75 results about "Modified cellulose" patented technology

The application discloses a preparation method of a high-stability cellulose nanofluid film, and a product and application thereof, and belongs to the field of energy conversion and material science. The method comprises the following steps: adding modified cellulose into an ionic liquid to prepare a solution by heating; dropping and coating the solution onto the surface of a porous polymer film, and preparing a gel film by heating and vacuum treatment; and obtaining the nanofluid film after water soaking and drying of the gel film. The nanofluid film adopts an embedded structure, the cellulose layer is a small-pore structure, the porous polymer film is a large-pore structure, and the nanofluid film has etching and three-dimensional network channel structures. The preparation process is simple and the conditions are mild, the prepared film has excellent ion rapid selective transmission performance, acid-base stability and long-term operation stability, can efficiently convert salinity gradient energy into electric energy, and has a good application prospect in the field of salt-difference osmotic energy utilization.

The application discloses a kind of sanitary facing layer water guide type spunlace material and preparation method thereof, comprising the following steps: step 1: (1) different molecular weight polyethylene glycol diacrylate is copolymerized with monomer, wet spinning is carried out, and zinc stearate aqueous dispersion is used to treat, to obtain superabsorbent fiber A, B;(2) polyethylene glycol diacrylate is copolymerized with monomer, modified cellulose fiber is added, wet spinning is carried out, and aluminum sulfate aqueous solution treatment, zinc stearate aqueous dispersion treatment are sequentially used, to obtain superabsorbent fiber C;Step 2: superabsorbent fiber A, superabsorbent fiber B, superabsorbent fiber C and fiber are respectively prepared into composite viscose fiber layer A, composite bamboo fiber layer B, composite bamboo fiber layer C;Hydrophilic PP fiber layer is laminated, spunlace treatment is carried out, dehydration is carried out, and drying treatment is carried out, to obtain water guide type spunlace material.The product of the application has higher moisture absorption capacity and anti-back seepage capacity.

The utility model discloses a kind of moisture-absorbing and releasing antibacterial deodorization anti-mite multifunctional flocculus, it is related to textile technology field, including flocculus body, flocculus body includes moisture-absorbing and deodorization layer, moisture-absorbing and antibacterial layer and moisture-absorbing and anti-mite layer sequentially arranged along its thickness direction;Moisture-absorbing and deodorization layer is composed of moisture-absorbing and deodorization modified cellulose fiber, moisture-absorbing and antibacterial layer is composed of moisture-absorbing and antibacterial modified cellulose fiber, moisture-absorbing and anti-mite layer is composed of moisture-absorbing and anti-mite modified cellulose fiber;Moisture-absorbing and deodorization layer, moisture-absorbing and antibacterial layer and moisture-absorbing and anti-mite layer are integrated by nonwoven process, with moisture-absorbing and releasing function, with deodorization, antibacterial, anti-mite and other multiple effects simultaneously, greatly satisfy people's daily life needs.

[Problem] To provide a method for hydrophobizing cellulose that can be used as a substitute for plastic, and hydrophobized modified cellulose. [Solution] The aforementioned problem is solved by a method in which a cellulose-containing material is immersed in or brought into contact with a lignin / PVA solution or a lignin / hemicellulose solution, a complex of the lignin and the PVA or the hemicellulose is adsorbed onto a hydrophilic surface of the cellulose-containing material, and the lignin is adsorbed onto a hydrophobic surface of the cellulose-containing material. Examples of the modified-cellulose-containing material include: natural cellulose, such as paper materials; and regenerated cellulose fibers, such as viscose rayon, cupra, and Tencel (Lyocell).

This invention discloses a method for preparing melanin-modified cellulose composite aerogel. This method involves pretreatment, modification, and compounding solutions, controlling the experimental monomers and reaction conditions to obtain the melanin-modified cellulose aerogel. The prepared melanin-modified cellulose aerogel exhibits excellent photothermal properties, and the preparation method and process are simple and easy to implement. The preparation method of the melanin-modified cellulose composite aerogel of this invention includes the following steps: 1) preparation of polydopamine-modified cellulose; 2) preparation of melanin-modified cellulose material; 3) preparation of melanin-modified cellulose aerogel material: the melanin-modified cellulose material obtained in step 2) is added dropwise to a crosslinking agent and continuously stirred to carry out a chemical crosslinking reaction. The resulting mixed solution is poured into a PE mold, placed in an oven to crosslink, and finally freeze-dried under vacuum to obtain the melanin-modified cellulose composite aerogel.

The present application relates to the technical field of stabilizer in oilfield operation, in particular to a kind of fiber structure stabilizer for fracturing and a preparation method thereof, nitrogen-doped modified graphene oxide in the present application is realized nitrogen atom doping by the compounding of chitosan and graphene oxide and high-temperature heat treatment, both the high specific surface area and mechanical strength characteristics of graphene are retained, and active sites are introduced by nitrogen doping, the adsorption and combination capacity with fiber network is enhanced, three-dimensional support skeleton is formed in fracturing fluid, effectively resist formation pressure impact, prevent fiber structure collapse;Secondly, crosslinking modified cellulose forms network structure by epoxy chloropropane crosslinking, which can significantly improve the temperature resistance and salt tolerance of cellulose, the modified cellulose molecular chain not only maintains the dispersion characteristics of hydrophilic carboxyl group, but also introduces hydrophobic interaction through tertiary amine group, forming a double stabilizing mechanism of hydration layer and hydrophobic microzone in fracturing fluid, enhancing the shear resistance of fiber bundle.

This invention provides an environmentally friendly oilfield displacement agent and its preparation method. The displacement agent comprises the following components in parts by weight: 0.1-0.5 parts modified cellulose, 40-60 parts amphoteric surfactant, and 50-70 parts water. The displacement agent prepared by this invention exhibits low interfacial tension, high oil recovery, and good high-temperature and high-salt stability. This indicates that the invention, through the synergistic effect of the amphoteric surfactant and modified cellulose, reduces the oil-water interfacial tension, effectively improving oil washing efficiency. The introduction of sulfonic acid groups into the amphoteric surfactant and modified cellulose allows the displacement agent to maintain good performance even at high temperatures and high salinity. Furthermore, the displacement agent prepared by this invention poses no environmental residue risk and demonstrates excellent environmental performance.

This invention relates to functional polymer composite materials, the utilization of renewable biomass polymer resources, and the field of thermal management technology for new energy vehicle batteries. Specifically, it relates to an environmentally friendly insulating and thermally conductive material for new energy batteries and its preparation method. The aim is to solve the inherent contradiction between thermal conductivity and insulation, and the conflict between high thermal conductivity requirements and lightweight and flexibility requirements. The material of this invention is formed by mixing and cross-linking components A and B. Component A mainly includes: castor oil-based polyurethane prepolymer with UPy quadruple hydrogen bond units in its side chains, porous boron nitride microspheres modified with polydopamine coating, modified cellulose nanocrystals containing methacrylate reactive groups, and a reactive flame retardant; Component B mainly includes: a bio-based polyol crosslinking agent, modified porous boron nitride microspheres, modified cellulose nanocrystals, and a melamine polyphosphate synergistic flame retardant.

The present application relates to a kind of composite carrier loaded polyolefin catalyst and its preparation method and application, catalyst is with metal organic framework modified cellulose composite material as carrier, in situ load metallocene compound as catalytically active component;Preparation method includes the following steps: (1) with cellulose powder, metallocene compound, metal salt and organic ligand as raw material, preparation is obtained metallocene@MOFs / cellulose;(2) metallocene@MOFs / cellulose is dispersed in solvent, methylaluminoxane solution is added to carry out reaction, and the composite carrier loaded polyolefin catalyst of the present application is obtained.Compared with prior art, the preparation process of the present application is simple and fast, and the ash content in the polymer powder produced by the polymerization reaction using the catalyst of the present application is reduced by 75% compared with the existing silica gel carrier.

This invention relates to a method for preparing modified cellulose fiber nonwoven materials for ice crystal films. A porous membrane, consisting of a cellulose fiber spunlace nonwoven fabric with a three-dimensional texture, is tightly sandwiched between a soluble metal anode and an inert cathode to construct an electrolytic cell. The electrolytic cell is immersed in an electrophoretic modification solution containing negatively charged biocompatible macromolecules. A DC voltage is applied between the two electrodes, driving the macromolecules to actively penetrate into the spunlace nonwoven fabric via an electric field. An electrochemical oxidation reaction causes the soluble metal anode to release crosslinking ions in situ. These crosslinking ions then react with the migrated macromolecules in situ, forming a gel network within the fiber network. Finally, the product is obtained after rinsing and drying. This invention makes the preparation process more efficient, achieving deep and uniform penetration and efficient in-situ fixation of the modifier in the fiber substrate. It also protects and even strengthens the original physical texture during the modification process, resulting in high-performance gel mask materials.

A preparation method and application of modified carboxymethyl cellulose belong to the technical field of environmental remediation and fixation. The present application solves the problems that the removal effect of the existing modified cellulose in soil remediation is poor, and the existing modification method of cellulose is carried out in a non-water organic solvent system, and the reaction time is long. Method: carboxymethyl cellulose is dissolved in pure water, then N-hydroxysuccinimide and melamine are dissolved in sequence, then EDC·HCl aqueous solution is added, stirring at room temperature, and finally washing and freeze-drying to obtain modified carboxymethyl cellulose; application: it is used for controlling soil mercury release. The present application is used for the preparation and application of modified carboxymethyl cellulose.

This invention belongs to the field of affinity membrane and bioseparation technology, and provides a cellulose-based affinity membrane for hepatitis B virus (HBV), its preparation method, and its application. The affinity membrane consists of a base membrane and an affinity ligand immobilized on the base membrane. The base membrane is a carboxylated cellulose filter membrane or a carboxylated modified cellulose filter membrane. The affinity ligand is a biomolecule that specifically recognizes HBV surface antigen. The carboxyl groups of the base membrane and the amino groups of the affinity ligand are linked by amide bonds. Unreacted carboxyl groups on the base membrane are blocked by a blocking reagent. The carboxyl content of the base membrane is 400-1000 μmol / g, the pore size is 400-1000 nm, and the porosity is 30%-60%. The application refers to the use of the above-mentioned affinity membrane in the specific clearance of HBV from HBV-positive plasma. This invention can achieve efficient and specific clearance of HBV from plasma, maximally preserving the activity and function of normal plasma components, and improving the feasibility of industrial application.

This application discloses a solid electrolyte separator based on esterified cellulose and its preparation method, specifically including the following steps: first, esterified cellulose derivatives are obtained by modifying cellulose acetate as a base with 4-methylphthalic anhydride; then, the esterified cellulose derivative is dissolved in N,N-dimethylformamide with lithium bis(trifluoromethanesulfonylimide) and succinate, mixed evenly, coated onto a mold, and vacuum dried to obtain the separator. This separator exhibits good mechanical properties and interfacial stability, effectively suppressing lithium dendrite growth and improving battery safety. Lithium metal batteries assembled using this separator demonstrate high discharge specific capacity and good cycle stability, making them suitable for high-energy-density solid-state lithium batteries.

This specification discloses a process for purifying conjugated polymers. The process comprises dissolving the conjugated polymer in a solvent to form a solution, adding an agent to the solution to produce an agent carrying impurities, and removing the agent carrying impurities from the solution to obtain a purified conjugated polymer, wherein the agent is at least one of metal scavenger resins, ion exchange resins, activated clay, charcoal, silica, alumina, diatomaceous earth, cellulose, modified cellulose, and any combination thereof. A process for analyzing the purity of the purified conjugated polymer is also disclosed. The purified conjugated polymer is dried to form a thin layer, thermally decomposed, subjected to chemical digestion with a mixture of nitric acid and hydrochloric acid, and then subjected to ICP-MS analysis. The purified conjugated polymer is used in organic electronic applications and / or devices.

The application discloses modified cellulose ether and a preparation method thereof, and relates to the technical field of building materials. The modified cellulose ether is prepared from hydroxyethyl methyl cellulose, hydroxypropyl methyl cellulose ether, air entraining agent and other additives, and specific modified starch ether. The modified starch ether is prepared from starch as a matrix through two-step reactions of grafting a hydroxyl monomer and etherification of a hydroxypropyl monomer. The modified cellulose ether has synergistic effects of various components, relies on the unique molecular structure of the modified starch ether, greatly improves water retention performance, construction workability and plasticity retention capacity, and has better water retention rate, scraping feeling and open time than pure hydroxypropyl methyl cellulose. Different monomer types and ratios have a significant influence on core performance, and the modified cellulose ether can fully play the roles of thickening, anti-sagging and anti-slippage and has excellent water retention rate in building mortar and other materials.

Methods of modifying properties of a cellulosic material include depositing an additive onto the cellulosic material, the additive being in a vapor phase and configured to modify one or more properties of the cellulosic material and adsorbing the additive into the cellulosic material, wherein the additive reacts with one or more functional groups of the cellulosic material. The depositing can be an atomic layer deposition of the additive onto the cellulosic material. The additive can be configured to react with a nucleophile in the cellulosic material. One or more properties of the cellulosic material can include hydrophobicity, thermal conductivity, thermal diffusivity, fungo-toxicity, toxicity, wettability, tensile strength, corrosiveness, biodegradability, bio-toxicity, or swelling.

This invention discloses a narrow-distribution functionalized aqueous latex and its preparation method, belonging to the field of aqueous latex preparation technology. The latex uses functionalized monomers, aromatic vinyl monomers, and aliphatic conjugated diene monomers as main raw materials, introduces silane coupling agent-modified cellulose nanocrystals, and combines them with an initiator, emulsifier, and water, undergoing one-step emulsion polymerization. The modified cellulose nanocrystals can form a physical barrier on the surface of the latex particles, reducing the content of embedded acid and free acid in the aqueous phase, and increasing the surface carboxyl group density; its rigid structure forms a three-dimensional network after film formation, effectively suppressing the volume expansion of the silicon anode. The resulting latex has a particle size of 245~255nm, a narrow particle size distribution, moderate viscosity, and high bonding strength. When used as a lithium battery anode binder, it exhibits high electrode peel strength, good slurry dispersibility, and excellent battery cycle stability. This invention features a simple process, readily available raw materials, and easy industrial scale-up, making it suitable for lithium battery anode binders, paper coating, and aqueous adhesives.

The application discloses a cigarette paper containing natural degradable particle fillers; the natural degradable particles are modified cellulose particles, calcium alginate particles or mixtures thereof; and the particle size is 1-5 μm. The application also discloses a preparation method of the cigarette paper and an application for improving the ash packing performance of the cigarette.

The application discloses a preparation method of a UV photocuring, solvent-free type nickel inner electrode paste, and specifically comprises the following steps: step 1, preparing acrylic modified cellulose microfibril; step 2, synthesizing a UV photocuring resin; step 3, synthesizing a nickel complex; step 4, preparing a nickel inner electrode paste according to the products obtained in steps 1-3; and step 5, preparing a ceramic paste according to the product obtained in step 4. The application further discloses the UV photocuring, solvent-free type nickel inner electrode paste and application thereof in multilayer ceramic capacitors. The electrode paste prepared by the application does not need to remove solvent by heating, avoids the problem of uneven solvent drying, and improves the yield and performance of devices.

The application discloses a method for preparing an amidoxime modified cellulose-oxidized graphite composite uranium adsorbent by irradiation, and belongs to the field of uranium-containing radioactive wastewater treatment. The present application aims at solving the problems of low grafting rate of the existing cellulose surface, limited number of functional sites for uranium, and uranium adsorption performance to be improved. The method comprises the following steps: 1, preparing acrylonitrile grafted cellulose by irradiation; 2, amidoxime modification; and 3, adding oxidized graphite. The application is used for preparing an amidoxime modified cellulose-oxidized graphite composite uranium adsorbent by irradiation.

The application belongs to the technical field of soil remediation, and discloses a composite fluid material for stabilizing disturbed soil and a soil treatment method, characterized in that the composite fluid material comprises the following components: a composite liquid of a modified polysilicate solution and a biodegradable polylactic acid microemulsion, chemically modified cellulose short fiber material, a high molecular polymer, a non-ionic surfactant, a calcium chloride aqueous solution, a microbial agent and a composite mineral nutrient mixture, and water. Through deep penetration and three-dimensional consolidation mechanism of the composite fluid material, a continuous consolidation layer with high toughness and high shear strength is formed, which effectively resists raindrop impact and runoff scouring, avoids cracking and peeling of the surface crust and loss of the underlying soil; the combination of the biodegradable polylactic acid microemulsion, the slow-release microbial agent and the composite mineral nutrient provides immediate protection and continuously improves the soil physical and chemical properties and biological activity during the material degradation process.

The application provides a hydrophilic modified cellulose ultrafiltration membrane and a preparation method thereof, physical dissolution of cellulose is carried out by using a good solvent NMMO.H2O of cellulose, natural characteristics of the cellulose are retained more, and the prepared flat membrane or hollow fiber membrane shows good mechanical properties and acid and alkali resistance; modified cellulose is prepared by using an oxidant oxidation and chemical modification technology, crystallinity of the cellulose membrane can be effectively reduced, hydrophilicity is improved, water flux of the cellulose membrane is improved, and the anti-pollution ability is improved, the membrane preparation process is simple, the solvent NMMO.H2O is easy to recycle, and the process is green and environment-friendly; the modified cellulose ultrafiltration membrane prepared by the application has very strong hydrophilicity, high flux and strong anti-pollution ability, is suitable for liquid separation fields, such as water treatment, food fields or separation of polar and non-polar liquid alcohol and ketone mixtures in the field of pervaporation, and has good application prospects in medical dialysis, membrane extraction, membrane absorption and the like.

This invention discloses a gray-carbon pelletized calcium carbide and its preparation method, relating to the field of calcium carbide material technology and belonging to patent classification number C01B32 / 942. The preparation method involves: acid activation, cetyltrimethylammonium bromide modification, and high-energy ball milling of bentonite to prepare a nano-sized bentonite binder; graft copolymerization of starch and acrylic acid, followed by epichlorohydrin crosslinking and hydrophobication with a silane coupling agent to prepare a hydrophobic grafted starch binder; composite of polyethylene glycol-modified cellulose nanofibers with the above two binders, followed by high-speed shear emulsification to obtain a composite binder; mixing gray carbon and quicklime powder, adding the composite binder, and molding to obtain raw blocks; and pyrolyzing the raw blocks under an inert atmosphere to obtain gray-carbon pelletized calcium carbide. The calcium carbide raw blocks and calcium carbide pellets prepared by this invention exhibit excellent mechanical strength.

The application relates to the technical field of energy storage, and provides a battery monomer, a preparation method of the battery monomer, a battery device, a power utilization device and an energy storage device. The battery monomer comprises: an electrode core assembly, the electrode core assembly comprises a negative electrode sheet, a diaphragm and a positive electrode sheet which are arranged in a stack; a shell, the electrode core assembly is located in the shell; and an electrolyte, the electrolyte is located in the shell; the electrolyte contains modified cellulose nanocrystals, the surface of the modified cellulose nanocrystals is provided with a hydrophobic group, and the specific surface area of the modified cellulose nanocrystals is not less than 150 m 2 / g. Through the synergistic effect of the high specific surface area of the cellulose nanocrystals and the specific surface modification group, a modified SEI layer which has flexibility and ionic conductivity is formed at the electrode interface, so that the cycle stability and the first cycle coulombic efficiency of the battery are significantly improved.

The application discloses a kind of topological structure lignin microspheres / modified fiber composite membranes, preparation method and application, it is related to wastewater treatment technical field.The application includes the following steps: S1, preparation hydrophobic double bond lignin, and then topological structure lignin microspheres suspension liquid is prepared;S2, using sulfamic acid to modify cellulose fiber, the obtained sulfonated cellulose is handled, and anionic fiber dispersion is obtained;S3, cellulose fiber is treated with alkali activation, and the obtained alkali activation fiber is modified with cationization, and then the cationization fiber is post-treated, and cationization fiber dispersion is obtained;S4, topological structure lignin microspheres / modified fiber composite membrane is prepared based on topological structure lignin microspheres suspension liquid, anionic fiber dispersion and cationization fiber dispersion.The composite membrane prepared in the application has better separation effect on cationic dyes.

This invention discloses a flexible capacitive pressure sensor and its fabrication method. The fabrication method includes the following steps: S1. Fabrication of breathable flexible electrodes: A porous and breathable TPU film is prepared using the breath diagram method, and then a conductive layer is formed on the upper surface of the TPU film using silver nanowire ink; S2. Fabrication of a sponge-like insulating dielectric layer: Mxene nanosheets and silane-modified cellulose nanocrystals are ultrasonically dispersed in anhydrous ethanol to obtain a dispersion, then PDMS base liquid, PDMS curing agent, and foaming agent are added, mixed evenly, poured into a film-forming mold, and heated to cure into a film; S3. Composite encapsulation: The breathable flexible electrodes are respectively adhered and fixed to the upper and lower surfaces of the sponge-like insulating dielectric layer by a flexible epoxy resin adhesive coated around the perimeter. The advantages of this invention are that the fabrication method is simple and low-cost; the resulting flexible capacitive pressure sensor can simultaneously achieve good breathability and a wide range of pressure sensing performance.

This invention discloses a method for preparing a modified cellulose filter membrane for lubricating oil regeneration, belonging to the field of lubricating oil regeneration treatment. The method comprises six sequential steps: preparation of film-forming solution, base membrane forming, base membrane activation, AKD-nano silica synergistic modification, crosslinking and curing, and post-treatment. First, cellulose is used as the raw material, and a film-forming solution is prepared using a green composite solvent. This solution is then cast and phase-inverted to obtain a cellulose base membrane. Next, dilute alkali activation is used to increase the surface active sites of the base membrane. Subsequently, alkyl ketone dimer (AKD) and nano silica are used for synergistic modification, achieving simultaneous hydrophobic modification, physical reinforcement, and pore size control of the filter membrane. Finally, crosslinking, curing, and post-treatment yield a high-performance modified cellulose filter membrane. This invention features closely linked steps, a green and environmentally friendly process, and is easily industrialized. The resulting filter membrane exhibits significantly improved oil resistance, mechanical strength, and pore size uniformity, resulting in high lubricating oil purification efficiency and a long service life.

The application discloses a method and reagent for preventing and treating insect pests of fruit trees by harmless physical and chemical methods, wherein the reagent comprises reagent A and reagent B; the reagent A is a surface hardening agent, and the reagent B is a hardening removal agent; the reagent A comprises sodium silicate and a bonding aid, and the reagent B comprises a weak acid substance and a chelating agent; or the reagent A comprises starch grafted acrylate and modified cellulose, and the reagent B comprises hemicellulase and pectinase. The application also discloses a method for preventing and treating insect pests of fruit trees by harmless physical and chemical methods, wherein the reagent A is sprayed on the surface of soil before the emergence of the insect pests, the surface soil layer is moistened, and the hardened surface is formed after drying, so that the insect pests cannot break through and are limited under the ground, and the crops cannot be damaged; and the reagent B is sprayed on the hardened surface after the emergence peak of the insect pests is over, and the soil returns to a loose state. By means of physical blocking, the natural life cycle window of the insect pests is utilized, efficient, zero-residue green prevention and control are realized, and the harm of chemical pesticides to the environment and human health is avoided.

This invention belongs to the technical field of drilling fluid filtration loss reducers, specifically relating to a hydroxynaphthalenesulfonic acid-modified cellulose drilling fluid filtration loss reducer, its preparation, and its application. The filtration loss reducer comprises hydroxynaphthalenesulfonic acid-modified cellulose; the cellulose is a carboxyl-modified cellulose; the monomeric structural formula of the hydroxynaphthalenesulfonic acid or hydroxynaphthalenesulfonate is shown below: The structural formula includes at least one -OH group at each position except for the sulfonic acid group. The filtration loss reducer exhibits excellent thermal stability, withstanding temperatures up to 200℃; strong resistance to salt and calcium / magnesium; effectively increasing drilling fluid viscosity, reducing filtration loss, and improving mud cake quality; inhibiting clay dispersion, controlling formation mud production, and ensuring drilling fluid cleanliness; reducing wellbore enlargement, which is beneficial for protecting oil and gas reservoirs. It is particularly suitable for seawater drilling fluid systems, and deep and ultra-deep well drilling fluid systems.