11 results about "Polymeric Macromolecules" patented technology

The invention discloses a recoverable high-enthalpy-value solid-solid phase change material and a preparation method thereof. Solid phase constraint of a liquid phase change material is achieved through a topological entanglement effect generated by a hydrogen bond network and polymer macromolecules. The coupling effect of the two limits the movement between low-molecular-weight phase change material molecules at the phase change temperature, and high-temperature solid-solid phase transformation is achieved. The solid-solid phase change material prepared by the method has a high enthalpy value and also has recoverability. In addition, due to the excellent light absorption capacity of the graphene oxide sheet, the graphene oxide sheet has a potential excellent function in the aspect of solar photo-thermal conversion.

This invention relates to the field of perovskite solar cell technology, specifically to a high-efficiency inverted perovskite solar cell and its fabrication method. The fabrication method includes the following steps: spin-coating a self-assembled monomolecule solution onto a first region on the surface of a conductive substrate, followed by annealing to form a hole transport layer; spin-coating a perovskite precursor solution onto the surface of the hole transport layer; during spin-coating, adding a chemical passivation solution to the coated surface and annealing; spin-coating a field passivator solution onto the annealed perovskite film surface, followed by annealing to form a perovskite active layer; spin-coating a mixed solution of fullerene and fullerene derivatives onto the surface of the perovskite active layer, followed by spin-coating an organic small molecule solution to form an electron transport layer; and fabricating electrodes on the electron transport layer and a second region on the surface of the conductive substrate; the chemical passivation solution is a polymer macromolecular material solution, and the field passivator solution is a small molecule material solution. The high-efficiency inverted perovskite solar cell of this invention significantly improves photoelectric conversion efficiency.

This invention belongs to the field of polymer materials technology and discloses a high-temperature resistant, high-transmittance nylon copolymer, its preparation method, and its applications. Terephthalic acid, isophthalic acid, 1,4-cyclohexanedicarboxylic acid, and hexamethylenediamine are selected as raw materials. The preparation process uses deionized water as a solvent, mixing all raw materials and solvent in a specific ratio and adding them to a reaction vessel. Through copolymerization, a nylon copolymer is formed. This nylon copolymer, due to the introduction of rigid benzene rings and aliphatic six-membered ring structures into the amorphous polymer PA6I macromolecule, maintains high transmittance while increasing the material's heat resistance. This invention sets technical indicators in the copolymerization salt formation process, ensuring controllable copolymer salt quality and minimizing the impact of copolymer salt quality issues on subsequent polymerization. No additional catalysts or antioxidants are required during preparation, reducing production costs. Furthermore, the preparation process does not require maintaining high temperatures and pressures, facilitating industrialization while reducing production costs.

Provided herein are macromolecular structures comprising a surface, tethered moiety, and a macromolecular chain, compositions thereof, and methods of making the same. Also provided herein are systems and kits comprising the macromolecular structures.

The invention belongs to the technical field of PTFE membrane modification, and particularly relates to a multifunctional fluorinated copolymer, a PTFE microporous hydrophilic membrane and a preparation method. The multifunctional fluorinated copolymer comprises the following raw materials: a fluorine-containing monomer, a functional monomer and a hydrophilic monomer, wherein the fluorine-containing monomer and the functional monomer are subjected to a ring-opening reaction firstly, and then the fluorine-containing monomer and the hydrophilic monomer are subjected to a free radical copolymerization reaction to prepare the multifunctional fluorinated copolymer. The multifunctional fluorinated copolymer product disclosed by the invention can be regarded as a fluorocarbon surfactant with a comb-shaped structure, and can be firmly adhered to the surface of the PTFE microporous membrane through hydrophobic interaction of a fluorocarbon chain and Van der Waals force of polymer macromolecules, so that the hydrophobicity of the PTFE microporous membrane can be effectively improved, and hydrophilic modification of the PTFE microporous membrane is realized.

The present disclosure relates to compositions of matter, methods, and systems for analyzing polymeric macromolecules, including polymeric macromolecules such as peptides, polypeptides, and proteins.

The present disclosure relates to compositions of matter, methods, and systems for analyzing polymeric macromolecules, including polymeric macromolecules such as peptides, polypeptides, and proteins. Some such embodiments include recoding the polymeric macromolecule into nucleic acid sequences. Some steps may be performed in solution without a surface anchor.

The invention belongs to the field of preparation of high-reaction-activity isobutylene-based polymers, and relates to a high-reaction-activity isobutylene-based polymer and a preparation method thereof. The polymer comprises an isoolefin structural unit and a structural unit derived from a non-conjugated alkylene styrene compound, and the molar content of the structural unit derived from the non-conjugated alkylene styrene compound is 1-20% based on the total molar weight of all the structural units in the polymer; the polymer macromolecular chain contains external double bonds at the side group and the end group, and the average functionality of the external double bonds is not less than 1.0; the number-average molecular weight of the high-reaction-activity isobutene-based polymer is 500-6500 g / mol, the molecular weight distribution is narrow, and the distribution index can reach 1.3. The isobutene-based polymer with narrow molecular weight distribution and high reaction activity is directly prepared by a one-step method, side groups and end groups of the isobutene-based polymer contain external double-bond functional groups in a molecular chain, and the average external double-bond functionality is not less than 1.0.

The invention provides high-fluidity nylon 66 resin as well as a preparation method and application thereof, and the high-fluidity nylon 66 resin is prepared from the following raw materials: hexamethylenediamine, adipic acid, a hyperbranched oligomer / polymer, a catalyst and a solvent, wherein the hyperbranched oligomer / polymer is any one or a combination of at least two of a polyamide-amine dendritic polymer, four-arm polyethylene glycol and a star polyethylene oxide polymer. The hyperbranched oligomer / polymer is introduced into the molecular structure design of the high-fluidity nylon 66 resin, the microstructure is improved, and the interaction force between polymer macromolecules can be weakened, so that the fluidity of the resin is greatly improved and the application range is expanded under the condition of keeping the high molecular weight of the resin, namely the same level of the relative viscosity of the resin; and moreover, excessive crosslinking is avoided, better mechanical properties are still kept under high fluidity, mobility caused by adding excessive lubricant and other flow improving auxiliaries is avoided, and the long-term stability is improved.

The invention belongs to the technical field of oil and gas well reservoir transformation, and particularly relates to a temporary plugging material for shale gas diversion fracturing, a preparation method and a temporary plugging agent. The temporary plugging material for shale gas diversion fracturing is prepared from the following raw material components in parts by weight: 35 to 45 parts of acrylamide, 0.2 to 1.5 parts of N-vinyl pyrrolidone, 0.1 to 1 part of polydipentaerythritol hexaacrylate and 100 parts of deionized water. The rigid group N-vinyl pyrrolidone in the molecular structure of the temporary plugging material improves the temperature resistance of the product, and the polyacrylate serving as the cross-linking agent forms multi-branched polymer macromolecules, so that the product has the properties of high temperature resistance, high pressure difference resistance and easiness in degradation. Compared with a conventional temporary plugging material, the temporary plugging material has better effects in the aspects of production cost, temperature resistance, pressure resistance and degradability, and can be suitable for temporary plugging diversion fracturing construction of deep and ultra-deep shale reservoirs.

The invention discloses modified hollow glass beads, which are prepared from the following raw materials: hollow glass beads, a solvent, an alkaline pretreatment solution, an acid-base regulator and a silane coupling agent, and the silane coupling agent is a non-reactive long-chain alkyl silane coupling agent. The non-reactive long-chain alkyl silane coupling agent is adopted to modify the surfaces of the hollow glass beads, so that the compatibility and dispersity of the hollow glass beads in an organic silicon system are remarkably improved, and the curing reaction of an organic silicon polymer is not influenced. A non-reactive long-chain alkyl silane coupling agent is selected, and a long and flexible molecular chain can be inserted between polymer macromolecular chains, so that the intermolecular acting force is weakened, the movement capability of a chain segment is improved, the hardness and modulus of the material are reduced, and the flexibility and the elongation are improved.