9results about How to "Mild preparation method" patented technology

The invention provides herbal ointment for relieving limpness, numbness and swelling pain and a preparation method thereof, and belongs to the technical field of medicines. The traditional Chinese medicine composition is prepared from the following raw materials: codonopsis pilosula, cinnamon, angelica sinensis, corydalis serrate, paeonia lactiflora, peony root bark, ligusticum chuanxiong hort, liquorice, fructus evodiae, caulis spatholobi, leonurus, rhizoma corydalis, garden balsam stem, radix aconiti carmichaeli, rhizoma atractylodis, lycopodium clavatum, cortex dictamni, ramulus mori, radix clematidis, rhizoma arisaematis, semen brassicae and notopterygium root. The herbal ointment for relieving limp, numb and swelling pain has the effects of promoting blood circulation to remove blood stasis, expelling wind and removing cold, relieving pain and clearing damp, expelling toxin and enhancing immunity, is good in transdermal absorption promoting effect, long in contact time with skin and lasting in acting effect, can well improve toothache and arthralgia caused by shoulder pain, cervical vertebra pain, waist soreness and back pain, stiff neck, dizziness, headache and excessive internal heat, and has the effects of relieving pain, relieving swelling pain, relieving pain and relieving swelling pain. , varicosity, sprain, bruise, limpness, numbness and swelling pain of limbs, and the like, and has a wide application prospect.

The present application relates to the technical field of porphyrin-based covalent organic framework material preparation, in particular to a mild preparation method of acetaldehyde-based porphyrin covalent organic framework and application thereof, which comprises the following steps: step one: dispersing ligand 2', 5'-bis((ethyl sulfide) methyl)-[1,1':4',1''-triphenyl]-4,4''-diamine in acetonitrile solution to obtain solution A, and dissolving acetaldehyde-based porphyrin in dichloromethane to obtain solution B; step two: mixing solution A and solution B; step three: adding ferric chloride and acetic acid as catalysts to react under mild conditions to obtain acetaldehyde-based porphyrin covalent organic framework material, which has excellent gaseous iodine adsorption performance. The synthesis method provided by the present application has mild conditions, simplifies the high-temperature time-consuming shortcomings of traditional porphyrin-based covalent organic framework material synthesis, and realizes the synthesis of special ligand covalent organic framework.

The invention belongs to the technical field of nano materials, and particularly relates to a modified molybdenum disulfide nano material, a preparation method and application. The invention provides a preparation method of a modified molybdenum disulfide nano material, which comprises the following steps: uniformly dispersing molybdenum disulfide powder in an alcohol-water mixed solution, dropwise adding a soluble transition metal salt solution into the alcohol-water mixed solution in a stirring state, stirring, carrying out solid-liquid separation, washing, drying and collecting a solid product. The preparation method provided by the invention is simple and feasible, the modified molybdenum disulfide nano material with more excellent electro-catalytic hydrogen evolution performance can be obtained without adopting high-temperature and high-pressure conditions, the preparation conditions are milder, industrial production is easier to realize, and the preparation method has a wide application prospect.

The invention discloses a method for improving semiconductor photoelectrochemical cathode protection poor-corrosion-resistance metal, and relates to the field of metal material corrosion and protection. Aiming at the problem that semiconductor photo-induced electrons are difficult to transmit to a metal surface with poor corrosion resistance in a photoelectrochemical cathodic protection technology, the method comprises the following steps: preparing an organic coating, preparing a semiconductor photo-anode and realizing the photoelectrochemical cathodic protection technology. According to the method, the self-corrosion potential of the metal with the poor corrosion resistance can be regulated and controlled, semiconductor photo-induced electrons are promoted to be transmitted to the metal, and the photoelectrochemical cathode protection technology is applied to the metal with the poor corrosion resistance. The method is simple, effective and easy to operate, the application range of the photoelectrochemical cathode protection technology is expected to be expanded, the protection efficiency of the technology on metal is improved, and the protection time of the technology on metal is prolonged.

The invention discloses a titanium dioxide-quantum dot-silicon dioxide composite material with a multilayer core-shell structure as well as a preparation method and application of the titanium dioxide-quantum dot-silicon dioxide composite material. The core layer is composed of titanium dioxide nano-particles, the quantum dot middle layer is adsorbed to the surface of the core layer in a bridging mode through a silane coupling agent, and the compact silicon dioxide shell layer wraps the quantum dot middle layer. The method comprises the following steps: titanium dioxide nanoparticles are subjected to silanization modification to introduce sulfydryl, quantum dots are subjected to ligand exchange to obtain water-soluble sulfhydrylated quantum dots, the water-soluble sulfhydrylated quantum dots and the titanium dioxide nanoparticles form a quantum dot-titanium dioxide compound through interaction of the sulfydryl, and finally, a silicon dioxide shell is formed through silicon source hydrolytic condensation under a weak alkaline condition. Through core-functional layer-shell collaborative design, the problems that a traditional quantum dot composite material is weak in binding force, the quantum dots are prone to falling off and the stability is poor are solved, and the quantum dot composite material can be widely applied to the fields of photoelectric devices, photocatalytic materials and biological fluorescent markers.

The invention discloses a method for preparing pure beta-phase molybdenum carbide particles through one-step carbonization and application of the pure beta-phase molybdenum carbide particles. The preparation method comprises the following steps: (1) preparing molybdenum oxide powder by adopting a method for thermally decomposing a molybdenum metal compound; (2) dividing an organic matter precursor and the molybdenum oxide powder obtained in the step (1) into two stacks, and respectively placing the two stacks on the ventilation side and the exhaust side of a tubular furnace; and (3) introducing carrier gas into the tubular furnace, and carbonizing the molybdenum oxide powder through a temperature programming process. According to the method, the carrier gas is utilized to deliver the gas-phase carbon source produced by thermal decomposition of the organic matter precursor to directly react with the solid-phase molybdenum oxide powder, the carbonization process can be efficiently achieved, high-purity beta-phase molybdenum carbide is obtained through one-step carbonization, high-value and high-risk hydrocarbon gas such as methane and propyl alcohol or alcohol steam is avoided, and the method is suitable for industrial production. The problems of carbon deposition on the surface of the molybdenum carbide caused by using the carrier gas as a carbon source and the like can be avoided, and the preparation method is simple, relatively mild in reaction condition, low in raw material cost, simple and easy to obtain and suitable for large-scale production, popularization and application.

The invention provides an anti-inflammatory and / or acne-removing and / or oil-controlling and / or antioxidant and / or slow-release whitening composition, which comprises resveratrol, a hydroxyl derivative thereof, an acetylated derivative thereof or a salt thereof. The invention provides application of resveratrol, a hydroxyl derivative thereof, an acetylated derivative thereof or a salt thereof in preparation of drugs, cosmetics or skin care products for resisting inflammation and / or removing acnes and / or controlling oil and / or resisting oxidation and / or slowly-releasing and whitening. The invention provides a preparation method of a resveratrol acetylated derivative. The inventor finds that the resveratrol, the hydroxyl derivative, the acetylated derivative or the salt of the resveratrol show potential application prospects in the field of skin care products with the effects of resisting inflammation, removing acnes, controlling oil, resisting oxidation and / or slowly-releasing and whitening and the like.

The present invention proposes a method for stripping a large-area, few-layer two-dimensional material and preparing an electronic device. In the present invention, when preparing a two-dimensional material, a PVA layer is prepared on the surface of a substrate; an adhesive is used to stick a single crystal block to obtain an adhesive with a two-dimensional material attached; the adhesive is attached to the substrate so that the two-dimensional material is in contact with the PVA layer; the substrate is heated, and the adhesive is torn off to obtain a substrate with a large-area, few-layer two-dimensional material attached. In the present invention, when preparing a two-dimensional material, a PVA layer is spin-coated on the substrate as an auxiliary layer, and the flat surface and strong adhesiveness of the PVA layer are utilized to strip off a large-area, nanometer-level, few-layer two-dimensional material on the substrate with the PVA layer, and the stripping process is clean without damaging the two-dimensional material.

The present invention relates to a self-healing hydrogel and a preparation method thereof, and belongs to the technical field of biomedical hydrogels. A self-healing hydrogel, wherein the hydrogel is formed by cross-linking two matrices of polyacrylamide and dopamine hydrochloride modified hyaluronic acid through hydrogen bonding and conjugation of polyphenol compounds to form a hydrogel. The present invention provides a method for preparing a polyphenol injectable self-healing hydrogel that promotes wound healing under mild conditions and a simple preparation method. The wound adhesive hydrogel material provided by the present invention has antibacterial properties. When Escherichia coli and Staphylococcus aureus are used as pathogenic bacteria, the hydrogel exhibits excellent antibacterial ability. At the same time, it also has antioxidant and antibacterial properties, can inhibit wound infection, remove free radicals, and limit inflammatory reactions on the wound.