4results about How to "Precise and controllable thickness" patented technology

The invention provides a multi-layer quantum dot film and a preparation method and application thereof.According to the preparation method of the multi-layer quantum dot film, layer-by-layer deposition and a light / heat double-trigger mild cross-linking strategy are combined, and rapid cross-linking curing is achieved through low-temperature (smaller than or equal to 100 DEG C) or low-dose light irradiation; irreversible damage of a quantum dot crystal structure or film deformation can be avoided, the method is suitable for ensuring flexible substrates and large-area preparation, and the thickness of the film is precisely controllable within the range of 50-500 nm; the thin film is uniform and compact, the AFM surface roughness is smaller than 3 nm, precise, high-quality and rapid preparation of the short wave infrared (SWIR) quantum dot thick film is achieved, and when the prepared thin film is applied to a photoelectric device, high detection rate (for example, the detection rate of a photoelectric detector reaches the 1012 Jones magnitude) and excellent long-term environment stability can be achieved.

The application provides a new type of gasket material for intelligent self-lubricating joint bearings and a preparation method and application thereof, and belongs to the technical field of composite materials, self-lubrication and intelligent monitoring, in particular, the preparation method of the new type of gasket material for intelligent self-lubricating joint bearings comprises the following steps: S1: preparing a conductive synergistic material; S2: preparing a modified performance reinforcing material; S3: preparing a phenolic resin diluent; S4: preparing a conductive modified phenolic resin adhesive film; S5: preparing an insulating modified phenolic resin adhesive film; S6: preparing a pretreated fabric; and S7: preparing a new type of gasket material. The new type of gasket material for intelligent self-lubricating joint bearings prepared by the above method can realize the integration of "material-function", intelligently monitor the wear state of the bearing according to the step change of the electrical conductivity, has the advantages of excellent friction-reducing and wear-resistant performance and high sensitivity, can significantly simplify the structure of the bearing system and reduce the maintenance cost, and is suitable for the fields of aerospace and the like.

The invention belongs to the technical field of surface modification of positive electrode materials of lithium ion batteries, and relates to an oxygen capture and thermal stability compound coating for a positive electrode material and application thereof, the oxygen capture and thermal stability compound coating comprises positive electrode active material particles and a compound functional coating covering the surfaces of the positive electrode active material particles, and rare earth elements comprise at least one of Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu; the transition metal element comprises at least one of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, Mn, Fe, Co and Ni; the thickness of the composite functional coating ranges from 1 nm to 200 nm. The double functions of oxygen capture and thermal barrier are achieved through the composite functional coating; lattice oxygen release of the positive electrode material in a high-voltage and high-temperature environment can be remarkably inhibited, the side reaction of an electrolyte or solid electrolyte interface is reduced, the cycle life is prolonged, and the safety performance is improved.

A method for preparing a microtextured electroplated coating of nano-silica capsules loaded with corrosion inhibitors is disclosed. This invention addresses the problems of insufficient corrosion resistance, poor water dispersibility of nano-silica, and poor compatibility between corrosion inhibitor loading and electrodeposition in existing microtextured coatings. The preparation method includes: 1. Hydrophilic modification of hollow nano-silica using an aminosilane coupling agent; 2. Adding a corrosion inhibitor to the hydrophilically modified hollow nano-silica dispersion and stirring to prepare nanocapsules; 3. Preparing a composite electroplating solution; 4. Performing electro-cleaning pretreatment on the substrate; 5. Preparing the composite coating on the substrate using an electroplating process. This invention achieves stable dispersion of nano-silica in an aqueous plating solution through hydrophilic modification, facilitating its entry into microtextured cavities. Utilizing the directional loading and responsive release mechanism of the corrosion inhibitor, long-term protection is achieved, significantly reducing the risk of pitting corrosion and interface failure, exhibiting long-lasting corrosion inhibition performance and self-healing ability.