497results about How to "The preparation method is safe" patented technology

The invention discloses a silicon monoxide/silicon/lithium metasilicate composite negative electrode material. The silicon monoxide/silicon/lithium metasilicate composite negative electrode material comprises a silicon monoxide/silicon/lithium metasilicate composite material and an inorganic matter coating layer. The invention also provides a preparation method of the silicon monoxide/silicon/lithium metasilicate composite negative electrode material. The preparation method comprises the following steps: taking silicon monoxide and an inorganic compound of lithium element, mixing and ball-milling the silicon monoxide and the inorganic compound of the lithium element, sintering the obtained mixture in a protection gas environment, and naturally cooling the sintered mixture to obtain the silicon monoxide/silicon/lithium metasilicate composite material; and mixing and ball-milling the silicon monoxide/silicon/lithium metasilicate composite material and sintering the obtained mixture undera protection gas condition. The preparation method of the silicon monoxide/silicon/lithium metasilicate composite negative electrode material has the advantages of simplicity, safety, low cost, and easiness in operation and industrial production, and the obtained composite negative electrode material has the advantages of high reversible capacity, excellent cycle performances and high initial Coulomb efficiency.

The invention relates to a fluorine-free nano durable super hydrophobicity finishing method for cellulose fabric, which comprises the following steps: (1) preparing hydrous medium solution containing tetra-alkyl ester silicate, polycarboxylic acid and a crosslinked catalyst, oscillating and stirring the hydrous medium solution to obtain SiO2 sol, soaking and rolling the cellulose fabric twice respectively, and curing the cellulose fabric; and (2) preparing non-aqueous solvent solution of alkyl siloxane catalyzed and hydrolyzed by using inorganic acid or organic acid water solution, soaking the cellulose fabric in the solution, and curing the cellulose fabric. The method is simple and safe, has low performance requirement on equipment, is easy for industrialization, and is particularly applicable to the hydrophobicity finishing of the cellulose fabric.

The invention relates to flexible wearable fabric, in particular to a multifunctional wearable polymer/MXene compound fabric heater and a preparation method thereof. The preparation method of the polymer/MXene compound fabric heater comprises the following steps that (1) polymer-based fabric is washed after being soaked in an alkali solution, and pre-treated polymer-based fabric is prepared; (2),LiF powder and an HCl solution are stirred to prepare an etching solution; (3) MAX phase powder is added into the etching solution to be stirred, reaction products are prepared, the reaction productsare centrifuged after being diluting, supernate is removed, sediment MXene is prepared, deionized water is added into the sediment MXene, ultrasonic treatment and centrifugation are carried out successively, and an MXene solution is prepared; and (4) after being dipped in the MXene solution, the pre-treated polymer-based fabric is taken out and then dried, and the polymer/MXene compound fabric heater is prepared. When the thickness of the prepared polymer/MXene compound fabric heater is 340 micrometers, the electromagnetic shielding effectiveness of the polymer/MXene compound fabric heater is42.1 dB, and meanwhile the polymer/MXene compound fabric heater has good permeability, flame retardant and anti-bacterial functions.

The invention provides a novel coronavirus antigen epitope and application thereof. A super computer is used for simulating S, E, M and N protein structures of the novel coronavirus, and novel coronavirus epitopes SEQ ID NO 1-38 are obtained through calculation. The epitopes have very good immunogenicity; an antibody generated by inducing a part of epitope polypeptide has the effect of neutralizing the novel coronavirus; the antigen epitope can be combined with antibodies in serum of novel coronavirus patients at home and abroad, has the potential of resisting various novel coronavirus strains, and also has the potential of identifying and applying different strains. The epitope provided by the invention can be used for (1) research and development of novel coronavirus vaccines and universal coronavirus vaccines such as MERS viruses and SARS viruses; and (2) preparing a novel coronavirus antibody, and further detecting and typing viruses and treating diseases caused by the viruses. Thenovel coronavirus antigen epitope has a wide application prospect in the aspects of prevention of coronavirus and propagation and outbreak thereof, and detection and diagnosis of virus strains.

The invention discloses a polymer-coating silicon/lithium metasilicate cathode material, which is prepared from a silicon/lithium metasilicate composite material and a polymer coating layer coating the outside of the silicon/lithium metasilicate composite material; and the polymer coating layer is a coating layer formed by one of polypyrrole, polyaniline, polydopamine and polyacrylonitrile. The invention further provides a preparation method of the polymer-coating silicon/lithium metasilicate cathode material. The preparation method comprises the following steps: preparing the silicon/lithiummetasilicate composite material and preparing the polymer coating layer. The process of the preparation method is simple and feasible, and is convenient for large-scale production; the polymer-coatingsilicon/lithium metasilicate cathode material is high in practicalization degree; the obtained material is high in reversible capacity and high in cycle performance, and has a wide application prospect in the aspect of lithium ion battery cathodes.

The invention relates to a waste polymer modified asphalt composition. The waste polymer modified asphalt composition comprises following components in parts by weight; 60-85 parts of petroleum asphalt, 6-20 parts of a waste polymer material, 1-8 parts of a compatilizer, 1-1.5 parts of SBS, 0.01-0.5 parts of a stabilizing agent, and 1-10 parts of one or more of native asphalt, coal pitch or biological asphalt. The waste polymer modified asphalt composition can well increase high-temperature storage stability of waste polymer material modified asphalt; pre-swelling performance of the polymer material and similar compatibility with asphalt are improved as the compatilizer is added; storage stability of the waste polymer material in asphalt can be improved extremely as a small quantity of SBS and a small quantity of the stabilizing agent are added; producing cost of the composition can be decreased as the native asphalt, coal pitch or biological asphalt replaces a portion of the petroleum asphalt; the prepared modified asphalt is excellent in high-temperature performance and low-temperature ductility; and the preparation method is simple, safe, and convenient for industrial application.

The invention discloses a covalent organic framework and a preparation method thereof. The preparation method comprises the following step: performing polymerization reaction on a compound shown as aformula II and hydrazine or a P-phenylenediamine compound shown as a formula IV in water in the presence or the absence of acid. The preparation method of the covalent organic framework utilizes the water as a reactive solvent for the first time, is high in reaction yield, safe, environmentally friendly, cost reduction and suitable for large-scale industrial production. The covalent organic framework prepared by the preparation method disclosed by the invention is larger in specific surface area and wide in application prospect in the fields of gas adsorption and separation, photo-electricityor catalysis and the like.

The invention discloses a porcine seneca valley virus strain and an application thereof. In the invention, the seneca valley virus strain CH-FJZZ-2017 is isolated from pathological materials of porcine idiopathic vesicular disease in a pig farm in Fujian Province, with the preservation number of CGMCC No. 12160. The isolated porcine seneca valley virus CH-FJZZ-2017 in the invention is isolated from swinery newly suffering from the epidemic disease within Chinese territory, represents the current epidemic predominant virus strain in China, has a good virus strain background, and can be used as an inactivated vaccine production virus strain and a virus seed for testing, thereby providing a material for subsequent relevant experimental study, and laying a material foundation.

The invention discloses an antiflaming one-component modified silane (MS) polyether sealant and a preparation method thereof. The sealant comprises an MS premix compound, a cross-linking agent, a coupling agent and a catalyst, wherein the MS premix compound consists of MS-polymer resin, a plasticizer, antiflaming packing, reinforcement packing, a thixotropic agent and a performance assistant. The preparation method comprises the steps that the MS premix compound, the cross-linking agent, the coupling agent and the catalyst are dispersed uniformity, and the efficiently antiflaming one-component modified silane polyether sealant is obtained.

The invention discloses a preparation method of a stripping boron nitride anticorrosive coating. The preparation method specifically comprises the following steps: 1, performing ultrasonic stripping on hexagonal boron nitride in a solvent, washing, and performing freeze-drying to prepare stripping boron nitride; 2, removing stains, iron rusts and other impurities from the surface of a base material; 3, mixing the stripping boron nitride with an organic coating by virtue of ultrasonic or mechanical stirring to prepare the stripping boron nitride anticorrosive coating; and 4, coating the stripping boron nitride anticorrosive coating to the surface of a metal matrix to obtain a stripping boron nitride anticorrosive coating layer. The preparation method disclosed by the invention can be used for effectively solving the problems in the prior art and preparing an ultrathin anticorrosive coating layer which is superior in corrosion resistance.

The invention belongs to electrochemistry technology realm, concretely referring to the Method for preparation of a spinel structure Li4Ti5O12, the getted Li4Ti5O12 material by this method and its application. The Process for preparing of Li4Ti5O12 by this invention is simple, the realization is easy, the souce of raw material is wide, and the cost is low. Adding additive can control the appearance and crystal structure effectively, improving electrochemistry performance of product. The getted material has the advantage of high specific capacity, good circulatory performance, high charging and discharging efficiency and so on. This kind of material can be used as negative electrode material of diversified lithium ion battery widely, and as electrode material of capacitor.

The invention discloses a skid and scrub resistant rotationally molded product and a preparation method thereof, and belongs to the technical field of rotationally molded materials. The skid and scrub resistant rotationally molded product comprises a low-density polyethylene base and a skid and scrub resistant layer added on the base, and the skid and scrub resistant layer is composed of linear low-density polyethylene, an inorganic wear-resisting agent, a high molecular reinforcing agent and an auxiliary agent. The rotationally molded product is prepared through three steps: processing of the inorganic superfine wear-resisting agent, preparation of a rotational molding composition for the skid and scrub resistant layer, and preparation of the rotationally molded product. The skid and scrub resistant rotationally molded product has smooth inner surface and outer surface, is good in layer combination, and has no warping, no deformation, no foams and no recesses, the scrub-wear volume loss of the product is reduced by 50% or more, and the preparation method of the skid and scrub resistant rotationally molded product is simple, safe and obvious in effect.

The invention provides a preparation method of a gel ball. The preparation method of the gel ball comprises the following steps: a, mixing sodium alginate, konjac glucomannan and sugar with water to obtain a mixed solution; b, mixing the mixed solution with citric acid monohydrate, potassium sorbate and pigment to obtain a co-mixed sol; and c, adding the co-mixed sol to a calcium lactate solution and carrying out cross-linking to obtain the gel ball. The pH value of the gel ball prepared by the preparation method is 3.9-4.4, the Brix value is 4.5%-7.5% and the particle diameter is 3.0mm-6.0mm. The gel ball is stable under the acid conditions and has small possibilities of deforming out of water, changing color and taste and growing microorganism; the gel ball can be added to jelly or other foods for use. Experimental results show that the composite gel ball prepared by the method can be placed in a heat preservation box at a temperature of 37 DEG C without change in color, taste, hardness and the like in nine weeks; microbiological detection is also qualified.

The invention discloses a tritium isotope microcell and a preparation method thereof. The microcell comprises two parts: a transduction unit and an attached part. A Si3N4 layer of the transduction unit is at the upper surface of a silicon-based PN junction; and a ring electrode in the attached part is at epitaxy of the Si3N4 layer. A titanium deuteride + titanium tritide emitting layer is formed by the following steps that: evaporation of a gold layer and a nickel layer is successively carried out on the upper surface of the Si3N4 layer; and deuterium-tritium mixing gas is used to prepare the emitting layer. The gold layer is arranged at the lower surface of the silicon-based PN junction; and one end of a negative wire is connected on the gold layer and the other end of the negative wire is connected on a negative electrode. One end of a positive wire is connected to the ring electrode; and the other end of the positive wire is connected to a positive electrode. Besides, a ceramic chip is arranged below the gold layer and is arranged at the midpoint of a pedestal; and an outer encapsulated layer is used to cover the external portion of the pedestal. According to the invention, the tritium isotope microcell has a micro body size; when the microcell works, there is no need to provide energy from the external world; and uninterruptedly outputting over six years with current of 40 nA to 1 microamp and a power of 60 nW to 0.1 microwatt. Besides, the provided preparation method has advantages of security and reliability.

The invention discloses an NBT/PVDF three-layer structured composite material for energy storage and a preparation method of the NBT/PVDF three-layer structured composite material for the energy storage. NBT particle powder is prepared through a ball-milling method; PVDF is divided into three parts which are respectively dissolved in a solvent to obtain three PVDF solutions; the NBT particle powder is divided into two parts and respectively added to two PVDF solutions to obtain two NBT/PVDF stock solutions; the NBT/PVDF stock solutions, the PVDF solutions and the NBT/PVDF stock solutions are laminated and subjected to tape casting on a glass substrate sequentially by using a multi-layer tape casting process. A middle layer of the composite material is a pure PVDF polymer, and the two layers of the upper and lower layers are NBT/PVDF composite layers, dielectric ceramic particles are added in an upper-lower two-layer structure, the polarization intensity and energy storage density are used, and the middle layer uses the pure PVDF polymer to obtain high breakdown field strength.

The present invention discloses a porcini essential oil and a essential oil seasoning, belonging to the field of food additives. The preparing method of the porcini essential oil comprises the following steps: adding porcini dry powder or porcine flavour dry powder to absolute ethyl alcohol by ratio, uniformly mixing, leaching at a temperature of 25 DEG C to 70 DEG C for 1 to 3 hours, and filtering to obtain alcohol extracting solution; concentrating under reduced pressure to obtain extract; dissolving the extract, standing, discarding deposits, and collecting superfacial solution to obtain porcini essential oil. Porcini powder essential oil and the essential oil seasoning can be obtained by adding other ingredients to the porcini essential oil. The porcini essential oil and the essential oil seasoning reserve the fragrance of porcini, and are ideal food additives. The yield of the porcini essential oil is improved by utilizing the endogenous lipoxidase of porcini with a biologic conversion method. The present invention can utilize porcini leftovers for production, so the cost is low, and porcini resources can be thoroughly utilized. The method is simple, safe and free of environmental pollution.

The invention discloses a water-soluble florfenicol clathrate with high bioavailability. The water-soluble florfenicol clathrate is prepared from the following components in parts by weight: 5-15 parts of florfenicol or pharmaceutically acceptable salt of florfenicol, 20-60 parts of a florfenicol adsorption carrier, 1-2 parts of an absorption promoter, and 10-30 parts of a florfenicol cosolvent. For the florfenicol clathrate provided by the invention, the solubility of florfenicol is effectively improved, the bioavailability of florfenicol is improved, the hemolysis property of the medicine is alleviated, the release rate of the medicine is controlled, and the bad smell is masked. The preparation method provided by the invention comprises the following steps: firstly, mixing the florfenicol adsorption carrier, the absorption promoter and the florfenicol cosolvent, adding with florfenicol or the pharmaceutically acceptable salt of florfenicol under the water bath water control condition, carrying out stirring, carrying out heat preservation, and carrying out drying, thus obtaining the florfenicol clathrate. The technological operation is simple, the abundant time and manpower are saved, and during the preparation process, no organic solvents are used, so that the preparation method is safe and reliable and is free of pollution, and the process is simple and easy to realize.