602 results about "Colloid" patented technology

The invention relates to the technical field of preparation of medical supplies, in particular to a surgical membrane and a preparation process. During specific use, firstly, a polyurethane base membrane is selected and subjected to plasma treatment; spraying a nano SiO2 dispersion liquid containing a photoinitiator on the surface of the treated polyurethane base film, and then performing ultraviolet patterning irradiation to form a micro-bulge structure to obtain a base material layer; projecting the colloidal fluid to a temperature gradient mask through a digital micromirror device, so that the colloidal fluid is subjected to regional thermal polymerization on the substrate layer to form an intelligent adhesive layer with viscosity gradient; by adopting an aerosol jet printing technology, super absorbent fibers and polyvinyl alcohol-borax dynamic crosslinking hydrogel are co-deposited to form a drainage layer, so that the technical problems that a surgical membrane prepared by a surgical membrane preparation mode in the prior art is inflexible in adhesion and poor in surface structure performance, and a preparation process is difficult to accurately control are solved.

The application discloses a thickened oil viscosity reducer for a main viscosity contribution component of colloid and a preparation method thereof. The thickened oil viscosity reducer comprises the following components in percentage by weight: diethylene glycol methyl ether 25-35%, propylene glycol formate 15-25%, dispersant 5-8%, chelating agent 2-4%, anti-coking agent 0.5-1%, anti-swelling agent 1-2% and corrosion inhibitor 1-2%; and the balance is water. The application is a polar + non-aromatic hydrocarbon solvent system; completely avoids high-risk substances such as nonylphenol polyoxyethylene ether, petroleum sulfonate sodium and organic chlorine; is designed in pertinence and can effectively inhibit metal-induced asphaltene bridging; can withstand working conditions from normal temperature to 250 DEG C and up to 300 DEG C; thermal stability is significantly enhanced, and residual carbon after aging is lower than 8%; viscosity reduction efficiency is higher; the system is more stable, flexible in compounding and suitable for field construction.

The application discloses a preparation method of a catalyst for liquid-phase refining of crude octanol, and the preparation method comprises the following steps: (1) mixing pretreated fly ash and pseudo-boehmite, adding deionized water and nitric acid, stirring until a colloid is formed, drying the colloid, mixing the dried colloid with kaolin, and obtaining a carrier through kneading, extrusion molding, drying and calcination; (2) taking a nickel salt, a manganese salt and a zinc salt as active components, taking a calcium salt as an auxiliary component, dissolving the active components and the auxiliary component in deionized water to obtain a salt solution, adding n-hexane into the salt solution and stirring uniformly to prepare an impregnation solution, immersing the carrier in the impregnation solution, and obtaining the catalyst through washing, drying and calcination. The catalyst prepared by the method is mainly used in a liquid-phase refining reaction process of crude octanol, and has high activity stability and selectivity.

The present invention relates to a colloidal composition comprising unmodified, discrete cellulose microparticles, such as a colloidal emulsion or colloidal gel, a method of preparing the colloidal composition and uses of the colloidal composition and cellulose particles The colloidal composition comprises a continuous phase and a dispersed phase, wherein the continuous phase is a liquid; wherein the dispersed phase comprises cellulose microparticles which are dispersed in the continuous phase of the colloidal composition, wherein the cellulose microparticles have a mean average particle length of from 0.1 to 20 µm a mean average particle width from 0.05 to 1.3 µm, and a maximum thickness not exceeding 0.2 µm determined by scanning electron microscopy; and an aspect ratio of length / width of 1 to 25, and wherein the colloidal composition has a flow index n of ≤ 1 determined by a rheometer at NTP (normal temperature (25°C) and pressure (1 atm)).

The invention relates to the technical field of water treatment, and discloses a silicon powder conditioner and a preparation method thereof, the silicon powder conditioner comprises 20-40% of an inorganic coagulant, 5-15% of an organic polymer coagulant, 3-10% of a natural polymer coagulant aid, 10-25% of a demulsifier, 2-8% of a synthetic coagulant aid, and the balance of water. The demulsifying agent is compounded with various coagulants and coagulant aids, the demulsifying agent preferentially destroys an oil-water interfacial film, releases wrapped silicon powder and eliminates the'colloid protection 'effect of oil stains on the surface of the silicon powder, and the inorganic and organic coagulants rapidly perform electrical neutralization and adsorption bridging on exposed silicon powder particles to form floc which is good in settling performance and easy to filter. Meanwhile, the inorganic coagulant provides positive charges and efficiently neutralizes the microfine silicon powder with negative charges; cPAM with high molecular weight and PDADMAC with strong cations form long-chain bridging and patching effects, so that fine particles with the particle size of 1-5 microns are specially captured, and meanwhile, larger-particle silicon powder is improved to form floc which is easy to filter; the natural polymer further increases the volume and density of the floc, and prevents the floc from being broken under shearing.

The present invention provides a sulfonic acid-modified colloidal silica which has excellent long-term stability of metal adsorption amount and is capable of suppressing the amount of residual abrasive grains on a polished metal surface after polishing and cleaning.　This sulfonic acid-modified colloidal silica contains silica particles, and is characterized in that: (1) the surfaces of the silica particles are modified with a sulfonic acid group; (2) the Cu ion adsorption amount of the silica particles is 5.00-110.00 µmol / g; (3) the ratio (Cu ion adsorption amount (µmol / g) / S content (µmol / g)) of the Cu ion adsorption amount to the S content of the silica particles is 0.50 or more; and (4) the rate of change over time of the Cu ion adsorption amount of the silica particles is 1.30 or less as measured by the measurement method described below. [Measurement method of the rate of change over time of the Cu ion adsorption amount of the silica particles] The sulfonic acid-modified colloidal silica is left to stand at 25°C for 3 months. The Cu ion adsorption amount (µmol / g) of the silica particles before standing and the Cu ion adsorption amount (µmol / g) of the silica particles after standing are measured and the rate of change over time of the Cu ion adsorption amount of the silica particles is calculated by the following formula. (Rate of change over time of Cu ion adsorption amount of silica particles) = (Cu ion adsorption amount (µmol / g) of silica particles after standing) / (Cu ion adsorption amount (µmol / g) of silica particles before standing)

Provided is an aqueous inorganic coating agent capable of forming a coating film having high antifogging properties. [Solution] The aqueous inorganic coating agent comprises small-particle colloidal silica having an average particle diameter of 3 nm or more and 10 nm or less, large-particle colloidal silica having an average particle diameter of more than 10 nm and 100 nm or less, at least one of a sodium phosphate compound and a potassium phosphate compound, boric acid, and water.

The invention discloses a performance test method for high-precision filtered oil of steam turbine oil, and particularly relates to the technical field of lubricating oil testing, and the performance test method comprises the following steps: S1, constructing a closed-loop test system and preparing a reference oil sample, S2, injecting solid particles and soluble colloid pollutants in a programmed collaborative manner to simulate a dynamic pollution load, and S3, testing the performance of the high-precision filtered oil of the steam turbine oil. S3, multi-stage composite working condition circulation including high-temperature and high-flow, rapid cooling, pressure fluctuation and high-temperature and low-pressure stages is operated, and upstream and downstream particle distribution, moisture and pressure difference of filtered oil are monitored in real time; and S5, generating a comprehensive report containing the dynamic dust holding capacity, the efficiency curve, the performance influence coefficient and the simulated life. According to the invention, the comprehensive performance and long-term reliability of the filtered oil can be evaluated more truly and comprehensively.

The invention discloses a universal synthesis method of medium-entropy / high-entropy alloy nanoparticles and application of the medium-entropy / high-entropy alloy nanoparticles. Comprising the following steps: 1) dissolving three or more metal precursor salts in deionized water according to a required molar ratio, and carrying out ultrasonic treatment until the salts are completely dissolved to obtain a metal precursor solution A; (2) adding polyvinylpyrrolidone into the solution A as a stabilizer, and uniformly stirring; 3) under a stirring condition, slowly dropwise adding 0.3-0.5 M of a sodium borohydride solution as a reducing agent into the solution A to form a reaction solution B; (4) carrying out constant-temperature reaction on the reaction liquid B at 60-80 DEG C for 4-5 hours to form uniform nano-particle colloid; and (5) centrifuging, washing and freeze-drying the nano-particle colloid to obtain black powdery alloy nano-particles. The reaction temperature of the preparation method is 1t; 90 DEG C; the overpotential of the alloy nanoparticles in the HER is lt; 10mA / cm < 2 > at 30mV.

The application discloses a preparation method of structural stable porous starch, which comprises the following steps: adding a hydrophilic colloid into deionized water to prepare a solution, then adding starch, mixing uniformly to obtain a compound suspension, heating the compound suspension at a crystal starting melting temperature, then performing vacuum freeze drying, grinding and sieving to obtain melting coated starch, adding the melting coated starch into a citric acid-sodium phosphate buffer solution, mixing uniformly to obtain a starch-buffer solution suspension, adding an enzyme to perform oscillation reaction, adjusting the reaction solution to alkaline to terminate the reaction after the reaction is completed, then adjusting the reaction solution to neutral, finally performing centrifugation, washing, vacuum freeze drying, grinding and sieving to obtain the structural stable porous starch. The method has the advantages of simple process and low manufacturing cost, and the prepared porous starch has excellent adsorption, structural stability and thermal stability, and solves the problems of complex manufacturing process, long preparation time, poor structural stability of the prepared porous starch and limited pore forming effect in the prior art.

The application discloses a kind of high-stability two-phase colloidal ceramic ink material and preparation method and application thereof, the two-phase colloidal ceramic ink material is composed of ceramic colloidal suspension, polymer colloidal suspension, additive, the ceramic colloidal suspension is composed of ceramic, solvent, dispersing agent, binder;The polymer colloidal suspension is composed of water, surfactant, rheological modifier, colloidal stabilizer.The two-phase colloidal ceramic ink material provided in the application, ceramic powder colloidal suspension and polymer colloid two phases mutually adsorb and combine, and by surfactant adjust the wetting of polymer colloid on the surface of ceramic particle and the thickness and area of adsorption layer, form the micro colloidal structure of ceramic particle wrapped by polymer colloid and have excellent stability, can be stably stored at normal temperature for 3 months and above without the change of rheological property, and can be consistently formed process condition stable printing after 3 months.

The invention discloses a method for in-situ leaching mining of sandstone uranium ore, the concentration of bicarbonate radical ions in ore bed water in the sandstone uranium ore is lower than 0.5 g / L, the sandstone uranium ore comprises yttrium-containing uranium ore, and the carbonate content is 1.5%-2.5%; the ore bed water serves as a solvent, 500 mL of leaching agents with different pH values adjusted through sulfuric acid are prepared, and the concentration of hydrogen peroxide in the leaching agents is 2 g / L; and determining the maximum pH value when the uranium ore in the slice sample is corroded by using the leaching agents with different pH values, and taking the maximum pH value as a critical pH value. The leaching agent with the critical pH value is used for exploiting the sandstone uranium ore, corrosion to gangue minerals in the leaching process can be reduced, the number of formed colloids and CaSO4 precipitates is reduced, the precipitates are prevented from blocking an ore bed, in addition, the method can be used for target corrosion of the refractory uranium ore, and therefore efficient leaching is achieved.

The invention provides an organ perfusate and a preparation method thereof. The Na ion concentration of the organ perfusate is 110-130 mmol / L, and the K ion concentration of the organ perfusate is 20-30 mmol / L; the organ perfusate is prepared from 0.024 mmol / L to 0.036 mmol / L of a colloid osmotic pressure substance, 100 mmol / L to 103 mmol / L of an impermeable substance, 0.001 mmol / L to 0.025 mmol / L of a cell protecting agent, 23 mmol / L to 38 mmol / L of a buffering substance, 3.015 mmol / L to 8.06 mmol / L of calcium and magnesium inorganic salt, 2.5 mmol / L to 6.5 mmol / L of an antioxidant and the balance of an energy substrate. Wherein the molar osmotic pressure of the organ perfusate is 290-320 mOsm / kg, and the viscosity of the organ perfusate at a preset temperature is lower than 2.0 cP; the colloid osmotic pressure substance is Pluronic F-68; and the cell protective agent is thyroxine.

At least one embodiment of the invention provides a preparation method of sponge titanium, which comprises the following steps: pretreating bauxite tailings to obtain a first mixture; carrying out acid treatment on the first mixture, and filtering to obtain a second mixture; putting the second mixture into a reaction kettle containing an alkaline substance to react so as to convert the ferric titanate into titanate and ferric oxide or ferrous hydroxide to obtain a third mixture; carrying out suction filtration treatment on the third mixture to obtain a first solid phase and a first liquid phase, and drying and grinding the first solid phase; roasting the dried and ground first solid phase to form an iron elementary substance, and carrying out magnetic separation to remove the iron elementary substance; adding an acidic material into the first liquid phase for reaction to obtain metatitanic acid colloid, and washing the metatitanic acid colloid; the metatitanic acid colloid is subjected to calcination, chlorination reaction and replacement reaction in sequence to obtain the sponge titanium. The sponge titanium obtained through the preparation method is high in purity.

This invention discloses a method and system for classifying and assessing lubricating oil contamination levels, as well as a storage medium. The method includes the following steps: acquiring lubricating oil samples from multiple operating machines; preprocessing the lubricating oil samples to obtain samples to be tested; extracting metal particles and colloids from the samples to construct a contamination feature dataset; analyzing the viscous substance content in the contamination feature dataset to obtain the comprehensive correlation between the flow rate, velocity, and pressure of the lubricating oil sample, as well as the clogging risk threshold value of the viscous substance content; calculating the clogging risk probability value for each operating machine using the comprehensive correlation and the clogging risk threshold value; and analyzing the contamination source classification results of metal particle clogging in the operating machines using the clogging risk probability value. By classifying the contamination sources of metal particles, more targeted lubricating oil detection can be performed on the machines, identifying lubricating oil anomalies.

A method for improving drug solubility and a drug composite material having improved solubility. The method comprises preparing a silica colloidal suspension from silica nanoparticles having a diameter between 2 nm and 100 nm; rapidly evaporating a solvent by means of controlling the temperature and pressure, so as to obtain a porous surface material with ultra-high density silanol groups retained on the surface; and loading drug molecules. By controlling the size of nanoparticles and the density of silanol groups, drug molecules can be effectively adsorbed under anhydrous conditions, and rapidly desorbed and released in an aqueous environment.

The application discloses a kind of colloidal bodies with variable pore size and its preparation method, including nanoparticle modification, amphiphilic nanoparticle preparation and variable pore size colloidal body preparation and other steps, by specific setting to each step, so that the colloidal body prepared finally is stable and the pore size is variable, the hydrophobic polymer chain in the cavity inside colloidal body will produce corresponding collapse and stretch form under water / oil different medium environment, close or expose hole, meet the application requirement in selective medium transmission.

The application belongs to the technical field of metal heat treatment, and particularly relates to a continuous heat treatment device and method for a spinning pulley, which is aimed at the oxide scale carried on the workpiece which is easy to fall into the quenching liquid, and is mixed and suspended in the quenching liquid along with the sludge and colloid generated by the oxidation of the quenching oil, so as to cause the rapid accumulation of impurities in the quenching liquid, and thus frequent cleaning treatment of the quenching liquid is required, the heat treatment continuity is affected, and the workpiece heat treatment quality is affected. The following scheme is proposed, including a heat treatment frame. The continuous heat treatment device and method for the spinning pulley disclosed by the application have the effects of improving the heat treatment continuity and the workpiece heat treatment quality, the device can suck the quenching liquid in the sinking area of the workpiece in real time, so as to avoid the mixing and diffusion of the quenching liquid, thereby avoiding the rapid accumulation of impurities in the quenching liquid, and the sucked quenching liquid is rapidly treated and circulated, so as to ensure the long-time use performance of the quenching liquid.

The invention discloses a bio-based aviation fuel hydrodeoxygenation isomerization catalyst and a preparation method and application thereof, and belongs to the technical field of preparation of sustainable biological aviation fuel hydrogenation catalysts. The method comprises the following steps: uniformly mixing sodium silicate, ammonium salt and desalted water in a stirring kettle to obtain a colloidal substance A; mixing titanium tetraethoxy, acetic acid, ethanol and desalted water to obtain a colloidal substance B; the preparation method comprises the following steps: dropwise adding phosphoric acid into desalted water, adding pseudo-boehmite and silica sol, mixing and stirring, adding a template agent, crystallizing, cooling, filtering, washing and drying to obtain SAPO-31 raw powder; the preparation method comprises the following steps: stirring and mixing a colloidal substance A, a colloidal substance B and SAPO-31 raw powder, and then filtering, drying, roasting and crushing to obtain a composite carrier; adding the composite carrier into a nickel salt aqueous solution for dipping, and then drying and roasting to obtain the hydrodeoxygenation isomerization catalyst. The catalyst is applied to kettle type slurry bed hydrodeoxygenation and hydroisomerization reactions, and can effectively avoid occurrence of abnormal working conditions such as coking and temperature runaway of the catalyst.

The utility model discloses a glue leakage prevention type hot melt gluing mechanism. The glue leakage prevention type hot melt gluing mechanism comprises a mechanism base, a mechanism shell and a shell sealing cover, the utility model relates to the technical field of automobile production gluing auxiliary equipment, a gluing mechanism ensures that a to-be-coated colloid material is fully preheated and carefully stirred through a colloid heat-preserving stirring structure so as to achieve the state of uniform texture and excellent flowability, and then a quantitative colloid conveying structure is used for conveying the to-be-coated colloid material according to the actual use requirement. By means of the design, the glue is slowly conveyed into a glue gun of an operator, the coating amount of the glue is effectively saved, unnecessary waste and problems such as glue leakage are greatly avoided, and the working efficiency and the material utilization rate are improved.

The invention relates to a sample preparation method for EBSD detection of a MoSi target material, and the sample preparation method comprises the following steps: carrying out cutting, grinding treatment, mechanical polishing and chemical mechanical polishing on the MoSi target material in sequence to obtain a to-be-detected sample; a polishing solution adopted in the chemical mechanical polishing treatment comprises a basic solution, an acid solution and colloidal silicon dioxide, the polishing solution comprises 0.5-1 part by weight of the acid solution based on 100 parts by weight of the basic solution, and the concentration of the acid solution is 5-10 wt%; the MoSi target material sample prepared through the sample preparation method is smooth in surface, the roughness is as low as nanoscale, no obvious scratches exist, when the MoSi target material sample is used for EBSD detection, a diffraction Kikuchi zone is clear, the sample calibration rate reaches up to 90% or above, and a reliable detection sample is provided for research of microstructure characteristics of the MoSi material.

A composition comprises an aqueous dispersion of polymer particles, polymeric organic crosslinked microspheres, and colloidal silica particles. The composition is useful in coating compositions for exterior applications to achieve a balance of excellent dirt pickup resistance and durability performance under accelerated testing conditions.

The invention discloses a Yellow River raw water coagulation-sand filtration-ultrafiltration treatment system and method based on a composite filter material, and belongs to the technical field of water treatment. The device comprises a coagulation unit, a sand filtration unit and an ultrafiltration unit which are sequentially connected in the water flow direction. Wherein the sand filtration unit is filled with multiple layers of composite filter materials, and the composite filter materials sequentially comprise an aluminum ion modified quartz sand layer, an aluminum ion modified quartz sand layer and an aluminum ion modified quartz sand layer from top to bottom, the granular active carbon layer is used for deeply adsorbing and removing small molecular organic matters; and the manganese sand layer is used for catalytically removing iron and manganese ions and is used as a supporting layer for stabilizing the filter bed. The method comprises the following steps: carrying out coagulation treatment on Yellow River raw water, introducing the treated Yellow River raw water into the composite sand filtration unit, carrying out deep pretreatment, and filtering the pretreated Yellow River raw water through the ultrafiltration membrane. According to the method, through gradient filtration and function cooperation of the composite filter material, the synchronous removal efficiency of turbidity and UV254 can be remarkably improved, high-quality inlet water is provided for an ultrafiltration membrane, membrane pollution is effectively controlled, system operation energy consumption is reduced, and the method has the advantages of being low in resource consumption, little in environmental pollution, good in economic benefit and the like.

The present disclosure is directed to coating compositions that include about 10 wt. % to about 90 wt. % water, about 5 wt. % to about 80 wt. % of a binder, and about 0.1 wt. % to about 20 wt. % of a colloidal silica functionalized with anionic molecules and / or a colloidal silica functionalized with neutral molecules. The present disclosure also is directed to methods of making coating compositions of the present technology.

This invention belongs to the field of new materials and relates to a multi-compartment polysaccharide colloidal material and its preparation method driven by both aqueous phase temperature and pH. The method uses polysaccharides with an upper critical eutectic temperature or a lower critical eutectic temperature as wall materials. The non-covalent bonds, such as hydrogen bonds, formed between the polysaccharide and curcumin at the response interface serve as stabilizing forces. Initiated by both temperature and pH, and under continuous flow conditions, a multi-stage reaction pathway is employed to load weakly acidic, weakly basic, or amphoteric dissociative compounds into different compartments. Compared to traditional emulsion template methods, nanoprecipitation methods, or physical encapsulation methods, this invention does not require the introduction of surfactants or particulate templates, nor does it require organic solvents. The operation process is simple and controllable, possessing good structural applicability and potential for large-scale continuous preparation.

The present application relates to a kind of nano platinum colloids and its preparation method and its application, the average particle size of the nano platinum colloids is 50-100nm, D90 is 100-150nm, D10 is 30-70nm, zeta potential is-25mV to-40mV, pd I is 0.2-0.5, sphericity is 0.85-0.97.The nano platinum colloids prepared by the present application has small particle size, as catalyst has higher catalytic efficiency, can quickly capture hydrogen to occur reaction, is not influenced by hydrogen escape, is used in the detection reagent for determining the dissolved hydrogen concentration in water, reaction rate is fast, titration result is more accurate.

This invention discloses a method for preparing tin dioxide powder by freeze-drying to inhibit tin hydroxide agglomeration. The method involves adding a tin source solution (36-54 g / L) and a precipitant solution (5-30 g / L) at a mass ratio of 1:0.1-0.25 under constant temperature and magnetic stirring. The precipitant solution is then added dropwise to the tin source solution, reacting to form tin hydroxide colloid. After static aging, the colloid undergoes rapid cryogenic freezing to instantly freeze it into an ice state. The ice-state colloid is then subjected to low-temperature vacuum sublimation drying to obtain loose tin hydroxide dry powder. The dry powder is then calcined to obtain tin dioxide powder. This invention fundamentally eliminates the agglomeration of tin dioxide powder, resulting in tin hydroxide dry powder with an agglomeration rate of less than 10% and a purity of over 99.9%, providing a high-quality precursor for high-performance electronic-grade tin dioxide.

The invention discloses air flotation separation and carbon neutralization wastewater pretreatment integrated equipment, which relates to the technical field of wastewater treatment and comprises a buffer adjusting unit and a catalytic reaction unit which are communicated along the flow direction of wastewater. Through the synergistic effect of integrated buffer adjustment, two-stage air floatation and photocatalysis, the problem that nanoscale colloids are difficult to capture in a traditional air floatation process is effectively solved while the colloid redispersion phenomenon caused by wastewater pH fluctuation is overcome. Specifically, an acid-base environment of wastewater is stabilized through a buffer mechanism of an organic acid component, abnormal changes of charges on the surface of colloid are inhibited, full-scale capture of micron-scale suspended particles and nano-scale colloid is realized by combining dual effects of micron-scale bubble adsorption and reactive oxygen free radicals generated by electrolysis, and the colloid is deeply mineralized through photocatalysis, so that the adsorption efficiency of the colloid is improved. The colloid is effectively intercepted after being oxidized and destabilized, so that the risk that the colloid is re-dispersed due to fluctuation of environmental conditions in a subsequent process is avoided, and the interception effect of the nanoscale colloid in a wastewater pretreatment process is improved.

The environment-friendly technology for rubber paste production comprises the following steps that S1, pretreatment is conducted, specifically, waste water generated in the rubber paste production process enters a pretreatment pool to be pretreated, a grating and a screen are arranged in the pretreatment pool, and large suspended solids in the waste water are removed; s2, mixing reaction: introducing water into stirring equipment, adding a liquid medicine according to the quality of the wastewater, and rapidly mixing the liquid medicine with the wastewater through the stirring equipment to neutralize the pH value and the drug power in the wastewater. S4, precipitation: feeding the wastewater subjected to the mixed reaction into a precipitation tank, and standing for a certain time to obtain preliminarily clarified water. And S5, filtering: enabling the clarified water to pass through a filter tank, and intercepting residual fine suspended matters and colloidal substances. S6, disinfection: adding a disinfectant into the filtered water to kill pathogenic microorganisms such as bacteria and viruses in the water. The stirring equipment in the step S2 comprises a stirring tank, so that the liquid medicine can be quickly diffused in each layer and region of the water body.

The invention relates to the technical field of starch gelatinization, in particular to a bio-based adhesive as well as preparation and application thereof. The preparation method comprises the following steps: mixing starch, a gelling agent and water to obtain a mixture; wherein the gelling agent is organic polybasic acid; and then carrying out high-temperature treatment on the obtained mixture, and cooling to obtain the bio-based adhesive. The starch is converted from a powdery particle state to a colloid state, the crystal structure of the starch is destroyed, starch polysaccharide chain segments are irregularly arranged, and a viscous colloid dispersion system is formed. The solid starch particles are subjected to gelling treatment, so that the solid starch particles have good flowability and dispersity, and spreading on an interface of the material is facilitated. The bio-based adhesive provided by the invention can be further applied to the field of light chemical industry as an adhesive, an auxiliary agent, a polymer and the like, and has a good effect.