14results about How to "Enhance electrostatic interaction" patented technology

The invention discloses a method for removing silicon in ardealite, which comprises the following steps of: crushing, screening, pickling and centrifugally filtering the ardealite, drying the pretreated ardealite at low temperature, mixing the dried ardealite with an alkaline extracting solution, and stirring and heating, and after cooling to room temperature, adjusting the pH value of the solution, and adding the aminated composite aerogel to realize desorption of silicon. Chopped electrostatic spinning fibers are attached to pores of the aminated composite aerogel and can serve as a supplementary adsorption material of the aerogel, and the adsorption performance is improved through cooperation of the chopped electrostatic spinning fibers and the aminated composite aerogel. According to the preparation method, the aerogel can be recycled by utilizing the magnetism of the aerogel, and the aminated composite aerogel can be recycled after being soaked in the alkali liquor and ultrasonically cleaned, so that the preparation method has the characteristic of environmental friendliness.

The invention discloses a preparation method of low-temperature sintered ceramic. The preparation method comprises the following steps: S1, pretreating kaolin; s2, modifying kaolin; s3, preparing a ceramic green body; s4, preparing a glaze material; and S5, preparing the low-temperature sintered ceramic. According to the low-temperature sintered ceramic provided by the invention, the kaolin is pretreated and modified, and the special grinding aid is added in the preparation process of the ceramic green body, so that the sintering temperature of the ceramic is effectively reduced, the sintering process is optimized, low-temperature sintering of the ceramic is realized, the energy consumption is reduced, and the production efficiency is also improved; the method has remarkable economic benefits and environmental protection significance, and the prepared ceramic has good mechanical properties.

The invention discloses a preparation process of an anti-breaking glass material, and relates to the field of glass materials. When the anti-breaking glass material is prepared, nano silicon dioxide sequentially reacts with 3-(N-allylamino) propyltrimethoxysilane and ethylene oxide-2-methyl sodium sulfonate to obtain modified nano silicon dioxide; the preparation method comprises the following steps: uniformly mixing potassium titanate whiskers, maleic anhydride, methyl acrylate and 2-methyl-1, 3-butadiene to obtain modified potassium titanate whiskers; the preparation method comprises the following steps: reacting 5-(dimethylamino)-2-hydroxybenzaldehyde with 3-aminopropyl trimethoxy silane to obtain functionalized trimethoxy silane; then enabling tetraethoxysilane and the functionalized trimethoxysilane to react, and grafting 4-chlorobutene to obtain quaternized silica sol; uniformly mixing the modified nano silicon dioxide, the modified potassium titanate whisker, the quaternized silica sol and the hydrogen-containing silicone oil, and spin-coating a glass substrate with the mixture to obtain the anti-breaking glass material. The anti-breaking glass material prepared by the invention has excellent antifouling property, wear resistance and impact resistance.

The invention discloses a preparation and purification method of carboxymethyl chitin, which comprises the following steps: crushing a proper amount of blocky chitin raw material, adding the crushed blocky chitin raw material into an alcohol solution, fully stirring to fully swell the chitin, adding a pre-prepared alkali solution into the solution, carrying out alkalization reaction, adding pre-prepared carboxylation reaction liquid in batches, and carrying out solid-liquid separation to obtain the carboxymethyl chitin. The preparation method comprises the following steps: fully carrying out carboxymethylation reaction, standing, removing supernate, filtering to obtain a crude carboxymethyl chitin product, carrying out alkali-assisted alcohol precipitation, adding the precipitate into a low-concentration alcohol solution, adjusting the pH value to be neutral by using acid in a stirring state, adding a high-concentration alcohol solution, uniformly stirring, filtering, removing supernate and the like. According to the method, a traditional heterogeneous reaction system preparation process is optimized, the alkali-assisted alcohol precipitation and step-by-step elution technology is utilized for purification treatment, the dosage of ethanol is saved, the problems that in the prior art, carboxymethyl chitin is high in purification cost, high in salt content and the like are solved, and the process is simple, efficient, low in cost, good in purification effect and suitable for industrial production.

The invention belongs to the field of water remediation material preparation, and particularly provides a preparation method and application of a biochar-loaded Fe2C composite material. According to the preparation method, crop straw is adopted as a raw material to prepare biochar-loaded Fe2C, straw reutilization is achieved, the preparation method is easy to operate, and the material is convenient to recycle; meanwhile, according to the prepared biochar-loaded Fe2C composite material, the removal capacity of straw biochar on Pb, Cu, Co, Ni and Zn is enhanced by introducing Fe, and meanwhile, the material has good selective adsorption on copper.

The invention provides a high-performance olefin polymer-based composite material, and belongs to the technical field of high polymer materials. The preparation process comprises the following steps: preparing the antistatic flame-retardant composite filler; preparing a phase change microcapsule; preparation of a PDMA-SH homopolymer; preparing high-temperature-resistant nano powder; preparing a high and low temperature resistant composite coating; and preparing the polypropylene-based battery shell material. By adding the antistatic flame-retardant composite filler into polypropylene, the antistatic performance of the polypropylene material can be remarkably improved, and the antistatic flame-retardant composite filler can form a conductive network in the polypropylene material, so that the surface resistance is effectively reduced, electrostatic accumulation is reduced, and potential safety hazards caused by static electricity are prevented; the antistatic flame-retardant composite filler can improve the flame retardant property of polypropylene, and the nano antimony-doped tin oxide and other components can release flame-retardant gas at high temperature to form a protective layer, prevent flame spread and reduce the combustion rate, thereby improving the safety of the material.

The present invention belongs to the technical field of soil pollution remediation, and specifically relates to a bacterial agent based on arsenic conversion microorganisms for long-term oxidation and stabilization of soil arsenic pollution. The bacterial agent based on arsenic conversion microorganisms for long-term oxidation and stabilization of soil arsenic pollution includes a modified guar gum carrier and a bacterial solution, and the preparation of the modified guar gum carrier includes the following steps: taking guar gum, phosphorus tribromide, and pyridine in toluene at 5-20°C for 10-12h, and treating to obtain brominated guar gum; taking brominated guar gum and N,N,N',N'-tetramethyl-1,4-butanediamine in tetrahydrofuran for 16-24h, and treating to obtain a modified guar gum carrier. The modified guar gum and the bacterial solution act together to increase the bacterial solution repair speed, and can adsorb and aggregate arsenic ions in the soil, so that the bacterial solution can quickly oxidize trivalent arsenic ions into a pentavalent arsenic ion state with low toxicity and low mobility.

The invention belongs to the technical field of ardealite solid waste treatment, and particularly relates to an ardealite reverse-direct flotation coupling synchronous impurity removing and whitening process. The process comprises the following steps: mixing and stirring ardealite and water to obtain ore pulp; after sufficient stirring, adding a flotation reagent A into the ore pulp, continuously stirring at a high speed, aerating, carrying out reverse flotation, scraping bubbles until the bubbles are white, and taking a product in a tank as rough concentrate ore pulp; adding a flotation reagent B into the rough concentrate pulp, continuously stirring at a high speed, adding a certain amount of foaming agent, continuously stirring at a high speed, aerating, carrying out direct flotation, and scraping bubbles until floating gypsum does not exist, so as to obtain a foam product; and filtering and drying the foam product to obtain a concentrate product. After'one-reverse and one-positive 'flotation, the whiteness and the purity of CaSO4. 2H2O are greatly improved, the SiO2 content, the organic matter content and the fluorine ion content are greatly reduced, and the problems that an existing ardealite treatment process is single in impurity removal capacity, common in removal effect, long in process line, large in agent dosage and high in cost are solved.

The invention relates to preparation of Chinese yam protein as a hydrophobic drug carrier and application of the Chinese yam protein to improvement of renal injury. The Chinese yam protein is dispersed in deionized water, hydration is performed overnight, glutamine transaminase and galactose are added, enzyme deactivation is performed after water bath, the mixture is cooled to the room temperature, centrifugation is performed, supernate is taken and dialyzed at the temperature of 4 DEG C, and freeze-drying is performed to obtain GL-YP powder; dissolving the GL-YP powder, hydrating overnight, and regulating the pH value to 11.0 by using 1M NaOH; dissolving curcumin in absolute ethyl alcohol, dropwise adding a curcumin stock solution into the GL-YP solution, and stirring; and adjusting the pH value to 7.0 by using 1M HCL, centrifuging the prepared suspension, taking the supernatant, and freeze-drying to obtain the GLYP-Cur-NPs nanoparticles. The GL-YP can be used as an effective curcumin encapsulation carrier and has good encapsulation effect and drug loading capacity, and the problem of water solubility of curcumin as a hydrophobic drug is solved; the GLYP-Cur-NPs has a protective effect in a cis-platinum induced HEK293 cell oxidative damage model, can reduce the inflammation level, has treatment potential for renal injury, and is used for preparing the medicine for treating renal injury.

This invention discloses a method for applying hydrothermally loaded carbon oxalate ore to heavy metal adsorption. This method is the first to discover the role of hydrothermally loaded carbon oxalate ore in the adsorption of arsenic and cadmium, and particularly reveals its synergistic adsorption effect on arsenic and cadmium. Specifically, the presence of arsenic promotes the adsorption of cadmium. This invention avoids competitive adsorption between cadmium and arsenic, exhibiting high adsorption capacity for both, providing a new approach for the rapid and efficient simultaneous treatment of arsenic and cadmium in water.

The invention discloses a thermal response type environment-friendly anti-collapse agent and a preparation method thereof, and relates to the technical field of oilfield chemistry. The method comprises the following steps: taking carboxylated thermal expansion graphite, benzene ring-containing amino acid and cationic amino acid, uniformly mixing, carrying out high-temperature melt polycondensation reaction under the action of alkali, adding long-chain fatty amine after the reaction, continuing the reaction, and cooling and crushing the reaction product. The anti-collapse agent disclosed by the invention is extremely weak in adhesion effect at normal temperature and does not play a role, and can be gradually softened in a high-temperature environment, so that the adhesion performance is remarkably enhanced, and the anti-collapse agent has the characteristic of temperature response; when being used as an anti-collapse agent, the anti-collapse agent has the advantages of good adhesiveness, strong wall fixing property, good compatibility, high temperature resistance and the like.

This invention discloses an engineered mutant CpAgo_PM based on a novel PAZ nucleic acid binding pocket and its applications, belonging to the fields of molecular biology and genetic engineering. The amino acid sequence of the mutant CpAgo_PM is shown in SEQ ID NO.1. This invention rationally designs the PAZ nucleic acid pocket, mutating some normally non-positively charged amino acid residues in the pocket to positively charged amino acids (CpAgo_PM). In in vitro cleavage experiments, four different target sites (TET2-1 / 2 / 3 / 4) on the human TET2 gene transcript were tested. Compared with CpAgo_WT, CpAgo_PM significantly improves the cleavage efficiency at three sites: TET2-1, TET2-2, and TET2-4, indicating that it partially overcomes the sequence cleavage bias of the wild type. Furthermore, its gene editing function in a eukaryotic cell environment has been clearly demonstrated.

The invention discloses a super-crosslinked polyamide-imide polymer and a preparation method thereof, and relates to a polymer and a preparation method thereof, the polymer has a plurality of active adsorption sites such as carbonyl, imide ring and amide, and provides rich nitrogen and oxygen heteroatoms and a regular polymer network structure. Due to the fact that the super-crosslinked polyamide-imide polymer carries a large number of positive charges and a regular polymer network structure, the electrostatic interaction with anions is enhanced, bromine, iodine and dye anions can be evenly fixed to the adsorbent, and meanwhile the adsorption capacity of the adsorbent is improved. The carried oxygen-containing functional group, nitrogen-containing functional group and fluorine-containing functional group can be used as Lewis alkaline sites to be combined with bromine, iodine and organic dye; the preparation method is simple, and the cost is reduced. The super-crosslinked polyamide-imide polymer is widely applied to preparation of pollutant adsorption materials and has a wide application prospect in the field of pollutant adsorption materials.

The application belongs to the field of engineering technology and provides a preparation method of a nucleic acid separation device. The preparation method of the application prepares a hydrogel nucleic acid adsorption device through a photo-initiated radical polymerization reaction, avoiding the cumbersome limitations of traditional polymerization reactions which need to be carried out under anaerobic conditions. The preparation method is simple and fast, and does not depend on professional and precise instruments. The raw materials are cheap and easy to obtain. The method can efficiently load silica particles, effectively combine the plasticity of the hydrogel with the high specific surface area of the silica particles and the strong binding capacity of the nucleic acid, and further obtain a handheld nucleic acid extraction device which can change shape, size and quantity at any time according to application requirements, has a high specific surface area and excellent nucleic acid extraction performance. Compared with traditional processes, the preparation process is simpler, the application range is wider, and the application requirements of low resource environment are greatly met, and the application prospect in the field of outdoor and clinical nucleic acid extraction technology is broad.