10 results about "Intermediate Fiber" patented technology

The invention provides a carbon fiber recovery method and a carbon fiber. The carbon fiber recovery method comprises the following steps: treating a carbon fiber prepreg into a chopped material with a preset size; placing the chopped material in an acidic medium, and carrying out first treatment under the action of a phase transfer catalyst to obtain an intermediate fiber product; and placing the intermediate fiber product in an alkaline medium, and carrying out second treatment under the action of a phase transfer catalyst to obtain the carbon fiber. According to the carbon fiber recovery method provided by the invention, through sequential design of acidolysis (first treatment)-alkali washing (second treatment), the problem of interface pollutant residues in carbon fiber recovery is solved. A first treatment process in an acidic medium exfoliates the polymer matrix, clearing obstacles for a subsequent second treatment in an alkaline medium. In the second treatment process in the alkaline medium, the interface of the intermediate fiber product is cleaned, the sizing agent is thoroughly removed, the performance of the carbon fibers can be reserved through the recycling method, and the clean carbon fibers can be obtained.

This invention discloses a silk fibroin-based biomimetic artificial tympanic membrane with a gradient structure and its preparation method, comprising the following steps: encapsulating and dissolving an antibacterial drug in an organic solvent and then adding it dropwise to a silk fibroin solution; casting the film and inducing the formation of a β-sheet structure with methanol to obtain an outer dense layer; electrospinning the silk fibroin solution to obtain oriented silk fibroin fiber felt, and cross-linking it in an ethanol solution to obtain an intermediate fiber layer; mixing the silk fibroin solution with a pore-forming agent and casting it onto the intermediate fiber layer; covering the intermediate fiber layer with the outer dense layer; after pre-freezing and lyophilizing, immersing the membrane in deionized water to dissolve the pore-forming agent to form an inner porous layer; then placing it in a PBS buffer containing growth factors and shaking treatment; and finally drying to obtain the silk fibroin-based biomimetic artificial tympanic membrane with a gradient structure. This invention's three-layer biomimetic artificial tympanic membrane possesses antibacterial and regenerative functions, while also exhibiting excellent mechanical properties, meeting the requirements of a biomimetic tympanic membrane.

The invention discloses a silk fibroin-based bionic artificial tympanic membrane with a gradient structure and a preparation method thereof, and the preparation method comprises the following steps: wrapping and dissolving an antibacterial drug in an organic solvent, then dropwise adding into a silk fibroin solution, casting to form a membrane, and then inducing by methanol to form a beta-folded structure to obtain an outer compact layer; carrying out electrostatic spinning on the silk fibroin solution to obtain a directionally arranged silk fibroin fiber felt, and soaking and cross-linking in an ethanol solution to obtain a middle fiber layer; mixing the silk fibroin solution with a pore-foaming agent, and pouring the mixture on the middle fiber layer; covering the middle fiber layer with the outer compact layer, pre-freezing and freeze-drying, immersing into deionized water to dissolve out the pore-foaming agent so as to form an inner porous layer, putting into a PBS buffer solution containing growth factors for oscillation treatment, and drying, thereby obtaining the silk fibroin-based bionic artificial tympanic membrane with the gradient structure. The artificial tympanic membrane with the three-layer bionic structure has antibacterial and regeneration promoting functions, has excellent mechanical properties and meets the requirements of bionic tympanic membranes.

This application relates to the field of fiber material technology and provides a pretreatment method for composite fiber structural materials. The pretreatment method includes the following steps: S100, performing surface cleaning pretreatment on the composite fiber structural material to obtain pre-cleaned fibers; S200, adding the pre-cleaned fibers to a surface treatment solution for selective surface swelling and roughening treatment to obtain intermediate fibers; S300, performing termination treatment and washing treatment on the intermediate fibers to obtain pretreated composite fibers. This application improves the surface roughness and surface activity of the fibers by selectively swelling and roughening the composite fiber structural material, combined with termination treatment and washing treatment, while maintaining the basic integrity of the fiber's main structure, thus providing more favorable surface conditions for subsequent interfacial bonding and composite processing.

The invention discloses a flame-retardant cellulose fiber and a preparation method thereof, and belongs to the technical field of flame-retardant materials. The method comprises the following steps: dispersing more than two flame-retardant substances in water to prepare a dispersion liquid of the flame-retardant substances, the value range of the total mass percentage content of the more than two flame-retardant substances in the dispersion liquid of the flame-retardant substances being 5%-30%; an intermediate fiber product is prepared on the basis of a mixture of dispersion liquid of a flame-retardant substance, an NMMO solvent and cellulose according to a lyocell fiber preparation method, the value range of the mass ratio of the dispersion liquid of the flame-retardant substance to the cellulose is 15%-55%, and the value range of the mass ratio of the cellulose to the NMMO solvent is 11%-19%; and carrying out post-treatment on the intermediate fiber product to prepare the flame-retardant cellulose fiber. The fiber is prepared through the method, and the flame retardant property of the fiber can be kept after the fiber is washed for multiple times.

A method for recycling a carbon fiber-reinforced resin including a carbon fiber and a matrix resin is provided, and the method includes: a first heating step of heating the carbon fiber-reinforced resin to decompose the matrix resin so as to obtain an intermediate in which the decomposition residue of the matrix resin is adhered to the carbon fiber; an unwinding step of unwinding an intermediate fiber from the intermediate; a second heating step of heating the unwound intermediate fiber to decompose the decomposition residue of the matrix resin adhered to the intermediate fiber so as to obtain a recycled carbon fiber; and a winding step of winding the recycled carbon fiber.

A composite coil spring includes a coil body that extends along a coiled axis. The coil body includes a polymer matrix and, disposed in the polymer matrix, a carbon fiber core and a plurality of fiber layers wrapped around the carbon fiber core in alternating oblique fiber angles to the coiled axis. The fiber layers include, from inside-out starting from the carbon fiber core, at least two consecutive carbon fiber intermediate fiber layers of alternating oblique fiber angles to the coiled axis, immediately followed by at least two consecutive glass fiber intermediate fiber layers of alternating oblique fiber angles to the coiled axis, and immediately followed by a carbon fiber outermost fiber layer.

The application relates to a multi-fiber laser ablation treatment brain glioma planning method, device and equipment. The method comprises the following steps: according to pre-acquired image information and segmentation results of a tumor region of a target patient, sequentially performing segmentation sampling processing on the image information to obtain a candidate fiber path set; according to a fiber planning objective function and a fiber planning constraint condition, performing screening processing on the candidate fiber path set to obtain an intermediate fiber path set, and determining the number of fibers required for tumor ablation according to the intermediate fiber path set; and according to the number of fibers required for tumor ablation and a pre-determined path evaluation score, determining a target fiber path set from the intermediate fiber path set; and the target fiber path set at least comprises position information corresponding to each target fiber path. The method can improve the tumor ablation rate and reduce the use of fibers.

The invention discloses anti-puncture food packaging paper and application thereof in packaging bags, and belongs to the technical field of packaging papers.The anti-puncture food packaging paper is prepared by taking isolated whey protein and octenyl succinic anhydride modified starch as raw materials, conducting alkaline glycosylation-acid fibrosis composite modification to obtain starch whey composite powder, conducting blending pulping on the starch whey composite powder and softwood pulp, conducting papermaking and forming, and conducting drying and packaging to obtain the anti-puncture food packaging paper. The preparation method comprises the following steps: preparing a gallic acid-modified waterborne polyurethane emulsion by adopting an in-situ chain extension cross-linking emulsification method to obtain enhanced food packaging base paper, preparing the gallic acid-modified waterborne polyurethane emulsion by adopting an in-situ chain extension cross-linking emulsification method, and performing bar coating, drying and curing to obtain the anti-puncture food packaging paper. By constructing a three-layer composite structure composed of an internal tough protein fiber network, an external tough polyurethane coating and a middle fiber skeleton, the problems that existing grease-resistant packaging paper is crisp and hard in texture and poor in puncture resistance due to the fact that rigid inorganic filler is added are effectively solved; the packaging box is suitable for packaging scenes containing sharp objects and high-grease food.

The embodiment of the invention discloses an interface bonding method of an all-solid-state battery and the all-solid-state battery. The method comprises the following steps: providing a negative pole piece, an electrolyte layer, a first spinning solution and a second spinning solution; performing electrostatic spinning treatment on the first spinning solution, and coating the first spinning solution on a negative pole piece to obtain a silicon-loving film; performing electrostatic spinning treatment on the second spinning solution, coating the second spinning solution on the silicon-loving membrane to obtain a sulfide-loving membrane, and taking the silicon-loving membrane and the sulfide-loving membrane as an intermediate fiber membrane; and covering the middle fiber membrane with an electrolyte layer to complete interface bonding between the negative pole piece and the electrolyte layer. According to the interface bonding method of the all-solid-state battery, the intermediate fiber membrane is prepared between the negative pole piece and the electrolyte layer through electrostatic spinning treatment, stable contact of the interface and stable and efficient lithium ion transmission are guaranteed, the overall electrochemical performance of the all-solid-state battery is improved, and meanwhile, safe and stable large-scale production conditions are achieved.