59results about How to "Performance can be adjusted" patented technology

The invention discloses a phenylboronic acid hydrogel-based sugar-sensitive microneedle pad and a preparation method thereof. The phenylboronic acid hydrogel-based sugar-sensitive microneedle pad comprises a base and a microneedle array which is located on the base, wherein the base and microneedles are mainly prepared from a vinyl phenylboronic acid monomer and a vinyl monomer through free radical copolymerization; microneedle bodies and the base can both be used for embedding insulin drugs; the phenylboronic acid monomer is selected from 3-acrylamidophenylboronic acid, and the vinyl monomeris selected from N-isopropyl acrylamide and N-vinyl pyrrolidone. The preparation method disclosed by the invention is simple; the obtained phenylboronic acid hydrogel-based sugar-sensitive microneedlepad is regular in structure, has good mechanical performance, is capable of effectively piercing the skin, has stimulus responsiveness to glucose concentration, and is capable of regulating the release rate and the dosage of insulin according to blood sugar concentrations and effectively preventing a risk of hypoglycemia caused by excessive release of the insulin.

The invention provides a pressure sensor and a preparation method thereof, the pressure sensor comprises a glass base and a silicon strain diaphragm located on the glass base, one surface of the glass base is provided with a recessed cavity, and the silicon strain diaphragm comprises an insulating medium layer located on the front surface and a silicon substrate covered by the insulating medium layer; and a beam membrane structure of a cross beam structure is arranged at the position, facing the cavity, of the front face of the silicon strain membrane, each end of the beam membrane structure is provided with a set of piezoresistors, a set of heavily-doped contact areas and a pair of metal leads, the piezoresistors are connected with the heavily-doped contact areas in series, and the two ends of the piezoresistors are led out of the heavily-doped contact areas through the metal leads, the metal leads and the heavily doped contact regions form ohmic contact on the front surface of the silicon strain diaphragm, and Wheatstone bridges are formed among the varistors; the beam membrane structure comprises a plurality of groove structures arranged on the cross beam and is used for adjusting the performance of the pressure sensor to adapt to different measuring ranges; and the sensor is higher in linearity, more stable in structure and suitable for different measuring ranges.

The invention relates to an in-situ authigenic aluminum-silicon gradient composite material and a preparing method thereof. According to the in-situ authigenic aluminum-silicon gradient composite material, the silicon content is gradually reduced from the surface to the core part, and the in-situ authigenic aluminum-silicon gradient composite material is formed in a manner that an outer-layer hypereutectic high-silicon organization layer is in gradual transition to an inner eutectic aluminum-silicon organization layer, or the outer-layer hypereutectic high-silicon organization layer is in transition to the eutectic aluminum-silicon organization layer, then the eutectic aluminum-silicon organization layer is in transition to a hypo-eutectic aluminum-silicon organization layer, or the outer-layer hypereutectic high-silicon organization layer is in transition to the eutectic aluminum-silicon organization layer, then the eutectic aluminum-silicon organization layer is in transition to thehypo-eutectic aluminum-silicon organization layer, and finally, a pure aluminum layer is taken as the core part. All organization layers of the material are in smooth transition, and no obvious interface exists. To solve the problem that massive primary silicon and acicular eutectic silicon exist in an aluminum-silicon gradient composite material, firstly, a lanthanum or cerium alterant is added in a pure aluminum liquid, and then the mixed aluminum liquid reacts with silicon dioxide to obtain the aluminum-silicon gradient composite material. In this way, the morphology of primary silicon andeutectic silicon is improved, and finally, round-head short-rod-shaped or round-head grain-shaped primary silicon and eutectic silicon are obtained.

The present invention discloses a hybrid dynamic polymer, which simultaneously contains a dynamic covalent bond based on a triazolinedione-indole adduct, and a supramolecular hydrogen bond, and further at least contains a cross-linking network, wherein a side hydrogen bond group or a terminal hydrogen bond group participates in the formation of the supramolecular hydrogen bond, and contains the hydrogen bond group being not derived from triazolinedione and indole and the adduct of triazolinedione and indole. According to the present invention, the supramolecular hydrogen bond can make the material have stimulating responsiveness and self-healing property, and the dynamic covalent bond can make the covalently-cross-linked polymer have the structural stability and the mechanical strength under non-catalytic reaction conditions, and further has dynamic reversibility under special reaction conditions, such that the hybrid dynamic polymer has characteristics of self-healing property, recyclability, repeatable processability and the like, and can be widely used in self-healing materials, tough elastomers and other fields through the co-action of the supramolecular hydrogen bond and the dynamic covalent bond.

The invention discloses a thin film deposition device adopting a controllable magnetic field for screening laser plasma. The thin film deposition device comprises a laser plasma cavity, a target support and a target material, wherein the target support and the target material are arranged in the laser plasma cavity, the laser plasma cavity is connected with a focusing magnetic field cylinder through a magnetic filtering elbow, the focusing magnetic field cylinder is connected with a thin film deposition cavity, a substrate table and a substrate are arranged in the thin film deposition cavity,and the magnetic filtering elbow comprises an elbow and a conductive coil wound around the elbow. A thin film precipitation method through screening the laser plasma by the controllable magnetic fieldis further disclosed. The device and method is convenient to operate, simple in process, strong in laser plasma controllability and capable of preparing a high-quality nano-film material, and has practical application value.

The invention belongs to the field of flexible electronics devices, and particularly discloses a preparation method and a product of a shape adaptive fast response soft heater. The method comprises the following steps: (1) spin-coating a polyvinyl alcohol aqueous solution on a hard substrate and heating to cure the hard substrate to form a sacrificial layer; (2) processing the conductive materialinto a conductive layer by screen printing; 3) spin-coating a flexible polymer on the sacrificial layer and heating to cure the flexible polymer; (4) dissolving the sacrificial layer to strip the hardsubstrate; and (6) sticking a copper foil and an insulating layer on the initial soft heater body. The product is prepared by the above method. The soft heater has fast response speed, small requireddriving voltage, large deformation and good shape adaptability and can realize reliable grasping and heating of complex shape objects. Meanwhile, the thermal stability of the soft heater at high temperature is good and the performance of the soft heater can be adjusted by simply controlling the DC voltage of the power supply.