9 results about "Fibre dispersion" patented technology

The application provides a silk fibroin nanofiber composite film and a preparation method and application thereof. The preparation method comprises the following steps: preparing a self-supporting film with an ordered and continuous fiber network framework from a silk fibroin nanofiber dispersion liquid, wherein the fiber network framework serves as a reinforcing phase; contacting the self-supporting film with a solution containing a matrix phase and / or a functional phase, so that the matrix phase and / or the functional phase is filled into the fiber network framework of the self-supporting film to obtain a composite precursor film; and extruding the composite precursor film, or extruding and cross-linking the composite precursor film to obtain the silk fibroin nanofiber composite film. The method of the application adopts a time sequence separation strategy of 'first making a framework and then filling', and the self-assembly ordered structure of the silk fibroin nanofiber is completely reserved. The reinforcing phase, the matrix phase and the functional phase in the obtained composite film synergistically act, and the composite film has high mechanical strength, low swelling rate and functional integrability, and can be applied to the fields of implantable medical devices or biosensors.

The method for manufacturing a fiber mat includes a step of dispersing fine fibers having thermoplasticity in a dispersion medium, and a step of matting the dispersed fine fibers on a support. The step of matting includes a step of forming a fiber mat (30) by picking up the fine fibers on the support, and a step of irradiating light to a first main surface (31) of the fiber mat (30) on the side opposite to the side on which the support is present. In the step of irradiating light to the first main surface (31) of the fiber mat (30), the fine fibers on the first main surface (31) side are fused.

The invention discloses a fiber dispersing and distributing device for a vertical shaft type planetary mixer, which comprises a support frame and a fiber dispersing sub-device, the fiber dispersing sub-device is arranged on the support frame, the fiber dispersing sub-device is used for carrying out multi-stage dispersing treatment on fiber materials, and a vibration mechanism is also arranged on the outer wall of the fiber dispersing sub-device; wherein the fiber dispersing sub-device comprises a first charging barrel, and an upper-layer grating and a lower-layer grating which are sequentially arranged along the flowing direction of a fiber material, and the aperture of the upper-layer grating is larger than that of the lower-layer grating; and the fiber cloth sub-device is also installed on the supporting frame, and a feeding port of the fiber cloth sub-device is communicated with an outlet of the fiber dispersion sub-device. Through the excitation of the vibration mechanism and the synergistic effect of the two stages of grids with different pore diameters, efficient crushing and graded screening of fiber materials are achieved, and the multiple requirements for characteristic adaptation of high-tensile grouting materials, uniform fiber dispersion and agglomeration prevention, offshore construction adaptation and no damage to the performance of the grouting materials can be met at the same time.

The invention discloses a concrete mixing monitoring and fiber dispersibility evaluation method based on data fusion. According to the method, the scene adaptability and the evaluation accuracy of the whole monitoring method are remarkably improved by adaptively adjusting the contribution weight of the video dynamic flow value and the power fluctuation variance in the whole stirring period. According to the algorithm, feature weights are dynamically distributed innovatively according to the stirring process, a higher weight is given to a dynamic flow value reflecting macroscopic fluidity in the material mixing stage at the initial stirring stage, and the flow features of preliminary fusion of fibers and a matrix are mainly captured; and entering a stable period along with stirring, automatically transitioning to evaluation logic dominated by power fluctuation variance, and accurately identifying the microscopic stable state after the fibers are uniformly dispersed. The dynamic adjustment mechanism effectively solves the problem of evaluation deviation of traditional fixed weight fusion in different stirring stages, and further enhances the evaluation robustness under complex working conditions.

This utility model discloses a crack-resistant mortar fiber dispersion uniformity tester, comprising a tester body and a metal sample plate containing test specimens. The tester body is equipped with a positioning mechanism and a bending mechanism. The fixing mechanism includes a placement groove and a positioning structure, the positioning structure including a positioning roller one and a positioning roller two. The bending mechanism includes an arc-shaped bending component. The tester body also includes an adjustment mechanism, comprising a turntable and a drive motor. The tester body is equipped with a central control terminal. This utility model, by setting multiple sets of arc-shaped bending components with different curvatures on the turntable, allows for rapid switching by controlling the turntable rotation via the drive motor, meeting diverse testing needs. It can test crack-resistant mortars of different specifications and application scenarios, expanding the tester's applicability and solving the problem of limited testing scenarios in traditional testing methods. It is particularly suitable for scenarios requiring frequent switching of testing conditions or large-scale batch testing.

A support member including at least one first layer and a second layer that are stacked along a thickness direction of the support member. Each of the at least one first layer and the second layer includes a matrix and fibers. The fibers in the matrix are dispersed in the matrix. On a plane parallel to a surface of the support member, an angle α formed between an extending direction of the fiber in the first layer and an extending direction of the fiber in the second layer satisfies α>0°.

This invention provides a method and apparatus for characterizing and evaluating the uniformity of fiber pulp dispersion. The method includes: obtaining the actual dimensions of a pulping device and constructing a three-dimensional geometric model based on the actual dimensions; determining the flow physics model, boundary conditions, and initial conditions of the fluid within the three-dimensional geometric model based on the actual operating conditions of the pulping device; then performing flow field simulation to obtain flow field parameters; constructing filling units based on the actual operating conditions and determining the target size of the particles used to simulate fibers; the number of particles of the target size included in the filling unit is used to characterize the fiber concentration; performing simulation calculations based on the flow field parameters and the particles in the filling unit to obtain a converged solution; and extracting and analyzing the converged solution to obtain the coefficient of variation used to characterize the uniformity of fiber dispersion under actual operating conditions. The fiber pulp dispersion uniformity characterization and evaluation method provided by this solution is applicable to engineering-scale applications and is more universal and reliable.

The application discloses a high-strength composite fiber plugging system which is composed of flexible fiber, rigid fiber, suspended viscosity increasing agent, fiber dispersing agent and water. The application also discloses a preparation method of the high-strength composite fiber plugging system, and the steps are as follows: (1) adding formula amount of water into a container, then adding formula amount of flexible fiber, formula amount of rigid fiber and formula amount of fiber dispersing agent into the container in sequence, and mixing uniformly to obtain a mixed solution; (2) stirring the mixed solution obtained in the step (1) at a certain stirring speed, slowly adding formula amount of suspended viscosity increasing agent into the container while stirring, and then stirring uniformly. The application has the advantages of uniform dispersion time less than 120 minutes, viscosity less than 350 mPa·s, suspension stability time more than 1 day, plugging pressure gradient more than 10 MPa / m, plugging rate more than 95%, and thermal stability time of the system at 130 DEG C more than 6 months.