697results about How to "Improve adsorption capacity" patented technology

The invention discloses a preparation method of a composite separating film filled by an interpenetrating polymer network hydrogel. The preparation method comprises the following steps of firstly, soaking a polymer membrane into a first monomer solution, fetching out, radiating under ultraviolet rays, and crosslinking, so as to obtain a first network gel composite separating film; then, soaking the first network gel composite separating film in a second monomer solution, fetching out, and performing thermal-initiation crosslinking, so as to form the composite separating film filled by the interpenetrating polymer network hydrogel. The composite separating film filled by the interpenetrating polymer network hydrogel has the advantages that the function of adsorbing heavy metal ions is realized; the heavy metal ions in water can be effectively adsorbed in the filtering and separating process; the method is simple, the efficiency is high, the operation is easy, the cost is low, the industrial production is realized, and the property of adsorbing multiple metal ions of copper, lead, mercury, zinc, cadmium, nickel and the like is excellent; the preparation can be used for the treatment of industrial heavy metal sewage, and the removal of heavy metal ions in domestic drinking water.

The invention belongs to the field of high polymer materials, and provides a long-acting electrostatic holding meltblown polypropylene electret and a preparation method and an application thereof. Themeltblown polypropylene electret provided by the invention contains blended master batch and meltblown polypropylene; the master batch contains a matrix material, an electret filler, a modifier, a dispersing agent, a coupling agent and an antioxidant, wherein the matrix material is polypropylene; the electrets filler is tourmaline and/or a fluorine-containing polymer, and the modifier is a nucleating agent. The meltblown polypropylene electret provided by the invention is obtained by adding the master batch into the meltblown polypropylene for spinning and by passing through a corona electrets, and the obtained meltblown polypropylene electrets material is stable in charge storage, high in filtering efficiency and high in temperature resistance.

The invention discloses an application of a metal-organic framework functional material, and belongs to the technical field of water processing. A metal-organic framework material is subjected to pre-modification and post-modification, and a series of different functional groups are introduced to an organic ligand or an inorganic metal cluster of the material. The metal-organic framework functional material is used as an adsorbent for removing radioactive ions from nuclear waste. The metal-organic framework material containing sulfate radicals and sulfonate radicals has a preferable adsorption effect on 133Ba<2+>; the maximum removal rate can reach 99.9%; and adsorption equilibrium can be achieved in 5min. By using the functionalized metal-organic framework material, a simple, easy, efficient, and fast novel method is provided for removing 133Ba<2+> from the nuclear waste. The metal-organic framework functional material has significant industrial application value with respect to nuclear pollution management.

The invention discloses a transition metal or an alloy nanocluster catalyst and preparation method and application thereof. The invention prepares a supported transition metal or an alloy nanoclustercatalyst by a new method in which a transition metal or an alloy nanocluster which is synthesized by an alkali-polyol method and stabilized by solvent and simple ions is supported on a carbon or oxidecarrier. The content of the transition metal or alloy nanocluster in the catalyst is 0.1-50wt%, and the particle size is 0.7-5nm. The transition metal or alloy nanocluster in the catalyst is distributed on the outer surface or in mesopores and macropores of the carrier material, and the atoms on the surface of the metal or alloy nanocluster have high availability. The catalyst has good catalyticperformance on the hydrogenation of 2,3,5-trimethylquinone, and the catalytic activity of the prepared Pt/Al2O3 and Pt/C supported metal nanocluster catalyst on the hydrogenation of the 2,3,5-trimethylquinone is much higher than that of the corresponding commercially available catalysts.

The invention provides chitosan controlled release fertilizer microspheres and a preparation method thereof. The controlled release fertilizer consists of biodegradable chitosan, polyvinyl alcohol, sodium alginate and a chemical fertilizer. The preparation method comprises the following steps: dissolving chitosan in an acetic acid solution; dissolving the chemical fertilizer and polyvinyl alcohol in the chitosan acetic acid solution; adding an ion crosslinking agent to obtain microspheres; and putting the microspheres in a sodium alginate solution for ultrasonic vibration to form the chitosan controlled release fertilizer microspheres. In the process of crosslinking to form the microspheres, fertilizer molecules are adhered and wrapped in crosslinked network micropores of the chitosan microspheres, so that the solubility and releasing capacity of the fertilizer molecules are changed and nutrients are slowly released along with degradation of the chitosan microspheres. At the same time, a sodium alginate electrolyte membrane is wrapped on the surfaces of the microspheres, thereby reducing the burst release phenomenon of nutrients generated in the initial release stage. The controlled release fertilizer is simple in preparation process, relatively low in cost, environmentally friendly and non-toxic and suitable for industrial production.

The invention discloses a nano-titanium water-based coating having long-acting resistance to formaldehyde. The nano-titanium water-based coating comprises the following components by weight percentage: 20%-60% of film-forming base material, 0%-30% of pigment, 0%-40% of filler, 5%-20% of bamboo charcoal powder, 2%-10% of nano titanium, 1%-10% of additive and 10%-30% of water. Based on the good absorption performance of the bamboo charcoal powder in the coating, the water-based coating of the invention is capable of absorbing the formaldehyde released from the coating and decomposing the formaldehyde by using the nano-titanium, thus reducing the pollution caused by formaldehyde in a long-acting and effective way and improving the indoor air.

The invention relates to an application of vegetable sponge as adsorbent in metal ion adsorption. The vegetable sponge is derived from the fruit of loofah, and the natural adsorption material is obtained after the loofah is peeled off and the kernel is removed; the natural adsorption material can be directly used for absorbing the metal ions in solution, especially the water solution. The vegetable sponge has the advantages of wide source, capability of biodegradation, simple processing technology, ability to substitute synthetic macromolecular material and environmental friendliness.

The invention discloses a porous composite capable of adsorbing heavy metals ions and a preparation method and application thereof; the porous composite is prepared by introducing microorganisms to natural polymer material and synthetic polymers as materials; the preparation method includes the steps of 1), preparing a foam substrate; 2), performing microorganism culture and substrate foaming; 3), gelling the foam substrate; 4), purifying the porous material, and drying to remove small molecules hot crosslinked and microorganisms not immobilized to the substrate, lyophilizing after dialysis to obtain the porous composite capable of adsorbing heavy metal ions. The whole preparation process of the natural environment-friendly composite is simple, pollution-free and nontoxic, and the composite is biodegradable; the composite is reusable and biodegradable.

The invention relates to a nonwoven fabric lithium ion battery composite diaphragm and a preparation method thereof, the nonwoven fabric lithium ion battery composite diaphragm is provided with a three layer structure successively comprising a nonwoven fabric substrate layer, a nano ceramic layer and an electrostatic spinning nanofiber layer, or is provided with a five layer structure successively comprising a nonwoven fabric substrate layer, nano ceramic layers and electrostatic spinning nanofiber layers, wherein the nano ceramic layers and the electrostatic spinning nanofiber layers are arranged on both sides of the nonwoven fabric substrate layer; the nano ceramic layer and the nonwoven fabric substrate layer are bonded by pre polymer polymerization of nano ceramic layer ceramic powder as a polymerization site and a nonwoven fabric substrate layer contact site under uv irradiation, and the nano ceramic layer and the electrostatic spinning nanofiber layer are bonded by pre polymer polymerization of the nano ceramic layer ceramic powder as the polymerization site and a nano fiber layer contact site under uv irradiation. The nonwoven fabric lithium ion battery composite diaphragm has the advantages of high mechanical strength, high electrolyte retention rate high puncture strength, high diaphragm rupture temperature, uniform pore size distribution and the like, is an ideal power lithium ion battery composite diaphragm.

The invention discloses a preparation method of three-dimensional porous hexagonal boron nitride. The preparation method comprises steps as follows: step one, a precursor is placed into a crucible, wherein the precursor comprises a nitrogen source and a boron source, the nitrogen source is one or more of ammonia, urea, sodium azide, pyridine, melamine and ammonia borane, and the boron source is one of boron powder, boron oxide, boric acid, ammonium borate, sodium borohydride, boron carbide and ammonia borane; step two, the crucible is placed in a high-temperature furnace, vacuum pumping is performed to 1-40 Pa, gas is introduced and oxygen is eliminated; step three, the temperature is increased to 900-1,600 DEG C in 10 min-4 h, and a reaction is performed for 0.5-5 h; and the temperature is reduced to the room temperature, and three-dimensional porous hexagonal boron nitride is obtained. The preparation method of three-dimensional porous hexagonal boron nitride is simple in technology, complex raw material pretreatment and follow-up treatment are not needed, the repeatability is good, batch preparation can be achieved, and industrialized application is easy to achieve.

The invention discloses a heavy metal treating agent for soil. The heavy metal treating agent comprises the following components in percentage by weight: 30 to 40 percent of clay minerals, 30 to 40 percent of organic fertilizer, and 20 to 40 percent of algae. In the heavy metal treating agent for soil, the algae is a plant which lives in sea water for a long time, has good adsorption and fixing effect to heavy metals, can quickly adsorb the heavy metals in the soil when entering the soil polluted by heavy metals, and enables the heavy metals to loss bioactivity by combination effect of organic matters in the organic fertilizer, so that absorption of plants and animals to heavy metals can be reduced, beneficial elements in the clay minerals can be replaced through crystal replacement by utilizing the porous property of the clay minerals, and inactivated heavy metal elements can enter the clay minerals to achieve the effect of treating heavy metal polluted soil.

The invention discloses a preparation method of a Fe-Co bimetal multiphase Fenton-like catalyst taking modified sepiolite as a carrier, which relates to a preparation method of a catalyst, to solve the problems of narrow effective pH value range, low utilization ratio of hydrogen peroxide and easiness in generation of secondary pollution of iron ions of homogeneous Fenton. The preparation method comprises the following steps: (1) acidizing and activating sepiolite powder to obtain modified sepiolite; (2) preparing a mixed solution of ferric nitrate and cobalt nitrate, and adding urea to obtain a mixed solution; (3) heating the mixed solution and the modified sepiolite in a water bath for reacting, cooling and ageing to obtain a precipitate; and washing with water and drying to obtain a precursor of the catalyst, and calcining to obtain the Fe-Co bimetal multiphase Fenton-like catalyst. When the catalyst prepared in the invention is used, the pH value of water does not need to be regulated, so the range of the pH value is expanded, and the utilization ratio of the hydrogen peroxide is high; and meanwhile, iron ions can be slowly released to realize the synergistic effect of the iron ions and cobalt ions and speed up the reaction, so that organic pollutants which are difficult to biodegrade can be permanently and efficiently removed, and secondary pollution is difficult to cause.

The invention discloses bacteria immobilization particles for water purification and a preparation method of the bacteria immobilization particles, and belongs to the technical field of water treatment. The preparation method comprises the following steps: preparing a bacteria concentrate through flocculation by utilizing activated carbon, diatomite and a chitosan acetic acid solution; adding diatomite, bentonite, silicon dioxide and a polyvinyl alcohol-sodium alginate mixed solution into the concentrate for stirring; carrying out granulation with a granulator to prepare the bacteria immobilization particles. The prepared bacteria immobilization particles are high in biological activity, high in bacteria content (5*10<9>-1*10<10> CFU/g), short in starting time, and high in reaction speed, has a honeycomb structure (100-300 m<2>/g in specific surface area) suitable for bacteria apposition growth and mass transfer, and can be used for immobilizing bacteria for long, prohibiting the invasion of external hazardous materials, and permanently and efficiently treating sewage in different environments and of different water quality types; meanwhile, industrialized production is available for a whole bacteria immobilization particle preparation process, and the prepared bacteria immobilization particles are high in mechanical property, long in service life, and convenient to store and convey.

The invention discloses a method for preparing a thio-modified sepiolite heavy metal absorbent, which prepares thio-modified sepiolite adopting a gel process, stirring nature clay sepiolite serving as a substrate at a high speed to form gel, and adding mercaptopropyl silane, and comprises the following steps: 1) dispersing natural clay sepiolite in deionized water to form suspension of sepiolite;2) stirring the suspension of sepiolite in a dispersing machine at a high speed to obtain sepiolite gel; 3) adding mercaptopropyl trimethoxysilane under a high-speed stirring condition, and continuing high-speed stirring to form gel system of thio-modified sepiolite; 4) keeping the gel system at a constant temperature of 80 DEG C for 24 hours; and 5) taking the gel out of the gel system, drying at 65 DEG C, and grinding to obtaining the thio-modified sepiolite. The thio-modified sepiolite prepared by the method has high absorbability, high absorption speed, no secondary pollution, and wide application range; and the preparation method is simple, low in cost and suitable for large-scale promotion and use.

A graphene-iron oxide complex consists of graphene and needle-like iron oxide nanoparticles grown on a surface of the graphene, and a fabricating method thereof includes (A) preparing a reduced graphene dispersed solution, (B) mixing the dispersed solution with a solution containing iron oxide precursors to prepare a mixture, (C) stirring the mixture to prepare a graphene-iron oxide dispersed solution containing the graphene-iron oxide complex that needle-like iron oxide nanoparticles are grown on the surface of the graphene, and (D) separating the graphene-iron oxide complex from the graphene-iron oxide complex dispersed solution.

The invention discloses a preparation method of carbon nitride compound with high catalytic degradation activity and belongs to the technical field of photocatalyst preparation. According to the preparation method disclosed by the invention, tripolycyanamide, zinc nitrate hexahydrate and 2-methylimidazole are utilized as raw materials, and ZIF-8/g-C3N4 compound can be finally obtained through calcining and solvent heat treatment. Adsorption capacity of the synthesized ZIF-8/g-C3N4 compound to organic pollutants is enhanced; meanwhile, service life of electron-hole pairs is prolonged, transferof photo-induced electrons is promoted, catalytic degradation activity to the organic pollutants is higher under the simulated sunlight, a degradation rate is 3.03 times of that of original g-C3N4, and higher practical application value is achieved.

The invention relates to a method for preparing low-zinc vulcanized active agents by an active carrier method. Novel nanometer-grade dispersed clay is adopted to be used as a carrier, a small number of zinc ions are loaded after the organic activation of the carrier is modified so that the loaded zinc ions are enriched on the surface of the carrier, and after the full adsorption reaction, precipitating agents are dripped so that the zinc ions absorbed on the carrier are completely precipitated on the surface of the active carrier clay. The concentration of the zinc ions practically participating in the reaction is improved, and simultaneously, the dispersibility of the zinc ions is also improved. Because the concentration of the loaded zinc ions is low and only equals to that of the zinc ions practically participating in the reaction, the ZnO consumption in sizing materials can be obviously reduced. The method has the advantages that the process is simple, the zinc content of the prepared low-zinc vulcanized active agents is low, and the application performance is identical to that of zinc oxide.

The invention relates to a method for preparation of a hydroxyapatite nanorod and a nanowire by a hydrothermal process. The method includes: adding a water soluble calcium salt solution into a riboflavin sodium phosphate solution at a rate of 3-50ml/min, adjusting the pH of the obtained mixed solution to 8-12 or 4-6, then leaving the solution to undergo a hydrothermal reaction at 100-200DEG C for 1-48h, carrying out separation, washing and drying the precipitate, thus obtaining the hydroxyapatite nanorod and nanowire.

The invention discloses a method for solidifying sludge of an urban sewage treatment factory by using ardealite, coal ash and carbide slag. The dehydrated sludge of the urban sewage treatment factory is solidified by a solidifying agent prepared from common industrial solid waste such as ardealite, coal ash and carbide slag; the solidified sludge meets the embedding indexes (the transverse shearing intensity of 25 kN/m<2> and water content of 45 percent) specified in the Urban Sewage Treatment Factory Sludge Handling-Mixing and Embedding Sludge Quality (GBT23485-2009); the pollutant concentration of solidified sludge leachate meets the requirement specified in the Living Refuse Embedding Field Pollution Control Standard and can be embedded in a living refuse embedding field and used as covering soil in the embedding field or can be used for other building basic filling constructions.

The invention discloses a preparation method of a solid aluminum electrolytic capacitor, which aims at providing a preparation method that can reduce leakage current (LC) so as to improve the electrical property of the capacitor. The preparation method comprises the following steps: after going through formation and carbonization treatment, a well-winded core package is subjected to forming liquid restoration treatment technique and can also be subjected to carbonization treatment for a plurality of times and formation treatment for a plurality of times; carbonization treatment can improve the adsorption effect of impregnation liquid, increase the density of polymer, improve conducting effect and reduce ESR. Repeated formation can better restore the damage of an oxide film caused by foil cutting, nail rolling and carbonization, and reduce leakage current of the capacitor.

The invention relates to a method for preparing chitosan-ferric oxide composite absorption arsenic removal material, belonging to the technical field of water treatment. Based on the preparation of chitosan aquogel, gel balls of the chitosan aquogel are taken as matrix which is loaded with ferric oxide, and crosslinking treatment is carried out, so that the novel organic and inorganic composite material which is the chitosan-ferric oxide composite absorption arsenic removal material can be obtained. The composite absorption arsenic removal material has large adsorption capacity, high adsorption efficiency, strong adsorption selectivity and acid resistance as well as convenient solid-liquid separation, thus being an environment-friendly material which can be easily obtain and has low price and better application prospect.

The invention discloses a method for preparing a dewatering oil absorption silicon carbide ceramic felt and relates to a ceramic fiber felt. According to the dewatering oil absorption silicon carbide ceramic fiber felt prepared by the method, the phenomena of melting and aging under severe conditions such as high temperature and acid and alkaline are avoided, the technology is simple, the specific surface area is large, the adsorption efficiency is high, the fiber felt is light and soft, has good strength and toughness, and the preparation method can be used repeatedly in the water treatment field. The method comprises the following steps of: (1) preparing silicon-containing polymer solution, (2) electrostatic spinning, (3) thermal treatment and (4) surface treatment.

The invention discloses a composite functional fluorine-removing resin, which belongs to the field of resins. The resin is based on styrene-divinylbenzene resin, the structural unit is , contains functional groups -NH2 and -SO3-X (Fe/Al), the particle size is 0.3-0.5mm, and the saturated adsorption capacity for F- is 2.16~8.10mg/g. The preparation method is: take styrene-divinylbenzene resin as the matrix, add 60-80% concentrated nitric acid and 75-98% concentrated sulfuric acid to react at 40-80°C, and stir for 0.5-3 hours to obtain the loaded nitro Resin R-NO2; use dichloroethane as swelling agent, add 80-98% concentrated sulfuric acid to react at 70-120°C, stir and react for 8-16 hours to get nitro-sulfonic acid resin R-NO2 -SO3H; at 60-100°C, add SnCl2·2H2O, concentrated hydrochloric acid, ethanol, and reflux for 8-16 hours to obtain amino-sulfonic acid resin R-NH2-SO3H; at 20-60°C, add 0.1-1.0 mol/L iron salt or aluminum salt solution, stirred and reacted for 18-30 hours, and the composite functional fluorine removal resin R-NH2-SO3-X (Fe/Al) modified by amino groups and supported by metals was prepared. The composite functional fluorine removal resin prepared by the invention can be used for high-efficiency and deep fluorine removal.

The invention discloses an aluminum plating non-stretching polypropylene film with aluminum layer peeling intensity enhancement type, which is composited by a heat sealing layer, a sandwich layer and a corona layer; wherein, the heat sealing layer uses ternary polymerization polypropylene; the sandwich layer uses HOPP; the corona layer uses the blended materials of the ternary polymerization polypropylene and ethylene/methylmethacrylate. The invention also discloses a preparation method of the aluminum plating non-stretching polypropylene film with the aluminum layer peeling intensity enhancement type. The aluminum plating non-stretching polypropylene film of aluminum layer peeling intensity enhancement type draws into a surface active material ethylene/methylmethacrylate in the corona layer, thus increasing the adsorption capability of the corona layer on the aluminum layer and having high aluminum layer peeling intensity performance which can not be exceeded by the common aluminum plating non-stretching polypropylene film.

The invention discloses a preparation method of graphene hydrogel, which includes following steps: adding a reducing agent to a graphene oxide solution for ultrasonic dispersion; heating the reaction system to carry out a reaction; and washing a reaction product after the reaction finished to obtain the graphene hydrogel. In the invention, a macroscopic form material, graphene hydrogel, in a three-dimensional network structure is assembled and formed with the graphene as a framework, so that problems of nano agglomeration and layer stacking among the layers of the graphene, thereby greatly increasing the specific surface area of the material and enhancing the adsorption effect of the material. The preparation method is easy to perform, is carried out with common reducing agents and under relative mild conditions to prepare the graphene hydrogel in a reduction manner, is decreased in preparation cost, is free of environmental pollution, is free of obviously dangerous raw materials and is suitable for large-scale commercialized production.

The invention relates to a method for detecting melamine based on mesoporous silica nanosphere/tris(bipyridyl) ruthenium solid-state electrochemiluminescence. The method is characterized by comprising the following steps: a, preparing mesoporous silica nanospheres; b, preparing a mesoporous silica nanosphere/tris(bipyridyl) ruthenium/Nafion modified electrode; c, detecting melamine by using the mesoporous silica nanosphere/tris(bipyridyl) ruthenium/Nafion modified electrode; and d, adopting an electroluminescence detection device to acquire optical signals produced by an electroluminescence detector, and carrying out a computer data processing to obtain the melamine content. According to the method of the present invention, the mesoporous silicon (mSiO2) material has a large surface area and a large pore volume, and the mesoporous silica nanosphere/tris(bipyridyl) ruthenium/Nafion modified electrode can be effectively used for melamine detection through electrochemiluminescence (ECL).

The invention relates to modified graphene for efficiently adsorbing methyl orange dye. According to the modified graphene, water-soluble chitosan quaternary ammonium salt is grafted to the surface of graphene oxide by using the electrostatic function of a non-covalent bond, the graphene oxide is reduced by using a chemical reduction method, and meanwhile the chitosan quaternary ammonium salt is retained on the surface of graphene; specifically, the modified graphene is prepared by firstly, ultrasonically dispersing graphene oxide into sodium hydroxide solution so as to obtain a graphene oxide dispersion liquid, subsequently adding into a chitosan quaternary ammonium salt solution, and mixing and stirring; adjusting the pH value of the mixed liquid by using the sodium hydroxide solution, adding a reducing agent hydrazine hydrate, and heating to obtain black flocculent precipitate, performing suction filtration, washing and drying. The modified graphene provided by the invention is good in dispersity in water, with the combination of the electrostatic function of the chitosan quaternary ammonium salt and the synergistic effect of the large specific surface area of graphene, methyl orange in a solution can be effectively removed, the adsorption property is high, the adsorption is stable, and the dye wastewater treatment efficiency is improved.

The invention relates to a gasoline desulfurization adsorbent and preparation and application thereof. A preparation method of the gasoline desulfurization adsorbent comprises the following steps of: mixing a zinc salt, a VIII family non-precious metal salt, other salts and a precipitant in a proton-containing polar solvent, and undergoing a precipitation reaction at the temperature ranging from the room temperature to 15 DEG C to obtain a sulfur storing agent; and soaking a soluble salt containing a VIB and/or VIII family transition metal into a molecular sieve carrier containing gamma-Al2O3to obtain an octane number restorative, wherein the gasoline desulfurization adsorbent comprises 5-50 percent by mass of molecular sieve, 5-80 percent by mass of zinc oxide, 1-30 percent by mass of VIB and/or VIII family non-precious metal and 5-50 percent of other bonding agents; the sulfur storing agent and the octane number restorative can be combined for using by mixing, soaking, performing deposition sedimentation and co-precipitating, and can be used separately; and the absorbent can be used for adsorbing almost all sulfides in gasoline to obtain ultra-low-sulfur even sulfur-free gasoline while the octane number is kept to be constant or be increased slightly.

A hot spray process for preparing the coated layer of nano-class powder includes such steps as cleaning the surface of substrate, activating, nano-class roughening, and hot spray of nano-class powder by large-diameter spray gun. The resultant coated layer features high mechanical properties, simple process, high deposition rate of powder and high spray efficiency.

The invention discloses a bast fiber fabric with a protective function and a preparation method thereof. The preparation method comprises the preparation steps of bast fiber pretreatment, oxidation treatment, chitosan acetic acid solution preparation, chitosan-modified oxidized bast fiber fabric preparation, chitosan-modified oxidized bast fiber fabric composite finishing through tea polyphenol and the like. According to the preparation method, bast fiber is selectively oxidized through periodic acid or periodate, a generated active group aldehyde group -CHO can generate an imidization reaction with chitosan containing -NH2, chemical bonding is generated between the aldehyde group and chitosan containing -NH2 under the condition that no cross-linking agent or other chemical additive is used, therefore, the tea polyphenol adsorption capacity of the fabric in the subsequent finishing process is enhanced, combination between tea polyphenol and the bast fiber is promoted, and the condition that other reagents are used in the tea polyphenol function finishing process is avoided. The bast fiber fabric has the good multifunctionality such as the antibacterial property, the wrinkle resistance and the ultraviolet resistance; the preparation technology of the bast fiber fabric is simple and convenient to operate, clean production is achieved in the preparation process, and the requirements of ecological textiles are met.