88results about How to "Widely sourced and cheap" patented technology

The invention provides a method for preparing a continuous alumina-based ceramic fiber, which relates to an alumina-based ceramic fiber, in particular to a method for preparing a continuous alumina-based ceramic fiber which takes alumina as a main component and adds a second component as a crystalling phase inhibitor. The invention provides a method for preparing the continuous alumina-based ceramic fiber, which is simple in technique and low in cost. The method comprises the steps: preparing alumina sol; preparing silicon dioxide sol; mixing the alumina sol and the silicon dioxide sol to obtain biphase sol, and adding a spinning addition agent into the biphase sol; condensing the biphase sol added with the addition agent and spinning by a dry method to obtain the gel fiber; pyrolyzing the gel fiber to obtain the ceramic fiber; and sintering the ceramic fiber to obtain the continuous alumina-based ceramic fiber.

A bone tissue regeneration guiding membrane. The invention employs an antigen-extracted mammal tissue membrane, which has a double layer structure of a compact layer and a loosening layer. The compact layer is formed by tightly arranged collagen fibers, and an external side of the compact layer is composited with a collagen coating containing active polypeptides; the loosening layer is formed by interlaced collagen fibers and is composited with ossification active factors. The prepared guiding membrane can prevent soft tissue from evolving and promote new bone formation, has good biological compatibility, hydrophilism and bone induction capability, and can be completely degraded in body without generation of harmful substances. Besides, the guiding membrane has an effect of isolating cell evolving, a characteristic of slow degradation and a longer retaining time in body than a current guiding membrane prepared from natural high-molecular polymer, and can provide enough time and space for new bone growth. The method of the invention is simple, and raw materials have wide sources and low prices, so that the method is suitable for large-scale industrial production and beneficial to lowering medical costs and mitigating patient burdens.

The invention provides a preparation method of a duramater / spinal dural transplanting substitute which is obtained by repeated freezing and thawing of dural tissue, rolling and cracking of cells, crosslinking fixed protection, accellular antigen extraction, dense surface fibrosis modification, packaging and sterilization, and has the advantages of simple method, wide raw material sources, cheap raw materials, and low cost. The prepared dural substitute completely removes components of cells and other antigen components simultaneously when protecting dural tissue natural structure and properties, is good in biocompatibility, free of immune rejection, safe and reliable, good in mechanical performance, and easy in clinical operation, can meet the needs of defect repair, has the function of promoting tissue regeneration as a loose surface is beneficial to the tissue fluid adsorption, active factor enrichment, and growth of blood vessels and cells, and has the advantages of rapidness in fusion with a host, biodegradable absorption, and good repair effect. The animal test shows that the defect can be completely repaired without brain or spinal fluid leakage, or adhesion with brain tissue, and significant rejection is not found.

The present invention relates to the field of well drilling, and discloses a primary emulsifier and a preparation method therefor, an emulsifier composition and an application thereof, and oil-based drilling fluid. The primary emulsifier comprises an amide compound and a fatty acid compound; the amide compound comprises at least one amide group, at least one unsaturated double bond, and at least one alkyl containing 14-30 carbon atoms; and the fatty acid compound comprises 20-80 carbon atoms. When the primary emulsifier is used for drilling fluid base mud, the primary emulsifier has a good emulsifying effect and excellent temperature resistance. In addition, the synthetic materials of the primary emulsifier provided by the present invention are widely available and inexpensive, non-fluorescent, and environmentally friendly, and thus the primary emulsifier has great prospects for industrial applications.

The invention relates to one-way moisture-guiding knitted double-faced fabric and a processing method thereof, belonging to the technical field of knitted fabric. The one-way moisture-guiding knitted double-faced fabric comprises a face structure and a bottom structure, wherein the face structure is made of hydrophilic fiber and the bottom structure is made of hydrophobic fiber. The processing method comprises the following steps of: weaving; preprocessing; presetting; dyeing; and after treatment. The invention has the advantages that since the hydrophilic fiber is used for the face structure and the hydrophobic fiber is used for the bottom structure, the one-way moisture guiding effect is excellent and durable, the material of the hydrophilic fiber and the hydrophobic fiber forming the face structure and the bottom structure is wide in source and low in price so as to be conductive to reducing the cost and lead the fabric to meet the popular consumption needs; the provided processing method does not need to put grey cloth into a cylinder in the pretreatment process like the existing technology; and the whole processing method is simple in the process steps, has no demanding requirement and can guarantee that the fabric has stable one-way moisture guiding property.

The invention provides a preparation method of carbon aerogel fibers. The method comprises the following steps that a spinning stock solution is prepared; a coagulating bath is prepared; the spinning stock solution is added into the coagulating bath, wet spinning is conducted, and cellulose gel fibers are obtained; the cellulose gel fibers are subjected to winding and immersed into an ageing solution for normal temperature ageing for 15 min to 1 h, the aged cellulose gel fibers are washed to be neutral with deionized water, solvent replacement is conducted with deionized water or ethyl alcohol or tert butyl alcohol, drying is conducted, and cellulose aerogel fibers are obtained; the cellulose aerogel fibers are put into a tubular furnace to be carbonized in a nitrogen environment, and the carbon aerogel fibers are obtained. The preparation method of the carbon aerogel fibers has the advantages that the raw materials are wide in resource, low in price and easy to obtain, the preparation process is simple, the spinnability is good, and the method is green and environmentally friendly, and the problem that a carbon aerogel cannot form fibers easily is solved.

The invention provides single component room temperature curing epoxy construction glue and belongs to the technical field of construction adhesive. The single component room temperature curing epoxy construction glue is formed by the following materials, by weight, 80-100 parts of epoxy resin, 5-25 parts of diluent, 10-20 parts of curing agent, 3.0-5.0 parts of coupling agent, 0.5-2.0 parts of accelerant, and 1.0-8.0 parts of filler. Compared with two-component epoxy adhesive in the prior art, the single component room temperature curing epoxy construction glue has the advantages that raw materials are wide in source and low in price; convenience is achieved in the process of construction and use, the phenomenon of waste like the two-component epoxy adhesive can not happen; and the single component room temperature curing epoxy construction glue can be cured at room temperature, and bonding requirements for stones, wood, concrete, metal, ceramics, glass and the like can be met.

The present invention relates to the field of drilling fluid, and discloses a co-emulsifier and a preparation method therefor, an emulsifier composition and an application thereof, and oil-based drilling fluid. The co-emulsifier comprises at least two amide groups and at least one hydrocarbon group comprising 7-30 carbon atoms. When the co-emulsifier is used in drilling fluid based slurry, good emulsifying effect and temperature resistance stability are obtained, and the system stability after aging is enhanced. Moreover, synthetic raw materials for the co-emulsifier provided by the present invention are widely available, inexpensive and free of fluorescence, and do no harm to the environment, thereby having a high industrial prospect.

The invention relates to a biomass sawdust fuel burning furnace, comprising a chassis frame, an incinerator, a spitfire mechanism, a fuel supply mechanism, a fuel supply box, a power transmission mechanism and an oxygen supply mechanism, wherein the chassis frame is arranged on floor; the incinerator is fixed at one end of the chassis frame, the outer wall of the incinerator constitutes a jacket and is provided with a feeding hole and a combustion-supporting air introduction mechanism, and a cover is arranged on the top of the incinerator in a matching manner; the spitfire mechanism is connected with the upper side part of the incinerator in a matching manner; the fuel supply mechanism is arranged on the other end of the chassis frame, and comprises a pair of guide rails, a moving frame, a screw rod cylinder and an extrusion screw rod; the fuel supply box is arranged on the fuel supply mechanism; the power transmission mechanism is arranged on the other end of the chassis frame; and the oxygen supply mechanism is arranged on the other end of a stand. The biomass sawdust fuel burning furnace disclosed by the invention has the advantages of high combustion efficiency, large heating quantity, low ignition point and high heating property, is friendly to the environment, good for protecting non-renewable natural resources such as petroleum and coal to embody the circular sustainable development of economy, concise in structure and convenient and safe to use; and a combustion effect can be guaranteed by introducing dense biomass sawdust into a hearth.

The invention relates to a guided tissue regeneration membrane and a preparation method thereof. The method comprises: a pretreatment step, i.e. collecting a mammalian peritoneum, conducting flowing water washing, hair removal and preliminary degreasing for standby use; an antigen removal treatment step, i.e. carrying out further degreasing on the standby peritoneum by means of an enzyme treatment process, an alkali treatment process, an acid treatment process and a hypertonic treatment process, and removing immunogenicity; a collagen fiber contraction treatment step, i.e. carrying out dehydration, non-hydrophilic substance removal and washing treatment on the peritoneum subjected to the antigen removal treatment so as to contract the collagen fibers of the peritoneum; and a drying step, spreading the contracted peritoneum on a culture dish surface to make the compact layer of the peritoneum contact the culture dish, rapidly transferring the peritoneum into a refrigerator at a temperature ranging from -60 to -80DEG C to undergo pre-freezing for 1-8h, then freeze-drying the peritoneums in a freeze dryer for 24-36h, thus obtaining a collagen membrane able to guide tissue regeneration. The guided membrane provided by the invention has a compact layer and a loose layer, also has good biocompatibility, hydrophilicity and bone induction ability, and has a long in-vivo degradation time.

The invention discloses a preparation method of a catalyst for catalyzing ozonization and decomposition volatile organic compounds (VOCs) at normal temperature. The preparation method comprises the following steps: (1) loading nano rare earth oxide coating serving as an auxiliary agent on a catalyst carrier, coating an active component, namely nano perovskite, on the carrier, on which the rare earth oxide is loaded, calcining the catalyst carrier, on which the auxiliary agent and the active component are loaded, and forming a large amount of micropores in the surface of and inside the catalyst carrier to obtain a target catalyst with pores; and (2) fixing the prepared target catalyst on a catalytic bed layer of a catalytic oxidation tower, starting an ozone generator, introducing VOC waste gas subjected to pretreatment in the catalytic oxidation tower, and performing deep oxidation on the VOCs at normal temperature of -10 to 40 DEG C to generate non-toxic and odorless substances. By the method, the VOCs can be completely oxidized at room temperature to generate carbon dioxide and water, so the method is safe in operation and low in energy consumption.

The invention discloses a vanadium-titanium nodular cast iron smelting method which comprises the steps of weighing furnace burden, smelting, spheroidizing and inoculating, wherein the smelting step comprises the sub-steps: adding oxide scale of which the addition amount is 0.5-1.5 percent of the weight of the furnace burden, and adding the oxide scale at the bottom of the furnace burden during smelting and charging; in the smelting step, after the furnace burden is molten down, adding silicon iron into molten iron for regulating the components, so as to achieve the deoxidation effect. The method has the beneficial effects that the low-price oxide scale is added into the bottom of the furnace burden during charging, and the element Ti is oxidized preferentially, so that the titanium content is reduced, the inverse spheroidizing effect of titanium is weakened, nodularizing in vanadium-titanium ductile iron is guaranteed, and a good dephosphorization effect is achieved when the oxide scale is added during smelting; the oxide scale is wide in source and low in price, the oxide scale is reasonably utilized, the production cost can be reduced, and the environment-friendly energy-saving effects are achieved. According to the method, the process is simple, the operation is convenient and the cost is low, and the comprehensive performance of the vanadium-titanium nodular cast iron is guaranteed.

The invention relates to an alpha-lauryl betaine type dimeric surfactant which is synthesized at a high yield through a reaction of alpha-halogenated aliphatic acid and binary tertiary amine. The synthesis reaction of the ampholytic ionic dimeric surfactant is a high-atom-economy reaction. The ampholytic ionic dimeric surfactant is short in synthesis route, easy and convenient to process, high in product yield and excellent in technological route synthesis performance. No corrosion or pollution is caused in the technological process, and no harmful compound is generated in the technological process, so that the synthesis technology is good in environmental friendliness. According to the method, raw materials are wide in source and low in cost, the technological route is short, production cost is low, and economy is good. The ampholytic ionic surfactant has extremely low critical micelle concentration and high capability for reducing surface tension and interfacial tension; the obtained product is excellent in lime soap dispersivity and can serve as a novel lime soap dispersant.

The invention relates to a preparation method of a natural bone repairing material with pre-plasticity. The natural bone repairing material is prepared by the steps of uniformly mixing forged bone particles and a bone collagen solution and freeze-drying at low temperature; protein and a growth factor for promoting bone formation are added into the bone collagen solution. The bone repairing material prepared by the method comprises natural inorganic components, the collagen component and the natural bone component are tightly combined, so that the stability of the material in a transplantation area is ensured and new bone can be rapidly formed. The prepared material can continuously release the active factor for bone formation for a long time, has certain elasticity and tenacity, can be cut and formed freely as required, thereby being convenient for clinic operations. Animal experiments verify that the bone repairing speed of the material is obviously higher than that of other artificial bone repairing materials. The material has simple preparation method and wide and cheap raw material resources, and the material is applicable to large-scale industrial production, can reduce medical cost and can relieve the economical burden of patients.

The invention belongs to the technical field of biomass carbon materials, and in particular relates to a lignin porous carbon nanosheet, a preparation method thereof, and an application in supercapacitor electrode materials. The preparation method of the present invention carries out layer-by-layer self-assembly of sulfonated lignin and oxalate in a selective solvent to prepare a layer-by-layer self-assembled lignin / oxalate composite, which is carbonized and pickled to obtain porous lignin carbon nanosheets. The invention provides lignin porous carbon nanosheets prepared by the above method, and its specific surface area ranges from 200 to 1500m 2 / g, the micropore specific surface area ranges from 100 to 500m 2 / g, the mesopore specific surface area ranges from 100 to 1000m 2 / g, pore size 0.5~30nm, pore volume 0.5~1.5cm 3 / g; can be applied to supercapacitor electrode materials, showing higher specific capacitance and excellent rate performance (76.6% specific capacitance retention rate), and has good potential application value.

The invention relates to the technical field of catalytic materials, in particular to a Mo2C catalytic material and a preparation method and application thereof. The invention discloses the preparation method of the Mo2C catalytic material. According to the preparation method, a large number of defect sites are manufactured on the surface of Mo2C due to intercalation and deintercalation of metal cobalt ions, and the generation of the defect sites greatly increases the active sites of the catalytic material. The Mo2C catalytic material prepared in the invention shows excellent catalytic activity and good stability when applied to hydrogen evolution reactions. In addition, the preparation method is simple to operate, high in production efficiency, friendly to environment, wide in raw material sources and low in raw material cost, so the preparation cost of the catalytic material is greatly reduced.

The invention discloses a method for converting cellulose into bioethanol by a one-pot method. Raw material cellulose, W-based catalysts, Cu-based catalysts and solvents are added into a reaction kettle; the mass ratio of the W-based catalysts to the Cu-based catalysts is 5:1-1:1; the mass ratio of the raw material cellulose to the W-based catalysts is 1000:1-1:1; the mass ratio of the raw material cellulose to the solvents is 1:100-1:1. The cellulose is used as the raw material; the mixed selective fracture C-C bond W-based catalysts and selective fracture C-O bond and hydrogenation Cu-basedcatalysts are used as a catalyst system; in one reaction kettle, the one-pot method is used to obtain high-yield ethanol; the process is simple; the scale amplification is easy; the bioethanol productobtained by the method provided by the invention can be further purified by a simple distillation method.

The invention provides epoxy resin modified waterborne hyperbranched polyurethane and a preparation method thereof, and particularly discloses epoxy resin modified hyperbranched waterborne polyurethane as refined in formula I and the preparation method thereof. By means of the method, crosslinking of hyperbranched polyester is reduced, and the obtained polyurethane possesses good water resisting property and chemical resistance, is suitable for water-based paint, waterborne adhesives and the like, or is used as phase solubilizers or catalyst supports and the like, thereby possessing wide application prospects.

The invention relates to a plasma-enhanced chemical vapor deposition preparation method of a multi-layered graphene film. The method comprises the following steps: depositing a SiC nano-film on a quartz or glass substrate; plating a layer of amorphous SiC nano-film with the thickness of 2-5 nm on the quartz or glass substrate by using a SiC ceramic as a sputtering target material by adopting a radio frequency magnetron sputtering method, wherein the temperature of the quartz or glass substrate is controlled to be at 400-500 DEG C; directly depositing the multi-layered graphene film on a buffer layer which is the amorphous SiC nano-film prepared in the step in on the quartz or glass substrate by using the plasma-enhanced chemical vapor deposition preparation method to obtain the multi-layered graphene film, wherein the temperature is controlled to be at 450-950 DEG C. The obtained multi-layered graphene film is uniform in thickness and relatively high in visible light transmittance.

The invention discloses a modified wood fibre phase change energy storage material and a preparation method thereof. According to the modified wood fibre phase change energy storage material and the preparation method thereof, the pore diameters of wood fibres can be adjusted and controlled effectively, besides, porous structures of the wood fibres are improved, and the compatibility of the wood fibres and a phase change material is improved. The modified wood fibres are taken as a loading matrix of the phase change energy storage material; more phase change materials can be remained through the actions of hydrogen bonds, capillary force, intermolecular force and the like of the modified wood fibres, so that the enthalpy of phase change is improved; the modified wood fibres are combined with a fatty acid eutectic mixture, so that the requirement on low-temperature energy storage can be met; moreover, the phase change material prepared by the preparation method is degraded without heatin a phase change temperature range, which shows that the thermal stability of the modified wood fibre phase change energy storage material is high; and after 100 times of thermal cycle, the phase change material does not leak, which shows that the thermal reliability is high, and the thermal energy storage efficiency is high. The preparation method disclosed by the invention is simple in process;the wood fibres serving as the raw material are wide in source and low in cost; the raw materials do not need to be subjected to chemical treatment, and are environment-friendly and energy-saving, and the modified wood fibre phase change energy storage material has a wide application prospect in the field of solar energy utilization, building energy conservation and the like.

The invention discloses a polyethylene glycol-b-polytyrosine-lipoic acid copolymer, a polypeptide micelle and a preparation method and application thereof. The preparation method comprises the following steps: firstly, carrying out NCA ring opening polymerization and esterification reaction to prepare a PEG-PTyr-LA polypeptide copolymer; and carrying out self-assembly of the polymer to obtain themicelle which is small in grain size, high in stability and high in drug loading amount and has reduction responsiveness, wherein the method is simple and controllable, and the prepared polymer has high biocompatibilitya nd biodegradability. The micelle drug can be circulated for a long time in vivo and penetrates tumor cells better, so that enrichment of the drug at tumors is improved greatly, and therefore, growth of DMA-MB-231 breast carcinoma transplantation tumor is inhibited better.

The invention provides a preparation method of a trachea substitute. The preparation method comprises the following steps: eliminating antigens of an animal-derived tracheal tissue; compounding vascular endothelial growth factors (VEGF) with the outer wall of the trachea substitute; and compounding epidermal growth factors (EGF) with the inner wall of the substitute, wherein antigen elimination is carried out on a cartilage layer on the outer wall of a trachea and a lower muscular layer of a mucous layer on the inner wall of the trachea. The trachea substitute prepared by the method is derived from the animal tracheal tissue, has a specific C-shaped cartilaginous ring structure of a natural trachea, is formed by connecting compact connective tissues, has elasticity, can extend and contract longitudinally, and can moderately expand when gas passes through the substitute; and the prepared trachea substitute can keep the trachea unobstructed for a long time after transplantation, can notcollapse, and has good integration effect with a host without obvious rejection reaction. The preparation method has the advantages of simpleness, wide raw material source and low cost; and the medical cost can be reduced and the economic burden of patients can be lightened by means of large-scale industrial production.

The invention discloses a preparation method and applications of a biochar composite photocatalytic material, and belongs to the field of environmental functional materials. In the prior art, BiVO4 isa good photocatalytic material, and the affinity of BiVO4 to organic pollutants is not strong, such that the efficient degradation of organic pollutants is not easily achieved. According to the present invention, biochar is doped during the preparation of BiVO4, the biochar-BiVO4 composite material is prepared in the high pressure reaction kettle under the alkaline condition, rhodamine B is addedto the customized visible light reactor, and mass transfer is performed under the deuterium lamp light source by using the composite material as the catalyst; the results show that the composite photocatalytic material has the improved visible light absorption and can enhance the adsorption on organic pollutants by the catalytic material after the biochar is doped; and the composite material canimprove the adsorption on organic pollutants by the photocatalytic material and increase the utilization on visible light by the photocatalytic material so as to improve the photocatalytic degradationefficiency of the BiVO4 material on organic pollutants.

The invention relates to an ethylene glycol composition includes at least 99.0 wt% of ethylene glycol and 0.1-1000 wppm of ethylene carbonate. The invention mainly solves problems of single raw material source and high production cost in production of the ethylene glycol composition in the prior art. The invention provides the ethylene glycol composition, and especially, the ethylene glycol composition produced by hydrogenation on oxalate. The ethylene glycol composition can be used for preparing polyester resin, anti-freezing solutions and unsaturated resin, is wide in sources of raw materials, is low in production cost, and is high in quality of ethylene glycol composition.

The invention relates to the field of inorganic nonmetallic materials, in particular to a preparation method of a continuous ceramic fiber. The preparation method includes the steps: 1) preparing component A sol; 2) preparing silicon dioxide sol; 3) mixing the component A sol and the silicon dioxide sol to obtain two-phase sol, and adding spinning additives; 4) concentrating the two-phase sol added the additives, and spinning the sol by a dry method to obtain a gel fiber; 5) pyrolyzing the gel fiber to obtain a ceramic fiber; 6) sintering the ceramic fiber to obtain a continuous aluminum oxideceramic fiber. The preparation method of the continuous ceramic fiber has the advantages of low raw material cost, stable process and easiness adjustment. According to the method, main raw materialsare wide in source and cheap, and the method has an obvious advantage of cost as compared with a metal alkoxide hydrolysis method and a siloxane method. Stability and compatibility of metal sol and silicon dioxide sol are good, ceramic fibers with different contents of silicon dioxide can be prepared as required, and a technological adaptability is high.

The invention relates to a building foundation type sandy soil heat storage self-heating system which comprises a building foundation, an enclosing wall and a foundation type sandy soil heat storage self-heating system. The foundation type sandy soil heat storage self-heating system comprises a foundation type sandy soil heat storage device, a hot air duct, a cold air duct, a hot air louver and a cold air louver; the foundation type sandy soil heat storage device comprises a heat storage body, a heat exchange pipe buried in the heat storage body and air diffusers at both ends of the heat exchange pipe. The building foundation type sandy soil heat storage self-heating system has the characteristics of low heat storage cost, large heat storage capacity, high heat exchange efficiency, no energy consumption in the heating process, good performance of regulating and controlling heating power and the like. The system has the advantages of simple structure, safety, reliability, high stability, wide adaptability and the like and is a very ideal sandy soil heat storage self-heating system which is used for a single-layer or multilayer building in the northern area to utilize new energy, such as wind energy, solar energy and the like, to carry out heating.

The invention discloses a preparation method and application of degradable copolyester based on triethylene glycol, and belongs to the field of polyester synthesis. The method comprises the following steps: carrying out esterification reaction on monomers piperidine-1,4 dicarboxylic acid, 2,2'-bicinchoninic acid, triethylene glycol and a catalyst to obtain an esterification product; heating the esterification product for condensation polymerization to obtain a crude product of a condensation polymerization product; and finally, conducting extracting by a solvent, conducting precipitating by a precipitator, and conducting filtering and drying to obtain a target product. The weight-average molecular weight of the polyester obtained by the method disclosed by the invention is 20000-30000 g / mol. The copolyester synthesized by the method disclosed by the invention is relatively good in mechanical property and flexibility, easy to degrade by the environment and harmless to the environment. The degradable copolyester based on triethylene glycol prepared by the invention is used for preparing an antibacterial plastic matrix.

The invention relates to a method for preparing a delayed coagulation type super plasticizer through atom transfer radical polymerization. The method comprises the steps of with a delayed coagulationtype monomer and a carboxylic acid small monomer as main reaction raw materials, sequentially carrying out atom transfer radical polymerization (ATRP), alcoholysis and copolymerization so as to prepare the delayed coagulation type super plasticizer, namely that carrying out atom transfer radical polymerization (ATRP) on the delayed coagulation type monomer as a reactant under the system formed byan unsaturated initiator, transition metal halide and a ligand so as to obtain an unsaturated macromonomer, carrying out alcoholysis so as to obtain a delayed coagulation type macromonomer, and copolymerizing with the carboxylic acid small monomer, so as to obtain the delayed coagulation type super plasticizer. According to the method, a functional side chain consisting of delayed coagulation typestructural monomers is innovatively designed and synthesized by virtue of a controllable polymerization technical measure, a traditional polymer side chain structure is replaced, the super plasticizer presents excellent capacities of dispersing element purified slurry, and the coagulation time of the element purified slurry can be remarkably delayed, so that the later-period strength of concreteis improved, and multiple effects of high water reduction, slump resistance and delayed coagulation are achieved.

The invention provides a method for preparing a continuous alumina-based ceramic fiber, which relates to an alumina-based ceramic fiber, in particular to a method for preparing a continuous alumina-based ceramic fiber which takes alumina as a main component and adds a second component as a crystalling phase inhibitor. The invention provides a method for preparing the continuous alumina-based ceramic fiber, which is simple in technique and low in cost. The method comprises the steps: preparing alumina sol; preparing silicon dioxide sol; mixing the alumina sol and the silicon dioxide sol to obtain biphase sol, and adding a spinning addition agent into the biphase sol; condensing the biphase sol added with the addition agent and spinning by a dry method to obtain the gel fiber; pyrolyzing the gel fiber to obtain the ceramic fiber; and sintering the ceramic fiber to obtain the continuous alumina-based ceramic fiber.