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569 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
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
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
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
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
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
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
Construction method of gas-steam-solid interface seawater desalination / sewage purification and in-situ hydrogen production reaction system
The invention belongs to the technical field of hydrogen production by photothermal catalytic decomposition of seawater / sewage, and particularly relates to a construction method of a gas-gas-solid interface seawater desalination / sewage purification and in-situ hydrogen production reaction system. The reaction system consists of a bifunctional photo-thermal catalysis / evaporation material and a reaction device, solar energy is taken as an energy source, and seawater / sewage is taken as a reactant to carry out gas-steam-solid interface seawater desalination / sewage purification and photo-thermal decomposition of water to produce hydrogen. The bacterial cellulose hydrogel is used as a supporting substrate of a water supply substrate and a photo-thermal evaporation material, and the photo-thermal catalytic material is limited on an air-water interface, so that the stability of the photo-thermal catalyst is improved, and the defects of underwater light attenuation, large hydrogen mass transfer resistance and the like of a traditional liquid phase reaction system are overcome. Seawater desalination / sewage purification is synchronously realized, hydrogen is produced through in-situ decomposition of desalted water vapor, and the synchronous improvement of the seawater desalination / sewage purification rate and the in-situ water decomposition hydrogen production rate is promoted through the design of a gas-steam-solid interface reaction system.
Owner:SUN YAT SEN UNIV
Gelatin bacterial cellulose composite material with lotus leaf structure as well as preparation method and application of gelatin bacterial cellulose composite material
The invention discloses a gelatin bacterial cellulose composite material with a lotus leaf structure as well as a preparation method and application thereof, and belongs to the technical field of packaging and fresh keeping. The preparation method comprises the following steps: accurately copying a micro-nano structure on the surface of the lotus leaf by utilizing a polydimethylsiloxane template technology, mixing a gelatin solution, a bacterial cellulose solution, glycerol and a functional active substance curcumin to obtain a film forming solution, drying the film forming solution on a template to form a film, and then removing the template. The surface of the material naturally presents a lotus leaf bionic structure, and the material is endowed with excellent hydrophobic performance without additional chemical modification or hydrophobic coating. The method is simple and convenient in process, healthy and harmless, and the prepared functional composite film integrates hydrophobicity, antibacterial property, oxidation resistance, ultraviolet shielding property and good mechanical property, is suitable for the packaging and fresh-keeping fields of food, medicines, agricultural products and the like, can effectively prolong the shelf life, and meets the development requirements of green packaging.
Owner:SHAANXI UNIV OF SCI & TECH
Bionic tree-shaped evaporator based on hollow microtubes and application of bionic tree-shaped evaporator
The invention discloses a bionic tree-shaped evaporator based on hollow microtubes and application thereof, and relates to the technical field of solar water treatment.The bionic tree-shaped evaporator is prepared through the following steps that bacterial cellulose hybrid spinning solution serves as shell layer fluid, absolute ethyl alcohol serves as core layer fluid, the shell layer fluid and the core layer fluid are co-extruded into an ethyl alcohol coagulating bath, curing is conducted, washing is conducted with ethyl alcohol and deionized water in sequence to be neutral, and drying is conducted to obtain the bionic tree-shaped evaporator. A hollow hybrid microtube is obtained; and arranging and fixing the plurality of hollow hybrid microtubes on a bracket according to a tree-shaped branch structure to obtain the bionic tree-shaped evaporator. The bionic tree-shaped evaporator prepared by the invention has excellent mechanical flexibility, salt tolerance and purification efficiency, and provides a new material and a new scheme for efficient and sustainable solar seawater desalination and wastewater treatment.
Owner:DONGGUAN UNIV OF TECH
Preparation method of multi-network hydrogel applied to flexible zinc ion battery
Rapid development of wearable portable devices urgently requires high performance flexible supercapacitors and batteries. As a core component of a flexible energy storage device, hydrogel electrolyte has aroused wide attention. According to the invention, the PBAx composite hydrogel (x represents the PVA content, and the values are 0, 0.5, 1 and 1.5) is prepared through chain crosslinking of sodium polyacrylate (PANa), polyvinyl alcohol (PVA) and bacterial cellulose (BC). The PVA component can effectively regulate and control intramolecular crosslinking among PANa molecular chains through hydrogen-bond interaction, so that the optimized PBA0.5 hydrogel forms a porous structure, the structure shows remarkably enhanced water holding capacity and mechanical strength, and the ultimate compressive strength reaches 258.4 kPa. By utilizing the ionic conductivity characteristic of 4.607 S m <-1 > of the material, the specific capacity of a basic zinc battery assembled by the material reaches 171.3 mAh g <-1 >, and the material shows excellent rate capability. The hydrogel electrolyte can effectively protect the zinc negative electrode and guarantee the cycling stability of the battery. In addition, due to the excellent anti-freezing performance of the PBA0.5 hydrogel, the specific capacity of the battery in a low-temperature environment of-40 DEG C can still be kept at 83.1 mAh g <-1 >.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA)
Material for paper tableware and preparation method thereof
PendingCN121006722AWater-repelling agents additionPretreatment with acid reacting compoundsFiberSugar
The invention relates to the technical field of disposable tableware, and discloses a material for paper tableware and a preparation method thereof.The preparation method comprises the steps that sugarcane fibers and bamboo fibers are pretreated to obtain a fiber mixture, and a treatment solution is collected to serve as a byproduct sugar solution; carrying out enzymolysis treatment on the fiber mixture to realize microfibrillation and release ferulic acid to obtain microfibrillated fiber pulp; fermenting and dispersing by using a byproduct sugar solution to prepare bacterial cellulose nano pulp; mixing the microfibrillated fiber pulp with bacterial cellulose nano-pulp, and carrying out enzymatic crosslinking to obtain crosslinked fiber pulp; and adding a modified sizing agent into the cross-linked fiber pulp, blending into pulp, and carrying out molding, curing, hot pressing and drying treatment to obtain the material for the paper tableware. The mechanical strength, the water resistance, the oil resistance and the thermal stability of the paper tableware material are remarkably improved, and the waste liquid load is effectively reduced.
Owner:WENZHOU SANXING ECO-FRIENDLY PACKAGING CO LTD
Preparation method of composite degradable TIEL aerogel
The invention provides a preparation method of composite degradable TIEL aerogel, and relates to the technical field of production of TIEL aerogel. The preparation method of the composite degradable TIEL aerogel comprises the following steps: S1, firstly, preparing a culture medium, and dissolving 20g / L of glucose, 5g / L of yeast extract, 5g / L of peptone, 2.7 g / L of Na2.HPO4, 0.5 g / L of MgSO4. 7H2O and 1.5 g / L of citric acid in deionized water; s2, adjusting the pH value of the culture medium with HCl, then performing high-temperature sterilization treatment on the culture medium, cooling the culture medium to room temperature, inoculating pre-cultured acetobacter aceti into the culture medium, performing static culture for 7 days at 30 DEG C, then repeatedly cleaning the harvested film with deionized water, and removing impurities with an alkaline solution to obtain a fresh bacterial cellulose film. According to the cellulose aerogel, chitosan is introduced as a natural electron donor, so that the triboelectric property of the cellulose aerogel is optimized, and meanwhile, the degradability is kept.
Owner:NORTHEASTERN UNIV AT QINHUANGDAO
Preparation method of polyacrylamide for treatment
The invention relates to the technical field of preparation of high polymer materials and intelligent response materials, in particular to a preparation method of polyacrylamide for treatment. And constructing a quaternary polymerization system with acrylamide, a temperature-sensitive monomer and a zirconium-based metal organic framework-graphene quantum dot composite material. Magnetic response interpenetrating network gel is formed by induction of a photo-magnetic synergistic field, bacterial cellulose nanofibrils and a calcium silicate layered structure are introduced through a biomimetic mineralization technology, and the hierarchical porous carrier is prepared by combining a microfluidic crushing technology and a supercritical drying technology. Finally, through an intelligent regeneration mechanism of bimetal coordination activation and high-frequency magnetic field triggering, the material is endowed with multiple stimulation response characteristics, high adsorption capacity and in-situ regeneration capacity, and the mechanical strength and the salt resistance are remarkably improved through a pearl-layer-like micro-nano laminated structure. The method is suitable for industrial wastewater advanced treatment and emergency pollution repair scenes.
Owner:TIANJIN BENSHENG NEW MATERIAL TECH DEV CO LTD
Preparation method and application of bacterial cellulose / bismuth molybdate composite photocatalytic material
PendingCN119972176AWater/sewage treatment by irradiationOrganic-compounds/hydrides/coordination-complexes catalystsMolybdateFreeze-drying
The invention discloses a preparation method of a bacterial cellulose / bismuth molybdate composite photocatalytic material, which comprises the following steps: firstly, carrying out alkali washing on in-situ growth bacterial cellulose, and freeze-drying for later use; shearing a certain amount of bacterial cellulose to prepare a bacterial cellulose suspension, and adding bismuth molybdate powder; carrying out ultrasonic full mixing, and carrying out vacuum filtration and hot pressing; and finally, preparing the bacterial cellulose / bismuth molybdate composite photocatalytic material. According to the invention, an in-situ growth and vacuum filtration method is adopted, so that the method is low in cost, green and pollution-free, and does not need high-temperature reaction; meanwhile, the bacterial cellulose / bismuth molybdate composite photocatalytic material is good in stability, can be recycled and has excellent photocatalytic performance, the degradation rate of rhodamine B can reach 70% or above within 150 min, and the degradation rate of the bacterial cellulose / bismuth molybdate composite photocatalytic material can still reach 50% or above after 5 times of experiments are cyclically repeated.
Owner:ANHUI POLYTECHNIC UNIV
Preparation method of Al-UIO-66 bacterial cellulose beads and wastewater treatment method
ActiveCN120098332AWater contaminantsWater/sewage treatment by sorptionAluminium chlorideSewage treatment
The invention relates to a preparation method of Al-UIO-66 at bacterial cellulose beads and a wastewater treatment method, and belongs to the technical field of sewage treatment, and the specific scheme is as follows: the preparation method of the Al-UIO-66 at bacterial cellulose beads comprises the following steps: step 1, uniformly mixing and dispersing purified and fermented bacterial cellulose and deionized water to obtain a bacterial cellulose dispersion liquid I; 2, adding a chemical cross-linking agent into the bacterial cellulose dispersion liquid I, heating to obtain a preliminarily cross-linked bacterial cellulose dispersion liquid II, and dropwise adding the bacterial cellulose dispersion liquid II into the secondary cross-linking liquid for cross-linking reaction; wherein the secondary cross-linking liquid comprises aluminum chloride, zirconium chloride and absolute ethyl alcohol; and step 3, putting a product obtained after the cross-linking reaction into a ligand solution of UIO-66, and synthesizing the Al-UIO-66 at bacterial cellulose beads in situ through a water bath hot method. The prepared Al-UIO-66 (at) bacterial cellulose beads can be used as an adsorbent to realize efficient removal of TCH in wastewater.
Owner:HARBIN INST OF TECH
Antibacterial moisture-absorbing fiber fabric and preparation method thereof
PendingCN120905829AFilament/thread formingArtificial filaments from cellulose derivativesFiberPolymer science
The invention discloses an antibacterial moisture-absorbing fiber fabric and a preparation method thereof, and relates to the technical field of fiber fabrics, the antibacterial moisture-absorbing fiber fabric comprises bacterial cellulose-based antibacterial fibers and polyurethane-based fibers, and the bacterial cellulose-based antibacterial fibers and the polyurethane-based fibers are interwoven to form the fiber fabric. The shell spinning solution is prepared from gelatin, ethyl cellulose and O-quaternary ammonium salt chitosan, the shell spinning solution is prepared from PPC-based polyurethane, and the core-shell structure polyurethane-based fiber is prepared through biaxial spinning, so that the production of the antibacterial, durable and moisture-absorbing fabric is realized, the problem that the fabric is uncomfortable in a humid environment is solved, and the antibacterial, durable and moisture-absorbing fabric is prepared. The durability and the antibacterial property of the fabric are improved.
Owner:江苏合源纺织科技有限公司
Salt-tolerant hydrogel evaporator for generating power by solar evaporation and preparation method and application thereof
The invention belongs to the technical field of photo-thermal material engineering, and particularly relates to a salt-resistant hydrogel evaporator utilizing solar evaporation for power generation and a preparation method and application thereof. The salt-tolerant hydrogel evaporator is prepared from the following raw materials: polyvinyl alcohol, hydrophilic conductive nanoparticles, bacterial nanocellulose and carbon nanotubes. Polyvinyl alcohol (PVA) is used as a framework, bacterial cellulose (BC) jointly forms a hydrogel structure with a hierarchical nanostructure, modified polyaniline conductive nanoparticles (CPs) are used for enhancing the electric signal transmission capacity of the hydrogel evaporator, and the salt-resistant hydrogel solar evaporator capable of realizing seawater desalination and electric power generation is prepared by adopting a simple and convenient method.
Owner:QILU UNIVERSITY OF TECHNOLOGY (SHANDONG ACADEMY OF SCIENCES)
Preparation method of modified charcoal-based material and application of modified charcoal-based material in saline-alkali soil improvement
The invention belongs to the technical field of biochar-based material preparation, and discloses a preparation method of a modified biochar-based material and application of the modified biochar-based material in saline-alkali soil improvement, and the preparation method of the modified biochar-based material comprises the following specific steps: preparing phosphoric acid modified bacterial cellulose: adding the bacterial cellulose into a phosphate solution; soaking, freezing and thawing, soaking in a soluble calcium salt solution, and fully reacting to obtain phosphoric acid modified bacterial cellulose; preparing a biochar-based material: performing pyrolysis treatment on the phosphoric acid modified bacterial cellulose to obtain the biochar-based material; s3, acid modification of the biochar fiber material: adding the biochar-based material into an acid solution, fully stirring, and washing to be neutral to obtain the acid modified biochar fiber material. The saline-alkali soil conditioner can effectively reduce the pH of saline-alkali soil, remove PFOA, improve the physical structure and permeability of the soil and improve the quality of the soil.
Owner:南京万瑞环境科技有限公司
Negative pole piece, preparation method thereof and lithium ion battery
The invention provides a negative pole piece, a preparation method thereof and a lithium ion battery. The negative pole piece comprises a negative current collector and a negative active substance layer arranged on at least one side of the negative current collector, the negative active substance layer comprises a negative active material and an additive, the negative active material comprises a silicon-based active substance, and the additive comprises bacterial cellulose. The bacterial cellulose is added into the negative electrode active material layer, so that the volume expansion phenomenon among silicon-based active material particles is effectively relieved, the structural strength of the negative electrode plate is improved, the expansion rate of the negative electrode plate is reduced, and meanwhile, the cycle performance of the lithium ion battery is improved.
Owner:SUZHOU QINGTAO NEW ENERGY TECH CO LTD