9results about How to "Improve material performance" patented technology

This invention belongs to the field of biomedical materials technology, specifically relating to a chitosan hemostatic sponge and its preparation method. This patent addresses the problems of residual acetic acid and side reactions, low strength, and low absorbency caused by cross-linking methods during the preparation of chitosan hemostatic sponges. It innovatively proposes a method for physically cross-linking chitosan hemostatic sponges using hydrogen bonding-electrostatic synergistic superabsorbency based on alcohol-regulated substances. By introducing alcohols to regulate the electrostatic interaction between chitosan amino groups and acetic acid, while simultaneously adjusting the hydrogen bonding interaction between chitosan molecules, and introducing other polymer materials to construct a semi-interpenetrating network, the overall material properties are enhanced. The chitosan hemostatic material prepared by this process, although without the addition of cross-linking agents, still exhibits an insoluble sponge-like structure, good flexibility, and excellent absorbency and hemostatic effect.

The invention relates to the technical field of composite material structural members, in particular to a design and construction method for recycling GFRP rib concrete beams of retired fan blades. A recycled GFRP (glass fiber reinforced plastic) reinforced concrete beam for retired fan blades comprises a concrete beam body, the bar framework is arranged in the concrete beam body and comprises at least two GFRP longitudinal stress bars arranged in the length direction of the concrete beam body and GFRP stirrups fixedly connected with the GFRP longitudinal stress bars and arranged in the length direction of the concrete beam body at intervals; wherein the GFRP longitudinal stress bars and the GFRP stirrups are all made of waste fan blade composite materials through mechanical recovery. The mechanically recycled GFRP rib material is used for replacing a traditional steel bar to serve as a stress bar of a concrete beam body, the environment pressure brought by large-scale composite material waste can be effectively relieved through recycling of the retired fan blade, conversion from a retired material of new energy equipment to a structural engineering material is achieved, and development of low-carbon circular economy is promoted.

The application provides a tempering method suitable for an acid pickling line, comprising the following steps: step S1: calculating actual elongation rate by using a laser speed meter and a thickness gauge to respectively measure the front and rear speed and the front and rear thickness in real time; step S2: performing elongation rate closed-loop control according to the actual elongation rate measured in real time by taking the rolling force as an adjusting amount; step S3: performing compensation on the rolling force to eliminate the elongation rate fluctuation caused by acceleration and deceleration of the unit; and step S4: performing feedforward control by using the thickness deviation measured by the front thickness gauge to suppress the elongation rate fluctuation. The application also provides a tempering system and device suitable for the acid pickling line and a medium. The application realizes the tempering function of high-precision elongation rate closed-loop control by using the last stand in the acid pickling line, widens the use function of the acid pickling line, and improves the surface quality and material performance of the product.

The invention discloses a mechanical energy storage and release device and a thread trimming device. The mechanical energy storage and release device comprises a base; the movable part can move relative to the base; the energy storage part acts between the base and the movable part and is configured to store mechanical energy for driving the movable part to move; the state switching type locking mechanism has a first mechanical state and a second mechanical state; wherein in the first mechanical state, the state switching type locking mechanism introduces geometric constraint on a force application path of the energy storage component, so that the movable part resists the acting force of the energy storage component and is locked; the state switching type locking mechanism can be switched from the first mechanical state to the second mechanical state by applying an external triggering effect; and in the second mechanical state, the geometric constraint is relieved, and the energy storage part is released and drives the movable part to move.

The invention discloses stainless steel wire straightening, calendering and automatic winding equipment which comprises a rack and further comprises a steel wire coil pay-off mechanism, a first tension guide wheel mechanism, a stress straightening mechanism, a calendering mechanism, a second tension guide wheel mechanism, a wire arranging wheel mechanism and a flat wire winding mechanism which are arranged on the rack. The steel wire coil pay-off mechanism is used for outputting a whole coil of stainless steel wires; the tension guide wheel mechanism I is used for adjusting tension and guiding the steel wire to be conveyed to the stress straightening mechanism; the stress straightening mechanism is used for circumferentially twisting the conveyed steel wire so as to release the multi-dimensional stress of the steel wire; the calendaring mechanism is used for calendaring the steel wire subjected to stress straightening into a flat shape; the second tension guide wheel mechanism is used for adjusting tension and guiding the rolled flat steel wire to be conveyed to the wire arranging wheel mechanism. The wire arranging wheel mechanism is used for guiding the steel wire to be wound neatly and tightly in the winding process. And the flat wire winding mechanism is used for winding the calendered flat steel wire.

The present invention relates to a method of manufacturing a cellulose product having a flat or non-flat product shape by a pressure moulding apparatus comprising a forming mould. The forming mould has a forming surface defining said product shape, The method comprises the steps of: arranging a cellulose blank containing less than 45 weight percent water in said forming mould; heating said cellulose blank to a forming temperature in the range of 100°C to 200°C; and pressing said cellulose blank by means of said forming mould with a forming pressure acting on the cellulose blank across said forming surface, said forming pressure being in the range of 1 MPa to 100 MPa.

The invention provides a hierarchical porous cement-based seawater uranium extraction material and a preparation method thereof. The material is in a multi-layer roll shape, directional pore channels are formed in the material, and macroscopic gaps are formed between layers; calcium carbonate whiskers grow on the inner walls of the directional pore channels in situ; the hierarchical pore cement-based seawater uranium extraction material is prepared from the following final raw materials in parts by weight: 100 to 150 parts of sulphoaluminate cement, 50 to 120 parts of ground steel slag powder, 15 to 40 parts of acrylamide monomer, 0.4 to 1.5 parts of N, N '-methylene bisacrylamide, 0.05 to 0.4 part of ammonium persulfate and 70 to 150 parts of deionized water. The preparation method comprises the following steps: firstly, preparing a KH-550 modified solution and a PAN / DMSO solution, carrying out material amination and vacuum impregnation phase conversion to form a PAN coating layer, and then carrying out amidoximation reaction. According to the material, the marine uranium extraction efficiency and the comprehensive performance of the material are remarkably improved; the method provided by the invention is flexible and controllable in process and has good industrial amplification potential.

The application discloses a low-tolerance and high-sensitivity large-view-field main-focus astronomical optical system, which comprises a main mirror, a correcting mirror A, a correcting mirror B, a correcting mirror C, a correcting mirror D, a correcting mirror E, a correcting mirror F and a focal plane; wherein light is reflected by the main mirror, and then sequentially passes through the correcting mirror A, the correcting mirror B, the correcting correcting mirror C, the correcting mirror D, the correcting mirror E and the correcting mirror F to reach the focal plane; the main mirror is a concave aspheric mirror, and the surface shape is a quadratic hyperboloid or a high-order aspheric surface. The application realizes low machining and assembling tolerance sensitivity while ensuring excellent large-view-field imaging of the main-focus optical system; through analyzing the distribution of aberration on each optical surface, the position and structure parameters of special glass materials and the optical power of optical elements are optimized, the average of the contribution of each optical surface aberration is realized, and thus the machining and assembling tolerance sensitivity is reduced.