264 results about "Single fiber" patented technology

The invention discloses fiber-reinforced anti-crack concrete and a preparation method thereof, and relates to the technical field of building materials, the fiber-reinforced anti-crack concrete comprises the following raw material components: 310-450 parts of cement, 150-190 parts of water, 930-1200 parts of coarse aggregate, 630-800 parts of fine aggregate, 80-180 parts of mineral active admixture, 1.2-18 parts of multi-element composite fiber, 1.8-4.5 parts of polycarboxylic acid water reducer, and 20-35 parts of anti-crack synergistic system. Through a quaternary fiber system, a three-dimensional interlocking net-shaped crack-resistant framework is formed in concrete slurry, the problems that the single fiber reinforcement effect is limited, and the interface bonding force with a concrete matrix is insufficient are solved, and the crack resistance and the mechanical property of the concrete are improved.

The invention discloses a continuous fiber reinforced thermoplastic composite material and a preparation method thereof. The continuous fiber reinforced thermoplastic composite material comprises 35-40% of a polypropylene matrix with a melt index of 10-30 g / 10 min; 55% of continuous fibers are selected from glass fibers, carbon fibers or basalt fibers which are arranged in one direction, and the monofilament diameter is 9-15 microns; the intumescent flame retardant and the ammonium polyphosphate are compounded according to the mass ratio of 2: 1; 1-2% of an interface modifier, wherein a silane coupling agent KH-570 or PP-g-MAH is selected and used; the roughness Ra of the aluminum foil layer is 1.5-2.5 microns; under the condition of basically ensuring that the overall performance of the material is not greatly influenced, the application capability of the material is expanded, and the fireproof and flame-retardant capability of the material is improved, so that a thermoplastic composite material scheme can also be adopted under various harsh use conditions.

The invention provides a temperature, strain and acoustic emission measurement method and device based on a tilted fiber bragg grating. The method comprises the following steps: carrying out cladding mode and Ghost mode demodulation on a transmission spectrum of a tilted fiber grating to obtain cladding mode wavelength shift and Ghost mode wavelength shift; wherein the tilted fiber bragg grating is mounted on a target structure; the cladding mode wavelength shift and the Ghost mode wavelength shift are substituted into the two-parameter matrix and solved, and the temperature variation and the strain variation of the target structure are obtained; wherein the two-parameter matrix comprises cladding mode-temperature sensitivity, Ghost mode-temperature sensitivity, cladding mode-strain sensitivity and Ghost mode-strain sensitivity of the tilted fiber bragg grating; and the Bragg reflection spectrum of the tilted fiber grating is demodulated and analyzed to obtain an acoustic emission signal of the target structure. According to the invention, simultaneous measurement of temperature, strain and acoustic emission signals can be realized only by using a single fiber bragg grating.

The invention discloses a surface-enhanced Raman scattering probe as well as a preparation method and application thereof. The surface enhanced Raman scattering probe comprises a conductive fiber, a bismuth-based nanosheet growing on the surface of the conductive fiber in situ and noble metal nanoparticles growing on the surface of the bismuth-based nanosheet in situ. The preparation method of the surface enhanced Raman scattering probe comprises the following steps: 1) preparing a conductive fiber grid loaded with a bismuth-based compound; 2) preparing a conductive fiber grid on which bismuth-based nanosheets grow; 3) preparing a conductive fiber grid on which precious metal nanoparticles grow; and 4) disassembling the conductive fiber grid on which the noble metal nanoparticles grow into single fibers. The surface-enhanced Raman scattering probe has the advantages of large specific surface area, high detection sensitivity, good biocompatibility, economy, environmental protection, simple preparation method and the like, and is suitable for manufacturing a surface-enhanced Raman scattering substrate for surface-enhanced Raman spectrum detection.

The invention relates to the technical field of textile weaving, and discloses a multi-layer composite weaving method for worsted wool fabric, which comprises the following steps: preparing plush warp yarns, composite weft yarns and shaping warp yarns which are formed by blending various fibers; sequentially carrying out dyeing and sizing treatment on the yarns; a weaving machine is transformed to meet the multi-layer composite weaving requirement; applying the transformed weaving machine to implement multi-layer composite weaving, including warping, drafting and reed passing and weaving, and controlling corresponding process parameters; and carrying out on-line detection in the weaving process and quality detection on the woven gray fabric. The plush warp yarn, the composite weft yarn and the shaped warp yarn are formed by blending various fibers, the yarn performance is enriched, the plush warp yarn has the warm-keeping and soft characteristics, the composite weft yarn has the antibacterial and health-care functions, microorganism breeding is inhibited, the warm-keeping performance is improved, and human body microcirculation is promoted, and the shaped warp yarn enhances the strength and stiff and smooth degree. The overall quality of the worsted wool fabric is improved, and the market diversification requirements are met. The problem of performance limitation of a single fiber is solved.

The invention aims to provide a modified sepiolite fiber as well as a preparation method and a use method thereof, aiming at the defects of the performance and modification technology of the existing sepiolite fiber. The invention relates to a modified sepiolite fiber, which is a sepiolite fiber obtained by carrying out acid activation-microwave heating synergistic modification on a sepiolite raw ore, wherein the sepiolite fibers are single fibers and small bundle fibers; and the crystallinity of the sepiolite fiber is 75-88%. The sepiolite fiber is prepared by adopting an acid activation-microwave heating synergistic modification method, and through the synergistic treatment of hydrochloric acid and microwave heating, the microstructure and the specific surface area of the sepiolite fiber are effectively improved, so that the fiber distribution is more uniform, the activity of the sepiolite fiber is improved, and the application range of the sepiolite is expanded. And the concrete reinforced by the modified sepiolite fiber is better in mechanical property and has certain acid resistance.

The invention provides a moisture-absorbing and heating polar fleece fabric with high thermal insulation performance and a production process thereof, and relates to the technical field of garment fabrics. According to the moisture-absorbing and heat-emitting polar fleece fabric with the high heat preservation performance and the production technology of the moisture-absorbing and heat-emitting polar fleece fabric, blended yarn is composed of various functional fibers, and the functional fibers comprise, by weight, 25% of wool, 30% of self-heating acrylic fibers, 25% of lyocell fibers and 20% of nylon. According to the invention, the advantages of each fiber are fully played through the component design of the fixed-spinning yarn and the scientific proportion, the defect of a single fiber is overcome, secondly, the static control method effectively reduces the generation of static electricity through the synergistic effect of nylon and lyocell, and finally, the thermal insulation performance and the hand feeling of the fabric are remarkably improved through the application of the two-side napping polar fleece process.

The invention discloses a method for printing a two-dimensional structure of a thermosetting material with controllable surface roughness. The method comprises the following steps: regulating and controlling the rheological property of the extrusion behavior of the selected thermosetting material; calculating and determining the relationship between the deposition morphology of the thermosetting material and the printing parameters, and drawing an H-V phase diagram to determine a critical printing interval for realizing uniform deposition; establishing a single fiber deposition morphology evolution model and a multi-fiber fusion geometric evolution model, and providing a correlation corresponding relation for the fusion degree and the surface microscopic roughness of adjacent deposition fibers, so as to obtain a preset surface microstructure morphology; and according to the required surface roughness, the interface is cured and locked through thermocuring at different fusion stages, so that the thermoset material two-dimensional film with continuously adjustable roughness and a stable structure is obtained. According to the invention, two-dimensional structure printing of any thermosetting material system on any spreading substrate can be realized, and the surface roughness can be continuously and programmably adjusted.

The invention discloses a preparation method of an integrally-formed ceramic matrix composite hollow guide vane, the hollow guide vane comprises an upper margin plate, a vane body and a lower margin plate, a hollow guide vane preform is obtained by weaving carbon fibers or silicon carbide fibers, and the fiber interweaving density at the joint of the vane body and the lower margin plate is larger than that at other positions; the method comprises the following steps: preparing a mold based on a hollow guide blade preform, fastening and shaping to obtain a tool, impregnating, cracking and depositing a silicon carbide matrix through a precursor to fill pores among fiber bundles for a certain time, dismounting the tool, and continuously impregnating, cracking and depositing the silicon carbide matrix through the precursor; according to the manufacturing method, continuous and complete fibers at the junctions of the blade body and the upper and lower edge plates are achieved, matrix densification is achieved, the overall strength is effectively improved, the risks of cracking and gas leakage are reduced, tools do not need to be replaced in the manufacturing process, the manufacturing complexity can be greatly reduced, and the manufacturing cost is reduced. The processing period is shortened.

The invention belongs to the field of fiber materials, and provides a hollow acrylic fabric with thermal insulation performance and a preparation process thereof. The composite design of an acrylonitrile-based copolymer shell layer and an inner cavity silicon dioxide aerogel layer is adopted, a boric acid ester cross-linked network is formed through borax bath treatment to lock a three-dimensional crimp structure, and a hydrophobic modified silicon dioxide aerogel layer with the thickness of 50-200 nm is constructed in a fiber inner cavity; the mechanical-structural synergy that the single-fiber breaking strength is not lower than 3.5 cN / dtex under the condition that the hollowness degree is 30%-45% and the fiber dry-state crimp number is not smaller than 12 / 25 mm is achieved, the thermal resistance of the fabric reaches 0.065 m.K / W to 0.075 m.K / W, the air permeability is kept at 150 mm / s to 250 mm / s, and the fabric has the advantages of being good in air permeability, good in air permeability and the like. The contradiction between mechanical bearing and hollow structure design under the high-solid-content wet spinning fine denier condition, the contradiction between structural stability and fatigue durability of boric acid ester cross-linked three-dimensional curl after multiple times of water washing and the contradiction between low gram weight and high thermal resistance and the heat transfer mechanism of breathable comfort are solved, and the wide warm-keeping garment application value is achieved.

To provide a lightweight, three-dimensional warp-knitted fabric that offers cushioning and flexibility when folded, similar to soft polyurethane foam. [Solution] The three-dimensional warp knitted fabric according to this embodiment is a three-dimensional warp knitted fabric knitted with a three-reed. The three-dimensional warp knitted fabric consists of a face fabric structure, a backing fabric structure, and a connecting structure that connects the face fabric structure and the backing fabric structure. The connecting yarn constituting the connecting structure is a multifilament crimped yarn with a total fineness of 80 to 170 dtex and a single fiber fineness of 2 to 5 dtex. The connecting structure is a diagonal connecting structure or a truss connecting structure. The weight of the three-dimensional warp knitted fabric is 550 g / m 2 The following applies:

The invention discloses functional composite fiber supplement granules for sows in the perinatal period as well as a preparation method and application thereof, relates to the technical field of feeds, and solves the problems that a single fiber raw material is poor in effect and palatability and cannot accurately regulate and control intestinal health of the sows in the perinatal period. Comprising the following raw materials in percentage by weight: 30-60% of soluble fiber; 25%-45% of insoluble fibers; 5%-15% of an adhesive and energy agent; 9.2%-23% of a functional additive and 0.5%-1.5% of a lubricant And unavoidable impurities. By scientifically compounding a plurality of specific fiber sources and functional additives, the feed can achieve the following effects: (1) the constipation condition of the sows in the perinatal period can be obviously improved; (2) regulating the balance of intestinal flora, inhibiting inflammation and enhancing the oxidation resistance of the body; (3) the feed intake of the sows in the perinatal period is increased, and postpartum recovery and lactation performance are promoted.

A colored optical fiber comprises a bare optical fiber, a primary layer formed of a first ultraviolet curing resin covering the bare optical fiber, and a secondary layer formed of a second ultraviolet curing resin covering the primary layer, wherein a Young's modulus of the primary layer is smaller than 70% with respect to a saturated Young's modulus of the primary layer, and wherein the saturated Young's modulus of the primary layer is smaller than or equal to 0.85 MPa.

The application belongs to the field of smart fibers and flexible electronics, and relates to an integrated circuit fiber and a preparation method thereof. The fiber contains electronic components integrated in a single fiber, and the electronic components are composed of multiple functional layers serving as components of the fiber and extending along the axial direction of the fiber. The integrated circuit fiber includes two types of integration schemes: one is a two-dimensional grid structure of multiple electronic components arranged radially side by side, and the electronic components can be electrically interconnected or isolated; the other is a radial stacking structure of a single electronic component, which can be adapted to five types of functional units, including electroluminescence, resistance-capacitance processing, capacitance sensing, transistors and organic electrochemical diodes. The preparation method comprises the following steps: a multi-channel microfluidic chip is used, multiple spinning solutions are injected into different channels, the spinning solutions in some channels are periodically turned on and off, the flow rates of the channels are independently controlled, the solutions are combined to form a multi-layer laminar flow structure, and the product is obtained through solidification in a coagulation bath, cleaning and drying. The application realizes high-density and high-stability functional integration in a single fiber.

The technologies described herein are generally directed to using a loopback component to test a single fiber optic strand. For example, a method described herein can include generating a first optical beam of a first wavelength. The method can further include transmitting the first optical beam via a fiber optic fiber. Further, the method can include receiving via the fiber optic fiber, a second optical beam of a second wavelength, with the second optical beam having a characteristic of the first optical beam, and with the second optical beam being generated by a non-electrical conversion of the first light of the first wavelength to the second light of the second wavelength.

The utility model discloses a BOX and coaxial TO hybrid packaged single-fiber three-transmitting and three-receiving optical device, which comprises a wave separator, an optical combination assembly is arranged behind the wave separator, an optical fiber adapter is arranged in front of the wave separator, and the optical combination assembly, the wave separator and the optical fiber adapter are positioned on the same straight line optical path; the wave separator comprises three filters, namely a first filter, a second filter and a third filter, which are arranged at intervals along the direction of a linear light path, and the three filters are obliquely arranged at any angle of 8-45 degrees; light emitted from the optical fiber adapter is sequentially reflected by three filters in the wave separator to be divided into three paths of collimated light beams, and the three paths of collimated light beams are perpendicular to a linear light path and are emitted to each receiving detector; through the structural form of wave plate combination, the cost is reduced, the port integration density is improved, three-transmitting and three-receiving of the coaxial single fiber is realized, the product reliability is effectively improved, the product reliability is ensured, and the optimal performance and cost are achieved.

The application discloses polyester staple fiber for sewing thread and a preparation method thereof. The polyester staple fiber has the following aggregation morphology: the number of crimps is 8-20 per 25 mm, the ratio of the crimp degree to the number of crimps CI / CN is 0.70-1.25, the crimp morphology of the single fiber has the morphology characteristics that the crimp wave peak width is large, and the wave peak arrangement is loose and not close, the crimp wave peak includes a type of wave peak and b type of wave peak, the width w of the a type of wave peak is 2.6-6.0 mm, the width w of the b type of wave peak is 0-2.5 mm, the proportion of the a type of wave peak is 70-100%, and the rest is the b type of wave peak; the mass index of the above fiber meets the physical performance mass index of the existing product, and simultaneously has the characteristics of high carding passability and high fiber strength utilization rate; the fiber can improve the spinnability before the production of the polyester sewing thread, and simultaneously improve the fiber strength utilization rate, and the strength utilization coefficient is increased by 5.0-17.6% compared with the previous one.

The utility model discloses a batching device for processing silk-like cotton, which is characterized in that a plurality of independent pretreatment components are arranged to respectively open different fiber raw materials and add auxiliaries, then the fiber raw materials are conveyed to a batching component through a first spiral conveyor to be intensively weighed, and finally the fiber raw materials are conveyed to a mixing machine through a second spiral conveyor. The whole process is automatically coordinated by a control system, a traditional manual batching mode is replaced, a driving licker-in and a driven licker-in which are in meshing transmission through a driving gear and a driven gear are adopted in a pretreatment assembly, it is ensured that the two licker-in rotate in the forced, synchronous and opposite directions, caked fibers can be efficiently and softly torn and carded to be in a fluffy single-fiber state, and the quality of the caked fibers is improved. The conveying pipe with the nozzle and the pump body are arranged in the treatment box, so that auxiliaries such as an antistatic agent can be uniformly sprayed on the surfaces of fibers in an atomized form while the fibers are opened, the problems of flying and adhesion of the fibers caused by static electricity are solved, the toughness of the fibers is improved, and fracture damage in subsequent processing is reduced.

The application provides a tooth-shaped functional composite fiber multiple combination mold, which is characterized by comprising a spinneret A and a spinning unit, the spinneret A and the spinning unit are connected, and a plurality of buffer grooves A are sequentially arranged on the surface of the spinneret A from inside to outside; the tooth-shaped structure is formed, the structure is more reasonable, a plurality of functional materials can be filled, the effect that a single fiber has multiple functions is realized, that is, 1 is used as an intermediate carrier material, N functional materials are added to the edge tooth-shaped structure, thereby forming a 1+N structure and achieving a 1+N effect.

Provided is an artificial leather that achieves both a soft texture and excellent durability, and a method for manufacturing the same, the leather comprising: a fibrous base material formed from superfine fibers having an average single fiber diameter of 0.1-10 μm; and a polymeric elastic body, where the polymer elastic body comprises a compound having a hydrophilic group and a compound having an ethylene oxide skeleton, the content of the compound in the polymeric elastic body of the artificial leather being 0.1-5 parts by mass per 100 parts by mass of the polymeric elastic body.

A cigarette filter that reduces harmful smoke components is disclosed. In one view, the present invention provides a cigarette filter comprising a paper sheet, wherein the paper sheet comprises pulp fibers and chitosan fibers, and the pulp fibers comprise at least one of single fibers and mixed fibers having an average coarseness of 13 mg / 100 m or more.

The invention relates to the technical field of building materials, and discloses a reinforced polypropylene spiral fiber which is of a continuous spiral structure and is made of a modified polypropylene material. The diameter of the fiber ranges from 0.2 mm to 0.4 mm, the length of the fiber ranges from 15 mm to 40 mm, the spiral pitch of the fiber ranges from 3 mm to 8 mm, and the number of spiral turns of a single fiber ranges from 2 to 5. According to the reinforced polypropylene spiral fiber and the preparation method and application thereof, the spiral structure greatly increases the contact area and bond stress of the fiber and concrete, the dispersity of the fiber in the concrete is remarkably improved, the reduction rate of the anti-cracking area of the concrete is larger than or equal to 60%, the 28-day breaking strength is larger than or equal to 8.0 MPa, shrinkage cracks and temperature cracks of the concrete in a water environment are effectively inhibited, and the service life of the concrete is prolonged. And the structural toughness and the bearing capacity are greatly improved.

A system and method for measuring pressure inside a pipeline or pressure vessel is disclosed. The system includes one or more units locatable around an external surface of the pipeline or vessel, each unit containing: a light source for generating a light beam; a single fiber Mach Zehnder interferometer (SF-MZI) sensor bendable against an outer surface of the pipeline or vessel, for receiving the light beam; a light receiver for receiving the light bean from an output of the SF-MZI sensor, said light receiver including an optical spectral analyzer; and a local processor for signal conversion; a data acquisition system associated with each of the one or more units to provide power to the elements of the unit; and a central processor in communication with each of the local processors of each of the units, said central processor containing stored strain data, and the stored bend induced birefringence data.

A multi-core fiber coupler based on single-clad optical fibers (1), and a taper ratio design method therefor. Each single-clad optical fiber (1) comprises a fiber core (13), a cladding (12), and a coating layer (11), arranged in sequence from inside to outside. The multi-core fiber coupler based on single-clad optical fibers (1) comprises single-clad optical fibers (1) and a sleeve (2). Several single-clad optical fibers (1) are nested within the sleeve (2), and the total number of the single-clad optical fibers (1) is equal to the total number of fiber cores in a target multi-core optical fiber (3). One end of the sleeve (2) is tapered, and the other end is not tapered. A mode field diameter of each single-clad optical fiber (1) at the non-tapered end of the sleeve (2) matches a mode field diameter of a single fiber core of the target multi-core optical fiber (3). The single-clad optical fibers (1) and the multi-core fiber coupler have the advantages of low fabrication difficulty, low cost, and the capability of achieving low-loss connection with multi-core optical fibers and standard single-mode optical fibers.

The application relates to the technical field of fiber reinforced cement-based composite materials, and discloses a PVA fiber oil coating method oriented by fiber-gel material adhesion, which comprises the following steps: determining a target interface adhesion performance grade between polyvinyl alcohol fibers and gel materials; according to the target interface adhesion performance grade, an oil coating liquid is prepared; dry polyvinyl alcohol fibers are immersed in the prepared oil coating liquid, and the polyvinyl alcohol fibers absorb the prepared oil coating liquid; the polyvinyl alcohol fibers absorbing the oil coating liquid are subjected to spin-drying treatment; and the spin-dried polyvinyl alcohol fibers are subjected to heat curing treatment, so that a continuous, uniform and non-peeling coating film layer is formed on the surface of the polyvinyl alcohol fibers. By establishing a five-grade adhesion performance grading system based on a single fiber tensile test and correlating the five-grade adhesion performance grading system with macroscopic tensile performance and crack behavior of concrete, the problem that adhesion performance regulation lacks systematicness and quantitative basis in the prior art is solved.

The invention relates to a preparation method and application of a cobalt / nitrogen co-doped multi-section nano-chain carbon fiber oxygen electrode, and the preparation method comprises the following steps: (1) dissolving an organic ligand and a cobalt salt in an organic solvent, uniformly stirring and standing, and then centrifuging, washing and drying to obtain ZIF-67 powder; (2) dissolving a high-molecular polymer and ZIF-67 powder in a solvent, and uniformly stirring to obtain an electrostatic spinning solution; (3) performing electrostatic spinning on the electrostatic spinning solution to obtain a fiber membrane; and (4) pre-oxidizing the fiber membrane at a medium-low temperature in an air atmosphere, and then transferring the fiber membrane to a nitrogen atmosphere for high-temperature calcination to obtain the cobalt / nitrogen co-doped multi-section nano-chain carbon fiber oxygen electrode. According to the invention, the distance of the ZIF-67 cluster on the single fiber is accurately controlled, the electron transmission path and the active site distribution are optimized, the breakthrough of the bifunctional catalytic performance is realized, and the application prospect is good.

The application provides an emulsified fiber asphalt anti-sloughing plugging agent and a preparation method. The emulsified fiber asphalt anti-sloughing plugging agent is prepared by mixing emulsified asphalt, MMH positive glue and basalt fiber powder. The basalt fiber powder is distributed in a three-dimensional random pattern in the emulsified asphalt anti-sloughing plugging agent, which can enhance the strength of the asphalt plugging layer. The single fiber diameter of the basalt fiber powder is consistent with the average crack distribution of most shale formations, and the basalt fiber powder has good compatibility, which enhances the adhesion between the plugging layer and the formation after the emulsified asphalt is demulsified, and improves the anti-sloughing plugging effect. The MMH positive glue improves the stability of the whole system due to its own characteristics, and is beneficial to the adsorption, demulsification and patching of the emulsified asphalt and the formation with negative charge. The emulsified fiber asphalt anti-sloughing plugging agent enhances the strength of the plugging layer after the emulsified asphalt is demulsified, and improves the adhesion between the plugging layer and the formation, and improves the anti-sloughing plugging effect. In addition, the preparation process is simple, the cost is low, and the emulsified fiber asphalt anti-sloughing plugging agent has a high application prospect in the field of wellbore anti-sloughing plugging.

An optical transmitter can generate probabilistically shaped quadrature amplitude modulation (PS-QAM) signaling for transmission over a fiber to a destination without optical amplification. The single fiber can transmit the PS-QAM signaling using dense wavelength division multiplexing having a relatively large number of channels that are closely spaced. A coherent receiver can receive the PS-QAM signaling for decoding without implementing chromatic dispersion compensation.

This invention relates to a silicon carbide ceramic matrix composite material reinforced with unidirectional silicon carbide fibers and its preparation method, comprising: 1) winding silicon carbide fibers in the same direction to obtain a unidirectional tape; 2) depositing an interface phase on the surface of a single fiber using chemical vapor deposition; 3) preparing a prepreg slurry by mixing carbon powder, dispersant, etc.; 4) impregnating the unidirectional tape with the slurry to obtain a prepreg tape; 5) layering the prepreg tape and the unimpregnated unidirectional tape at a layer ratio of 1:1 to 16:1 and a silicon carbide fiber angle of 0° to 90°; 6) obtaining the composite material through curing, pyrolysis, and melt infiltration densification. This invention breaks away from the traditional single-layer layup mode, constructing a continuous gas flow path through mixed layering, guiding process gas generation, solving the drawbacks of high porosity and matrix cracking, optimizing the material's stress state, and obtaining a composite material with both low density and high compactness, excellent mechanical properties at room temperature and high temperature, and excellent oxidation stability, shortening the preparation cycle, and meeting extreme service requirements.