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718 results about "Bacterial cellulose" patented technology
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Bacterial cellulose is an organic compound with the formula (C₆H₁₀O₅)ₙ produced by certain types of bacteria. While cellulose is a basic structural material of most plants, it is also produced by bacteria, principally of the genera Acetobacter, Sarcina ventriculi and Agrobacterium. Bacterial, or microbial, cellulose has different properties from plant cellulose and is characterized by high purity, strength, moldability and increased water holding ability. In natural habitats, the majority of bacteria synthesize extracellular polysaccharides, such as cellulose, which form protective envelopes around the cells. While bacterial cellulose is produced in nature, many methods are currently being investigated to enhance cellulose growth from cultures in laboratories as a large-scale process. By controlling synthesis methods, the resulting microbial cellulose can be tailored to have specific desirable properties. For example, attention has been given to the bacteria Acetobacter xylinum due to its cellulose's unique mechanical properties and applications to biotechnology, microbiology, and materials science. Historically, bacterial cellulose has been limited to the manufacture of Nata de coco, a South-East Asian food product. With advances in the ability to synthesize and characterize bacterial cellulose, the material is being used for a wide variety of commercial applications including textiles, cosmetics, and food products, as well as medical applications. Many patents have been issued in microbial cellulose applications and several active areas of research are attempting to better characterize microbial cellulose and utilize it in new areas.
High-pressure-resistant in-situ polymerization quasi-solid electrolyte membrane as well as preparation method and application thereof
The invention relates to the technical field of lithium battery polymer solid electrolyte materials, and discloses a high-pressure-resistant in-situ polymerization quasi-solid electrolyte membrane as well as a preparation method and application thereof. The preparation method comprises the following steps: carrying out esterification reaction on bacterial cellulose and 2-bromoisobutyryl bromide to obtain bromine-modified bacterial cellulose, grafting a double-block polymer side chain on the surface of the bromine-modified bacterial cellulose to obtain a one-dimensional polymer brush, and preparing a one-dimensional polymer brush film; a one-dimensional polymer brush film is used as a supporting film, an in-situ polymerization precursor solution is dropwise added to the surface of the supporting film, and the high-pressure-resistant in-situ polymerization quasi-solid electrolyte film is obtained through in-situ ring opening polymerization. The prepared high-pressure-resistant in-situ polymerization quasi-solid-state electrolyte membrane has excellent mechanical performance, the thickness of polymer electrolyte can be reduced, and growth of lithium dendrites can be inhibited; the rich pore structure is beneficial to rapid transmission of lithium ions; and the block in the side chain is beneficial to lithium ion transmission and lithium metal uniform deposition, and improves the stability of the electrolyte membrane in a high-voltage environment.
Owner:SUN YAT SEN UNIV
Biosynthesis of hierarchical metal organic framework-bacterial cellulose composites
Composites of metal-organic framework particles and bacterial cellulose, methods of making the composites, and methods of using the composites in the hydrolysis of organic compounds are provided. The composites, which are aerogels comprising metal-organic framework particles embedded in a bacterial cellulose nanofiber network, are fabricated using a microbial synthesis strategy in which bacterial cellulose nanofiber is biosynthesized using a cellulose-producing bacteria in a fermentation medium in which metal-organic framework particles are dispersed.
Owner:NORTHWESTERN UNIV +1
Composite solid electrolyte diaphragm, preparation method and lithium ion battery
ActiveCN119542675AImprove liquid absorption capacityeffective migrationSecondary cellsCell component detailsSolid state electrolyteElectrical battery
The invention discloses a composite solid electrolyte diaphragm which comprises a bacterial cellulose membrane, fluorinated metal modified PEO electrolyte particles and functional group modified particles, and the fluorinated metal modified PEO electrolyte particles and the functional group modified particles are loaded in a three-dimensional network structure of the bacterial cellulose membrane. The functional group modified particles are functional group modified silicon dioxide particles and functional group modified LATP particles, the functional group modified silicon dioxide particles uniformly wrap the functional group modified LATP particles, and fluorinated metal of the fluorinated metal modified PEO electrolyte particles is combined with functional groups of the functional group modified particles through coordinate bonds. The invention also discloses a preparation method of the electrolyte diaphragm and a battery with the electrolyte diaphragm. The ionic conductivity of the electrolyte diaphragm is improved.
Owner:CHANGSHU INSTITUTE OF TECHNOLOGY
Bio-based degradable photocatalytic film and preparation method thereof
ActiveCN120205231AOrganic-compounds/hydrides/coordination-complexes catalystsCatalyst activation/preparationBlow moldingPolymer science
The invention relates to the field of forming preparation of plastic state materials, in particular to a bio-based degradable photocatalytic film and a preparation method thereof. The invention provides a ternary composite system taking bacterial cellulose as a framework, chitosan as an interface adhesive and doped titanium dioxide as a photocatalytic active component, and continuous production of the film is realized by adopting an extrusion blow molding process for molding a plastic state material. The degradable photocatalytic film prepared by the method is high in mechanical property, high in photocatalytic capacity and rapid and thorough in degradation under natural conditions.
Owner:SICHUAN UNIV
Anti-pilling wool fabric and treatment method thereof
PendingCN119411389Areduce slipreduce entanglementBiochemical treatment with enzymes/microorganismsAbrasion resistant fibresSILK SERICINPulp and paper industry
The invention provides an anti-pilling wool fabric and a treatment method thereof, and belongs to the technical field of wool fabric processing. According to the treatment method for improving the anti-pilling performance of the wool fabric, the wool fabric with the anti-pilling performance is obtained, and the problems that in the prior art, in order to prevent pilling of the wool fabric, protease is used for treating the wool fabric, the efficiency is too low, and industrialization cannot be achieved are solved. Through the synergistic effect of the bacterial cellulose and the sericin, the anti-pilling performance of the wool fabric is improved, and the method is easy and convenient to operate, high in efficiency and suitable for industrial production.
Owner:CHANGSHU INSTITUTE OF TECHNOLOGY
Polyimide film with low thermal expansion coefficient and preparation method thereof
The invention relates to the technical field of polyimide materials, and discloses a polyimide film with a low thermal expansion coefficient and a preparation method thereof, the polyimide film comprises the following raw materials by mass: 6-10 parts of dianhydride, 6-10 parts of diamine, 3-5 parts of a composite reinforcing filler, and 80-120 parts of a polar solvent. The composite reinforcing filler contains a modified layered composite material, and the in-situ synthesized silicon carbide nanowire can be connected with the layered composite material in disordered distribution to form a three-dimensional network structure, so that a heat conduction path is remarkably enhanced, and the thermal expansion coefficient of the polyimide film is reduced; the formed three-dimensional network structure containing the silicon carbide nanowires can absorb and weaken gravitation generated by external force, the mechanical strength is improved, in addition, the composite reinforcing filler comprises bacterial cellulose and chitosan, and can be combined with polyimide resin through hydrogen bonds, so that the composite reinforcing filler is uniformly distributed in the polyimide resin, and the mechanical strength is improved. The prepared polyimide film has excellent heat-conducting property and lower thermal expansion coefficient.
Owner:TAIHU JUZHI NEW MATERIAL TECH CO LTD
Sound insulation coating, sound insulation glass and preparation method of sound insulation glass
PendingCN119639318ASimple preparation processlow costPolycarbonate coatingsPolymer scienceWeather resistance
The invention provides a sound insulation coating, sound insulation glass and a preparation method thereof. The sound insulation coating comprises the following components in percentage by weight: 15%-35% of a high-molecular polymer, 3%-12% of an inorganic filler, 1%-10% of a cellulose dispersion liquid, 55%-70% of a solvent, 0.1%-1% of an auxiliary agent and 0.5%-1% of a coupling agent, wherein the inorganic filler comprises a hollow inorganic filler; the cellulose dispersion liquid comprises bacterial cellulose dispersion liquid and / or cellulose nanofiber dispersion liquid. The invention further provides sound insulation glass which is provided with a sound insulation coating formed by the sound insulation coating. The sound insulation coating provided by the invention has the advantages of light weight, good sound insulation, good weather resistance and the like, so that the sound insulation coating is suitable for sound absorption and noise reduction of vehicle glass such as automobile glass.
Owner:FUYAO GLASS IND GROUP CO LTD
Biosynthetic bacterial cellulose-based solid electrolyte as well as preparation method and application thereof
PendingCN121528999AMicroorganism based processesLi-accumulatorsSolid state electrolyteElectrochemical window
The invention discloses a biosynthetic bacterial cellulose-based solid electrolyte as well as a preparation method and application thereof, and belongs to the technical field of solid electrolytes. The solid electrolyte is prepared by taking modified bacterial cellulose prepared by fermenting acetobacter xylinum, rhizobium, pseudomonas, azospirillum, alcaligenes and other bacteria as a substrate, introducing a low-molecular-weight polymer to regulate and control the arrangement of cellulose molecular chains to serve as a conductive ion framework, and then compounding a conductive ion high-molecular-weight polymer and a lithium salt. According to the invention, cellulose molecular chains are modified by modified glucose, and a network structure is regulated and controlled by a low-molecular-weight polymer, so that the problems of small spacing, lack of ion coordination sites and weak ion transmission capability of pure cellulose molecular chains are effectively solved, the ionic conductivity of the prepared solid electrolyte can reach 10 <-4 > S cm <-1 >, the electrochemical window width reaches 5V, and the solid electrolyte has a good application prospect. The material can tolerate high critical current density, is suitable for various positive electrode materials, and is suitable for high-voltage and long-cycle-life energy storage devices.
Owner:HUAZHONG AGRI UNIV
Lignin-based flame-retardant bacterial cellulose gel polymer electrolyte, preparation and application
PendingCN120184358AElectrolyte accumulators manufactureElectrolyte immobilisation/gelificationPolymer electrolytesMicrobiology
The invention provides a lignin-based flame-retardant bacterial cellulose gel polymer electrolyte, preparation and application, the lignin-based flame-retardant bacterial cellulose gel polymer electrolyte is prepared by compounding a modified lignin material, a composite lithium salt and bacterial cellulose, when the polymer electrolyte is greater than or equal to 700 DEG C, the carbon residue rate is greater than or equal to 49.52%, the heat release rate peak value is less than or equal to 61.12 kW m <-2 >, and the flame-retardant bacterial cellulose gel polymer electrolyte has a good flame-retardant effect. The smoke release rate peak value is less than or equal to 0.0089 m < 2 > s <-1 >, and T5 is greater than or equal to 246.9 DEG C. Under the condition of room temperature, the ionic conductivity of the gel polymer electrolyte is 2.37-5mS cm <-1 >, the lithium ion transference number is greater than or equal to 0.75, and the electrochemical window is greater than or equal to 4.87 V (vs Li < + > / Li); in addition, when the temperature is less than or equal to-20 DEG C, the ionic conductivity is more than or equal to 0.162 mS cm <-1 >. The lignin-based flame-retardant bacterial cellulose gel polymer electrolyte not only has an excellent flame-retardant effect, but also has relatively good electrochemical performance.
Owner:NORTHEAST NORMAL UNIVERSITY
Flame-retardant recyclable compressible biodegradable cellulose aerogel as well as preparation method and application thereof
The invention discloses flame-retardant recyclable compressible biodegradable cellulose aerogel and a preparation method and application thereof.The preparation method comprises the following steps that 1, phosphorus / nitrogen-containing bridged organosiloxane and tetraethyl orthosilicate are added into bacterial cellulose dispersion liquid and stirred to be uniform, and a milk white dispersion solution is prepared; (2) heating, curing, pre-freezing and freeze-drying the milky white dispersion solution to obtain the flame-retardant recyclable compressible biodegradable cellulose aerogel, and the phosphorus / nitrogen-containing bridged organosiloxane is prepared by carrying out a reaction on phosphonitrilic chloride trimer and 3-aminopropyltriethoxysilane. The prepared cellulose aerogel is excellent in flame retardance, heat insulation and cyclic compression performance, and has a feasible application prospect in the aspect of radiation refrigeration.
Owner:JIANGNAN UNIV
Composite film based on photo-biological synergistic gradient degradation and preparation method thereof
PendingCN120606580AAgricultural articlesLamination ancillary operationsPlastic mulchLight responsive
The invention discloses a composite film based on light-biological synergistic gradient degradation and a preparation method thereof, the composite film sequentially comprises a light response layer, a transition layer and a biological response layer from outside to inside, and the light response layer comprises a polycaprolactone matrix, a tetraphenylporphyrin iron photosensitizer and anatase type TiO2 nanorods; the transition layer is a gradient blend of polylactic acid and modified starch; the biological response layer comprises polyhydroxyalkanoate and bacterial cellulose nanofibers; through the design of the three-layer gradient structure and the construction of the bionic microchannel, the synergistic effect of light degradation, hydrolysis and biodegradation is realized; the composite membrane has excellent mechanical properties and environmental adaptability, the degradation period can be accurately regulated and controlled within 30-180 days, and the soil degradation rate within 60 days reaches 91% or above; the preparation method comprises the processes of electrostatic spinning, gradient co-extrusion and bacterial cellulose in-situ culture. The material can be widely applied to the fields of agricultural mulching films, food packaging and the like, and the problems that a traditional degradable film is poor in mechanical property and uncontrollable in degradation are solved.
Owner:SUZHOU DUCHAMPS ADVANCED MATERIALS CO LTD
Preparation method of wide-temperature-range high-capacity cascade aqueous zinc-iodine battery and aqueous zinc-iodine battery
ActiveCN119340510Ahigh specific capacityImprove electrochemical performanceSecondary cells servicing/maintenanceElectrolyte immobilisation/gelificationElectrical batteryPerchlorate
The invention provides a preparation method of a wide-temperature-range high-capacity cascade aqueous zinc-iodine battery and the aqueous zinc-iodine battery, and belongs to the technical field of aqueous zinc ion batteries, the preparation method comprises the following steps: dissolving zinc perchlorate, bacterial cellulose, acrylamide, 1-vinyl-3-butylimidazolium bromide, a cross-linking agent and an initiator in water together to obtain a mixed solution; and carrying out polymerization reaction on the mixed solution at 60-80 DEG C to obtain the bromine-rich polycation hydrogel electrolyte, an iodine composite material is used as a positive electrode, metal zinc is used as a negative electrode, the bromine-rich polycation hydrogel electrolyte is used as an electrolyte, and the aqueous zinc-iodine battery is assembled. The aqueous zinc-iodine battery prepared by the method has extremely high specific capacity and excellent cycle performance in a wide temperature range from-50 DEG C to 50 DEG C.
Owner:ANHUI UNIV
Flame-retardant fire early-warning bacterial cellulose aerogel fiber and preparation method thereof
The invention discloses a preparation method of flame-retardant fire early-warning bacterial cellulose aerogel fibers, and belongs to the technical field of materials. According to the preparation method, bacterial cellulose is taken as a core raw material, then a phytic acid-polypyrrole conductive network is constructed in the fiber through a solvent replacement effect, and a ZnO-MXene sensing material with high flame sensitivity is further covered on the surface, so that the flame-retardant bacterial cellulose aerogel fiber with excellent flame retardance and high flame sensitivity is prepared. The preparation method is simple, convenient and efficient, resource recycling is effectively promoted, and the prepared flame-retardant fire early-warning bacterial cellulose aerogel fiber has wide application prospects in the fields of vehicle interiors, clothes and furniture.
Owner:JIANGNAN UNIV
Method for improving yield of bacterial cellulose by utilizing low-dose ultraviolet radiation
PendingCN119391693AIncrease productionhigh activityBacteriaMicroorganism based processesBiotechnologyPhosphomutase
The invention provides a method for increasing the yield of bacterial cellulose by utilizing low-dose ultraviolet radiation, and belongs to the field of microbial fermentation. The method comprises the following steps: inoculating a fermentation culture medium with a Taonella.mepensis seed solution, carrying out fermentation treatment, and carrying out ultraviolet radiation under set conditions in the fermentation process, so as to obtain a fermentation solution containing a bacterial cellulose membrane; and taking out the bacterial cellulose membrane in the fermentation liquor, and purifying the bacterial cellulose membrane to obtain the bacterial cellulose. On the basis of an HS culture medium formula, the ultraviolet irradiation time is regulated and controlled at the same time, so that the activity of cellulose synthesis related enzymes, such as the activity of UDP-glucose pyrophosphorylase and glucose phosphate mutase, is improved, the activity of glucose decomposition pathway related enzymes, such as pyruvate kinase and phosphofructokinase, is inhibited, and the activity of cellulose synthesis related enzymes is improved. The yield of the bacterial cellulose is further improved.
Owner:WUHAN TEXTILE UNIV
Bacterial cellulose-calcium alginate aerogel fiber and preparation method thereof
The invention discloses a bacterial cellulose-calcium alginate aerogel fiber and a preparation method thereof. The preparation method comprises the following steps: (1) preparing a spinning solution from bacterial cellulose and sodium alginate; and (2) extruding the spinning solution into a coagulating bath by adopting an injection pump to obtain hydrogel fibers, transferring the hydrogel fibers into a replacement liquid to replace moisture in the hydrogel fibers, and then freezing and drying to obtain the aerogel fibers. According to the preparation method, bacterial cellulose and sodium alginate are mixed to prepare a spinning solution, calcium ions are used for solidification forming, the bacterial cellulose can provide a continuous, intercontinuous and non-agglomerated spatial network under a certain concentration, and the spatial network guarantees a stable spatial structure and excellent torsion resistance of the aerogel fiber; and the sodium alginate solution is uniformly dispersed on the surface of the bacterial cellulose nanofiber, and is cured by calcium chloride, so that the structural stability of the aerogel fiber is further ensured, and the mechanical property and torsion resistance of the aerogel fiber are improved.
Owner:QINGDAO UNIV
Multi-element soil fertility improvement biological modifier and preparation method thereof
The invention discloses a multi-element soil fertility improvement biological modifier and a preparation method thereof, and belongs to the technical field of soil fertility improvement. The modifier is prepared from modified straw aerogel, a strontium titanate loaded lignin compound, lanthanide modified potassium feldspar powder, alginic acid oligosaccharide composite gamma-aminobutyric acid, carbon nitride quantum dots, bacterial cellulose nanofibers and polyaniline nanotubes according to the mass ratio of (18-22): (15-17): (13-15): (7-10): (10-13): (3-5): (7-10): (10-13): (5-8). The composite microbial inoculant is composed of a nano zero-valent iron-montmorillonite compound and a nitrogen fixation-phosphate solubilizing composite microbial inoculant. The modified straw aerogel and the bacterial cellulose nanofibers are interwoven to form a three-dimensional network framework, a habitat is provided for soil microorganisms, the water and fertilizer retention capacity of soil is enhanced, and meanwhile, the network structure promotes transmission of nutrients and water in the soil and improves the nutrient utilization efficiency.
Owner:SHENYANG INST OF APPL ECOLOGY CHINESE ACAD OF SCI
Degradable bio-based food packaging material and preparation method thereof
The invention relates to the technical field of polymer compositions, and particularly discloses a degradable bio-based food packaging material and a preparation method thereof.The degradable bio-based food packaging material is prepared from polylactic acid, ITA esterified bacterial cellulose, CSL-ITA esterified bacterial cellulose, polycaprolactone glycol, acetyl tributyl citrate, a photoinitiator and tocopherol; the preparation method comprises the following steps: esterifying bacterial cellulose hydrogel with itaconic anhydride, grafting with sodium copper chlorophyllin, dehydrating with gradient ethanol, and drying with supercritical CO2 to obtain modified powder; according to the preparation method, the interfacial compatibility of the bacterial cellulose and the polylactic acid is enhanced through ITA esterification, the illumination antibacterial function is given by utilizing CSL grafting, the polycaprolactone glycol and the acetyl tributyl citrate are synergistically used for toughening and improving the brittleness, the photoinitiator is added, the photoinitiator is added for mixing, and ultraviolet crosslinking curing is performed after film forming. The tocopherol protects the stability of the antibacterial structure of the CSL, the water resistance is improved through photo-crosslinking, and the material is degradable and meets the food packaging requirement.
Owner:ANSHUN UNIV
Preparation of isotropic flame-retardant bacterial cellulose aerogel and application of isotropic flame-retardant bacterial cellulose aerogel in fire early warning
The invention discloses preparation of isotropic flame-retardant bacterial cellulose aerogel and fire early warning application of the isotropic flame-retardant bacterial cellulose aerogel, and belongs to the technical field of aerogel materials. The preparation method of the aerogel comprises the following steps: (1) adding phosphorus / nitrogen-containing bridged organosiloxane and tetraethyl orthosilicate into bacterial cellulose dispersion liquid in proportion, and then stirring to obtain milk white uniform and stable turbid liquid; and (2) heating and curing the milky white turbid liquid, then precooling, and finally freeze-drying to obtain the isotropic flame-retardant bacterial cellulose aerogel. The aerogel disclosed by the invention is a cellulose-based aerogel material with flame-retardant and heat-insulating properties, has a remarkable isotropic flame-retardant characteristic, can effectively resist flame spread in all directions, is high in carbonization efficiency, can realize early detection and early warning of a fire disaster, and has a great application prospect in the field of fire disaster early warning.
Owner:JIANGNAN UNIV
Cellulose / chitosan / lanthanum oxide composite material for efficiently removing nitrogen and phosphorus in water body
PendingCN120094558AOther chemical processesWater contaminantsEnvironmental engineeringLanthanum nitrate
The invention discloses a cellulose / chitosan / lanthanum oxide composite material for efficiently removing nitrogen and phosphorus from a water body. The composite material is mainly prepared from the following raw materials: bacterial cellulose, chitosan, lanthanum nitrate hexahydrate and sodium hydroxide. By regulating and controlling the dosage of raw materials such as chitosan, lanthanum nitrate hexahydrate, sodium hydroxide and the like in the synthesis process of the material, the process parameters of material preparation are optimized, so that the optimal nitrogen and phosphorus removal performance is achieved. The practical application capability of the material is verified by evaluating the nitrogen and phosphorus removal performance, the application stability and the environmental factor influence of the material. The development of the material solves the problems that an environmental functional material is high in preparation cost, low in adsorption capacity, poor in selectivity and incapable of removing nitrogen and phosphorus at the same time. Theoretical support is provided for preparation of the nitrogen and phosphorus removal adsorption composite material for the water body, and meanwhile, the composite material has a wide practical application prospect.
Owner:WUXI UNIV
Genetically engineered bacterium for producing bacterial cellulose as well as construction method and application of genetically engineered bacterium
The invention provides a genetically engineered bacterium for producing bacterial cellulose as well as a construction method and application of the genetically engineered bacterium, and belongs to the technical field of bioengineering. According to the invention, a K.medellensis expression vector is constructed, a glycerol transporter expression vector and a glycerol kinase expression vector are further constructed based on the K.medellensis expression vector, and the K.medellensis glycerol transporter expression vector and the glycerol kinase expression vector are transformed into K.medellensis to construct a genetically engineered bacterium for producing bacterial cellulose; glycerin and corn steep liquor are directly used as a carbon source and a nitrogen source respectively, and the fermentation conditions of the genetically engineered bacteria are further optimized, so that environment-friendly and low-cost synthesis of the bacterial cellulose is realized, the yield of the bacterial cellulose is remarkably increased, and the method has good practicability.
Owner:GUANGZHOU UNIVERSITY
Antibacterial bacterial cellulose as well as anaerobic fermentation preparation method and application thereof
The invention provides antibacterial bacterial cellulose as well as an anaerobic fermentation preparation method and application thereof, and belongs to the technical field of antibacterial materials and biological materials. Tea polyphenol and a glucose solution are extracted from waste tea residues to prepare a fermentation culture medium, bacterial cellulose is produced by bacterial cellulose producing bacteria under the anaerobic condition, the tea polyphenol does not have antibacterial activity under the anaerobic condition, fermentation production of in-situ modified bacterial cellulose is achieved under the anaerobic condition, and the bacterial cellulose production efficiency is improved. The tea polyphenol-containing bacterial cellulose membrane with strong antibacterial activity, good blood compatibility and slow release effect is obtained, the problem that an oxygen dependent antibacterial activity modifier cannot be used for preparing antibacterial bacterial cellulose for a long time is solved, and a new choice is provided for food packaging, medical dressings, cosmetic materials and the like.
Owner:NANKAI UNIV +1
Sugar response hydrogel wound dressing based on Prussian blue nano-enzyme and bacterial cellulose as well as preparation method and application of sugar response hydrogel wound dressing
The invention discloses a sugar response hydrogel wound dressing based on Prussian blue nano-enzyme and bacterial cellulose as well as a preparation method and application of the sugar response hydrogel wound dressing, and belongs to the field of medical dressings and biological materials. The sugar-responsive hydrogel wound dressing is good in mechanical property, and can be subjected to cascade reaction to play antibacterial and anti-inflammatory roles. The preparation method comprises the following steps: preparing Prussian blue nano-enzyme (PBNPs) by adopting a one-pot method and utilizing a self-polymerization reaction, and preparing a Prussian blue nano-enzyme bacterial cellulose compound by utilizing an isotonic adsorption method; glucose oxidase (GOx) is loaded on BC coated PBNPs by adopting an in-situ polymerization method, the sugar response hydrogel wound dressing based on PBNPs and BC is obtained, the preparation method is simple in process, and the obtained sugar response hydrogel wound dressing is good in stability, suitable for factory production and hopeful to be applied to diabetes wound treatment. Meanwhile, the PBNPs are applied to the field of diabetic wound dressings, and the application direction of the PBNPs is widened.
Owner:SHAANXI UNIV OF SCI & TECH
Composite material and preparation method thereof, negative electrode current collector, metal battery and electric device
ActiveCN119601669AImprove electrochemical performanceUniform depositionElectrode carriers/collectorsNegative electrodesElectrical batteryBattery cell
The invention relates to the technical field of secondary batteries, in particular to a composite material and a preparation method thereof, a negative electrode current collector, a metal battery and an electric device. The composite material provided by the invention comprises an MXene material, and the MXene material comprises a surface functional group; the silver nanoparticles are grown on the surface of the sheet layer of the MXene material in situ; the modified bacterial cellulose comprises bacterial cellulose and oxygen-containing functional groups modified on the surface of the bacterial cellulose; the modified bacterial cellulose is loaded on the surface of the MXene material; wherein the loading mode of the modified bacterial cellulose at least comprises intermolecular interaction between an oxygen-containing functional group of the modified bacterial cellulose and a surface functional group of the MXene material. The composite material provided by the invention has excellent lithium-loving performance, and can delay the formation of lithium dendrites, so that the electrochemical performance of the metal battery can be improved.
Owner:NATIONAL INSTITUTE OF GUANGDONG ADVANCED ENERGY STORAGE CO LTD
Nicotine slow-release aerogel based on bacterial cellulose as well as preparation method and application of nicotine slow-release aerogel
The invention belongs to the technical field of tobacco products, and particularly relates to nicotine slow-release aerogel based on bacterial cellulose as well as a preparation method and application of the nicotine slow-release aerogel. The nicotine slow-release aerogel comprises a graft-modified / ion-crosslinked bacterial cellulose network and a tobacco extract dispersed in the graft-modified / ion-crosslinked bacterial cellulose network, wherein the graft modified / ionic cross-linked bacterial cellulose network is used as an aerogel skeleton; the tobacco extract contains a target component nicotine which can be dissolved out and released from the target component nicotine after the aerogel swells in a saliva-like environment. Compared with a traditional buccal nicotine sustained-release product, the nicotine sustained-release aerogel is large in specific surface area, nicotine is derived from natural tobacco plants, and use of chemically synthesized nicotine is avoided. In addition, the nicotine slow-release aerogel is high in strength, good in biocompatibility, non-toxic, harmless, degradable and environment-friendly, and has important application value in the fields of buccal cigarettes, smokeless tobacco products, drug release and the like.
Owner:CHINA TOBACCO HENAN IND CO LTD
P-MXene conductive ink and BC reinforced polymer composite film as well as preparation method and application thereof
ActiveCN119613818AHigh mechanical strengthGuaranteed mechanical strengthMagnetic/electric field screeningForce measurementPolymer scienceComposite film
The invention relates to the technical field of intelligent materials, and discloses a p-MXene conductive ink and BC reinforced polymer composite film and a preparation method and application thereof.The composite film comprises MXene and bacterial cellulose, the surface of the MXene is coated with waterborne polydopamine, waterborne polyurethane is embedded in the bacterial cellulose, and the surface of the MXene is coated with waterborne polyurethane; hydroxyl groups in the water-based polydopamine and amino groups in the water-based polyurethane form hydrogen bonds to connect the MXene with the bacterial cellulose. The composite film obtained by the invention has excellent mechanical properties and electrical properties, and also has comprehensive properties such as electromagnetic shielding and stress-strain sensing.
Owner:JIANGSU TEXTILE PROD QUALITY SUPERVISION & INSPECTION INST +1
Carbon nanofiber aerogel and preparation method thereof
ActiveCN119430152AIncrease crosslink densityImprove structural stabilityNanotechnologyAerogel preparationPolymer scienceFreeze-drying
The invention relates to the technical field of nano materials, in particular to carbon nanofiber aerogel and a preparation method thereof.The preparation method of the carbon nanofiber aerogel comprises the steps that bacterial cellulose dispersion liquid containing inorganic ammonium salt and a polymer solution are mixed to obtain mixed dispersion liquid, the mixed dispersion liquid is subjected to freezing treatment, and after freeze drying, the carbon nanofiber aerogel is obtained; the bacterial cellulose aerogel is obtained; and carrying out pyrolysis treatment on the bacterial cellulose aerogel to obtain the carbon nanofiber aerogel. The polymer is introduced in the preparation process, extra carbon can be generated in the carbonization process, connection between carbon nanofibers is tighter, the overall structural strength of the material is enhanced, through a composite carbon network formed after the polymer is carbonized, the carbon content of the aerogel is increased, and through the crosslinking and filling effects, the thermal conductivity of the aerogel is improved. The mechanical property of the aerogel is improved. A high-strength carbon network can better disperse stress, and collapse or excessive deformation of the structure is avoided when the aerogel bears external force, so that the maximum compression strength of the aerogel is remarkably improved.
Owner:SOUTHERN UNIVERSITY OF SCIENCE AND TECHNOLOGY
Preparation method and application of biomass-based iron-nitrogen-doped carbon catalyst with full pH range
PendingCN119601674ALarge specific surface areaHigh catalytic activityFuel and primary cellsCell electrodesPtru catalystCarbonization
The invention belongs to the technical field of new energy materials, and particularly relates to a preparation method of a biomass-based iron-nitrogen-doped carbon catalyst with a full pH range and application of the biomass-based iron-nitrogen-doped carbon catalyst in the field of zinc-air batteries. According to the preparation method, bacterial cellulose, zinc nitrate, ferric chloride and dimethylimidazole are taken as precursors, a clean, efficient and stable soft template method is selected, and Zn < 2 + > gasification and evaporation etching in a pyrolysis process are utilized, so that the derived carbon catalyst generates a large number of defects and a large number of micropores and mesopores, and overgrowth of iron nanoparticles is limited; and the oxygen reduction catalyst with high specific surface area and high catalytic activity and stability in a whole pH range is prepared through drying and high-temperature carbonization process optimization, so that an electrode active material with excellent electrochemical performance is provided.
Owner:CIVIL AVIATION UNIV OF CHINA
Liquid detergent
ActiveCN116096848BInorganic/elemental detergent compounding agentsOrganic detergent compounding agentsHydroxy groupBacterial cellulose
A liquid detergent containing: component (A): an inorganic base agent; and component (B): one or more structuring agents selected from the group consisting of bacterial cellulose, non-bacterial cellulose, and a compound represented by the following general formula (1), wherein at least a part of the component (A) exists in a solid state in the liquid detergent, and the water content is less than 30% by mass based on the total mass of the liquid detergent. [Chemical 1] (In formula (1), Z 1 ~Z 3 are each independently a hydrogen atom, a hydroxyl group, or a carboxyl group, a + b = 7 to 19, c + d = 7 to 19, and e + f = 7 to 19).
Owner:LION CORP
Nanorod-shaped Ni / Ni3S2 / VN electro-catalytic material as well as preparation method and application of nanorod-shaped Ni / Ni3S2 / VN electro-catalytic material
The invention discloses a nanorod-shaped Ni / Ni3S2 / VN electro-catalytic material and a preparation method and application thereof.The preparation method comprises the steps that firstly, a nickel source is loaded on the surface of bacterial cellulose, and a Ni / Ni3S2 / VN electro-catalytic hydrogen evolution material with the nanorod-shaped morphology is prepared through a solid-phase sintering method; the bacterial cellulose is a pure natural biomass element, has no pollution to the environment, is green and environment-friendly, has a large number of carboxyl functional groups on the surface, can effectively complex free nickel ions in a solution as a template agent, and keeps good catalytic stability after being carbonized into carbon nanofibers, and Ni3S2 and VN are compounded, so that the catalytic performance of the carbon nanofibers is improved. According to the preparation method, a nanorod-shaped heterostructure is formed, part of Ni metal is reduced, all the components have a synergistic effect, the excellent electro-catalytic hydrogen evolution performance is shown in an alkaline environment, the preparation process is green, simple and convenient, and reaction conditions are easy to control.
Owner:SHAANXI UNIV OF SCI & TECH
Carbon nanotube-based aerogel with photo-thermal electric heating effect, preparation method and application
PendingCN120790043AWater cleaningFatty/oily/floating substances removal devicesFreeze-dryingHeating effect
The preparation method comprises the following steps: firstly, dispersing hydroxylated carbon nanotubes in water, carrying out ultrasonic treatment to form a uniform dispersion liquid, and then uniformly mixing the uniform dispersion liquid with a bacterial cellulose dispersion liquid, so as to obtain the carbon nanotube-based aerogel with the photo-thermal electric heating effect. Adding methyltrimethoxysilane sol which is hydrolyzed in advance, stirring to form a precursor system, and then performing directional freezing, freeze drying and heat treatment to obtain the carbon nanotube-based aerogel with the photo-thermoelectric heating effect. The carbon nanotube-based aerogel has the super-hydrophobic characteristic, the surface water contact angle is 161 DEG C, the surface temperature is rapidly increased to 126.7 DEG C under applied voltage, photo-thermal response is rapidly generated under simulated sunlight irradiation, the surface temperature is rapidly increased to 117.7 DEG C, and the carbon nanotube-based aerogel is suitable for rapid adsorption and separation of high-viscosity crude oil, has excellent chemical stability and mechanical stability, and can be used in the field of adsorption and separation of high-viscosity crude oil. And after the surface is broken, excellent super-hydrophobic performance and efficient photo-thermal-electric-thermal response capability are still kept.
Owner:DONGGUAN UNIV OF TECH