58 results about "Polyrotaxane" patented technology

The invention relates to the technical field of conductive film substrate materials, in particular to a preparation method and application of a super-flexible stretchable conductive film substrate material. In order to solve the problems that an existing flexible conductive film is prone to fracture in the stretching process, a conductive layer is prone to stripping, and the conductive performance is seriously attenuated along with deformation, the invention provides a composite polyrotaxane enhanced matrix film which is capable of meeting the ultra-flexible and stretchable requirements. And an MXene-silver nanowire-polypyrrole ternary synergistic conductive network is combined, so that the problem that the conductivity is sharply attenuated in the deformation process is solved.

The invention belongs to the technical field of coating preparation, and provides a modified polysilane epoxy hybrid coating and a preparation method thereof. Firstly, a polyrotaxane silane additive containing cyclic molecules is prepared through a supramolecular self-assembly and chemical end capping technology, the additive forms a unique network after a coating is cured, mechanical stress can be effectively dissipated, and the coating is endowed with ductility; secondly, a controllable free radical polymerization method is adopted, an acrylate copolymer is synthesized, dynamic hydrogen bond units densely distributed on a side chain of the acrylate copolymer form an efficient energy absorption network, and impact energy can be absorbed and dissipated on the microscopic level; in the preparation process of the coating, the epoxy resin, the copolymer and the pigment filler are finely ground and then mixed with auxiliaries such as polyrotaxane silane to prepare a component A; and mixing amino silicon oil with an amine curing agent and a catalyst to prepare a component B. The prepared coating has excellent flexibility and impact resistance while keeping high weather resistance.

The application discloses a kind of annular spirofuran type polyurethane polyrotaxane and its preparation method, with rigid conjugated structure annular spirofuran derivative as macrocyclic host, with linear polyurethane chain as through axis molecule, and introduce end-capping group in polyurethane chain both ends, greater than annular spirofuran cavity, to constitute quasi wheelane of stable structure.Its preparation method mainly includes: first, synthesis of functionalized annular spirofuran macrocycle with through site;Then it is with isocyanate end-capped polyurethane prepolymer in solution by host-guest interaction and is penetrated to obtain target polyrotaxane.The material combines the rigidity, conjugation of spirofuran unit and the sliding crosslinking effect of polyrotaxane, and shows excellent thermal stability, mechanical properties and stimulus response characteristics.The polyrotaxane provided by the application is suitable for high-performance elastomer, intelligent shape memory material, damping material and optoelectronic functional composite material and the like fields.

An object of the present invention is to provide a composition having excellent surface impact strength and a method for producing a composition. The composition according to the embodiment of the present invention is a composition containing a cellulose derivative and a polyrotaxane, and is amorphous.

The invention relates to a secondary battery, a negative pole piece and an electric device. The secondary battery comprises a negative pole piece, the negative pole piece comprises a negative current collector and a conductive coating arranged on at least one surface of the negative current collector, the conductive coating comprises a conductive agent and a first binder, and the first binder comprises polyrotaxane.

This application relates to the field of polymer materials technology, providing a PET elastomer, composite material, dynamic covalent network polymer, and its preparation method and application. The elastomer is prepared by in-situ self-assembly of crown ether-primary amide dual-functionalized PET through melt blending. Its molecular network integrates a quasi-rotaxane supramolecular crosslinking network. This structure is formed by the host-guest interaction between the crown ether and the primary amide, and can act as a sliding crosslinking point to dissipate energy through the sliding of cyclic components. This application employs a two-step end-capping-in-situ self-assembly process to overcome the technical obstacles of low PET chain-end activity and poor compatibility between polyrotaxane and PET, achieving molecular-level dispersion of quasi-rotaxane in the PET matrix. This fully utilizes the molecular pulley effect to achieve breakthrough toughening of the elastomer. Simultaneously, it combines rigid nanofillers modified with aminosilane coupling agents to form a soft-hard synergistic network, enabling the PET composite material to maintain high toughness while simultaneously improving strength, modulus, and thermal properties.

The present application belongs to the field of mechanical color-changing materials, and relates to a kind of polyrotaxane and its preparation method and mechanical color-changing material that can respond to weak force instantly and application.Polyrotaxane includes molecular ring and molecular shaft, molecular ring is provided with luminescent molecular group, and molecular shaft is provided with quencher molecular group;The luminescent molecule of the luminescent molecular group can be quenched;Each of the polyrotaxane provides two crosslinking sites, one of which is located on the molecular shaft, and the other is located on the molecular ring or luminescent molecular group.The present application synthesizes polyrotaxane with luminescent quencher on the molecular shaft and luminescent molecules on the molecular ring as crosslinking components, uses multi-arm polymer as matrix material to obtain reticular polymer material, and makes the material not luminescent in the relaxed state through the luminescent quencher on the molecular shaft, and the material changes color instantly due to the separation of the quencher and the luminescent molecules once the material is subjected to external force, and returns to the original color after the external force is removed.

Provided is a pharmaceutical composition for use in inducing an antigen-specific immune response, the pharmaceutical composition comprising: a polyrotaxane having a plurality of macroring molecules, an axis molecule that penetrates the rings of the macroring molecules, and caps that bind to the ends of the axis molecule, in which at least some of the macroring molecules include an amine-containing group having a monovalent proton at neutral pH and a divalent proton at acidic pH; and an antigen.

The application discloses an epoxy resin polyrotaxane network lubricating material, a preparation method thereof and application of the epoxy resin polyrotaxane network lubricating material in preparation of biological lubricating materials. The epoxy resin polyrotaxane network lubricating material is obtained through ring-opening and curing reaction of a polyethylene glycol and cyclodextrin quasi-polyrotaxane, an epoxy resin monomer and a curing agent polyether amine. In the polyethylene glycol and cyclodextrin quasi-polyrotaxane, the molar ratio of the polyethylene glycol and the cyclodextrin is 1-100:1-2000; the molar ratio of the epoxy resin monomer, the curing agent polyether amine and the polyethylene glycol and cyclodextrin quasi-polyrotaxane is 100-2000:50-1000:0.1-200. The preparation method comprises the following steps: performing ring-opening and curing reaction of the polyethylene glycol and cyclodextrin quasi-polyrotaxane, the epoxy resin monomer and the curing agent polyether amine to obtain the epoxy resin polyrotaxane network lubricating material.

This invention discloses a polyrotaxane with controllable cyclodextrin coverage, its preparation method, and its applications, belonging to the field of polyrotaxane material technology. This invention involves dissolving α-cyclodextrin, 3-hydroxyadamantane-1-carboxylic acid, and polyethylene glycol diamine in deionized water and assembling them under cold conditions to form a quasi-polyrotaxane, which is then end-capped to obtain the polyrotaxane. The polyethylene glycol diamine is prepared from polyethylene glycol and N,N'-carbonyldiimidazole. The cyclodextrin coverage of the polyrotaxane is directionally controlled by adjusting the mass ratio of α-cyclodextrin to 3-hydroxyadamantane-1-carboxylic acid, the order of addition of 3-hydroxyadamantane-1-carboxylic acid, and the cold assembly time. Based on the mechanism of competition between 3-hydroxyadamantane-1-carboxylic acid and polyethylene glycol within the cyclodextrin cavity, this invention synthesizes polyrotaxanes with a cyclodextrin coverage of 0.5–2.5%, resulting in polymers with better extensibility and mechanical properties.

The invention discloses a temperature-sensitive type dendronized cyclodextrin polyrotaxane hydrogel and a preparation method thereof, relates to the field of hydrogel materials, and provides a dendronized cyclodextrin polyrotaxane with temperature responsiveness and reductive degradability through molecular design and synthesis, a three-dimensional cross-linked network is formed through a body [2 + 2] light ring addition reaction, and the temperature-sensitive type dendronized cyclodextrin polyrotaxane hydrogel is prepared. The method has the advantages that the operation is simple, the chemical pollution is avoided, the cyclodextrin coverage rate and the tree-shaped alkoxy ether element grafting rate are adjustable, and the prepared hydrogel has adjustable mechanical property, temperature responsiveness and reductive degradability, and can be used for preparing the dendritic cyclodextrin polyrotaxane hydrogel material. The prepared temperature-sensitive type dendronized polyrotaxane hydrogel has a potential application value in the field of biomedical materials.

The invention belongs to the technical field of high polymer materials, and provides a slip ring grafted polyrotaxane multi-block topological copolymer as well as a preparation method and application thereof. The topological copolymer comprises a multi-block copolymerized main chain and a plurality of cyclic molecules grafted with polyester side chains, the cyclic molecules and the main chain form a mechanically interlocked polyrotaxane topological structure, and the cyclic molecules are limited by block steric hindrance outside the main chain and freely slide along blocks inside the main chain; and the main chain outer block and the slip ring grafted polyester side chain are incompatible chain segments with different polarity and / or crystallization thermodynamics. According to the preparation method, polyether, cyclodextrin or a derivative thereof and a polymeric monomer are used as raw materials, and the preparation method is completed through a one-pot reaction of assembling and step-by-step polymerization. The topological copolymer can respectively form physical interpenetration in two phases of a microphase separation system through an incompatible chain segment, and utilizes a slidable mechanical interlocking structure to buffer external force and dissipate energy, so that the bonding strength and stability of a phase interface are remarkably improved, and the topological copolymer can be used as a high-performance blending compatilizer and a strengthening and toughening additive.

The invention relates to a thermally activated delayed fluorescence rotaxane polymer as well as a preparation method and application thereof, and belongs to the technical field of organic photoelectric materials. According to the invention, alkyl chain fluorene is packaged in the vertical direction of difluorobenzophenone to form TADF macrocyclic molecules, and then bisphenol A and octanedioyl chloride are used for polymerization in a macrocyclic cavity. Due to the unique controllable motion property and mechanical interlocking structure of rotaxane, polyrotaxane has different mechanical, electronic and optical properties compared with a conventional polymer, so that the polyrotaxane is endowed with unique application, such as elastic tensile property, self-repairing property and the like. More importantly, due to the fact that the non-conductive pu material penetrates through a cavity of a large ring, when the material is applied to a device, a large number of rotaxane polymers are stacked, conductive benzene rings make contact with one another, the conductivity is not affected any more, and due to the fact that the pu material penetrates through the cavity, the insulativity of the pu material does not become the difficult problem that the electroluminescence efficiency of the device is affected any more any more.

A conducting composition includes a topological polymer (e.g., a polyrotaxane polymer) and poly(3,4-ethylene-dioxy thiophene):polystyrene sulfonate (PEDOT:PSS). Devices may include a conducting layer including the conducting compositions, e.g., a device comprising a conducting layer, wherein the conducting layer includes a polyrotaxane polymer and a PEDOT:PSS array. The devices are useful in bioelectronics, including high-resolution electrophysiological monitoring of deformable tissues and localized neuromodulation for high-precision control of individual muscle activities.

The application discloses a kind of dynamic slip ring supramolecular polymer network and preparation method and application thereof, belong to supramolecular polymer technical field, preparation method is: acrylic ester monomer, initiator, accelerator and poly (caprolactone) single propylene modified column [5] areocenes The polyrotaxane of initiator and accelerator occurs RAFT polymerization under inert gas atmosphere, and the dynamic slip ring supramolecular polymer network of the preparation method is obtained;This method is simple, and reaction condition is mild, easy to implement;Compared with traditional covalent polymer network, the supramolecular polymer network prepared by the method has dynamic, more excellent mechanical mechanical property and energy dissipation, and has application potential in preparation of adhesive and / or toughening agent.

The application discloses a method for preparing a large-cavity gamma-cyclodextrin polyrotaxane based on a steric hindrance method and application, and belongs to the field of high polymer materials. The polyrotaxane prepared by the method is assembled by polyethylene glycol with a steric hindrance group at an end and large-cavity gamma-cyclodextrin, and then terminated by a single amino cage silsesquioxane. By controlling the feeding ratio of the gamma-cyclodextrin and PEG, the gamma-polyrotaxane with different cyclodextrin ring numbers and single PEG nesting can be obtained. The single PEG nesting macrocyclic polyrotaxane material can provide a precursor for subsequent construction of a high-toughness and high-rebound gel material.

The invention relates to the technical field of supramolecular chemistry and high polymer materials, in particular to a method for preparing polyrotaxane based on cyclodextrin accurate rotaxane and oxidative glutathione cross-linking end capping and polyrotaxane. The method comprises the following steps: a) dissolving cyclodextrin and polyethylene glycol diacrylate in an alkaline aqueous solution or water, and carrying out self-assembly inclusion to form pseudorotaxane; and b) under an alkaline condition, adding oxidized glutathione into the quasi rotaxane solution, and carrying out Michael addition cross-linking reaction to realize end capping, thereby obtaining the polyrotaxane. According to the preparation method, the GSSG is adopted as the difunctional crosslinking end-capping reagent for the first time, the difunctional characteristic of the GSSG is utilized, the GSSG serves as the difunctional crosslinking end-capping reagent and reacts with multiple acrylate groups at the tail ends of the pseudorotaxane at the same time, a three-dimensional crosslinking network is formed, and the prepared polyrotaxane has excellent mechanical properties and unique dynamic slip ring characteristics, and can be applied to the field of chemical engineering. And the method has stimuli responsiveness to a reducing environment.

The invention discloses polyrotaxane sliding ring double-network hydrogel based on photopolymerization end capping as well as a preparation method and application of the polyrotaxane sliding ring double-network hydrogel. The preparation method comprises the following steps: S1, modifying the end position of a triblock copolymer poly (ethylene glycol)-poly (propylene glycol)-poly (ethylene glycol) to obtain a macromolecular cross-linking agent; s2, dissolving a macromolecular cross-linking agent, aldehyde group-beta-cyclodextrin and a monomer in deionized water, and then adding a photoinitiator to obtain a mixed solution; and S3, mixing the mixed solution and the gelatin aqueous solution, standing, defoaming, and carrying out an illumination reaction to obtain the polyrotaxane sliding ring double-network hydrogel based on photopolymerization blocking. The polyrotaxane sliding ring double-network hydrogel based on photopolymerization end capping prepared by the invention improves dynamic responsiveness, and can meet the requirement of quick response to environmental stimulation in the field of intelligent materials.

The invention discloses a mechanically interlocked polyrotaxane conductive hydrogel and a preparation method and application thereof, and the hydrogel is prepared by taking quasi rotaxane formed by self-assembling a water-soluble allyl functionalized naphthalene tube and polyethylene glycol diacrylate as a dynamic crosslinking unit and performing one-step photopolymerization on the dynamic crosslinking unit and an ethylene monomer. The hydrogel has ultrahigh stretchability (fracture strain gt, 2450%), skin-like low modulus (about 8.5 kPa), excellent fatigue resistance, high ionic conductivity (7.46 mS / cm) and strong interface adhesion. The invention further discloses application of the hydrogel in preparation of high-performance flexible strain sensors and biological electrodes. In a biological electrode, stable conformal contact with the skin can be formed, high-fidelity and motion artifact-resistant electrocardio and electromyographic signal acquisition is realized, and the signal-to-noise ratio is still kept above 34 dB under dynamic motion. The preparation process is simple, the biocompatibility is good, and the application prospect in the fields of wearable medical monitoring and human-computer interaction is wide.

The application belongs to the technical field of nylon composite materials, and specifically provides a corrosion-resistant composite material, a preparation method and application of the corrosion-resistant composite material in a gear.A corrosion-resistant composite material comprises the following components: modified nylon 6, reinforcing filler and auxiliary agent; the modified nylon 6 is formed by in-situ polymerization of boron nitride nanosheets coated with polydopamine, amphiphilic ion-modified polyrotaxan and monomer caprolactam; and the reinforcing filler is composed of glass fibers modified by a silane coupling agent and SiCw.The corrosion-resistant composite material prepared by the application has the advantages of high thermal conductivity, high strength and good toughness, and is suitable for preparing a composite nylon gear.

The present invention belongs to the technical field of biomedicine, and specifically relates to an mRNA delivery system targeting DC cells and a preparation method therefor. The present invention innovatively grafts two molecules, mannose and guanidinoacetic acid, onto the cyclodextrin structure of polyrotaxane by means of triethylenetetramine. The grafted mannose has a DC cell-targeting effect, while the guanidino group in guanidinoacetic acid has potential cell-penetrating activity. Experimental results show that when both are simultaneously grafted onto the cyclodextrin structure of polyrotaxane, the targeting precision and delivery efficiency of the delivery system for DC cells can be synergistically enhanced. The mRNA delivery system targeting DC cells prepared by the present invention enriches the research scope of nucleic acid delivery systems and also provides strong technical support for the field of biomedicine, including tumor therapy.

This invention relates to the field of solid electrolyte preparation technology, specifically to a solid electrolyte and its preparation method. The preparation method involves mixing raw materials to form a solid electrolyte, wherein the raw materials include Li₂O and polyrotaxane; wherein the preparation of Li₂O includes: placing an oxygen-containing lithium source at the positive electrode of an electric field in a reaction chamber, and evacuating the reaction chamber; introducing process gas into the reaction chamber, gradually increasing the discharge intensity of the electric field from 1-3 kW to 8-10 kW; maintaining the discharge intensity at 8-10 kW and stopping the introduction of process gas into the reaction chamber; reducing the discharge intensity to 3-5 kW and maintaining it, and introducing process gas into the reaction chamber to obtain Li₂O; the pressure in the reaction chamber is controlled at 10 kcal / kg during the preparation process. ‑1 ~10 3 Pa. This solves the problems of high grain boundary resistance and low ionic conductivity in existing composite solid electrolytes.

The present invention provides a crosslinked polymer composition exhibiting significantly improved elongation at break over conventional ones, and a polymer composition and a polyrotaxane, each of which can be used as a raw material of the crosslinked polymer composition.The polyrotaxane contains a linear molecule, a cyclic molecule, and a blocking group, wherein the cyclic molecule has a hydrosilyl group. The polymer composition contains the polyrotaxane and a polymer, wherein the polymer has a double bond on at least either a main chain or a side chain. The crosslinked polymer composition is produced by crosslinking of the polymer composition through chemical reaction between the hydrosilyl group of the cyclic molecule and the double bond of the polymer.

The invention belongs to the technical field of nylon composite materials, and particularly provides a corrosion-resistant composite material, a preparation method and application of the corrosion-resistant composite material in gears. The corrosion-resistant composite material comprises the following components: modified nylon 6, a reinforcing filler and an auxiliary agent, the modified nylon 6 is formed by in-situ polymerization of a boron nitride nanosheet coated with polydopamine, polyrotaxane modified by amphiphilic ions and a monomer caprolactam, and the reinforcing filler is composed of glass fiber modified by a silane coupling agent and SiCw. The corrosion-resistant composite material prepared by the invention has the advantages of high thermal conductivity, high strength and good toughness, and is suitable for preparing composite nylon gears.

[Problem] The present invention addresses the problem of developing a stretchable biomaterial (in particular, a stretchable collagen). [Solution] The present inventors: found a method for producing a polyrotaxane comprising a cyclic molecule with an aldehyde group adduct, by which it is possible to specifically add an aldehyde group to a cyclic molecule of the polyrotaxane; found a method for producing a stretchable biomaterial, the method including a crosslinking method which can suppress reductive amination and the generation of free aldehydes; and further, confirmed that a filamentous collagen is stretchable, leading to the completion of the present disclosure.

The invention belongs to the technical field of two-dimensional covalent organic frameworks, and particularly relates to a single-crystal polyrotaxane covalent organic framework as well as a preparation method and application thereof. The single-crystal polyrotaxane covalent organic framework provided by the invention has a structure as shown in a formula I. The structure of the formula I contains cyclodextrin, and has circular dichroism and circular polarization luminescence activity. In addition, the circular dichroism and the circular polarization luminescence activity of the single-crystal polyrotaxane covalent organic framework can be regulated and controlled by changing different cyclodextrin types and feed ratios.

This invention discloses a polyrotaxane-functionalized basalt composite coating and its application, belonging to the field of high-performance composite material interface engineering and anti-corrosion coating technology. The composite coating comprises an epoxy resin matrix and polyrotaxane-functionalized basalt flakes dispersed therein. The functionalized basalt flakes consist of a basalt flake substrate and polyrotaxane molecules covalently grafted onto its surface via amide bonds. These polyrotaxane molecules are formed by a host-guest inclusion reaction between end-carboxyl-terminated polyethylene glycol and cyclodextrin, and the cyclic molecules can slide along the polymer axis. In preparation, the basalt flakes are first pretreated with acid and activated with a quaternary ammonium base, then grafted with amino groups. The synthesized end-carboxyl-terminated polyrotaxane is then grafted onto the flake surface via amide bonds, and finally dispersed in the epoxy resin. This invention constructs an interface buffer layer with mechanical interlocking and dynamic sliding characteristics between the filler and the resin, effectively alleviating stress concentration and delaying crack propagation. It possesses both high barrier properties and high toughness, making it suitable for metal protection in marine engineering, deep-sea equipment, and bridge steel structures.

A non-aqueous secondary battery binder polymer including a first structural unit derived from a monomer (a1), a second structural unit derived from a monomer (a2), and a third structural unit derived from a monomer (a3), wherein the monomer (a1) is a non-ionic compound having only one ethylenically unsaturated bond, the monomer (a2) is a compound having a carboxy group and only one ethylenically unsaturated bond, and the monomer (a3) is a polyrotaxane including a cyclic molecule having a cyclic framework to which a group containing an ethylenically unsaturated bond is bonded and a chain molecule that passes through an openings of the cyclic molecule and has stopper groups at both ends.

This invention discloses a polyimide / indium tin oxide composite transparent conductive flexible thin film material enhanced by the molecular pulley effect and its preparation method, belonging to the field of polyimide thin film technology. This invention introduces polyrotaxane into a transparent polyimide matrix through a graft copolymerization reaction to construct a sliding crosslinking network, obtaining a polyrotaxane-reinforced polyimide material. A room-temperature magnetron sputtering process is used to deposit a nanoscale indium tin oxide thin film on the surface of the polyrotaxane-reinforced polyimide material, thus obtaining a flexible transparent conductive film on a polyimide substrate. The transparent conductive film prepared by this invention possesses both excellent conductivity and optical transmittance. After a 180° bending cycle fatigue test, it exhibits excellent stability and can be used as a flexible transparent electrode. It also possesses advantages such as good transparency, high strength, high toughness, anti-relaxation, and anti-creep, making it suitable for flexible optoelectronic devices such as flexible organic solar cells.