793 results about "Fiber structure" patented technology

The invention discloses a mixed gas-imitating gel fiber as well as a preparation method and application thereof, and belongs to the technical field of fiber materials. The mixed gas-imitating gel fiber is prepared from the following components: cellulose dispersion liquid, a silane coupling agent and viscose in a mass ratio of (1-3): (0.2-0.8): (5-10), comprising the following steps: adding sodium hydroxide into a cellulose dispersion liquid, adjusting the pH value to be alkaline, adding viscose and a silane coupling agent, and carrying out ultrasonic stirring to prepare a mixed spinning solution; the mixed spinning solution is extruded into a coagulating bath through a wet spinning device to be drafted, wet fibers are obtained, and the mixed gas-imitating gel fibers are obtained after freeze drying. The aerogel fiber disclosed by the invention has low heat conductivity coefficient, high mechanical strength and extreme temperature resistance, can solve the problem that the densification and porosity of a traditional fiber structure are difficult to balance, and effectively expands the application prospect of the aerogel fiber in the fields of cold protection, warm keeping and the like.

The invention provides an activated carbon fiber capable of efficiently removing formaldehyde and a preparation method thereof, the activated carbon fiber is of a composite material fiber structure of porous TiO2 derived from activated carbon and a metal organic framework (MOF), and the preparation method of the composite material comprises pretreatment of activated carbon, preparation of a Ti-MOF precursor and preparation of TiO2 / activated carbon fiber. According to the invention, the MOF-derived porous TiO2 / activated carbon composite fiber structure is constructed, physical adsorption and photocatalytic degradation functions are cooperated, and the limitation of single adsorption capacity is broken through; the interface bonding problem of the MOF derivative and the activated carbon is solved, and high-dispersion loading and stable and firm compounding of the active components are realized; a process path capable of realizing large-scale preparation is provided, and continuous production of the composite fiber is realized through an electrostatic spinning technology.

To provide a cation-dyeable polyester fiber structure, a production method of the same, and a uniform for medical use.SOLUTION: A cation-dyeable polyester fiber structure includes a cationic dye, a quinoline compound, and an ultraviolet absorber, where 0.03 mass% or more and 0.80 mass% or less of the quinoline compound is included to a mass of the cation-dyeable polyester fiber structure, a color difference ΔE between before and after irradiating the cation-dyeable polyester fiber structure with ultraviolet carbon arc lamplight is 2.0 or lower, and an antibacterial activity value A50 after 50 times of high temperature acceleration washing is larger than a standard cloth growth value F in an antibacterial evaluation method described in an SEK mark textile product certification standard.SELECTED DRAWING: None

The invention provides an on-line automatic test method for the compressive capacity of a corrugated carton, and belongs to the technical field of corrugated carton production. A micro-deformation loading system is constructed to apply a test load which does not exceed 10% of the expected maximum bearing capacity, and a laser displacement sensor array is adopted to measure micro-deformation displacement data of six surfaces of the carton; and synchronously acquiring acoustic emission signals and extracting spectrum characteristic parameters. Micro-deformation data is analyzed based on a carton fiber structure physical mechanism model, stress field distribution is calculated, analysis is carried out in combination with a hierarchical attention carton strength evaluation model, a rigidity coefficient is calculated and compared with a reference threshold value, a structural weak area is identified through a strain energy distribution diagram, and a damage risk index is quantified. And comprehensively evaluating the compressive strength prediction value and the confidence interval of the corrugated carton, and outputting a prediction result, thereby realizing accurate evaluation of the compressive strength of the corrugated carton under a non-destructive condition.

The invention belongs to the field of macromolecules, and particularly relates to a PBO fiber surface modification method for a synergistic copolymer coating through plasma treatment. According to the method, modification is designed by adopting a synergistic mechanism of plasma treatment and a functional coating: firstly, the PBO fiber is treated by oxygen plasma, a microstructure and an active group are formed on the surface of the PBO fiber, and the surface activity of the PBO fiber is rapidly improved; then coating a monomer solution containing a photoinitiator, exciting light to initiate free radical polymerization through ultraviolet irradiation, forming a random copolymer coating on the surface of the PBO fiber, and repairing the damage of oxygen plasmas to the PBO fiber structure while introducing active groups into the coating; and active groups formed by oxygen plasma treatment can enhance the adhesive force between the coating and the PBO fiber. Finally, the invention provides an environment-friendly and controllable PBO fiber surface synergistic modification technology, the intrinsic performance of the PBO fiber and the interface bonding strength are improved for a long time, and a support is provided for engineering application of the high-performance PBO fiber.

The invention discloses an optical fiber three-dimensional shape sensor based on an optical frequency domain reflection technology and an application method of the optical fiber three-dimensional shape sensor, the optical fiber three-dimensional shape sensor comprises a base material and more than three optical fibers, and all the optical fibers are spirally wound and fixed on the surface of the base material at equal intervals and constant screw pitches to form distributed sensing units; according to the application method, measurement signals of all the optical fibers are obtained, and axial strain and strain are calculated; calculating the total curvature vector of the reconstruction curve of the measured object; calculating a bending direction angle and a curvature of the reconstruction curve of the measured object; performing differential calculation on the bending direction angle to obtain the torsion rate of the reconstructed curve of the measured object; and reconstructing the three-dimensional shape of the measured object according to the curvature and the torsion of the reconstructed curve of the measured object. The invention aims to realize synchronous measurement of bending, torsion and axial strain by using a distributed sensing unit formed by a multi-fiber structure which is spirally wound at the same interval and at a constant screw pitch.

The invention discloses a preparation method of a bionic cornea stroma lens for refractive correction, which comprises the following steps: solution preparation: dissolving type I collagen in an acetic acid solution, adding a film aid, fully stirring, and centrifugally defoaming to obtain a type I collagen composite solution; the I-type collagen composite solution is poured into an assembling groove, the curvature radius of titanium metal is set to be 6.8-8.0 mm, the titanium metal serves as a working electrode material, platinum metal serves as a counter electrode material, current parameters are set according to the needed thickness of the lens blank, the density is 3.50-6.50 mA / cm < 2 >, and the thickness of the lens blank is set to be 3.50-6.50 mA / cm < 2 >; a high-transparency cornea embryo material which is uniform in curvature in all directions and similar to human cornea fiber structure arrangement is formed after electrochemical assembly and cross-linking curing, accurate cutting machining is carried out through excimer laser, a concave / convex matrix lens with the needed correction degree is obtained, the correction precision is high after cornea interlayer implantation, and the correction precision is high. And meanwhile, the compound has excellent performance in the aspects of in-vivo stability and biological safety.

To provide a fiber structure suitable for a wear for healthcare and nursing care workers in which inferior light resistance and heat resistance which are intrinsic to cationic dyeable polyester fiber dyed with a cationic dye are simultaneously overcome, and a method for manufacturing the fiber structure.SOLUTION: A fiber structure containing cationic dyeable polyester fiber dyed with a cationic dye contains a benzotriazole-based compound by 0.50 mass% to 3.50 mass% based on the mass of the fiber structure, and contains a zinc pyrithione-based compound by 0.05 mass% to 0.20 mass% based on the mass of the fiber structure.SELECTED DRAWING: None

The invention discloses a fireproof cloak with an aerogel composite multi-layer structure, and belongs to the technical field of fireproof cloaks. Comprising an outer layer, a middle layer and an inner layer, wherein the outer layer is made of carbon fiber cloth; the middle layer is made of modified aerogel; and the inner layer is made of breathable flame-retardant cloth. According to the prepared cloak, the outer layer is the carbon fiber cloth, the carbon fiber structure is stable, middle-layer aerogel can be protected, external mechanical damage can be borne, the mass is light, and the wearing burden is reduced; the middle layer of the prepared cloak is the modified aerogel, so that the cloak is endowed with excellent heat insulation property and fire resistance; the inner layer of the prepared cloak is the aramid staple fiber needle-punched cloth, so that the cloak has the fireproof performance and also has certain wearing comfort; in conclusion, through the three-layer composite design of the carbon fiber outer layer, the modified aerogel middle layer and the aramid fiber inner layer, the composite material has the advantages of being ultra-light, high in fireproof performance and high in comfort and has important application value in the technical field of fireproof cloaks.

The invention discloses an all-fiber vortex interference system and a phase variation measurement method, belongs to the field of optical precision instrument design and test, and aims to realize ultrahigh-precision phase variation measurement by using an all-fiber structure. The vortex interference system comprises a light source module, an optical fiber beam splitting module, an optical fiber sensing module, an optical fiber mode conversion module, an optical fiber mode interference module and an imaging module in sequence along an optical path. The phase variation measurement method is a phase variation demodulation method based on angular Fourier transform, which is provided for the all-fiber vortex interference system. The interferometer provided by the invention does not need a complicated light path alignment step of a traditional interferometer, and the sensitivity of the all-fiber vortex interferometer is further improved.

The invention discloses a preparation process of fiber aramid fiber with high electromagnetic shielding performance, which comprises the following steps: step 1, dissolving an aramid fiber polymer in concentrated sulfuric acid to form a spinning solution; step 2, adding a nano conductive material and a magnetic material into the spinning stock solution, and treating the mixed solution by adopting an ultrasonic-high-speed shearing synergistic dispersion technology for 30-60 minutes; step 3, extruding the mixed solution into a coagulating bath through a wet spinning process, and performing multi-stage stretching, washing and drying to obtain nascent fibers; 4, performing high-temperature heat treatment and plasma surface modification on the nascent fiber to enhance the continuity of the conductive network; and step 5, coating the surface of the fiber with a polydopamine-metal composite layer. The invention belongs to the technical field of high-performance fiber preparation, and particularly provides a preparation process of fiber aramid fiber with high electromagnetic shielding performance, which optimizes filler selection, a dispersion process and fiber structure design, is high in electromagnetic shielding effectiveness, is suitable for a lightweight environment, and is high in environmental adaptability.

The invention relates to the field of needle coke production, and discloses needle coke as well as a preparation method and application thereof. The strength of the needle coke is 25-34%; the thermal expansion coefficient of the needle coke is 0.8 * 10 <-6 > / DEG C to 1.2 * 10 <-6 > / DEG C; in the microstructure of the needle coke, the content of the mosaic structure is 0.1%-10%; the content of the small sheet structures is 10%-30%; the content of the large sheet structure is 15-40%; the content of the fine fiber structure is 10%-45%; and the content of the crude fiber structure is 10-45%. The needle coke provided by the invention has better optical structure, thermal expansion coefficient and strength, and is suitable for producing large-diameter and ultrahigh-power graphite electrodes and graphite electrode joints.

The invention relates to a bionic meniscus 3D printing method and system, and the method comprises the steps: reading a meniscus STL model, carrying out the data preprocessing of the data of the model, and carrying out the construction to obtain a concave envelope contour; performing offset processing and four-curve segmentation to generate an elliptic equation fiber field; establishing a bidirectional mapping relation between a parameter space of an elliptic equation fiber field and a meniscus physical space based on an RBF mapping theory; based on a meniscus fiber density gradient change theory, performing simulation in a parameter space of the elliptic equation fiber field to obtain a bionic gradient fiber field; according to the meniscus STL model, the bidirectional mapping relation and the bionic gradient fiber field, fiber path coordinates of a meniscus physical space are obtained, and a 3D printing path is generated; and printing according to the 3D printing path to obtain the bionic meniscus. Precise simulation of a natural meniscus complex fiber structure is achieved through mathematical modeling, and the technical problems that in the prior art, fiber field control precision is insufficient, and regional characteristics are difficult to achieve are solved.

The device comprises a furnace body and a conveying system, the furnace body comprises a tunnel kiln type gas isolation bin section A, a pyrolysis section, a gas isolation bin section B, an oxidation section and a cooling section which are sequentially arranged, and mechanical sealing is achieved between the gas isolation bin section A, the pyrolysis section, the gas isolation bin section B, the oxidation section and the cooling section; the conveying system comprises a transfer trolley A and a transfer trolley B which are located at the two ends of the furnace body, a rotary line is arranged above the conveying system, a pull-push device B is arranged on the transfer trolley A, a pull-push device C is arranged on the transfer trolley B, a trolley is arranged below the rotary line, and the trolley is connected with a pull-push device D; the defect that a conventional combustion device cannot treat large-size raw materials is overcome, the fan blade crushing process is avoided, the fiber structure is protected, and the quality of recycled fibers is high; a pull-push structure is designed, the staying time of the materials in the furnace is controlled by controlling the rhythm of the push-in trolley, sufficient pyrolysis and oxidation of the materials are ensured, self-heating recycling is achieved through the combined pipeline, fuel consumption is low, and environmental protection is facilitated.

The invention discloses a glass fiber fabric with an electric heating function and a preparation method, and belongs to the technical field of functional fabric materials. The method comprises the following steps: adding a graphene precursor polymer into an organic solvent, and carrying out stirring and ultrasonic treatment to obtain a graphene precursor polymer solution; the preparation method comprises the following steps: dipping and drying a glass fiber fabric in a graphene precursor polymer solution, coating the surface of the glass fiber fabric with a graphene precursor polymer layer, repeatedly dipping and drying for multiple times, and curing to obtain the glass fiber fabric with the graphene precursor polymer layer; and pasting the glass fiber fabric with the graphene precursor polymer layer on a flat plate material, performing laser direct writing in an air environment according to a preset pattern path, and synchronously performing graphene treatment and patterning treatment on the graphene precursor polymer to prepare the glass fiber fabric with the electric heating function. The preparation process is simple and is compatible with construction of the conductive graphene layer with glass fiber structural characteristics, and the LIG technology can be used for in-situ generation of graphene on the surface of the glass fiber fabric, so that a flexible glass fiber fabric material with an electric heating function is obtained.

The invention discloses an all-fiber structure pulse laser based on a superfine single-crystal fiber and a preparation method thereof. The all-fiber structure pulse laser comprises a gain single-crystal fiber and a pulse modulation single-crystal fiber, and the gain single-crystal fiber and the pulse modulation single-crystal fiber form a superfine single-crystal fiber heterogeneous bonding structure through thermocompression bonding; the gain single-crystal optical fiber serves as a laser gain medium, the pulse modulation single-crystal optical fiber serves as a saturable absorber, the gain single-crystal optical fiber is provided with a high-reflection grating, the high-reflection grating and an oblique-angle low-reflection end arranged at the tail end of the pulse modulation single-crystal optical fiber form a resonant cavity, and pump light is input into the gain single-crystal optical fiber and enters the resonant cavity through the high-reflection grating. And the oblique-angle low-reflection end outputs pulse laser. The gain section and the modulation section are fused into an integrated structure through the superfine single crystal optical fiber bonding technology, the high-reflection grating is inscribed through the femtosecond laser direct writing technology, low-reflection-mirror oblique angle processing is carried out at the output end, space coupling loss is eliminated, and all-optical-fiber monolithic integration is achieved.

An objective of the present invention is to provide a conductive fiber which not only has excellent tensile strength, bending durability and corrosion resistance, but also in which the conductive fiber does not become magnetized and create a magnetic field disturbance, generate heat due to the magnetic field, attract iron powder, and the like. Another objective is to provide a fiber structure that includes the conductive fiber of the present invention and that has excellent flexibility.　The present invention relates to: a conductive fiber (1) including a liquid crystal polyester fiber (10) having a tensile strength of 18 cN / dtex or greater and a metallic foil (20) with a relative permeability of less than 3 spirally wound around the liquid crystal polyester fiber (10); and a fiber structure including the conductive fiber (1).

The invention discloses an aerospace electromagnetic shielding material based on modified polytetrafluoroethylene and a preparation method, and belongs to the technical field of nano materials. The method comprises the following steps: by taking polytetrafluoroethylene dispersion resin as a matrix, adding an extrusion aid and carbon nanotubes, stirring, curing, pre-pressing to form a green body, pushing and calendering to prepare a base film, and drying, stretching and mechanically splitting to form a microfiber layer; meanwhile, the polytetrafluoroethylene, the conductive filaments and the conductive reinforcing agent are twisted to prepare a twisted layer; the microfiber layer serves as an outer layer, the twisted layer serves as an inner layer, an electromagnetic shielding layer is woven, finally, the electromagnetic shielding layer is soaked in shielding liquid, dried and subjected to hot press forming, and the electromagnetic shielding material is prepared. According to the material, by constructing a continuous conductive network, excellent electromagnetic shielding effectiveness and low resistance are achieved, and the requirements for light weight, high conductivity and electromagnetic interference resistance in the aerospace field are met. The process parameters are strictly controlled, it is ensured that the fiber structure and the conductivity are optimized, and the method is suitable for electromagnetic protection in the extreme environment.

The invention discloses a continuous fiber structural part comprising an embedded connecting piece and a manufacturing method of the continuous fiber structural part, and belongs to the technical field of additive manufacturing. A plurality of embedded parts and locking bolts are arranged in the fiber structural part; through holes are formed in the embedded parts, the outer end faces of the through holes are flush with one end of the fiber structural part, the locking bolts are inserted into the through holes from the inner end faces of the through holes, and one locking bolt is in threaded connection with one embedded part; according to the structure, the connecting piece for additive manufacturing is pre-buried in the continuous fiber additive manufacturing forming printing process, meanwhile, the reverse locking bolt is installed to conduct fiber coating on the connecting piece, the mechanical property of connection between the pre-buried connecting piece and a component is improved, and meanwhile, the mechanical connection mode of a traditional composite material structural piece is replaced.

The invention discloses a high-temperature strain film sensor for detecting thermal stress of a small square billet crystallizer, and relates to the technical field of sensors, the high-temperature strain film sensor comprises a composite system formed by fiber structures, the fiber structures are interwoven and interspersed, and the composite system sequentially comprises a substrate layer, a high-temperature insulating layer, a piezoelectric film layer and a multifunctional composite layer from bottom to top; a channel is arranged in the piezoelectric film layer, the channel penetrates to the high-temperature insulating layer and the multifunctional composite layer, and the channel is connected with external equipment through a lead electrode. The multifunctional composite layer comprises a thermocouple array and a sensitive grid unit which are distributed in parallel and interwoven, and the thermocouple array is used for superposing the thermoelectric effect and increasing the output situation; the sensitive grid unit is used for converting strain of the crystallizer steel pipe into electric signals through sensitive grid deformation and outputting the electric signals, and real-time measurement of stress and strain on the surface or in the crystallizer is achieved. The sensor designed by the invention is good in high temperature resistance, good in structural stability, long in service life and high in measurement precision.

The invention discloses a dual-wavelength mode-locked laser generating device and a dual-wavelength mode-locked laser generating method, and belongs to the technical field of optical communication, and the dual-wavelength mode-locked laser generating device comprises a pumping source, an optical integration module, a gain optical fiber, a saturable absorber and a dual-wavelength pulse independent polarization mode linear coupling regulation and control structure, linear coupling strength of cross-polarization components in two wavelength pulses is independently regulated and controlled by using a structure of a polarization controller and a polarization maintaining optical fiber, and dual-wavelength mode-locked pulse laser of different types of pulse combinations can be obtained. The coherent pulse light source with unique spectral characteristics can provide a low-cost light source for the fields of high repetition frequency optical combs, all-fiber architecture high repetition frequency soliton sequences and microwave photonics.

This invention introduces a suspended telecommunications system utilizing gas-lift hydrogen-filled balloons for global internet access and secure encrypted communication analysis. Utilizing this gas-lift technology, it deploys an airborne antenna platform stabilized by lightweight carbon fiber structures and secured by ground-based cables. The system integrates various antennas, including parabolic and Starlink dishes, dynamically adjusting for optimal signal reception from terrestrial and satellite sources. a high-frequency amplifier-dissipator and an AI-enhanced ground processing center facilitate the interception and decryption of encrypted communications, filtering potential security threats. The platform features motorized rotating plates, efficient power management, and GSM / Wi-Fi modules for enhanced connectivity. Constructed with composite materials for durability and minimal weight, it includes built-in lighting for visibility and emergency signaling. The system presents an innovative, cost-effective, and scalable solution for global telecommunication coverage and secure communication monitoring, addressing national and social security concerns while ensuring reliable access to digital information worldwide.

The invention discloses a preparation method of a modified attapulgite-polytetrafluoroethylene composite material. The LDHs are loaded on the surface of ATP through a coprecipitation method, and a PTFE matrix is synergistically enhanced through the hydrogen-bond interaction of the LDHs and the fiber structure of ATP. The tensile strength of the obtained composite material reaches 35.2 MPa, the friction coefficient is as low as 0.174, the wear rate is only 1 / 116 of that of pure PTFE, and the composite material is suitable for the high-wear-resistance fields of mechanical sealing, aerospace and the like. The method is simple in process and low in cost, and has remarkable industrial value.

The invention discloses a high-fluidity GMT process suitable for integrated use of mold pressing and injection molding, which comprises the following steps: constructing a gradient reinforced fiber structure, depositing a nano graphene or carbon nanotube layer on the surface of glass fiber through a supercritical fluid auxiliary spraying technology to form a micro-scale interface reinforced structure, gradient arrangement is formed in the glass fiber bundle by further adopting an electromagnetic field orientation technology, so that the bonding strength between fibers and the overall flowability are improved, and a low-molecular-weight block copolymer with a reversible cross-linked structure is introduced into thermoplastic matrix resin. Therefore, the problems that traditional GMT filling is uneven and mold pressing-injection molding combination is poor are solved by improving resin fluidity and fiber dispersity, the interface bonding strength is improved through the intelligent temperature control and interface mutual dissolution technology, the layering phenomenon is avoided, the surface performance is optimized through plasma postprocessing, the comprehensive performance of a product is improved, and the product quality is improved. The method is suitable for high-requirement application fields such as automobiles, aerospace and the like.

The invention provides a temperature and pressure optical fiber sensor based on MZ interference and FP interference and a preparation method and a sensitivity measurement method thereof, the temperature and pressure optical fiber sensor comprises an 8-shaped optical fiber structure and a Bragg grating optical fiber structure, and the optical fiber structures are cascaded to form an MZ-FP mixed interference structure. And simultaneous high-precision measurement of the temperature and the pressure is realized. On the basis of a traditional balloon-shaped MZ interference structure, the 8-shaped optical fiber structure is designed to be used for achieving MZ interference, the structure can better excite optical signals, therefore, MZ interference with the better effect is achieved, high-precision temperature measurement is achieved, and meanwhile compared with other existing optical fiber sensing structures, the optical fiber sensing structure has the advantages that the optical fiber sensing structure is simple in structure and low in cost. The possibility of optical fiber breakage in the manufacturing process is greatly reduced, and rapid preparation can be realized; and meanwhile, the cascaded Bragg grating fiber structure can realize FP interference, so that high-precision measurement of pressure is realized, and the influence on MZ interference is relatively small.

The present application relates to a kind of superfine alkali earth hexaaluminate inorganic fiber and its preparation method, the diameter of the alkali earth hexaaluminate inorganic fiber described is 0.1 μm-3.0 μm, and it is continuously adjustable in this range, the prepared alkali earth hexaaluminate fiber keeps fiber flexibility in the temperature range of room temperature to high temperature 1300 DEG C, and keeps fiber crystal phase stability and fiber form integrity at high temperature 1400 DEG C.The preparation method is to mix aluminum sol, alkali earth salt, high molecular polymer and dissolve in water to obtain sol, then electrospinning precursor fiber is obtained, and the precursor fiber is obtained by high-temperature heat treatment to obtain alkali earth hexaaluminate inorganic fiber.The present application has low cost, and fiber structure stability is good, has wide application prospect in the fields such as catalyst, catalyst carrier, fiber structure reinforcement, heat insulation and the like.

This invention relates to a rare earth aluminate inorganic fiber and its preparation method, wherein the main crystalline phase of the rare earth aluminate is composed of ReAl. 11 O 18 Composed of ReAlO3 (Re = La, Ce, Pr, Nd), the relative content of the two phases is continuously adjustable within the range of 0–100 wt%. The fiber diameter ranges from 0.2 μm to 6.0 μm. The fiber maintains flexibility under high-temperature conditions from room temperature to 1450℃ and maintains microstructure and crystalline phase stability from room temperature to 1650℃. The preparation method uses aluminum sol as the aluminum source, rare earth salts as the rare earth source, and a polymer as a spinning aid. Precursor fibers are obtained by electrospinning or centrifugation, and the precursor fibers are then heat-treated to obtain rare earth aluminate inorganic fibers. This invention features sol stability, good spinnability, simple preparation process, and low cost. The prepared inorganic fibers have a stable and controllable structure, intact morphology, and good flexibility, showing promising applications in thermal insulation, flexible electronics, flue gas dust removal, and battery separators.

The invention discloses a surface flaw detection device for modal fiber fabric processing, and relates to the technical field of flaw detection, the surface flaw detection device comprises a bottom plate, a supporting assembly, a driving assembly and an expansion assembly, the supporting assembly is fixedly connected to the top of the bottom plate, and the supporting assembly comprises a supporting frame and a positioning seat. In the invention, the fabric roll in a stretched state can expand the fiber structure and expose the defect points in the fiber interwoven structure of the modal fiber fabric surface, so that compared with defect detection of the modal fiber fabric in a tiled state, the defect detection method can avoid the problem that smaller defects of the modal fiber fabric cannot be effectively displayed due to stacking of the fiber structures; after the fabric roll is stretched and expanded, the detection camera is used and runs to carry out image visual detection on the surface of the fabric roll, so that whether the surface of the fabric roll has flaws or not can be judged, the flaws of the modal fiber fabric are comprehensively detected, and the accuracy of a detection result is improved.

Disclosed is a media for capturing carbon dioxide from a gas stream of ambient air or industrial exhaust. The media includes a fiber matrix having fine fiber strands formed from at least one first polymer capable of capturing carbon dioxide through absorbance or adsorbance. The fine fiber strands have a first mean diameter of 5000 nm or less. Further, the media includes a plurality of nodules dispersed in the fiber matrix, and the plurality of nodules are made from a nodule material capable of capturing carbon dioxide through absorbance or adsorbance. The media can be configured for use in a carbon capture element of a carbon capture cell disposed within a carbon capture system, such as a direct air or point source carbon capture system.

The invention relates to the technical field of spinning preparation, and discloses cool color master batch gradient blended spinning and a preparation method thereof.The preparation method comprises the steps that the proportion of cool master batches and color master batches is obtained, and the cool master batches and the color master batches are prepared; the preparation method comprises the following steps: performing nano coating treatment on a cool master batch and a color master batch to obtain an optimal synergistic ratio of the cool master batch and the color master batch, dynamically adjusting a blending ratio and a process path, performing programming regulation and control on a cool degree and color shade to execute a partitioned melting and mixing strategy, and performing staged functional component mixing; a gradient color distribution strategy is executed, material distribution in the fibers is adjusted, annular airflow is adopted for cooling, the cooling speed and the cooling flow direction are controlled, and the melt is rapidly shaped; comparing the actual parameters of the generated fiber structure with the target performance demand parameters, and judging whether the color distribution uniformity, the cool feeling performance index and the structural integrity meet preset standards or not; according to the scheme, the diversified requirements of the market for cool feeling and color can be better met.