676results about "Physical treatment" patented technology

The invention belongs to the technical field of personal protection equipment, and particularly relates to a lightweight cut-resistant four-dimensional structure fabric based on high-performance composite fibers and a preparation method of the lightweight cut-resistant four-dimensional structure fabric. The structure is based on a high-performance composite fiber material and a nano silicon carbide embedding technology of high-performance polyethylene fibers, the hardness bottleneck of a single material is broken through, and multi-fiber compatibility is improved through cooperation of polyurethane fiber surface activation and polyurethane fiber anti-melting modification. The gradient twist core sheath yarn is a high-performance composite yarn, and the strength and the flexibility are balanced. In the aspect of the oversleeve fabric structure, a three-dimensional protection system comprising a honeycomb structure, a silica gel liner and a skin-friendly inner layer is adopted, so that the integration of multiple functions of hydrophobicity, fusion resistance and buffering of a light-weight cut-resistant material is realized. Under the EN 388 standard, 5-level cutting prevention can be achieved, a single high-performance polyethylene fiber cutting prevention oversleeve can only reach 3-4 levels, the weight of the composite fiber material is reduced by 40% compared with that of a full aramid fiber oversleeve, the thickness is reduced by 25%, and the composite fiber material can be suitable for complex scenes such as petroleum and electric power.

The invention belongs to the technical field of functional composite fibers, and discloses a wear-resistant nanofiber-reinforced protective graphene fiber and a preparation method and application thereof.The wear-resistant nanofiber-reinforced protective graphene fiber comprises a graphene fiber tow and nanofibers, the nanofibers coat the graphene fiber tow in a three-dimensional porous network mode, and the nanofibers coat the graphene fiber tow in a three-dimensional porous network mode. Forming a stress buffer layer; wear-resistant particles are uniformly loaded in the three-dimensional porous network; the preparation method comprises the following steps: fixing the graphene fibers subjected to surface pretreatment on an electrostatic spinning nano-yarn machine, forming a nano-fiber membrane by utilizing electrostatic spinning, uniformly wrapping the graphene fibers subjected to surface pretreatment with the nano-fiber membrane, then rolling into a shaft, and then carrying out hot-pressing roller treatment on the rolled fiber bundle, so as to obtain the graphene nano-yarn. The wear-resistant nanofiber reinforced protective graphene fiber is prepared; the graphene fiber is used for weaving to obtain the graphene fiber fabric. The fiber prepared by the invention and a fabric woven by using the fiber have excellent mechanical properties, wear resistance, electric conductivity and heat conductivity.

The invention discloses a preparation method of a conductive thermal response drug release suture line, the obtained suture line has an inner conductive sensing functional coating and an outer thermal response drug-loading temperature-sensitive hydrogel functional coating, the inner coating has conductivity, heating property and wound sensing function, and the outer coating has thermal response drug-loading temperature-sensitive hydrogel functional coating. The outer coating has the functions of adhesion, drug carrying and thermal response drug release, the suture line is simple in process and convenient to operate, drug release can be regulated and controlled according to conductive thermal response, and the requirements of postoperative wound monitoring and on-demand treatment can be met.

The invention discloses an anti-wrinkle wear-resistant flax blended yarn and a processing technology thereof, and relates to the technical field of textiles. The prepared flax blended yarn comprises natural fibers, modified polylactic acid fibers and ultra-high molecular weight polyethylene fibers. Wherein the natural fibers are obtained by performing degumming pretreatment on linen fibers and bamboo fibers and then mixing the linen fibers and the bamboo fibers with cotton fibers; graphene oxide is deposited on the surface of the fiber through dopamine polymerization, so that the wear resistance of the yarn is improved; the modified polylactic acid fibers are obtained through melt spinning of polylactic acid, poly (adipic acid) / butylene terephthalate and modified chitin nanofibers, the compatibility of the chitin nanofibers and the polylactic acid is improved through polyethylene glycol, and the polylactic acid fibers are enhanced; coarse yarns are obtained through combing, drawing, roving and spinning, the coarse yarns are soaked in a finishing agent, and finally the finished blended yarns are obtained and have good wear resistance and wrinkle resistance.

The invention discloses a hydrophilic modification method of a carbon paper raw material carbon fiber. The hydrophilic modification method comprises the following steps: (1) pretreating carbon fibers; (2) preparing a hydrophilic reagent dopamine solution; (3) carrying out hydrophilic modification treatment on the carbon fibers; and (4) cleaning and drying the carbon fibers subjected to hydrophilic treatment. The method disclosed by the invention can be used for simply, efficiently and quickly carrying out hydrophilic modification treatment on the surface of the carbon fiber at low cost, and the obtained carbon fiber has excellent surface hydrophilic performance and good hydrophilic durability and is suitable for industrial continuous production.

The present invention belongs to the technical field of functional composite fibers, and discloses a wear-resistant nanofiber-reinforced and protected graphene fiber, a preparation method thereof and an application. The wear-resistant nanofiber-reinforced and protected graphene fiber comprises a graphene fiber bundle and nanofibers. The nanofibers coat the graphene fiber bundle in the form of a three-dimensional porous network to form a stress buffer layer; wear-resistant particles are uniformly loaded inside the three-dimensional porous network. The preparation method is as follows: fixing the surface-pretreated graphene fiber on an electrospinning nanofiber yarn machine, forming a nanofiber membrane by electrospinning and uniformly wrapping it on the surface-pretreated graphene fiber, then winding it into a roll, and then performing a hot roll treatment on the wound fiber bundle to obtain the wear-resistant nanofiber-reinforced and protected graphene fiber. The application is: used for weaving to obtain a graphene fiber fabric. The fiber prepared by the present invention and the fabric woven therefrom have excellent mechanical properties, wear resistance, electrical conductivity and thermal conductivity at the same time.

The invention discloses a preparation process of cutting-resistant and puncture-proof protective gloves, and belongs to the technical field of preparation methods of protective gloves. According to the technology, the four steps of pretreatment, composite coating material dipping, dipping of different butadiene-acrylonitrile rubber latexes and partitioned vulcanization treatment are adopted, balance of protection performance and wearing comfort is achieved through combination of technology optimization and material innovation, the cutting resistance of the prepared protective gloves reaches the grade E of the GB24541-2022 standard, the puncture resistance and the tear resistance both reach the grade 4, and the service life of the protective gloves is prolonged. And the composite material is good in air permeability and excellent in durability, is particularly suitable for high-risk operation scenes such as military, security and metal processing, and has remarkable technical progress and industrialization value.

The invention relates to the field of fabrics, in particular to a breathable composite fabric and a preparation process thereof.The breathable composite fabric is characterized in that base cloth and a reinforcing layer are subjected to composite crocheting through polyester fibers to obtain a fabric body, and then the fabric body is transferred to protective finishing liquid to be subjected to padding treatment; bamboo charcoal fibers and cotton fibers are blended to serve as warps, the cotton fibers serve as wefts, and the warps and the wefts are interwoven to form base cloth; bamboo charcoal fibers are selected as warps, polyester fibers are selected as wefts, and the warps and the wefts are interwoven to form a reinforcing layer; the preparation method comprises the following steps: modifying chitosan with acrylic acid to obtain soluble N-carboxyethyl chitosan; the preparation method comprises the following steps: quantitatively modifying vanillin methacrylate by gelatin, modifying the gelatin by dopamine, and then grafting hexaborophosphazene; the preparation method comprises the following steps: by taking zinc acetate as a zinc source and cellulose nanocrystals as a template, carrying out in-situ polymerization-precipitation to obtain composite cellulose nanocrystals, carrying out dopamine polymerization to obtain polydopamine-coated composite cellulose nanocrystals, and then grafting hexaborophosphazene to obtain the modified cellulose nanocrystals.

To provide a knitted fabric hard to reduce uniform dying property, and a production method of a dyed knitted fabric using the same.SOLUTION: A knitted fabric of the present invention in one embodiment includes: a mixed spun yarn (A) including a modified cellulosic fiber, and a regular cellulosic fiber; a spun yarn (B) including a regular cellulosic fiber; and a polyurethane elastic yarn, where the modified cellulosic fiber is obtained by introducing an ethylenic double bond, and a carboxyl group (-COOH) or a salt thereof to a regular cellulosic fiber, and the polyurethane elastic yarn can be heat-set at a temperature of lower than 180°C. The mass ratio of the modified cellulosic fiber included in the knitted fabric is preferably 3-30 mass% on the basis of total 100 mass% of mass ratios of the modified cellulosic fiber, the regular cellulosic fiber, and the polyurethane elastic yarn.SELECTED DRAWING: Figure 1

The invention relates to the technical field of material surface treatment, and discloses an epoxy impregnated aramid fiber composite paper treatment method based on non-thermal atmospheric plasmas, aramid fiber composite paper, a heterocyclic aramid fiber solution, an epoxy resin prepolymer, a curing agent and a solvent are prepared, after the aramid fiber composite paper is subjected to surface cleaning, non-thermal atmospheric plasma treatment is carried out, and the surface of the aramid fiber composite paper is dried to obtain the epoxy impregnated aramid fiber composite paper. The preparation method comprises the following steps: preparing a heterocyclic aramid solution, putting aramid composite paper into the heterocyclic aramid solution, carrying out primary impregnation, carrying out drying and curing after impregnation, preparing an epoxy resin prepolymer, putting the aramid composite paper into the epoxy resin prepolymer, carrying out secondary impregnation, removing excess resin after impregnation, and preparing the aramid composite paper with the excess resin removed, according to the method, the non-thermal atmosphere plasma treatment technology and the step-by-step impregnation technology are combined, the synergistic effect of heterocyclic aramid and epoxy resin can be fully exerted, and therefore the interface adhesive force between fibers is improved.

The invention belongs to the technical field of textile material processing, and particularly discloses a preparation method of high-strength low-shrinkage composite yarn for spinning. A preparation method of a high-strength low-shrinkage composite yarn for spinning comprises the following steps: (1) respectively drying ultra-high molecular weight polyethylene and PET polyester, adding maleic anhydride grafted PE, a treated metal organic framework material, boron carbide nanoparticles, cellulose acetate and a silane coupling agent KH550, uniformly mixing, and carrying out melt extrusion to obtain nascent fibers; (2) performing first-stage pre-drafting, second-stage high-temperature tension field drafting and third-stage low-temperature relaxation treatment on the nascent fiber to obtain treated fiber; and (3) dipping the treated fiber in an ethanol solution containing nano SiO, and performing infrared radiation curing to obtain the high-strength low-shrinkage composite yarn for spinning. The composite yarn has good mechanical strength, wear resistance and low contractibility, and the yarn has wide application due to the high breaking strength.

The invention discloses a full-polyester whole-core flame-retardant conveying belt and a preparation method thereof, and relates to the technical field of conveying belts. The conveying belt comprises a three-layer structure, wherein the inner layer is a plasma-treated full-polyester fiber belt core, the middle layer is a polyurethane flame-retardant composite layer, and the outer layer is a maleic anhydride modified nitrile rubber layer. The preparation method comprises the following steps: carrying out argon plasma treatment on the belt core, drying, preparing waterborne polyurethane resin, a phosphate flame retardant, nano-montmorillonite, a silane coupling agent and carbodiimide into impregnation liquid, carrying out vacuum impregnation on the belt core, and carrying out thermocuring to form the polyurethane composite layer, and finally, mixing the maleic anhydride grafted and modified nitrile rubber with an aluminum hydroxide flame retardant, and covering and vulcanizing. Through plasma activation, interface chemical bonding and a synergistic flame-retardant system, the product has excellent flame retardance and mechanical strength, and meanwhile the problem that layers of a traditional conveying belt are prone to layering is solved.

The invention relates to a preparation method of an insect-proof lyocell fiber, and belongs to a functional fiber preparation method in the chemical field. The invention provides a bio-based microcell barrier packaging solution aiming at three major defects of easy breakage, non-environmental response release and toxicity of a chemical cross-linking agent in the existing microcapsule coating. The pH response type microcapsule is constructed through double-layer alternate self-assembly of chitosan and phytic acid, a compact network barrier is formed by electrostatic crosslinking of positive and negative charges, and the structural stability is enhanced by combining a natural cross-linking agent genipin; in the fiber loading stage, plasma pretreatment is adopted to increase the surface roughness, vacuum negative pressure drives microcapsule permeation, and steam setting promotes anchoring setting. Core innovations include an intelligent release mechanism, washability breakthrough, ecological safety and actually measured performance display. The method solves the problem that the lyocell fiber is difficult to decompose the permethrin in the NMMO solvent system, and has the advantages of efficient protection and environmental friendliness.

The application discloses a medical natural antibacterial and antiviral mildew-proof wet non-woven fabric and a preparation method and application thereof, and belongs to the technical field of medical polymer materials and textiles. The non-woven fabric is prepared from the following raw materials: polyethylene terephthalate long fibers, polyethylene terephthalate short fibers, vinylon fibers and natural antibacterial and antiviral ultraviolet slow-release glue solution. The non-woven fabric is endowed with natural and non-toxic antibacterial and antiviral effects by using the extract of Chinese herbal medicine effective components. Meanwhile, the mechanical properties and the antibacterial and antiviral capacity of the non-woven fabric can be effectively improved by adding nano materials with far infrared function after surface modification to prepare high-efficiency natural antibacterial and antiviral ultraviolet slow-release microcapsule glue solution. The method improves the added value and application field of the wet non-woven fabric and is convenient for large-scale processing and production. The prepared wet non-woven fabric has excellent performance indexes, good air permeability and an antibacterial and antiviral efficiency of 99.99%.

The invention discloses natural fiber geotextile and a preparation method thereof, and relates to the field of environment-friendly materials.The preparation method comprises the following steps that natural fiber fabric is placed in chemical treatment liquid to be subjected to dipping-compression roller treatment to obtain treated fabric, and the treated fabric is subjected to irradiation treatment; the chemical treatment liquid is prepared by mixing asphalt emulsion, bisphenol A epoxy resin, unsaturated polyester resin, a curing agent and an initiator. The asphalt emulsion, bisphenol A epoxy resin and unsaturated polyester resin are used for filling pores of the natural fiber fabric, cross-linking is carried out to form a three-dimensional cross-linked network, and irradiation treatment is carried out. Under the comprehensive action, the mechanical strength of the natural fiber geotextile is improved, the moisture absorption rate is reduced, and the antibacterial rate is improved.

The invention belongs to the technical field of textile processing, and provides an array spinning reinforced composite yarn and a spinning method. In the invention, the nano array is generated by performing multi-jet polarization and ionization on the unsaturated solution by a needle-free electrostatic array ionization device, and the surface tension and ionization state of the unsaturated solution are changed by controlling the concentration and electrostatic voltage of the unsaturated solution. The jet flow and the liquid drops are charged in the electric field and break through the Rayleigh limit to be broken to form the nano array. After being embedded into a micron fiber net, the nano arrays are stably anchored on the surfaces of micron fibers through extremely high Van der Waals force and hydrogen bonds, the specific surface area of the micron fibers and the contact area between the fibers are increased, fiber cohesion and friction in yarn are enhanced, and mechanical enhancement (especially breaking strength) and quality improvement of regenerated fiber textiles are achieved.

Disclosed is a method of making high temperature fiber including chemically bonding high temperature material to a fiber template at a first temperature to form a precursor fiber and processing the precursor fiber at a second temperature to form the high temperature fiber. The first temperature does not equal the second temperature. Also disclosed are high temperature fibers made by the method.

The invention provides electronic-grade quartz glass fiber cloth and a preparation method thereof. The method comprises the following steps: selecting high-purity quartz sand, melting at high temperature, precisely filtering, and homogenizing; preparing a special impregnating compound; drawing fibers through a platinum-rhodium alloy bushing and coating the fibers with an impregnating compound; weaving into a cloth blank; performing high-temperature sintering treatment; the electrical property is improved through electron beam irradiation treatment; and cleaning with ultrapure water and drying to ensure the electronic grade cleanliness. According to the invention, high purity, uniformity and excellent electrical properties of the electronic-grade quartz glass fiber cloth can be ensured, and the requirements of the electronic industry on high-performance materials are met.

The invention discloses a fabric coloring method and a coated fabric, a magnetron sputtering method is adopted to deposit a color layer on the surface of a to-be-coated fabric, and the color layer comprises variable valence metal oxide; comprising the following steps that S1, a sputtering target material containing variable valence metal elements is taken, and Ar and O2 mixed gas is selected as a deposition atmosphere; s2, taking O2 flow a and Ar flow b when the stable valence metal oxide is deposited; s3, adjusting the flow rate of O2 to be c and the flow rate of Ar to be d, and depositing a color layer on the surface of the to-be-plated fabric; the O2 flow c and the Ar flow d meet the condition that c / (c + d) is more than or equal to 0 and less than or equal to a / (a + b) * 60%, and the unit of the gas flow is sccm. The prepared coated fabric is simple in structure, low in preparation cost and high in color fastness.

This invention relates to smart textile wearable device with embedded yarn sensors and a computing device comprising a processor and a computer readable medium having encoded thereon a machine learning program that gathers sensor data from the wearable device and generates health parameter output data or real time or long-term feedback to a user for interaction, health and exercise purposes.

The invention belongs to the technical field of biomedical materials, and particularly relates to a poly-4-methyl-1-pentene (PMP) gas-blood exchange membrane for an extracorporeal membrane oxygenation (ECMO) system, which realizes a long-acting antithrombotic function through a bionic interface construction technology. The invention aims to provide a bionic antithrombotic PMP gas-blood exchange membrane based on zwitter-ion gradient grafting, and through material and process innovation, the following problems existing in a traditional ECMO gas-blood exchange membrane: an antithrombotic coating is easy to fall off, and the long-term effect is insufficient; the risk of blood injury caused by dependence on heparin or anticoagulants; and the surface modification process destroys the membrane pore structure and air permeability.

Typical commercial surface treatments for continuous carbon fibers are often unavailable for discontinuous fibers. As such, there is little variety of chopped fiber surfaces leading to non-ideal coating solutions which result in poor interfacial compatibility between fibers and a composite matrix. A method of applying a highly effective coating using a high throughput technique for chopped carbon fibers. The method provides the ability to tune both the coating thickness and chemical functionality using processing parameters. The coatings are evaluated using X-ray photoelectron spectroscopy (XPS) for uniformity and composition. Using this technique, thermoplastic composites are highlighted showing an increase in interfacial shear strength (IFSS) of 25 MPa. This process shows promise for increasing the throughput of surface treatment of chopped fiber on the industrial scale.

The invention relates to the technical field of polymer absorbing materials, in particular to high-liquid-conductivity composite sodium polyacrylate water-absorbent resin, a preparation method and application. The water-absorbent resin is composed of a sodium polyacrylate matrix, low-melting-point ES fibers (accounting for 5-15% of the mass) activated through plasma or alkali etching and a surface cross-linking agent (such as glycerol and polyethylene glycol). The method comprises the following steps: melting a fiber sheath layer to coat SAP particles through one-time heat treatment (120-150 DEG C, 30-60 minutes), and meanwhile, constructing a surface chemical network by a cross-linking agent to form a physical-chemical dual structure. The composite SAP has excellent transverse drainage rate, wet compressive strength and circulation structure integrity, the liquid distribution efficiency and stability of the absorption core layer are remarkably improved, and the composite SAP is suitable for the field of hygienic products such as paper diapers and sanitary towels.

The invention belongs to the technical field of functional materials, and provides a waterproof, oil-proof and unidirectional sweat-guiding Janus fabric based on pH response and a preparation method thereof in order to solve the problem that in the prior art, the outer side of a Janus fabric does not have a waterproof function, and the outer side of a garment is easily wetted by water in rainy days and high-humidity environments, so that the fabric loses a unidirectional sweat-guiding function. The waterproof and oilproof one-way sweat-guiding Janus fabric based on pH response comprises a base material, a pH-responsive super-hydrophobic-oleophobic / super-hydrophilic-oleophobic layer is arranged on the outer surface of the base material, and a super-hydrophobic-oleophobic layer is arranged on the surface of the side, away from the base material, of the pH-responsive super-hydrophobic-oleophobic / super-hydrophilic-oleophobic layer. The Janus fabric prepared by the invention has unidirectional sweat-guiding, waterproof and oil-proof properties, and can be used as a dual-purpose functional textile.

The invention discloses a modification treatment process for carbon fibers, and belongs to the related technical field of carbon fiber production and processing, the modification treatment process comprises the following steps: S1, pretreatment of carbon fiber powder: cleaning and drying the recycled carbon fiber powder, and performing surface pretreatment; s2, introduction and fixation of a nano material: uniformly dispersing the nano material on the surface of the carbon fiber powder, and fixing the nano material through a physical or chemical method; s3, surface treatment: carrying out surface treatment on the carbon fiber powder by using a chemical reagent; s4, mixing the multifunctional modifier with the carbon fiber powder, and performing mechanical stirring or ultrasonic dispersion to ensure uniform distribution; and S5, testing the mechanical property, the interface bonding force and the dispersity of the modified carbon fiber powder. According to the invention, cleaning and drying of the carbon fiber powder, introduction and fixation of a nano material, surface treatment, mixing of a multifunctional modifier and performance testing are carried out in sequence, and the process can significantly improve the mechanical properties, interface bonding force and dispersibility of the carbon fibers.

The invention relates to the technical field of functional textile materials, in particular to a hollow heating fabric for winter gown warm keeping and a preparation process thereof.The hollow heating fabric comprises an inner layer, an outer layer and a middle layer, and a layer fiber solution is sprayed between the inner layer and the middle layer and between the outer layer and the middle layer; the preparation process comprises the steps of premixing, double-field coupling synergistic spinning, foaming, surface modification, construction of the microfluidic moisture-conducting layer and three-stage heat setting. According to the invention, the spraying design of the layer fiber solution can enhance the interlayer binding force of the hollow heating fabric, and the addition of the PCM microcapsule suspension and the TPU base material can form a core-sheath structure of the fabric, thereby significantly improving the mechanical properties of the fabric; the silane coupling agent is added, so that interface bonding among different materials can be enhanced; the energy consumption can be reduced and the attenuation performance of the fabric can be reduced by double-field coupling synergistic spinning auxiliary fabric forming; the three-stage heat setting can improve the dynamic environment adaptability of the fabric.

The invention relates to the technical field of carbon fiber surface modification, and discloses an amphiphilic carbon fiber and a preparation method thereof.The amphiphilic carbon fiber comprises a carbon fiber matrix, a hydrophilic functional group and a hydrophobic functional group, and the hydrophilic functional group and the hydrophobic functional group are modified on the surface of the carbon fiber matrix; the hydrophilic functional group is selected from one or more of an amino-substituted ionic liquid group, hydroxyl and carboxyl. The ionic liquid is electrochemically grafted, and the amphiphilic carbon fiber is formed by utilizing ion exchange reaction, so that the reaction efficiency can be effectively improved. The obtained amphiphilic carbon fiber and resin have good binding capacity, the water dispersion performance is improved, the performance expression of the carbon fiber is improved, and the application range is widened.

The invention belongs to the technical field of plastic woven bags, and particularly relates to a corrosion-resistant and fracture-resistant plastic woven bag which is prepared from the following raw materials: modified polypropylene particles, a silane coupling agent, modified lignin fiber powder, a corrosion-resistant agent, an antioxidant, a corrosion-resistant synergist, a lubricant and a flexibilizer. The preparation method comprises the following steps: S1, stirring the modified polypropylene particles, the silane coupling agent, the modified lignin fiber powder, the corrosion-resistant agent, the antioxidant, the corrosion-resistant synergist, the lubricant and the flexibilizer, then extruding, cutting into blank filaments, and drawing into flat filaments; s2, fixing the flat filament on a plasma processing device, and starting the plasma processing device to obtain a modified flat filament; and S3, the modified flat filaments are woven, and the corrosion-resistant and fracture-resistant plastic woven bag is obtained. The problems that in the prior art, woven bags are poor in interface compatibility, corrosive media are prone to permeating, and the fracture resistance is insufficient can be solved, and the mechanical property and the corrosion resistance of the polypropylene woven bag are remarkably improved.

The invention provides a vamp, insole and tongue preparation process which comprises the following steps: S1, weaving elastomer monofilaments or multifilaments into corresponding preformed samples according to the styles of vamps, tongues or insoles, S2, dipping the preformed samples in organic good solvents corresponding to the elastomer monofilaments or multifilaments for dipping pretreatment; s3, removing the redundant dipping solvent from the preformed sample subjected to dipping treatment in a flat plate extrusion form; s4, putting the dried preformed sample into a high-pressure kettle for supercritical foaming, and opening the high-pressure kettle to obtain a foamed fabric sample; the monofilament fineness is 0.1-1.0 mm, and the multifilament specification is 1 dtex to 2200 dtex. The invention also provides a product prepared by the preparation method. The obtained vamp, tongue and insole products have the characteristic of light weight, the air permeability, the heat retention property and the comfort are further improved, compared with the existing vamp, tongue and insole products, the production process is simplified, and the products with more diversified appearances and enhanced use performance are obtained.

This application relates to a carbon fiber, a composite material and a carbon fiber surface treatment method, belonging to the technical field of carbon fibers. A carbon fiber surface treatment method includes: sequentially subjecting the carbon fiber to an anodic oxidation treatment and a cleaning and drying treatment to obtain carbon fiber I; wherein, the current density of the anodic oxidation treatment is 3-5 mA / cm 2 ; immersing the carbon fiber I in an aqueous dopamine solution for reaction, and the dopamine undergoes a self-polymerization reaction during this process to coat the surface of the carbon fiber I, thereby obtaining the surface-treated carbon fiber; wherein, the mass fraction of the aqueous dopamine solution is 15-30%. Through this preparation method, after the dopamine undergoes a self-polymerization reaction on the fiber surface, rich active groups can be provided. In subsequent processes, the wetting effect of the resin on the fiber is significantly improved, thereby significantly enhancing the bonding ability between the fiber and the resin. The carbon fiber obtained by this method has a good bonding ability with the resin and a good tensile strength of the multifilament.