1112 results about "Diethylenetriamine" patented technology

The invention discloses a method for synthesizing a novel amphoteric slow-breaking quick-setting asphalt emulsifier, belonging to the technical field of organic chemical synthesis. The method comprises the following steps of: reacting oleic acid with polyamine to generate acid amide polyamine, and then adding chloroactic acid to generate halogenating reaction to prepare the asphalt emulsifier, wherein the polyamine is the mixture of diethylenetriamine and triethylene tetramine. The water solubility of the hydrophilic radical of the emulsifier synthesized by the process is stronger than those of like emulsifiers, thereby obviously lowering the critical micelle concentration (CMC) value, and the particles of the produced asphalt emulsion are finer, smoother and evener. The emulsifier can effectively prevent asphalt from settling, increases the storage stability of the asphalt emulsion, reasonably regulates the charge ratio, widens the selectivity on stone materials in the application of slurry seal construction, enables the mixing time to be sufficient, and has obvious quick-setting effect and improved project quality.

The invention relates to organic-inorganic hybrid ultraviolet cured paint for metal surface protection. The paint comprises the following components in percentage by weight: 10 to 25 percent of epoxy modified silicon dioxide gel-resin, 15 to 30 percent of bisphenol-A epoxy acrylic ester, 5 to 15 percent of urethane acrylate, 35 to 45 percent of reactive diluent, 2 to 5 percent of toughener, 4 to 6 percent of photoinitiator, 0.5 to 0 percent of addition agent, wherein the epoxy modified silicon dioxide gel-resin is prepared by hydrolyzing a mixture of ethyl orthosilicate and gamma-glycidoxy propyl trimethoxy silane by a sol-gel method first and then adding diethylenetriamine. The paint film formed after the curing of paint has good strength, hardness, flexibility and strong acid and base resistance. The invention solves the problems that the organic-inorganic hybrid paint has high requirement on curing and common ultraviolet cured paint has poor adhesive force and flexibility when cured on metal base materials.

The invention relates to a carbon nitride/titanium dioxide nanosheet array heterojunction photocatalyst and a preparation method, belonging to the technical field of photocatalysis of nanometer materials. The catalyst is prepared through the following steps: with g-C3N4 as a carrier, titanium isopropoxide as a titanium source, diethylenetriamine as a morphology controlling agent and isopropanol as a solvent, performing a solvothermal method so as to prepare a g-C3N4/TiO2 precursor, and carrying out calcination treatment so as to obtain a g-C3N4/TiO2 nanosheet array heterojunction composite photocatalyst for the first time. The heterojunction composite photocatalyst shows pure and significantly-improved photocatalytic hydrogen production activity to g-C3N4 and anatase TiO2 nanosheet mesoporous spheres in a photocatalytic hydrogen production reaction. The preparation method has the advantages of simple and convenient operation, easy control, greenness, environmental protection and good application prospects. The series of catalysts has multilevel structure; and a g-C3N4/TiO2 nanosheet array heterojunction structure is formed through vertical and staggered growth of anatase TiO2 nanosheets with regular shape and uniform size on the surface of g-C3N4. The catalyst has excellent photocatalytic hydrogen production activity, good stability, high repeatability and facilitation large-scale production.

The invention discloses concrete with the functions of crack resistance and infiltration resistance. The concrete comprises the following raw materials in part by weight: 70-100 parts of cement, 400-500 parts of macadam, 50-70 parts of river sand, 40-50 parts of fly ash, 30-60 parts of mine residues, 5-20 parts of coal slack, 20-50 parts of basalt fibers, 5-15 parts of polypropylene fibers, 5-20 parts of glass fibers, 6-13 parts of expanded perlite, 20-80 parts of nanometer silicon dioxide, 5-15 parts of nano calcium carbonate, 1-3 parts of sodium dodecyl sulfate, 3-6 parts of zinc stearate, 2-5 parts of zinc borate, 3-7 parts of sodium citrate, 0.5-1.4 parts of acetyl tributyl citrate, 0.7-1.3 parts of diethylenetriamine, 3-10 parts of a water reducing agent, and 80-100 parts of water. The concrete disclosed by the invention has the advantages of good crack resistance, excellent infiltration resistance and good durability.

This invention relates to an antirust agent for reinforced concrete. The antirust agent is composed of: sodium molybdate 0.01-0.05 wt.%, diethylenetriamine 0.9-4.5 wt.%, allylthiourea 0.08-0.19 wt.%, 1,4-butynediol 0.15-0.75 wt.%, and water as balance. The antirust agent can effectively alleviate and prevent the rusting of the steel bars in the reinforced concrete, as well as alleviate or inhibit the damage to the passivated film of the steel bars by chloric ions. Besides, the antirust agent has such advantages as low application amount.

The invention discloses a method for preparing graphene aerogel and application thereof, and relates to the technical field of graphene materials. The method includes steps of uniformly mixing graphene oxide dispersion liquid and amine curing agents with one another to obtain graphene oxide mixed liquid; hermetically heating the obtained graphene oxide mixed liquid to obtain the graphene aerogel. The amine curing agents are one type of or a plurality of types of diaminodiphenyl-methane, diamino diphenyl sulfone, diethylenetriamine, triethylenetetramine, diethylaminopropylamine and m-phenylenediamine. The graphene aerogel prepared by the aid of the method can be applied to epoxy resin, so that graphene aerogel/epoxy resin composite materials with high conductivity and excellent mechanical properties can be obtained. The method and the application have the advantages that the graphene aerogel prepared by the aid of the method is internally of a uniform macroporous structure and is high in porosity; the amine curing agents are adopted in preparation procedures, accordingly, the epoxy resin interface bonding can be improved, and the conductivity and the mechanical properties of the epoxy resin can be enhanced.

The present invention relates to a thermal storage and insulation microcapsule for a building material and a preparation method thereof. An inner wall material employs toluene diisocyanate and polyethylene glycol as a polymerization monomer, which wraps a core material via interfacial polymerization; and an outer wall material employs toluene diisocyanate, diethylenetriamine, ethanediamine or piperazine as a polymerization monomer, which wraps an inner nuclear shell via interfacial polymerization. Capsule wall of the thermal storage and insulation microcapsule of the invention has advantages of thermosetting property, high mechanical strength, and improved abrasion resistance and durability.

The invention discloses an oxidized graphene material modified by a water-soluble anthraquinone compound and a preparation method of the graphene material and belongs to the technical field of water treatment of environmental engineering. The mass percent of the water-soluble anthraquinone compound in the material is 1-5%. The preparation method comprises the following steps: dispersing oxidized graphene into de-ionized water; adjusting the pH (Potential of Hydrogen) to 9-11 by using ammonia water; adding diethylenetriamine and reacting under a water bath condition at the temperature of higher than 95 DEG C; drying to obtain amino-modified graphene powder; dispersing the amino-modified graphene powder into a mixed solution of dichloromethane and absolute ethyl alcohol with the volume ratio of not more than 1 to obtain a mixed system in which the mass volume percent of the amino-modified graphene is 0.1%; and adding a dichloromethane solution of an anthraquinone compound containing a sulfonyl chloride radical and reacting at a room temperature. The material has a very good catalytic performance and the anaerobic organism conversion speed of organic matters which are difficult to degrade can be improved; the secondary pollution problem to the environment, caused by the loss of the water-soluble anthraquinone compound, is solved.

The invention discloses a preparation method for a modified walnut shell cation adsorbent, belongs to the field of modified adsorbent material preparation, and particularly relates to a preparation method for the modified walnut shell cation adsorbent used for adsorption removal of anionic dye in printing and dyeing wastewater. According to the preparation method, waste materials such as walnut shells are used as raw materials; in an alkaline environment, epichlorohydrin is used as an etherifying agent, diethylenetriamine is used as a crosslinker, modifying is performed in two steps and amino groups are introduced, and the poly-amino-contained modified walnut shell cation adsorbent is prepared in a compound mode. Experiment results show that walnut shells modified through the method can absorb anionic azo dyes to the capacity of 500 mg/g, and the adsorption capacity is nearly 9 times the adsorption capacity of non-modified walnut shells. The modified walnut shell cation adsorbent is wide in raw material source, high in mechanical strength, good in chemical stabilization, low in costs, easy to regenerate, simple in modifying method, applicable to the field of printing and dyeing wastewater treatment and high in removal rate, reliable and efficient and has an extremely good prospect.

The invention relates to an oilfield inhibitor. The invention is characterized in that the inhibitor is made by compounding imidazolines quaternarized and modified product and organic phosphonate copolymer according to a proportion of (1.5-2) to (0.8-1.2); wherein, the imidazolines quaternarized and modified product is synthesized by industrial organic acid, diethylenetriamine, xylene and nitrogen compounds according to chemical dose reaction; the organic phosphonate copolymer is synthesized by organic amine, aldehyde and inorganic phosphide according to chemical dose reaction. Because the molecular structure (the molecular structure of the quaternarized imidazolines and the phosphonate) of oilfield inhibitor contains polarity groups (namely hydrophilic group) of strong absorption performance, the invention not only can prevent the corrosion caused by H2S and SRB, but also can prevent the corrosion caused by CO2 and uneven scaling; the inhibiting performance is excellent and the cost is low.

The invention discloses a carbon nano point with the high fluorescence quantum efficiency and a preparation method thereof, belongs to the field of nano material science, and solves the technical problems in the prior art of high cost, operation complication, and time and labor consumption in the preparation method of the carbon nano point, and low fluorescence quantum efficiency and poor water solubility of the prepared carbon nano point. The carbon nano point disclosed by the invention takes a polycarboxylic acid or polyhydroxy compound as a carbon source, or amino acid as the carbon source, and diethylenetriamine as a surface for passivating and modifying; the carbon nano point can be prepared by using the processes of low-temperature pyrolyzation, precipitating and washing, dialysis and separation, and freezing and drying. The carbon nano point disclosed by the invention is simple in preparation method, and low in cost and and the large-scale production is convenient to carry out; the prepared carbon nano point is in a solid state, convenient to store, good in water solubility, high in fluorescence quantum efficiency (88.6%), stable in fluorescent property, wide and adjustable in range of emission wavelength, good in biocompatibility, and low in toxicity, and contains a large quanity of functional groups, so that the further derivation is facilitated; the application range of the carbon nano point in the fields of organisms, medicine and the like can be broadened.

The invention relates to a preparation method and application of an amphoteric chelate sorbent containing agricultural straw. The sorbent is brownish-yellow solid powder, the nitrogen content is 10.83wt%, and the specific surface area is 12.93m<2>/g. The sorbent is prepared by taking agricultural straw, epoxy chloropropane and monochloroacetic acid as raw materials, taking trimethylamine or triethylamine as a grafting reaction agent and taking ethylenediamine, diethylenetriamine or triethylenetetramine as a cross-linking agent. The method of the invention has the advantages of simple production processes, economy, practicability, reproducibility and the like and can be suitable for large-scale production. The sorbent prepared by the invention has the characteristics of good stability, good adsorption effect, wide application range and the like, can be widely applied to treatment of waste water containing heavy metal ions, and has better treatment effect.

A color fixating agent without formaldehyde is prepared from diethylenetriamine (AE) and epoxy chloropropane (EP) through adding water and AE to reactor, stirring, dropping EP at temp lower than 50 deg.C, heating to 55-65 deg.C, holding the temp for 0.5-2 hr, heating to 75-90 deg.C, holding the temp for 20-40 min while reacting, measuring viscosity and cooling.

The invention provides a polyurea micro capsule and the preparing method thereof. The preparing method comprises the following steps:(1) Add the organic phase with diphenylmethane diisocyanate into the water phase which contains surface promoting agent and agitate, emulsificate to obtain the latex A; (2) Add the diethylenetriamine into the water solution which contains surface promoting agent to obtain the continuous phase solution B; (3) Add the continuous phase solution B into the latex A to rouse the interface polymerization reaction on the oil and water interface to obtain the suspension which contains the polyurea micro capsule. The method of the invention adopts the diphenylmethane diisocyanate and has a small toxicity and volatilization, and has small influence to the environment and the experiment operation. The invention can add the diethylenetriamine directly after the latex is formed; therefore the invention has quick and utterly reaction, a high efficiency and can reduce the cost. The invention adopts the one step directly reaction and the temperature can be controlled in room temperature; and the invention needs no other temperature rising, therefore the whole process has a low energy consumption.

The invention provides a compounded imidazoline corrosion inhibitor. Raw materials of the compounded imidazoline corrosion inhibitor comprise oleic acid, diethylenetriamine, a quaternizing agent and a compound, wherein the complex is potassium pyroantimonate. The compounded imidazoline corrosion inhibitor is obtained through a step of reacting oleic acid with diethylenetriamine to obtain an imidazoline intermediate, a step of reacting the imidazoline intermediate with the quaternizing agent to obtain an imidazoline quaternary ammonium salt corrosion inhibitor, and a step of compounding by adding the compound. The invention also provides a preparation method of the compounded imidazoline corrosion inhibitor. The complex and the corrosion inhibitor are compounded to form the compounded imidazoline corrosion inhibitor, so the synergistic effect allows the compounded imidazoline corrosion inhibitor to have the advantages of increased corrosion inhibition efficiency, low production cost and simple preparation technology.

The invention discloses a modified polyurethane color fixing agent of basic ion, which is prepared by PEG600, PPG2000, TDI, DMPA, methyl ethyl ketone, calcium trisodium diethylenetriamine pentoacetate, epichlorohydrin, acetone, isopropanol, sodium bisulfite, water and glacial acetic acid. The process for preparation comprises polyurethane prepolymerization reaction, modified chain extending reaction, blocking reaction, emulsion reaction, removing solvent and the like. The modified polyurethane color fixing agent of ion of the invention can form net-shaped cross bonding with woven fabric, and the invention adopts sodium acid sulfite to be blocking agent, which guarantees that when in application, enough isocyanate bonds are supplied to form chemical crosslinking with hydroxyl group and carboxy group with cloth surface, the invention improves various color stabilities of dyed fabric, meanwhile, the invention keeps soft hand feeling of fabric.

The invention discloses a modifier for a black metal surface matrix. The modifier comprises the following raw material components in part by weight: 7 to 9 parts of aminotriacetic acid, 7 to 9 parts of lauric acid, 5 to 7 parts of malic acid, 3 to 5 parts of sorbic acid, 0.3 to 0.5 part of diethylenetriamine and 78 to 90 parts of water. A production method for the modifier comprises the following steps of: putting the water into a reaction kettle, then putting the aminotriacetic acid into the reaction kettle, fully stirring the water and the aminotriacetic acid till full dissolution, putting the lauric acid, the malic acid, the sorbic acid and the like into the reaction kettle respectively, fully stirring the components uniformly and melting the mixture, raising the temperature to be between 60 and 70 DEG C, keeping the temperature constant, reacting and chelating the melt for 1 hour at the constant temperature with stirring, then standing and performing natural complex reaction for 1 hour, finishing chelating when the solution is converted into a clear substance, obtaining a modifier finished product, and discharging, packing and selling the product. The modifier can be used for a long term; and the production method does not need discharge, only needs to continuously add raw agents, does not produce acid mist, acid gas or sour, does not drain waste water, and has no environmental pollution. The modifier enhances black metal facilities and equipment, and high-temperature resistance and oxidation corrosion resistance of products reaches over 2 times; and the modifier enhances the friction impact resistance of the black metal by over 2 times, and has quite considerable economic benefit and wide application.

The invention discloses a method for preparing ethylene diamine from ethanolamine and ammonia serving as raw materials under a hydrogen condition. A reaction system consists of the ethanolamine, the ammonia, hydrogen and a catalyst, wherein the reaction temperature is 100 to 190 DEG C, the reaction pressure is 6.0 to 25.0MPa, the molar ratio of the ammonia to the ethanolamine is 1-20 and the molar ratio of the H2 to the ethanolamine is 0.008-0.05, and the air speed of the ethanolamine liquid is 0.1 to 1.5h-1; the catalyst takes Al2O3 or SiO2 as a carrier and one or more of Ru, Ni, Pd, B, Fe, Co, Re and Cu as carried active components; and the ethanolamine and the liquid ammonia can be transformed into the ethylene diamine (EDA) in high activity and high selectivity, along with by products such as diethylenetriamine (DETA), a piperazine (PIP), an aminoethylpipe (AEP), a hydroxyethylpiperazine (HEP), a hydroxyethyl ethylene diamine (AEEA) and the like under the hydrogen condition and the action of the catalyst.

The invention discloses an AuNC (gold nanocluster) and CD (carbon quantum dot) composite fluorescent probe. The AuNC and CD composite fluorescent probe comprises BSA (bovine serum albumin) functionalized AuNCs (BSA-AuNCs) and fluorescent CDs in the mole ratio being 1:(1-5), wherein the BSA-AuNCs are prepared from a chloroauric acid solution, a BSA 4 solution and an NaOH solution through a reaction, and the fluorescent CDs are prepared from citric acid, diethylenetriamine and acetone through a reaction; the BSA-AuNCs and the CDs constituting the multifunctional composite fluorescent probe have specific recognition response to Hg<2+> and Cr<6+> respectively, when the BSA-AuNCs and the CDs constitute the multifunctional composite fluorescent probe, fluorescence emission of the BSA-AuNCs and fluorescence emission of the CDs are not affected mutually, respective probe detection results are undisturbed, the probe has higher sensitivity and selectivity, and respective detection of different kinds of ions and distinctive effects when two kinds of ions exist simultaneously are realized.

The invention discloses a method for the preparation of a cation fatty acid softening agent, comprising the following steps of: heating stearic acid to a melting state, adding diethylenetriamine into the melting liquid of the stearic acid to obtain a mixed liquid of the diethylenetriamine and the stearic acid, and adding a catalyst to subject the mixed liquid to an amide condensation reaction; adding an alkylating reagent into the products of the amide condensation reaction so as to implement an alkylation reaction; and adding a non-ionic surfactant and polyvinyl pyrrolidone into the products of the alkylation reaction and then cooling to obtain the cation fatty acid softening agent. The invention improves the softness by employing the alkylating reagent that is cationically stronger than acetic acid, enhances whiteness by the addition of the polyvinyl pyrrolidone, and uses the non-ionic surfactant in the process of the preparation so that the obtained softening agent can be used in one-bath with an anionic auxiliary agent so as to overcome the defects of the prior art, therefore, a cation fatty acid soft-flake softening agent having good hand feeling, high whiteness and low yellowing is obtained.

The invention discloses a method for preparing a 3-aminopropyl-trimethoxy-silane-diethylenetriamine-pentaacetic-acid/polyvinylidene-fluoride chelation film. 3-aminopropyl-trimethoxy-silane, diethylenetriamine pentaacetic acid, dimethyl sulfoxide, polyvinylidene fluoride and the like are used as main reagents; the 3-aminopropyl-trimethoxy-silane and the diethylenetriamine pentaacetic acid generate covalently bonding reaction at certain temperature; blending cast liquid is prepared by adopting a physical blending/phase transferring technology; and the chelation film is prepared by scraping or dragging the blending cast liquid. The method is easy to operate and low in cost; the preparation temperature is low; the produced chelation film has a good blending effect; and heavy metal pollutants can be effectively removed from waste water.

The invention belongs to the technical field of water treatment, and particularly relates to an adsorbent for removing metal ions and a dye. The method is characterized in that lignin is adopted as a base body; epoxy chloropropane is adopted as a cross-linking agent; ferroferric oxide is adopted as a magnetic source; and diethylenetriamine, hexamethylenediamine, ethylenediamine and the like are adopted as aminating reagents. Compared with a traditional lignin adsorbent, the method has the characteristics that the adsorbent is easy to separate, can be repeatedly used, is beneficial to environmental protection and the like.

The invention discloses a cobalt diselenide modified carbon fiber composite material and a preparation method and application thereof. The invention is characterized in that the cobalt diselenide modified carbon fiber composite material is formed by loading a cobalt diselenide nanobelt on the surface of a carbon fiber felt and is prepared by the following steps: dissolving cobalt acetate and sodium selenite in a mixed solvent consisting of diethylenetriamine and water, then adding the carbon fiber felt, conducting reaction for 12-18 hours at 150-200 DEG C, and washing and drying the product to obtain the cobalt diselenide modified carbon fiber composite material. The cobalt diselenide modified carbon fiber composite material can be used as a catalyst in a water electro-catalysis hydrogen evolution reaction. The cobalt diselenide modified carbon fiber composite material has a simple synthetic method, is lower in production cost and can be produced in a large scale. The prepared cobalt diselenide modified carbon fiber composite material can be used as a catalyst in the water electro-catalysis hydrogen evolution reaction and has high activity and favorable stability.

The invention discloses a method for preparing a chelating fiber material capable of adsorbing heavy metals in water. According to the preparation process, only the surface layer of a finished fiber material is subjected to activating and grafting reaction in a low-temperature plasma field, the reaction is not carried out in the fiber material, and the treatment conditions are mild; and meanwhile, the fiber surface is multiple in active points, high in grafting rate and high in heavy metal chelating capacity, and the capacity is controllable. The method disclosed by the invention comprises the following steps: activating the melt-blown polypropylene fiber surface by using plasma, and generating lots of macromolecular radicals; allowing the macromolecular radicals to contact with air, so that the PP fiber surface is covered with organic peroxides or hydrogen peroxide; performing graft polymerization on the PP fiber surface by using a glycidyl methacrylate monomer; and finally, enabling an epoxy functional group on GMA to react with diethylenetriamine, thereby obtaining the chelating fiber material capable of adsorbing heavy metals in water.

The invention relates to a high nitrogen doped graphene and fullerene-like molybdenum selenide hollow-ball nanocomposite and a preparation method thereof. The preparation method comprises the following steps: after a molybdenum source and a selenium source dissolving in water and ethylene glycol and low nitrogen doped graphene are fully mixed, solvothermal reaction is carried out under the action of diethylenetriamine as an active agent, so that fullerene-like MoSe2 hollow balls uniformly grow on the graphene and the low nitrogen doped graphene is deeply doped to obtain the high nitrogen doped graphene and fullerene-like MoSe2 hollow-ball nanocomposite. The nanocomposite is obtained through the method of solvothermal in-situ growth. The method is easy to operate and low in cost and can be effectively applied to the fields of photocatalysis, solar batteries and supercapacitors.

The invention relates to a preparation method of polysiloxane modified polyurethane water dispersion. According to the preparation method, IPDI (isophorone diisocyanate) is melted, then, polyether 210 and polyether 220 are added, and the mixture reacts for 25-30 min at the temperature of 70 DEG C-80 DEG C; a polysiloxane modifying agent is added, and the mixture reacts for 30 min; a dimethylol propionic acid solution is added, and the mixture reacts for 25-30 min at the temperature of 70 DEG C-80 DEG C; ethylene glycol is added, the mixture reacts for 40-60 min, and a modified polyurethane prepolymer is obtained; and the prepolymer is cooled to the room temperature, acetone is added, the mixture is uniformly stirred at the normal temperature, then, triethylamine is added, an acetone solution of the prepolymer is obtained and added into a water solution of diethylenetriamine after 15-30 minutes, the mixture is stirred and subjected to emulsification chain extension, acetone is removed, and the polysiloxane modified polyurethane water dispersion is obtained. The prepared polysiloxane modified polyurethane water dispersion has excellent water resistance, ageing resistance, weather resistance, high-low temperature resistance and chemical solvent resistance.

The invention discloses a method for removing carbon dioxide from a gas mixture through biphasic absorption. In the method, an organic solution of enamine is used as an absorbent, wherein the enamine is one or more of diethylenetriamine, triethylenetetramine, tetraethylenepentamine, pentaethylenehexamine and hexvinylhepamino; an organic solvent is one or more of C1-C10 alcohols, tetrahydrofuran, DMF and DMAC; the absorbent has the characteristics of large absorption amount and high absorption speed. The carbon dioxide in the gas mixture is removed by generating precipitate after being contacted with the absorbent, the absorbent is regenerated for desorption after the precipitate is obtained through separation, and desorbed liquid is reused in an absorption process; the method has the advantages of low regeneration temperature, and significant decrease in regeneration energy consumption.

The invention relates to a novel formaldehyde-free fixing agent which is prepared from diethylenetriamine (AE), epichlorohydrin (EP), and dimethyl diallyl ammonium chloride (DMDAAC) with a monomer molar ratio of 2 : 2 : 1. Water is used as a solvent and the obtained product contains 10 % of solid. The prepared fixing agent does not produce formaldehyde substance during production and usage, and the dyed fabric with the dye-fixation treatment does not release formaldehyde either, thereby being capable of effectively improving wet rubbing fastness of cotton fabric dyed with reactive dyes, and obtaining high-quality dye-fixation effect.

The invention relates to a novel nano-composite double network hydrogel and a preparation method thereof. The preparation method of the hydrogel comprises the steps of: performing a condensation (polycondensation) reaction of amines and epichlorohydrin or polyalcohol and aldehydes in clay solution to obtain a condensate (polycondensate)/clay composite first; and adding a hydrophilic monomer under the action of an initiator and a cross-linking agent to obtain the nano-composite double network hydrogel through free radical crosslinking polymerization, wherein in the condensation (polycondensation) reaction, the amines are selected from dimethylamine, methylamine, ethylamine, propylamine, diethylamine, quadrol, propylene diamine, diethylenetriamine, triethylenetetamine and tetraethylenepentamine, the polyalcohol is selected from glycol, propanediol, glycerol, butanediol, neopentyl glycol, pentaerythritol, polyvinyl alcohol, polyethylene glycol, glucose, sucrose, sorbierite, soluble starch and chitosan, the aldehydes are selected from formaldehyde, malonaldehyde and glutaraldehyde, clay is selected from laponite, bentonite or hydrophilic modified bentonite, and the hydrophilic monomer is selected from acrylic acid, acrylamide, N-Isopropylacrylamide, methacrylic acid, acrylonitrile and propene sulfonic acid. The novel hydrogel has the excellent mechanical strength under the condition of high moisture content.

The invention discloses a foam dewatering agent. The foam dewatering agent is prepared by the following raw materials by weight percentage: 5-10% of triethylene tetramine, 10-20% of diethylenetriamine, 1-30% of oleic acid, 2-10% of glacial acetic acid, 5-15% of maleic anhydride, 5-10% of acrylic acid, 2-7% of citric acid, 5-30% of imidazoline, 5-30% of LAS, 5-10% of HCl aqueous solution with the mass percentage concentration of 20%, 5-10% of NaOH aqueous solution with the mass percentage concentration of 30% and 10-30% of water. The foam dewatering agent integrates foam dewatering, corrosion inhibiting and antiscaling functions, as one potion has the functions such as foam dewatering, corrosion inhibiting and antiscaling and the like at the same time, so that one-time filling-up can replace the traditional three-time respective filling-up, thus reducing the cost, simplifying the process without affecting the functions and prolonging the period of validity. The invention also discloses a method for preparing the foam dewatering agent.