879results about How to "Uniform dispersion" patented technology

A light guide plate and method for fabricating the same are proposed. An injection molding process is performed to form at least an arc-shaped first opening portion on the light guide plate, so that a concave lens structure is formed on an edge of the first opening portion to be in line with a light source. By such arrangement, the concave lens structure can direct light and achieve a uniform light dispersion effect.

The invention relates to a high-capacity SiOx based composite negative electrode material, a preparation method and a battery, wherein the negative electrode material comprises a silicon oxide material, a carbon material and an amorphous carbon coating layer; the silicon oxide material is silicon oxide or silicon oxide material modified in a carbon coating manner; surfaces of carbon material particles are coated with the silicon oxide material. A preparation method of the high-capacity SiOx based composite negative electrode material comprises the steps of performing physical processing or carbon coating modification on a silicon oxide raw material, thus obtaining a micron-sized silicon oxide material; and then mechanically fusing, coating with a solid phase and sintering at a high temperature to obtain the high-capacity negative electrode material. Through the high-capacity SiOx based composite negative electrode material, the effect of uniform dispersing and coating of the micron-sized silicon oxide particles on the surfaces of the carbon material particles can be achieved by virtue of the combination of mechanical fusion and solid-phase coating processes. The silicon oxide particles are well dispersed on the surface of the carbon material particle; the strength of bonding between the silicon oxide particles and the carbon material particles is high; the recycling performance of the material can be greatly improved; and meanwhile, the high-capacity SiOx based composite negative electrode material is high in first efficiency (breaking through the theoretical efficiency of SiOx), low in expansion rate, long in service life, environmental-friendly, pollution-free and low in cost.

The invention discloses a production method for a sauced split duck leisure food. The method is characterized in that: the split duck and accessories thereof are adopted as raw materials; a production process of the method comprises defrosting, adjusting, rolling and kneading, sousing, bittern, baking, cutting, mixing, vacuum packaging, sterilizing, rinsing and drying. The raw materials for the sousing comprise, by weight, 100 parts of the split duck raw material, 0.80-1.20 parts of a salt substance, 0.005-0.50 parts of a flavor enhancer, 0.05-0.15 parts of a sweeting agent, 0.10-0.30 parts of a deodorization agent, 0.008-0.035 parts of a pigment, 0.005-0.06 parts of a preservative, 0.04-0.10 parts of a flavoring agent. The raw materials for the bittern comprise, by weight, 100 parts of the soused split duck, 0.20-0.40 parts of the flavor enhancer, 0.05-0.20 parts of a flavoring agent, 0.01-0.04 parts of a toner and 0.8-1.2 parts of a perfume. The products prepared by the method have delicious and rich fragrance, moderate salt taste, mellow flavor, a unique flavor of the sauced products.

This invention refers to a fabric liquidate liquid used of killing mosquito and method of application and produce. The quality pencent direction of fabric liquidate liquid include pesticide and / or repellent 0.05-40.00%, bond 5.00-40.00%, crosslinking agent 0.025-1.50% and the rest is watetr, the sum of each elements is 100%. The pesticide and repellent is aqua repellent of effective content 1%-50%, the bond is aqua repellent of effective solid content 40%-50%. The use method of fabric liquidate liquid adopt printing liquidate fabric. After use the fabric liquidate liquid and dipping, adjust the roller press, enter in the drying machine with control contained liquid rate 30-150% and the drying temperature is 60-250oC.The textile which make use of fabric liquidate liquid or liquidate method is fiber fabric produce.

The invention discloses aluminum alloy and an aluminum alloy extruded profile machining method. The aluminum alloy comprises, by weight, 0.6-1.4% of Si, 0.7-1.3% of Mg, 0.1-1% of Cu, 0.1-1% of Mn, 0.01-0.15% of Ti, 0-0.2% of Zr, 0-0.5% of Cr, 0-0.4% of Fe, 0-0.25% of Zn and the balance Al. The aluminum alloy also meets the requirements that the weight percentage range of Mg+Si+Cu is 1.4-3.7%, themole ratio of Mg to Si is 0.7-1.5, and the weight percentage range of Mn+Cr+Zr is 0.1-1.5%. The machining method comprises the steps that (1) a cast ingot of the alloy is subjected to homogenization treatment; (2) the cast ingot is extruded into aluminum profile; (3) extrusion production is conducted; (4) on-line quenching is conducted; (5) tension leveling is conducted; and (6) artificial aging is adopted. According to the aluminum alloy and the aluminum alloy extruded profile machining method, the technology is simple, and the production cost is low.

The invention discloses a polyvinylidene fluoride hollow fiber film and a preparation method thereof. The polyvinylidene fluoride hollow fiber film comprises the following components by weight percent: 20-60% of polyvinylidene fluoride resin, 10-50% of organic pore-forming agent, 1-30% of inorganic pore-forming agent and 5-30% of solvent. The preparation method comprises the following steps: mixing, squeezing, cooling, stretching, extracting the organic pore-forming agent and the inorganic pore-forming agent, and thermally shaping. The obtained polyvinylidene fluoride hollow fiber film has the advantages of high strength, good performance, better hydrophilicity, simple preparation process and energy saving.

The invention relates to water-soluble polymer / graphene composite fiber as well as a preparation method and application thereof. The cross section of the fiber is special-shaped, the surface of the fiber is of an orientated micro-fiber-shaped structure, the strength of the fiber is greater than 100 MPa, the elongation at break is greater than 2%, and the conductivity of the fiber is greater than 0.1 S / cm. The preparation method comprises the following steps: preparing a composite spinning liquid, extruding into a coagulating bath for curing, drafting, leading out of the coagulating bath, drying, and coiling, thereby obtaining the water-soluble polymer / graphene composite fiber; and finally reducing by using a chemical or physical method, thereby obtaining the water-soluble polymer / graphene composite fiber. The cross section of the composite fiber provided by the invention is of a special-shaped structure, the surface of the fiber is of a rich groove micro structure, the strength and the toughness of the fiber are greatly improved when being compared with those of pure graphene fiber, and good conductivity is still maintained, so that the water-soluble polymer / graphene composite fiber has a wide application prospect in the fields such as anti-electrostatic and conductive fabrics, electromagnetic wave absorption and shielding fabrics, energy storage devices, sensors and water treatment.

The invention relates to a preparation method of a high dispersion metal-organic framework (MOF) / organic hybrid priority alcohol through composite membrane, belonging to the technical field of membrane separation. The method comprises the steps of cleaning MOF crystal particles, and dispersing the cleaned crystal particles into a polar solvent without drying to form stable MOF emulsion; dissolving 0.5-5wt% of high-molecular polymer into a solvent, feeding the MOF emulsion, and then feeding a cross-linking agent and a catalyst to prepare membrane liquid A; dissolving 8-20wt% of high-molecular polymer into the solvent, and feeding the cross-linking agent and the catalyst to prepare membrane liquid B; dipping a base membrane into the membrane liquid A, taking out the base membrane and drying; dipping the surface of the base membrane for a plurality of times to obtain a nascent state MOF / high-molecular polymer hybrid separation layer; after that, dipping the base membrane into the membrane liquid B, taking out the base membrane and drying; putting into a vacuum oven to enable the high-molecular polymer to be completely cross-linked on the surface of the base membrane. The prepared hybrid composite membrane has excellent alcohol through performance and potential application value.

Nanoparticle catalysts are manufactured by first preparing a solution of a solvent and a plurality of complexed and caged catalyst atoms. Each of the complexed and caged catalyst atoms has at least three organic ligands forming a cage around the catalyst atom. The complexed and caged catalyst atoms are reduced to form a plurality of nanoparticles. During formation of the nanoparticles, the organic ligands provide spacing between the catalyst atoms via steric hindrances and / or provide interactions with a support material. The spacing and interactions with the support material allow formation of small, stable, and uniform nanoparticles.

The invention provides a method for preparing a polyimide nano-film. The method comprises the steps: firstly, synthesizing polyimide resin from aromatic tetracid dihydride, aromatic diamine and aromatic diisocyanate; and then, mixing the polyimide resin, a polar organic solvent, a diluent, a film forming agent and a molecular weight regulator so as to obtain a polyimide solution system, then, carrying out nano-scale uniform spreading on a clean substrate by dint of the action of a mechanical external force of 0.5N to 30N, and then, carrying out an imidization method, thereby preparing the polyimide nano-film. According to the film, the high-temperature resistance is 10 seconds at the high temperature of 400 DEG C to 750 DEG C, and the electrical insulation property is that the dielectric constant is 1.5 to 4.5 at the frequency of 103Hz. Compared with the prior art, the polyimide nano-film prepared by the method has the advantages of excellent surface physical properties and stable chemical properties, high-temperature resistance, electrical insulation properties and chemical corrosion resistance.

The present invention relates to a flame-resistant and heat-resistant copper clad laminate preparation method, which comprises: adopting nanometer silica foam, dodecyl benzenesulfonic acid, bismuth nitrate pentahydrate, methyl trichlorosilane and polyoxyethylene sorbitan monooleate as a raw materials to obtain a filler; adopting DOPO, a bisphenol A cyanate ester monomer, a phenol compound, a m-nitrobenzene sulfonic acid pyridine salt, 2,3-epoxy cyclopentyl cyclopentyl ether and dimethyl phosphonate as raw materials to obtain a resin prepolymer; adding the filler to o-phthalic acid diglycidyl este to obtain an active filler; mixing the resin prepolymer and an indole compound, and then adding the active filler and isomeric undecanol polyoxyethylene ether phosphate potassium salt to obtain a composite system; and carrying out hot pressing molding on the composite system, a reinforced material and metal foil to obtain the flame-resistant and heat-resistant copper clad laminate, wherein the flame-resistant and heat-resistant copper clad laminate has characteristics of excellent flame retardant property and excellent heat resistance, and meets the development applications of the flame-resistant and heat-resistant copper clad laminate.

The present invention relates to a carbon fiber sizing agent comprised of water-soluble thermoplastic resin and amphoteric surfactant within a weight ratio range of 6 / 1 to 1 / 3, a carbon fiber sizing method comprising treating carbon fibers using a sizing liquid containing the aforementioned sizing agent, sized carbon fibers comprising adhering the aforementioned sizing agent to their surfaces, and a fabric that uses said carbon fibers. The carbon fiber sizing agent of the present invention has satisfactory solubility in water over a wide pH range, and is able to impart to carbon fibers adequate convergence for forming stable chopped carbon fibers, superior workability and satisfactory uniform tow dispersibility in water over a wide pH range. Since a fabric of the present invention demonstrates affinity to water over a wide pH range, it is suitable for applications such as immersing said fabric in an aqueous matrix in order to impregnate the fabric with that matrix.

The invention relates to a casting material used for producing pellet rotary kiln and a preparation method thereof, the casting material is a combination, and contained components and weight percentage occupied in the combination contain: 70 to 92 percent of casting material basal body, 3 to 8 percent of micro powder of monox or micro powder of alumina, 0.001 to 5 percent of zirconium mullite or zirconite, 1 to 12 percent of carborundum, 0.005 to 5 percent calcium aluminate cement and 0.01 to 1 percent of dispersant; the casting material basal body is the combination of one or several of corundum, bauxite and porzite. The preparation method of the casting material has the following steps: first uniformly mixing the casting material basal body, then adding other components to be uniformly mixed, and finishing goods. The casting material contains the carborundum, the carborundum has the characteristic of difficult infiltration with furnace burden containing iron, and ring formation materials are difficult to be felted on a furnace brick lining; in addition, the carborundum can increase acidic furnace burden anti-corrosion performance of the casting material, and thus the life of the rotary kiln is enhanced. The preparation method of the casting material is simple and has low cost.

The invention relates to a sodion-embedded manganese dioxide nanometer sheet electrode as well as a preparation method and an application of the electrode. The electrode can be used as the active material of a supercapacitor and comprises sodion-embedded manganese dioxide nanometer sheets evenly distributed on the surface of a foamed nickel substrate. The preparation method comprises the following steps of: (1) mixing sodium sulfate and manganese acetate to prepare an electrochemical deposition precursor solution; (2) setting up an electrochemical deposition platform through a three-electrode method and taking the foamed nickel substrate after pretreatment as a working electrode, a platinum electrode as a counter electrode and a saturated calomel electrode as a reference electrode; (3) soaking the electrodes in the electrochemical deposition precursor solution at same depth; (4) opening an electrochemical workstation, setting the working electrode to the anode, setting the working mode to a timing potential mode, and starting up the electrochemical workstation; (5) taking out and washing the working electrode after the electrochemical workstation stops working; and (6) drying to obtain the sodion-embedded manganese dioxide nanometer sheet electrode. The sodion-embedded manganese dioxide nanometer film electrode as well as the preparation method and the application of the electrode disclosed by the invention have the characteristics of simple technique, mild reaction condition and excellent electrochemical performance of materials.

The invention relates to a corona-resistant polyimide film containing high-concentration nano metal oxide, which comprises the following main components: benzenetetracarboxylic anhydride, 4, 4'-diamino diphenyl ether and nano-scale aluminum oxide, wherein the particle size of the nano-scale metal oxide is in the range from 30nm to 50nm. The film provided by the invention has the following outstanding advantages that a novel coupling agent is synthesized and is compounded with titanate coupling agent NDZ-130 to conduct surface modification on prepared alpha-Al2O3, thus the modified nano-particles can be steadily and uniformly dispersed in the substrate polyimide film with relatively high mass percentage (can reach 30wt%). By adoption of the above novel technical scheme of the invention, the technical problem that high-concentration nano-metal oxide is very difficultly doped uniformly in the corona resistant polyimide film according to the prior art is solved well, and meanwhile the mechanical strength of the film is kept from dropping.

The present invention relates to composite material preparing technology. The production process of nano composite silica / polyester material includes the following steps: coating nano silica as crystallizing nucleartor with organic matter for surface modification to make it capable of distribute well in ethylene glycol as one monomer for polyester; high temperature pre-treating compounded nano silica / ethylene glycol slurry to make nano silica possess average size smaller than 100 nm; and polymerization or copolymerization between nano silica / ethylene glycol slurry and other monomer for polyester inside reactor to obtain in-situ nano composite silica / polyester material. The composite material with 1 wt% of nanometer silica contained has non-isothermal crystallization melting peak temperature raised to 213.4 deg.c and 4-8 times raised isothermal crystallization rate at 185-200 deg.c.

The invention discloses an emulsion of micron-sized docosahexenoic acid (DHA) and a preparation method thereof. The emulsion of micron-sized docosahexenoic acid (DHA) comprises: 50g to 150g of DHA, 10g to 50g of coating agent, 14g to 130g of oil phase emulsifier, 8g to 50g of aqueous phase emulsifier, 75g to 350g of thickening and stabilizing agent, 10g to 100g of dispersant and 0.5g to 20g of antioxidant; water is added for obtaining solution of 1000g. The emulsion of the invention is O / W type and mainly characterized in that the emulsifiers and the thickening and stabilizing agent are emulsified with the DHA and water according to certain proportions so as to obtain the emulsion with stable status and emulsified particle diameter less than 1 micron. The invention provides a prescription of a DHA emulsion capable of dispersing in cold water, provided with good stability and is stable against light, heat and oxygen and can be conveniently used in beverage, food and other relevant industries.

The invention discloses a polyvinylpyrrolidone hybridized graphene catalyst carrier material and a preparation method and application thereof. The material is prepared by covalently introducing polyvinylpyrrolidone to surfaces of a graphene material, and is particularly prepared by steps of 1), covalently anchording silane coupling agents on the surface of graphite oxide to obtain silane coupled graphene oxide slurry with double bonds as the end group; 2) adding tetrabutyl ammonium hydroxide solution and hydrazine hydrate, leaching and drying to obtain silane coupled graphene powder with double bonds as the end group; 3), adding the prepared powder, initiators, N-vinyl pyrrolidone into ethanol solvent, and drying at the normal temperature so as to obtain the polyvinylpyrrolidone hybridized graphene catalyst carrier material. The prepared polyvinylpyrrolidone hybridized graphene catalyst carrier material has the advantage of easiness in separation. After being loaded on the carrier material, catalysts are dispersed on the surfaces of carriers uniformly and are uniform in size, and cannot fall off or reunite during repeated use.

The invention discloses a high performance XNBR rubber containing graphene oxide and its preparation method. The preparation method comprises the following steps: adding graphite oxide into a surface modifier for ultrasonic stripping; carrying out centrifugal separation so as to obtain surface modified single-layer graphene oxide; mixing the single-layer graphene oxide with XNBR rubber latex; then successively adding an anti-aging agent and a flocculant and preparing a rubber mixture by using a co-coagulation method; and adding a vulcanizing agent for vulcanization so as to obtain graphene oxide-containing XNBR vulcanized rubber with high mechanical properties and high thermal conductivity. According to the invention, since the surface modifier is added in the process of stripping, stability and surface tension of graphene oxide suspension are changed, graphene oxide and the latex are allowed be uniformly mixed, and the degree of homodisperse of graphene oxide in a polymer is improved, and therefore, the purpose of improving mechanical strength of XNBR is achieved.

The invention relates to a nano iron oxide red preparing method, fully mixing crystal converting agent and lye under normal temperature and pressure, then stirring and adding the product obtained by oxidizing soluble trivalent or bivalent ferric salt solution at the same time to form gelatin, then adding in buffer solution, maintaining the pH value of the mixed liquid within 8-12, heating and maintaining the reaction temperature within 85-110 deg.C aging for 5-20minutes, centrifugating turbid liquid by centrifugal pump, washing for 3-5times, drying for 1.5-3hours under 25-50 deg.C, and grinding to obtain single disperse nano alpha-Fe2O3 particles. The particle size can be regulated and controlled within 10-100nm, the distribution even.

The invention relates to a preparation method of a bismuth oxychloride pearlescent pigment. The method comprises the following steps of: preparing a bismuth salt acidized water solution with a certain concentration by using bismuth salt as raw material, adding water to regulate the PH value of a reaction system, controlling the process parameters such as reaction temperature, reaction time and stirring strength, hydrolyzing the bismuth salt to prepare polygonal (such as quadrilateral or octagonal) laminar pearlescent bismuth oxychloride crystal. The raw material in the preparation method provided by the invention is cheap and easy to obtain, the morphological control can be performed in the bismuth hydrolysis process without adding a surfactant, and the PH value of the reaction system can be controlled without adding alkali liquor; the prepared bismuth oxychloride crystal is uniform in dispersion, good in pearlescent effect, simple in operation process, and good in industrial application prospect.

The invention relates to the technical field of pouring sealant, in particular to modified epoxide resin pouring sealant and a preparation method of the modified expoxide resin pouring sealant. The modified epoxide resin pouring sealant achieves improvement based on the prior art. The pouring sealant is composed of a component A and a curing agent. The weight ratio of the component A to the curing agent is 100 to 3-15, wherein the component A comprises, by weight, 1.0-8.0% of thinner, 25.0-39.0% of nano filler, 0.5-4.5% of flexibilizer, 0.08-0.45% of coupling agent, 0.08-0.45% of pigment, and the balance grapheme modified epoxide resin, and the total weight is equal to 100%. Compared with the prior art, due to addition of the grapheme modified epoxide resin and the nano filler, the pouring sealant is capable of improving high and low temperature resistant impact properties, capable of reducing hygroscopicity and a dilatation coefficient, capable of prolonging storage time, capable of strengthening dehiscence resisting capacity, and capable of having great value of industrial application.

The invention relates to a preparation method of an organic / inorganic nano-assorted fiber. The preparation method comprises the procedures that (1) inorganic substance suspends in dimethyl acetamide or formic acid spinning solvent in the water bath with the temperature of 20 to 60 DEG C; macromoleclar polymer is added and stirred at the rotating speed of 200 to 450rpm and swells for 24 hours in the water bath with the temperature 20 to 60 DEG C; and the macromoleclar polymer is cooled to room temperature to acquire dope with even dispersion: and (2) the dope is poured into a liquid reservoir; a bullet-shaped syringe needle is adopted as a capillary for spraying a streamlet; after HYEF spinning, the dope is dried under vacuum and normal temperature; and optional post-treatment is carried out, the functional composite nano fiber is made. The preparation method is simple with mild preparation condition and simplifies compound process. The composite nano fiber has high superficial area and is widely dispersed, so the composite nano fiber is applicable for preparing a drug delivery system, anti-bacterial textile, material separation, the water pollution treatment of metal ions and organic compound, etc.

Disclosed is a heat-curable powder coating composition that allows the formation of a coating film having outstanding long-term corrosion resistance, as well as outstanding chipping resistance, flexibility, and adhesion.The disclosed heat-curable powder coating composition is characterized by a resin having crosslinkable functional groups that are solid at room temperature (A), a curing agent capable of reacting with said crosslinkable functional groups (B), a fibrous filler (C), and heat-expandable resin particles (D).

The invention belongs to the technical field of carbon material and electrochemistry, and discloses a hetero atom-doped hollow spherical grapheme composite material, and a preparation method and applications thereof. The preparation method comprises following steps: styrene, polyvinyl pyrrolidone, and 2,2'-azobis(2-methylpropionamidine) dihydrochloride are mixed with water, and positively charged polystyrene spheres are prepared under certain conditions; a graphene oxide aqueous dispersion and a positively charged polystyrene sphere aqueous dispersion are stirred for reaction so as to prepare a graphene oxide@polystyrene sphere compound; a hetero atom-doped sourced compound and a solvent are added into the graphene oxide@polystyrene sphere compound, and an obtained mixture is subjected to mixing, coating, and freeze drying so as to obtain solid thin films; a substrate loaded with the solid thin films is delivered into a plasma high-temperature tubular reactor for reaction so as to obtain the hetero atom-doped hollow spherical grapheme composite material. The hetero atom-doped hollow spherical grapheme composite material possesses relatively high specific surface area and relatively excellent electrical properties, and can be applied to the field of supercapacitor.

The invention discloses electroconductive slurry and a preparation method thereof, and a printed circuit material. The electroconductive slurry comprises a polymer resin matrix and metal powder which is dispersed in the polymer resin matrix and serves as an electroconductive filler, wherein the microstructure of the metal powder is a three-dimensional dendritic metal crystal structure; the diameter of the metal crystal structure is 0.5-50 microns; a second-stage dendritic structure is 5 nanometers- 5 microns long. According to the electroconductive slurry and the preparation method thereof which are disclosed by the invention, the metal powder with the three-dimensional dendritic metal crystal structure serving as the microstructure is used as the electroconductive filler, so that the percolation threshold value of the electroconductive slurry can be greatly reduced, and the higher electroconductivity can be realized with less metal filler; furthermore, the metal powder with the three-dimensional dendritic metal crystal structure serving as the microstructure is used as the electroconductive filler, so that the electroconductive slurry can keep a high isotropous electroconduction effect and uniform dispersion; due to a nano-end structure, the resistivity of the electroconductive slurry can be greatly reduced, and the electroconductivity can be improved.

The invention discloses a lithium ion battery lithium-enriching technology and a lithium ion battery prepared by the technology. The lithium-enriching technology comprises the following steps: evenly pre-mixing lithium powder and EC powder under a dry state at a temperature which is lower than the melting point of EC, then heating the mixture to a temperature which is higher than the melting point of EC to melt EC powder to evenly disperse lithium powder in the EC solvent so as to obtain lithium powder slurry; painting the obtain lithium powder slurry on at least one of the positive electrode sheet, the negative electrode sheet, or the diaphragm of a lithium ion battery, and then cooling to a temperature that is lower than the EC melting point so as to obtain a positive electrode sheet, negative electrode sheet and / or diaphragm containing a lithium-enriched surface layer. Compared to the prior art, the lithium-enriching technology has the advantages of simple preparation method, even dispersing effect, and no destruction on the surface protective layer of lithium powder during the dispersing process, moreover, the lithium-enriched layer does not to be dried after painting, and thus the phenomenon that lithium powder is oxidized and released into the air during the high temperature baking process is effectively avoided.

The invention discloses a method for preparing graphene-noble metal inorganic nanoparticle compound hydrogel. The method comprises the steps of 1, evenly mixing oxidized graphene dispersion liquid, a noble metal compound and a reducing agent to obtain mixed liquid; 2, irradiating the mixed liquid with high-energy ray for irradiation reaction. The invention further provides compound hydrogel prepared with the method, and aerogel prepared after drying. According to the method for preparing the hydrogel, the in-situ reduction self-assembly method is adopted by means of the irradiation technique, operation is easy, and environment friendliness is realized; the compound aerogel is of a macroporous structure, noble metal is evenly dispersed and adsorbed on the surface of oxidized graphene, functions of graphene aerogel and functions of noble metal nanoparticles are combined, electric conductivity is high during organic solvent adsorption, corresponding electro-catalysis reaction is made feasible, and the method has great potential application value in organic reaction catalyzed synthesis including micromolecule electroanalysis and electro-catalysis, synthesis of petroleum organic intermediate and other fields.

The present invention provides a microbial fermented composite antibiotic-free feed containing natural antibacterial components. The feed comprises a fermented product based on the united segmented fermentation of aerobic-anaerobic composite strains, composite natural antibacterial components, a non-plant source protein / polypeptide compound nutrient supplement agent, and an additive comprising atleast a soybean protein amino acid / polypeptide compound chelate. The composite strains comprises at least lactic acid bacteria, bacillus subtilis, yeast selected from candida utilis or saccharomyces cerevisiae, and enterococcus faecalis. The fermented product based on the united segmented fermentation is prepared by carrying out secondary fermentation on fermentation raw materials through the aerobic-anaerobic composite strains. The combination of the microbial fermented feed and the natural antibacterial components is beneficial to the balance of intestinal flora of animals, and can prevent the dysbacteriosis of digestive tracts, improve the immunity functions of animal organisms, reduce or replace the use of feed antibiotics, and significantly improve the digestion and absorption efficiency of the feed and the meat quality of animals.