6results about How to "Improve mechanical durability" patented technology

This invention provides a triboelectric nanogenerator and its fabrication method. The generator operates in a vertical contact-separation mode, with a positive friction layer of PET film and a negative friction layer of PDMS composite film with a single layer of dense SiO₂ microspheres inserted on its surface. The fabrication process employs a two-step spin-coating method: first, a PDMS solution is spin-coated onto a substrate; then, a suspension of SiO₂ microspheres is spin-coated onto the uncured surface. After heating and curing, a composite negative friction layer is formed, which is then assembled with electrodes and a support structure. This invention significantly increases the triboelectric contact area and enhances charge trapping capability by constructing the SiO₂ microsphere insertion layer, thereby greatly improving output performance. Furthermore, the fabrication process is simple and low-cost, making it suitable for powering microelectronic devices and self-powered sensing applications.

The present application relates to ion exchange membrane technical field, particularly to a kind of low swelling crosslinked poly (arylene-quininium salt) anion exchange membrane and preparation method thereof.Poly (arylene-quininium) polymer is dissolved in first organic solvent, and halogenated poly (arylene-alkylene) polymer is added as macromolecular ionization reagent, and quininium group in partially ionized poly (arylene-quininium) polymer is then added with excess small molecule ionization reagent to make quininium group completely ionized, to obtain crosslinked poly (arylene-quininium salt) polymer solution.The obtained crosslinked poly (arylene-quininium salt) polymer solution is added to first precipitant to obtain crosslinked poly (arylene-quininium salt) polymer powder, and it is dissolved in second organic solvent to obtain polymer solution, coated on homogeneous substrate or porous substrate, dried to obtain low swelling crosslinked poly (arylene-quininium salt) anion exchange membrane.The present application uses halogenated poly (arylene-alkylene) as macromolecular crosslinking agent to construct crosslinked network in poly (arylene-quininium salt) ion polymer, so that the obtained crosslinked poly (arylene-quininium salt) anion exchange membrane shows low swelling, high mechanical strength, high alkali resistance and outstanding gas barrier property.

The application relates to the technical field of high-molecular fiber sensing, in particular to a high-toughness TPU / ANF / inorganic nanoparticle composite nanometer friction positive electrode material and a preparation method thereof. The preparation method takes TPU as a base main material, does not depend on a chemical cross-linking method, and realizes flexible adaptation of a complex deformation scene by virtue of excellent stretchable deformation performance and flexible characteristics of the TPU. Meanwhile, aramid nanofiber (ANF) is introduced as a reinforcing phase, the high-strength and high-modulus characteristics of the aramid nanofiber are utilized to improve the stress and strain capacity and mechanical stability of the base, the aramid nanofiber can lock the molecular structure in the TPU, and the aramid nanofiber can inhibit significant shrinkage of the material when the temperature is increased, so that the aramid nanofiber has the dual functions of mechanical enhancement and size stability, and the reliability of a generator is ensured.

The application provides a heat-resistant and moisture-resistant degradable PLA adhesive tape, which has a four-layer structure and comprises an inner layer, a substrate layer, a functional layer and a protective layer; the inner layer is a degradable pressure-sensitive adhesive with high viscosity and certain hydrophobicity; the substrate layer is a degradable PLA film or a PLA and PBAT blended film; the functional layer is an electrospun layer, and the electrospun layer is a gradient electrospun film containing CaSO3 with different concentrations; the water absorption salt content is low near the substrate side and high near the outer surface side; and the protective layer is a long-chain silane modified SiO2. The application constructs a wettability gradient distribution from inside to outside, i.e. a hydrophobic substrate-hydrophilic gradient layer-super-hydrophobic outer layer, by using the electrospinning technology; the capillary suction effect of the hydrophilic layer is used to realize the one-way discharge of the edge infiltration of water; and the heat reflection and physical barrier mechanism of the super-hydrophobic coating of the outer layer are combined to synergistically improve the heat resistance and moisture resistance of the adhesive tape, so that the use requirement in a complex environment is met.

The utility model provides a high-frequency electro-cautery instrument with a turnover screen, which relates to the technical field of high-frequency electro-cautery instruments, and comprises a case, a movable base and a turnover screen component, an angle control component consisting of a dial plate, a tension spring, a positioning rack and a fixed toothed plate is adopted, and stepless adjustment of the angle of the screen is realized by pulling down the dial plate. After being loosened, the screen is automatically meshed and locked, so that a medical worker can quickly adjust the screen to the optimal visual angle with one hand, meanwhile, the screen is stable and does not deviate after being adjusted, flexibility and safety are both considered, and the requirement for real-time parameter monitoring in an operation is particularly met; secondly, through the linkage design of multiple connecting rods, rotating shafts and hinges, the screen can be turned over around the case in multiple dimensions through the case connecting assembly, through cooperation with a universal wheel structure of the movable base, view angle adaptation of different operation body positions and operation heights can be met, flexible transfer of equipment in an operating room can be achieved, the use scene is remarkably expanded, and the operating efficiency is improved. Meanwhile, the operation efficiency and the operation precision are also improved.

The invention discloses a three-gradient microstructure flexible pressure sensor and a preparation method and application thereof, and aims to provide a sensor which is clear in structural design and can realize wide linear range, high sensitivity and high stability, a preparation method of the sensor, and application of the sensor in micro-pressure signal detection and plant physiological monitoring. The sensor comprises a sensing layer, an electrode layer and a hollow supporting layer, the sensing layer comprises an elastomer substrate with a three-gradient microstructure and a conductive film layer covering the surface of the three-gradient microstructure; the elastomer substrate is prepared by the following steps: spin-coating a flexible precursor solution on the surface of a mold, carrying out vacuum defoaming, heating and curing, and stripping to obtain the elastomer substrate with a three-gradient convex structure; the flexible precursor solution is composed of a polydimethylsiloxane solution and a single-layer MXene dispersion liquid; and the mass content of the MXene in the elastomer solid matrix is 2.5%-8%. The sensor is excellent in comprehensive sensing performance and has high stability and reliability.