1373 results about "Ultrasound - action" patented technology

A device and method for lancing a patient, virtually simultaneously producing and collecting a small fluid sample from a body. The device comprises a blood collection system including a lancing needle (16), drive mechanism (11), kneading or vibration mechanism (25), optional suction system (7), and sample ejection mechanism. The device is preferably sized to be hand-held in one hand and operable with one hand. The device can optionally contain integral testing or analysis component (83) for receiving the sample and providing testing or analysis indication or readout for the user. A method involves piercing the skin at a rapid rate, kneading the surrounding area by ultrasonic action, piezoelectric or mechanical oscillation to stimulate the blood flow from the wound, drawing the fluid using a pumping system.

An ultrasound oral hygiene and therapeutic device comprises an array of ultrasonic transducers, a power generator, and a filling element. The ultrasonic transducer array, with optional radiation plates and reflection plates, produce uniform ultrasound radiation on each surface desirable to be treated by ultrasound radiation. The soft and resilient filling element snugly fits into a user's oral cavity, confines cleaning solution and the ultrasound action within a limited ultrasound action zone surrounding the surfaces desirable to be treated, and protects all other parts of the oral cavity from ultrasound radiation. The device provides superior, uniform, and consistent cleaning results in a short time. In particular, it cleans the entire dental surface, including the inter-dental and gingival areas. It is extremely easy to use, quiet, durable, energy efficient, and inexpensive in long run.

A device and method for lancing a patient, virtually simultaneously producing and collecting a small fluid sample from a body. The device comprises a blood collection system including a lancing needle (16), drive mechanism (11), kneading or vibration mechanism (25), optional suction system (7), and sample ejection mechanism. The device is preferably sized to be hand-held in one hand and operable with one hand. The device can optionally contain integral testing or analysis component (83) for receiving the sample and providing testing or analysis indication or readout for the user. A method involves piercing the skin at a rapid rate, kneading the surrounding area by ultrasonic action, piezoelectric or mechanical oscillation to stimulate the blood flow from the wound, drawing the fluid using a pumping system.

A method for demulsifying water-oil emulsions through ultrasonic action, comprises a step of making the water-oil emulsions flow through at least one ultrasonic acting region in a flow direction, wherein: within the ultrasonic acting region, a concurrent ultrasonic wave whose traveling direction is the same as the flow direction of the water-oil emulsions is generated by at least a one first ultrasonic transducer provided at the upstream end of the ultrasonic acting region, and at same time, a countercurrent ultrasonic wave whose traveling direction is opposite to the flow direction of the water-oil emulsions is generated by at least a one second ultrasonic transducer provided at the downstream end of the ultrasonic acting region; and the concurrent ultrasonic wave and the countercurrent ultrasonic wave act simultaneously on the water-oil emulsions which flow through the ultrasonic acting region, so as to demulsify the water-oil emulsions. After being demulsified, the water-oil emulsions gravity settle and separate, or settle and separate under an electric field, so as to be dewatered. The present invention can apply to various water-oil separating technologies in the procedures from mining to processing of crude oil.

An ultrasound oral hygiene and therapeutic device comprises an array of ultrasonic transducers, a power generator, and a filling element. The ultrasonic transducer array, with optional radiation plates and reflection plates, produce uniform ultrasound radiation on each surface desirable to be treated by ultrasound radiation. The soft and resilient filling element snugly fits into a user's oral cavity, confines cleaning solution and the ultrasound action within a limited ultrasound action zone surrounding the surfaces desirable to be treated, and protects all other parts of the oral cavity from ultrasound radiation. The device provides superior, uniform, and consistent cleaning results in a short time. In particular, it cleans the entire dental surface, including the inter-dental and gingival areas. It is extremely easy to use, quiet, durable, energy efficient, and inexpensive in long run.

The invention discloses an optical fiber extrinsic Fabry-Perot interference ultrasonic sensing and detection device, comprising a 1550nm light source, a 1550nm optical circulator, an optical fiber Fabry-Perot ultrasonic sensor, a photoelectric transition module, a signal amplification module, an oscillograph, a piezoelectric transducer and a signal generator. The basic structure of the optical fiber Fabry-Perot ultrasonic sensor is composed of a single mode optical fiber, a quartz vibrating membrane, an outer ceramic bushing, an inner ceramic bushing and a metal base. The light emitted by the 1550nm light source reaches the optical fiber Fabry-Perot ultrasonic sensor through the optical circulator, when ultrasonic wave acts on the ultrasonic sensor, as the light reflected by the optical fiber Fabry-Perot ultrasonic sensor is modulated by the ultrasonic signal, the reflected light reaches the photoelectric conversion module by the circulator and then is converted into an electric signal, and the ultrasonic signal can be observed by the oscillograph after amplification. The invention has simple structure, easy manufacture, low cost and high sensitivity, strong practicability, easy encapsulation and is convenient for mass production, and can be applied to related fields of industrial detection, power system safety and the like.

A supersonic chemical preparation method for grapheme quantum dots relates to a preparation method for grapheme quantum dots, and especially relates to a method for preparing a grapheme quantum dot solution with the characteristics of good monodispersity and luminescence performance using a simple and environmentally friendly process with cheap carbon black or graphite powder as the raw material. The preparation method provided in the invention is characterized by adding a dispersant into carbon black or graphite and obtaining grapheme quantum dots under the action of supersonic wave. The grapheme quantum dot solution prepared in the invention has the characteristics of luminescence, monodispersion, water-solubility, etc.

The invention relates to a method for carrying out surface modification on waste fly ash and leading the waste fly ash to become an absorbing material with high absorption capacity and sterilization performance, and the method comprises the following steps: mixing the fly ash of 20 meshes with solution of an inorganic acid modifier (mixed solution that HCl: H2SO4 is equal to 1:3) according to the solution-ash ratio of 3: 1, and obtaining the partially modified fly ash under the ultrasonic action; and using a silane coupling agent for processing the surface of the fly ash, and further utilizing the reaction activity of the silane coupling agent for carrying out the further graft reaction, thereby preparing the absorbing material with immobilized polyquaternary ammonium salt sterilization performance and higher absorption capacity.

The invention discloses a nano-pore SiO2 aerogel heat-insulating composite material and a preparation method thereof. The nano-pore aerogel heat-insulating composite material comprises SiO2 aerogel, an infrared opacifier and reinforced fibers. The preparation method comprises: mixing silicasol and indium-tin oxide ITO nano alcohol slurry or nano composite alcohol slurry of ITO and TiO2 through supersonic wave action, mixing the mixture and the reinforced fibers, directly pouring the mixture into a die to form a wet gel complex, and performing supercutical fluid drying. The material has good heat transfer function and good obstructing function on solid heat conduction, air heat convection and infrared radiation heat conduction, simultaneously has good hydrophobicity, simple technique, low cost and wide application scope, has the mechanical strength reaching more than 1.2 MPa, and can be used in situations with higher heat protection requirement in the fields of avigation, spaceflight, military affairs and domestic use.

The invention belongs to the technical field of electromagnetic wave shielding material and relates to a low-silver-loaded electromagnetic wave shielding fabric preparation method, comprising the following specific steps: modifying the surface of polyester fabric, introducing an active group--sulphydryl under the premise of not increasing the surface area of the fabric, and then plating silver with ultrasonic wave; wherein, Ag-S chemical bond is formed between sulphydryl and silver so that the compactness of the silver coating and the adhesion force of the fabric substrate are increased; in the process of chemical plating, fresh plating solution is always on the surface of the fabric and the materials which are absorbed on the surface of the fabric through physical adsorption are removed timely owning to the action of ultrasonic wave so that the continuity and compactness of the silver coating can be improved further; the silver loading content of the prepared silver-loaded electromagnetic wave shielding fabric is 6.7-7.0% by weight; the fabric is more resistant to the corrosion of the air and water, the electromagnetic shielding effectiveness is more than 32dB in the range of 0.01-18GHz, namely the anti-electromagnetic radiation rate is more than 99.9%; the fabric can be widely used in electromagnetic wave antiradiation clothes and in the field of electromagnetic wave shielding for special departments such as military, national defense and the like.

The nano modified polymer-based waterproof roof paint incldues polymer emulsion as base material, calcium carbonate, talcum and mica as stuffing, characterized inorganic nano particle and sodium-base montmorillonoid as modifier. The production process includes dispersing the inorganic nano particle as modifier in the base material under the action of ultrasonic wave, adding sodium-base montmorillonid through high speed stirring for inserting compounding; adding stuffing while stirring, grinding and filtering. By means of the composite modification, the paint of the present inventino has excellent mechanical performance and waterproof performance and excellent uvioresistant capacity, and may be used to prolong the service life of roof obviously.

The invention discloses an aerogel thermal insulation composite material containing an infrared opacifier of nanometer semiconductor antimony tin oxide (ATO) or aluminum zinc oxide (AZO) and a method for preparing the same. The aerogel thermal insulation composite material comprises the components of SiO2 aerogel, the infrared opacifier which is nanometer ATO or nanometer AZO particles, and reinforcing fiber. Silicasol and ATO or AZO nanometer alcohol slurry can be mixed together through mechanical agitation or ultrasonic action, and the mixture flows to a fiber felt or fiber prefabricated part through a seepage process to form a wet gel complex to further perform supercritical fluid drying. The aerogel thermal insulation composite material has good thermal conductivity and good barrier effect on solid heat conduction, air heat convection and infrared radiation heat transfer, and has good hydrophobicity, simple process and low cost simultaneously; the mechanical strength of the material can reach 0.10 to 2 MPa; besides, the aerogel thermal insulation composite material has wide application range and can meet the applications in occasions with higher thermal protection requirements for aviation, aerospace, military and civil use.

The present invention discloses a three-phase ultrasonic photo-catalyzed reaction device and a CO2 reducing method with the device. With the device, a photo-catalyst is placed in a photo-reactor, and the reactor is placed in a water bath of an ultrasonic generator. A light source is arranged above the photo-reactor. The method is that the CO2 gas to be reduced is mixed evenly with the photo-catalyst and a sodium hydroxide solution in the photo-reactor under the ultrasonic action, and reacts for 3-20 hours with radiation of the light source. Then the CO2 gas is reduced. The photo-catalyst is made from titanium dioxide or silicon dioxide and metal phthalocyanine. Metal phthalocyanine is supported on the surface of titanium dioxide in the way of in-situ synthesis, sol-gel, and immersion. The present invention promotes the photo-catalysis efficiency, reduces the reaction time, and saves the energy. Visible light can be used for reducing. Moreover, the phot-catalyst can be recycled, which reduces the pollution and the cost, sot the present invention is quite applicable for the three-phase ultrasonic photo-catalyzed reaction device and photo-catalyzed CO2 reducing.

The invention relates to a method for preparing a flexible carbon nano tube transparent conductive thin-film material and an electrodeposition device, which are suitable for preparing uniform, high-transparency and high-conductivity flexible transparent conductive thin films. The method comprises: dispersing carbon nano tubes in aqueous solution by using an anionic surfactant under the action of ultrasonic waves, centrifuging the solution, using supernate as a plating solution and adding ammonia to make the plating solution alkaline; uniformly depositing the carbon nano tubes dispersed in theplating solution on a polished surface of a stainless steel electrode by using an electro-deposition method to obtain uniform carbon nano tube thin films with a thickness of 20 to 200 nanometers; andtransferring the carbon tube thin films to the surface of a flexible and transparent polymer substrate to form flexible, transparent and conductive thin films. The electrodeposition device mainly comprises an adjustable stabilized direct current power supply and a rectangular electrophoresis tank with a stainless steel inert electrode plate, wherein carbon nano tubes deposits on a polished positive plate to form films. The method and the electrodeposition device are simple and easily controllable in process parameters and can be used in large-area and continuous preparation of flexible, transparent and conductive films.

The invention relates to a preparation method of a graphene oxide / amphoteric chitosan intercalation composite for sewage treatment. At present, the dewatering effect of a cationic type polymeric flocculant is limited. The preparation method has the steps of oxidizing graphite by virtue of concentrated sulfuric acid, sodium nitrate and potassium permanganate to prepare graphene oxide; modifying chitosan by virtue of chloroacetic acid and a quaternization reagent to obtain amphoteric chitosan; and then under the action of ultrasonic waves, realizing intercalation compounding of the graphene oxide and the amphoteric chitosan, and carrying out dispersion to obtain a graphene oxide nanometer ion dispersion liquid. According to the preparation method, by virtue of an intercalation method, controllable dispersion of a graphene oxide sheet layer and grains is realized; as being provided with active groups of carboxyl groups, hydroxy groups, quaternary ammonium groups and the like, the surface of the graphene oxide in a dispersed state can adsorb suspended pollutants in wastewater; and the graphene oxide / amphoteric chitosan intercalation composite can be applied to wastewater treatment and has the advantages of little dosage, high efficiency and low water content of sludge, and the preparation method has the characteristics that the preparation technology is unique, equipment is easily botained, and the operation is simple.

The invention relates to a preparation method of a formaldehyde-free active dye fixing agent. The compound prescription of the active dye fixing agent consists of two components, component 1 is chitosan quaternary ammonium salt produced by 3-chlorine-2-hydroxypropyl trimethyl ammonium chloride grafted with chitosan under ultrasonic, and component 2 is reactive fixing agent produced after reaction of one weight part of triethylene tetramine and three weight parts of epoxy chloropropane; the mass ratio of the component 1 and the component 2 is 1:3. The method of the invention can be applied to fixing treatment of cotton fabric dyed by active dye, can improve rubbing fastness, washing fastness and light fastness of the fabric without influence on the chromatic light and the fabric hand feel; the prepared fixing agent which is free from formaldehyde, nontoxic and environment-friendly is a novel printing and dyeing assistant.

The invention discloses a washing method of monocrystalline / polycrystalline silicon chips, comprising the following steps of: firstly immersing the silicon chips into deionized water for rough washing under the action of ultrasonic waves; then removing into an inorganic base dilute solution for soaking; then immersing into the deionized water for washing under the action of the ultrasonic waves; then immersing into a flowing inorganic base solution for base washing under the action of the ultrasonic waves; then immersing into flowing deionized water for washing again under the action of the ultrasonic waves; then immersing into the flowing deionized water again for rinsing under the action of ultrasonic waves at room temperature; and finally drying the silicon chips. The monocrystalline / polycrystalline silicon chips washed by the washing method have high surface cleanliness.

A process for preparing nano-class or submicron-class carbon aerogel powder includes such steps as uniformly dispersing resorcin-formaldehide solution in insoluble oil phase under ultrasonic action while heating for gel polymerizing reaction, separating, washing, and carbonizing.

The invention discloses a felt proofing machine-washing finishing method for wool fabric. Under the effect of ultrasonic waves, the wool fabric is subjected to chlorination pretreatment to realize mild scale stripping treatment, and then the wool fabric is subjected to enzyme treatment to realize controlled scale stripping treatment under effect of the ultrasonic waves, so that the inside and outside uniformity of yarns of which the wool surface is subjected to scale stripping is effectively increased. The chlorination pretreatment is combined with the enzyme treatment, so that the longitudinal scale stripping uniformity of fibers is effectively increased, therefore the felt proofing effect of the wool fabric is achieved, and the machine-washing purpose of wool textiles is realized. Meanwhile, the reaction in the method is carried out in a scale layer, so that the damage on intercellular substances of the inner layers of the fibers is reduced, and the wearing performance and the durability of the wool textiles are increased.

The invention relates to environmental chemistry, in particular to a method for decolorizing coking wastewater by using synergetic effect of zero-valent iron / ultrasonic waves, which specifically comprises the following steps: wastewater and zero-valent iron chips / powders are added into a reactor; the pH value of the wastewater is adjusted to be 1 to 6; then stirring is carried out under the effect of the ultrasonic waves with the power of 150 to 200W; the reaction is lasted for 30 to 60 minutes; the wastewater is decolorized and COD is removed. During the process, the use amount of zero-valent iron in each liter of wastewater is 2 to 500g, and the reaction temperature is 10 to 80 DEG C. By applying the method for decolorizing coking wastewater by using synergetic effect of zero-valent iron / ultrasonic waves, the chromaticity of the coking wastewater can drop from 1,500 times to 140 times, and the removal efficiency can reach over 90 percent; in addition, after the synergetic effect of the zero-valent iron and ultrasonic waves, the removal efficiency of COD in the coking wastewater is higher than the efficiency under the signal effect of the zero-valent iron and the ultrasonic waves. The obtained BOD5 / COD is increased from 0.08 to 0.36, and the biodegradability of the wastewater is also increased remarkably.

The invention discloses a nano-hole aerogel heat-insulating composite material and a preparation method thereof. The nano-hole aerogel heat-insulating composite material comprises SiO2 aerogel, ITO nano powder material or nano compound powder material of ITO and TiO2, and reinforced fiber felt or prefabricated body. Through action of ultrasonic wave, silicon gel and ITO nano alcohol slurry or nano compound alcohol slurry of ITO and TiO2 are mixed and then flow into the fiber felt or the prefabricated body through infiltration technology to form wet gel compound to be subjected to supercritical fluid drying. The material has good heat transfer and obstruction functions for solid heat transfer, air heat convection and far infrared radiation heat transfer, has good hydrophobic property at the same time, and has simple process and low cost; the mechanical strength can reach 0.10 to 2MP; and the material has wide application range, and can meet higher requirement of heat protection in navigation, spaceflight, military affairs and civilian use.

The invention discloses a method for preparing nano silicon dioxide coated by nano titanium dioxide, which is implemented by firstly dripping inorganic acid in silicate solution under the conditions of stirring and ultrasonic, controlling pH, reaction temperature and time of a reaction system to obtain white silicic acid collosol, drying to obtain silicic acid gel, then mixing the silicic acid gel with water followed by bal milling, rinsing and filtering to obtain gel, hot decomposing the silicic acid gel to obtain silicon dioxide powder; secondly, mixing the silicon dioxide powder with a mixed solution of glacial acetic acid, water and absolute alcohol under the conditions of stirring and ultrasonic; and thirdly, adding mixed solution of Tetrabutyl orthotita and absolute alcohol to the mixture, standing, drying and ball milling the mixture to obtain silicon dioxide powder coated by titanic acid gel, then heating for decomposition to obtain composite material powder. The grain diameter of the composite material of silicon dioxide coated by nano titanium dioxide is 1-100nm and the purity thereof is over 99.8%.

The invention discloses a method for preparing nanoscale zero-valent iron and nanoscale Cu / Fe particles. The method comprises the steps of dropwise adding KBH4 or NaBH4 aqueous solution into soluble ferrite aqueous solution under the condition of adopting ultrasonication and continuously stirring with nitrogen introduction, wherein the amount of substance ratio between KBH4 or NaBH4 and soluble ferrite substances is 2-4:1; continuously stirring after dripping, completely reacting to acquire nanoscale zero-valent iron particles; separating, washing and storing; adding CuSO4 or CuCl2 aqueous solution into the nanoscale zero-valent iron particles, wherein the amount of substance ratio between CuSO4 or CuCl2 and the soluble ferrite substances is 1:11-19; stirring and reacting to prepare nanoscale Cu / Fe particles. The high-dispersing type nanoscale zero-valent iron and nanoscale duplex metal Cu / Fe prepared by the method can be used for simultaneously repairing chlorinated organic compounds, nitrate and heavy metal polluted water. The preparation method is simple, and rapid in speed; through the cavatition effect of ultrasonic wave, the dispersion is completely accelerated, and the agglomeration is reduced; the high-dispersing type nanoscale zero-valent iron and nanoscale duplex metal Cu / Fe with smaller grain size, larger specific surface area and higher reactivity can be prepared.

The invention provides a method for preparing a carbon nanometer paper enhanced conductive polymer matrix composite material, which is intended to solves a problem that integral mechanical properties and electroconductivity of a current carbon nanotube composite material cannot completely reaches engineering application requirements. Multi-walled carbon nanotubes or single-walled carbon nanotubes and graphene oxide are dispersed in a plasma aqueous solution under action of supersonic waves by an anionic surfactant, after high speed centrifugation, a supernatant liquid of the carbon nanotubes and graphene oxide solution is obtained, and flexible carbon nanometer paper with thickness of 10-100mum can be prepared as an enhanced material by a vacuum filtration method. The carbon nanometer paper enhanced conductive polymer matrix composite materials can be prepared by an RTM forming or vacuum bag method, and conductivity can be raised by raising the content of the carbon nanotubes and dispersion uniformity of carbon nanotube grids in the composite material, wherein the conductivity of the nanocomposite can be raised in several orders of magnitude, and can reach 1-200S / m, thereby making the polymer matrix composite materials go into a semiconductor conductive material field from an insulator.

An arc-ultrasonic welding method for Ti alloy features that an arc-ultrasonic exciting source using electric arc as heat generater and ultrasonic emitter is parallelly connected with the conventional power supply used for arc welding. The ultrasonic waves can act on the molten bath on the workpiece to be welded to improve the smelting and crystallizing procedure of Ti alloy for finer crystal grains and higher welding strength and fatigue resistance.

The invention provides a method for improving the activity of zinc powders with supersonic and a devide as well as applications thereof, wherein, the method leads the zinc powder to always keep fresh and active surface under solution environment condition that the zinc powder is taken as reducing agent, the alkali-typed zinc salt passivation film on the surface of the zinc powder can be removed by the supersonic. The supersonic has the frequency of 15-60 kHz and the sound intensity of 1-1000w / cm2; the ultrasonic cavitation reaction time on the zinc powder is 1-45 minutes. Under the effect of supersonic, common ZnSO4 solution containing 100mg / L of cobalt can reduce the cobalt content to 0.8mg / L within 30 minutes. The device provided by the method of the invention improves the zinc powder activativity with the supersonic and comprises at least a reaction chamber where ZnSO4 solution is fully filled; at least a supersonic emitter and at least one mixing device are dipped and arranged in the reaction chamber. The applications of the method at least comprise a technique of cobalt removal with antimony salt and a technique of cobalt removal with antimony trioxide.

The invention discloses a preparation method of nano-titanium dioxide coated nano-aluminium oxide, which comprises the following steps: firstly, dropwise adding an alkaline solution in an aluminium salt solution under the conditions of stirring and ultrasonication, controlling the pH value of a system, and still standing to acquire aluminum hydroxide sol; drying the aluminum hydroxide sol, mixing the aluminum hydroxide sol and water, ball milling, washing the mixture with water until eluate is neutral, filtering by decompression or centrifugalizing, and thermally decomposing to acquire nano-aluminium oxide powder; secondly, adding the nano-aluminium oxide powder into a mixed solution of glacial acetic acid, water and absolute alcohol to acquire the mixture under the conditions of ultrasonication and stirring; adding the mixed solution of butyl titanate and absolute alcohol into the mixture under the conditions of ultrasonication and stirring, still standing, drying and ball milling to acquire the powder; and placing the powder into a furnace at constant temperature, and thermally decomposing to acquire the nano-titanium dioxide coated nano-aluminium oxide powder. The grain diameter of nano-titanium dioxide coated nano-aluminium oxide composite material grains is 1-50 nm, and the purity is higher than 99.8 percent.

The invention discloses a method and device for preparing lithium hexafluorophosphate through dynamic crystallization. The method includes the following steps of 1, ultrasound induced nucleation, wherein a lithium hexafluorophosphate solution is cooled to minus 10-minus 15 DEG C within 2-3 hours under the action of ultrasonic waves, and a crystallization solution A is obtained; 2, stirring and crystallization, wherein the crystallization solution A is crystallized while being stirred at the cooling rate of 2-3 DEG C / h, and lithium hexafluorophosphate suspension liquid is obtained; filtering and drying are conducted, and the lithium hexafluorophosphate is obtained. According to the method, at the early stage of crystallization, ultrasound induced nucleation is adopted so that the lithium hexafluorophosphate can be subjected to homogeneous nucleation in a supersaturated interface stability zone; gradient cooling crystallization is achieved at a certain cooling rate under the stirring condition along with change of the concentration of the lithium hexafluorophosphate, so that crystal nucleus grows gradually, and a product with even particle size is obtained; the purity of the obtained product reaches 99.99%, the particle size is 40-120 meshes, the whole crystallization process only needs 6-13 hours, wall hanging does not occur easily in the crystallization process, and good economic benefits and social benefits are achieved.

The invention discloses a preparation method of a Fe-doped oxyhalogen bismuth nanometer material. The method comprises the following steps of respectively preparing an ethylene glycol solution of pentahydrate bismuth nitrate and a water solution of halite and iron nitrate nonahydrate; at the room temperature, dripping the obtained water solution into the ethylene glycol solution; using the ultrasonic effect as an auxiliary measure to take reaction; finally, washing, drying and cooling obtained precipitates to obtain the Fe-doped oxyhalogen bismuth nanometer material. The preparation method has the advantages that the one-step synthesis process of the Fe-doped oxyhalogen bismuth nanometer material can be realized under the room-temperature condition; high-temperature and high-pressure conditions are not needed; the reaction conditions are mild; the reaction time is short; the energy is saved; the consumption is reduced; the related synthesis process is simple; the raw material cost and the production cost are low; the repeatability is good; the preparation method is suitable for industrial popularization and application.

The invention discloses a preparation method of composite fiber of cellulose nanometer fibrils / alginate. The method includes steps of evenly dispersing cellulose nanometer fibrils under ultrasound wave function, and preparing aqueous suspension; then evenly mixing with alginate solution and obtaining the mixed solution of cellulose / sodium alga acid as spinning raw liquid; spinning by wet method and obtaining the composite fiber of cellulose nanometer fibrils / alginate. The preparation method is simple and easy to operate, the technique is green and environmental-friendly; the prepared composite fiber of cellulose nanometer fibrils / alginate is an environment-friendly recycled material, and has the same excellent biocompatibility and biological degradability as the pure alginate fiber; the oriental controllability of cellulose nanometer fibrils is enhanced, and the cellulose nanometer fibrils and the base alginate are formed to be an interpenetrating polymer network structure, thereby effectively improving the intensity and flexibility of composite fiber and greatly improving the adaptation of alginate fiber in textile and garment and medical treatment health domain.