398 results about "Fiber structure" patented technology

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 provides a mid-infrared optical frequency comb. The mid-infrared optical frequency comb comprises a near-infrared optical frequency comb seed source of a polarization-maintaining all-fiber structure; the all-fiber nonlinear amplification and pulse compression module is connected with the near-infrared optical frequency comb seed source through a polarization maintaining fiber and is used for amplifying the power of the seed light and compressing the pulse width after generating a linear chirped pulse; the all-fiber nonlinear spectrum broadening module is connected with the all-fiber nonlinear amplification and pulse compression module through a polarization maintaining fiber and is used for broadening a laser spectrum; the difference frequency module is used for receiving the laser pulse processed by the all-fiber nonlinear spectrum broadening module and generating an intermediate infrared laser pulse through intra-pulse self-difference frequency; wherein the seed source, the all-fiber nonlinear amplification and pulse compression module and the all-fiber nonlinear spectrum broadening module are connected through a polarization maintaining fiber to form an all-fiber integrated structure. By adopting the scheme, the anti-interference capability of the system can be enhanced, miniaturization and high operation reliability are realized, the debugging process is simplified, and the difference frequency efficiency is improved.

This invention relates to a modified titanium dioxide for matting polyester fibers and its preparation method. The modified titanium dioxide comprises a mesoporous titanium dioxide core and a cysteine ​​graft layer grafted into the pores of the mesoporous titanium dioxide. The mesoporous titanium dioxide core is prepared by evaporation-induced self-assembly using an alkenyl sulfonate surfactant as a liquid crystal template and tetraethyl or tetrabutyl titanate as the titanium source. Due to the self-polymerization reaction of the alkenyl sulfonate, the resulting polyalkenyl sulfonic acid compound reduces the crystallinity of the mesoporous titanium dioxide, thereby significantly reducing its photocatalytic activity. The mesoporous titanium dioxide is mixed with cysteine ​​and heated to graft cysteine ​​into its pores. The presence of cysteine ​​results in the modified titanium dioxide exhibiting both good matting properties and suppressed photocatalytic activity, preventing fiber structure damage from prolonged ultraviolet irradiation when applied to polyester fibers.

The invention provides a composite phase change energy storage material based on a multilayer hollow spinning structure and a preparation method thereof, and belongs to the technical field of phase change fibers. The invention provides a composite phase change energy storage material based on a multi-layer hollow spinning structure, the composite phase change energy storage material based on the multi-layer hollow spinning structure is of a multi-layer tubular fiber structure, and the composite phase change energy storage material sequentially comprises a core layer phase change material, a second shell layer, a third layer phase change material and an outermost shell layer from inside to outside. The composite phase change energy storage material based on the multi-layer hollow spinning structure provided by the invention is of a four-layer tubular fiber structure, has higher phase change material loading capacity, high mechanical strength, capability of quickly responding to environment temperature and good leakage prevention effect, can realize intelligent thermal management, and overcomes the defect of poor environmental adaptability of single-function textiles.

This invention discloses an FBG strain sensor based on misaligned fusion spliced ​​coreless optical fiber and its fabrication method. The sensor comprises an input single-mode fiber, multiple segments of coreless optical fiber, and an output single-mode fiber connected sequentially. The input single-mode fiber is fused together with the first segment of the coreless fiber in a misaligned manner, and the next segment of the coreless fiber is fused together with the previous segment in a misaligned manner, with the misalignment direction of the next segment opposite to that of the previous segment, but the misalignment distance being the same. The output single-mode fiber and the last segment of the coreless fiber are fused together axially. The central axes of the input and output single-mode fibers are collinear, and the cores of the input and output single-mode fibers are connected by a photolithographically written straight waveguide. A fiber Bragg grating is then optically etched along the straight waveguide. This invention uses femtosecond lasers to fabricate the FBG on the misaligned fiber structure, increasing the structure's strain response and making the strain sensitivity of the FBG on this structure higher than that of an FBG fabricated on ordinary silica optical fiber.

The application discloses a Stokes parameter encoder, which comprises a fiber optical circulator and an optical path round trip path; a polarization maintaining fiber Faraday rotator is arranged on the optical path round trip path to rotate the polarization of light by 45 degrees; the fiber optical circulator is a polarization maintaining fiber optical circulator; the fiber optical polarization beam splitter is a polarization maintaining fiber optical polarization beam splitter; the delay fiber is a polarization maintaining delay fiber; and the fiber optical phase modulator is a polarization maintaining fiber optical phase modulator. The application further discloses a parameter encoding method of the encoder. The above technical scheme can perfectly offset the rotation angle deviation problem caused by the device, can guarantee the stability of the rotation angle regardless of the angle deviation of the device, is easy to realize the driving circuit, is easy to integrate and small in size due to the pure fiber structure, and can realize the continuous variable quantum key distribution of the complete GG02 protocol based on the Stokes encoder.

The utility model provides an auxiliary oiling device of a drawing machine, which belongs to the field of textile production and comprises a support, a limiting mechanism used for adjusting the oiling angle and position is arranged on the side wall of the support, and an oiling assembly used for oiling drawn fibers is arranged on the limiting mechanism. The oiling assembly is provided with an oil conveying assembly used for conveying lubricating oil to the oiling assembly. According to the oil feeding assembly, when the oil feeding assembly is used, a V-shaped plate is fixedly connected with the telescopic inner pipe through welding, the bottom of the V-shaped plate is in bolted connection with a fixing plate through three fixing bolts, a stable structure is formed, the installation angle of oil absorption felt is guaranteed, disassembly and maintenance are convenient, and the oil absorption felt is of a porous fiber structure and can absorb a large amount of lubricating oil and slowly release the lubricating oil; meanwhile, the oil absorption felt is soft in texture, and mechanical damage cannot be generated when the oil absorption felt makes contact with silk threads.

The application discloses aramid composite paper and a preparation method and application thereof, and relates to the technical field of aramid paper. The application provides aramid composite paper, which comprises three layers of fiber structure layers which are sequentially stacked, the first layer of fiber structure layer comprises aramid short-cut fibers and polyphenylene sulfide pulp, the second layer of fiber structure layer comprises plant fibers, and the third layer of fiber structure layer comprises aramid fibrids and polyimide fibers. The three-layer structure of the aramid composite paper of the application strengthens the compactness and uniformity of the insulating paper from two aspects of macro and micro, thereby enhancing the mechanical and electrical strength. Meanwhile, the specific selection of the specific first layer and third layer can better cooperate with the second layer of fiber structure layer, strengthen the local overheating identification function of the aramid composite paper, and solve the problems of the non-ideal uniformity of the existing aramid composite paper and the incapability of identifying local overheating on the basis of maintaining the excellent electrical insulation and heat resistance of the original aramid paper.

The invention relates to the technical field of acoustic wave device application and biological tissue engineering, in particular to a method for constructing a multi-component heterogeneous fiber structure under the assistance of acoustic tweezers. According to the method, an acoustic tweezers technology and a microfluidic spinning technology are combined, an electric signal is converted into an acoustic surface wave through the piezoelectric effect of a piezoelectric material, and a beam-shaped acoustic standing wave field is formed in a microchannel of a specific structure; different target cells form a stable fiber configuration under the interaction of microchannel limitation and acoustic radiation force, and spatial precise classification and arrangement of multiple types of cells are realized. The low-temperature-sensitive hydrogel is introduced in the cell injection process, and the fiber scaffold is formed after ultraviolet curing, so that the fiber structure of the cells is still maintained after the sound field is removed. The cells treated by the surface acoustic wave can form a complex three-dimensional bionic tissue structure more easily, and the cell viability is remarkably improved. Various fiber structures can be formed by regulating and controlling sound field parameters, and great potential is shown in the field of in-vitro barrier model construction.

The invention discloses a reinforced protection method for an edge section of a full-paper-based container, which belongs to the technical field of paper-based container treatment, and comprises the following steps: step 1, end surface pretreatment: carrying out chip removal treatment on the cut end surface of a paper tube, and keeping a loose state of fibers; step 2, local impregnation and permeation: vertically and downwards immersing the end surface of the paper tube into the prepared solution, fixing the immersion depth to be 0.8 mm, keeping the immersion depth for 5 seconds, and enabling the paper tube to naturally permeate upwards along a gap of a paper layer by utilizing the low viscosity characteristic of the liquid; and 3, gradient curing is conducted, specifically, the treated paper tube is placed in circulating hot air at the temperature of 55 DEG C to be dried for 15 minutes. Different from a traditional method for coating the whole pipe body or compounding a plastic inner container, only the weakest cutting end face is subjected to precise treatment, the equivalent and even better protection effect is achieved, meanwhile, the use amount of chemicals is greatly reduced, the production cost is reduced, and the original advantages of air permeability of the wall body of the paper pipe and the like are kept.

The invention discloses a wafer capacitor adopting a carbon fiber pin and a production process and production equipment thereof. The wafer capacitor comprises a wafer capacitor body, a silver electrode and the carbon fiber pin. The production process comprises the steps of adsorbent preparation, carbon fiber wrapping with the adsorbent, pre-reduction reaction, insulation layer wrapping and wafer capacitor preparation. The production equipment comprises a lifting pool, a silver ion soaking pool, a phosphorous acid soaking pool, a hot extrusion mechanism, an extruder and a laser welding unit. According to the method, carbon fibers are wrapped with an adsorbent with high silver adsorption, a porous conductive carbon fiber structure with a nano-silver wire network is produced through pre-reduction of a reducing agent and a high-temperature reducing atmosphere reaction, and tin-free welding is carried out on a high-silver-content modified carbon fiber pin and silver on the surface of a wafer capacitor through laser welding; and the obtained product has the advantages of light weight, high strength, high conductivity, high welding strength, corrosion resistance, high temperature resistance and the like, so that the wafer capacitor adapts to a severe environment, and the application range is widened.

The present invention relates to structures for and methods of carbon capture, particularly separation of gaseous carbon dioxide from a gas mixture by a cyclic adsorption and desorption process using a sorbent material for carbon dioxide adsorption. We describe a hollow fiber for adsorption and desorption of carbon dioxide, comprising: a cylindrical hollow fiber structure capable of carbon dioxide sorption, where a cross-section of the hollow fiber structure is substantially symmetrical; and a semi-permeable layer that is impermeable to a liquid heat transfer medium but permeable to a vapor state of the heat transfer medium, where the semi-permeable layer is disposed on a surface of the hollow fiber structure adjacent to a lumen of the hollow fiber. We also describe a method for cyclic adsorption and desorption of carbon dioxide by exposing the hollow fiber to ambient air. CO2 in the ambient air is adsorbed to the hollow fiber.

The application discloses a large-area Ti-W-Al-W-Ti fiber reinforced layered composite plate and a vacuum interface explosive welding method, relates to the field of metal composite material processing, and discloses a preparation method of the large-area Ti-W-Al-W-Ti fiber reinforced layered composite plate, wherein the layered composite plate is composed of an upper Ti composite plate, an Al base plate, a lower Ti composite plate and interlayer reinforcing fibers; different high-strength and different specification tungsten fibers are used to reinforce the multi-layer large-area layered composite plate by designing stress-reducing layer structures and reinforcing fiber structures and a symmetric layering pattern, macroscopic large deformation, internal stress concentration and coupling problems are solved, and the large-area Ti-W-Al-W-Ti fiber reinforced layered composite plate explosive welding process design and parameter calculation are carried out for large-area and different physical and chemical property metals (the base plate, the composite plate and the metal reinforcing fiber), and the problems of low welding rate and interface bonding defects are solved.

The application provides a one-dimensional high-entropy alloy, a preparation method and application of the one-dimensional high-entropy alloy in CO2 ring addition reaction, and relates to the technical field of high-entropy alloys.The molar ratio of iron salt, cobalt salt, nickel salt, manganese salt, chromium salt and cerium salt in the one-dimensional high-entropy alloy is 1:1:1:1:1:1;the high-entropy alloy has a fiber structure, the fiber has a hierarchical pore structure which is interconnected, including macropores or mesopores formed by decomposition of the self-sacrificing template 1, and mesopores or micropores formed by decomposition of the self-sacrificing template 2.Through improvement of the process conditions, the one-dimensional high-entropy alloy material with a unique structure can be prepared under relatively mild conditions, so that the whole reaction process is safer and more economical, and meets the goal of green chemistry and sustainable development.Meanwhile, the one-dimensional high-entropy alloy material prepared provides a large specific surface area, fully exposes active sites, and can realize efficient and stable conversion of the carbon dioxide ring addition reaction.

The invention provides a cutting tool and a manufacturing method of the cutting tool. The cutting tool comprises a cutting edge part located on the outer edge and a fixing part located in the center. The blade part comprises a binding agent and abrasive particles, the binding agent binds and fixes the abrasive particles embedded in the binding agent to form a grinding layer, and the grinding layer is used for cutting a part to be cut; the fixing part comprises a fiber structure and a binding agent, the fiber structure is added into the binding agent, the fiber structure and the binding agent are combined to form the fixing part, and the fixing part is used for fixing the cutting tool on the cutting equipment. According to the cutting tool, the cutting edge part and the fixing part are made of different materials, the cutting edge part comprises the binding agent and the abrasive particles, and the abrasive particles are embedded and fixed into the binding agent; the fixing part is formed by combining the fiber structure and the binding agent, the fiber structure is added into the binding agent and fixed, the overall stability of the cutting tool is improved, and deflection or distortion of the cutting tool in the cutting process can be effectively avoided.

This product provides a wiping cloth suitable for media cleaning applications that suppresses the increase of particles due to friction during wiping, prevents contamination problems, offers high wiping performance, and leaves minimal residue. [Solution] A wiping cloth made of a fibrous structure using ultrafine polyamide fibers, wherein the single filament fineness of the ultrafine polyamide fibers is 0.7 dtex or less, the content of ultrafine polyamide fibers in the entire wiping cloth is 40% by mass or more, and the average number of airborne particles with a diameter of 0.1 μm or more is 10 particles / cm 2 The following is the wiping cloth.

A pressure-sensing laminate for a sports practice device according to the present invention comprises, with respect to a pressure-sensing laminate for sports practice device capable of sensing pressure applied by a player to a grip part: a conductive layer having pressure sensitivity; a circuit layer disposed to face the conductive layer and provided with a plurality of conductive patterns; and a separation layer disposed between the conductive layer and the circuit layer and made of a fiber structure comprising a plurality of fibers, wherein, when pressure is applied, the conductive layer and the circuit layer come into contact with each other to sense the pressure.

The invention discloses a water photovoltaic energy supply-self-driven strain sensing integrated device based on electrostatic spinning polymer micro-nano fibers and a preparation method and application thereof. The preparation method comprises the following steps: preparing a PU micro-nano fiber film through an electrostatic spinning method; an o-CNT winding network is embedded into the surface of the PU fiber film through an ultrasonic cavitation technology, and a composite fiber structure is obtained; and loading the o-CB nanoparticles on the surface of the PU fiber in the composite fiber structure and in the o-CNT network through a dispensing process to obtain the hydrovolt energy supply-self-driven strain sensing integrated device based on the electrostatic spinning polymer micro-nano fiber. According to the prepared hydrovolt energy supply-self-driven strain sensing integrated device, water drops can continuously generate electric energy in the spontaneous flowing and diffusion process, and the resistance change caused by strain can be converted into the change of an output current signal without an external power supply. The method has a wide application prospect in the aspects of energy supply and self-driven sensing in the fields of flexible electronics, wearable devices and the like.

This invention provides a highly durable and functional recycled all-aromatic polyamide fiber, and a method for producing the same. [Solution] A recovered fiber structure containing meta-type all-aromatic polyamide fibers, para-type all-aromatic polyamide fibers, and conductive fibers is dissolved in an amide-based solvent. In this solution, 10 to 25% by mass of meta-type all-aromatic polyamide polymer is dissolved to produce an all-aromatic polyamide dope. This dope is then used for spinning to obtain regenerated all-aromatic polyamide fibers.

To provide an aqueous inkjet ink suitable for inkjet printing of a structure made of cotton or synthetic fiber. Another object of the present invention is to provide a method for printing a fabric structure by an inkjet method, which is excellent in optical density (OD), bleeding suppression, or color development after printing.SOLUTION: The water-based inkjet ink of the present teaching is an ink for printing structures made of cotton or synthetic fibers, in which the water-based inkjet ink (1) contains at least pigments, dispersants, solvents and water, (2) the dispersants have an amine value of not less than 10mgKOH / g, and the amine value is higher than the acid value, (3) the content of the pigments is not less than 0.01% by mass and not more than 30% by mass, and (4) the value of [(content of dispersants) / (content of pigments)] * 100 is not less than 5 and not more than 200.SELECTED DRAWING: None

The utility model discloses a breathable self-adaptive conveying device for non-woven fabric processing, and relates to the technical field of conveying devices. The device comprises two supporting plates, wherein a conveying belt and an auxiliary conveying mechanism positioned on the upper side of the conveying belt are arranged between the two supporting plates; the auxiliary conveying mechanism comprises a center rod rotating on the upper side of the conveying belt, a plurality of fixing columns are arranged on the center rod, and a plurality of telescopic shafts are arranged on the fixing columns in a sliding fit mode. The telescopic shaft and the contact piece are linked through the connecting rod, when the thickness of the non-woven fabric fluctuates or the non-woven fabric locally swells, the pressure between the contact piece and the non-woven fabric is adjusted, damage to the fiber structure of the non-woven fabric caused by excessive extrusion of the conveying device is reduced, pressure adjustment visualization is achieved through the scale marks and the indicating head, and an operator can set and reproduce parameters; the quality consistency of different batches of products is achieved, complex debugging is not needed when product specifications are replaced, and the optimal conveying parameters can be recovered by directly referring to historical scale values.

This invention discloses a biomimetic bundled fiber evaporator, its preparation method, and its application, belonging to the field of solar interface evaporation water treatment technology. The evaporator includes a bundled fiber core formed by binding C-shaped or Y-shaped cross-section fibers or multi-twisted cotton threads with binding straps; a tannic acid-iron ion complex or MXene superhydrophilic photothermal coating coated on its surface; a hydrophobic thin layer of polydimethylsiloxane or polymethylhydrosilane sprayed onto the upper side of the evaporator; and an insulating float for buoyancy. This invention's biomimetic bundled fiber structure, inspired by enoki mushrooms, replaces the traditional ice template method with simple physical constraints, resulting in a simple, rapid, and low-cost preparation process. This structure achieves efficient, low-resistance water transport and excellent thermal localization effects. Experiments show that the evaporator can achieve a pure water evaporation rate of 2.43~2.82 kg·m³ under one day of sunlight. ‑2 ·h ‑1 It also has excellent evaporation performance and long-term stability, and can be widely used in seawater desalination, high-salt wastewater treatment and other fields.

The present invention relates to a fibrous structure (900) for making a part (90) of composite material, the fibrous structure (900) comprising a stack of several layers of fibers (910, 912, 914), and a reinforcing element (920) situated between a lower layer (912) and an upper layer (914), wherein the reinforcing element (920) comprises: - a support (922) interposed between the lower (912) and upper (914) layers and having a lower face (922a) covered by the lower layer (912), and an upper face (922b) covered by the upper layer (914), and - strands (924) projecting from the lower (922a) and upper (922b) faces of the support (922) and engaged respectively in the lower (912) and upper (914) layers. Figure for the abstract: Fig. 4

The present invention improves the handleability of a fibrous structure and ensures sufficient dispersibility thereof.　A method for producing a fibrous structure according to the present invention comprises: a preparation step for preparing a fibrous structure A that is aggregated in a state in which voids are formed between a plurality of fibrous materials; and a void removal step for removing some of the voids in the fibrous structure A to form a fibrous structure B, wherein when the bulk density of the fibrous structure A is ρA (g / mL), and the bulk density of the fibrous structure B is ρB (g / ml), 1.3≤ρB / ρA≤200 is satisfied.

This invention provides a composite membrane with a dual-fiber structure, its preparation method, and its applications. The composite membrane with a dual-fiber structure comprises: a first fiber layer and a second fiber layer having a porous structure; the pore size of the first fiber layer is 0.5–15 μm, and the pore size of the second fiber layer is 20–500 μm; the first fiber layer has first fiber filaments with a diameter of 0.1–5 μm; the second fiber layer has second fiber filaments with a diameter of 2–100 μm; the diameter of the first fiber filaments is smaller than the diameter of the second fiber filaments; wherein at least a portion of the first fiber filaments fills the second fiber layer; and the composite membrane also contains an adhesive, which penetrates into the pores of the first and second fiber layers, bonding at least a portion of the first and second fiber filaments together. The composite membrane with the dual-fiber structure of this invention is not prone to delamination and has good mechanical properties.

The invention discloses a preparation method of high-performance cellulose insulation paper modified by nano-alumina. The preparation method comprises the following steps: preparing a nano-alumina dispersion liquid, preparing a nano-cellulose dispersion liquid, adding paper pulp fibers, the nano-alumina dispersion liquid and the nano-cellulose dispersion liquid into deionized water, and carrying out papermaking, the mass fraction of the nano cellulose in the modified cellulose edge paper is 1-12%. According to the preparation method provided by the invention, nano aluminum oxide and nano cellulose particles are adopted as modified materials, a large number of heat conduction channels are formed in a fiber structure of the insulation paper, the heat conduction performance of the insulation paper is improved, and the insulation paper can still keep stable performance and is not prone to thermal aging and deformation in a high-temperature environment; a large number of traps can be formed in the paper, migration of charged particles is hindered, conductive current is reduced, and the volume resistivity of the insulation paper is improved; the method is simple in steps and low in cost, and industrial production and practical application of the insulation paper are facilitated.

The invention belongs to the technical field of lasers. The invention provides an all-fiber laser with adjustable pulse width and a pulse width tuning method. The all-fiber laser comprises a narrow-band dissipation soliton mode-locked fiber laser seed source, a first fiber isolator, a fiber amplifier, a second fiber isolator, an optical circulator and a dispersion element which are sequentially arranged along a light path. The seed source generates a mode-locked pulse with a fixed initial spectral width; the nonlinear effect intensity is controlled by adjusting the driving current of the pumping source, so that the spectrum broadening amount of the pulse in the amplification process is regulated and controlled, the variable total spectrum width is formed, the spectrum width is subjected to linear time-frequency mapping through a dispersion element with a fixed group delay dispersion value, and finally continuous and electric control adjustment of the output pulse width is achieved. The whole system adopts an all-fiber structure, has the advantages of high stability, compact structure, good tuning linearity and the like, and is suitable for industrial processing, sensing and scientific research application scenes needing flexible pulse width regulation and control.

The invention relates to the field of unmanned aerial vehicle cables, in particular to a strip-shaped ultra-light photoelectric composite mooring unmanned aerial vehicle power supply cable which comprises power conductor units, a force bearing fiber structure, an optical fiber communication unit and an insulating outer protection layer. The power conductor unit is used for electric energy transmission, the optical fiber communication unit is used for data communication, and the force bearing fiber structure is used for bearing cable tension. The insulating outer protection layer is arranged on the outer layer of the cable, is made of an insulating material, and serves as an insulating layer and a protection layer of the cable at the same time. The cable adopting the structural design has the characteristics of simple structure, light weight, high tensile strength and small air resistance, realizes integration of power supply and communication, can meet the use requirement of long-time hovering operation of the mooring unmanned aerial vehicle, and adapts to the core demand of an unmanned aerial vehicle operation scene.

This invention discloses a low detection limit fiber optic gas sensor, comprising an input single-mode fiber, a tapered fiber, and an output single-mode fiber. A PDMS / MOF gradient composite film is uniformly distributed in the waist region of the tapered fiber. In the PDMS / MOF gradient composite film, the MOF doping gradient decreases from the outer surface towards the waist region. This sensor, by distributing the PDMS / MOF gradient composite film in the tapered region, leverages the excellent gas adsorption capacity of MOF, the light transmittance and gas permeability of PDMS, and the gradient design of MOF doping to further improve sensor sensitivity and reduce manufacturing costs. Combined with the sensitization mechanism of the dispersion inflection point of the tapered fiber structure, it achieves low detection limit gas detection. Furthermore, the fabrication method is simple and inexpensive.