47 results about "Two-dimensional polymer" patented technology

A polymeric composition that generates nitric oxide and a process for rendering the surface of a substrate nonthrombogenic by applying a coating of the polymeric composition to the substrate are disclosed. The composition comprises: (1) a crosslinked chemical combination of (i) a polymer having amino group-containing side chains along a backbone forming the polymer, and (ii) a crosslinking agent containing functional groups capable of reacting with the amino groups; and (2) a plurality of nitric oxide generating functional groups associated with the crosslinked chemical combination. Once exposed to a physiological environment, the coating generates nitric oxide thereby inhibiting platelet aggregation. In one embodiment, the nitric oxide generating functional groups are provided by a nitrated compound (e.g., nitrocellulose) imbedded in the polymeric composition. In another embodiment, the nitric oxide generating functional groups comprise N₂O₂⁻ groups covalently bonded to amino groups on the polymer.

Disclosed are a catalyst composite including a metal; and a nitrogen-containing porous 2D polymer carrier, and a method of manufacturing the catalyst composite. Accordingly, provided is a high-efficiency catalyst composite that does not depend on pH acid concentration using a nitrogen-containing porous two-dimensional (2D) polymer carrier and a low-cost metal.

The invention discloses a method for densifying FOX-7 explosives induced by lattice intercalation, and relates to the technical field of preparing novel composite materials. The method aims at the shortage of low FOX-7 lattice stacking density, and selects a high-nitrogen two-dimensional material as intercalation molecule to obtain a kind of two-dimensional material intercalation modified FOX-7-based new high-density explosive. The method comprises the following steps: step 1: adding an organic solvent into high-nitrogen two-dimensional polymer monomer material and 1,1-diamino-2,2-dinitroethylene (FOX-7) according to a certain ratio and a certain concentration, heating to a certain temperature; step 2, adding that organic aldehyde solution into the hot solution of the step 1, maintaining the temperature of the step 1, and reacting for a certain time at a certain stirring rate; step 3, adding antisolvent with the volume equal to that volume of the solvent in the step 2 to precipitate the product; after centrifugation and drying of the product, obtaining the high density FOX-7 matrix composite.

The invention provides a preparation method for a two-dimensional organic material with an adjustable pore diameter. 1,3,5-triaminobenzene, 1,4-dibromo-benzene and other monomer molecules are selectedfor preparing a two-dimensional polymer on the surface of a two-dimensional cuprous chloride nanocrystal material which has the effects of a template and catalysis. In the method, the two-dimensionalpolymer material is beneficial to large-area growth, and the method has the advantages that preparation is easy, costs are low, and industrialized and batched production is easy; the two-dimensionalorganic skeleton material with the adjustable pore diameter can be prepared, and the method is applied to different application fields with high demands for the pore diameter.

A preparation method of a 2D oxygen reduction catalyst Fe3O4@FeNC nanosheet comprises the steps of firstly dispersing graphene oxide in water, then adding a pyrrole monomer and an oxidant ferric chloride to obtain a graphene-polypyrrole two-dimensional polymer, and adding a proper amount of ferric chloride to the obtained two-dimensional polymer. A two-dimensional carbon material is obtained by pyrolyzing a two-dimensional polymer and ferric chloride mixture, is activated by adding potassium hydroxide, and is subjected to sulfuric acid pickling and secondary carbonization to obtain the 2D oxygen reduction catalyst Fe3O4@FeNC nanosheet. The 2D-Fe3O4@FeNC nanosheet prepared by the invention has high oxygen reduction activity, high methanol tolerance and high stability, is an ideal oxygen reduction catalyst, and is potentially applied to energy storage and conversion devices.

A family of new and novel molecules for mechanically superior two-dimensional (2D) polymers is described herein. By combining stiff carbon-containing cyclic polymer nodal units with more compliant linear polymer bridge units in an ordered, 2D repeating molecular structure it is possible to tailor the mechanical properties of 2D polymers and their assemblies to provide high stiffness, strength, and toughness. Furthermore, the inherent dimensionality of 2D polymers and their ability to be stacked into ordered and chemically interactive ensembles gives them inherent benefits in a variety of barrier and structural applications over current stiff and strong linear polymer technologies.

The invention discloses a polyolefin-based high-barrier film with a renewable structure and a preparation method of the polyolefin-based high-barrier film, and belongs to the technical field of polymer processing. According to the method disclosed by the invention, a dispersed phase polymer A in the polyolefin film is subjected to in-situ deformation through a specific two-way stretching process to generate a huge amount of two-dimensional sheet structures, so that the diffusion paths of small molecules in the film are increased, and the gas permeability coefficient of the film can be reduced by 1-2 orders of magnitude. A two-dimensional filler and an in-situ formed two-dimensional polymer A are bridged to form a barrier network, and the barrier network has a special effect of cooperatively blocking gas small molecules. According to the prepared high-barrier packaging material, a special microstructure with a macroscopic single layer, a microcosmic multi-layer and multi-component structure is creatively obtained in situ, the structure endows the material with excellent gas barrier performance, and the high-barrier packaging material can be obtained again through melt processing of the preparation method disclosed by the invention after forming. The high-barrier packaging material is easy to recycle and has a very good application prospect.

The invention discloses a preparation method of a two-dimensional anion exchange polymer and a membrane thereof, and relates to the technical field of polymer chemistry and fuel cell anion exchange membranes. The preparation method comprises the following steps: (1) designing and synthesizing a quaternary ammonium monomer suitable for two-dimensional self-assembly polymerization; (2) carrying out self-assembly on a quaternary ammonium salt monomer in an aqueous solution of a polar solvent to obtain a two-dimensional supramolecular aggregate solution; (3) adding a free radical initiator into the two-dimensional supramolecular aggregate solution, filling nitrogen to remove oxygen, and performing free radical polymerization reaction to obtain a two-dimensional polymer; and (4) carrying out solution casting on the two-dimensional polymer to obtain the two-dimensional anion exchange polymer membrane. The invention also provides the anion exchange polymer membrane prepared by the method. The preparation method has the beneficial effects that the surface of the formed two-dimensional polymer sheet layer contains a large number of quaternary ammonium hydrophilic groups, so that an ion channel is easy to form, and efficient conduction of anions in the membrane is facilitated.

The present invention belongs to the field of film preparation, and relates to especially surface adsorption and spontaneous polymerization process of preparing extra-thin polymer film. On the surface of substrate of solid with lattice structure, ultra-thin organic monomer film is first formed and then polymerized to form the polymer film. The said preparation process can form large-area ultra-thin ordered polymer film, and when proper substrate-monomer system is used, quasi-2D ordered polymer film of the thickness of several molecules or even single molecule may be prepared.The said ultra-thin ordered polymer film may be used as substrate and medium for photoelectronic functional devices, and has huge application value in nano electronic device, molecular electronic device, single electronic device and quantum electronic device.

The present invention relates to a crystalline, two dimensional polymer of Formula I and a process for the preparation thereof.

The invention relates to a preparation method of a two-dimensional transverse polymer heterojunction visible-light response catalytic hydrogen production material and application thereof. A phenanthrene polymer semiconductor plane is grafted to a graphite phase carbon nitride plane through a high-temperature thermo-polymerization method; as a phenanthrene polymer semiconductor is matched with a graphite phase carbon nitride semiconductor energy band to form a heterojunction structure, and a built-in field is formed at a boundary of heterojunctions to promote dissociation of light excitons, thephotocatalytic performance of a graphite phase carbon nitride material is improved; meanwhile, both the phenanthrene polymer semiconductor and graphite phase carbon nitride are visible-light responsecatalysts and are polymer conjugate materials; a pi-pi conjugate exists along a heterojunction plane, so that photon-generated carriers can be transmitted faster in a pi-pi conjugate system, and thetwo-dimensional polymer heterojunction material achieves higher light exciton dissociation efficiency and carrier transmission rate. The method has the advantages of a simple process, low cost, shortperiod, visible-light response and the like, and the finally formed two-dimensional transverse polymer heterojunction photocatalytic material is excellent in photocatalytic hydrogen production performance.

The invention provides synthesis of a two-dimensional coordination polymer based on a structure inducer. The powder X-ray diffraction peak positions of the coordination polymer are as follows: 10.06+/-0.5, 11.85+/-0.5, 26.55+/-0.5, 27.97+/-0.5, and 36.12+/-0.5, a 2theta angle range is between 5 DEG-60 DEG. The invention provides the two-dimensional coordination polymer based on the structure inducer, which uses amphoteric pyridinium oxygen negative ions as the structure inducer, and transition metal copper ions and benzene tertacarbonic acid are coordinated to form a novel two-dimensional coordination polymer. A two-dimensional coordination polymer film is obtained by ultrasonic stripping; the two-dimensional polymer film has molecular screening performance and can selectively screen Rhodamine B; the special dye organic matter in water can be separated, and the water body can be purified; the molecular screening method is more efficient by comparing with photolysis of an organic dye inthe water body, the secondary pollution caused by the decomposition of organic dye can be avoided, the raw materials are cheap and easy to obtain, and the reaction conditions are mild, which is beneficial to industrial production.

The invention discloses a photoelectric synapse device based on an organic-inorganic heterojunction, and a preparation method and application thereof. The device sequentially comprises a bottom electrode, an oxide layer, a polymer layer and a top electrode from bottom to top, the oxide layer is a zinc oxide nano array prepared by a hydrothermal method, and the polymer layer is a two-dimensional conjugated microporous polymer prepared by a solution method. Due to the fact that the zinc oxide nano array and the polymer have strong light absorption performance in ultraviolet and visible light wave bands respectively, the zinc oxide nano array and the two-dimensional polymer are assembled layer by layer, and the constructed organic-inorganic two-dimensional heterojunction can achieve light absorption in the range from ultraviolet to visible light. The device can change the carrier concentration and the current intensity by adjusting the illumination time/intensity, and further can simulate the current enhancement effect and the empirical learning behavior after excitatory synapse in the human brain. The photoelectric synapse device based on the organic-inorganic heterojunction prepared by the invention has the performance advantages of broadband response, easiness in preparation, low cost, low power consumption, high stability and the like.

The invention belongs to the technical field of nano-materials, and particularly relates to a preparation method of a two-dimensional polymer core-shell structure nanowire network coating. The preparation method includes the steps: firstly, forming nanowires in protonated water and good solvent solution by amphiphilic block polymer poly (ethylene glycol)-b-poly (4-vinylpyridine) (or hydrophobic amine polymer) and DNA (deoxyribonucleic acid), performing centrifugal purification and dissolving the nanowires in methanol solution; dropwise adding the nanowire methanol solution to the surface of asubstrate, rapidly spreading the methanol solution to cover the surface, spreading the nanowires in the methanol solution along with the solution and then spinning and volatilizing redundant solutionto form the uniform nanowire network coating. The preparation method of the polymer nanowire network coating is simple and efficient, coatings can be formed on different surfaces, and a new prospect is provided for modification of different surfaces and preparation of composite two-dimensional materials.

The invention discloses a renewable high-barrier polyester packaging material and a preparation method thereof, and belongs to the technical field of polymer processing and modification. According to the method, a polyester A and a polymer B are subjected to compatibilization modification, the technical problem that the barrier property is poor due to compatibility of the two components is solved, the polymer B of a dispersed phase forms a huge two-dimensional sheet structure in situ by cooperatively controlling a specific two-way stretching process, the diffusion path of gas small molecules in the film is greatly increased, the gas permeability coefficient can be reduced by 1-2 orders of magnitude, and the two-dimensional filler and the in-situ formed two-dimensional polymer B are bridged to form a barrier network, so that the renewable high-barrier packaging material with a macroscopic single-layer, microcosmic multi-layer and multi-component special microstructure is prepared, and the high-barrier packaging material can be obtained again through melt processing by the method after molding, is easy to recycle, and has essential difference and remarkable progress compared with a traditional multi-layer composite film.

The invention provides a fluorescent star polymer, and a preparation method and application thereof. The structural formula of a repeating unit of the polymer is shown in a formula I or a formula II,wherein the structural formulas of the formula I and the formula II are as shown in the specification. In the formula I, R and R' are both alkyl groups, and the number of carbon atoms in each of R andR ' is 6-14; and in the formula II, R is an alkyl group, and the number of carbon atoms in R is 6-14. The polymer is a two-dimensional polymer net structure with benzo[1,2-b: 3, 4-b': 5, 6-b'']trithiophene (TTB) and fluorene or carbazole as structural units, is high in response speed, good in selectivity and high in sensitivity, can provide beneficial help for a chemical explosive fluorescence detection technology, and can also be applied to the fields of light emitting diodes, biological imaging, sensors and the like.

The invention discloses a nitrogen-containing two-dimensional polymer film, the general formula of a structural unit of the film is shown in the specification, or a preparation method of the polymer film comprises the following steps: 1, dissolving a cyanuric chloride monomer in an organic solvent which is insoluble with water to obtain an organic solution; 2, dissolving alkali and amine monomersin water to obtain an alkaline solution, and freezing the alkaline solution; and 3, placing the organic solution on an iced alkaline solution to form an interface, performing standing for 1-60 days atthe icing temperature of the alkaline solution to generate the nitrogen-containing two-dimensional polymer film at the interface, and melting the iced alkaline solution to obtain the nitrogen-containing two-dimensional polymer film. The polymer film is large in transverse dimension and small in thickness, can be used for preparing a field effect transistor, and can also be used as a catalyst forhydrogen production by electro-catalytic water splitting. The preparation method of the polymer film is mild in condition and simple to operate.

A material having a two-dimensional structure can have high strength properties.

The present invention provides two-dimensional polymers P1 and P2 of pyromellitic diimide and hexaamino benzene and derivatives thereof, from monomer of Formula (M), which are used to synthesize composites for supercapacitor applications. M