23 results about "Hydroxyethyl methyl cellulose" patented technology

The invention relates to the field of positive electrode materials, in particular to a graphene reinforced lithium iron phosphate material and a preparation method and application thereof. According to the positive electrode material, europium ions are doped into lithium iron phosphate, the europium ions are large in radius, a larger migration channel is provided for lithium ions, meanwhile, the binding energy of the lithium ions can be reduced, the surface of the europium-doped lithium iron phosphate is coated with carbonized hydroxyethyl methyl cellulose grafted graphene, the hydroxyethyl methyl cellulose reduces the agglomeration phenomenon of the graphene, and the conductivity of the lithium iron phosphate is improved. After carbonization, a 3D conductive carbon network is jointly formed with graphene, so that the electronic conductivity is enhanced; the positive electrode material has the advantages of long cycle life, high charge-discharge efficiency, high conductivity and high cycle stability, provides a good energy storage basis for batteries, and is suitable for the fields of power batteries and energy storage.

The disclosure provides leather articles and a method for making leather articles comprising a substrate and a coating comprising a cellulose derivative having improved colorfastness to rubbing. The cellulose derivative may be methyl cellulose, ethyl cellulose, ethyl methyl cellulose, carboxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, hydroxyethyl methyl cellulose, hydroxypropyl methyl cellulose, ethyl hydroxyethyl cellulose, cellulose acetate, cellulose triacetate, cellulose propionate, cellulose acetate propionate, cellulose acetate butyrate, microcrystalline cellulose, cellulose nitrate, or cellulose sulfate.

The application discloses a preparation method of an interface treatment agent for a steel structure, and comprises the following steps: adding graphene powder and boron nitride powder into a mixed solution composed of ethanol and water, performing ultrasonic treatment, then centrifuging the mixed solution, collecting supernatant, drying the supernatant, and obtaining graphene nanosheet / boron nitride nanosheet composite material; mixing and stirring polydimethylsiloxane, dibutyltin dilaurate and the graphene nanosheet / boron nitride nanosheet composite material, adding polyacrylate emulsion, and performing stirring treatment to obtain modified polyacrylate emulsion; mixing cement, redispersible latex powder, river sand, defoaming agent, triethanolamine and hydroxyethyl methyl cellulose as dry material components; and taking the modified polyacrylate emulsion as a liquid component. The interface treatment agent can not only effectively improve the interface performance between the steel structure and mortar, but also improve the corrosion resistance and weather resistance of the surface of the steel structure.

The utility model relates to the technical field of hydroxyethyl methyl cellulose ether processing, and discloses stirring equipment for processing hydroxyethyl methyl cellulose ether for building dry-mixed sand, which comprises a stirring equipment main body, a support frame and a discharge pipe are mounted at the bottom end of the stirring equipment main body, a feed pipe is mounted at one end of the stirring equipment main body, and a discharge pipe is mounted at the other end of the stirring equipment main body. A motor limiting frame is installed at the top end of the stirring equipment body, a rotating motor is installed at the top end of the motor limiting frame, a rotating rod is installed at the bottom end of the rotating motor, and three stirring plates are installed on the surface of the rotating rod. According to the stirring equipment for processing the hydroxyethyl methyl cellulose ether for the building dry-mixed sand, through the arrangement of the discharging pipe capable of rapidly adjusting the flow, the conveying efficiency and accurate metering of materials in the conveying process can be ensured, the problems of raw material waste or product performance reduction and the like caused by too large conveying amount are avoided, the production efficiency can be improved, and the production cost is reduced. And the consistency of product quality can be kept.

The application relates to the field of positive electrode materials, in particular to a graphene-reinforced lithium iron phosphate material and a preparation method and application thereof; the positive electrode material is prepared by doping europium ions into lithium iron phosphate; the europium ion radius is large, lithium ions are provided with larger migration channels, and the binding energy of the lithium ions can be reduced; hydroxyethyl methyl cellulose grafted graphene is coated on the surface of the europium-doped lithium iron phosphate; the hydroxyethyl methyl cellulose reduces the graphene agglomeration phenomenon; after carbonization, the hydroxyethyl methyl cellulose and the graphene jointly form a 3D conductive carbon network, and the electronic conductivity is enhanced; the positive electrode material has high cycle life, charging and discharging efficiency, conductivity and cycle stability, provides a good energy storage basis for a battery, and is suitable for power batteries and energy storage fields.

In a hydraulic composition for additive manufacturing which includes (A) at least one water-soluble hydroxyalkyl alkyl cellulose selected from hydroxypropyl methyl cellulose and hydroxyethyl methyl cellulose, (B) a defoamer, (C) cement, (D) water and (E) diutan gum, the water-soluble hydroxyalkyl alkyl cellulose has an alkoxy group degree of substitution of from 1.6 to 2.0 and a 2 wt % aqueous-solution viscosity at 20° C. of from 50 to 1,000 mPa·s and the water is added in an amount of from 25 to 70 parts by weight per 100 parts by weight of the cement. The composition has a good extrudability from a nozzle and a good self-supportability following deposition.

The invention discloses a preparation method of a high-strength seawater desalination reverse osmosis base membrane, which comprises the following steps: preparing a cellulose ether thickening agent with good compatibility with a membrane casting solution; the cellulose ether thickening agent is one of methyl cellulose, hydroxypropyl methyl cellulose, sodium carboxymethyl cellulose, hydroxyethyl cellulose, hydroxyethyl methyl cellulose, carboxymethyl cellulose, ethyl cellulose, benzyl cellulose, cyanoethyl cellulose and benzyl cyanoethyl cellulose, preferably hydroxypropyl methyl cellulose. The cellulose ether thickening agent can regulate and control the viscosity of the membrane casting solution, improve the fluid volume of the polymer and reduce the free movement space of particles, the viscosity of the membrane casting solution system is improved through winding of molecular chains, and the base membrane prepared through the method can be used for preparing a high-strength seawater desalination reverse osmosis membrane.

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.

The invention provides shrinkage-free lightweight aggregate ceramic tile glue as well as a preparation method and application thereof. The ceramic tile glue is prepared from the following raw materials: cement, metakaolin, steel slag micro powder, quartz sand, modified sand, rubber powder, hydroxyethyl methyl cellulose ether, aerogel, wood fibers, a coupling agent, calcium formate, an expanding agent and glass bead powder. Wherein the modified sand is closed-cell sintered modified sand, the particle size is 40-140 meshes, and the closed-cell rate is greater than or equal to 95%; and the coupling agent is a mono alkoxy pyrophosphate type titanate coupling agent. The non-shrinkage lightweight aggregate ceramic tile adhesive prepared by the invention is beneficial to solving the systematic problem of lightweight wall tiling, reducing hollowing and falling accidents, saving the maintenance cost, and assisting the strategy of building weight reduction and green building material upgrading under the national dual-carbon target.

The application relates to the technical field of water-based paint functional additives, in particular to modified hydroxyethyl methyl cellulose ether suitable for water-based paint and a preparation method and application thereof. The modified hydroxyethyl methyl cellulose ether comprises the following components in percentage by weight: 90-95% of surface treatment type hydroxyethyl methyl cellulose ether; 5-10% of admixture; the admixture comprises the following components in parts by weight: 20-35 parts of N-trimethyl chitosan citrate; 30-45 parts of trehalose grafted polyoxyethylene-polyoxypropylene block copolymer; and 20-40 parts of dodecyl hydrophobically modified branched starch. The application overcomes the performance defects of conventional HEMC through a simple and efficient modification mode, makes the comprehensive performance of the HEMC reach the same level of mainstream HEC, meanwhile, the cost advantage of the HEMC is retained, and the large-scale application of the HEMC in a water-based paint system is realized.

The application relates to the technical field of road building and filling materials, and mainly relates to an rubber-plastic micro-powder fluidized solid waste light soil and a preparation method thereof.The rubber-plastic micro-powder fluidized solid waste light soil comprises the following components: (1) solid material; the solid material comprises solid waste cementing material and rubber-plastic micro-powder; the solid waste cementing material comprises the following raw materials according to weight fractions: solid waste base material 40-60 parts, hydraulic cementing material 50-60 parts, additive 0.3-3 parts and hydroxyethyl methyl cellulose 0.03-0.05 parts; the volume content of the rubber-plastic micro-powder in the solid material is 10%-70%; (2) water; the weight ratio of the water to the solid material is 0.5-0.7:1.The prepared rubber-plastic micro-powder fluidized solid waste light soil can realize comprehensive utilization and recycling of the solid waste base material and rubber-plastic material, and has good compression resistance and fatigue resistance after hardening, and has good comprehensive performance, and can effectively meet the requirements of road building and filling as a light material.

Frother composition and method of concentrating minerals by flotation. The method comprises providing an aqueous slurry formed by the minerals in finely divided form in water; optionally adding a collector to render the mineral hydrophobic; subjecting the slurry thus obtained to flotation in a flotation cell aerated to form bubbles; and recovering the hydrophobic mineral particles together with the froth to form a concentrate. In the method, an amphiphilic cellulose derivative, is used as such or in combination with a second surfactant as a frother to promote the formation of a stable froth on top of the slurry in the flotation cell. Hydroxypropyl methyl cellulose or hydroxyethyl methyl cellulose are combined with at least one non-ionic organic surfactant or polyglycol esters, for providing a frother. The novel cellulose-based frothers can be used in mineral processing plants to allow for processing of larger quantities of minerals without significant modification of existing facilities.

The invention discloses cellulose ether with controllable release of dissolution viscosity as well as a preparation method and application of the cellulose ether. Cellulose ether with controllable release of dissolution viscosity is hydroxypropyl hydroxyethyl methyl cellulose cross-linked by a cross-linking agent. The cellulose ether disclosed by the invention has the characteristic of controllable dissolution, the viscosity delay time and the viscosity rising speed can be accurately regulated and controlled, and the cellulose ether has strong resistance to the change of the pH value of water.

The invention relates to the technical field of building walls, and particularly discloses a high-performance self-insulation outer wall material and a preparation method thereof. A high-performance self-heat-preservation outer wall material comprises an inner acanthus, an outer acanthus and a heat preservation layer, pouring materials of the inner acanthus and the outer acanthus are anti-shrinkage mixtures, and the anti-shrinkage mixtures comprise, by weight, 20-30 parts of ceramsite, 20-30 parts of cement, 10-20 parts of fine aggregate, 0.3-0.5 part of an air entraining agent, 0.5-1 part of a water reducing agent and 1-3 parts of hydroxyethyl-methyl cellulose ether. 1-3 parts of a mineral admixture and 3-5 parts of a composite expanding agent; the hydroxyethyl-methyl cellulose ether can enhance the overall strength of the interior of the mixture and reduce the water absorption rate of the mixture, and meanwhile, the ceramsite, the fine aggregate and the mineral admixture are compounded and combined with the composite expanding agent, so that the overall compressive strength and impact resistance of the inner acanthus and outer acanthus pouring material are improved.

In a hydraulic composition for additive manufacturing which includes (A) at least one water-soluble hydroxyalkyl alkyl cellulose selected from hydroxypropyl methyl cellulose and hydroxyethyl methyl cellulose, (B) a defoamer, (C) cement, (D) water and (E) diutan gum, the water-soluble hydroxyalkyl alkyl cellulose has an alkoxy group degree of substitution of from 1.6 to 2.0 and a 2 wt % aqueous-solution viscosity at 20° C. of from 50 to 1,000 mPa·s and the water is added in an amount of from 25 to 70 parts by weight per 100 parts by weight of the cement. The composition has a good extrudability from a nozzle and a good self-supportability following deposition.

The application relates to the technical field of building materials, and particularly discloses an asbestos-free interior wall decorative coating as well as a preparation method and application thereof. The asbestos-free interior wall decorative coating comprises the following components in parts by weight: 1200-1300 mesh superfine heavy calcium powder 212-240 parts, 700-800 mesh heavy calcium powder 438-460 parts, nano titanium dioxide 43-56 parts, latex 10-14 parts, calcium hydroxide 135-165 parts, white bamboo charcoal 87-108 parts, HEMC hydroxyethyl methyl cellulose 5-9 parts, sodium polyacrylate 1-3 parts, silicon dioxide 0.6-1.4 parts, aerogel 1.4-2.6 parts and water 380-400 parts. The application further discloses a preparation method of the coating. The formula raw materials provided by the application can be used to obtain the coating which is sterilized and mildew-proof, and has strong anti-cracking property.

The present invention discloses an oyster shell hydrogen powder composition with pH buffering function. The composition is composed of the following components by mass percentage: 40% to 50% oyster shell hydrogen powder, 20% to 25% starch, 10% to 15% citric acid, and 15% to 20% hydroxyethyl methylcellulose, with the sum of the percentages of the above components being 100%. The present invention also discloses a method for preparing the above oyster shell hydrogen powder composition. The composition and preparation method disclosed in the present invention solve the problem that existing products containing oyster shell hydrogen powder, when releasing H2, simultaneously produce Ca(OH)2, which is strongly alkaline and can cause significant irritation and damage to the gastrointestinal mucosa.

The invention relates to the technical field of building materials, and discloses a novel anti-dispersion grouting material capable of adjusting setting time under a flowing water condition. The invention relates to a quick hardening iron aluminate cement mortar which is prepared from the following raw materials: quick hardening iron aluminate cement, silica fume, superfine fly ash, a modified inorganic thixotropic stabilizer, a composite setting time regulator, polycarboxylate superplasticizer powder, hydroxyethyl methyl cellulose, an organic silicon defoaming agent and the like. The dispersion resistance of the slurry in a flowing water environment is improved; the hydration rate is regulated by utilizing the synergistic effect of the boric acid powder and the trisodium citrate dehydrate powder, so that the technical problem that the setting time of the quick-hardening cement is difficult to control is solved; and in cooperation with the micro-grading filling effect of the mineral admixture, the high fluidity, high flowing water retention rate and high early strength of the slurry under the low water-binder ratio are achieved, and the slurry is suitable for grouting reinforcement in the complex underground flowing water environment.

The application relates to the technical field of oral solid preparations, in particular to a high-bioavailability coenzyme Q10 tablet and a preparation method thereof. The coenzyme Q10 tablet of the application comprises an active ingredient coenzyme Q10, a filler, a binder, a disintegrant, a lubricant and a high-molecular material; compared with the prior art, the coenzyme Q10 tablet prepared by mixing hydroxyethyl methyl cellulose and hydroxypropyl methyl cellulose succinate according to a certain mass ratio as a high-molecular carrier material has the advantages that the coenzyme Q10 tablet is rapidly dissolved in vitro, the drug stability can be improved, the coenzyme Q10 is rapidly absorbed in the body after oral administration, the oral bioavailability of the coenzyme Q10 is greatly improved, the preparation process is simple, the reproducibility is good, and the preparation is suitable for industrial production.

The invention relates to the technical field of high polymer materials, in particular to modified hydroxyethyl methyl cellulose ether as well as a preparation method and application thereof. The modified hydroxyethyl methyl cellulose ether comprises the following components in percentage by weight: 70-85% of hydroxyethyl methyl cellulose ether; 10-20% of starch ether; 0.5-2% of a thickening agent; 0.2%-0.5% of an air entraining agent; 0.3-1% of water-absorbent resin; 0.5%-2.5% of a water reducing agent; 0.05 to 0.15% of polyether amine; and 0.2 to 0.6 percent of phosphonate modified polyethylene glycol. The modified hydroxyethyl methyl cellulose ether provided by the invention is applied to a C2 high-performance ceramic tile adhesive, so that the C2 ceramic tile adhesive meets the harsh requirements of paving large and low-water-absorption ceramic tiles (such as vitrified tiles, marbles and artificial stones) in modern buildings on an adhesive material.

The invention discloses an imipenem and cilastatin sodium injection preparation and a preparation method thereof, and relates to the technical field of pharmaceutical preparations, and the preparation method comprises the following steps: dissolving imipenem and cilastatin sodium in a buffer solution, and adding serine and tea polyphenol to completely dissolve the imipenem and cilastatin sodium to obtain an imipenem and cilastatin sodium mixed solution; the preparation method comprises the following steps: mixing hydroxyethyl methyl cellulose, glutaric anhydride, 4-dimethylaminopyridine and an ethanol solution, and reacting to obtain a solution A; mixing phenylalanine, glycine, sorbitan fatty acid ester and nano calcium carbonate, and reacting to obtain a solution B; mixing the solution A and the solution B, adding the mixed solution into an imipenem and cilastatin sodium mixed solution, uniformly stirring and mixing, cooling and crystallizing, filtering to obtain imipenem and cilastatin sodium, and freezing and drying to obtain the imipenem and cilastatin sodium injection preparation. The imipenem and cilastatin sodium injection preparation prepared by the preparation method is high in stability, purity and bioavailability.

The invention relates to an aqueous dispersion comprising the following components: (a) 25 to 60 wt. % of 3-iodo-2-propynyl butyl carbamate (IPBC), (b) 0.05 to 5 wt. % of at least one compound selected from the group consisting of methyl cellulose, hydroxyethyl cellulose, hydrophobically modified hydroxyethyl cellulose, hydroxypropyl methyl cellulose, hydroxypropyl cellulose, hydroxyethyl methyl cellulose and carboxymethyl cellulose, or mixtures of two or more of these, (c) 1 to 10 wt. % of at least one block copolymer based on ethylene oxide and propylene oxide, having a numerically defined average molecular weight of between 1,000 g / mol and 15,000 g / mol, (d) 0.1 to 10 wt. % of at least one thickener and / or anti-settling agent, and (e) up to 100 wt. % of water, in each case based on the total aqueous dispersion. The invention further relates to the use of this dispersion for the protection of technical materials from attack and / or destruction by microorganisms.

The invention belongs to the technical field of preparation of cellulose ether, and particularly relates to a preparation method of temperature-resistant and salt-resistant high-substituted hydroxyethyl methyl cellulose ether, which comprises the following steps: S1, contacting at least one cellulose material with at least one alkalization reagent to form an alkalized cellulose material; s2, contacting the alkalized cellulose material obtained in the step S1 with chloromethane and ethylene oxide, and carrying out a reaction to obtain an initial reaction material; s3, enabling the primary reaction material in the step S2 to be in contact with ethylene oxide and lewis acid, and continuously reacting to obtain a final reaction material; and S4, carrying out reduced pressure distillation to remove the lewis acid in the final reaction material, and filtering and washing the product to obtain the HEMC gel material. According to the preparation method disclosed by the invention, firstly, the high substitution degree of the HEMC is realized through step-by-step etherification and catalytic ring opening, so that the temperature resistance and salt resistance of the HEMC are enhanced.