46results about How to "Strong positive" patented technology

The invention relates to a modified bentonite load nanometer iron material and a preparation method thereof. According to the technical scheme, the preparation method includes the steps of stirring bentonite and bivalent iron salt solutions to prepare the mixed liquor of the bentonite and the bivalent iron salt solutions, wherein the mass ratio between an iron element and the bentonite is 1: (1-2), then dropwise adding reducing agent solutions to the mixed liquor of the bentonite and the bivalent iron salt solutions and stirring to prepare mixed liquor containing bentonite load nanometer iron, and adding alkyl quaternary ammonium salt solutions into the mixed liquor containing the bentonite load nanometer iron and stirring, wherein the volume ratio between the mixed liquor containing the bentonite load nanometer iron and modifying agent solutions is 1: (0.15-0.20), and the steps are all carried out in a nitrogen environment; then carrying out suction filtration, drying and grinding the obtained solid in a vacuum environment to obtain the modified bentonite load nanometer iron material. The modified bentonite load nanometer iron material prepared by the preparation method has strong reducing capacity and adsorption capacity, and is suitable for removing heavy metal chromium (VI) and heavy metal arsenic (V), wherein the heavy metal chromium (VI) and the heavy metal arsenic (V) exist in water in an anionic form.

The invention belongs to the field of oil field corrosion inhibitors, and in particular relates to an anti-oil well metal equipment corrosion inhibitor, a preparation method and a using method thereof. The inhibitor comprises the following components in percentage by weight: 5 to 20 percent of oleic bis-imidazoline, 3 to 9 percent of lactic acid, 5 to 30 percent of ethanol and the balance of water. The preparation method comprises the following steps of: adding the lactic acid and the ethanol into the water at the temperature of between 50 and 80 DEG C; mixing uniformly; adding the oleic bis-imidazoline into the mixture; and mixing uniformly to obtain a required product. The inhibitor is used for controlling the corrosion of oil and gas equipment; and based on the weight of a corrosive medium, the using amount of the corrosion inhibitor is 10 to 50 ppm. The product greatly improves the anti-corrosion performance of the product and is used for the corrosion inhibition of metal pipelines of oil and gas well equipment.

The invention discloses a preparation method of a novel high-selectivity positively-charged nanofiltration composite membrane. The preparation method comprises the following steps: taking positively-charged polyethylenimine as a functional layer material of the composite membrane, taking aromatic polybasic acid as a crosslinking agent and modifying, and coating and crosslinking on a nanofiltrationmembrane supporting layer to obtain the high-selectivity positively-charged nanofiltration membrane. By adopting a gradient crosslinking technology, the pore diameter of a prepared composite membranecrosslinking layer is gradually increased from bottom to top; and the water flux is greatly improved under the condition of keeping high desalting performance. The preparation method disclosed by theinvention is simple in technology and easy to operate; and the prepared composite membrane can be operated under a low-pressure condition, so that the cost is reduced and the composite membrane is easy to popularize and apply. The nanofiltration membrane prepared by the preparation method has relatively high selectivity on multivalent cations and monovalent cations and can be used for the fieldsincluding water softening, medicines, dyestuffs, lithium extraction of salt lakes, industrial wastewater and the like.

The invention provides a preparation method of an antibacterial chitosan quaternary ammonium salt. The preparation method comprises the following steps: 1) preparing a chitosan solution; 2) adding a long alkyl chain epoxy quaternary ammonium salt and a short alkyl chain quaternary ammonium salt, and carrying out a reaction; and 3) settling the reaction liquid of the step 2), and carrying out washing and drying, so as to obtain a product. As the long alkyl chain epoxy quaternary ammonium salt and the short alkyl chain quaternary ammonium salt are cografted on chitosan, antibacterial chitosan has intensive electropositivity, and can be well combined with a bacterial membrane with negative electricity, and thus an antibacterial effect can be improved. The cografting ratio of the two components is optimized and adjusted, so that the biocompatibility of the antibacterial chitosan can be effectively improved while an antibacterial effect is ensured

The invention relates to a quantum-dot nanometer particle containing a hydrophobic interlayer and a preparation method thereof. The particle is composed of a core, a hydrophobic interlayer and a shell from inside to outside; the core is a quantum-dot nanometer particle or a magnetic quantum-dot nanometer particle; the hydrophobic interlayer has a compact hydrophobic structure, and comprises an intrinsic surface ligand molecule of the quantum-dot nanometer particle or the magnetic quantum-dot nanometer particle, an ionic surfactant containing a saturated aliphatic chain and a silicon precursor reagent containing a saturated aliphatic chain; the shell is a silicon dioxide shell; and the particle size of the core is more than 3 nm and less than 10 nm, and the shell thickness is 0.6-0.7 nm. The water-soluble quantum dot with high quantum yield is prepared for the first time, and the hydrophobic interlayer is capable of effectively preventing factors going against fluorescence emission in the environment, and therefore the quantum dot or magnetic quantum-dot nanometer particle with high fluorescent quantum yield is obtained.

The invention provides a target PEG (Polyethylene Glycol) modified gold nanorod and AlpcS4 coupled combination, preparation and application thereof, and an antitumor composition. The combination comprises AlPcS4 and PEG modified gold nanorods, wherein the PEG modified gold nanorods are gold nanorods modified by HS-PEG-COOH; carboxyl of HS-PEG-COOH is connected with polypeptides or target oligopeptides through amido bonds; AlPcS4 is adsorbed to the surfaces of the gold nanorods through electrostatic adsorption; and the surface plasmon resonance peak of the PEG modified gold nanorods is 750-850 nm. By adopting the combination, the medicine transmission efficiency of AlPcS4 can be improved by virtue of passive targeting capability of the gold nanorods or active targeting capability of target molecules, and the problems that an AlpcS4 medicine is low in transmission efficiency, limited in photodynamic effect and limited in tumor tissue selectivity and enrichment capacity are solved.

The invention discloses carbon quantum dot nano-materials and a preparation method and application of the carbon quantum dot nano-materials. The method comprises the following steps: taking citric acid, mercaptoethylamine and polyethyleneimine, dissolving in ultrapure water, stirring uniformly, carrying out ultrasonic treatment, at the temperature of 120 to 170 DEG C, performing microwave heating, dialyzing a mixed subjected to reactive synthesis in ultrapure water through a dialysis bag, then drying by a vacuum rotary dryer, and collecting materials to obtain the nano-materials. According to the invention, mercaptoethylamine and citric acid are hydrothermally synthesized with polyethyleneimine to obtain carbon quantum dots with multiple biological functions under microwave controlled auxiliary heating conditions, thus the carbon quantum dots with characterization performances of different materials of high brightness fluorescence or high charges and the like can be obtained, and cell wall fluorescent markers of live plant cells with high aqueous-phase dispersion and low cytotoxicity, or materials which promote endocytosis of animal and plant cells and realize high-efficient absorption of external solutions, or materials of plant intact cells realizing the delivery of nucleic acid transfection and with cell walls are optimally selected based on changing synthesis conditions according to needs of different biological applications.

The invention relates to the field of pharmaceutical excipients and preparations, in particular to an oligopeptide cationic lipid derivative (I) or (II), a preparation method thereof and application thereof as a drug carrier in preparations such as lipids and micelles. The cationic lipids has high buffering capabiity, can generate the effects of proton sponge in acidic lysosomes, and can be compounded with plasmid DNA (Deoxyribonucleic Acid), oligonucleotides and small interfering substances (siRNA) into nanoparticle compounds.

The invention relates to a compound diatomite flocculating agent and a preparation method thereof. The compound diatomite flocculating agent is prepared from the following raw materials in parts by weight: 9 parts of iron concentrate, 6 parts of 90% of concentrated sulfuric acid and 35 parts of diatomite with water content of 50%. The preparation method comprises the following steps: fully mixing the iron concentrate and the concentrated sulfuric acid according to the percentages, and completely stirring at room temperature for 1hr so that the materials are fully reacted; adding the reacted materials and diatomite to a kneading machine at the weight ratio of 3 to 7, and stirring for 1hr so that the diatomite is fully mixed and reacted with the mixture of iron concentrate and sulfuric acid and the materials are activated; gradually heating the activated product in a dryer to about 500 DEG C, drying and heating for 10min so that the water content of the material is reduced to be less than 30%, stopping heating and gradually cooling to normal temperature; adding the cooled material to a winnowing device, processing the material sequentially by virtue of a windmill classifier, a cyclone separator and a pulse dust collector and grinding the to qualified grain size which is less than 100 meshes; and packaging the material. The flocculating agent disclosed by the invention is strong in hydrophilcity, and is rapid in dehydration and settlement of a flocculate.

The invention discloses a mitochondria targeted external medicinal preparation which comprises a drug, a drug carrier and an auxiliary material. The drug carrier is mitochondria targeted phospholipid,and a hydrophilic head part of the phospholipid is connected with (3-propyl carboxyl) triphenylphosphine, arginine, lysine or dendritic polypeptide molecules consisting of arginine and / or lysine through an amido bond or an ester bond. Drug-loaded lipidosome prepared from the drug carrier carries positive charges, is easy to take in by cells, and can be targeted to mitochondria under the drive ofa transmembrane potential, so that the drug is released and gradually gathered in the mitochondria, and the drug effect can be further taken in the mitochondria.

The invention discloses tea saponin modified electrolytic manganese residues. The tea saponin modified electrolytic manganese residues are characterized by comprising 5wt%-7wt% of tea saponin, 2wt%-5wt% of NaOH and 88wt%-93wt% of electrolytic manganese residues. The tea saponin modified electrolytic manganese residues are prepared through the following steps: the electrolytic manganese residues and NaOH are added to a high-speed mixer at 25 DEG C and stirred for 6-7 min, tea saponin is added when the temperature reaches 65 DEG C, the mixture is heated and stirred for 5-6 min, and the tea saponin modified electrolytic manganese residues are obtained. A compound flooring tile prepared from the tea saponin modified electrolytic manganese residues and waste plastics is prepared from raw materials in parts by weight as follows: 20-30 parts of waste polyvinyl chloride plastics and 70-80 parts of the tea saponin modified electrolytic manganese residues through stirring, plastication into sheets, die pressing and cutting into sheets. The surface property of the modified electrolytic manganese residues is changed from hydrophilicity to lipophilicity by means of tea saponin, blending compatibility and binding performance of the modified electrolytic manganese residues with waste polyvinyl chloride are improved greatly, the performance of the compound flooring tile is improved greatly, filling parts of the electrolytic manganese residues in the compound flooring tile are increased, and product cost is reduced effectively.

The invention discloses a disinfectant cleaning agent containing guanidine salt. The disinfectant cleaning agent comprises the following components in percentage by weight: 6-10% of a guanidyl modified quaternary ammonium salt surfactant, 2-5% of a nonionic surfactant, 5-10% of citric acid, 5-8% of ethanol, 0.5-1.5% of other auxiliary agents and the balance of deionized water. The disinfectant cleaning agent disclosed by the invention has the advantages of being efficient, safe and harmless to skin.

The invention relates to an anti-rut agent, which is characterized in that the anti-rut agent is composed of the following materials by weight: 40-50% of trivalent ferric salt, 40-50% of synthetic rubber and 10-12% of sulphur stabilizer. A preparation method for the anti-rut agent is characterized in that the steps are as follows: (1), the synthetic rubber is smashed to the degree that the fineness is less than 80 meshes; (2), the smashed synthetic rubber and the sulphur stabilizer are added into trivalent ferric salt solution according to the component proportion; and (3), the mixed solution is stirred uniformly under the normal temperature, so as to obtain the anti-rut agent. The raw materials of the anti-rut agent are obtained easily, the preparation method is simple, the excellent effect can be realized with smaller dosage of the raw materials, the cost is low, the mixing time is short, and the energy consumption is low; the construction is realized under the normal temperature, so that the construction process is controlled easily, and no pollution is discharged, thereby improving the high-temperature stability and the anti-rut capability of an asphalt mixture and realizing higher innovation. The preparation method for the anti-rut agent is simple in operation, is controlled easily and does not cause pollution.

The invention discloses a compound water repellent agent containing tertiary amine polymer brush grafted nano silicon dioxide, and belongs to the field of environment-friendly textiles. According to the invention, specific tertiary amine polymer brush graft modified nano-silica is facilitated, and the polymer brush graft modified nano-silica has good water dispersibility, can be doped, mixed and compounded with a cationic water repellent to obtain the water repellent, and does not influence the stability of the emulsion. After fabric is treated by the obtained compound water repellent, the water repellent is adsorbed on the surface of cotton fiber due to electrostatic interaction and is covered by a water repellent film, so that the compound water repellent has excellent capacity of improving the surface roughness of the fiber, the hydrophobic property of the water repellent can be effectively improved, the use amount of the water repellent is reduced to a certain extent, and the problem of environmental pollution in the use process of the water repellent is solved.

The invention provides a safe and efficient compound disinfection solution, for the technical problem that the long-term use of single-component disinfectant existing in the prior art is easy to produce drug resistance, and cannot kill more highly resistant bacteria and fungi, as well as smaller bacteria and fungi spores and can only inhibit germination and reproduction, and the compound disinfection solution is prepared from the following components in parts by mass: 0.25 part of PHMG, 0.04-0.15 part of 2,2'-[1,2-Ethanediylbis(oxy)]bisethanamine polymer with guanidine monohydrochloride, and 29-400 parts of water. The disinfectant prepared by combining the two guanidine compounds enlarges the application range of the disinfectant, and the synergistic effect between the two guanidine compounds the use of the disinfectant at the conventional concentration kills more highly resistant bacteria and fungi, as well as smaller bacteria and fungal spores.

The invention discloses a preparation method of a polyurethane adhesive for an electrical device, and relates to the technical field of polyurethane adhesives. The preparation method includes the steps: adding 1, 4-butanediamine into isopropyl alcohol, adjusting pH (potential of hydrogen), dripping hydrogen cyanamide under ice-bath, stirring mixture, heating the mixture to perform reaction, addingtriethanolamine, and performing stirring, concentration and re-crystallization to obtain a material a; mixing white carbon black, carbon nano-tubes, bentonite, titanium dioxide, flame retardants andplasticizers to obtain a material b; performing dehydration on hydroxyl-terminated polybutadiene, tetrahydrofuran-epoxypropane copolyether triol and polyethylene glycol adipate glycol, adding isophorone diisocyanate, dibutyltin dilaurate and N-methyl morpholine under protection of nitrogen, and heating and stirring mixture to obtain a polyurethane prepolymer; adding diethanol amine, the material aand benzyl bichloride to perform stirring reaction, adding the material b, stirring mixture to obtain the polyurethane adhesive. The polyurethane adhesive has excellent antibacterial and mold-proof performance, electric insulation performance and heat stability and can keep good electric insulation performances at high temperature.

The invention discloses an antibacterial ES fiber for a cool-feeling non-woven fabric and a preparation method of the antibacterial ES fiber. Taking superfine diatomite and stearic acid, uniformly stirring, adding polypropylene, a phosphite ester antioxidant and PE wax, and uniformly stirring to obtain a core layer mixture; taking superfine diatomite and stearic acid, uniformly stirring, adding polyethylene, a phosphite ester antioxidant and PE wax, and uniformly stirring to obtain a skin layer mixture; uniformly stirring the core layer mixture and the skin layer mixture, extruding, spinning, stretching, drying and cutting off to obtain ES fibers, soaking the ES fibers in a heat-conducting antibacterial solution for 50 minutes, taking out, and drying to obtain the antibacterial ES fibers for the cool-feeling non-woven fabric. The antibacterial solution is composed of ZnO-MOFs grafted with L-arginine and boron nitride grafted with Schiff base, so that the ES fiber fabric is endowed with good antibacterial property and heat-conducting property, heat energy can be rapidly taken away, and the ES fiber fabric can be applied to cool antibacterial non-woven fabrics.

The invention discloses an amino acid zwitter ion hydrogel material and a preparation method thereof. The amino acid zwitter ion hydrogel material is a product of an epoxy ring-opening reaction of a crosslinked polymer containing epoxy groups and amino acid, amino-acid ester or polypeptide containing primary amine groups or secondary amine groups, and has characteristics of zwitter ions when the pH value is about 7. The preparation method comprises the step of performing the epoxy ring-opening reaction on the crosslinked polymer containing the epoxy groups and the amino acid, amino-acid ester or polypeptide containing the primary amine groups or secondary amine groups under an alkaline condition that the temperature is 30-150 DEG C and the pH value is 8-14. The amino acid zwitter ion hydrogel material has the characteristics of hydrophilic property and bio-adhesion resistance, and can be used as a contact lens, a wound covering material, a tissue repair material, a drug carrier or water absorbent.

The invention discloses a nanofiber-based biomedical non-woven fabric and a preparation method thereof. Firstly, phase-change temperature-adjusting microcapsules are added into nuclear layer liquid offirst fibers, a large number of hydrophilic groups are introduced into the nuclear layer liquid to prepare fibers A with super-hydrophilic performance, and alkali liquor is used for preparing multiple holes in the surfaces of the fibers A, so that the binding force of the fibers A and antibacterial capsules is increased; and a spinning solution is modified through an electrochemical method, modified ceramic with anti-radiation and anti-bacterial capacity is added, second fibers with super-hydrophobic performance are obtained, and a first non-woven fabric and a second non-woven fabric are bonded through a bonding agent to obtain the biomedical non-woven fabric which has the phase change temperature adjustment capacity, the moisture absorption capacity, the anti-bacterial capacity, the blood repelling capacity and the anti-radiation capacity, while the wearing comfort of medical staff is improved, invasion of microorganisms and pathogens can be effectively resisted, and high practicability is achieved.

The present invention provides a ferromagnetic semiconductor material having the formula of Liy (Cd1-xMnx) P, wherein y is greater than 0.6 and less than 1.4, and x is greater than 0 and less than 0.4. The present invention also provides a preparation method of the ferromagnetic semiconductor material, the Liy (Cd1-xMnx) P is prepared by sintering a precursor in an oxygen-isolated environment by solid phase reaction method, wherein y is greater than 0.6 and less than 1.4, x is greater than 0 and less than 0.4, and the sintering temperature is 550-950 DEG C.

The invention discloses an organic-inorganic nanoparticle composite water repellent agent, a preparation method and an application method thereof, and belongs to the field of environment-friendly textiles. According to the preparation method, tertiary amine polymer brush grafted nano silicon dioxide is subjected to amination with halogenated hydrocarbon containing a double-bond structure, and thenpolymerized with an acrylate monomer to prepare the organic-inorganic nanoparticle composite water repellent, wherein the obtained composite water repellent agent has good water dispersibility and high surface positive charge density, and does not influence the stability of cationic emulsion. In order to prevent the too thick water-repellent film from hindering the formation of bulges, a thin hydrophobic layer needs to be built, inorganic nano silicon dioxide particles after fabric treatment can be adsorbed on the surface of cotton fibers along with cationic latex particles by controlling theuse amounts of organic components and inorganic components in the water repellent, and projections are provided during organic matter film formation, so that the roughness of the surface of the cotton is increased, the hydrophobic property of the water repellent is improved, the use amount of the water repellent is reduced to a certain extent, and environmental pollution is reduced.

The invention discloses a method for preparing a quaternary ammonium cationic starch flocculant in a DMSO / H2O / NaOH system. The method comprises following steps: 1), NaOH is dissolved in water, DMSO and starch are added, a mixture is heated, stirred and subjected to reflux condensation for a reaction, and a starch activation liquid is obtained; 2), the starch activation liquid obtained in the step 1) is cooled to 60-75 DEG C, then an etherifying agent activation liquid is added and stirred, and a reaction is performed for 0.5-1 h; 3), the white powdery quaternary ammonium cationic starch flocculant is obtained through cooling, purification and drying. According to the method, the starch is pre-activated in the DMSO / H2O / NaOH system, the reactions are performed in a homogeneous system, so that the starch has higher plasticity, active sites for combination of an etherifying agent and the starch are increased, the activated starch can react with the cationic etherifying agent rapidly, the quaternary ammonium cationic starch flocculant prepared with the method can be completely dissolved in water, colloid particles can be clustered through flocculation under the sufficient bridging and cross-linking actions, and the flocculation effect cannot be influenced by a settlement action of the flocculant.

The invention discloses a tea-saponin-modified oil shale ash. The tea-saponin-modified oil shale ash is prepared from 3-5wt% of tea saponin, 2-3wt% of NaOH and 92-95wt% of oil shale ash. The tea-saponin-modified oil shale ash is prepared through the following steps that oil shale ash and NaOH are added into a high-speed mixer at 20 DEG C and stirred 4-6 min, tea saponin is added at 60 DEG C and then heated and stirred 3-4 min, and the tea-saponin-modified oil shale ash is obtained. A composite floor tile prepared from the tea-saponin-modified oil shale ash and waste plastic is prepared from, by weight, 20-30 parts of waste polyvinyl chloride plastic and 70-80 parts of the tea-saponin-modified oil shale ash through stirring, plastication sheeting, mould pressing and sheet cutting. The surface nature of oil shale ash is modified to be lipophilic from hydrophilic with tea saponin, the blending compatibility and combinability of the oil shale ash and waste polyvinyl chloride are greatly improved, and the performance of the composite floor tile is greatly improved; meanwhile, the filling parts of the oil shale ash in the composite floor tile are increased, and the product cost is effectively reduced.

The invention relates to an antibacterial soybean protein fiber fabric and a dyeing and finishing process thereof. The dyeing and finishing process comprises the steps of bleaching, dyeing and after-finishing. The dyeing step comprises the steps of S1, pretreatment: placing soybean fibers in an aqueous solution containing 1-5 g / L of zein / N-2 hydroxypropyl trimethyl ammonium chloride chitosan composite particles at the temperature of 80-85 DEG C, carrying out oscillation treatment for 5-10 min, adding sodium bicarbonate, soaking for 1-10 min, taking the fibers out, washing with water to be neutral, and performing airing; and S2, dyeing: dyeing the modified soybean fibers with reactive dye. According to the antibacterial soybean protein fiber fabric and the dyeing and finishing process thereof, the soybean fibers are pretreated by using the zein / N-2 hydroxypropyl trimethyl ammonium chloride chitosan composite particles; and in the case of not adding inorganic salts for accelerating and low alkali concentration fixation, the dye and the color fixation rate of the fabric are still slightly higher than that of a traditional salt-adding dyeing process, and the dyed fabric shows better softness and glossiness.

The invention discloses a preparation method of a modified material for PVC (Polyvinyl Chloride). The preparation method comprises the following specific steps: S1, carrying out surface treatment on nano SiO2; s2, preparing a seed emulsion; s3, preparing a core-shell modification auxiliary agent, namely adding the seed latex obtained in the step S2 into a reflux condensation device, heating in a water bath to 73 DEG C, adding a certain amount of a core-layer initiator and a crosslinking agent, supplementing a certain amount of an emulsifier, slowly adding a core-layer monomer, carrying out heat-preservation reaction for 1 hour, then adding a shell-layer initiator, slowly adding a shell-layer monomer, continuously carrying out heat-preservation reaction for 1-2 hours, and cooling to room temperature, so as to obtain the core-shell modification auxiliary agent. And adding a saturated saline solution for demulsification, and carrying out low-temperature vacuum drying to obtain the core-shell modification additive. According to the invention, inorganic nano silicon oxide subjected to surface modification is subjected to seed emulsion polymerization to synthesize a novel impact modifier with a core-shell structure, so that the toughness and the strength of PVC can be improved, and the impact modifier also has the functions of resisting aging and improving processability.

The invention relates to an asphalt mixture with high anti-rut capability, which is composed of the following materials by weight parts: 93.5-96.5 parts of mineral aggregates, 3.5-6.5 parts of asphalt and 0.175-0.65 parts of anti-rut agent. A preparation method for the asphalt mixture with high anti-rut capability is characterized in that the steps are as follows: (1), the asphalt is heated to 145-165 DEG C, and the mineral aggregates are heated to 150-180 DEG C; (2), 93.5-96.5% of mineral aggregates and 3.5-6.5% of asphalt are put into a mixer to be mixed, and the anti-rut agent with amount of 2-10% of asphalt is sprayed after the asphalt is put for 5-8s; and (3), after the anti-rut agent is sprayed in the step (2), the mixture is stirred for 10-15s, then mineral powder is added, the obtained mixture is stirred more than 15s continuously, thereby ensuring uniform stirring, so as to obtain the finished product (the asphalt mixture with high anti-rut capability). The asphalt mixture with high anti-rut capability is rich in raw materials, low in preparation cost, high in cost performance and strong in anti-rut capability; and the preparation process for the asphalt mixture is simple and easy, equipment is easy, and the preparation process is easy to realize.

The invention relates to a method for preparing a water-soluble cationic lignin-based flocculant by a semi-dry method, and belongs to the technical field of material science. The method comprises thefollowing steps: adding lignin into deionized water at room temperature, mixing with grafting monomer METAC solution, adjusting pH to 2-5 to obtain reaction solution; adding potassium persulfate intothe reaction solution under nitrogen atmosphere, and performing water bath reaction to obtain lignin-METAC grafting copolymer crude product; washing and dialyzing the obtained lignin-METAC grafting copolymer crude product to obtain the purified lignin-METAC grafting copolymer. The product obtained by the method is subjected to flocculation treatment on papermaking wastewater and emulsified oil-containing wastewater after being purified, so that a better treatment effect is obtained; meanwhile, the method is simple in process, less in water consumption, good in water solubility and cationicity,thereby achieving industrial production easily, and being a new way for high-value utilization of the lignin.

The invention relates to a guanidyl modified quaternary ammonium salt which has a following structural formula, wherein R1 is C8-C12 saturated straight-chain paraffin; R2 is equal to H or R1; and R3 is equal to H or CH3. The guanidyl modified quaternary ammonium salt has the advantages of higher positive electricity, obvious sterilizing effect, excellent killing effect special for fungus, excellent water solubility and excellent compounding property.

The invention belongs to the technical field of chemicals for daily use and relates to a botanical antioxidation bacteriostatic environment-friendly hand sanitizer. The botanical antioxidation bacteriostatic environment-friendly hand sanitizer is characterized by comprising the following ingredients in percentage by mass: 10%-15% of surfactants, 1%-3% of quaternary ammonium salt / phosphorylcholine / chitosan, 1%-2% of lonicera japonica / green tea / liquorice extract, 1%-3% of sodium chloride, 1%-3% of glycerine and the balance of water. The invention further provides a preparation method for the antioxidation bacteriostatic cleaning hand sanitizer. The botanical antioxidation bacteriostatic environment-friendly hand sanitizer developed by the invention simultaneously has the advantages that thedetergency is high, the surfactants are non-soap-base and non-amino-acid surfactants, the cleaning function can be achieved by only adding a small amount of surfactants, and natural bacteriostatic ingredients with good water solubility and high antibacterial activity and natural antioxidation ingredients are added.