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251 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.
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
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 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
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)
Rhamnolipid foam oil displacement system for medium-low permeability oil reservoir as well as screening method and application of rhamnolipid foam oil displacement system
The invention provides a medium-low permeability oil reservoir rhamnolipid foam oil displacement system and a screening method and application, and relates to the technical field of microbial oil recovery, the medium-low permeability oil reservoir rhamnolipid foam oil displacement system comprises the following steps: S1, screening an applied oil reservoir; s2, determining a rhamnolipid foam flooding system based on the oil reservoir mineralization degree; s3, based on the porosity of the oil reservoir, the injection mode of a rhamnolipid foam oil displacement system is determined, the rhamnolipid foam oil displacement system comprises a foaming agent, a foam stabilizer, nitrogen and water, the foaming agent comprises one or more of dirhamnose difat, dirhamnose monofat, single rhamnose monofat and single rhamnose difat fermentation liquor, and the foam stabilizer comprises one or more of dirhamnose difat, dirhamnose monofat, single rhamnose monofat and single rhamnose difat fermentation liquor. The foam stabilizer is prepared from one or more of xanthan gum, welan gum, Wollan gum, Dide gum, gellan gum, rhamnose gum, diidine gum, plant cellulose and bacterial cellulose. The method has the beneficial effects that the oil reservoir application range is wide, the pertinence is high, the field test effect is good, efficient generation and long-acting migration of foam in the oil reservoir are guaranteed, green and high-quality development of old oil fields is promoted, and achievement of the national dual-carbon strategy is assisted.
Owner:CHINA PETROLEUM & CHEMICAL CORP +2
Electromagnetic shielding composite material with active and passive infrared stealth function and preparation method thereof
The invention relates to the technical field of electromagnetic shielding materials, and particularly discloses an electromagnetic shielding composite material with active and passive infrared stealth functions and a preparation method thereof. The composite material comprises an electromagnetic wave reflecting layer and a plurality of electromagnetic wave absorbing layers. The electromagnetic wave reflecting layer is made of silver-plated bacterial cellulose, and efficient reflection of electromagnetic waves is achieved through high conductivity of the silver-plated bacterial cellulose. The electromagnetic wave absorbing layer is formed by compounding bacterial cellulose, multi-walled carbon nanotubes and core-shell magnetic nanoparticles, and the content of the multi-walled carbon nanotubes is gradually decreased and the content of the core-shell magnetic nanoparticles is gradually increased from the position close to the electromagnetic wave reflecting layer to the outside, so that a gradient structure is formed; the gradient design can improve surface impedance matching, promote electromagnetic waves to enter the material, and enhance electromagnetic loss through an interlayer multiple reflection-absorption process. The material disclosed by the invention has the functions of efficient electromagnetic shielding and active and passive infrared stealth.
Owner:ANHUI UNIV +1
Bacterial cellulose / silver nanowire / MXene composite conductive film and preparation method thereof
PendingCN121662487AMaterial nanotechnologyConductive layers on insulating-supportsComposite filmThin membrane
The invention discloses a bacterial cellulose / silver nanowire / MXene composite conductive film and a preparation method thereof, and relates to the technical field of flexible conductive materials. The composite film comprises a bacterial cellulose substrate, an MXene conductive layer and a silver nanowire conductive network layer. The preparation method comprises the following steps: S1, preparing bacterial cellulose dispersion liquid; s2, preparation of an MXene dispersion liquid; s3, preparing a silver nanowire dispersion liquid; and S4, preparing the composite film. The composite film with a Janus structure is prepared through a vacuum-assisted layer-by-layer filtering process, and the composite film has high mechanical performance, low square resistance, excellent electromagnetic interference shielding effectiveness, rapid Joule heating performance and excellent environmental stability and mechanical durability. The problem that an existing flexible electromagnetic shielding material is difficult to consider ultrathin performance, high flexibility, strong mechanical performance and multifunctional integration is solved, and the flexible electromagnetic shielding material has wide application prospects in the fields of electromagnetic shielding, flexible electronic devices, wearable heaters and the like.
Owner:天津柔电科技有限公司
Preparation method of aqueous zinc ion battery diaphragm material modified by Ti0. 87O2 nanosheet and bacterial cellulose
The invention designs a sandwich structure composite system diaphragm with ion selectivity and multi-size screening to realize high-density and dendrite-free zinc deposition on the surface of a zinc negative electrode and spontaneously inhibit passivation / corrosion of the zinc negative electrode in the circulation process. According to the sandwich structure composite system, a traditional glass fiber diaphragm is used as a substrate, then bacterial cellulose is used as a middle layer, and finally a metal oxide Ti0. 87O2 nanosheet is used as a top layer, so that a macroscopic / microcosmic / molecular pore multi-size screening structure is formed, uniform deposition of zinc can be realized, growth of dendritic crystals can be inhibited, and the long cycle performance of the battery is effectively improved.
Owner:HUBEI UNIV
Preparation of CS / BC / MBene composite aerogel material and application of CS / BC / MBene composite aerogel material in photo-thermal water evaporation
The invention discloses preparation of a CS / BC / MBene composite aerogel material and application of the CS / BC / MBene composite aerogel material in photo-thermal water evaporation. A MoAlB precursor is etched through a fluoride-free hydrothermal method to prepare MoBTxMBene nanosheets, then the MoBTxMBene nanosheets, chitosan (CS) and bacterial cellulose (BC) are assembled through interaction of hydrogen bonds and the like, and the CS / BC / MBene composite aerogel with vertical pore channels is obtained through directional freeze drying. The aerogel has excellent photothermal conversion performance, mechanical strength and hydrophilicity, the maximum surface temperature of the composite aerogel under irradiation of one sunlight reaches 112.3 DEG C, the water evaporation rate of 5.06 kg.m <-2 >. H <-1 > and the photothermal conversion efficiency of 99.76% can be achieved, the composite aerogel is suitable for seawater desalination and sewage purification, the preparation method is environmentally friendly and simple, and the preparation method is suitable for industrial production. And the method has a wide industrial application prospect.
Owner:FUZHOU UNIV
PEO-based solid electrolyte capable of adsorbing polysulfide and preparation method of PEO-based solid electrolyte
The invention discloses a PEO-based solid electrolyte capable of adsorbing polysulfide and a preparation method of the PEO-based solid electrolyte, and relates to the technical field of sulfur lithium batteries, the preparation method comprises the following steps: 1) preparing PEO solid electrolyte slurry; and 2) preparing the solid electrolyte film. The H-Beta molecular sieve added into the electrolyte can effectively destroy a PEO crystalline region, adsorb polysulfide and improve the ionic conductivity; the bacterial cellulose skeleton provides mechanical strength and inhibits growth of lithium dendrites. The ionic conductivity of the electrolyte reaches 2.37 * 10 <-4 > Scm <-1 > at the temperature of 60 DEG C, when the electrolyte is applied to a lithium-sulfur battery, the specific capacity of about 350 mAhg <-1 > can still be kept after 400 cycles at the rate of 1C, excellent cycle stability is shown, and the shuttle effect of polysulfide is effectively inhibited.
Owner:GUANGDONG UNIV OF TECH
Composite flora for producing bacterial cellulose and preparation method thereof
The invention relates to the technical field of bacterial cellulose preparation, in particular to a composite flora for producing bacterial cellulose and a preparation method thereof, and the preparation method comprises the following steps: screening gluconobacter oxydans, obtaining culture medium preparation materials and preparation tools, preparing a slant culture medium set, preparing an enriched liquid culture medium set, and preparing composite flora mixed inoculation liquid. The method comprises the following steps: preparing a waste tobacco leaf leaching solution, extracting a proportional leaching solution from the waste tobacco leaf leaching solution according to a preset proportion, obtaining a mixed fermentation culture medium based on a preparation tool and the proportional leaching solution, and carrying out inoculation operation on a composite flora mixed inoculation solution by using the mixed fermentation culture medium to obtain a dry cellulose membrane; calculating the yield of the bacterial cellulose based on the dry cellulose membrane, and completing the preparation of the composite flora for producing the bacterial cellulose based on the yield of the bacterial cellulose. The method can be used for scientifically, efficiently and stably preparing the composite flora.
Owner:HAINAN BAIKERUI BIOTECHNOLOGY CO LTD
Medical bacterial cellulose dressing with high water retention capacity and preparation method and application thereof
The application provides a medical bacterial cellulose dressing with high water retention capacity and a preparation method and application thereof, and belongs to the technical field of medical supplies. The medical bacterial cellulose dressing with high water retention capacity is prepared by reacting a bacterial cellulose membrane with a sodium hyaluronate solution in the presence of tetramethylphosphonium chloride, and the water retention time of the dressing is not less than 2000 min. The prepared medical bacterial cellulose dressing with high water retention capacity has great advantages in actual medical application. For burn and scald patients, traditional dressings are often difficult to keep the wound moist for a long time, and if they are removed after drying, secondary wound damage will be caused. However, the dressing can provide a persistent and stable moist environment for the wound and accelerate the repair and regeneration of damaged skin cells due to its excellent water retention capacity.
Owner:HUNAN DEPUS MEDICAL TECH CO LTD
Use of bacterial cellulose for treating or preventing airway diseases
Owner:YI CHANG NANO NEW MATERIAL TECHNOLOGY (GUANGDONG) CO LTD
Stable bacterial cellulose suspension
The present invention relates to a stable bacterial cellulose suspension, a BC powder with good redispersibility, a composition comprising the same, and a method of preparation and use thereof.
Owner:CELLULGENE LLC
Preparation method of fibrous protein / bacterial cellulose efficient hemostatic patch
The invention discloses a preparation method of a fibrous protein / bacterial cellulose efficient hemostatic patch. The preparation method comprises the following steps: (1) in-situ preparation of large-aperture bacterial cellulose; (2) infiltration of fibrinogen in the large-aperture bacterial cellulose; and (3) enzyme digestion and freeze-drying treatment of fibrinogen. The problems that fibrinogen is fast in degradation and poor in stability and mechanical property are solved, the prepared fibrous protein / bacterial cellulose efficient hemostatic patch can prevent secondary bleeding and avoid thrombus to a certain extent, the preparation process is simple and easy to implement, and large-scale preparation and storage can be achieved.
Owner:SHANGHAI NAT ENG RES CENT FORNANOTECH
Conductive hydrogel suture line as well as preparation method and application thereof
The invention relates to the technical field of biomedical engineering and intelligent medical instruments, in particular to a conductive hydrogel suture line and a preparation method and application thereof. The preparation method comprises the following steps: adding bacterial cellulose and 3, 4-ethylenedioxythiophene, and carrying out an in-situ polymerization reaction to obtain a BC / PEDOT composite solution; and preparing continuous fibers by using a micro-fluidic wet spinning process, and further weaving the continuous fibers into a multi-strand structure to obtain the suture line. According to the suture line, high mechanical strength is achieved through micro-fluidic wet spinning and a K3 woven structure, the charge transfer behavior of a poly (3, 4-ethylenedioxythiophene) chain is regulated and controlled through bound water, and dual response to wound tension and exudate is achieved. The near-infrared photothermal antibacterial property and an intelligent classification system based on deep learning are combined, the wound state can be monitored and classified in real time, and the method is suitable for intelligent postoperative wound management.
Owner:DONGGUAN UNIV OF TECH
A sodium supplement having high electrical conductivity and a method of making the same
ActiveCN117682948BOrganic compound preparationCell electrodesOXALIC ACID DIHYDRATESodium supplements
The application provides a preparation method of a sodium supplement agent with high conductivity, comprising the following steps: S1) soaking bacterial cellulose in a sodium carbonate solution, and then freeze-drying to obtain product A; S2) calcining the product A in a protective atmosphere to obtain product B; and S3) mixing an aqueous oxalic acid solution with the product B, and then standing to obtain the sodium supplement agent. Compared with the prior art, the sodium supplement agent prepared by the method can supplement the consumption of sodium ions in the positive electrode material in the circulation process, and the sodium supplement agent has excellent controllability as the porous carbon carrier can effectively improve the conductivity of the sodium supplement agent as a skeleton, the high conductivity improves the DCR of the sodium ion battery, improves the kinetic performance, and thus improves the electrochemical performance of the sodium ion battery.
Owner:JIANGSU ZENIO NEW ENERGY BATTERY TECH CO LTD
A mural reinforcing protective agent, a preparation method and application thereof
ActiveCN117757308Bimprove protectionincrease profitCellulose coatingsPainting preservationNanoparti clesBacterial cellulose
The application discloses a mural reinforcing protective agent and a preparation method and application thereof, belongs to the technical field of cultural relic restoration, and can solve the technical problems that existing mural reinforcing materials cannot reinforce the lower layer structure of ancient murals and are prone to being attached to the surface of murals to cause the whitening of the surface pigments. The mural reinforcing protective agent comprises a bacterial cellulose carrier and Ba(OH)2 nanoparticles loaded on the bacterial cellulose carrier in situ. The application plays a reinforcing role on the lower layer structure of murals, realizes deep reinforcement of ancient murals, improves the protection effect, stability and durability, and the surface of the mural will not be whitened.
Owner:SHAANXI PROVINCIAL INST OF CULTURAL RELICS PROTECTION
Bentonite-regulated solar-driven light-heat-electricity conversion composite phase change material, and preparation method and application thereof
The application discloses bentonite-regulated solar-driven light-heat-electricity conversion composite phase change material and a preparation method and application thereof, and relates to the technical field of phase change energy storage materials and solar energy utilization. The material is prepared by using bacterial cellulose aerogel as a porous framework, fixing MXene and TiN nanoparticles on the framework through cross-linking and gradient assembly to construct a light-heat-heat conduction network, dispersing bentonite intercalation in a polyethylene glycol matrix to form a composite phase change material, and then encapsulating the composite phase change material in the multistage pores of the aerogel. The surface of the framework has a hydrophobic modification layer. The preparation method comprises the steps of etching, aerogel framework construction, vacuum impregnation encapsulation and hydrophobic modification. The material has high light-heat conversion efficiency, high heat conduction promotion rate, excellent leakage prevention performance, fast crystallization characteristics and super-hydrophobic self-cleaning ability. When the material is combined with a thermoelectric power sheet, a solar light-heat-electricity conversion system can be constructed, and the material has a wide application prospect in the field of renewable energy.
Owner:GUANGXI UNIV
Preparation method of graphene / nano bacterial cellulose composite material
The invention relates to a preparation method of a graphene / nano bacterial cellulose composite material, which comprises the following steps: (1) dispersing nano cellulose and graphene in an aqueous medium to form a uniform suspension; (2) constructing a three-dimensional porous skeleton through freeze drying; the preparation process is simple and controllable, only through the carbonization temperature and time regulation function, complex chemical modification or a multi-layer composite structure is not needed. The raw materials are green and low in cost, the cellulose source is wide (such as wood pulp and straw), and no precious metal or high-pollution reagent exists in the carbonization process. The device is suitable for roll-to-roll continuous carbonization (such as infrared radiation heating) and is compatible with an existing carbon material production line.
Owner:NINGBO GRAPHENE INNOVATION CENT CO LTD
Preparation method of dumbbell array storage type hollow bacterial cellulose hydrogel transdermal patch
The invention discloses a preparation method of a dumbbell array storage type hollow bacterial cellulose hydrogel transdermal patch, which comprises the following steps: uniformly mixing basic components of PDMS (Polydimethylsiloxane) with a curing agent to obtain a solution A; adding an organic solvent to obtain a solution B; adding ultrapure water to form a PDMS emulsion; pouring the PDMS emulsion on a mold, and heating and curing to obtain a PDMS sponge mold; performing static culture on the PDMS sponge mold on the bacterial liquid to obtain the bacterial cellulose hydrogel transdermal patch; putting the bacterial cellulose hydrogel transdermal patch into a NaOH solution, boiling, cooling to room temperature, and replacing the NaOH solution with deionized water until the pH is neutral, so as to obtain the dumbbell array storage type hollow bacterial cellulose hydrogel transdermal patch. According to the preparation method disclosed by the invention, the individualized dumbbell array storage type hollow bacterial cellulose hydrogel transdermal patch is synthesized through self-assembly of a PDMS sponge mold mediated bacterial interface, and the transdermal patch can be used for efficiently carrying drugs, slowly releasing for a long time and conformally attaching and is excellent in air permeability.
Owner:TIANJIN UNIVERSITY OF TECHNOLOGY
SERS (Surface Enhanced Raman Scattering) flexible sensor based on dual-ion modification as well as preparation method and application thereof
PendingCN121954838Ahigh selectivityhigh sensitivityRaman scatteringIonophoric ActivityKynurenic acid
The invention discloses an SERS (Surface Enhanced Raman Scattering) flexible sensor based on dual-ion modification as well as a preparation method and application of the SERS flexible sensor, and belongs to the technical field of biomedical detection. A bacterial cellulose membrane (BCM) is used as a base material, cation modification (QBCM) is carried out through glycidyl trimethyl ammonium chloride (EPTMAC), anion modification (TABCM) is carried out through tannic acid (TA), a functional substrate with asymmetric charge distribution and a porous structure is constructed, then Ag NPs are loaded on the modified base material through an in-situ reduction method, the QBCM-coated AgNPs and TABCM-coated AgNPs dual-ion active substrate is formed, and the AgNPs / TABCM-coated AgNPs dual-ion active substrate is used for preparing the composite material. The SERS flexible sensor is integrated through a layer-by-layer self-assembly (LbL) technology; the SERS flexible sensor can realize specific enrichment and synchronous detection of anionic kynurenic acid (KYNA) and cationic spermine (Spm) in urine, and is low in detection limit and good in reproducibility.
Owner:FUJIAN NORMAL UNIV
Methods of fabrication of environmentally friendly supertcapacitor and performance for real world applications
Our invention is about synthesis, fabrication, assembly, packaging, testing of asymmetric flexible supercapacitors utilizing bacterial cellulose, conducting polymer, activated carbon, aqueous electrolyte, having state-of-art pseudocapacitive properties; namely, high-power, high energy and high cycle life. The high capacitive performance of these types of supercapacitors is controlled by the chemical, physical, and electrical properties of the materials used for synthesis and fabrication methods for device assembly and packaging as described here-in. Bacterial cellulose is exposed as a high surface area, fibrous nanomaterial used as a source of carbon fiber for the fabrication of high-performance supercapacitor electrodes. The use of pyrolyzed bacterial cellulose, conducting polymer materials, aqueous electrolytes, non-toxic binders such as carboxy methyl cellulose dispersed in water, device fabrication, and packaging techniques produces batch production of flexible supercapacitors with high performance characteristics.
Owner:RAM MANOJ KUMAR +2
Control method for prolonging fermentation period of yeast for making hard liquor based on moisture retention of bacterial cellulose membrane
PendingCN121555701AMicrobiological testing/measurementAlcoholic beverage preparationBiotechnologyMicrobiology
The invention discloses a control method for prolonging a yeast fermentation period based on moisture retention of a bacterial cellulose membrane, which comprises the following steps: S1, preparing nano-scale bacterial cellulose, and preparing a cellulose suspension based on the nano-scale bacterial cellulose; s2, preparing a yeast basic blank, adding the cellulose suspension into the yeast basic blank, uniformly stirring, and performing compression molding to obtain a yeast blank; s3, preparing moisturizing film spray from the cellulose suspension, a thickening agent and an auxiliary moisturizing agent, and uniformly spraying the moisturizing film spray on the outer surface of the yeast blank; and S4, transferring the yeast blank sprayed with the spray into a fermentation workshop for fermentation. According to the method, a stable and high-humidity microenvironment can be constructed, and the water evaporation rate is effectively slowed down on the premise of not changing the core of a traditional process, so that the whole fermentation process is actively delayed, time conditions are created for sufficient synthesis and accumulation of flavor substances in the yeast for making hard liquor, and finally the purpose of remarkably improving the aroma richness and physicochemical indexes of the yeast for making hard liquor is achieved.
Owner:SICHUAN VOCATIONAL COLLEGE OF CHEM TECH
Temperature-sensitive amidoxime-modified bacterial cellulose hydrogel, its preparation method and application
The present application provides a kind of temperature-sensitive amidoxime modified bacterial cellulose hydrogel and its preparation method, it is related to novel adsorbent material technical field.The present application is prepared by gradient temperature method after the amidoxime modification of bacterial cellulose and certain proportion of temperature-sensitive monomer N-isopropyl acrylamide, initiator 2,2'-azo (2-methylpropylimid) dihydrochloride and crosslinking agent N,N-methylene bisacrylamide to obtain hydrogel.Among them, the amidoxime modification of bacterial cellulose improves the uranium adsorption capacity and the selectivity to uranium, and after the preparation of hydrogel, the addition of temperature-sensitive monomer also speeds up the adsorption rate of hydrogel to uranium.The preparation method is simple and fast, and the cost is low;The modified hydrogel material has good temperature sensitivity, high adsorption efficiency, high selectivity and can be reused repeatedly.
Owner:HAINAN UNIV
Self-supporting sulfide solid electrolyte membrane and preparation method and application thereof
The invention relates to the field of batteries, in particular to a self-supporting sulfide solid electrolyte membrane as well as a preparation method and application thereof. The self-supporting sulfide solid electrolyte membrane comprises a sulfonated bacterial cellulose aerogel skeleton and a sulfide solid electrolyte compounded on the sulfonated bacterial cellulose aerogel skeleton. According to the solid electrolyte membrane, the affinity of a cellulose skeleton and sulfide electrolyte powder is improved mainly by introducing the cellulose skeleton into a sulfonic acid group, so that the cellulose skeleton is fully filled, and the ionic conductivity of the electrolyte membrane is improved.
Owner:CHINA FAW CO LTD
An MXene / BC@CoFe2O4 electromagnetic shielding aerogel, its preparation method and application
The application belongs to the technical field of electromagnetic shielding materials, and relates to MXene / BC@CoFe2O4 electromagnetic shielding aerogel and a preparation method thereof. The electromagnetic shielding aerogel is composed of MXene, bacterial cellulose (BC) and cobalt ferrite (CoFe2O4) grown by a co-precipitation method, contains anisotropic MXene porous structure, and BC@CoFe2O4 forms a three-dimensional magnetic network. Nano-magnetic particles CoFe2O4 are grown on bacterial cellulose by a co-precipitation method; the bacterial cellulose with the nano-magnetic particles CoFe2O4 grown thereon is mixed with a MXene dispersion liquid to occur liquid self-assembly, thereby forming an aerogel precursor; and a directional three-dimensional porous structure is formed by using a liquid nitrogen directional freezing method. The magnetic particles of the MXene / BC@CoFe2O4 electromagnetic shielding aerogel can cause magnetic loss to electromagnetic waves, the MXene with good electrical conductivity causes impedance mismatch with electromagnetic waves, reflects electromagnetic waves, and the bacterial cellulose can enhance the mechanical properties of the aerogel.
Owner:SOUTHEAST UNIV
Preparation method of multifunctional carbon nitride / carbon composite aerogel and application of multifunctional carbon nitride / carbon composite aerogel in oil-water separation in multiple extreme scenes
The invention discloses a preparation method of multifunctional carbon nitride / carbon composite aerogel and application of the multifunctional carbon nitride / carbon composite aerogel in oil-water separation in multiple extreme scenes, and relates to the technical field of aerogel functional materials. The preparation method of the composite aerogel comprises the following steps: (1) completely immersing bacterial cellulose gel into deionized water, removing residual impurities, and cutting the bacterial cellulose gel into regular blocks; and (2) soaking the bacterial cellulose block in the step (1) in a precursor solution of carbon nitride to obtain bacterial cellulose / precursor composite hydrogel, and performing directional freezing and freeze drying to obtain the bacterial cellulose / precursor composite aerogel. And (3) calcining the aerogel obtained in the step (2) to finally obtain the carbon nitride / carbon composite aerogel. The multifunctional carbon nitride / carbon composite aerogel prepared by the preparation method disclosed by the invention has the capabilities of resisting oil-water separation in various extremely severe environments, such as flame retardance, high and low temperature resistance, fatigue resistance and bacterium resistance, and provides possibility for application in more oil-water separation scenes in the future.
Owner:HARBIN INST OF TECH
Electromagnetic shielding composite material with active and passive infrared stealth function and preparation method thereof
ActiveCN121609954BMagnetic/electric field screeningCellulose coatingsCarbon nanotubeMagnetite Nanoparticles
The application relates to the technical field of electromagnetic shielding materials, and particularly discloses an electromagnetic shielding composite material with active and passive infrared stealth functions and a preparation method thereof. The composite material comprises an electromagnetic wave reflection layer and a multilayer electromagnetic wave absorption layer. The electromagnetic wave reflection layer is silver-plated bacterial cellulose, and high-efficiency electromagnetic wave reflection is realized by utilizing the high conductivity of the silver-plated bacterial cellulose. The electromagnetic wave absorption layer is composed of bacterial cellulose, multi-walled carbon nanotubes and core-shell magnetic nanoparticles, and from the side close to the electromagnetic wave reflection layer to the outside, the content of the multi-walled carbon nanotubes decreases, and the content of the core-shell magnetic nanoparticles increases, so that a gradient structure is formed; the gradient design can improve the surface impedance matching, promote the electromagnetic wave to enter the material interior, and enhance the electromagnetic loss through the interlayer multiple reflection-absorption process. The material has the functions of high-efficiency electromagnetic shielding and active and passive infrared stealth.
Owner:ANHUI UNIV +1
Composite solid electrolyte separator and method of making same
ActiveCN121238157BImprove stabilityImprove uniformityCell seperators/membranes/diaphragms/spacersSecondary cellsSolid state electrolyteComposite electrolyte
This invention provides a composite solid-state electrolyte membrane and its preparation method, relating to the field of lithium battery technology. It comprises the following components in parts by weight: 15-25 parts flame-retardant microcapsules with a core-shell structure; the shell being EDTA-modified LATP nanoparticles and the core being expanded monomers; 20-30 parts amino-modified carbon nitride; 60-80 parts bacterial cellulose membrane; and 40-60 parts polyethylene oxide particles. The composite electrolyte membrane exhibits high thermal stability and dimensional stability. The uniform deposition of each component in the microstructure forms a continuous phase, providing a rapid channel for ion migration and conduction, significantly improving battery performance and safety.
Owner:PHYLION BATTERY (CHUZHOU) CO LTD +1