87 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 is suitable for the technical field of vehicle film production, and provides a high-wear-resistance anti-aging polyurethane vehicle film and a preparation method thereof.The vehicle film is prepared from a polyurethane matrix, modified composite filler, magnetic microcapsules and an anti-aging agent, the modified composite filler comprises dynamic bond grafted polyrotaxane, modified graphene oxide and photoresponsive hyperbranched polysiloxane, and the magnetic microcapsules are directionally distributed in a near-surface area of the vehicle film under the assistance of a magnetic field. According to the high-wear-resistance anti-aging polyurethane vehicle film provided by the invention, the coordination of dynamic wear resistance and light-operated self-repairing is realized through a polyrotaxane / modified graphene oxide / light-responsive hyperbranched polysiloxane ternary system, the anti-aging agent is a rare earth MOF loaded dopamine derivative, and the anti-aging function and the service life diagnosis function are integrated; the microcapsule containing the polyurethane prepolymer is compounded with a dynamic network of photoresponse hyperbranched polysiloxane and polyrotaxane to construct a dual self-repairing mechanism, and the anti-aging time can be prolonged.

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 present invention provides a mechanoelectrically coupled hydrogel microsphere with stable mechanical properties and low-loss transduction, as well as a preparation method and application thereof, belonging to the technical field of tissue engineering biorepair materials. The present invention utilizes supramolecular engineering and microfluidics technology to introduce a slip-ring structured polyrotaxane and a conductive polypyrrole network to construct stress-electrically coupled hydrogel microspheres. The molecular slip mechanism of the slip-ring structure stores and releases mechanical energy, reducing mechanical losses, while the conjugated π-electron movement in the conductive network improves the efficiency of electron transfer inside the microspheres, thereby reducing the losses in stress-electric conversion for the first time. Compared with traditional piezoelectric hydrogel microspheres, the mechanoelectrically coupled hydrogel microspheres of the present invention have a stress-electric coupling efficiency of 2.3 times higher than that of traditional piezoelectric hydrogel microspheres, and the energy dissipation rate is reduced to 43%. The mechanoelectrically coupled hydrogel microspheres can alleviate cartilage damage in rats, improve behavioral outcomes, and promote the treatment of osteoarthritis by restoring low-loss transduction between tissues.

The present invention discloses a polyrotaxane covalent organic framework material with regulated layer spacing by cyclodextrin and its application, belonging to the technical field of biomedicine. The polyrotaxane covalent organic framework material is copolymerized from a cyclodextrin aromatic polyamine inclusion compound and a (polyaldehyde bipyridine) ruthenium (II) complex; the cyclodextrin aromatic polyamine inclusion compound is a β-cyclodextrin p-phenylenediamine inclusion compound with or without a hydroxyl group; the (polyaldehyde bipyridine) ruthenium (II) complex is tris(4,4'-diformyl-2,2'-bipyridine) ruthenium (II). The present invention utilizes the large cavity of γ-cyclodextrin to increase the layer spacing of the polyrotaxane covalent organic framework material. At the same time, the material has excellent photothermal and photodynamic activities, and the material is positively charged, which can better adsorb negatively charged bacteria; moreover, it has good biocompatibility, no toxic and side effects, and has excellent therapeutic effects on wounds infected with Staphylococcus aureus.

The invention relates to a composite phase-change material (PCM) comprising a highly porous PLR aerogel and a PCM, wherein the PCM occupies an internal volume of the aerogel. This material takes full advantage of the highly porous aerogel which is capable of entrapment of high amounts of PCM, while avoiding leakage of the PCM. The physical properties of the material of the invention can be tailored by the incorporation of different functional additives. The invention further relates to a polymer / phase-change material comprising a 3D-printed polymer skeleton, and aerogel and a PCM. Methods for the preparation of these materials are also within the scope of the invention as well as their use and applications.

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.

To provide an organic-inorganic nanocomposite that exhibits anisotropic high thermal conductivity, superior mechanical characteristics, and high insulation.SOLUTION: An organic-inorganic nanocomposite comprises at least one polyrotaxane or a polymer blend including at least one polyrotaxane, and an inorganic filler that has been plasma-treated, wherein the organic-inorganic nanocomposite contains the inorganic filler in an amount of 30 vol.% or more, the inorganic filler is a two-dimensional material and serves as an insulating filler having thermal anisotropy, and the inorganic filler is oriented with an orientation degree of at least 3 in relation to the thickness direction of the organic-inorganic nanocomposite.SELECTED DRAWING: None

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 preparation method of an anti-pollution membrane based on amphoteric dynamic supramolecules, and belongs to the technical field of membrane preparation for water treatment. The method comprises the following steps: preparing a high-flux base membrane through a non-solvent induced phase separation method; preparing an amphoteric supramolecule with a "thread penetrating ring" quasi-polyrotaxane structure through a solvent induced self-assembly method; and grafting the amphoteric dynamic supramolecule to the surface of the base membrane based on a free radical polymerization reaction to form an anti-pollution layer. Supramolecular structures formed by cyclodextrin and polydimethylsiloxane are combined with a synergistic anti-pollution mechanism of hydrophilicity and a low-surface-energy micro area to improve the anti-pollution performance and water flux of the membrane. The dynamic supramolecular structure has good anti-pollution performance, is suitable for different flow rates and temperature conditions, has a high flux and a low attenuation rate, and is suitable for various water treatment processes. The preparation process is simple, raw materials are easy to obtain, and the cost is low; the membrane flux is significantly improved, the anti-pollution capacity is enhanced, and the performance can be easily restored through simple cleaning; and the membrane has good adaptability in a wide temperature and pH range.

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.

A resin composition for primary coating of an optical fiber, comprising a photopolymerizable compound, a photopolymerization initiator, and a silane coupling agent. The photopolymerizable compound comprises urethane (meth)acrylate and a UV-curable polyrotaxane, wherein the content of the polyrotaxane is from 0.05% to 11% by mass, based on the total amount of the photopolymerizable compound.

A binder composition for a non-aqueous secondary battery, which contains a copolymer having a first structural unit derived from a monomer (a1) that is a nonionic compound having only one ethylenically unsaturated bond and a second structural unit derived from a monomer (a2) that is a non-ionic compound having only one ethylenically unsaturated bond, and a polyrotaxane. The monomer (a2) is a compound having a carboxyl group and only one ethylenically unsaturated bond, and the polyrotaxane has a cyclic molecule having a cyclic skeleton and a chain molecule penetrating an opening of the cyclic molecule and having a blocking group at both ends.

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 preparation method of polyrotaxane polymer electrolyte and its application, and belongs to the technical field of lithium ion batteries. The polyrotaxane polymer is composed of a linear polymer, a cyclic molecule and an end-capping molecule. The polyrotaxane polymer electrolyte is composed of a polyrotaxane polymer, a conductive lithium salt and a porous support material. The polymer electrolyte is simple in preparation process, free of byproducts and excellent in electrochemical performance. The room-temperature ionic conductivity can be greater than 10−3 Scm−1, and the electrochemical window can be greater than 5V (vs.Li+ / Li); and the lithium metal battery assembled by the composite material has excellent cycle performance at room temperature. The interfacial compatibility of the polymer electrolyte and the electrode can be obviously improved, so that the electrochemical performance and the safety performance of the battery are improved.

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.

A composite particle containing a copolymer having a first structural unit derived from a monomer (a1) and a second structural unit derived from a monomer (a2), the monomer (a1) being a nonionic compound having only one ethylenically unsaturated bond, and the monomer (a2) being a compound having a carboxyl group and only one ethylenically unsaturated bond, and a polyrotaxane, the polyrotaxane is provided with a cyclic molecule having a cyclic skeleton and a chain molecule penetrating through an opening of the cyclic molecule and having a blocking group at both ends, and does not contain an ethylenically unsaturated bond.