a hydrogel with strong conformability, good toughness, and viscosity is formed in situ in the kidney stone area. This encapsulates the kidney stone, facilitating its removal from the body and avoiding the safety hazards associated with small kidney stone fragments or conventional drug treatment.

The invention discloses an electrochemical biosensor as well as a preparation method and application thereof, belongs to the technical field of detection, and aims to improve the detection sensitivity, specificity and detection accuracy of key biochemical substances of neurodegenerative diseases. The sensor comprises a substrate layer, a liquid inlet, a liquid outlet, a reference electrode and a counter electrode, the substrate layer comprises a PDMS flexible lower cover layer, a P3HT-Cu NWs conductive sensitive layer and a PDMS flexible upper cover layer, a micro-channel layer is arranged on the PDMS flexible upper cover layer, a channel is arranged in the micro-channel layer, and the P3HT-Cu NWs conductive sensitive layer is connected with a flexible flat cable. The preparation method comprises the following steps: preparing Cu NWs, preparing a P3HT-Cu NWs mixed solution, preparing a PDMS flexible lower cover layer, coating the PDMS flexible lower cover layer with the P3HT-Cu NWs mixed solution to obtain a P3HT-Cu NWs conductive sensitive layer, preparing a PDMS flexible upper cover layer, and bonding and sealing the PDMS flexible lower cover layer and the PDMS flexible upper cover layer to obtain the substrate layer.

This invention relates to the fields of fertilizers and biotechnology, specifically a compound microbial agent for promoting legume growth. The compound microbial agent is composed of 25-35 parts microbial agent, 10-20 parts bioactive agent, 10-15 parts bioactivator, and 30-55 parts water. This invention utilizes the role of microorganisms in preventing plant diseases and / or promoting plant growth. Endophytic bacteria 3G1, isolated from rice seeds, promotes legume root growth and has a 100% successful colonization rate, directly impacting plant growth. Combined with the low-temperature resistance and plant disease resistance functions of other compound microbial agents, it has growth-promoting and disease-preventing effects on legumes. The bioactive agent, a lipopeptide, increases leaf spread, promotes the absorption of the compound microbial agent, increases its activity, and increases crop yield by 3%. The bioactivator provides trace elements necessary for plant growth; when used in conjunction with the compound microbial agent, it effectively promotes seedling growth, improves seedling resistance, and achieves a transplant survival rate as high as 98%.

The utility model relates to a continuous carbon fiber surface sizing treatment production line, which comprises a continuous yarn releasing device, a continuous yarn feeding device, a continuous yarn feeding device, a continuous yarn feeding device and a continuous yarn feeding device, wherein the continuous yarn feeding device comprises a creel; the creel is provided with a plurality of yarn feeding rollers for winding carbon fiber tows; the sizing device comprises a dipping tank, a guide assembly is arranged in the dipping tank to receive the carbon fiber tows fed by the yarn discharging roller, a spraying assembly is arranged on the periphery of the guide assembly, and the spraying assembly is connected with a slurry supply mechanism; the drying device comprises a ceramic tube, carbon fibers penetrate through the interior of the ceramic tube, and a plurality of heating elements are connected to the periphery of the ceramic tube in a sleeving mode in the axis direction of the ceramic tube; the broadening device comprises a transverse vibration roller assembly and a vertical vibration roller assembly which are used for being in contact with the carbon fibers sent out by the drying device; the winding device comprises a winding roller, the winding roller is used for winding the broadened carbon fiber tows, the winding roller is connected with a rotation driving mechanism to provide power for conveying the carbon fibers, and the production line is high in production efficiency.

The present application belongs to the field of flexible strain sensing, and particularly relates to a deformation couple for a flexible strain sensor, a manufacturing method thereof and an application thereof. The deformation couple for the flexible strain sensor comprises two polymer films adhered to each other face to face. Both of the polymer films have good ductility and flexibility. The two polymer films have different adsorption capacities for electrons during deformation. The manufacturing method of the deformation couple comprises preparing two polymer films, applying a liquid form of one of the polymer films on one of the films to adhere the two films. The application of the deformation couple for the flexible strain sensor comprises sensing the movement of a joint or a muscle, or sensing the writing of a finger or a pen point thereon. The present application has excellent flexibility and stretchability, can adapt to various complex movements and deformations, and meanwhile maintains stable performance. The present application has a self-power supply characteristic, and does not need an external power supply.

The application provides a graphene stretchable sound emitting device based on a thermoacoustic effect and related components, and the graphene stretchable sound emitting device comprises a substrate, a graphene dielectric layer, contact metal and a wire medium; the substrate is a stretchable structure, the graphene dielectric layer is a three-dimensional structure layer formed by printing and permeating graphene mixed with deionized water ink into the substrate, the contact metal is arranged on the substrate and located on both sides of the graphene dielectric layer, one end of the wire medium is arranged in the contact metal, and the other end of the wire medium is connected with an output end of an audio player. The graphene stretchable sound emitting device has good stretchability and strong practicability.

This invention discloses an intrinsically stretchable room-temperature phosphorescent polymer material and its preparation method, belonging to the field of polymer material preparation technology. This invention controls the chain length of the polymer material through atom transfer radical polymerization, controls the hydrophilicity / hydrophobicity of the blocks through hydrolysis, and then, through self-assembly, allows the basic units to spontaneously aggregate into a stable structure with a certain regular geometric appearance under non-covalent interactions. This effectively reduces the S1→T1 energy level difference, realizes more intersystem crossing (ISC) channels, and significantly enhances the spin-orbit coupling effect. This invention can effectively promote the occurrence of ISC, resulting in a long-afterglow polymer material with both long lifetime and high stretchability at room temperature, achieving a luminescence lifetime of 4 s and an elongation at break of 200%.

The application provides a self-repairing material based on nucleobase pairs, and a preparation method and application thereof. The self-repairing material comprises a modified matrix material and modified graphene two-dimensional nanosheets embedded in the modified matrix material; the modified graphene two-dimensional nanosheets comprise graphene oxide modified by a modifier containing dynamic hydrogen bonds; and the modified matrix material comprises a matrix material modified by a monomer containing six-times azido and / or a nucleobase chain extender. In the self-repairing material provided by the application, the interface between the modified graphene two-dimensional nanosheets and the polyurethane matrix material is due to the existence of high-density nucleobase pair hydrogen bonds, so that the graphene two-dimensional nanosheets are arranged in the polyurethane matrix material in a parallel arrangement, have a biomimetic inverse nacre structure, and thus the mechanical strength of the self-repairing material is improved, and the self-repairing material has excellent stretchable performance.

The application discloses an antibacterial and wound healing promoting nanocomposite film as well as a preparation method and application thereof. The nanocomposite film is obtained by repeatedly freezing and thawing a mixed solution of polyvinyl alcohol, lignin and MXene to form a crosslinked network. The mass ratio of the polyvinyl alcohol, the lignin and the MXene is 1:4:(0.0025-0.04). The application introduces MXene and LS into a PVA hydrogel system, endows the composite film with good mechanical properties, biocompatibility and antibacterial activity, and the composite film has moderate swelling performance and conductivity. The nanocomposite film of the application is non-toxic and has good chemical stability. The nanocomposite film can promote wound healing, significantly reduce inflammatory response, promote the formation of new blood vessels, strengthen nutrient transport, and can be combined with electric stimulation to further promote wound healing, and has a broad application prospect in the field of wound dressings.

A method for preparing a stretchable electrode, (1) preparing a mixed solution of an organic semiconductor and a dopant: dissolving the organic semiconductor and the dopant in a solvent respectively, mixing them according to a certain molar ratio to form a mixed solution; (2) preparing a patterned transfer medium; (3) preparing a conductive film: spin coating the mixed solution in step (1) on the patterned transfer medium to obtain a conductive film; (4) preparing an electrode: transferring the conductive film to an electrode area of a device to form an electrode. The electrode obtained by the method can effectively control the conductivity, work function and film quality by adjusting the electrode composition or doping ratio, and has excellent mechanical and optical properties.

This invention discloses a method for preparing a high-conductivity PEDOT:PSS conductive framework, comprising: filtering an aqueous solution of PEDOT:PSS; adding an anionic surfactant to separate the PEDOT:PSS phase and reduce the surface activity of the solution, obtaining a mixed solution; adding the mixed solution and air in a predetermined ratio to a dual-syringe mixing container, mixing and shearing to obtain a PEDOT:PSS foam emulsion; adding the obtained foam emulsion to a specific template and allowing it to slowly solidify; washing the solidified PEDOT:PSS foam with water to remove the surfactant and some PSS; and finally freeze-drying to remove moisture to obtain a high-conductivity PEDOT:PSS conductive framework. The PEDOT:PSS conductive framework prepared by this invention exhibits excellent water / oil stability, higher conductivity, lower framework density, and superior mechanical properties.