11results about How to "Modulus improvement" patented technology

The invention discloses a solid waste-based multifunctional tailing asphalt pavement material and a preparation method thereof, and the pavement material comprises the following components in parts by mass: 4.5-5.5 parts of polyurethane modified asphalt, 45-60 parts of titanate modified iron tailings, 2-5 parts of surface activated copper tailing powder, 20-35 parts of copper tailing sand and 0.5-1.0 part of acetic anhydride modified wollastonite fiber. The high and low temperature performance, the durability and the self-healing performance of the asphalt mixture are comprehensively improved by modifying the solid waste tailing material and the asphalt, and the application range of the asphalt mixture is effectively widened.

The run-flat tire comprises a tire tread, a tire side wall, a tire body and a tire bead, and the tire bead is not provided with a bead filler structure and is only composed of a steel wire ring which is gradually narrowed from bottom to top; the run-flat tire further comprises inner supporting rubber, the section of the inner supporting rubber is in a crescent shape, and the inner supporting rubber is located between the tire side lining and the tire body cord fabric. The section of the outer supporting rubber is triangular, and the outer supporting rubber is located between the tire body cord fabric and the tire side wall; the wear-resistant rubber is in contact with the rim; the sidewall rubber is covered on the carcass ply; wherein the outer support rubber, the wear-resistant rubber and the sidewall rubber adopt a pre-composite structural design. On the premise that apex does not exist, the modulus and size relation between all parts of the tire side wall is optimized, and the running time and distance of the tire in the air shortage state are prolonged; in addition, the design concept of pre-compounding the outer support rubber and the sidewall is adopted, so that the production complexity can be reduced.

The invention relates to the technical field of laser additive manufacturing, and discloses an enhanced FeCoNiCrMn high-entropy alloy coating with different WC particle sizes, the alloy coating is composed of FeCoNiCrMn high-entropy alloy powder and WC particles, the mass fraction of the FeCoNiCrMn high-entropy alloy powder is 85%, the mass fraction of the WC particles is 15%, the particle size of the WC particles is 20-55 [mu] m or 100-150 [mu] m, and the particle size of the FeCoNiCrMn high-entropy alloy powder is 20-55 [mu] m or 100-150 [mu] m. The strength of the high-entropy alloy coating is improved by reasonably controlling the mass fraction and the particle size of the high-entropy alloy coating in the high-entropy alloy coating, meanwhile, the invention provides a preparation method of the high-entropy alloy coating, different components are fused more uniformly through powder feeding, then crystal grains of a microstructure are homogenized, and through experimental observation, the high-entropy alloy coating can be prepared into the high-entropy alloy coating. When the particle size of the WC particles ranges from 20 micrometers to 55 micrometers, and the mass fraction is 15%, the strengthening effect is optimal.

The present invention relates to a polyimide film obtained by copolymerizing at least one diamine and at least one acid dianhydride, and more particularly to a polyimide film having excellent transparency, excellent weather resistance and excellent visibility due to minimal color change caused by external ultraviolet exposure, and thus capable of being used as an exterior window covering.

The invention belongs to the technical field of hydrogel, and discloses injectable hydrogel as well as a preparation method and application thereof. The injectable hydrogel disclosed by the invention is prepared from the following components: sulfhydrylated microspheres and dopamine modified hyaluronic acid, the preparation raw materials of the sulfhydrylated microspheres comprise a main monomer, a pH response monomer, a redox response monomer, an emulsifier, an initiator and a reducing agent. The dopamine modified hyaluronic acid is prepared from the following raw materials: dopamine hydrochloride and hyaluronic acid. The injectable hydrogel provided by the invention can form hydrogel with certain modulus and better stability under the condition of human body temperature, and shows excellent mechanical properties and biocompatibility; in addition, the mechanical property of the hydrogel formed in a human body can be adjusted by adjusting the ratio of the sulfhydrylated microspheres to the hyaluronic acid and the pH value of the injectable hydrogel, and the hydrogel has obvious advantages.

The invention provides hyperbranched polyamide-functionalized graphene oxide (HPA-GO) modified bismaleimide (BMI) resin, and relates to the technical field of bismaleimide resin.The HPA-GO modified BMI resin is prepared from DMF (N, N-dimethylformamide) dispersion liquid of HPA-GO, diphenyl bismaleimide, deionized water and diallyl bisphenol A. The preparation method comprises the steps that the BMI resin is prepared from the following raw materials, the preparation method comprises the following steps: reacting diphenyl bismaleimide with DMF dispersion liquid of HPA-GO, washing, carrying out suction filtration, drying, adding diallyl bisphenol A, reacting, and carrying out stepped curing to obtain the HPA-GO modified BMI resin.

The invention discloses a preparation method of a light anti-bending nylon 12 composite material. The preparation method comprises the following steps: firstly, preparing aramid pulp into a dispersion, and compounding the dispersion with a thermoplastic polyester elastomer (TPEE) to prepare a TPEE-aramid pulp compound; then carrying out surface treatment on the chopped carbon fibers by adopting a dopamine hydrochloride solution and a surface modifier to obtain modified chopped carbon fibers; finally, nylon 12, the TPEE-aramid pulp compound, the modified short carbon fibers, a cross-linking agent, an antioxidant and white oil are subjected to melt extrusion granulation, and the light anti-bending nylon 12 composite material is prepared. The material not only has the advantages of good lightweight effect, bending resistance, mechanical properties and the like, but also shows good economic applicability, the invention also discloses application of the lightweight bending-resistant nylon 12 composite material, and the lightweight bending-resistant nylon 12 composite material is a nylon 12 composite material which can be applied to preparation of thermoplastic carbon plates for shoes.

This utility model discloses a wear-resistant carbon fiber composite core cable, relating to the field of cable technology. It includes a cable body and a core, with the core located at the center of the cable body. The core consists of multiple carbon fiber bundles and filler material between the carbon fiber bundles. An inner insulation layer is tightly wrapped around the core, and an outer insulation layer is fitted over the inner insulation layer. A protective layer is then provided on the outside, consisting of a buffer layer, a wear-resistant fiber layer, and a wear-resistant rubber layer, sequentially fitted from the inside out. This utility model significantly improves the wear resistance of the cable, extends its service life, reduces operating costs, and lightens its weight, facilitating installation and laying, by optimizing the cable's structure and materials.

The invention relates to a method for preparing cellulose films with different orientations and an application method, and belongs to the technical field of biomass-based high polymer materials. The technical problems that in the prior art, the locking effect of a cellulose strong hydrogen bond network is difficult to overcome, and high orientation degree and high crystallinity cannot be synchronously achieved under the mild condition are solved. The preparation method comprises the following steps: firstly, providing at least one raw material of micron-scale, nano-scale or regenerated cellulose to prepare a precursor, gelatinizing to form stretchable gel, performing stretching orientation according to the size of the raw material by adopting a differential proportion, and finally, putting the gel in an environment with the temperature of 40-90 DEG C and the relative humidity of 30-90% in a stretching state to perform mechanical-thermal-thermal coupling curing, thereby obtaining the cellulose / cellulose composite material. The cellulose molecular chain is promoted to be rearranged and crystallized along the orientation direction by utilizing humidity plasticizing and heat energy driving. The prepared film has high orientation degree and high crystallinity, and is suitable for the fields of high-end packaging materials, flexible electronic device substrates, biomedical materials and the like.

The invention relates to the technical field of mesophase pitch-based carbon fiber preparation, and discloses a radial folding structure mesophase pitch-based carbon fiber as well as a preparation method and application thereof. The preparation method comprises the following steps: selecting mesophase pitch as a raw material, and preparing mesophase pitch protofilaments through melt spinning; the mesophase pitch precursor is sequentially subjected to pre-oxidation treatment, carbonization treatment, graphitization treatment, surface treatment and sizing, and the radial folding structure mesophase pitch-based carbon fiber is obtained. In the melt spinning process, the length-diameter ratio L1 / D1 of a spinneret orifice is (2-3): 1, the divergence angle theta at the outlet of the spinneret orifice is 20-45 degrees, and a two-section air blowing cooling mode is adopted at the outlet of the spinneret orifice. The section of the mesophase pitch-based carbon fiber prepared by the method is integrally arranged in a radial shape, and the graphite sheet layers are mutually folded to form an interlocking structure, so that the defect that the traditional radiation structure fiber is easy to split along the radial direction in the heat treatment process is effectively inhibited, and the tensile strength of the fiber is remarkably improved.

This utility model relates to the field of automotive spoiler technology, and more particularly to a lightweight, high-strength automotive spoiler, comprising a spoiler main structure. Positioning blocks are fixedly connected to the lower left and right ends of the spoiler main structure. Positioning screws are inserted into the upper ends of both positioning blocks. Protective covers are fitted onto the outer surfaces of both positioning blocks. Connecting structures are fixedly connected to both ends of the spoiler main structure. Spoiler blades are fixedly connected to the opposite ends of the two connecting structures. A wear-resistant layer is applied to the outer surfaces of the spoiler main structure and the two connecting structures. The connecting structure includes a first support plate, with an insert block and two insert rods fixedly connected to the left end of the first support plate. The insert block is located between the two insert rods. This lightweight, high-strength automotive spoiler, through its main structure and connecting structures, facilitates the connection and adjustment of the automotive spoiler.