57results about How to "Increase surface charge" patented technology

The invention provides ultrafine spheroidized rare earth polishing powder and a process for making the same. The process comprises the following steps that: one of or the mixture of ammonia water, ammonium bicarbonate and ammonium carbonate is used as precipitant; ammonium salt and fluoride ions are added into precipitated slurry to adjust the ionic strength in mother liquid, so as to increase the surface electrical property of solid particles in the slurry; after high temperature aging, the ultrafine rare earth polishing powder with good dispersity and high spheroidization degree can be obtained by filtering the slurry, drying, burning, ball-milling and sieving filter cakes. The average particle size of the obtained polishing powder is between 0.02 mu m and 2.0 mu m, wherein the specific surface area BET is more than 0 and less than 10 m<2>/g, and the powder is in a well-dispersed spherical shape. The powder is used for polishing optical glass, crystal, display screens, etc., strong in cutting force, few in scratch and long in service time.

The invention discloses a photosensitive microcapsule used for photodynamic therapy and a preparation method thereof, belonging to the technical field of photosensitive polymer thin film materials. The photosensitive microcapsule is prepared by the following steps: firstly, preparing photosensitive polymer materials of photosensitizer molecule graft polymer, and then adopting the layer self assembly technology, assembling polyelectrolyte materials with opposite charges on a microballoon template, and preparing a hollow capsule assembled by a plurality of capsule walls, wherein materials of the capsule walls include natural polymer glycan (CHI) or glucan directly grafted with photosensitizer by chemical bonds. The photosensitive microcapsule has good biocompatibility, fixes photosensitive molecules, can kill cancer cells effectively, can be applied to (Photodynamic Therapy) PDT, and is good in water dispersion and uniform in particle size, high in single-state oxygen content yield under the illumination of beams with specific wavelength, simple in process and easy in operation.

The invention belongs to the environmental engineering field, and relates to the treatment of water and wastewater, the preparation of flocculant, and the like. The invention discloses a preparation method for organic-inorganic composite flocculant. The method takes sodium silicate as a raw material for preparing polysilicate inorganic polymer flocculant and mixes polysilicate solution and cationic polyacrylamide for copolymerization so as to obtain the composite flocculant. The prepared composite flocculant can exert the synergic action of the polysilicate solution and the cationic polyacrylamide. The turbidity removal rate for the composite flocculant kaolin simulation water sample reaches 90.81 percent; the turbidity removal rate by using the polysilicate flocculant is only 45.72 percent; the turbidity removal rate by using the positive polyacrylamide ion is only 56.34 percent; however, the turbidity removal rate by using the polysilicate flocculant and the positive polyacrylamide ion simutanously is 74.62 percent.

The invention discloses a selenium sulfide ultrafine powder and a preparing method thereof, and belongs to the field of washing products. The selenium sulfide ultrafine powder and the preparing method solve the problem that the production time of selenium sulfide ultrafine powder which is prepared through medium ball milling micronization and serves as a lotion is long, and the quality problems that selenium sulfide is large in particle, uneven in dispersion and instable. The particle size of the selenium sulfide ultrafine powder is 1-50 microns. The method includes the following steps that 1, dry selenium sulfide powder, purified water, medicine-level titanium dioxide and medicine-level glycerin are mixed to be even, and then citric acid is added to adjust the pH value to range from 3.5 to 4.5; 2, the mixture is arranged in a grinding-type ultrafine grinder to be ground and smashed, and the selenium sulfide ultrafine powder is obtained. The selenium sulfide ultrafine powder can be applied to daily chemical products such as lotions, liquid shampoo and hair conditioners.

The invention discloses an autoclaved ceramic powder aerated concrete self-insulating block. The self-insulating block is prepared from the following raw materials in parts by weight: 45-66 parts of ceramic slag powder, 10-15 parts of quick lime, 6-10 parts of cement, 3-5 parts of gypsum, 2-5 parts of aluminum powder, 3-6 parts of ferrosilicon powder, 15-25 parts of waste slurry, 0.3-0.6 part of an additive and 50-120 parts of water. An ultrafine powder slurry aeration molding method is established, the bottleneck of an ultrafine powder application problem in the field of aerated concrete thatthe size of a silicon material is always considered to not be less than 180-200 meshes can be overcome by utilizing multiple additives, and the problems of fine size of ceramic slag powder, large specific surface area, high water absorption rate, dispersing difficulty, large viscosity and poor slurry pouring stability can be effectively solved.

Described herein are nanoparticles which are largely made of (e.g., 90 wt. %) hydrophobic drugs and are stabilized by water soluble dyes. The nanoparticles can range in size from 30 nm to 150 nm and have highly negative surface charge (e.g., −55 mV). These nanoparticles are highly soluble in water, stable for days in PBS buffer and can be easily lyophilzed and reconstituted in water. Using quantitative self-assembly prediction calculations, topochemical molecular descriptors were identified and validated as highly predictive indicators of nano-assembly, nanoparticle size, and drug loading. The resulting nanoparticles selectively targeted kinase inhibitors to caveolin-1-expressing human colon cancer and autochthonous liver cancer models to yield striking therapeutic effects while avoiding pERK inhibition in healthy skin. The nanoparticles exhibited remarkable anti-tumor efficacy in vitro and in vivo in models of hepatocellular carcinoma.

The invention relates to a preparation method of cellulose nano-fibril aerogel suitable for a layer-by-layer self-assembly process. The preparation method comprises the following steps: 1) dispersingcellulose nano-fibrils in water to obtain a dispersion liquid; 2) diluting an aqueous polyethyleneimine solution until a concentration is 15%; 3) mixing the cellulose nano-fibril dispersion liquid obtained in the step 1) with the aqueous polyethyleneimine solution obtained in the step 2) to uniformly disperse the cellulose nano-fibril dispersion liquid, and then carrying out standing to obtain a cellulose nano-fibril hydrogel with a stable structure; and 4) carrying out gradient pre-freezing on the cellulose nano-fibril hydrogel obtained in the step (3), and then carrying out freeze drying toobtain the cellulose nano-fibril aerogel. The aerogel prepared by the preparation method disclosed by the invention has high wet strength, and high shape stability, compressibility and restorability in water.

The present invention discloses a novel adjuvant vaccine associated with HPV, and a preparation method thereof, wherein specifically the novel adjuvant is PLGA-CaP composite particles, and the adjuvant vaccine PLGA-CaP composite particles can produce in vivo immune response, and belongs to the developed efficient HPV protein vaccine composition.

The invention belongs to the field of fertilizer production and provides a preparation method and the application of a nano goethite-amino acid compound leaf fertilizer. The nano goethite-amino acid compound leaf fertilizer is prepared from nano goethite, amino acid hydrolysate and deionized water, wherein the concentration of the goethite is 1g/L. The preparation process of the nano goethite-amino acid compound leaf fertilizer comprises the following steps: (1) preparing the nano goethite; (2) preparing the amino acid hydrolysate; and (3) obtaining the nano goethite-amino acid compound leaf fertilizer. The nano goethite in the nano goethite-amino acid compound leaf fertilizer is capable of effectively adhering to the surfaces of plant leaves, and therefore, the problems of low utilization rate and non-obvious growth promoting effect due to short retention time period and poor stability of the leaf fertilizer on the plant leaves are solved, and furthermore, the acting time of the amino acid compound leaf fertilizer is effectively prolonged, the utilization rate and the application effect of the leaf fertilizer are increased and the growth of tomato plants is greatly promoted.

The invention provides an anticorrosive coating. The anticorrosive coating is composed of a component A and a component B, wherein based on 100% of the total mass of the component A, the component A comprises the following components in percentage by mass: 40-60% of graphene modified magnesium powder, 20-40% of epoxy resin, 0.6-3% of a dispersing agent, 2-10% of a filler, 0.5-5% of an anti-settling agent and 5-20% of an organic solvent; and based on 100% of the total mass of the component B, the component B comprises the following components in percentage by mass: 50-70% of a curing agent, 20-40% of an organic solvent, 1-10% of a coupling agent and 0.5-5% of a curing accelerator. The anticorrosive coating provided by the invention has strong adhesion to a base material, is not easy to falloff from the surface of a base material, and plays a good role in protecting the base material; and the coating has good salt water resistance, water resistance, salt mist resistance and acid and alkali resistance, and achieves a good anti-corrosion effect.

The invention discloses a stable aprepitant emulsion for injection. The aprepitant emulsion comprises aprepitant, an emulsifier, a co-emulsifier, injection oil, a tension adjusting agent, a pH value adjusting agent and injection water, wherein the weight ratio of the emulsifier to the aprepitant is (12-1)-(14:1); the content of the emulsifier is 9-10wt%; and the pH value is within 8.0-9.5. The medicine preparation is a stable oil-in-water emulsion, has a small particle size and good physical stability, and is applicable to non-oral treatment on patients suffering from high/medium vomiting cancer chemotherapy.

A high voltage edge termination structure for a power semiconductor device is provided. The high voltage edge termination structure comprises a semiconductor body of a first conductive type, a JTE region of a second conductive type, a heavily doped channel stop region of the first conductive type, and a plurality of field plates. The JTE region is formed in the semiconductor body, wherein the JTE region is adjacent to an active region of the power semiconductor device. The heavily doped channel stop region is formed in the semiconductor body, wherein the heavily doped channel stop region is spaced apart from the JTE region. The plurality of field plates is formed on the JTE region.

The invention provides an improved high-speed cigarette filter tipping adhesive. The adhesive is prepared from materials in parts by weight as follows: 80-81 parts of modified VAE (vinyl acetate-ethylene) emulsion, 6-7 parts of rosin glycerin ester, 3-4 parts of polyvinyl alcohol, 6-7 parts of water, 1-3 parts of an emulsifier and 10-15 parts of a compound plasticizer; the emulsifier contains OP-10 and MS-1, and a ratio of OP-10 to MS-1 in parts by weight is 4:1; the compound plasticizer contains bis(2-ethylhexyl)phthalate and dibutyl phthalate, and a ratio of bis(2-ethylhexyl)phthalate to dibutyl phthalate in parts by weight is 1:1; the modified VAE emulsion is prepared from materials in parts by weight as follows: 62-63 parts of VAE, 8-9 parts of polyvinyl alcohol, 25-28 parts of vinyl acetate, 1-3 parts of acrylic acid, 1-2 parts of ammonium persulfate and 1-2 parts of potassium persulfate. According to the improved high-speed cigarette filter tipping adhesive and a preparation method thereof, viscosity and storage stability are improved, and rejection rate of filter tipped cigarettes is reduced.

The invention discloses anti-bending leather. The anti-bending leather comprises the following leather processing technology steps that 1, a preparation stage is carried out, specifically, soft skin materials are carefully selected, impurities are removed, and degreasing, softening and pickling are carried out; and 2, a tanning stage is carried out, specifically, the structure of the leather is changed through a chemical method, wherein the main procedures comprise pre-tanning, main tanning and retanning. According to the anti-bending leather, multiple soaking and impurity removal are adoptedin the preparation stage, so that the permeability of pores of the leather is conveniently improved, and the smoothness of the inner surfaces of the pores is improved; the leather is repeatedly processed through multiple layers of pre-tanning, main tanning and retanning, and collagenous fibers of animal skin are changed in structure through the chemical method, so that the animal skin is changed into the leather from the skin, the softness of the leather is improved, the fullness is improved, the part difference is reduced, the surface charge of the leather is changed, and the dyeing uniformity and adhesion performance are promoted; and through adding of sodium bicarbonate, resin and tannin extract and scientific proportion of the multiple materials, the surface of the leather is more delicate in touch, oily, antioxidant and better in bending-resistant effect.

The invention relates to a method for improving the dispersion stability of silicon carbide powder in a water system. The method includes: dispersing silicon carbide powder in a water system to prepare a slurry, adding a sucrose ester surfactant solution to make the mass of sucrose ester account for 5%-30% of the mass of silicon carbide, and mixing the substances evenly to obtain a mixed solution,and adjusting the pH value of the mixed solution to 8-12. In the sucrose ester surfactant solution, sucrose ester serves as the solvent, and ethanol serves as the solvent. The method has the characteristics of simple operation, non-toxic and harmless dispersant, energy-saving and environmental protection, and low cost. The prepared silicon carbide water system has good silicon carbide dispersibility and high stability, and can be used as a silicon carbide slurry to be prepared into silicon carbide ceramics by slip casting moulding and other processes so as to improve the dispersion stabilityof silicon carbide ceramics.

The invention discloses a traditional Chinese herbal preparation for curing diabetes complications, which is prepared by the following main raw drugs with weight prescription ratios: 5 portions to 10 portions of angelica, 5 portions to 10 portions of rhizoma ligustici wallichii, 5 portions to 10 portions of astragalus hoangtchy, 5 portions to 10 portions of radices puerarire, 10 portions to 15 portions of earthworm, 10 portions to 15 portions of Ramuli mori; and though the following technique: angelica, rhizoma ligustici wallichii, astragalus hoangtchy, earthworm, radices puerarire and Ramuli mori are selected according to the weight ratio and added with water with the weight of 10 to 15 times, soaked for 24 to 36 hours, and decocted and boiled for 3 times, and then the decoction liquids of the three times are integrated and filtered; the filtrate is collected and concentrated into a dense ointment with a relative density of 1:1.25 to 1.35 for a standby purpose; the dense ointment is roasted at low temperature for 10 hours for obtaining dry ointment powders, and auxiliary materials are added in the weight ratio that the ointment powder : dextrin equals to 1:0.5; and the dry ointment powders are input to capsules separately after being made into grains. The prescription has effects of supplementing qi and nourishing yin, promoting blood circulation and freeing channels, has unique healing effects for making better blood sugar, blood fat and blood circulation obstacles of Type 2 diabetes patients and experimental diabetes rats, promoting the regeneration of micro-blood vessels, protecting the endothelium and the like.

The invention relates to the technical field of medicine application, in particular to application of radix bupleuri liver-soothing powder to preparation of a medicine for non-surgical or chemoradiotherapy treatment of breast cancer. Studies discover that radix bupleuri liver-soothing powder can inhibit growth and proliferation, as well as clone formation ability, of the breast cancer cells and growth of breast cancer transplantation tumors. According to the complicated etiology and pathology of breast cancer, the medicine is mainly used for dispersing the liver and rectifying qi, and promoting blood circulation to remove blood stasis, and can achieve the treatment effect through overall body conditioning. The medicine can be directly used for treating breast cancer without surgeries or chemoradiotherapy to achieve a very good anti-tumor effect, and therefore, a simple and effective treatment medicine is provided for treatment of breast cancer. Meanwhile, the medicine is a traditional Chinese medicine compound, can be widely used clinically, is small in side effect and definite in curative effect, so that the life quality of patients is improved, and the economical burden of the patients is relieved.

The invention relates to expandable polyethylene. The expandable polyethylene is prepared from the following raw materials in parts by weight: 100-155 parts of polyethylene, 10-15 parts of modified VAE emulsion, 10-19 parts of titanate modified calcium carbonate, 3-7 parts of aluminum hydroxide, 2-3 parts of monoglyceride, 6-10 parts of a foaming agent, 1-3 parts of talcum powder, 1-3 parts of a flame retardant, 5-10 parts of water glass and 1-3 parts of a silane coupling agent. The modified VAE emulsion is added into the expandable polyethylene, so that the connection stability of the expandable polyethylene can be improved, the surface charges of latex particles are increased in the reaction process, the mutual repulsion effect between latex particles is enhanced, the mutual coalescenceis reduced, and the system is stable.

The invention discloses a ceramic dry-method powder-making, dust-collecting and impurity-removing integrated device, which comprises a base, a supporting plate, a control box, a dust separation tower, a dust collection and impurity removal integrated absorption mechanism, a centrifugal unpowered impurity quick separation mechanism, an impact type dust electrostatic adsorption mechanism, a resistance coefficient dust recovery mechanism and a gas jet impact cooling mechanism. The invention belongs to the technical field of ceramic dry-method powder preparation, and particularly relates to a ceramic dry-method powder preparation, dust collection and impurity removal integrated device. Separation of large impurities in air is achieved through the centrifugal unpowered impurity quick separation mechanism, the centrifugal movement principle is creatively applied to the technical field of ceramic dry method powder preparation, and driving of centrifugal separation movement is completed through interaction force between magnetic fields; the technical problem that in the prior art, impurities in air are difficult to remove under the condition that no impurity removing equipment exists is solved.

The invention relates to the technical field of health-care wine, particularly a pomelo peel fruit wine which is composed of pomelo peel, almonds, boxthorn root, mulberries, grapes, litchi, fructus momordicae, nutrients and distillery yeast. By using naringin, pectin and other beneficial components in the pomelo peel, the fruit wine has favorable preventive effects on septicemia, cerebral thrombosis, intestinal tract disease and other diseases, and can supplement nutrient elements required by the human body. Under the synergistic actions of the nutrients, the fruit wine has better disease prevention effects, effectively utilizes the pomelo peel, and avoids the waste of resources and the influence on the environment.

The invention discloses a monodisperse Cu2O single crystal solid sphere with a controllable particle size and a preparation method thereof. A micromolecule ligand at least comprises two carboxyl groups, and a high-molecular ligand is polyvinylpyrrolidone. The specific process comprises the following steps: preparing a copper source, the high-molecular ligand, the micromolecule ligand and a mixed solution of water and polyhydric alcohol, then dropwise adding a certain amount of an alkali solution into the solution, adding a reducing agent step by step at 20-80 DEG C, and carrying out centrifuging to obtain the monodisperse Cu2O single crystal solid sphere. According to the monodisperse Cu2O single crystal solid sphere with controllable particle size and the preparation method thereof, operation is simple and cost is low, and the monodisperse Cu2O single crystal solid sphere with a particle size of 40-600 nm can be obtained only by adjusting the amount and variety of the micromolecule ligand. The microsphere provided by the invention can be widely applied to the fields of photonic crystals, electrodes of lithium-sulfur batteries, and catalytic photolysis of water.

The present invention relates to a method of treating cellulose fibres. The invention further involves the production of paper from said treated fibres and the paper obtainable therefrom. The invention also relates to the use of a cellulose derivative as an additive to an acidic bleaching stage.

The invention discloses a preparation process of nanometer zinc oxide with antibacterial performance, belonging to the technical field of environmental protection. The preparation process comprises the following steps: (1) preparation of a colloid a; (2) preparation of a colloid b; (3) colloid mixing; and (4) electric field treatment. The antibacterial property of the zinc oxide prepared by usingthe method is greatly improved; and surface charges of the nanometer zinc oxide are increased by introducing silk fibroin, and the surface charges react with bacteria carrying negative charges on thesurface to destroy the surface structure of the bacteria, so the antibacterial property of the zinc oxide is improved.