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4903 results about "Organosolv" patented technology

In industrial paper-making processes, organosolv is a pulping technique that uses an organic solvent to solubilise lignin and hemicellulose. It has been considered in the context of both pulp and paper manufacture and biorefining for subsequent conversion of cellulose to fuel ethanol. The process was invented by Theodor Kleinert in 1968 as an environmentally benign alternative to kraft pulping.

A kind of non-aqueous electrolytic solution for lithium secondary battery

The invention relates to a non-aqueous electrolytic solution used for lithium secondary batteries, in particular to an electrolytic solution capable of improving the high-voltage cycle performance of lithium batteries and the storage performance of the electrolytic solution. The non-aqueous electrolytic solution disclosed by the invention contains 0.01-2% by weight of antioxidant based on the total weight of the electrolytic solution, and due to the incorporation of the additives, the storage stability of the electrolytic solution is obviously improved. The non-aqueous electrolytic solution also contains lithium salt, a non-aqueous organic solvent and also contains the following components in percentage by total weight of the electrolytic solution of 0.5-7 percent of film-forming additives, 0-15 percent of flame-retardant additives, 2-10 percent of overcharge protection additives, 0.01-0.02 percent of a stabilizing agent and 0.01-1 percent of a wetting agent. According to the non-aqueous electrolytic solution provided by the invention, batteries can stably work under the high voltage of 4.3V or above, due to the synergic action of the incorporated additives with various functions, the high-capacity lithium-ion batteries can bring high specific energy into full play and have outstanding safety and high-temperature performances and cycle life.
Owner:JIUJIANG TINCI ADVANCED MATERIALS CO LTD

In-situ composite silicon-based multibasic oxide oxide aerogel material and preparation method thereof

The invention relates to an in-situ composite silicon-based multibasic oxide oxide aerogel material and its preparation method, especially to a multibasic oxide oxide aerogel material which is prepared by the following steps: using soluble glass as a silicon source, mixing metallic oxide corresponding water-soluble metal salt, adding acid or alkali to adjust pH value of the system so as to form multibasic oxide sol; mixing the multibasic oxide sol with a water-soluble organic solvent, filtering to remove produced precipitate so as to obtain salt-free multibasic oxide sol, carrying out a sol-gel method, aging, modifying and drying. By a mature silica aerogel technology, the multibasic oxide oxide aerogel material is prepared by in-situ polymerization of other oxide components which are not easy to separately prepare aerogel. In addition, the multibasic oxide oxide aerogel material has excellent properties, such as high temperature stability, high activity, magnetic property and the like, none of which are present in single-component silica aerogel. The product is widely applied in fields of high temperature insulation, sound insulation, catalysts, catalytic carriers, battery electrodes, electromagnetism, resistance, gas sensitivity, humidity sensitivity, luminescent materials and the like.
Owner:金承黎

High-strength room-temperature self-repairing polyurethane elastomer based on multiple dynamic reversible effects as well as preparation and application of high-strength room-temperature self-repairing polyurethane elastomer

The invention belongs to the technical field of self-repairing elastomer materials, and discloses a high-strength room-temperature self-repairing polyurethane elastomer based on multiple dynamic reversible effects as well as preparation and application thereof. A preparation method comprises the following steps: 1) reacting a dihydric alcohol with a diisocyanate under the action of a catalyst to obtain a prepolymer; wherein the dihydric alcohol is a mixture of more than one from a polyether glycol and a polysiloxane glycol; 2) reacting a dicarboxylic acid chain extender with the prepolymer toobtain an oligomer; adding a diamine chain extender, continuously reacting, and carrying out subsequent treatment to obtain polyurethane; wherein the dicarboxylic acid chain extender and the diamine chain extender are collectively called as chain extenders, and the chain extenders contain disulfide bonds and pyridine groups; 3) in an organic solvent, reacting polyurethane with a metal salt cross-linking agent, and removing the solvent to obtain the high-strength room-temperature self-repairing polyurethane elastomer. The preparation method is simple and mild in condition, and the prepared polyurethane elastomer is excellent in mechanical property and high in self-repairing efficiency and is applied to a flexible substrate materials, wearable equipment and intelligent protective coating.
Owner:SOUTH CHINA UNIV OF TECH

Preparation method of solvent-free environment-friendly polyurethane automobile leather

The invention provides a preparation method of solvent-free environment-friendly polyurethane automobile leather. The automobile leather comprises a surface layer and a foaming layer, wherein both the surface layer and the foaming layer are made of double-component solvent-free polyurethane; each of solvent-free environment-friendly polyurethane surface layer rein and solvent-free environment-friendly polyurethane foaming layer resin respectively used in the surface layer and the foaming layer is composed of a solvent hydroxyl mixture component A and an isocyanate component B. The specific preparation method of the automobile leather comprises the following steps: blade coating a shell fabric, drying the shell fabric, blade coating the foaming layer resin, adhering base cloth when the foaming layer resin is half-dry, curing and rolling. The automobile leather is prepared from the solvent-free environment-friendly polyurethane resin by one-step molding on a dry-method production line; the preparation method gets rid of a wet-method process flow in the traditional production process of polyurethane automobile leather and the production procedure is shortened for one half; no organic solvent is discharged, and the production process and finished products are friendly to the environment.
Owner:XUCHUAN CHEM SUZHOU

Electrolyte for Li-S battery, preparation method thereof, and Li-S battery containing same

The invention discloses an electrolyte for a Li-S battery. The electrolyte mainly comprises electrolyte salts and an organic solvent, wherein the electrolyte salts contain lithium polysulfide, and the molecular formula of the lithium polysulfide is Li2Sn. A preparation method of the electrolyte comprises the following steps of adding lithium metal or Li2Sn and elemental sulfur into the organic solvent according to a molar ratio and carrying out reaction at room temperature and under the protection of an inert atmosphere to generate the electrolyte, wherein lithium salts, shuttle inhibitors and the like can be selectively added to the electrolyte. The invention further discloses a Li-S battery containing the electrolyte; a negative active material is the lithium metal or lithium-containing alloy; a positive active material is at least one of the elemental sulfur, organic sulfides and carbon-sulfur polymer, and the positive pole is composed of the positive active material, a conductive agent and a binding agent which are mixed in a certain mass ratio; and the dosage of the electrolyte is about 0.04 mL relative to every milligram of sulfur. The Li-S battery disclosed by the invention has the advantages that the sources of raw materials are broad, the energy density of the Li-S battery can be increased, and the cycle life of the Li-S battery can be prolonged.
Owner:NAT UNIV OF DEFENSE TECH

Graphite type carbon nitride-metal organic frame composite photocatalyst as well as preparation method and application of graphite type carbon nitride-metal organic frame composite photocatalyst

The invention discloses a graphite type carbon nitride-metal organic frame composite photocatalyst as well as a preparation method and application of the graphite type carbon nitride-metal organic frame composite photocatalyst. Graphite type carbon nitride acts as a carrier of the graphite type carbon nitride-metal organic frame composite photocatalyst; metal organic framework particles freely grow on the surface of graphite type carbon nitride, and the surfaces of the metal organic framework particles are loaded with carbon nitride nano sheets. The preparation method comprises the following steps: carrying out ultrasonic dispersion on graphite type carbon nitride into dimethylformamide so as to obtain a graphite type carbon nitride dispersion solution; stirring and mixing a carbon nitride dispersion solution, tetrabutyl titanate, methyl alcohol and an organic solvent so as to obtain a mixed solution; heating and reacting the mixed solution in a seal environment so as to obtain the graphite type carbon nitride-metal organic frame composite photocatalyst. The graphite type carbon nitride-metal organic frame composite photocatalyst can remove dye in waste water, and has the advantages of simplicity, high efficiency, environment friendliness, economic property, environment protection and the like.
Owner:HUNAN UNIV

Preparation method of tissue repair material

The invention relates to a preparation method of a tissue repair material. The preparation method comprises the following steps: carrying out pre-treatment; vibrating in an organic solvent to degrease; deactivating a virus with an ethanol solution; removing cells by high and low osmotic solutions; swelling in an acidic or alkaline liquid; and quickly lyophilizing and sterilizing. The thickness of the tissue repair material is increased by 2-4 times, and the material is loose and porous, small in change of mechanical property and degradation property and good in cell removal effect and has relatively high biosafety and biocompatibility. Due to the structural characteristics of proper thickness and looseness and porosity, the material is suitable for damage repair for filling damaged parts required by repair such as cartilage injury, skin and soft tissue defect, gingival recession and the like. Animal experiments verify that the repaired region after eight weeks has no depressed phenomena and is fully replaced by regenerated tissues. Moreover, the regenerated tissue and autologous tissue are healed well and are free of separating phenomenon, which verifies that the material can provide sufficient three-dimensional space for cell proliferation and crawl, so that the repaired region has good integration degree and filling degree, thereby realizing tissue repair and regeneration.
Owner:SHAANXI BIO REGENERATIVE MEDICINE CO LTD

Preparation method of graphene-like MoS2/graphene combined electrode of lithium ion battery

ActiveCN102683647AAdjust the average number of layersGood dispersionCell electrodesActive agentOrganosolv
The invention relates to a preparation method of a graphene-like MoS2/graphene combined electrode of a lithium ion battery. The preparation method comprises the following steps of: dispersing oxidized graphene ultrasonically in deionized water, stirring, and firstly adding a cationic surfactant; then adding L-aminothiopropionic acid and sodium molybdate sequentially; transferring the obtained mixed dispersing system to a hydrothermal reaction kettle, and reacting at 220-250 DEG C for 24 hours, then cooling naturally, collecting solid products centrifugally, washing with the deionized water, drying, and carrying out heat treatment in a nitrogen/hydrogen mixed atmosphere, thereby obtaining a graphene-like MoS2 and graphene combined nano material of single layer or 2-4 layers on average; and mixing the graphene-like MoS2 and graphene combined nano material and acetylene black as well as polyvinylidene fluoride into paste, and coating the paste on a copper foil and rolling, thereby obtaining the electrode. The preparation method provided by the invention is simple in process, and organic solvents are not required to be consumed; the lithium ion battery combined electrode has the advantages of high electrochemistry lithium storage specific capacity, stable circulating performance, and good high-multiplying-power charging and discharging performance.
Owner:ZHEJIANG UNIV

Preparation method of acrylic ester oligomer modified aqueous polyurethane pressure-sensitive adhesive

ActiveCN102020967ATo achieve mutual toleranceReduce usagePolyureas/polyurethane adhesivesPolymer scienceEmulsion
The invention relates to the technical field of preparation of aqueous adhesive and discloses a preparation method of acrylic ester oligomer chemical modified aqueous polyurethane pressure-sensitive adhesive. The preparation method comprises the following steps of: making hydroxyl monomers, a hydrophilic chain extender and polyisocyanate which are mainly used as man raw materials react to generate a prepolymer; adding an acrylic ester oligomer and making the acrylic ester oligomer and polyurethane prepolymer properly grafted; carrying out multiple modification through a cross-linking agent; and finally, carrying out water emulsification to obtain the acrylic ester oligomer modified aqueous polyurethane pressure-sensitive adhesive. In the invention, the acrylic ester oligomer is introducedinto the polyurethane system, and good characteristics of aqueous polyurethane and polyacrylic ester are integrated. Compared with solvent-based pressure-sensitive adhesive, water is used as a solvent in the invention, the usage amount of organic solvents is small so that the requirement of clean production processes are met, and the low temperature resistance is greatly improved. The synthesizedacrylic ester oligomer chemical modified aqueous polyurethane pressure-sensitive adhesive has more excellent mechanical property, strong bonding capacity, good film forming property and stable emulsion.
Owner:溧阳常大技术转移中心有限公司

Preparation method of epoxy resin system for nanometer modified carbon fiber prepreg

The invention discloses a preparation method of an epoxy resin system for a nanometer modified carbon fiber prepreg. The preparation method comprises the following steps: uniformly mixing a nanometer material with solid particles including a curing agent, an accelerant and the like in liquid bis-phenol A epoxy resin by a grinding method of a three-roller grinder to prepare a mixture A; and preparing the epoxy resin system for the carbon fiber prepreg by using the mixture A as the material to melt and co-extrude with solid bis-phenol A epoxy resin under 40 DEG C-100 DEG C. Firstly, the nanometer material is uniformly pre-mixed in the liquid epoxy resin by the grinding method of the three-roller grinder, and then secondary dispersion is carried out. According to the preparation method of the epoxy resin system for the nanometer modified carbon fiber prepreg disclosed by the invention, not only can the use of an volatile organic solvent be avoided, but also the better dispersion effect of the nanometer material in an epoxy resin base body can be achieved, and therefore, the process is relatively environment-friendly, and the harms to the body of a worker are smaller. Moreover, the nanometer material is good in dispersion effect, simple in process, high in efficiency and convenient for being applied to modifying and preparing the epoxy resin system for the carbon fiber prepreg in a large scale.
Owner:LIANYUNGANG SHENYING CARBON BIKE CO LTD

Process for preparing cross-linked sodium hyaluronate microspheres capable of being adopted as emboliaztion agent by adopting sodium hyaluronate as raw material

The present invention provides a process for preparing cross-linked sodium hyaluronate microspheres capable of being adopted as an emboliaztion agent by adopting sodium hyaluronate as a raw material. The process comprises the following steps: preparing a sodium hyaluronate alkaline solution gel with a concentration of 10-30% g/ml; adding the sodium hyaluronate alkaline solution gel to an emulsifier-containing oil phase, and carrying out high speed emulsification through a shearing machine, wherein an emulsification speed is 500-2000 rpm, and a time is 10-20 min; adding a certain amount of a cross-linking agent, stirring for 4-6 h at a room temperature, carrying out a cross-linking reaction, and standing overnight after completing the reaction, wherein a mass percentage of the cross-linking agent in the oil phase is 0.2-2%; and adopting a water-soluble organic solvent to wash to remove the oil phase remained on the surface of the microspheres, and finally drying to obtain the cross-linked sodium hyaluronate microspheres. According to the present invention, the preparation process is simple; and the size of the obtained microspheres is suitable for routine blood vessel emboliaztion, and the obtained microspheres have characteristics of controllable particle size, good microsphere shape, easy screening, elasticity, expandibility, no toxic-side effect on human body, good biocompatibility, good biodegradability, and ensured clinical safety.
Owner:HANGZHOU SINGCLEAN MEDICAL PROD

Extraction method for high purity rubusoside

The present invention discloses an extraction method for high purity rubusoside. The extraction method comprises the following steps: (1) pre-treatment: removing impurities from a dried sweet tea raw material, and smashing, sieving and obtaining the dried sweet tea raw material to sweet tea raw material powder; (2) microwave counter-current extraction: performing microwave counter-current extraction on the sweet tea raw material, extruding extracted residues, and mixing and filtering an extruding liquid and a sweet tea feed liquid to obtain an extracting liquid; (3) performing centrifugation to obtain centrifugate; (4) macroporous resin adsorptive separation: adjusting the pH value of the centrifugate to 10.0-11.0, passing the centrifugate through macroporous resin for adsorption, and after leaving the centrifugate to stand, performing water-washing and eluting to collect a target eluent; (5) performing ultra-filtration to obtain ultrafiltrate; (6) performing concentration to obtain a concentrate; and (7) crystallization and recrystallization: adding an organic solvent into the concentrate for crystallization, then performing recrystallization and drying to obtain a rubusoside product. According to the rubusoside product obtained by the method provided by the invention, the purity is greater than or equal to 99%, and the yield is greater than or equal to 5.35%. The extraction method provided by the present invention is simple and convenient in process, short in period, low in energy consumption and production cost and can be used for continuous extraction, and is suitable for continuous production in a factory.
Owner:HUNAN HUACHENG BIOTECH
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