8results about How to "Recyclable" patented technology

This invention relates to a MIL-100(Fe)-derived ErFeO3 / α-Fe2O3 gas-sensitive material, its preparation method, and its application, belonging to the field of gas sensor and environmental monitoring technology. A method for preparing a MIL-100(Fe)-derived ErFeO3 / α-Fe2O3 gas-sensitive material involves: slowly adding FeCl3 solution dropwise to H3BTC solution at room temperature; after uniform mixing, maintaining the mixture at 150℃~210℃ for 20 hours in a reaction vessel to obtain an orange-red substance; washing and drying to obtain MIL-100(Fe); dispersing the obtained MIL-100(Fe) in methanol; dissolving Er(NO3)3·6H2O in the above solution and reacting for a period of time; washing, centrifuging, and drying; transferring the obtained product to a muffle furnace and calcining under an oxygen atmosphere to obtain the ErFeO3 / α-Fe2O3 gas-sensitive material. The method for preparing porous metal oxide-based gas-sensitive materials using MOF materials as precursors and rare earth element modification proposed in this invention has advantages such as versatility, controllability, and recyclability compared to traditional methods for preparing metal oxide-based gas-sensitive materials.

The application discloses gold nanoparticle loaded polycrystal face zinc oxide photocatalyst and a preparation method and application thereof, relates to the fields of catalyst preparation and photocatalysis technology. By means of hydrothermal method and calcination treatment, ZnO nanorods and ZnO nanosheets exposing different crystal faces are prepared by controlling the amount of surfactant; finally, gold nanoparticles are loaded on the ZnO by means of photoreduction method to construct Au-ZnO material. The preparation method disclosed by the application can realize efficient and high-selectivity photocatalytic CH4 oxidation coupling to prepare C2H6 at normal temperature and pressure, meets the requirements of sustainable development energy strategy, and has wide application prospect. By the above method, ZnO nanorods mainly exposing 0110 / 1010 crystal faces and ZnO nanosheets mainly exposing 0001 crystal faces are synthesized, and the performance is optimized by specific crystal face regulation, so that the efficiency of methane oxidation coupling is greatly improved.

The application provides a degradable blood vessel occluder and an occlusion method, which comprise a delivery tube and an extraluminal locker. The distal end of the delivery tube is provided with an occlusion balloon, which is used to tightly adhere to the blood vessel wall inside the puncture port after being inflated inside the blood vessel. The extraluminal locker is slidingly assembled outside the delivery tube. The occlusion wool inside the extraluminal locker slides along the delivery tube. The occlusion wool is pushed to the puncture port by the extraluminal locker and is used to occlude the puncture port. The application adopts the intravascular occlusion balloon positioning and the degradable occlusion wool to cooperatively stop bleeding inside and outside. The inflated balloon realizes the accurate positioning and temporary occlusion of the inside of the puncture port, effectively reduces the risk of occlusion wool internal leakage and blocks the blood vessel, the implanted part adopts the completely degradable material, and the body fluid can be safely metabolized in the blood vessel and skin healing process. There is no metal residue, and there is no need for secondary surgery to extract, which effectively realizes the occlusion of the large-diameter (including small-diameter) blood vessel puncture port.

The present application relates to a bimetallic covalent organic framework material and a preparation method and application thereof, and belongs to the technical field of coordination polymer materials. The technical problem solved by the present application is to provide a bimetallic covalent organic framework material M1TPP-M2QL-COF. The structural formula of the material is shown in the formula. The bimetallic covalent organic framework material obtained by the present application has an ultra-long lifetime exciton of 36000 picoseconds; it can be used as a photocatalytic catalyst and exhibits excellent photocatalytic defluorination and debromination performance on o-dibromide, has a significant conversion efficiency and separation yield in a wide range of substrates, the highest conversion efficiency is 99%, and the catalyst has recyclability. The preparation method of the bimetallic covalent organic framework material of the present application not only realizes a metal occupancy rate of nearly 100% at a predetermined position, but also allows independent coordination of a bimetallic center without structural interference. The process is simple, raw materials are easy to obtain, and large-scale industrial production is possible.

This invention relates to a method for preparing and applying a superhydrophobic expanded graphite coating. The invention addresses the problems of complex preparation processes, high costs, or insufficient mechanical stability in existing technologies. The method uses expanded graphite as the main raw material and adds epoxy resin to prepare a superhydrophobic expanded graphite coating with photothermal properties. The coating is uniformly sprayed onto the surface of circular nickel foam using a spraying technique, resulting in a multifunctional superhydrophobic expanded graphite photothermal evaporator with sustainability, corrosion resistance, recyclability, self-cleaning capabilities, and water purification abilities. This invention belongs to the field of superhydrophobic coating preparation technology.

The application discloses a preparation method of a recyclable and easy-to-repair epoxy resin, and the recyclable and easy-to-repair epoxy resin is prepared from an epoxy resin containing a borate ester structure or a mixed resin composed of the epoxy resin containing the borate ester structure and a conventional epoxy resin after curing; the structural formula of the epoxy resin containing the borate ester structure is shown in the following formula (I), wherein R is selected from one or more of the following formula (II-1), (II-2) and (II-3); the preparation method disclosed by the application is suitable for conventional types of epoxy resins in the field and has universality; and the prepared product has recyclability and repairability and also has high strength.

This invention belongs to the field of functional adsorbent technology, specifically relating to a high-capacity coconut shell activated carbon adsorbent and its preparation method. The adsorbent comprises the following raw materials by weight: 80-90 parts coconut shell activated carbon, 5-15 parts mesoporous composite material, 1-6 parts aromatic donor, 0.3-1.2 parts sodium nitrite, and 1 part acidifier. The mesoporous composite material has both mesoporous mass transfer channels and polar trapping functions, which can improve the diffusion conditions of organic molecules and enhance the adsorption driving force for polar components such as aldehydes and ketones. The adsorbent has a high adsorption capacity and bed utilization efficiency for multi-component organic matter in petrochemical plant gas at normal temperature and pressure, and is suitable for the efficient adsorption and recovery of organic matter.

The application discloses a sulfur-based supramolecular polymer adhesive as well as a preparation method and application thereof. The preparation raw material of the sulfur-based supramolecular polymer adhesive comprises sulfur and / or sulfur derivatives and water-soluble cyclodextrin and / or water-soluble cyclodextrin derivatives. The preparation method comprises the following steps: uniformly mixing sulfur and / or sulfur derivatives with water-soluble cyclodextrin and / or water-soluble cyclodextrin derivatives to obtain a powder mixture; and melting and cooling and standing the powder mixture to obtain the sulfur-based supramolecular polymer adhesive. The sulfur-based supramolecular polymer adhesive has the advantages of temperature responsiveness, recyclability, variable adhesive strength and wet adhesion performance, can be prepared on a large scale at high temperature through simple mixing, can be used for bonding soft, hard and various substrate materials, is suitable for biomedical tissue adhesion, and can be used in liquid environments such as underwater or under oil.