31results about How to "Strong specific adsorption capacity" patented technology

The invention discloses a reusable low-cost silica aerogel oil-absorbing sponge material and a preparation method thereof, belongs to the technical field of environment. The method disclosed by the invention comprises the following steps: synthesizing a silica aerogel precursor from functional group substituted alkoxy silane used as a raw material under the action of surfactant; and under the condition of drying at room temperature and normal pressure, preparing the elastic lipophilic hydrophobic silica aerogel oil-absorbing sponge, The silica aerogel material prepared by the method has low density, satisfactory elasticity, stable performance and favorable lipophilicity and hydrophobicity, and is reusable; and compared with the common silica aerogel, the reusable low-cost silica aerogel oil-absorbing sponge is wider in applicable temperature range, more convenient in manufacturing process, lower in cost and more stable in quality.

The invention discloses a blood-purifying adsorbent for clearing blood bilirubin and a preparation method thereof. The blood-purifying absorbent is fixed on a solid-phase carrier by adopting methacrylate biquaternary ammonium salt as aglucon through a chemical grafting method or a physical film-coating method, wherein the solid-phase carrier is a polymeric adsorbent. Correspondingly, the invention discloses a preparation method of the blood-purifying adsorbent for clearing blood bilirubin. According to the blood-purifying adsorbent disclosed by the invention, methacrylate biquaternary ammonium (PDQ for short) is adopted as the aglucon, so that not only can the special capacity for absorbing bilirubin be achieved, but also the compatibility of the adsorbent is remarkably improved. Meanwhile, the physical and chemical properties are stable, and the cost is relatively low.

The invention discloses a preparation method of a lanthanum hydroxide modified aerogel phosphorus removal adsorbent, and relates to a preparation method of a phosphorus removal adsorbent. The invention aims to solve the problems of low saturated adsorption capacity, difficulty in recycling after adsorption, low mechanical property and the like of the existing phosphorus removal adsorbent. The preparation method comprises the following steps: mixing a graphene oxide dispersion liquid, a lanthanum hydroxide aqueous solution and a sodium alginate aqueous solution, violently stirring, dropwise adding a cross-linking agent aqueous solution to obtain hydrogel beads, standing, carrying out cross-linking solidification, and finally, sequentially washing and drying the product. The adsorbent can berecycled, and is low in cost, high in adsorption speed, high in adsorption capacity and good in mechanical property. The method is suitable for preparing the phosphorus removal adsorbent.

The invention relates to the field of environmental function adsorbents, in particular to a method for preparing a heavy metal ion imprinting material with a microwave-assisted inverse emulsion polymerization method and an application of the heavy metal ion imprinting material. The method includes the steps that heavy metal ions serve as imprinting ions, cyclodextrin matter and acrylamide matter are used as functional monometers, the functional monometers are polymerized in a microwave-assisted mode with the inverse emulsion method, and the imprinting material with the small and even particle size is prepared. The method for preparing the heavy metal ion imprinting material is easy to operate, and the imprinting material has the advantages of being small in particle size, large in specific surface area, high in specific adsorption capacity and the like.

The invention provides a multi-stage indoor formaldehyde removing device with sterilization effect. According to the invention, a high-pass filter screen, a water vapor removing layer, a carbon dioxide removing layer, a steel mesh and a formaldehyde removing layer are sequentially installed between an air inlet and an air outlet; the high-pass filter screen is used for filtering dust particles andPM2.5 particles; the water vapor removing layer is made of a silica gel or molecular sieve, and the silica gel or molecular sieve is grown on activated carbon cotton or high-pass fibers; the carbon dioxide removing layer employs a metal organic framework material growing on the activated carbon cotton or high-pass fibers; the steel mesh is sprayed with nanometer silver ions and is provided with aplurality of uniformly-distributed ultraviolet lamps; and the formaldehyde removing layer is a metal organic framework material growing on the activated carbon cotton or high-pass fibers, and the metal organic framework material is doped with a photocatalyst. The multi-stage indoor formaldehyde removing device of the invention can remove PM2.5, dust, water vapor and CO2 gas step by step, therebyefficiently removing formaldehyde and achieving sterilization effect at the same time.

The invention relates to a preparation method of a halloysite surface initiated boron affinity imprinted polymer adsorbent, and belongs to the technical field of preparation of environmental functional materials. The method comprises the following steps: purifying halloysite (HNTs), and wrapping the surface of halloysite with a layer of dopamine to form HNTs@PDA; connecting a bromine initiator to the surface of the HNTs@PDA to obtain HNTs@PDA@Br; connecting vinyl imidazole to the HNTs@PDA@Br through an atom free radical polymerization technology to obtain HNTs@PDA@Br@VLD; and adsorbing zinc ions, adsorbing luteolin, introducing fluorophenylboronic acid, and carrying out ATRP polymerization in order to obtain the imprinted polymer. Imprinted polymer microspheres prepared through the method have the advantages of good chemical stability, high adsorption capacity, good acid-alkali effect, realization of reversible adsorption/release functional luteolin with the acid-base value, and specific and high selective identification performance.

The invention discloses a preparation method of an immunoaffinity column. The immunoaffinity column is a compound affinity column which is mainly prepared from three types of immunoaffinity columns through mixed packing in a volume ratio being 1:1:1, and the three types of immunoaffinity columns are prepared from three antibodies and a coupling matrix through coupling and wet packing. The column capacity of the immunoaffinity column is 2,500 ng, the immunoaffinity column is good in purification effect and can be repeatedly used three times, and average recovery rate is 67%-107%. The compound immunoaffinity column has good specific adsorption property for at least 12 sulfonamides including sulfaquinoxaline, sulfadiazine, sulfapyridine, sulfametoxydiazine, sulfadimidine, sulfamethoxazole, sulfafurazole, sulfadimethoxypyrimidine, sulfathiazole, sulfamerazine, sodium N-sulphanilamidate and sulfamonomethoxine. The immunoaffinity column which is high in coupling rate, specific adsorption property, column capacity and recovery rate is prepared, and a sensitive, rapid and simple analysis method capable of detecting residues of the 12 sulfonamides simultaneously is provided.

The invention discloses a synthesis method and application of a sulfonamide dimethylpyrimidine molecularly imprinted polymer. The synthesis method comprises the steps: adopting sulfamethazine as a template molecule, adopting methacrylic acid and diallylamine as mixed functional monomers and divinylbenzene as a cross-linking agent under the condition of a methanol solvent, and performing a precipitation polymerization reaction in a constant-temperature bath under the action of an initiator so as to prepare the sulfonamide dimethylpyrimidine molecularly imprinted polymer. The sulfonamide dimethylpyrimidine molecularly imprinted polymer has a good recognition ability for SMZ, the effects of separation and enrichment of SMZ are achieved through specific SMZ adsorption, and good specific adsorption abilities are achieved.

The invention belongs to the field of extraction media, and particularly relates to a preparation method of a solid-phase micro-extraction fiber for extracting and separating a residue of a trace sulfanilamide medicine in a food sample. A preparation method of a solid-phase micro-extraction fiber with specificity to a sulfanilamide medicine comprises the following steps of (1), preparing a prepolymerization solution; (2), carrying out deoxidization operation on the prepolymerization solution prepared and obtained in the step (1); (3), preparing a solid-phase micro-extraction material. The preparation method has the beneficial effects that the solid-phase micro-extraction material prepared by the method provided by the invention has the characteristics of being convenient to operate and use, high in specific adsorption capacity, high in recovery rate and low in preparation cost; meanwhile, the defect that the amount of a solvent needed by a conventional sample pretreatment technique is large is also overcome. Moreover, the material prepared by the preparation method is simple in preparation process steps, and can be cyclically utilized for multiple times; the problem that a commercialized solid-phase micro-extraction fiber is poor in selective adsorption is solved.

The invention discloses a method for preparing clenbuterol hydrochloride molecularly imprinted polymer microspheres. The preparation method comprises the following steps: 1) mixing a non-ionic surfactant solution, clenbuterol hydrochloride, a pore-forming agent, an initiator, inorganic nanoparticles, mono-ene monomers and polyene monomers, and performing homogenization to form an emulsion; 2) heating the emulsion to react so as to obtain polymer microspheres; 3) washing the polymer microspheres, further soaking the microspheres in an acid solution, taking out the microspheres, and cleaning andremoving the acid solution so as to obtain template removed microspheres; and 4) performing Soxhlet extraction on the template removed microspheres, and performing drying, so as to obtain the clenbuterol hydrochloride molecularly imprinted polymer microspheres. The preparation method disclosed by the invention is simple and convenient and is cost saving and environment-friendly. The prepared clenbuterol hydrochloride molecularly imprinted polymer microspheres have good uniformity, strong specific adsorption ability and high stability, and have broad application prospects in fields such as food safety detection and environmental remediation.

The invention relates to a device with an atmospheric purification function, which comprises a box body and a transparent water storage tank, a gas collection plate is embedded in one side of the upper end of the back surface of the box body, an air pump is communicated with one side of the gas collection plate and located in an inner cavity of the box body, and the air outlet end of the air pumpis communicated with a filter box through a pipeline. Through the arrangement of the air pump, the air pump works, the air suction end of the air pump sucks external air through the air collection plate, gas passes through a PP filter paper filter plate, harmful substances in the gas can be filtered, the filtered gas enters the activated carbon filter plate, and the activated carbon filter plate further adsorbs and filters the harmful substances in the gas; the gas enters the glass fiber filter plate again, the glass fiber filter plate can filter small particles in the gas, the gas enters themelt-blown polyester non-woven fabric filter plate again, and the melt-blown polyester non-woven fabric filter plate adsorbs and filters harmful substances in the gas again.

The invention provides a preparation method and application of solid-phase extraction filler and solid-phase extraction column for basic dyes in food. The solid-phase extraction filler adopts functional ionic liquid 1-benzyl-3-methylimidazolium hexafluorophosphate and 1-decyl-3-methylimidazolium hexafluorophosphate, which have structures extremely similar to those of basic dyes, as main adsorptionreagents; the specific adsorption capacity on various basic dyes is high, impurities such as salt, carbohydrate, pigment, grease, protein and starch in a food matrix are not adsorbed, and the impurities and the basic dyes in a to-be-detected sample can be effectively separated. The functional ionic liquid is immobilized by silica gel to form a loose solid-phase extraction filler, and the loose solid-phase extraction filler can be in full contact with an extracting solution of a to-be-detected sample without extrusion. The speed of the sample liquid passing through the filler is high, the extraction efficiency is improved, and the sample pretreatment time is shortened. A solid-phase extraction column prepared from the filler can be used for rapidly determining the content of basic dyes infood in high performance liquid chromatography, and the determination result is accurate and stable.