46results about How to "High reproducibility of preparation" patented technology

In part, the invention relates to optical caps having at least one lensed surface configured to redirect and focus light outside of the cap. The cap is placed over an optical fiber. Optical radiation travels through the fiber and interacts with the optical surface or optical surfaces of the cap, resulting in a beam that is either focused at a distance outside of the cap or substantially collimated. The optical elements such as the elongate caps described herein can be used with various data collection modalities such optical coherence tomography. In part, the invention relates to a lens assembly that includes a micro-lens; a beam director in optical communication with the micro-lens; and a substantially transparent film or cover. The substantially transparent film is capable of bi-directionally transmitting light, and generating a controlled amount of backscatter. The film can surround a portion of the beam director.

The invention discloses a nano-hydroxyapatite / polydopamine wet-adhesive hemostatic powder for external use and a preparation method thereof. The hemostatic powder is nano-hydroxyapatite loaded with polydopamine. The preparation method is as follows: adding nanometer hydroxyapatite and dopamine into weak alkaline solution, reacting at room temperature; freeze-drying the product, and preparing nanometer hydroxyapatite / polydopamine needle-shaped composite hemostatic powder. The material has a multifunctional structure of hydroxyapatite and polydopamine, which can be further modified with many substrates. The material can be applied to different forms of hemostasis in different dosage forms, and combined with other medical materials and medical devices, it can be made into emergency life-saving powder, hemostatic hydrogel, self-adhesive dressing, hemostatic antibacterial sponge, etc. Wound healing, pain relief drugs are doped or cross-linked with nano-hydroxyapatite, or these drugs are reacted with polydopamine to prepare new drug delivery carriers and realize the multifunctional integration of hemostatic materials.

The invention relates to a doped multilayer core-shell silicon-based composite material for lithium-ion batteries and a preparation method thereof. The material is doped with at least one non-metallic element and a A metal element, the structure of which is to use element-doped silicon-oxygen compound particles as the core, and a multilayer composite film tightly coated on the surface of the core particle as the shell; the core particle contains uniformly dispersed elemental silicon nanoparticles, wherein The content of doping elements gradually decreases from the outside to the inside and there is no obvious interface. At the same time, the surface of the inner core particles forms a dense lithium silicate compound due to the doping of lithium elements; the multilayer composite film is a carbon film layer and is composed of A doped composite film layer composed of carbon film layer and other element components. When used in the negative electrode of lithium-ion batteries, it has electrochemical characteristics such as high capacity, good rate performance, high Coulombic efficiency, good cycle performance, and low expansion rate.

The invention relates to the technical field of microporous membrane materials, and discloses an electrodeposition preparation method of the microporous membrane material, the microporous membrane material and applications thereof. The method includes: (1) forming a non-conductive micro-lattice on an electrode and using it as a template; (2) placing the template in an electrolyte for electrodeposition, and there is no micro-lattice on the electrode. forming a film-like deposition layer in the region; and (3) peeling off the film-like deposition layer. The method of the present invention is efficient, simple, and large-area controllable; membrane materials with special and complex pore structures with adjustable sizes and shapes can be prepared; the edges of the pores are neat and the preparation is highly repeatable, and the mechanical and electrical properties are stable, relatively Low density and other advantages; the preparation method is widely applicable, and the microporous membrane material prepared by the method of the invention can be used in the fields of lithium ion batteries, oil-water separation, chemical biosensors, solar cells and supercapacitors.

The invention discloses a mesoporous carbon microsphere supported composite catalyst as well as a preparation method and application of the mesoporous carbon microsphere supported composite catalyst. The catalyst is composed of a mesoporous carbon microsphere as well as an active component and a carbon quantum dot which are supported on the mesoporous carbon microsphere; the particle size of the catalyst ranges from 100nm to 1000nm; the active component is one or a combination of several of platinum, palladium, iridium, ruthenium and rhodium; the loads of metals in the active component are as follows: 0wt%-10.0wt% of palladium, 0wt%-10.0wt% of platinum, 0wt%-10.0wt% of iridium, 0wt%-10.0wt% of ruthenium and 0wt%-10.0wt% of rhodium, and not all the loads of palladium, platinum and rhodium are equal to zero; the total load of the active component is 1.0-20%; and the load of the carbon quantum dot is not higher than 30.0wt%. The invention provides the application of the mesoporous carbon microsphere supported composite catalyst to reaction for synthesizing chloroaniline shown as a formula (II) by carrying out selective catalytic hydrogenation on chloronitrobenzene shown as a formula (I) to show that the mesoporous carbon microsphere supported composite catalyst has the characteristics of high conversion rate, high catalytic activity and high stability.