12 results about "Two-dimensional polymer" patented technology

The invention discloses a preparation method of a Schiff base two-dimensional polymer / cellulose nanofiber heterogeneous ion channel membrane based on an interface super-assembly strategy. Melamine (MA) and benzenetricarboxaldehyde (BTCA) serve as raw materials, two-dimensional polyimide (2DPI) is synthesized through a Schiff base reaction, then the two-dimensional polyimide (2DPI) is stripped into a nanosheet dispersion under the assistance of trifluoroacetic acid (TFA), then the nanosheet dispersion is mixed with a DMSO dispersion of cellulose nanofibers (CNF), and the 2DPI / CNF composite membrane is obtained through super-assembly on a nylon membrane through vacuum-assisted filtration. The prepared composite membrane has good flexibility, water stability and cation selectivity, the 2DPI content is adjustable, and the composite membrane is suitable for nano-fluid devices. The preparation method is simple to operate and low in cost, and a novel ion channel material is provided for the fields of osmotic energy conversion and the like.

The present disclosure relates to a two-dimensional polymeric fullerene and preparation method thereof, wherein the preparation method includes the following steps: providing metal intercalated polymeric fullerene; replacing metal ions in the metal intercalated polymeric fullerene with quaternary ammonium salts. The preparation method of the two-dimensional polymeric fullerene of an embodiment of the present application has simple process and low cost, which can achieve large-scale preparation of two-dimensional polymeric fullerene.

The present invention relates to a method for the synthesis of a two-dimensional or quasi-two-dimensional polymer comprising a surfactant, the two-dimensional or quasi-two-dimensional polymer film and the use for the production of membranes, electronic devices or catalysts.

The invention belongs to the field of organic synthesis, and particularly relates to a connector of a two-dimensional polymer, a monomolecular layer assembling method of the connector and a two-dimensional molecular preassembly. The linker is a molecule comprising a linker molecular core and at least one linking group; the linking group comprises at least one first type of functional group combined with the two-dimensional polymer, and the linker molecule at least comprises two first type of functional groups; the bonding at least comprises chemical bonding; the connectors and the two-dimensional polymers are combined in any number to form a layered polymer, and the thickness of the layered polymer is two times smaller than that of a single two-dimensional polymer. The connector disclosed by the invention can be universally suitable for assembling and combining almost all two-dimensional polymer molecules to construct a required two-dimensional assembly and / or a pre-assembly, and can be used for simultaneously assembling different types of two-dimensional polymer molecules to construct a novel composite two-dimensional molecular assembly to realize functionalization; and the method has wide universality, effectiveness and high efficiency.

This application discloses a two-dimensional polymer thin film based on reactive diffusion theory, its preparation method, and its applications. The film exhibits a typical bilayer structure: the lower layer is a continuous and dense covalent organic framework substrate film with good crystallinity; the upper layer is a cyclic / honeycomb Turing structure formed by the orderly assembly of nanoparticles, exhibiting strong periodicity and high uniformity. The preparation method employs gas-liquid interface reactive diffusion: the monomer is dissolved in a mixed solvent of DMF and chlorobenzene, and acetic acid is used as a catalyst, which is then dropped onto the surface of deionized water. By controlling the monomer concentration (5 mg / mL), molar ratio (2:3), drop volume (15 μL), and diffusion resistance, the Turing structure can be precisely controlled. This invention features a mild process, can be used for large-area preparation, and produces thin films with regular structures and excellent stability. It can be directly applied to flexible electronics, membrane separation, sensing, and catalysis, effectively solving the technical bottlenecks of uncontrollable morphology, low crystallinity, and difficulty in large-scale production of traditional two-dimensional polymer thin films.

The application discloses a kind of based on schiff base two-dimensional polymer composite membrane osmotic energy conversion device and its application.Schiff base two-dimensional polymer composite membrane is schiff base two-dimensional polymer / cellulose nanofiber composite membrane, which is prepared by interfacial superassembly strategy, has double nano ion channel and adjustable surface charge characteristics.The composite membrane is assembled between double conductivity cell, and the ion transport and osmotic energy conversion performance are tested under the concentration gradient of simulated seawater (0.5 M NaCl) and river water (0.01 M NaCl).It has a high output power density of 5.62 W / m 2 , and has good durability and cycle stability.The application provides a new intelligent nanochannel platform for efficient capture of blue osmotic energy.

The invention provides a dynamic micro-interface polymerization method of a two-dimensional polymer material and application of the dynamic micro-interface polymerization method in preparation of a quasi-solid electrolyte, and the dynamic micro-interface polymerization method comprises the following steps: adding a first reaction monomer into a solvent, and stirring to obtain a first monomer solution; adding a second reaction monomer into the solvent, and stirring to obtain a second monomer solution; adding the second monomer solution into the reaction container, injecting the first monomer solution into the second monomer solution under a stirring condition, and reacting to obtain a mixed system; and carrying out suction filtration, purification and drying on the mixed system to obtain the two-dimensional polymer material. According to the dynamic micro-interface polymerization method disclosed by the invention, a dynamic micro-interface reaction system with a huge specific surface area is constructed through external mechanical stirring, and a reaction place is expanded from a limited two-dimensional plane to a massive micron-scale interface in a three-dimensional space, so that the core defect of insufficient interface area in static interface polymerization is fundamentally overcome.

The invention belongs to the field of organic synthesis, and particularly relates to a two-dimensional polymer assembly capable of being assembled in a cross-layer mode, an assembling method of the two-dimensional polymer assembly and a two-dimensional polymer film. The two-dimensional polymer assembly is a monomolecular layer assembly comprising at least one complementary reactive functional group pair; the two-dimensional polymer assembly capable of cross-layer assembly is subjected to cross-layer assembly in the thickness direction through complementary reactive functional groups exposed on the upper surface and the lower surface; the cross-layer assembly mode comprises physical bonding and / or chemical bonding, and at least comprises one chemical bonding. The interlayer bonding stability of the multi-layer two-dimensional material and the stability of the whole material are essentially changed by changing the cross-layer assembly form / bonding form, high-degree-of-freedom structural design and / or functional design can be performed on the multi-layer two-dimensional material, and the method has wide universality, effectiveness and high efficiency; the application field of the existing layered two-dimensional material can be greatly expanded; and the use effect is improved.

The application discloses a kind of microporous metal organic framework materials and preparation and rare gas separation method, belong to chemical adsorption separation technical field, microporous metal organic framework material is made of divalent metal ion, heterocyclic dicarboxylic acid ligand and nitrogen-containing heterocyclic ligand coordination construction;Divalent metal ion and heterocyclic dicarboxylic acid ligand coordination forms two-dimensional polymer, nitrogen-containing heterocyclic ligand as pillar, by with two-dimensional polymer coordination forms three-dimensional framework structure.Microporous metal organic framework material is used as adsorbent, and is contacted with rare gas mixed gas phase, realizes to high polarity rare gas identification capture, reaches the separation and purification of rare gas.The present application realizes the accurate control of pore chemistry electrostatic environment by changing different ligand and its functional group substituent, so as to realize the selective separation of xenon / krypton and helium / neon and other rare gas.

The invention discloses a two-dimensional polymer building block. The two-dimensional polymer building block adopts a modular structural design of'molecular core-connecting arm-reactive group ', the molecular core is selected from a unit with a two-dimensional topological structure, and the edge or surface of the molecular core is modified with a first type of reactive group and a second type of reactive group. According to the building block, by utilizing specific pairing (such as nucleophilic-electrophilic reaction, click chemistry or light / heat initiation reaction) among reactive groups, a monomolecular layer assembly with uniform thickness and a covalent cross-linked polymer building block film with high stability can be constructed on a gas-liquid interface, a liquid-liquid interface or a substrate surface through physical pre-assembly and chemical bonding. According to the preparation method, polymerization and assembly processes are decoupled, so that the problems that a traditional two-dimensional polymer is difficult to process, has many defects and is weak in interlayer binding force are effectively solved, and controllable preparation of the large-area and high-quality two-dimensional functional film is realized.

Systems and methods for producing and using polymer based fixed targets for hydrated, room temperature, high-throughput serial protein crystallography with minimal background and minimal sample consumption are provided. The fixed targets can also be used with non-protein samples such as nanoparticle inorganic crystals. The targets maintain full crystal hydration that allows for on-chip crystallization as well as maintaining long term stability of the sample within the chip. The target chips are optimized to minimize background by controlling the sample thickness in the beam to match crystal size, enabling fast raster scanning at lower fidelity and high hit rates that facilitate dynamic measurements. The targets provide an inexpensive, flexible substrate for on-chip, micro-batch or vapor diffusion crystallization facilitated by polymer brushes for sample concentration and surface initiated crystallization thereby eliminating damaging crystal sample transfer.