356 results about "Hydrogen bonded network" patented technology

The invention provides a perovskite solar cell, a preparation method thereof and a photovoltaic module. The perovskite solar cell comprises a first electrode, a hole transport layer, a perovskite layer, an electron transport layer and a second electrode which are stacked in sequence. The material of the hole transport layer comprises a biomolecular material which is fixed on a self-assembly monomolecular layer material through an intermolecular force, and the biomolecular material comprises one or more of guanine, adenine, thymine, uracil, cytosine, hydroxymethylcytosine, xanthine, hypoxanthine, 6-mercaptopurine and corrin. According to the perovskite cell provided by the invention, the biomolecular material with a plurality of nitrogen heterocyclic structures and amino groups is added to generate multipoint hydrogen-bond interaction and pi-pi accumulation with the tail end of the SAM, so that the orderliness of molecular arrangement is improved, and the dipole direction and strength of the whole interface are regulated and controlled; and a coordination bond or hydrogen bond network is formed by the coordination compound and uncoordinated cations or anions in perovskite, so that interface defects are effectively passivated, and the thermal stability and the humid and hot life of a device are enhanced.

The invention provides a hole transport layer precursor solution, a hole transport layer, a preparation method and application of the hole transport layer, and a perovskite cell, and belongs to the technical field of hole transport layers. The hole transport layer precursor solution comprises a self-assembled single molecule and an organic solvent; the organic solvent comprises a solvent A, a solvent B and a solvent C; the solvent A comprises more than one of a phosphate ester solvent and an alcohol ether solvent; the solvent A contains four hydrogen bond receptors; the boiling point of the solvent A is 215-290 DEG C; the solvent B comprises more than one of ethanol, isopropanol, normal propyl alcohol, butanol, ethylene glycol and N, N-dimethylformamide; the solvent C comprises more than one of ethyl acetate and normal hexane. A ternary hydrogen bond network is formed through the solvent A, the solvent B and the solvent C, the agglomeration degree of SAM molecules is remarkably reduced, and the device performance is improved.

The invention relates to the technical field of polymer composite materials, and discloses a refining treatment method of a bamboo fiber ultra-nano micro powder and natural polymer blended material, which comprises the following steps: (a) premixing bamboo fiber ultra-nano micro powder and a deep eutectic solvent to obtain a premix and realize in-situ activation; (b) adding the premix and a natural polymer matrix from a main feed port of a double-screw extruder; and (c) in the melt blending process, adding a dynamic interface locking agent through a side feeding port arranged at the downstream of the main feeding port, and then extruding and granulating. A staged dynamic compatibilization process is adopted, a hydrogen bond network of bamboo fibers is destroyed by using a deep eutectic solvent to promote shearing dispersion of the bamboo fibers in the front section, and stable interface bonding is constructed in the rear section through a dynamic interface locking agent after dispersion is completed. The method synergistically solves the conflict between dispersion and interfacial compatibilization, so that the composite material has good comprehensive performance.

The invention belongs to the technical field of membrane separation, and particularly relates to a preparation method and application of a high-permeability polyamide reverse osmosis membrane. According to the invention, the problems of high energy consumption and poor water production quality caused by non-ideal flux and rejection rate of the current reverse osmosis membrane product are solved, tetrabutylammonium bromide and acyl chloride form ion pairs to reduce hydrophobicity, a hydrogen bond network of urea destroys a hydrophobic barrier of an organic phase, and migration of acyl chloride to a water phase interface is promoted; the eutectic solvent is adsorbed on a water phase interface to form a'catalytic microenvironment ', amido of an amine monomer is attracted to be close to the interface, and the concentration of a reaction area is increased. During reaction, tetrabutylammonium bromide enables an amine monomer to stably attack a transition state of acyl chloride through electrostatic interaction, and reaction activation energy is reduced; urea and sodium hydroxide in a water phase can be jointly used as an acid-binding agent to neutralize generated hydrochloric acid so as to prevent amido protonation inactivation. The method is simple to operate and suitable for large-scale production.

The application belongs to the technical field of deep eutectic solvents, and particularly relates to a ternary deep eutectic solvent and preparation and application thereof. The ternary deep eutectic solvent is composed of choline chloride, 5-sulfosalicylic acid and gamma valerolactone according to a molar ratio of 1:4:(3-25). The strong hydrogen bond network structure between the green solvent system first destroys the ester bond between lignin and hemicellulose, then cuts off the beta-O-4 bond between lignin molecules, so as to separate lignin. Meanwhile, the deep eutectic solvent can improve the stability of carbon cations due to the conjugation effect between the lone pair electrons on the heteroatom oxygen and the central carbon in the molecular structure of gamma valerolactone, so as to inhibit the condensation reaction of lignin.

The invention provides a high-safety flexible pole piece, a preparation method and a flexible lithium ion battery, the pole piece comprises a current collector and a coating arranged on the surface of the current collector, the coating comprises a flexible isolation structure and a plurality of electrode units, the flexible isolation structure constructs a plurality of accommodating areas isolated from each other on the surface of the current collector, the number of the electrode units is multiple, and the flexible isolation structure is arranged in the accommodating areas. The plurality of electrode units are respectively and independently arranged in different accommodating areas. According to the invention, accurate prevention and control of thermal runaway are realized through the electrode structure design of partition isolation and a material system with multiple hydrogen bonds synergistic effect. The electrode is divided into independent units by the flexible isolation structure, so that heat spreading is effectively blocked; and a hydrogen bond network formed by the hydroxyl-containing comonomer I, PI, PET and hexaphenoxy cyclotriphosphazene significantly enhances the interface stability and flame retardant efficiency of the electrode and the isolation structure, and improves the intrinsic safety of the battery while ensuring the flexibility of the battery.

The invention discloses a polyether polyurethane solid polymer, a preparation method thereof and application of the polyether polyurethane solid polymer in a solid electrolyte, and belongs to the technical field of polymer electrolytes and preparation of the polymer electrolytes. The problems that an existing solid polymer electrolyte is low in ionic conductivity and poor in interface stability are solved. According to the invention, polyether amine and cyclic carbonate are subjected to an in-situ polymerization reaction to synthesize a series of polyether polyurethane solid polymer electrolytes with different molecular weights and monomer proportions. The obtained polyether polyurethane solid polymer electrolyte contains rich carbamate groups, hydroxyl groups, fluorine ions and the like, and can form a strong reversible hydrogen bond network, so that the electrolyte has excellent mechanical properties, can be used as a self-supporting electrolyte membrane, and does not need an additional diaphragm. Meanwhile, a large number of dynamic reversible hydrogen bonds also enable the solid polymer electrolyte to have excellent self-healing ability, and can be self-repaired when the battery is damaged by external force in the operation process, so that the structural stability of the solid polymer electrolyte is remarkably improved.

The invention relates to the technical field of electrochemical energy storage materials, and discloses a gel polyelectrolyte, a preparation method and application and an aqueous zinc metal battery. The electrolyte is of a micron-sized micropore three-dimensional internet porous structure, and the three-dimensional internet porous structure is formed by copolymerization of polymer monomers; the polymer monomers are acrylamide and zinc 2-acrylamide-2-methylpropanesulfonate, the acrylamide provides a hydrophilic amide group, the hydrophilic amide group and a sulfonate group in the zinc 2-acrylamide-2-methylpropanesulfonate form a dynamic hydrogen bond network, the sulfonate group is covalently anchored to a polymer main chain, and the polymer main chain is covalently anchored to form a dynamic hydrogen bond network. And a main carrier Zn < + > is coordinated with-O-and-N-atoms on a polymer chain. According to the invention, salt-free single ion conduction is realized, concentration polarization is inhibited by sulfonate covalent anchoring, a dynamic hydrogen bond network provides excellent water-retaining property, the problem of moisture evaporation of traditional gel is solved, the interface stability is enhanced by coordination of Zn < + > and a polymer chain, the dendritic crystal inhibition effect is remarkable, and the ion transference number is far greater than that of traditional double-ion electrolyte.

The invention relates to the technical field of high polymer materials, in particular to a corrosion-resistant cable sheath material and a preparation method thereof. The sheath material is prepared by taking an ethylene-octylene copolymer as a matrix and compounding functional fillers such as an aminated magnesium ion exchange A type molecular sieve, dopamine shell silicon dioxide nanoparticles and phenylboronic acid / octadecyl double-grafted silicon dioxide nanoparticles. Wherein the aminated Mg-A molecular sieve is used for efficiently capturing and fixing chloride ions through an ion-dipole effect and a hydrogen bond network; the dopamine shell layer silicon dioxide enhances the interface bonding strength through dual active groups of catechol and amido; phenylboronic acid / octadecyl double-grafted silicon dioxide constructs a dynamic boric acid ester cross-linked network and a hydrophobic barrier, and synergistic protection of crack self-healing and moisture barrier is achieved. The sheath material remarkably improves the long-term corrosion resistance and mechanical stability of the cable in a severe environment.

The invention discloses a blue-light perovskite light-emitting diode based on a hydrogen bond network and a preparation method thereof, 3-(5-fluoropyridine-2-yl) acrylic acid hydrochloride molecules are added into a perovskite precursor solution, non-radiative recombination is reduced by passivating defects, and the molecules cooperate with ligands and octahedrons to construct the hydrogen bond network in the crystallization process, so that the blue-light perovskite light-emitting diode based on the hydrogen bond network is obtained. The stability of the octahedral framework is enhanced, ion migration is effectively inhibited, the high-efficiency and high-stability blue-light PeLED is finally obtained, and the external quantum efficiency and the operation stability of the blue-light PeLED are remarkably improved.

The invention discloses high-toughness self-repairing polyurethane based on a ureido / disulfide bond dual dynamic network and a preparation method of the high-toughness self-repairing polyurethane, and belongs to the technical field of self-repairing high polymer materials. The structural formula of the thermal stimulation repairing polyurethane is shown in the specification. The polyurethane is formed by mixing and polycondensing polyether amine, diaminodiphenyl disulfide and dicyclohexylmethane diisocyanate. According to the invention, polyether amine is used as a raw material, green synthesis without a catalyst is realized, ureido generated by the reaction forms a hydrogen bond network with extremely strong dynamic property and cooperates with a disulfide bond, a repair process is completed at 50 DEG C, the toughness can reach 40.55 MJ / m < 3 >, the fast recovery capability is realized, the material can be stretched to be 20 times of the original length, and the service life of the material is prolonged. Good network dynamic property is achieved at the room temperature, and high self-repairing efficiency is achieved at the room temperature.

The invention relates to the technical field of microcapsule preparation, and particularly discloses a microcapsule composition with a slow release function and a preparation method and application of the microcapsule composition. Soybean protein provided by the invention is subjected to three-stage hydrolysis to generate small molecule peptide and amino acid, and the small molecule peptide and amino acid can be interwoven with maltodextrin in a network structure; therefore, a compact and coherent composite wall material network structure is jointly constructed, erosion of gastric acid can be effectively resisted, and physical isolation protection is provided for probiotics. When the microcapsule enters an environment from neutral to alkalescent intestinal tracts, the pH value in the intestinal tracts is increased, and an original hydrogen bond network structure among molecules is damaged, so that an original compact gel network structure becomes loose and is greatly swelled; meanwhile, the hydrolyzed soybean protein can be further hydrolyzed under the action of intestinal trypsin and the like, the wall material structure of the microcapsule is gradually loosened, thalli are gradually released in the swelling-disintegration process, targeted slow release of the intestinal tract is achieved, and therefore the probiotic function of the microcapsule is achieved.

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

This invention discloses a cross-linked copolymer coating for negative electrodes, its preparation method, and its application, relating to the field of solid-state battery negative electrode protection technology. The coating is formed by in-situ copolymerization of a precursor composition consisting of carbonate monomers with unsaturated double bonds, hydroxyl-rich natural polymer derivatives, lithium salts, and an initiator. The rigid cellulose skeleton in the copolymer regulates the degree of polymerization of the carbonate monomers through a hydrogen bond network, forming a protective layer with a rigid-flexible block structure, resulting in a uniform and dense SEI film. The hydrogen bond anchoring effect of high-density hydroxyl and carbonyl groups inhibits polycarbonate segment degradation and improves interfacial chemical stability. The three-dimensional hydrogen bond network endows the coating with excellent mechanical strength and flexibility, synergistically buffering volume changes and inhibiting lithium dendrite growth. This preparation process is simple and controllable, effectively reducing the probability of battery short circuits and improving safety performance and cycle stability.

This application relates to the field of veterinary drug technology, and discloses a transdermal absorption-enhancing ointment and its preparation process. The ointment components include white petrolatum, anhydrous lanolin, caprylic / capric triglycerides, hydrophobic fumed silica, and a highly fluid active permeation-enhancing phase. The permeation-enhancing phase contains active drugs and soybean lecithin, which self-assemble to form an inverse micelle aggregate. Soybean lecithin cross-links with the silanol groups on the surface of silica to form an intermolecular hydrogen bond network, constructing a sterically hindered framework within a continuous lipid matrix to prevent the polar drug-loaded phase from permeating and separating upon heating. Simultaneously, the inverse micelle structure effectively improves the transdermal absorption rate of the drug. The preparation process controls the lipid crystallization kinetics through slow cooling under negative pressure and micro-shear dynamic rheology. This invention solves the problems of easy precipitation upon heating, low transdermal efficiency, and poor rheological properties in traditional ointments, resulting in a product with a stable physical structure and good pseudoplastic texture.

The invention discloses a transparent polyurethane elastomer as well as a preparation method and application thereof, and the preparation method comprises the following steps: reacting diisocyanate with polyester polyol under the action of a catalyst to generate an isocyanato-terminated polyurethane prepolymer; and reacting the polyurethane prepolymer with 2, 2 '-dithiobis (acethydrazide) in a first solvent, evaporating the first solvent, and curing to generate the transparent polyurethane elastomer. Through multiple synergistic effects of increasing molecular entanglement, inhibiting hard phase aggregation, promoting supramolecular network crosslinking, a compact hydrogen bond network and a high-hardness hard domain, the polyurethane elastomer has excellent mechanical strength and toughness and has certain self-repairing performance.

The invention relates to the field of lubrication of ball screws, in particular to long-life creep-resistant lubricating grease for a high-precision ball screw, which comprises the following components in parts by weight: 65 parts of polyolefin, 5-10 parts of pentaerythritol ester, 5-10 parts of isocyanate, 2-5 parts of amine chain extender, 5 parts of PTFE (polytetrafluoroethylene), 1.0-1.5 parts of diphenylamine, 0.1-0.5 part of 2, 4-diphenyl-1, 3-pentanediol monoisobutyrate, 0.1-0.5 part of antioxidant, 0.1-0.5 part of antioxidant and 0.1-0.5 part of lubricant. The composite material is prepared from the following components in parts by weight: 0.5 to 1 part of 2, 6-butylated hydroxytoluene, 1.5 to 2 parts of molybdenum isocaprylate, 0.5 to 1 part of molybdenum bis (2-ethylhexyl) dithiocarbamate, 1 to 2 parts of zinc dialkyl dithiophosphate, 3 parts of calcium petroleum sulfonate, 1 to 1.5 parts of polyisobutene, 0.2 to 0.5 part of benzotriazole and 0.1 to 0.3 part of polymethacrylate. The isocyanate comprises HDI and IPDI, and the amine chain extender comprises TETA and TEPA. According to the invention, isocyanate and the amine chain extender react to form a polyurea macromolecular chain, and a high-energy hydrogen bond network is formed, so that the lubricating grease has relatively high creep resistance; the anti-creep performance is further enhanced through cooperation with the PTFE particles; meanwhile, through cooperation with diphenylamine, the oxidation resistance is promoted, the consumption is reduced, and the service life of the lubricating grease is longer.

The present application relates to the technical field of concrete admixtures, in particular to a shrinkage-reducing admixture for concrete, a preparation method and application thereof.The preparation process of the present application overcomes the problems of poor alkali resistance of traditional admixtures and easy cracking of solidified concrete.The present application comprises the following steps: preparing a reducing initiator, a chain transfer agent, an unsaturated acid monomer, a shrinkage-reducing functional monomer and an amide functional monomer solution by step-by-step preparation, controlling the polymerization conditions under nitrogen protection, and obtaining a water reducing agent; using alkyl glycoside as a starter, step-by-step polymerizing propylene oxide and ethylene oxide to obtain a low-foaming polyether; mixing the water reducing agent and the low-foaming polyether with an alkali-resistant additive to obtain a shrinkage-reducing admixture; and significantly improving the water-reducing rate, flow retention and compressive strength of concrete, optimizing the setting time, reducing the dry shrinkage rate and the influence of alkali erosion, and improving the compactness and durability of concrete through hydrogen bond network, low surface tension and alkali resistance protection.The viscosity of the concrete admixture is moderate, which is suitable for concrete application, and the process is stable and easy to industrialize.

The application discloses a fluorine removal agent and a preparation method thereof, and relates to the technical field of fluorine removal agents, and comprises the following components in parts by weight: 5-10 parts of an aluminum salt, 5-10 parts of an iron salt, 15-20 parts of a rare earth material, sodium citrate and beta-cyclodextrin; the addition amount of the sodium citrate is 5%-10% of the total mass of the aluminum salt, the iron salt and the rare earth material; and the addition amount of the beta-cyclodextrin is 30%-50% of the mass of the sodium citrate. Through the introduction of the synergistic system of sodium citrate and beta-cyclodextrin, the metal ion precipitation sequence is regulated, meanwhile, the beta-cyclodextrin captures competitive anions through molecular recognition and constructs a hydrogen bond network to block interference, and the combination of the microsphere type and the porous particle type further realizes dynamic directional transmission of pollutants and nuclear pore limited crystallization, and the active site distribution is reconstructed at the molecular level, so that a technical scheme with universality, economy and reliability is provided for the treatment of complex fluorine-containing wastewater.

The invention relates to the technical field of polypropylene nucleating agents, and particularly discloses a polypropylene beta nucleating agent based on polythiourea and a preparation method and application thereof.The preparation method comprises the steps that under the nitrogen protection atmosphere, 1, 4-phenyl diisothiocyanate and an amino-terminated compound are added into a solvent, and a constant-temperature stirring reaction is conducted; after the reaction is completed, a reaction product is subjected to precipitation, filtration, impurity removal and drying, and a precipitate is obtained; and dissolving the precipitate in a solvent, forming a film, and then grinding or cutting into pieces to obtain the polypropylene beta nucleating agent. The polypropylene beta nucleating agent based on polythiourea prepared by the invention is a novel polypropylene beta nucleating agent containing a thiourea group, has unique hydrogen bond network and pi-pi accumulation effect, and can induce polypropylene to form a beta crystal form in a wide temperature range after polypropylene is melt-blended; the mechanical property and the electric breakdown resistance of the polypropylene material are improved. The preparation method is simple, low in production cost and suitable for large-scale industrial application.

The application discloses a kind of high toughness biomass-based composite film for liquid packaging and its preparation method and application, belong to biomass-based packaging material technical field.The composite film is ABA three-layer co-extrusion structure;A layer is composed of modified PLA, PBAT and lignin-containing cellulose nanofiber;B layer is composed of oligosaccharide modified polyester;A layer master batch and B layer material are prepared respectively, and three-layer co-extrusion molding is obtained.The application uses amide bond to covalently fix oligosaccharide on polyester main chain, solves the problems of existing technology, such as easy migration of antibacterial agent, weak interlayer bonding force and insufficient comprehensive performance;Through multivariate blending, the synergistic improvement of mechanical property and barrier property is realized by using multiple intermolecular forces;ABA three-layer co-extrusion structure is used, and interface firm combination is realized by means of interlayer molecular diffusion and hydrogen bond network.The obtained composite film has high toughness, excellent barrier property and antibacterial property, and is suitable for milk, fruit juice and other liquid food packaging.

The invention discloses a method for preparing a cationic flocculant based on ultraviolet-initiated homogeneous modification of cellulose, which comprises the following steps: dissolving a waste crop material at normal temperature by using a high-salt system to destroy a hydrogen bond network of cellulose, and then grafting an electropositive group on the cellulose in an ultraviolet-initiated graft copolymerization manner; a high-salt system is adopted to effectively destroy a cellulose hydrogen bond network, the dissolution efficiency of the cellulose is remarkably improved, high dissolution of cellulose can be achieved under the normal temperature condition, a cellulose material with the polymerization degree of 0-4000 can be dissolved, then positive electricity groups are introduced through photo-initiation graft copolymerization, the adsorption capacity of the cellulose to negative electricity pollutants can be enhanced, and the flocculation effect is improved. The technological method is simple, efficient, uniform and controllable, and meanwhile the economic cost is saved. The wastewater turbidity removal rate of the prepared flocculant can reach 99.8% or above, the dye removal rate of the prepared flocculant can reach 96.2% or above, and the UV254 removal rate of the prepared flocculant can reach 93.7% or above.

The invention provides an aqueous sodium-iodine dual-ion battery and a preparation method thereof, and belongs to the technical field of secondary batteries. The novel aqueous sodium-iodine dual-ion battery is constructed by taking activated carbon as a positive electrode material, carbon-coated titanium-based phosphate as a negative electrode material and a mixed solution containing iodized salt and sodium trifluoromethanesulfonate as an electrolyte. Sodium trifluoromethanesulfonate is introduced into the electrolyte, water molecules in a Na < + > primary solvation sheath are partially replaced by anion OTf <-> of sodium trifluoromethanesulfonate, a brand new [Na (H2O) 2 (OTf) 4] < + > mixed coordination structure is formed, a Na < + > desolvation energy barrier can be remarkably reduced through structural recombination, a hydrogen bond network among water molecules can be effectively destroyed, and the stability of the electrolyte is improved. Therefore, the ion migration rate is obviously improved. The water-based sodium-iodine dual-ion battery constructed on the basis has the advantages of high rate, long service life and high safety, and a breakthrough solution is provided for realizing low-cost and large-scale energy storage.

The invention provides a molecular interaction network protection system based on structural biology and an optimization method thereof, and relates to the technical field of biotechnology and molecular engineering.The molecular interaction network protection system comprises a USAG-1 protein binding domain, and the USAG-1 protein binding domain comprises a Glu32-Arg58-Ser76 hydrogen bond network and a Phe41 / Trp65 / Leu83 hydrophobic core; the MMP-9 cleavage site mutant is used for carrying out 20 substitutions from D to N / V / A in the PLGLA sequence, and is combined with G52S mutation; the ellipticity of the CD spectrum of the RGD peptide at 222nm is less than or equal to-15 mdeg, and the RGD peptide comprises a salt bridge at the i / i + 4 position. The USAG-1 protein binding domain also comprises an Asn45 carbohydrate chain, and the molecular weight of the Asn45 carbohydrate chain is 500 to 2000 Da. The phi angle of the RGD peptide is-57 + / -5 degrees, and the psi angle of the RGD peptide is-47 + / -5 degrees. According to the invention, through a multi-dimensional structure locking strategy, while the functional activity of biomolecules is maintained, accurate control of alpha-helical conformation is realized, a resistance mutation library is constructed, and the fundamental contradiction of stability-activity imbalance, conformation control misalignment and single-point mutation drug resistance in the traditional technology is thoroughly solved.

The invention discloses a waterproof UV (ultraviolet) curing coating and a preparation method thereof, trimethylolpropane triacrylate is used as a reactive diluent, 2-hydroxy-2-methyl-1-phenylacetone is used as a photoinitiator, polyurethane acrylate and modified filler are polymerized in the UV curing process of the coating, and a highly crosslinked waterproof UV curing coating is prepared. A perfluorocarbon chain structure and a hydrogen bond network are introduced into a polyurethane acrylate molecular chain, a molecular-level smooth super-hydrophobic layer is formed on the surface of the coating, and permeation of water molecules can be effectively blocked. The modified filler taking microcrystalline wax as a core and silicon dioxide as a shell is added, so that the wear resistance and scratch resistance of the coating can be remarkably improved, and meanwhile, the micro rough structure and the coating with low surface energy cooperatively construct a super-hydrophobic structure, so that the waterproof performance of the UV curing coating is improved.

This invention discloses a method for synthesizing styrene-based photoresist resin, comprising the following steps: adding styrene and p-tert-butoxystyrene to a DES solvent, ultrasonically dispersing the mixture, and then rapidly adding an initiator under an air atmosphere to obtain a styrene-p-tert-butoxystyrene copolymer, i.e., a styrene-based photoresist resin, via anionic polymerization. The preparation method of this invention is simple and the process is easy to control. Using DES as the polymerization solvent allows the reaction to proceed efficiently under ambient air atmosphere. Furthermore, the hydrogen bond network in DES can form a specific interaction with the oxygen atom in the p-tert-butoxy group, resulting in a significant stabilizing effect on this acid-sensitive protecting group and effectively suppressing the removal of the protecting group and the resulting side reactions during anionic polymerization.

The invention provides a preparation method of algae-based pure plain leather based on a dual-network gel system. According to the method, natural polysaccharide sodium alginate extracted from seaweed and xanthan gum obtained through microbial fermentation are used as raw materials, and a cross-linking reaction of the raw materials is accurately regulated and controlled to form a double-network structure formed by cross-linked alginate serving as a rigid network and a flexible xanthan gum hydrogen bond network; and the material is reinforced and toughened by utilizing the synergistic complementary characteristics of the two, and the size and deformation stability are kept. Meanwhile, the leather tanning fat liquoring principle is used for reference, and natural grease is introduced, so that the softness and durability of the material are effectively improved. According to the method, natural and renewable polysaccharide resources are adopted, animal components are not contained, and animal ethical problems and use of harmful chemicals are avoided. The method has the advantages of simple process, abundant raw materials, low cost, excellent mechanical properties of pure plain leather products, short production period, large-scale industrial production and wide market prospect, and particularly has the potential of becoming a green and environment-friendly substitute material in the fields of fashion and furniture.

The application discloses a liquid epoxy plastic packaging material for improving glue overflow on the back of a substrate and a method and application thereof, and relates to the technical field of electronic packaging materials. The liquid epoxy plastic packaging material comprises the following components in percentage by mass: 83-88% of micron-sized silicon dioxide, 0.2-0.8% of nano-sized silicon dioxide, 4-7% of an epoxy resin, 0.4-1.0% of a multi-functional epoxy active diluent, 6-8% of a curing agent, 0.2-0.8% of a stress release agent, 0.2-0.3% of a catalyst and 0.1-0.2% of carbon black. The silicon hydroxyls on the surface of the nano-sized silicon dioxide are used to construct a three-dimensional hydrogen bond network structure in the epoxy resin system, so as to improve the rheological viscosity of the liquid epoxy plastic packaging material. The multi-functional epoxy active diluent is used to make the epoxy resin system change from a viscous liquid to an elastic gel state more quickly, thereby limiting the glue liquid flow time. The flowability of the liquid epoxy plastic packaging material is adjusted by using the nano-sized silicon dioxide and the multi-functional epoxy active diluent, so as to inhibit glue overflow on the back during the packaging process of the liquid epoxy plastic packaging material and improve the reliability of device packaging.

This invention relates to a nitrogen-doped hard carbon material and its preparation method, belonging to the field of sodium-ion battery technology. The preparation method of this invention includes the following steps: S1, urea and a glycosyl carbon source are thoroughly mixed and heated to melt, then cooled to obtain a eutectic salt; S2, under a protective atmosphere, the eutectic salt is prepolymerized, pyrolyzed, and carbonized to obtain the nitrogen-doped hard carbon material. First, urea and a glycosyl carbon source form a eutectic salt. During this process, the strongly polar functional groups in the glycosyl carbon source form a hydrogen bond network with the amino and carbonyl groups in the urea. This hydrogen bond network can restrict the free movement of urea molecules and constrain their thermal decomposition path, thereby delaying and inhibiting premature decomposition of urea, while simultaneously improving the nitrogen retention rate. A three-stage heating program is used to achieve layered nitrogen doping. This segmented temperature control strategy constructs a layered doping mechanism of "first building a carbon framework, then introducing nitrogen atoms, and finally stabilizing the carbon framework structure."

The application discloses a preparation method of an amphiphilic low-temperature gel electrolyte for a zinc ion battery and application thereof, and belongs to the technical field of aqueous zinc ion batteries. The preparation method comprises the following steps: dissolving a zinc salt electrolyte in deionized water to obtain a zinc salt electrolyte solution, adding an amphiphilic additive and uniformly mixing; adding an acrylamide gel polymerization monomer, a crosslinking agent and an initiator to obtain a sol precursor; performing defoaming treatment on the sol precursor, and in-situ heating and polymerization under a closed condition to obtain a gel electrolyte. In the application, the polyoxyethylene long chain of the amphiphilic additive can effectively destroy the hydrogen bond network between water molecules, and reduce the phase transition temperature of the electrolyte system; the hydrophilic / hydrophobic space asymmetric structure of the additive can induce the spatial distribution rearrangement of the gel polymerization network, and form a microenvironment at the electrode / electrolyte interface, which is beneficial to inhibit side reactions, and effectively improve the problems of low ion conductivity, poor interface stability and insufficient electrochemical stability of the gel electrolyte under low-temperature conditions.