205results about How to "Improve liquid absorption performance" patented technology

The invention discloses a coal-based anode material, a preparation method and a lithium-ion battery. The coal-based anode material consists of a coal-based material graphitized inner layer, a middle layer and an outer layer distributed on the surface. The preparation method of the coal-based anode material comprises steps as follows: crushing a coal-based material; then adding a binder or mixing the binder and a modifier; then performing pressing and high-temperature graphitization to form a finished product. The coal-based anode material adopts a stable graphite structure, the surface has good compatibility with an electrolyte, and the coal-based anode material has the high specific capacity, the high conductivity, the high rate capability as well as excellent electrolyte absorbing performance and cycle performance. According to the preparation method, the anode material is prepared from the low-price coal-based material used as a raw material, the technology is simple, industrialization is easy to realize, and meanwhile, the application of the coal-based anode material in the field of the lithium-ion battery is promoted.

The invention discloses a method for preparing super absorbent resin with a cross-linked structure by using potato starch as the raw material, which comprises the following main processes: carrying out neutralization reaction between a sodium hydroxide solution and acrylic acid from which polymerization inhibitor is removed under the cooling of ice-water bath; mixing potato starch with de-ionizedwater and pasting the mixture; mixing the neutralized acrylic acid and the sodium salt solution thereof with the pasted potato starch; adding an evocating agent persulfate and a cross-linking agent N,N'- methylene-bisacrylamide; uniformly stirring the mixture under the protection of nitrogen; heating the mixture by water bath to rise the temperature so as to ensure that the potato starch and the acrylic acid and the sodium salt thereof generate graft copolymerization reaction under the protection of nitrogen; keeping the temperature of the reaction; and baking and crashing to obtain the superabsorbent resin with a cross-linked structure. Compared with similar products, the water absorption of the super absorbent resin is greatly enhanced and the super absorbent resin can absorb a certainamount of heavy metal ion. The super absorbent resin has great effect on the water conservation, the desert control, the environmental improvement and the like of soil in dry regions.

This invention discloses pole plates of Li ionic cells, in which, a micro-porous film is set on the pole plate with PVDF as the matrix and chemical gel formed by chimical cross-link is set in the micro-porous film.This invention also discloses a Li-ionic cell core with said pole plates and a preparation method including: the PVDF film forming chemical gel inside by irradiation and cross-link has the heat contraction rate of nearly zero under 100-220deg.C, which can prevent electronic short circuit of positive and negative pole plates caused by over contraction of intensified switchable Polyolefin micro-hole septums under high temperature when being coated on the pole plates.

The invention discloses a non-woven fabric based multi-layer composite diaphragm for a lithium ion battery and a preparation method of the multi-layer composite diaphragm. The non-woven fabric based multi-layer composite diaphragm comprises a non-woven fabric base material, an intermediate thermoplastic material coating and an outer-layer ceramic coating. The preparation method comprises the following steps of (1) mixing and uniformly stirring thermoplastic material particles, a binding agent and a solvent to form a mixed emulsion 1, and mixing and uniformly stirring inorganic particles, the binding agent and the solvent to form a mixed emulsion 2; and (2) uniformly applying the mixed emulsion 1 on one surface of the non-woven fabric base material, drying the mixed emulsion 1 to form the thermoplastic material coating, applying the mixed emulsion 2 on the thermoplastic material coating, drying the mixed emulsion 2 to form a ceramic coating, and rolling the ceramic coating to prepare a three-layer composite diaphragm. The three-layer composite diaphragm prepared according to the method has high-temperature obturator performance, favorable liquid absorption capability and mechanical property.

The invention discloses a battery diaphragm and application thereof. The battery diaphragm provided by the invention is composed of a base membrane and a nanoparticle coating coated on at least one surface of the base membrane. The nanoparticle coating contains at least two nanoparticles, which include ceramic particles and organic polymer particles. According to the battery diaphragm provided by the invention, the organic polymer particles are firstly added into the nanoparticle coating, thus not only enhancing the porosity of the nanoparticle coating, reducing the ionic conductivity of the battery diaphragm, but also enhancing the heat resistance of the battery diaphragm, decreasing the dosage of ceramic particles, and reducing the thickness of the nanoparticle coating. In addition, by adding the organic polymer particles, certain caking property exists between the battery diaphragm and the battery anode and cathode, so that the prepared battery has better oneness, and the diaphragm electrolyte solution wettability and absorption performance can also be improved, thus laying the foundation for providing lithium ion batteries with high security performance.

The invention relates to a multifunctional particle used for stopping human body wounds bleeding, filling, absorbing fluid, preventing adhesion and inducing tissue regeneration and repair. The absorbable particle with multiple functions of stopping bleeding, filling, absorbing the fluid, preventing the adhesion and inducing the tissue regeneration and repair comprises the following raw materials in weight percentage: 30-98.95 percent of polyanionic substance, 1-70 percent of cationic substance and/or polycationic substance, 0.05-2 percent of hyaluronic acid and/or functional factor polypeptide and 0-68.95 percent of pharmaceutical excipient. The particle is 0.01-1.0mm in particle size, and the particle is irregular in shape. The absorbable particle material with the multiple functions of stopping bleeding, filling, absorbing the fluid, preventing the adhesion and inducing the tissue regeneration and repair can be used for stopping the human body wounds bleeding, filling, absorbing fluid, preventing the adhesion and inducing the tissue regeneration and repair and is especially suitable for the wounds and defective tissues during minimally invasive surgery.

The invention discloses an ionic-electronic conductor composite film and a preparation method thereof and a lithium battery. The ionic-electronic conductor composite film comprises a base film rangingfrom 1 micron to 50 microns and a coating material ranging from 0.5 micron to 10 microns, wherein the coating material is spread on the base film or is spread on the base film and permeates into thebase film; the coating material comprises, by mass, ionic conductor materials [1wt%-99.98wt%], electronic conductor materials [0.01wt%-10wt%], coat materials [0wt%-98.98wt%], adhesives [0.01wt%-10wt%], dispersing agents [0wt%-2wt%] and auxiliaries [0wt%-2wt%]; the ionic conductor materials specifically include one or multiple mixtures of an LISCION solid electrolyte material, an NASCION solid electrolyte material, a perovskite solid electrolyte material or a garnet solid electrolyte material and a derivative material; and the electronic conductor materials include one or more of carbon black,conductive graphite, carbon fibers, carbon nano tubes, acetylene black, Ketjenblack, graphene, metallic silver, metallic gold, vapor phase growth carbon fibers VGCF, conductive graphite KS-6 and carbon black SUPER-P.

The invention discloses a preparation method for a graphite anode material of a lithium ion battery. Fine graphite powder with a small particle size and an organic carbon source are taken as raw materials; through adoption of processes such as mixing, high temperature processing, graphitizing and sieving and through mixing of the fine powder and the organic carbon source in a heating environment, coating, kneading and secondary granulating effects can be realized; and under the adhering effect of the organic carbon source, the fine powder with the small particle size forms secondary particles. The anisotropy problem of the materials is solved, and the tap density of the materials is improved. According to the method, the turnover and device residual loss of the materials are reduced, the yield is high, the processes are simple, the energy consumption is low, the environment is protected, the surface coating effects of the materials are even, and the consistency is high. The prepared anode material is characterized in anisotropy, low iron impurity content, low initial irreversible capacity, low volume expansion, high liquid absorbency, high cycle performance, high cost performance and high comprehensive performance.

Disclosed is a preparation method for an artificial graphite negative electrode material for a lithium ion battery. Artificial graphite coke powder with small grain diameter and an organic carbon source are taken as the raw materials; the raw materials are subjected to procedures of mixing, high-temperature treatment, graphitization treatment, sieving and the like; the coke powder and the organic carbon source are mixed in a heating environment, and the effects of coating, mixing and holding, secondary pelleting and the like can be achieved; the small-particle coke powder can form secondary particles under the cohesive action of the organic carbon source; therefore, the problem of anisotropy of the material is solved, and the tap density of the material is improved; meanwhile, the artificial graphite negative electrode material is capable of lowering the material turnover and equipment residual loss, high in yield, simple in procedures, low in energy consumption, environment-friendly, uniform in the coating effect on the surface of the material, and high in consistency; and in addition, the prepared negative electrode material has the characteristics of isotropy, low iron impurity content, low initial irreversible capacity, small volume expansion, high absorbency, high circulation performance, high performance cost ratio, excellent comprehensive performance and the like.

The invention discloses a high-temperature resistant composite battery separator and a preparation method thereof. The high-temperature resistant composite battery separator comprises a base film anda high-temperature resistant coating layer, wherein the high-temperature resistant coating layer is coated on at least one surface of the base film and is formed by coating inorganic particles containing nanometer cellulose as a binding agent. In the composite battery separator, the nanometer cellulose is creatively used as the binding agent to prepare the high-temperature resistant coating layer,the interface bonding force of the coating layer and the base film is improved, the stripping strength of the composite battery separator is further improved, and the problems of falling and powder dropping of the coating layer are solved very well; with the addition of the nanometer cellulose, the inorganic particles are better in dispersion effect in water; moreover, the nanometer cellulose isused as the binding agent to form the coating layer, the high-temperature resistant composite battery separator is rapid in liquid conductivity and high in liquid absorption capability, gel is easilyformed after the electrolyte is absorbed, so that the composite battery separator can be attached onto a surface of an electrode very well, and the integral performance of the lithium ion battery is improved.

The invention belongs to the technical field of medical dressing, and discloses a carbon quantum dot/nano-silver alginate dressing and a preparation method and application thereof. A carbon quantum dot/nano-silver composite material is prepared from silver nitrate, polyethylene glycol 400, sodium citrate, ascorbic acid and carbon quantum dots; and the carbon quantum dot/nano-silver composite material is added to a sodium alginate solution to prepare the carbon quantum dot/nano-silver alginate dressing through an electrostatic spinning technology and a non-woven technology. According to the dressing prepared by the technology, the mechanical property of the alginate dressing can be significantly improved; meanwhile, the dressing has an excellent fluorescent display tracking function; the migration change and the accumulation condition of silver ions in a body can be effectively inspected; and a fast and effective detection method is provided for clinical supervision of the silver ions.

The invention belongs to the papermaking technical field, more specifically relates to a process for producing the high-molecular water-absorbent resin dust-free paper. The process for producing the high-molecular water-absorbent resin dust-free paper takes fluff pulp wood pulp fiber, hot melt composite fiber and high-molecular water-absorbent resin (SAP) as the raw materials and the dust-free paper is composed of three-layer mixing layers. The process for producing high-molecular water-absorbent resin dust-free paper comprises the following steps: mixing the raw materials through a molding case, penetrating through hot air, wherein a heat bonding point between the hot melt fiber and wood pulp fiber formed by surface melting and flowing which are generated by the hot melt fiber during the heating process has the heat bonding effect, spraying latex on the double faces of the paper web and then drying by hot-air in a drying cylinder, rewinding to obtain the finished product. The present invention has the beneficial effects that the dust-free paper has good penetration performance and imbibition capability, is capable of effectively holding liquid, minimizing the reverse osmosis of liquid and maintaining the dry surface of the product, and has less dust and high tensile strength.

The invention provides a preparation method for a waterborne PMMA composite coating diaphragm. The coating diaphragm is formed by coating one side or two sides of a polyolefin base membrane with mixed paste of modified PMMA and ceramic in one time; and the modified PMMA is obtained by performing crosslinking and modifying on the PMMA and a copolymer thereof by a crosslinking agent based on a certain proportion. The diaphragm is prepared from the mixed materials of the modified PMMA and the copolymer thereof and ceramic in a coating manner; and the coating layer only needs coating of one time, so that production cost is lowered, ventilation loss caused by thickness of the coating layer also can be lowered, and meanwhile, the thermal stability of the diaphragm is improved.

The invention discloses a carboxymethyl chitosan band-aid and a preparation method thereof, belonging to the technical field of medical dressings. The carboxymethyl chitosan band-aid comprises a matrix layer, a wound protection layer which is combined with one side surface of the matrix layer and a peeling layer which covers one side of the matrix layer and shields and protects the wound protection layer, wherein a wavy non-woven medical air-permeable adhesive tape of which one side surface is provided with an adhesive-carrying layer is used as the matrix layer; a carboxymethyl chitosan fiber non-woven fabric is used as the wound protection layer, one side surface of the wound protection layer is combined with an anti-adhesion membrane, and the other side surface of the wound protection layer is combined with the adhesive-carrying layer; and glassine paper is used as the peeling layer. The carboxymethyl chitosan fiber non-woven fabric is used as the wound protection layer, so that ideal effects of stopping bleeding, resisting bacteria, promoting healing and relieving pain can be embodied, and the air permeability and the solution absorption performance of the carboxymethyl chitosan band-aid are excellent.

The invention provides a paper-making reconstituted tobacco preparation method and a method for improving coating liquid absorbability of a paper-making reconstituted tobacco substrate. The paper-making reconstituted tobacco preparation method includes steps: 1) after extracting with an extracting agent, performing solid-liquid separation to obtain tobacco insoluble matters and tobacco extract liquid; 2) subjecting the tobacco insoluble matters to pulping, and performing net forming and pressing to obtain a wet substrate; 3) subjecting the wet substrate to drying, coating of bicarbonate and drying to obtain a substrate; 4) subjecting the tobacco extract liquid to refining concentration to obtain coating liquid; or adding organic acid after refining concentration to obtain the coating liquid; 5) coating the substrate with the coating liquid, and drying and slitting to obtain reconstituted tobacco. Liquid absorbability of the substrate is improved by thermal decomposition action of bicarbonate; preferably, coating liquid absorbability of the paper-making reconstituted tobacco substrate is improved by improving substrate infiltration performance of the coating liquid through reductionof residue content of the coating liquid.

The invention belongs to the technical field of lithium ion batteries, and particularly relates to a battery diaphragm. The battery diaphragm includes a diaphragm base layer and a hot-melt polymer layer arranged on at least one surface of the diaphragm base layer. The diaphragm base layer includes at least one of glass fibers and ceramic fibers, and first adhesive. The hot-melt polymer layer includes a hot-melt polymer and second adhesive. Compared with the prior art, the diaphragm has better thermal stability, higher mechanical strength and stronger liquid retention and absorption capacity. In addition, the invention provides a preparation method of the battery diaphragm and a lithium ion battery containing the diaphragm.

The present invention discloses a manufacturing method of industrial wiping papers, the method uses wood pulp as raw material and makes paper by wet paper machine and prepares products through dry method wrinkling. Said wood pulp is mixed and composed of long fiber pulp which fiber length is 2. 4-2. 6 mm and short fiber pulp which fiber length is 0. 75-1 mm, the weight ratio of the both is long fiber pulp: short fiber pulp = 8:2, the beating current is 320-360A. The invention has small equipment investment, the production cost is low, the prepared industrial wiping paper fiber bonded finely and closely, and has good imbibition performance and deoiling capacity, especially it is suitable for machinery industry such as automobile.

The invention discloses a preparation method of a biological ink material for 3D printing. The preparation method mainly comprises preparing modified sodium alginate, and preparing a biological ink material. According to the present invention, the materials used by the preparation method comprise active cells, a cell culture medium, a photoinitiator, modified sodium alginate and antioxidant enzyme; sodium alginate is modified through light curing, such that the modified sodium alginate can retain the original good biocompatibility and the original good hemostasis of the sodium alginate, and can further has double cross-linking property due to the linking of the light-curable group to the molecule chain of the sodium alginate, such that the rapid curing molding can be achieved; the biological material has good biocompatibility with active cells so as to achieve active printing; and the hydrogel formed through the curing molding of the biological ink material has advantages of good mechanical property, healing promoting, bleeding stopping and good biocompatibility.

The invention relates to the field of preparation of lithium battery diaphragms, and discloses a polypropylene diaphragm compounded with kenyaite-silicon dioxide aerogel for a lithium battery. The diaphragm is prepared by compounding a diaphragm base material, namely polypropylene, and a reinforcing material, namely kenyaite-silicon dioxide aerogel micro powder, wherein the mass ratio of the kenyaite-silicon dioxide aerogel micro powder is 1-10%. The polypropylene diaphragm for the lithium battery has excellent liquid absorption performance, thermal stability and anti-puncture resistance without a coating.