31results about How to "Suitable for industrial amplification applications" patented technology

The invention relates to boron nitride/epoxy resin composite and a preparation method and application thereof. The preparation method includes: 1) dispersing boron nitride nanosheet and a binder in water to form a mixed solution; 2) subjecting the mixed solution to bidirectional freezing, and removing ice crystal by lyophilization to obtain boron nitride aerogel with lamellar oriented structure; 3) filling the lamellar oriented structure of the boron nitride aerogel with cured epoxy resin to obtain the boron nitride/epoxy resin composite. The preparation method is simple to perform, is available to large-scale preparation and is suitable for industrial scaled application.

The invention relates to a preparation method of lamellar porous graphene oxide. The preparation method comprises the following steps: (1) dissolving graphene oxide and a binding agent into water to prepare a precursor solution; (2) putting the precursor solution into a container and carrying out a bidirectional freezing reaction to obtain an intermediate product, wherein a wedge-shaped device is arranged at the bottom of the container; (3) freezing and drying the intermediate product obtained by the step (2) to remove a solvent, so as to obtain the lamellar porous graphene oxide. The invention further relates to the lamellar porous graphene oxide. The method is simple to operate; the lamellar porous graphene oxide prepared by a bidirectional freezing method has a regular large-area and biaxial orientated lamellar porous structure.

The invention relates to a preparation method, a product and application of porous fibers with oriented pore structures. The preparation method comprises the following steps: 1) mixing a silk proteinsolution with a chitosan solution to prepare a mixed solution; 2) carrying out solution spinning on the mixed solution, carrying out directional freezing during spinning, and collecting fibers; and 3)freeze-drying the fibers to remove ice crystals to obtain the porous fibers with the oriented pore structures. According to the preparation method, by combining directional freezing and solution spinning, the pore structures of the obtained porous fibers are oriented, so that the porous fibers have excellent heat insulation performance and electric heating performance.

The invention relates to a high-temperature heat insulation fire-resistant fiber, a fabric, a preparation method and an application. The high-temperature heat insulation fire-resistant fiber is a polyimide porous fiber and has an axial orientation hole structure. The preparation method includes the steps: 1) performing solution spinning on polyamide acid saline gel, performing directional freezingduring spinning and collecting frozen fibers; 2) freeze-drying the frozen fibers and removing ice crystals to obtain the porous fiber with the orientation hole structure; 3) performing thermal amidation on the porous fiber to obtain the polyimide porous fiber. The preparation method is simple and suitable for industrial amplification application and can realize continuous large-scale preparation.

The invention relates to a preparation method, product and application of a radiation-proof porous fiber with an oriented pore structure. The preparation method comprises the steps that a spinning solution is prepared, wherein a radiation-proof filler is added during the preparation; spinning is performed through the spinning solution, wherein directional freezing is performed during spinning, anda frozen fiber is collected; ice crystals of the frozen fiber are removed. According to the method, by combining directional freezing and solution spinning, the porous fiber with the oriented pore structure is obtained; the radiation-proof filler is introduced in the preparation process, so that the fiber has excellent thermal insulation and radiation-proof performance.

The invention discloses a preparation method of a polyacrylate macroporous cross-linked polymer. The preparation method comprises the steps: (1) dissolving an acrylic monomer and an oil-soluble crosslinking agent in an oil-soluble solvent to form a precursor solution, wherein the weight percentage of the monomer in the precursor solution is 5wt%-20wt%, and the weight percentage of an initiating agent in the precursor solution is 0.1wt%-1wt%; (2) adding the initiating agent, putting the precursor solution at the temperature below the melting point of the solvent, and carrying out polymerization reaction to obtain an intermediate product; and (3) putting the intermediate product obtained in the step (2) at the temperature below the melting point of the solvent, and after fusing the solvent, compressing, washing, soaking and drying so as to remove the solvent, thus obtaining the macroporous cross-linked polymer. The preparation method disclosed by the invention has the advantages that selectable raw materials are sufficient and low in cost, the preparation method is suitable for industrial enlargement and application, and the prepared macroporous cross-linked polymer is small in relative density and high in specific strength, porosity and shape recovery percentage.

The invention provides a method of purifying HBc-VLPs or HBc-VLPs derivatives. The method includes: subjecting a bacterial liquid containing HBc-VLPs or HBc-VLPs derivatives to first thermal treatmentprior to second thermal treatment so as to obtain purified HBc-VLPs or HBc-VLPs derivatives. The method provided herein helps solves, via two-step gradient heating, the problem that existing universal one-step heating methods face low removal rate of miscellaneous proteins, while miscellaneous proteins may enter viral-like particles to cause product pollution; good product quality is guaranteed;the purity is high; the product purity may be increased to 99% and above by means of refining and otherness while the yield may be increased to about 77%; the method has good practical application value and industrial application value.

The invention relates to a preparation method of porous resin fiber with an orientation hole structure, a product and an application. The preparation method comprises steps as follows: 1) to-be-polymerized emulsion is subjected to emulsion spinning, directional freezing is performed during spinning, and frozen fiber is collected, wherein the to-be-polymerized emulsion comprises a resin monomer, afree radical polymerization initiator, a reactive emulsifier and a thickening agent or comprises a prepolymer, the free radical polymerization initiator, the reactive emulsifier and the thickening agent or comprises a self-emulsified prepolymer, the free radical polymerization initiator and the thickening agent; 2) the frozen fiber is subjected to a polymerization reaction in a low-temperature environment; 3) the frozen fiber is unfrozen and dried, and the porous resin fiber with the orientation hole structure is obtained. Through combination of the directional freezing, emulsion spinning andfreezing polymerization, the pore structure of the obtained porous resin fiber has orientation, and vacuum freeze-drying can be avoided in the preparation process.

The invention relates to a preparation method of superhydrophobic porous fibers with oriented pore structure, superhydrophobic porous fibers with oriented pore structure and application thereof. The preparation method comprises: preparing a spinning solution; performing spinning with the spinning solution, with directional freezing carried out while spinning, and collecting frozen fibers; removingice crystal from the frozen fibers; and performing surface superhydrophobic treatment on the porous fibers. the porous fibers with oriented pore structure are prepared by the combination of directional freezing and the spinning solution; the surface superhydrophobic treatment is performed on the porous fibers so that excellent heat insulation and superhydrophobic property are imparted to the porous fibers.

The invention discloses a preparation method of a monopolymer composite material based on planar silkworm cocoons and a composite material thereof. Mature silkworms are placed on a flat plate to spin to obtain planar silkworm cocoons, on one hand, the planar silkworm cocoons serve as a reinforcement phase of the composite material, and on the other hand, fibroin obtained by dissolving and regenerating the planar silkworm cocoons serves as a matrix of the composite material. The monopolymer composite material based on the planar silkworm cocoons is finally obtained by infiltrating a silk solution into the planar silkworm cocoons, naturally drying a composite system at normal temperature, curing the composite system in methanol, and naturally drying the cured composite system at normal temperature. The method disclosed by the invention is simple to operate, good interface bonding of the matrix and the reinforced phase in the composite material is realized by using the same natural polymer, the mechanical property of the material is improved, and the material has biodegradability.

The invention discloses a graphene thermal interface material production device and a preparation method thereof, and belongs to the technical field of thermal interface materials. The graphene thermal interface material production device comprises a fixing frame, a transmission box is arranged at the upper end of the fixing frame, and autorotation fixing bases are arranged on the inner wall of the transmission box; a plurality of autorotation fixing seats are arranged in an annular array, a microneedle cutting base is concentrically arranged in the center of the transmission box, a driving mechanism is arranged at the lower end of the fixing frame and comprises an indexing rotary table and a synchronous deflection motor, and the arranged indexing rotary table drives the microneedle cutting base to periodically rotate, The microneedle cutting base drives a microneedle assembly to perform microneedle cutting on the two-dimensional nanosheet dispersion liquid coated on the thermal interface substrate, the thermal interface material with high vertical orientation is prepared, the thermal interface material is subjected to microneedle cutting to form a radial structure, and the device is low in price, simple in process, suitable for large-scale continuous production and suitable for industrial amplification application.