41results about How to "Rich sources" patented technology

The application discloses monodisperse lignin colloidal spheres and a preparation method and application thereof. The preparation method comprises the following steps: S1. lignin is dissolved in a mixed solution of glacial acetic acid and acetylation reagent, and stirring and heating are carried out to obtain a reaction solution containing acetylated lignin; the mass ratio of the lignin to the acetylation reagent is 1:2.2-3.3; S2. the reaction solution containing the acetylated lignin obtained in the step S1 is subjected to removal of excessive acetylation reagent and solvent to obtain acetylated lignin; S3. the acetylated lignin obtained in the step S2 is dissolved in an organic solvent-water mixed solvent, water is added dropwise, and centrifugal treatment is carried out to obtain monodisperse lignin colloidal spheres. The preparation process is simple, the yield of the acetylated lignin product reaches more than 90%, and the monodisperse (PDI<0.1) lignin colloidal spheres with adjustable size can be prepared; when the average particle size of the monodisperse lignin colloidal spheres is regulated to be below 350 nm, the photonic lignin colloidal spheres which can be used as structural color materials can be prepared.

The application discloses a preparation method of a silicate cement porous vegetation concrete material, and comprises the following steps: calcining coal-based kaolin to obtain activated coal-based kaolin; adding the activated coal-based kaolin and a water reducing agent into mixing water, and performing ultrasonic dispersion to form an activated coal-based kaolin suspension; weighing silicate cement, concrete recycled aggregates and fertilizer, and uniformly mixing to form dry materials; uniformly mixing the activated coal-based kaolin suspension and the dry materials, and loading into a mold for forming; and performing film covering and curing. The application is free from the low-alkalinity porous vegetation concrete system of a sulphoaluminate cement used in the preparation of a porous vegetation concrete in the prior art, and utilizes the activated coal-based kaolin after calcination and ultrasonic treatment as a main alkali-reducing agent to reduce the alkalinity of the silicate cement according to the condition that coal-based kaolin resources are rich, and the activated coal-based kaolin is matched with the fertilizer and the concrete recycled aggregates to provide a new material with rich raw material sources and low cost for ecological protection of a slope and a bank.

This invention proposes an impact-resistant seawall repair adhesive and its preparation method, belonging to the field of adhesive technology. The impact-resistant seawall repair adhesive is prepared from the following raw materials in parts by weight: 70-100 parts water glass, 30-40 parts sodium fluorosilicate, 5-10 parts ammonium chloride, 10-15 parts curing agent, 30-50 parts dimethyl silicone oil, 5-7 parts metal oxide, 2-4 parts emulsifier, and 100-120 parts water. This impact-resistant seawall repair adhesive is a silicate inorganic adhesive that can withstand extremely high temperatures and large tensile and shear forces. It boasts advantages such as high bonding strength with the substrate and abundant raw material sources, good stability, and convenient operation.

The application discloses a polymer probe and a preparation method and application thereof, and belongs to the technical field of chemical probes.The structural formula of the polymer probe provided by the application is shown as formula (I): in the formula (I), x and y are each independently selected from any integer in 1-3000.The polymer probe has good water solubility, obvious visual color change for sulfur dioxide and derivatives thereof, and can be used for qualitative or quantitative detection of sulfur dioxide and derivatives thereof in water; meanwhile, the polymer probe has thermal response performance, can be recycled and reused by heating after a reaction of the polymer probe with sulfur dioxide and derivatives thereof in an aqueous solution is completed, is used for secondary analysis and identification of sulfur dioxide and derivatives thereof, has good reusability, is favorable for cost reduction, and has wide application in detection of sulfur dioxide and derivatives thereof.

This invention discloses the application of awnless bromegranate extract in the prevention and control of bacterial leaf spot disease in peaches. The active ingredients in awnless bromegranate are extracted using an alkaline extraction and acid precipitation method, and the antibacterial component is obtained by column chromatography purification. The antibacterial component mainly contains p-coumaric acid and ferulic acid, with contents of 694.2 and 259.6 mg / g, respectively. The antibacterial component and its main components exhibit good antibacterial activity against the pathogen of peach bacterial leaf spot disease (Xanthomonas arboricola pv. pruni, Xap). The minimum inhibitory concentrations (MICs) of the antibacterial component, p-coumaric acid, ferulic acid, and the positive control drug oxytetracycline are 0.25, 0.0625, 0.50, and 0.125 mg / mL, respectively. The advantages compared to existing technologies are: awnless bromegranate is abundant, the preparation method of the antibacterial component is simple, and the inhibitory activity of its main component against coumaric acid is superior to that of oxytetracycline.

The present application relates to a preparation process of isotropic pitch and high softening point coating pitch, which uses aromatic oil as raw material oil, and bio-tar or / and bio-pitch as co-carbonization agent. The pre-polymer material is obtained by pre-polymerization reaction of the bottom into the pre-polymerization reactor under the induction of oxygen-containing linear polymer. The photosensitive oxidation crosslinking agent is added to the pre-polymer material, the material distribution tray in the middle of the oxidation crosslinking reaction tower is fed, and the oxidation crosslinking gas enters from the lower part of the crosslinking reaction tower through the gas distributor. The obtained crosslinking pitch product is discharged from the bottom of the reaction tower. The crosslinking pitch then enters the middle of the polymerization reactor, and the polycondensation reaction occurs under the induction of high-energy electron beam irradiation. The polycondensation pitch product is obtained from the lower part of the polymerization reactor. The polycondensation pitch product enters the upper part of the extraction separation tower, and the sub / supercritical solvent enters the lower part of the extraction separation tower. The two-phase countercurrent contact extraction separation is carried out, and the isotropic pitch and high softening point coating pitch are obtained after the extraction solvent is separated.

The application belongs to the technical field of retanning agent preparation, and particularly relates to an environment-friendly melamine resin retanning agent and a preparation method thereof. Oxidized starch is prepared by using raw materials including starch, hydrogen peroxide and sodium persulfate; then the oxidized starch is mixed with raw materials such as melamine, dicyandiamide, urea, formaldehyde and sodium sulfamate to prepare a retanning agent prepolymer; finally, sodium alginate intercalated LDHs and polyethylene glycol are added, and after mixed reaction, the environment-friendly melamine resin retanning agent is prepared by spray drying, which can effectively improve the softness and thickening rate of leather and reduce the content of free formaldehyde.

The application discloses a method for modifying graphite felt electrodes with manganese dioxide nanoparticles and application. The method comprises the following steps: using an electrochemical method and selecting an ammonium sulfate electrolyte to pretreat graphite felt to improve the surface wettability; continuing to use the electrochemical method and selecting a DMF dispersion solution of graphene to etch the pretreated graphite felt to obtain a three-dimensional porous graphite felt; finally, using a hydrothermal reaction to make manganese dioxide nanoparticles directly generate on the surface and inside of the three-dimensional porous graphite felt to obtain a porous carbon fiber confined manganese dioxide nanoparticle modified graphite felt electrode. The method confines manganese dioxide nanoparticles with high catalytic activity in the porous carbon fibers of the graphite felt electrode material, the heterostructure has rich hierarchical pores and high specific surface area, the number of active sites on the surface of the graphite felt electrode material is increased, the electrochemical activity of the graphite felt electrode is significantly improved, and an organic aqueous solution flow battery assembled therefrom has good electrochemical performance.

This invention belongs to the field of environmental protection and resource recycling technology, specifically relating to a method for preparing high-purity basic magnesium carbonate from low-grade magnesite. The method includes the following steps: S1, crushing the low-grade magnesite and mixing it with an acid solution for acid leaching to obtain an acid leaching solution; S2, removing impurities from the acid leaching solution to obtain a refined solution; S3, absorbing the carbon dioxide gas released during the acid leaching step using an absorbent to obtain a carbon dioxide-loaded solution; S4, mixing the refined solution and the carbon dioxide-loaded solution for precipitation to obtain basic magnesium carbonate product and a protonated absorbent solution; S5, recovering the acid and regenerating the absorbent solution from the protonated absorbent solution using a bipolar membrane electrodialysis device. This invention utilizes the CO2-loaded solution as a precipitant to react with the Mg in the refined solution. 2+ The reaction produces basic magnesium carbonate. The reaction conditions are mild, and the crystal morphology and particle size are easy to control, thus obtaining a high-value-added product that meets market demands.

This invention relates to the field of carbon material preparation technology, specifically disclosing a method for preparing porous carbon materials using a hierarchical synergistic activation method and its application. This method uses waste biomass from *Siraitia grosvenorii* pomace as raw material, sequentially undergoing low-temperature pre-activation, water washing, high-temperature synergistic activation, and isothermal acid washing to obtain porous carbon materials with ultra-high specific surface area. Scanning electron microscopy analysis and pore structure detection results show that the carbon material exhibits a hierarchical porous layered structure. Electrochemical tests show that the material possesses excellent capacitance performance, with a specific capacitance reaching 200-450 F / g at a current density of 0.5 A / g. When this porous carbon material is assembled into a symmetrical supercapacitor, after 10,000 cycles at a current density of 10 A / g, the specific capacitance retention rate remains above 90%, demonstrating good cycle stability and showing promising application prospects in the field of energy storage.

The present application relates to the technical field of wound dressing material, and in particular to a preparation method and application of a glycosylated (galactose-tyrosine-Fmoc) chitosan derivative.The glycosylated (galactose-tyrosine-Fmoc) chitosan derivative is synthesized through Fischer reaction, nucleophilic substitution reaction, addition-elimination reaction and the like.The compound can form a hydrogel, and the hydrogel not only has good selective sterilization effect on pseudomonas aeruginosa, but also has broad-spectrum sterilization activity and hemostatic function, and has a broad application prospect in the field of wound dressings.

This invention belongs to the field of fuel cell catalysis, specifically relating to a preparation method and application of a platinum-based alloy-rare earth oxide La2O3 hybrid interface catalyst. The specific preparation method includes the following steps: (1) preparing a carbon support material via oxidative polymerization and high-temperature pyrolysis; (2) loading a metal component onto the carbon support material via co-precipitation-impregnation; (3) subjecting the metal-loaded support to high-temperature heat treatment under a reducing atmosphere to finally obtain the catalyst. The preparation process of this invention is safe, simple, and low-cost. By reducing the platinum loading, the problem of high raw material costs is further solved. The half-wave potential of this invention reaches 0.876V, and the mass activity reaches 1.48 A·mg. ‑1 Pt @0.9V, which is 12.3 times the mass activity of commercial 40% Pt / C catalysts, indicating that it has superior oxygen reduction catalytic activity; in addition, after 60,000 cycles of cyclic voltammetry testing, its half-wave potential only decreased by 13 mV, indicating that the present invention has excellent long-term cycling stability.

The application discloses a super-long chain glucose amide nonionic surfactant and a synthesis method thereof. The hydrophobic tail chain of the surfactant is derived from plant-based fatty acids such as oleic acid, erucic acid or nervonic acid, and the hydrophilic head group is derived from glucose derivatives such as meglumine and glycolglucamine. With oleic acid, erucic acid and nervonic acid in rapeseed by-product as hydrophobic tail chain raw material, glucose derivatives meglumine and glycolglucamine as hydrophilic head group raw material, methanol, ethanol, ethylene glycol or propylene glycol (single solvent or binary mixed solvent) as solvent, and DMAP or NaF as catalyst, a kind of bio-based surfactant is obtained. The super-long chain glucose amide nonionic surfactant is prepared by selective amination reaction, the hydroxyl group in the glucose amine molecule does not need to be protected complicatedly, the reaction temperature is close to room temperature, the operation is simple, and the purification process only needs a simple industrial crystallization method, which is suitable for industrial production.

This invention discloses a ternary heterojunction photocatalyst, its preparation method, and its application. The catalyst comprises carbon nitride, graphylene, and Cu. x O is a composite, and GDY is mediated by C3N4 and Cu. x A ternary heterostructure is formed between O atoms. GDY utilizes its natural channels to polarize C-F bonds through C-F···π interactions, while simultaneously acting as an electron transport channel to promote the transfer of photogenerated electrons from C3N4 to Cu. x O migration enables a relay-style synergistic catalysis involving adsorption-polarization-electron injection-bond breaking. This catalyst is prepared using a one-pot in-situ growth method, simplifying the process. Under visible light irradiation, this catalyst efficiently catalyzes the defluorination and amination of aryl fluorides with amine sources, achieving yields of 87%-98%. It possesses advantages such as a broad substrate range, good functional group tolerance, easy catalyst recovery, absence of precious metals, and suitability for large-scale applications, belonging to the fields of photocatalytic materials and organic synthesis technology.

The application discloses diatomite-derived silicon-carbon negative electrode material and a preparation method thereof and application in lithium ion batteries, and belongs to the technical field of lithium ion battery negative electrode materials. The method discloses the diatomite and the pitch as raw materials by adopting magnesium heat treatment, and the diatomite-derived silicon-carbon negative electrode material is obtained through specific composite process and calcination treatment. The method can uniformly coat the carbon material on the inner and outer surfaces of the porous micron-sized silicon negative electrode, solves the technical problems of the existing silicon-carbon negative electrode material nano-particle agglomeration and the carbon material coating only on the outer surface, and achieves the beneficial effects of further improving the conductivity and structural stability of the composite material.

This invention relates to a putty adhesive for interior building decoration and its preparation method. The putty adhesive for interior building decoration comprises the following raw materials: soy protein isolate, polyvinyl alcohol, urea, silica sol, coupling agent, and water. This invention also provides a method for preparing the putty adhesive for interior building decoration according to this invention, comprising the following steps: adding soy protein isolate to water, adjusting the pH value with sodium hydroxide, then adding urea, heating to react, and obtaining a soy protein modified liquid; adding polyvinyl alcohol to water, heating, and cooling to obtain a polyvinyl alcohol aqueous solution; mixing the soy protein modified liquid and the polyvinyl alcohol aqueous solution, adding silica sol and a coupling agent, polymerizing, and cooling to obtain the putty adhesive for interior building decoration. This invention solves the problem that existing putty adhesives for interior building decoration contain formaldehyde, which pollutes the environment and affects human health.

The embodiment of the invention provides a motion information determination method and device for inter-frame prediction, electronic equipment and a storage medium, and relates to the technical field of video coding. The method comprises the following steps: determining a plurality of reference blocks corresponding to a target coding block; in response to the reference block in an inter-frame prediction mode, acquiring corresponding first motion information as a motion information candidate; in response to the fact that the reference block is in the intra-frame prediction mode, acquiring second motion information selected during inter-frame prediction as a motion information candidate; generating a motion information candidate list of the target coding block; and performing distortion estimation on the motion information candidates in the motion information candidate list through distortion estimation search, and determining target motion information of the target coding block. According to the method, potential and valuable motion clues of motion information selected by an intra-frame prediction reference block during inter-frame prediction are mined. Therefore, the source of the candidate list is enriched, the quality of the motion estimation starting point can be effectively improved, and the compression efficiency and the coding speed are improved.

This invention discloses carbon-based silica composite materials, high-impact, low-VOC resin composite materials, their preparation methods, and applications. The carbon-based silica composite material of this invention is a carbon-based silica composite material with silica loaded on the surface of activated carbon fibers. After in-situ synthesis of silica on a carbon source matrix, the composite material is obtained through high-temperature carbonization. This invention utilizes carbon and silicon sources as raw materials to synthesize, in-situ, a mixture containing carbon source and SiO2 in a liquid-phase system. 2 The composite material was then subjected to hydrothermal carbonization to prepare a material containing SiO2. 2 The composite component is composed of activated carbon fiber. The carbon-based silica composite material prepared by this invention has a high specific surface area and excellent adsorption performance. When added to resin as a filler, it can significantly improve the VOC release of the material and at the same time improve the impact resistance of the resin material.

The application discloses a preparation method of mixed carbon source derived hierarchical porous carbon. The steps of the preparation method of the mixed carbon source derived hierarchical porous carbon are as follows: firstly, starch and disaccharide are added into N-methylmorpholine-N-oxide aqueous solution and heated to be dissolved; the obtained mixture is melt-blended and extruded through a double screw extruder to prepare uniform mixed granules; then, the granules are subjected to pre-carbonization treatment to obtain a carbon precursor; the carbon precursor is ground into powder, mixed with an activating agent aqueous solution, dried, and subjected to activation carbonization at high temperature; finally, the carbonized product is subjected to acid pickling, water washing and drying to obtain the mixed carbon source derived hierarchical porous carbon electrode material. The disaccharide is white granulated sugar or maltose. The preparation method realizes uniform compounding of multiple carbon sources by using a melt-blending process, has the advantages of easy availability of raw materials and easy scale production, and the prepared product shows excellent electrochemical performance and good cycle stability.

This invention belongs to the field of nanocomposite material preparation and application technology, and discloses a method for preparing and applying a dendritic ternary SrCO3-TiO2 / CdS composite material. First, SrCO3-TiO2 nanoparticles are synthesized using a simple hydrothermal one-pot method with tetrabutyl titanate and Sr(NO3)2 as raw materials. These nanoparticles are then dispersed in deionized water to form a suspension. Finally, a dendritic ternary SrCO3-TiO2 / CdS composite material is prepared using an in-situ hydrothermal growth method. The dendritic ternary SrCO3-TiO2 / CdS composite material prepared by this invention can be used to produce hydrogen peroxide under visible light and simultaneously degrade oxytetracycline. The dendritic ternary SrCO3-TiO2 / CdS composite material prepared by this invention forms a unique dendritic structure by combining SrCO3-TiO2 composite particles with CdS. By utilizing the synergistic effect among the three, the transport and separation of photogenerated electron pairs at the interface are accelerated, and their recombination is effectively inhibited, thereby improving the catalytic activity of the dendritic ternary SrCO3-TiO2 / CdS composite material. It has broad application prospects in the synthesis of green chemicals and water pollution treatment.

The invention relates to ultraviolet-cured high-viscoelasticity ionic conductive hydrogel as well as a preparation method and application thereof, and belongs to the technical field of functional polymer materials and bioelectronics. According to the hydrogel, an ultraviolet light sensitive zwitterionic monomer (SBMA), a high-density cationic monomer (DMDMAC), a cross-linking agent (PEGDA) and a photoinitiator are selected, and under the ultraviolet light exposure condition, the photoinitiator is decomposed to generate active free radicals to trigger a cross-linking polymerization reaction. The hydrogel has a three-dimensional network structure, integrates softness, high stretchability, strong tissue adhesion and high conductivity, and has fracture tensile strain gt; the adhesive strength is gt; and the ionic conductivity can reach 2.24 S / m. The preparation process is simple, rapid in-situ forming of the hydrogel on the skin surface can be achieved, the flexible biological electrode prepared based on the hydrogel has low skin-electrode interface impedance, motion artifacts are effectively inhibited, and the flexible biological electrode is suitable for long-term, dynamic and high-signal-to-noise-ratio biological electric signal monitoring and has good application prospects. And good biocompatibility and wearing comfort are achieved.

The application discloses a vehicle risk prediction method, system, device and storage medium, relates to the technical field of intelligent transportation and Internet of Vehicles, and comprises the following steps: collecting real-time signals of vehicles, predicting a road icing probability through a Stacking model trained by updating soft labels based on Bayes, mapping the icing probability into a multi-level early warning, and outputting early warning information; analyzing vehicle state data by using a clustering algorithm, identifying a high-risk icing area and defining a spatial range, and finally directing early warning information to target vehicles in the area. The scheme combines real-time signals of vehicles and soft labels optimized by updating Bayes, trains a Stacking model, improves the prediction accuracy of the road icing probability, mines the clustering characteristics of vehicle states by using a clustering algorithm, accurately identifies and delimits a high-risk icing area, provides support for cross-area risk pushing, and grades the output of early warning content by matching a multi-level early warning mapping mechanism, so that the data source can be enriched and the early warning accuracy can be improved.

The application discloses a temperature response adhesion intelligent gelatin-based conductive hydrogel and a preparation method and application thereof. The hydrogel takes methacrylated gelatin as a main skeleton component, takes polymeric gallic acid as a temperature response functional component, and takes PEDOT:SCS-SH as a conductive unit. In an aqueous system, in-situ radical polymerization is conducted under the initiation of ammonium persulfate / tetramethylethylenediamine to construct a multiple cross-linking network structure. The methacrylated gelatin forms a continuous chemical covalent cross-linking network as a main skeleton. The polymeric gallic acid interacts with the skeleton network through dynamic hydrogen bonds to endow the material with temperature-dependent adhesion regulation characteristics. The PEDOT:SCS-SH is embedded in the system to form an electron-ion synergistic conductive path. The hydrogel obtained in this way has good flexibility, mechanical stability, electrical conductivity and temperature response adhesion performance, and is suitable for fields of flexible sensors, wearable electronic devices and biological interface attachment materials.

The invention discloses a binder for a positive pole piece as well as a preparation method and application of the binder. The adhesive comprises a rigid framework component, a flexible link component and an interface anchoring component, and is a composite adhesive system with a three-dimensional network structure. The preparation method comprises the following steps: uniformly dispersing the rigid framework component in water, sequentially adding the flexible linking component and the interface anchoring component, and uniformly mixing to obtain the adhesive. The binder can be applied to the Prussian blue type positive pole piece, the Prussian blue type positive pole piece comprises a current collector and an active substance layer coated on at least one side surface of the current collector, and the active substance layer comprises a Prussian blue type positive pole material, a conductive agent and the binder. The binder provided by the invention solves the problems of low peeling strength, poor flexibility, easy layering during baking and the like of the Prussian blue positive pole piece, and the prepared positive pole piece has excellent mechanical properties and electrochemical properties, and is suitable for the field of sodium ion batteries.

The application provides a composite porous fiber aerogel and a preparation method and application thereof, and belongs to the field of functional materials. Polyvinyl alcohol and sodium lignosulfonate are dissolved in water to obtain a PVA solution and an LS solution; the PVA solution and the LS solution are uniformly mixed in proportion to obtain a spinning dope; the spinning dope is atomized into droplets and sprayed into a uniform-speed stirring coagulation bath, so that the droplets form fibers under the stirring and drawing action of the coagulation bath, and solvent-non-solvent exchange and phase separation occur simultaneously to form nascent composite porous fibers; the nascent composite porous fibers are placed in a coagulation bath containing a crosslinking agent for crosslinking treatment and phase separation to obtain crosslinked composite porous fibers, and the crosslinked composite porous fibers are subjected to dispersion, freezing and freeze-drying treatment to obtain the composite porous fiber aerogel. The covalent compounding of polyvinyl alcohol and sodium lignosulfonate and the multi-level pore structure enable the composite porous fiber aerogel to have high adsorption capacity for positive proteins and excellent regeneration performance.

The application discloses a kind of multilayer biomass cellulose adsorption materials and its preparation method and application, belong to biomass material and sewage treatment technical field.The application first obtains PEI-cellulose by polyethyleneimine modification to biomass cellulose;Then PEI-cellulose and chitosan are crosslinked to prepare surface layer adsorption liquid;While unmodified biomass cellulose and polyvinyl alcohol are mixed to prepare middle layer adsorption liquid;Finally, by layer liquid nitrogen freeze forming, freeze drying and alkali washing treatment, obtain the biomass cellulose adsorption material with sandwich multilayer structure.The multilayer adsorption material prepared by the application has positive electricity on outer layer, can be efficiently adsorbed by electrostatic effect in water with negative electricity micro / nano plastic;Middle layer is neutral, can be used to adsorb organic pollutants carried by micro / nano plastic.The material of the application is low in cost, simple in preparation process, fast in adsorption rate, high in removal rate and reusable, and has good application prospect in water treatment field.

The application discloses a kind of alginate-based high-entropy metal oxides and preparation method and application thereof, belong to gas sensor material technical field.The application uses the high-entropy metal salt solution of at least five kinds of metal sources and alginate solution is mixed, and alginate-based high-entropy metal aerogel is prepared, and then carbon cloth is wrapped, and nanometer sheet-shaped alginate-based high-entropy metal oxide is obtained by using Joule heating method rapid heating.The material can be used for high-sensitivity detection of ethanol gas.The preparation method in the application is green, simple, fast, has good sensing response effect in ethanol gas detection, and the sensing material has good stability, can be recycled multiple times, and has good application prospect.

A porous hollow spherical photonic crystal sensor for detecting xylene gas and a method thereof, comprising synthesizing PS@SiO2 core-shell colloids, assembling into spherical photonic crystals by microfluidics, calcining to remove the polystyrene inner core to form a hollow SiO2 structure, and introducing a porous structure by controllable chemical etching. Subsequently, functionalization is performed by using P(VBC-co-MMA) to obtain a porous hollow spherical photonic crystal sensor, which is endowed with strong molecular affinity for xylene, and selective gas adsorption of the porous photonic crystal is realized. Benefiting from the super-symmetrical spherical structure, the obtained photonic crystal sensor exhibits an inherent angle-independent optical response, overcoming the limitation of angle dependence of thin film photonic crystal sensors. Exposure to xylene gas shows a significant reversible red shift of the optical stop band and a clear color change, which is due to the increase of the effective refractive index caused by vapor diffusion and adsorption. By monitoring the movement of the optical stop band in air and saturated xylene, visual detection of xylene gas can be realized.

This invention discloses a method for preparing carbon aerogel using water-soluble resin as a precursor. A reaction solution is prepared using water-soluble resin, aldehydes, an alkaline catalyst, and distilled water. Cyclodextrin, a pore-forming agent, is added to the clarified reaction solution. The reactants are then fed into a rapidly stirred oil phase, sheared into uniform micron-sized particles, and gelled at elevated temperatures to obtain a powder suspension. The suspension is centrifuged or filtered to obtain a powder, which is repeatedly washed with hot ethanol and then separated to obtain a powder material. The dried powder material is added to a carbonization furnace for carbonization to obtain carbon aerogel powder. The carbon aerogel powder is then added to a box-type atmosphere furnace and CO2 is introduced to obtain activated carbon aerogel powder with a porous network structure. This invention has the advantages of wide availability of raw materials and low production cost, making it suitable for large-scale industrial production, especially for the fabrication of supercapacitor electrodes, lithium-ion electrodes, and lithium-sulfur electrodes.

The application belongs to the technical field of biological medicine, and particularly relates to a preparation method and application of a polyketide compound from a fungus of the genus Arenarius. The polyketide compound can dose-dependently reduce the NO generation level in cells, significantly inhibit M1 phenotype polarization and promote the conversion of the M1 phenotype to the M2 phenotype, significantly down-regulate the expression of key inflammatory-related proteins (including IL-1beta, IL-6, TNF-alpha and COX-2) in cells, and inhibit the generation of NLRP3 inflammasome and caspase-1, revealing the potential anti-AD activity and indicating that the polyketide compound has a good application prospect in the preparation of anti-neuroinflammatory drugs. In addition, the polyketide compound can be prepared from a marine microorganism Arenarius fungus, and the preparation method is simple and the source is rich.