12 results about "Helical polymer" patented technology

An actuator includes a twisted and coiled polymer fishing line and an untwisted resistance heating wire (TCPFLRHW) actuator and a coating on the TCPFLHRW actuator. The coating includes a mixture of carbon nanotubes, metal nanoparticles, and mesoporous carbon nanoparticles, and in some variations, the coating includes a polymer matrix with the carbon nanotubes, metal nanoparticles, and mesoporous carbon nanoparticles disposed in the polymer matrix. And the actuator exhibits enhanced actuator parameters such as actuator efficiency, hydrophobicity, power consumption, actuation frequency, dynamic actuation and cooling rate.

The application provides a temperature-sensitive helical polymer based on a quinoline structure and a preparation method and application thereof, and relates to the technical field of organic synthesis.The preparation method of the temperature-sensitive helical polymer based on the quinoline structure comprises the following steps: synthesis of 8-(aminomethyl)-4-isobutoxyquinoline-2-carboxylic acid polymer; crude product purification; and synthesis of chiral 8-(aminomethyl)-4-isobutoxyquinoline-2-carboxylic acid polymer.The length of the helical structure is improved, and the transmission performance of the helical structure as an artificial ion channel is improved.In the synthesis of the temperature-sensitive compound, a functionalized quinoline compound is innovatively used as a structure main body of a helical molecule, a series of homopolymers are formed through a PyBOP polymerization mode, and the existence of the benzyl group in the helical structure unit makes the polymer with the helical structure have repeatable and stable responsiveness to temperature, so that the polymer can be used for preparing a temperature-sensitive ion channel.

The invention relates to synthesis of a circularly polarized light isonitrile material with multi-stimulus response and all-light-white light regulation and control, and belongs to the field of intelligent high polymer materials. According to the covalent construction strategy, multi-adjustable CPL from molecular design to supramolecular assembly is achieved, and due to the fact that the azobenzene side group is subjected to reversible cis-reflective isomerization under stimulation of light, pH, metal ions and humidity, the material is endowed with various responsive CPL characteristics; the method has potential application value in multicolor dynamic display, anti-counterfeiting security, information encryption and chiral logic gate application. This work provides a basic insight for covalently constructing static helical polymers with dynamically tunable CPL.

The invention discloses a spiral fiber prepared based on an electrostatic spinning technology, which is characterized in that through a coaxial electrostatic spinning process, a rigid high polymer spinning solution is used as an inner layer spinning solution, a flexible high polymer spinning solution is used as an outer layer spinning solution, and electrostatic spinning is carried out to prepare the spiral fiber with a core-shell structure; the glass transition temperature difference between the rigid high polymer and the flexible high polymer is required to be greater than 80 DEG C, and lithium chloride or other strong electrolyte substances are added into the rigid high polymer spinning solution. On the basis of the spiral fiber, by adding the polyacetylene chiral spiral polymer and the fluorescein, the chiral spiral micro-nano fiber with the continuous spiral morphology and the circular polarization luminescence performance is further obtained, the mechanical performance and the circular polarization luminescence performance of the chiral fiber can be remarkably improved at the same time, and the fiber is flexible and can be bent and curled; the high-performance requirements and application of special photoelectric devices, chiral biomimetic materials and the like can be met.

The application discloses a method for regulating the chirality of helical polymers by using achiral small molecules and application thereof. The method comprises the following steps: dissolving or dispersing helical polymers with dynamic helical conformation in an aqueous medium; adding achiral aromatic small molecules as an additive; adjusting the molar ratio of the additive and the repeating units of the polymer, so that the circular dichroism signal of the polymer changes, and the helical conformation of the main chain of the helical polymer is reversed, enhanced or stabilized. The application can effectively regulate the helical chirality of helical polymers such as dendritic temperature-sensitive polyphenylacetylene in an aqueous phase by using achiral aromatic small molecules without introducing exogenous chiral substances. The chiral optical response can be further synergistically controlled by adjusting conditions such as pH and temperature. The method is simple in operation and mild in conditions, and can be used for preparing stimulus-responsive chiral optical materials, chiral recognition materials, chiral separation materials and biomimetic supramolecular assembly materials.

The invention discloses an intracranial peripheral heart multifunctional pacing guide wire based on optical fiber sensing, and relates to the field of medical instruments, and the pacing guide wire comprises a near-end interface section, a middle sensing section and a far-end sensing section which are sequentially connected from the near end to the far end; the middle sensing section comprises a layered coaxial structure, and the layered coaxial structure comprises a core layer, a sensing waveguide layer wrapping the core layer, a conductive layer wrapping the sensing waveguide layer and a lubricating layer wrapping the conductive layer from inside to outside; a polymer waveguide extending in the axial direction of the guide wire is arranged in the sensing waveguide layer, and the track of the polymer waveguide is a three-dimensional spiral line. The three-dimensional spiral polymer waveguide is integrated in the sensing waveguide layer, the intuition and reliability of navigation can be remarkably improved, information guarantee is provided for the pacing electrode to accurately reach and stably abut against the heart target spot, and therefore the success rate and safety of an operation are improved.

The invention provides a spiral polymer with an acid / alkali response multiple chiral switching function as well as a preparation method and application of the spiral polymer. The helical polymer is prepared by combining polyacetylene with an acid-base responsive Rhodol structure; under the condition that different acids and alkalis are added, the helical polymer can induce to generate multiple reversible switching chiral optical states. The helical polymer prepared by the technical scheme of the invention can be induced to generate as many as five chiral optical states under the addition of different acids and bases, the switching quantity of the chiral optical states is far higher than that of 2-3 optical chiral states in the prior art, and particularly, the switching reversibility of the chiral states is good.

The invention discloses a method for identifying chiral enantiomeric excess, which is characterized in that a helical polymer P3HT-PPI is used as a gas sensitive active layer to construct a detector so as to detect the chiral enantiomeric excess. The configuration content in the mixed configuration chiral enantiomer is detected by utilizing the difference interaction between different configurations of a chiral object to be detected and the structure of a chiral detection object, and the mixed configuration chiral enantiomer can be applied to the fields of drug inferior quality identification, medical diagnosis and the like, has good cycling stability, is simple in manufacturing method, is easy to integrate, and can be widely applied to the fields of drug inferior quality identification, medical diagnosis and the like. Good application prospects are realized.

The invention discloses a boron-nitrogen-containing covalent organic polymer single crystal with adjustable luminescence color constructed based on an isomer modification strategy and application thereof, and belongs to the technical field of organic photoelectric functional materials.According to the isomer modification strategy provided by the invention, two polymer single crystals (A and B) are successfully obtained through dynamic boron-nitrogen coordination; the helical polymer single crystal A has a loose accumulation model, and can effectively inhibit interchain aggregation, so that the helical polymer single crystal A is endowed with an effective luminescence characteristic; the spiral polymer single crystal B has a tight accumulation model, so that luminescence quenching is caused; and finally, realizing the application of the boron-nitrogen covalent organic polymer single crystal in advanced information encryption for the first time based on the luminous color adjustable property response of the polymer single crystal A solvent response. The invention not only provides a novel intelligent crystalline material, but also establishes a powerful strategy for designing a crystalline polymer with an accurate structure and performance.

The application discloses a kind of chiral helical polyisocyanide catalysts modified by proline dipeptide and preparation method, the structural formula of the catalyst is as follows:Wherein, n=50~250.The preparation method is as follows, ester exchange is carried out by three proline chains and pentafluorophenol isocyanide to prepare monomer, and the monomer is initiated by Pd (II) catalyst to prepare chiral helical polymer, and then the tert-butyloxycarbonyl protecting group is removed to prepare chiral helical polyisocyanide catalyst with catalytic function.The proline dipeptide modified chiral helical polyisocyanide catalyst prepared by the application can be prepared by active controlled polymerization of corresponding monomer, the molecular weight is controllable, the molecular weight distribution is relatively narrow, and can be used for catalyzing asymmetric aldol and Michael addition reaction, and the preparation method is simple, environment-friendly, and the yield is high.

A polymer comprising repeating units comprising aromatic ring moieties in the backbone, wherein the helical polymer structure is provided by a pi-pi interaction between the aromatic ring moieties; a package comprising a polymer; and methods of making the polymer and packaging. The polymer imparts moisture barrier properties and gas barrier properties to the package.

This invention discloses a coordination polymer-coated catalytic material derived from twisted polypyrrole nanotubes, its preparation method, and its applications. First, using a chiral surfactant as a template, a helical polymer structure is formed by inducing polymer monomers to act as the core. Then, a transition metal source is introduced to further assemble a helical support. Next, an organic ligand is used for coordination coating to form a shell. Finally, after pyrolysis under an inert gas, a dense twisted carbon layer is formed at the core-shell interface, yielding the coordination polymer-coated catalytic material derived from twisted polypyrrole nanotubes. The introduction of the helical core in this catalytic material not only helps form a twisted carbon interface but also helps induce a uniform distribution of transition metal active sites. The preparation method of this invention is convenient, and the obtained catalytic material exhibits good oxygen reduction / evolution bifunctional catalytic activity, stability, and applicability to flexible zinc-air batteries.