28 results about "Ethylenedioxy" patented technology

The invention belongs to the field of biomedical materials, and discloses a hydrogel patch with piezoelectricity, conductivity and high adhesion and a preparation method and application of the hydrogel patch. Polyvinyl alcohol (PVA) and acrylic acid (AA) serve as polymer frameworks of the hydrogel patch; the invention relates to a nano-zinc oxide / poly (3, 4-ethylenedioxythiophene) / poly (styrenesulfonic acid) (PEDOT: PSS) composite conductive adhesive, which comprises nano-zinc oxide (ZnO) as a piezoelectric material, poly (3, 4-ethylenedioxythiophene)-poly (styrenesulfonic acid) (PEDOT: PSS) as a conductive material, and N-hydroxysuccinimide acrylate (NHS-AA) as an adhesive functional monomer. According to the invention, active ester groups in the N-hydroxysuccinimide acrylate are utilized, so that the patch can quickly form covalent amido bonds with amino groups on the surface of a tissue in a dry state, firm adhesion is realized, local nerve repair can be effectively promoted through a piezoelectric effect, a novel ideal material is provided for disease treatment, and the patch has wide application prospects. Wide clinical application prospects are realized in the field of biological medicines.

The invention provides a novel silane coupling agent and a preparation method thereof, and belongs to the technical field of silane coupling agents, and the preparation method comprises the following steps: taking chloropropyltriethoxysilane and 2, 2-(1, 2-ethanedioxy) diethyl mercaptan as raw materials, adding a catalyst and an acid-binding agent, mixing, and heating for reaction to obtain the novel silane coupling agent. The invention provides a novel silane coupling agent and a preparation method thereof. The purposes of facilitating industrial production and obtaining high-purity and high-yield products are achieved.

The invention provides conductive polymer hydrogel, a preparation method thereof and application of the conductive polymer hydrogel in biological tissues. The conductive polymer hydrogel comprises poly (3, 4-ethylenedioxythiophene): polystyrene sulfonate and water, or the conductive polymer hydrogel comprises poly (3, 4-ethylenedioxythiophene): polystyrene sulfonate, an additive component and water, the additive component comprises one or more of a non-conductive polymer and an ionic compound, and the additive component and / or poly (3, 4-ethylenedioxythiophene): polystyrene sulfonate and / or poly (3, 4-ethylenedioxythiophene): polystyrene sulfonate and / or poly (3, 4-ethylenedioxythiophene): polystyrene sulfonate and / or poly (3, 4-ethylenedioxythiophene): polystyrene sulfonate and / or poly (3, 4-ethylenedioxythiophene): polystyrene sulfonate. The polystyrenesulfonate is of a net structure, and the polystyrenesulfonate is of a polystyrenesulfonate structure. The conductive polymer hydrogel has a certain network structure and has better flexibility and conductivity. The conductive polymer hydrogel can meet the wide mechanical-electrical property requirements required by bioelectronic application, and can be effectively used as a biological electrode for epidermal and implantable electrophysiological signal recording by synergistically balancing mechanical compliance and conductivity, and stable and reliable high-signal-to-noise-ratio signals are provided.

The application relates to the field of electrochemistry, in particular to a method for determining ion concentration based on a double electrolytic cell ion selective electrode, which comprises the following steps: using a poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonic acid) modified glassy carbon electrode or a reduced graphene oxide modified glassy carbon electrode as a working electrode, using a full solid-state ion selective electrode as a reference electrode, and using a platinum wire electrode as a counter electrode; inserting the working electrode and the counter electrode into a test electrolytic cell, inserting the reference electrode into a sample electrolytic cell, connecting the test electrolytic cell and the sample electrolytic cell through Ag / AgCl as a salt bridge, and determining the ion concentration in a to-be-measured solution by adopting a constant potential coulomb analysis method. The technical scheme of the application can minimize the current response time while ensuring the accuracy of ion concentration determination, realizes rapid measurement of ion concentration, and can be applied to detection of ion concentration in human serum.

The invention relates to the technical field of batteries, in particular to a silicon-carbon composite material and a lithium ion secondary battery. The silicon-carbon composite material comprises silicon-carbon particles and an aromatic polymer coating layer on the surface, and a monomer of the silicon-carbon composite material is selected from at least one of aniline, pyrrole, thiophene, 3, 4-ethylenedioxythiophene and phenylacetylene. The silicon content of the central area of the silicon-carbon particle is higher than that of the edge area, in the cross section scanning electron microscope energy spectrum of the silicon-carbon composite material, the silicon content of the central area is x0, the silicon content of any point on the edge is x1, a is equal to x1 / x0, and 0.8 < = alt; 1; the distance from the center of the silicon-carbon particle to the edge is R, the silicon content at a position 0.5 R away from the center of the silicon-carbon particle is x2, and x2 is greater than (x1 + x0) / 2; in a small-angle XRD (X-Ray Diffraction) spectrum of the silicon-carbon composite material, a first characteristic peak exists at 4-5 degrees, and the half-peak width is 0.05-0.6 degree; comprising the silicon-carbon composite material disclosed by the invention is high in cycle retention rate and good in low-temperature performance.

The present invention discloses a cyano-distyryl crown ether macrocyclic fluorescent probe, its synthesis method and application, belonging to the technical fields of organic synthesis and analytical chemistry. The cyano-distyryl crown ether macrocyclic fluorescent probe has a "2 + 2" macrocyclic structure with cyano-distyryl as the structural unit bridged by a crown ether chain, and its chemical name is tetra-(4-triethyleneglycolyl-1-cyano-1,2-diphenylvinyl) macrocycle; in a pure tetrahydrofuran solution, this fluorescent probe has a very weak light blue fluorescence emission at 446 nm, but in a tetrahydrofuran-water (5:95) solution, this probe has an obvious visible blue-green fluorescence emission at 446 nm. When this fluorescent probe is formulated into a certain concentration of tetrahydrofuran-water solution and mixed with the carbendazim solution to be detected, this fluorescent probe has a strong intermolecular interaction with carbendazim, and its fluorescence intensity is significantly enhanced, and the presence of other guests has little interference on its detection effect, and the efficient and selective detection of the pesticide carbendazim can be realized.

The invention provides ultrafast self-healing polyurethane based on disulfide bonds and a preparation method and application thereof, and the preparation method comprises the following steps: (1) under vacuum, mixing polytetrahydrofuran diol, 2, 2 '-(1, 2-ethanedioxy) diethyl mercaptan and 2-hydroxyethyl disulfide, and reacting to obtain a homogeneous soft segment mixture; (2) adding isophorone diisocyanate into the homogeneous soft segment mixture, and carrying out prepolymerization and chain extension reaction to obtain a reacted solution; and (3) adding pentaerythritol tetrakis (3-mercaptopropionic acid) into the reacted solution to carry out cross-linking reaction, and then adding a catalyst to assist polymerization, thereby obtaining the disulfide bond-based ultrafast self-healing polyurethane. According to the present invention, the dynamic disulfide bond is introduced into the polyurethane, such that the high self-healing efficiency and the short polymerization time can be achieved, and the reprocessing and the recycling can be achieved;

The invention discloses a solid-liquid mixed aluminum electrolytic capacitor suitable for a low-pressure environment, and relates to the technical field of capacitors. The lithium ion battery comprises a core package, poly (3, 4-ethylenedioxythiophene)-poly (styrenesulfonic acid), electrolyte, a rubber plug and an aluminum shell, the core package is formed by winding a positive electrode foil, a carbon foil, a guide pin and electrolytic paper and is of a cylindrical winding structure; the electrolyte is prepared by mixing ethylene glycol, 1-ethyl-3-methylimidazole bis (trifluoromethanesulfonyl) imine salt, N-butyl-N-methylpyrrolidine bis (trifluoromethanesulfonyl) imine salt, ethyl trifluoroacetate, fluoroethylene carbonate, cyclic carbonate and nano silicon dioxide. The preparation method comprises the following steps: mixing the ethylene glycol, the 1-ethyl-3-methylimidazole bis (trifluoromethanesulfonyl) imine salt, the N-butyl-N-methylpyrrolidine bis (trifluoromethanesulfonyl) imine salt with the ethyl trifluoroacetate; the electrolyte prepared from the components such as the ethyl trifluoroacetate effectively improves the low-voltage resistance of the electrolytic capacitor; the introduction of the components such as the high-hardness rubber plug further improves the low-temperature and low-pressure resistance. Therefore, the method has a wider application prospect.

The application belongs to the technical field of polymers, and particularly relates to a triphenylamine derivative conjugated polymer and a preparation method and application thereof. The triphenylamine derivative conjugated polymer has a structure shown in formula (1): wherein X is an electron-withdrawing group; D is thiophene or 3,4-ethylenedioxythiophene; pi is thiophene or 3,4-ethylenedioxythiophene; and n is a positive integer. The triphenylamine derivative conjugated polymer has good optical contrast and coloring efficiency.

The invention discloses a ternary system coagulating bath and a prepared hydrogel fiber, and belongs to the technical field of polymer hydrogel. The ternary system coagulating bath comprises a hydrogen bond donor and a hydrogen bond acceptor in a molar ratio of not less than 1: 1, and a reinforcing agent accounting for 0.5-2wt% of the total mass of the hydrogen bond donor and the hydrogen bond acceptor; the total content of the hydrogen bond donor and the hydrogen bond acceptor at least accounts for 70wt% of the ternary system coagulating bath; and the balance of water. Wherein the hydrogen bond donor is an organic small molecule containing a Lewis acid site; the hydrogen bond acceptor is a metal organic complex containing Lewis alkaline sites; the reinforcing agent is one or more of graphene oxide, a carbon nano tube or poly (3, 4-ethylenedioxythiophene)-poly (styrene sulfonic acid). The prepared hydrogel fiber is good in mechanical property and conductivity, the breaking strength is not lower than 0.4 MPa, the elongation at break is not lower than 190%, and the conductivity is not lower than 2S / m.

The present invention discloses a ternary system coagulation bath and a prepared hydrogel fiber, belonging to the technical field of polymer hydrogels. The ternary system coagulation bath includes a hydrogen bond donor and a hydrogen bond acceptor with a molar ratio of not less than 1:1, and a reinforcing agent accounting for 0.5~2wt% of the total mass of the hydrogen bond donor and the hydrogen bond acceptor; the total content of the hydrogen bond donor and the hydrogen bond acceptor accounts for at least 70wt% of the ternary system coagulation bath; water balance; wherein the hydrogen bond donor is an organic small molecule containing a Lewis acidic site; the hydrogen bond acceptor is a metal organic complex containing a Lewis basic site; the reinforcing agent is one or more of graphene oxide, carbon nanotubes or poly (3,4-ethylenedioxythiophene)-poly (styrene sulfonic acid). The mechanical properties and electrical conductivity of the prepared hydrogel fiber are good, the breaking strength is not less than 0.4MPa, the elongation at break is not less than 190%, and the electrical conductivity is not less than 2S / m.

The present invention provides a fluorescent flexible tensile sensor, a preparation method, and applications thereof. The method comprises: dissolving 1,4-bis-[4-(3-acryloxypropoxy)benzoyloxy]-2-methylbenzene, 2,2′-(1,2-ethylenedioxy)bis-ethanethiol, and pentaerythritol mercaptopropionate in a solvent to obtain a RM mixture; adding an aggregation-induced luminescence material and a catalyst to the RM mixture to carry out a catalytic polymerization reaction to obtain a reaction mixture; curing the reaction mixture in a mold, and drying and removing the solvent to obtain a fluorescent flexible tensile sensor. The present invention combines the aggregation-induced luminescence material with a liquid crystal elastomer through a cross-linking reaction to prepare a wireless force sensor that is flexible, highly stretchable, and wirelessly resistant to electromagnetic interference, and is low in cost and lightweight.

The application discloses a polyester-based high-toughness plastic sheet and a preparation method thereof, and belongs to the technical field of high polymer material preparation.The polyester-based high-toughness plastic sheet comprises modified polyester resin, a first modifier and a second modifier; the modified polyester resin is prepared by esterification through dehydration condensation of unsaturated alkenyl diacid anhydride and dihydroxyl crown ether as raw materials; the first modifier is alkyl phenyl ether of double-end secondary ammonium salt; and the second modifier is 2,2'-(1,2-ethylenedioxy) bisethyl mercaptan with double-end mercapto groups; the polyester-based high-toughness plastic sheet is provided; through a reasonable modification method, the toughness can be improved without obviously sacrificing other performances.

The invention relates to the field of microalgae efficient culture and wastewater recycling treatment, in particular to a microalgae biofilm carrier with a conductive coating and a preparation method of the microalgae biofilm carrier. The preparation method comprises the following steps: adding carbon quantum dots into poly (3, 4-ethylenedioxythiophene)-poly (styrenesulfonic acid), adding a reagent for promoting material adhesion, and uniformly mixing to obtain a suspension; soaking the substrate in a surface tension adjusting reagent, and then drying to obtain a modified substrate; and spin-coating the suspension on the surface of a modified substrate, and then sequentially cleaning and freeze-drying to obtain the microalgae biofilm carrier. Compared with a traditional microalgae biofilm carrier, the microalgae biofilm carrier has higher electron conduction efficiency, is more beneficial to attachment of microalgae organisms, can improve the extracellular electron transfer efficiency of the microalgae and the photosynthesis rate of the microalgae, and promotes rapid formation of a microalgae biofilm.

The invention relates to the technical field of analysis and detection, in particular to a molecular imprinting sensor for detecting alpha-linolenic acid as well as a preparation method and application of the molecular imprinting sensor. The molecularly imprinted sensor is prepared by the following steps: growing ZIF-8 on the surface of an MXene material in situ, and adding thionine as a probe to prepare an MXene (at) ZIF-8-Thi composite material; coating the surface of an SPE (Solid Phase Extraction) electrode with the coating; then, o-phenylenediamine and 3, 4-ethylenedioxythiophene are adopted as functional monomers, alpha-linolenic acid is adopted as a template molecule, a molecularly imprinted polymer film is polymerized on the surface of the electrode, and after the template molecule is eluted, the molecularly imprinted sensor is prepared. The molecularly imprinted sensor disclosed by the invention can be used for rapidly and accurately detecting the content of alpha-linolenic acid in samples such as pork and the like, and high-sensitivity and high-selectivity detection of alpha-linolenic acid is realized. The preparation method of the molecularly imprinted sensor is simple, the manufacturing cost is low, and the molecularly imprinted sensor has a wide application prospect in the field of food safety detection.

The invention provides a modified benzoxazine resin coating and a preparation method thereof, and the preparation method comprises the following steps: raw materials including curcumin, paraformaldehyde and a compound containing a primary amine group are subjected to a reaction in an organic solvent to obtain a modified benzoxazine monomer, and then the modified benzoxazine monomer is filtered, the compound containing the primary amine group is prepared from the following raw materials: DL-alpha-lipoic acid, triethylamine, 2, 2 '-(ethylenedioxy) bis (ethylamine) and a catalyst; carrying out rotary evaporation on the solution obtained by filtering to remove redundant organic solvent, and then obtaining a benzoxazine monomer concentrated solution; uniformly stirring the benzoxazine monomer concentrated solution, and coating the benzoxazine monomer concentrated solution on the surface of a substrate; and heating and curing the surface of the substrate to form the coating. The modified benzoxazine resin provided by the invention has relatively low curing temperature, excellent mechanical properties and corrosion resistance.

The invention belongs to the technical field of terahertz wave absorption, provides a chip-borne multi-ball embedded structure terahertz wave-absorbing material and a preparation method thereof, and is used for solving the problems of large thickness, high reflection intensity, easy generation of secondary electromagnetic pollution and the like of an existing conductive polymer electromagnetic wave-absorbing material. The preparation method comprises the following steps: taking large-area flaky poly (3, 4-ethylenedioxythiophene) (PEDOT) as a matrix, and randomly embedding polystyrene microspheres in the matrix; according to the invention, micron-sized polystyrene microspheres are introduced to construct a spatial isolation template, a propagation path of terahertz waves is greatly increased by using a lamellar structure which is randomly and continuously deformed, and incident electromagnetic waves can be gradually and effectively lost due to multiple reflections, so that the terahertz wave-absorbing agent with excellent performance is obtained; moreover, waterborne polyurethane can be filled with the on-chip multi-ball embedded structure wave-absorbing agent to obtain terahertz wave-absorbing slurry, so that the terahertz wave-absorbing slurry and a device are integrated, or a flexible terahertz wave-absorbing film is obtained through drying.

The invention discloses a star-shaped triphenylamine derivative conjugated polymer as well as a preparation method and application thereof. Relates to the field of electrochromic materials. The structural formula of the star-shaped triphenylamine derivative conjugated polymer is shown as the following formula (I), wherein X is an electron withdrawing group and is selected from nitro, cyano, aldehyde group, carboxyl, thiol group, acyl or trifluoromethyl; pi is thiophene or 3, 4-ethylenedioxythiophene; and n is an integer from 1 to 10000. According to the star-shaped triphenylamine derivative conjugated polymer provided by the invention, an electron withdrawing group (X) is introduced to a triphenylamine para-position and thiophene or 3, 4-ethylenedioxythiophene is combined as a pi bridge, so that a three-dimensional star-shaped conjugated topological structure is constructed. According to the design, the limitation of electron transfer anisotropy of the traditional one-dimensional linear conjugated polymer is effectively overcome, and the intramolecular charge delocalization capability and the electron transfer rate are enhanced.

The application discloses a method for preparing continuous and uniform liquid crystal elastomer melt-spun fibers on a large scale. The liquid crystal elastomer is prepared from a diacrylate reaction intermediate (RM82), 2,2'-(ethylenedioxy) dialkyl mercaptan (EDDT), toluene, dipropylamine (DPA), dibutyl tin dilaurate (DBTDL), butylated hydroxytoluene (BHT) and poly(cyclohexane diisocyanate) (Tris-Iso) as raw materials, and then melt spinning is performed. The method can prepare continuous and uniform liquid crystal elastomer melt-spun fibers on a large scale. The liquid crystal elastomer melt-spun fibers obtained by the method have good resilience, and the maximum elongation deformation under the action of external force can reach 3 times. After being placed in an oven at 85 DEG C for a certain period of time, it is found that the liquid crystal elastomer melt-spun fibers have certain flexibility, better resilience, good retraction performance and the maximum retraction speed is 1.33 cm / s.

A degradable polyurethane (PUr) having degradation rates useful for hemostatic dressings for controlling bleeding in traumatic wounds. Degradable PUrs may be synthesized from degradable monomers based on hydrolytically labile esters and oxidatively labile thioethers using rapid click-chemistry reactions. Monomers may include trimethylolpropane tris(3-mercaptopropionate) (TMPMP), dipentaerythritol hexakis(3-mercaptopropionate) (DPEHMP), dipentaerythritol hexakis(3-mercaptopropionate) (DPEHMP) or 2,2'-(ethylenedioxy) diethanethiol reacted with hydroxyethyl acrylate, 3-buten-1-ol, 3-methyl-3-buten-1-ol, or 3-buten-2-ol. Synthesis of these monomers is rapid and has no byproducts or toxic catalysts that require removal, enabling polyol synthesis and immediate use in further polymerization

A degradable polyurethane (PUr) having degradation rates useful for hemostatic dressings for controlling bleeding in traumatic wounds. Degradable PUrs may be synthesized from degradable monomers based on hydrolytically labile esters and oxidatively labile thioethers using rapid click-chemistry reactions. Monomers may include trimethylolpropane tris(3-mercaptopropionate) (TMPMP), dipentaerythritol hexakis(3-mercaptopropionate) (DPEHMP), dipentaerythritol hexakis(3-mercaptopropionate) (DPEHMP) or 2,2'-(ethylenedioxy) diethanethiol reacted with hydroxyethyl acrylate, 3-buten-1-ol, 3-methyl-3-buten-1-ol, or 3-buten-2-ol. Synthesis of these monomers is rapid and has no byproducts or toxic catalysts that require removal, enabling polyol synthesis and immediate use in further polymerization

The present invention discloses a carbon nanocomposite conductive material and its application in cable shielding layers, belonging to the technical field of conductive shielding materials. The material comprises 20-35 parts of magnetic iron / PEDOT:PSS nanoparticles and 40-65 parts of a carbon nanomaterial; the magnetic iron / PEDOT:PSS nanoparticles are obtained by modifying the surface of magnetic iron nanoparticles with 3,4-ethylenedioxythiophene:poly(styrene sulfonic acid); and the carbon nanomaterial is one or more of carbon black, graphene oxide, reduced graphene oxide, and carbon nanotubes. By using the carbon material as the conductive material and adding the magnetic iron / PEDOT:PSS nanoparticles to replace some of the conductive fillers, the cable has the advantages of strong anti-interference ability, light weight, high strength, and good flexibility.

The application relates to the technical field of liquid crystal materials, and discloses a body temperature responsive liquid crystal elastomer as well as a preparation method and application thereof. The body temperature responsive liquid crystal elastomer is obtained by carrying out cross-linking reaction on liquid crystal monomers, a chain extender, a cross-linking agent and a catalyst to obtain an intermediate, and then carrying out cross-linking reaction on the intermediate to obtain the body temperature responsive liquid crystal elastomer; the liquid crystal monomers are 4-(6-(acryloyloxy) hexyloxy) phenyl-4-(6-(acryloyloxy) hexyloxy) benzoate and / or polyethylene glycol diacrylate; and the chain extender comprises at least one of 2,2'-(ethylenedioxy) diethyl thiol, trimethylolpropane tris(3-mercaptopropionate) or pentaerythritol tetra(3-mercaptopropionate). The liquid crystal elastomer prepared by the application has reversible body temperature responsiveness and can directly contact human skin to generate strain. After contacting the human body, the human body temperature heats the liquid crystal elastomer, and the liquid crystal elastomer deforms through phase change; when the liquid crystal elastomer leaves the human body, the liquid crystal elastomer restores to the original state through phase change in the process of cooling to room temperature.

A conjugated polymer comprising 3, 4-ethylenedioxy thiophene having general formula (I): wherein: R1, R2, R3 and R4, equal to or different from each other, represent a hydrogen atom; or are selected from ester groups having general formula (II): wherein Rs is selected from C1-C20 alkyl groups, preferably C1-C15, more preferably is a C15 alkyl group, provided that at least two of R1, R2, R3 and R4 are selected from ester groups having general formula (II); preferably, R2 and R3, equal to each other, represent a hydrogen atom and R1 and R4, equal to each other, are selected from ester groups having general formula (II); - m is an integer ranging from 0 to 100, preferably ranging from 0 to 20; - n is an integer ranging from 10 to 100, preferably ranging from 15 to 20; - A is a monovalent sulfonate anion, optionally polymeric, preferably selected from trifluoromethanesulfonate, nonafluorobutanesulfonate, p-toluenesulfonate, poly(styrene sulfonate). The above-mentioned conjugated polymer having general formula (I) can be advantageously used in anticorrosive coatings of metal surfaces. Furthermore, the above-mentioned conjugated polymer having general formula (I) can be advantageously used in the field of organic electronics, sensors and actuators, as well as in the construction of battery electrodes. Furthermore, the above-mentioned conjugated polymer having general formula (I) can be advantageously used in 3D printing compositions.

The application relates to the technical field of analytical detection, in particular to a molecular imprinting sensor for detecting alpha-linolenic acid and a preparation method and application thereof. The molecular imprinting sensor is prepared by in-situ growth of ZIF-8 on the surface of MXene material, addition of thionine as a probe to obtain MXene@ZIF-8-Thi composite material, coating of the composite material on the surface of a SPE electrode, polymerization of a molecular imprinting polymer film on the electrode surface by using o-phenylenediamine and 3,4-ethylenedioxythiophene as functional monomers and alpha-linolenic acid as a template molecule, and preparation of the molecular imprinting sensor after elution of the template molecule. The molecular imprinting sensor can rapidly and accurately detect the content of alpha-linolenic acid in pork and other samples, realizes high-sensitivity and high-selectivity detection of alpha-linolenic acid, and has a wide application prospect in the field of food safety detection due to the simple preparation method and low manufacturing cost.

The invention relates to the technical field of protective clothing, and particularly discloses an airtight chemical protective clothing fabric and a preparation method thereof. The airtight chemical protective clothing fabric comprises a chemical protective layer, a flame-retardant layer, an antistatic layer, a protective layer and a comfortable layer which are sequentially bonded from the outer layer to the inner layer. The chemical defense layer and the protective layer are both compact polymeric membranes; the antistatic layer is cloth embedded with carbon black conductive fibers; the carbon black conductive fibers are fibers formed by embedding poly (3, 4-ethylenedioxythiophene)-poly (styrene sulfonic acid) and phenoxy polyphosphazene into carbonized fibers. The fabric is comfortable to wear, and has the properties of chemical permeation prevention, flame retardance, antistatic property and corrosion resistance. The antistatic layer is cloth embedded with carbon black conductive fibers, poly (3, 4-ethylenedioxythiophene)-poly (styrenesulfonic acid) and phenoxy polyphosphazene are embedded into the fibers, the toughness of the fibers is improved, the fibers are resistant to bending, carbon powder is not prone to falling off, and the antistatic fiber has good conductivity and heat resistance and is suitable for the fields of petrochemical engineering and the like with high antistatic requirements.

This invention discloses a method for preparing dydrogesterone. Dydrogesterone is prepared by using 3,20-bis(ethylenedioxy)-19-norgestrel-5(10),9(11)diene as the starting material, followed by epoxidation, methylation, hydrogenation, and one-pot hydrolysis to remove hydroxyl groups and dehydrogenate. The preparation method is feasible, low in cost, and produces high-purity products. It has significant economic benefits when applied to industrial production.

The application discloses a solid-liquid mixed aluminum electrolytic capacitor suitable for a low-pressure environment and relates to the technical field of capacitors.The application comprises a core package, poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonic acid), an electrolyte, a rubber plug and an aluminum shell.The core package is wound by a positive foil, a carbon foil, a guide needle and electrolytic paper and has a cylindrical winding structure.The electrolyte is obtained by mixing ethylene glycol, 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl) imide, N-butyl-N-methylpyrrolidinium bis(trifluoromethylsulfonyl) imide, ethyl trifluoroacetate, fluorinated ethylene carbonate, cyclic carbonate and nano silicon dioxide.The electrolyte prepared from ethyl trifluoroacetate and other components effectively improves the low-voltage resistance of the electrolytic capacitor.The introduction of the high-hardness rubber plug and other components further improves the low-temperature and low-voltage resistance.Therefore, the application has a wider application prospect.