11results about How to "Prevent extension" patented technology

The present application relates to the technical field of road engineering, and particularly relates to a bridge-head cover plate combined fiber anti-cracking flexible splicing structure and a preparation method thereof, which comprises a base layer with an asphalt pavement part on the top and an abutment; the base layer, the abutment and the asphalt pavement part form a groove, the side wall of the groove is formed by the asphalt pavement part, the bottom wall of the groove is formed by the base layer and the abutment; the inner wall of the groove is coated with a two-component high-viscosity high-elasticity interface adhesive; from bottom to top, the groove is sequentially filled with a high polymer elastic body and a reinforced anti-cracking asphalt mixture; a basalt fiber bar anchoring member is pre-buried in the inner wall of the groove, and the high polymer elastic body and the reinforced anti-cracking asphalt mixture wrap the basalt fiber bar anchoring member; through the stress diffusion of the interface adhesive layer, the deformation buffer of the flexible bottom layer and the anti-cracking cooperation of the rigid surface layer, the road surface longitudinal slope mutation caused by the differential settlement of the abutment and the base layer is effectively relieved, the vehicle jumping impact force is reduced, the road surface longitudinal corner is reduced, and the driving smoothness and the structural durability are significantly improved.

The present application relates to the technical field of silicone rubber material, in particular to a sericite modified silicone rubber material and a preparation method thereof.The present application overcomes the problems of poor dispersion of sericite in the organic silicon matrix and poor compatibility of fluorosilicon and common silicon.The silicone rubber material is prepared from polysiloxane hybrid base glue prepared by in-situ polymerization of fluorine-containing / ethenyl double modified sericite, fluorosilicon raw rubber, methylphenylvinyl silicone rubber, MQ silicone resin, hydrogen-containing silicone oil and vulcanizing agent;the preparation process involves double functional group grafting on the surface of sericite, monomer in-situ ring-opening polymerization coating, multiphase blending to build interpenetrating network and hydrogen-containing silicone oil chain extension to cooperate with gradient vulcanization, through building a rigid-flexible stereo enhanced network, the material is endowed with excellent oil resistance, heat resistance and high mechanical strength, and can be used in the field of automobile manufacturing.

This invention belongs to the technical field of graphene and functional rubber composites, specifically a simplified preparation process for high tear strength graphene-modified natural rubber based on an interpenetrating double crosslinked network structure constructed with two vulcanizing agents. This invention uses two vulcanizing agents: sulfur and peroxide. Sulfur rapidly forms a high-density carbon-sulfur crosslinked network (-C-Sx-C-) in the natural rubber composite, constituting the mechanical load-bearing skeleton between the natural rubber main chains, imparting high tear strength and fatigue resistance. Peroxide has a relatively slow vulcanization rate, and it slowly decomposes at lower temperatures to generate free radicals, constructing a stable -C-C- secondary crosslinked network between the terminal segments of the carbon-sulfur main network outside the sulfur vulcanization skeleton network. This improves the three-dimensional structural integrity of the vulcanization network, reduces the loss modulus of the rubber, and thus reduces heat generation during dynamic compression. This invention effectively improves the tear strength of natural rubber vulcanizates through the synergistic effect of nanofiller reinforcement and the interpenetrating double crosslinked network structure.

This invention relates to the field of composite coating technology, and more particularly to a graphene-enhanced plasma electrolytic oxidation composite coating, its preparation method, and its application. The preparation method of the graphene-enhanced plasma electrolytic oxidation composite coating provided by this invention includes the following steps: mixing a graphene dispersion and a basic electrolyte to obtain a graphene-enhanced PEO composite electrolyte; using AlSi... 10 Using a Mg alloy substrate as the anode and a stainless steel electrolytic cell as the cathode, plasma electrolytic oxidation treatment is performed in the graphene-reinforced PEO composite electrolyte to obtain a graphene-reinforced plasma electrolytic oxidation composite coating. The graphene-reinforced plasma electrolytic oxidation composite coating prepared by this method exhibits excellent comprehensive properties, including mechanical properties, abrasion resistance, and corrosion resistance.

This invention discloses a UV-curable raw lacquer hybrid prepolymer coating and its preparation method, comprising: rosin acid, hydroxyethyl acrylate, p-toluenesulfonic acid, polymerization inhibitor, 4-acryloyloxybenzophenone, polyethylene glycol methyl ether acrylate, azobisisobutyronitrile, refined raw lacquer, trimethylolpropane triacrylate, leveling agent, and defoamer. The coating uses rosin acid as a rigid framework, forming a macromolecular photoinitiator by side-linking benzophenone photoinitiator groups and flexible polyether segments. Then, through a controllable UV pre-irradiation process, it undergoes free radical grafting with lacquer urushiol to construct a "rigid-tough tunable" hybrid network. This invention solves the problems of slow curing of raw lacquer, easy migration of small-molecule photoinitiators, and high coating brittleness in existing technologies. The coating uses a macromolecular photoinitiator design, with the initiating groups fixed to the rosin framework through chemical bonds, fundamentally solving the migration problem. Furthermore, the "pre-grafting" process improves compatibility, endowing the coating with excellent comprehensive properties.

This invention relates to the technical field of silt reinforcement, and discloses a method for preparing a fiber-reinforced composite curing agent for silt reinforcement, comprising the following preparation steps: 1) drying carbide slag and desulfurized gypsum separately; 2) grinding and mixing the dried carbide slag and desulfurized gypsum to form a grinding material; 3) mixing the grinding material with slag, fly ash and glass fiber to form a fiber-reinforced composite curing agent; after being incorporated into the silt, the glass fiber randomly interweaves in the solidified soil to form a three-dimensional network, and the excellent tensile and pull-out properties of the glass fiber itself hinder or delay the deformation and failure of the soil; when the soil is deformed by external force, the glass fiber prevents the development and extension of cracks by exerting interfacial friction, enhances the soil's resistance to deformation, and thus changes the failure mode, solving the problem of brittle failure of silt-reinforced soil.

This utility model discloses a high-strength TBM toolbox, belonging to the technical field of TBM toolboxes. The key technical features are: a substrate with a transition layer on its surface, a wear-resistant layer on the surface of the transition layer, and two reinforcing strips fixedly connected to each side of the substrate surface. Each reinforcing strip has grooves on both sides and is of a quasi-I-shape structure. The two reinforcing strips together form a quasi-cross space, which is filled with the transition layer. This design improves the connection strength between the wear-resistant layer and the substrate, enhancing the strength of the TBM toolbox.

A semiconductor device includes: a first peripheral circuit structure including a first substrate having a first thickness and a first transistor configured to operate at a first voltage; a second peripheral circuit structure located on the first peripheral circuit structure and including a second substrate having a first conductivity type and having a second thickness equal to or smaller than the first thickness, a second transistor located on a front surface of the second substrate and configured to operate at a second voltage greater than the first voltage, and a back doped layer located on a back surface of the second substrate and including an impurity of the first conductivity type; and a cell structure electrically connected to the second peripheral circuit structure and including a gate electrode and a channel structure extending into the gate electrode in a vertical direction.

This utility model discloses a multi-directional protective swimming ring, including a swimming ring body. Several connecting components are fixedly fitted onto the outside of the swimming ring body. An installation opening is provided on one side of the swimming ring body, and a rope tensioner is fixedly installed inside the installation opening. A traction rope is provided on the outside of the swimming ring body, inserted inside the connecting components. The two ends of the traction rope are wound around the inside of the rope tensioner, which is used for at least tightening and unwinding the traction rope. The rope tensioner used in this utility model can tighten the traction rope on the outside of the swimming ring body, preventing the traction rope from extending excessively outside the swimming ring body and avoiding the danger of entanglement caused by a long traction rope.