1400results about How to "Improve hydrophilic ability" patented technology

The invention discloses a method of producing the hyperfiltration membrane of amphiphilic copolymer modified polyvinylidene fluoride, comprising the following steps: 1) mixing polyvinylidene fluoride, poly (methyl methacrylate - monomethyl ether polyoxyethylene methyl methacrylate), additives, non-solvent and solvent to form the casting film solution; 2) making the casting film solution into the polyvinylidene fluoride membrane by using the film forming machine and then soaking in the coagulation bath; 3) conducting the posttreatment of hydrophilicity; 4)obtaining the hydrophilic polyvinylidene fluoride ultrafiltration membrane after cleaning and drying. The method is characterized in that the brush shape, chain ball shape or dumbbell shape amphiphilic copolymer are mixed with the polyvinylidene fluoride to produce the polyvinylidene fluoride hyperfiltration membrane with hydrophilicity, anti-pollution, large flux and high retention rate by adopting the solution phase conversion method. The method has the advantages that the obtained membrane is provided with dozens to hundreds nanometer of particular densified hydrogel surface layers, the contact angle of the membrane surface can be reduced below 60 degrees and can be lowered to 0 degree within tens of seconds, the water flux can reach 1000L /m<2>/ h (0.1Mpa) or above, the retention rate of BSA can reach 90% or more and the recovery rate of water cleaning flux can reach 90% or higher.

The present invention provides the preparation process of super-paramagnetic polymer microsphere. The super-paramagnetic polymer microsphere consists of polyolefin polymerized with lipophilic olefin monomer and organic monomer with hydrophilic functional radical and coated nano magnetic grains of modified ferroferric oxide. The nano magnetic grains with one surface lipophilic layer can be well dispersed in organic matter to form magnetic fluid and dispersed inside polymer microsphere to obtain super-paramagnetism. The microsphere is regular and has size of 0.1-5 micron and has magnetic ferroferric oxide accounting for 0.5-40 wt% of the whole micro microsphere. The present invention has the advantages of simple preparation process, narrow microsphere size, regular appearance, high functional radical content, homogeneous magnetism, stable chemical performance and acid and alkali resistance.

The invention discloses a quick release type medicine phosphatide compound and a medicine composition thereof. In the compound, a medicine Y1 and a medicine Y2 are connected with a quick release type hydrophobic spacer arm and an enhancement type hydrophobic spacer arm through chemical bonds, the two spacer arms are cooperated to enhance the hydrophobic effect to form hydrophobic lipotropy chains, the two hydrophobic chains are connected with a phospholipid hydrophilic head to form an amphipathic molecule. The medicine composition is the quick release type medicine phosphatide compound or a combined medicine composition of the compound and a carrier acceptable in pharmacodynamics. The quick release type medicine phosphatide compound and lipidosome nano particles thereof can be used as a liquid preparation, a solid preparation, a semi-solid preparation, a sterilization preparation and a sterile preparation, are low in toxicity and can be used for efficiently treating various tumor diseases.

The invention discloses an oxidized graphene metal/metallic oxide nanoparticle modified hollow fiber ultrafiltration membrane, and a preparation method thereof. According to the preparation method, anchoring of metal/metallic oxide nanoparticles on oxidized graphene is carried out; an obtained oxidized graphene dispersion liquid loaded with the metal/metallic oxide nanoparticles is added into a membrane material, and a membrane casting solution is obtained via mixing; the membrane casting solution is subjected to weaving so as to obtain the oxidized graphene metal/metallic oxide nanoparticle doped hollow fiber ultrafiltration membrane. Mechanical strength, water flux, retention rate, hydrophilic performance, pollution resistance, and service life of the hollow fiber ultrafiltration membrane are improved obviously; the preparation method is simple; operation is convenient; and repeatability is high.

The invention discloses high-toughness concrete and a preparation method thereof. The formula of the high-toughness concrete comprises 0.2-0.5kg/<m>3 of modified graphene, 150-175kg/<m>3 of water, 395-415kg/<m>3 of cement, 45-60kg/<m>3 of coal ash, 20-35kg/<m>3 of slag powder, 1000-1100 kg/<m>3 of broken stone, 600-700 kg/<m>3 of fine aggregate and 4.5-7 kg/<m>3 of a water reducing agent, wherein the modified graphene is water-soluble grapheme of which the surface has hydroxide radicals; the content of the hydroxide radicals is 0.005-0.012 percent. When the modified grapheme is used for preparing high-toughness concrete, first, the modified grapheme can be dissolved in water to form a graphene water solution; then, the graphene water solution and other concrete preparation materials are uniformly mixed, novel high-toughness concrete obtained after curing can show obvious strain hardening or deformation hardening characteristic under the action of direct tensile load or bending load, and can be applied to bridge floors of high-speed rail viaducts and long-span sea-crossing and river-crossing bridges, and various tunnel arches such as subways. The high-toughness concrete is high in technological content and has relatively good application prospect.

The invention belongs to the medicinal preparation field, relates to a cell-penetrating peptide modified nanoparticle, and concretely relates to a nanoparticle delivery system for oral polypeptide and protein medicines, and its preparation method. The medicine delivery system is composed of the nanoparticle, cell-penetrating peptides modified on the surface of the nanoparticle, and the polypeptide protein medicines sealed by the nanoparticle, wherein the average particle size range of the medicine delivery system is 10-500nm. The cell-penetrating peptide modified nanoparticle and glucosaminoglycan having electronegative cell surfaces undergo electric property attraction and then undergo endocytosis, so the cell-penetrating peptide modified nanoparticle and the glucosaminoglycan are integrally taken into cells; and the cell-penetrating peptide modified nanoparticle has an alimentary canal mucous membrane penetrating capability after the cell-penetrating peptide modified nanoparticle is orally taken, and can deliver the polypeptide protein medicines carried by the cell-penetrating peptide modified nanoparticle to the whole body for blood circulation, so the oral biological utilization degree of the medicines are improved. The cell-penetrating peptide modified nanoparticle has the advantages of improvement of the stability of polypeptide and protein medicines in the alimentary canal, reduction of the application amount of cell-penetrating peptides, and reduction of possible toxic side effects caused by the cell-penetrating peptides.

The invention relates to a method for preparing porous membranes based on selective swelling of block copolymers. The method includes the steps of preparing a block copolymer (a block copolymer is formed by a block A and a block B) solution, preprocessing microfiltration basement membranes, coating the block copolymer solution on the processed microfiltration basement membranes, placing the microfiltration basement membranes coated with the block copolymer solution in a drying cabinet for vacuum heat treatment (a block copolymer layer solvent is volatilized to form membranes in the process), submerging the microfiltration basement membranes coated with the copolymer thin membranes in a solvent which has a selective swelling effect on one block of the block copolymer to be processed for a while, and taking out the microfiltration basement membranes coated with the copolymer thin membranes from the solvent for drying to obtain the compound porous membranes with block copolymer layers as separation layers and microfiltration basement membranes as supporting layers. The method is simple to operate, convenient and controllable. Chemical reaction is not involved, the prepared compound membranes have high mechanical strength, neat surface structure, and apparent potential of hydrogen (pH)-stimulus sensitivity, show good separation performances and have broad application prospects.

The invention discloses an acrylate-containing elastic emulsion, which comprises the following raw materials in parts by weight: 1.5 to 2.5 parts of emulsifier, 30 to 45 parts of acrylate, 1 to 5 parts of hydrophilic monomer, 0.5 to 3 parts of cross-linking monomer, 0.01 to 15 parts of vinyl monomer, 0.1 to 1 part of internal cross-linking accelerant, 0.2 to 0.4 parts of initiator and 35 to 50 parts of water. The elastic emulsion can be easily wiped away from a screen mesh by a wet cloth, and also can be completely washed by water, thereby improving the mesh-antifouling performance of a binder and the cleaning performance of the screen mesh. Meanwhile, the invention also discloses a method for preparing the acrylate-containing elastic emulsion, and the method has the advantages of environmental protection and low cost. In addition, the invention discloses a compounded printing binder prepared from the acrylate-containing elastic emulsion, and the prepared binder has the advantages of no mesh fouling, easy mesh washing, clear mesh dot, good elasticity, softness, drying, and excellent color fastness to rubbing and washing fastness, meets various environmental protection indexes, andadapts to various printings by manual bedplates, circular screen machines, and flat screen machines.

The invention discloses a modified bamboo fiber/polymer composite high-toughness concrete and a preparation method thereof. In the method, bamboo fibers are modified successively through a coupling agent and a maleic anhydride grafted terpolymer and are added to an epoxy resin toughening emulsion. With water, the epoxy resin toughening emulsion containing the modified bamboo fibers, a polyurethane toughening emulsion, cement, coal ash, slag powder, a fine aggregate, crushed stone and a water reducing agent are employed as raw materials, the modified bamboo fiber/polymer composite high-toughness concrete are prepared through a stirring and mixing process. A test proves that the high-toughness concrete has a significant strain hardening characteristic or a significant deformation hardening characteristic under an effect of a direct stretch load of a direct bending load. The high-toughness concrete has a bending strength being 17-26 MPa, a compressive strength being 75-92 MPa and a tensile strength being 6-15 MPa. The high-toughness concrete can be applied in fields such as a bridge floor of a long-span cross-sea or cross-river bridge, the bridge floor of a viaduct of a high-speed railway, and various tunnel arch walls, in a subway and the like, and the like.

The invention relates to a kind of globe-form cellulose absorbent with iron carrying and its manufacturing and application. The carrying agent of the invention is globe-form cellulose, and the active center is the hydroxide of iron in the specific form, which has the high absorption activity. The manufacturing feature is as follows: dropwise alkali solution tardily into the solution of cellulose bead and molysite; in stirring condition, iron can load the cellulose bead by dispersing and hydrolyzing; after loading repeatedly and frequently, use the alkali solution to stabilize the ferruginous form. The manufacturing method of the absorbent has the advantages of environmental protection, novelty, simplicity and low cost. Moreover, it can remove arsenic, fluorine and other heavy metal with high efficiency and high selectivity, and the absorbent has excellent usage-prospect in nowadays.

The invention relates to a method for preparing an anti-pollution polysulfone porous membrane by self-assembling immobilization of metal ions. According to surface electrical load properties of a membrane prepared from a polysulfone material, an amino-containing compound with high positive charge density and hydrophily is used as a modification material, the modification material is adsorbed by the surface of the polysulfone porous membrane under electrostatic interaction, through a large amount of amino groups of the modification material, the modification material and Cu<2+>, Zn<2+> or Ag<+> of an inorganic antibacterial agent undergo a coordinated complexation reaction, and the inorganic antibacterial agent is immobilized on the modification material molecule by complexation action so that the polysulfone porous membrane with good hydrophily and antibacterial activity is obtained. The prepared polysulfone porous membrane has hydrophily, antibacterial property and pollution resistance. The method has simple processes, does not need complex equipment and is suitable for industrial scale application. The porous membrane can be widely used in water treatment in the field of environment, chemical engineering, foods and medicine.

The invention discloses a wet smelting method for preparing a natural rubber/nanometer silicon dioxide rubber compound, which comprises the following steps of: mixing natural rubber latex with silicon sol solution to form a wet smelting system; heating the silica sol to generate condensation reaction to generate the SiO2 gel with properties, heating the wet smelting system to generate the silica sol into nanometer silicon dioxide particles in situ and uniformly dispersing the nanometer silicon dioxide particles into NR (Natural Rubber) emulsion to form the NR/ nanometer silicon dioxide rubber compound after condensation and co-precipitation; and mixing the natural rubber latex with a nanometer silicon dioxide dispersing body to form the NR/ nanometer silicon dioxide rubber compound after condensation and co-precipitation. The wet smelting method has the beneficial effects that the mass ratio of natural rubber/nanometer silicon dioxide prepared by the wet smelting method is 100/30-90, and vulcanized rubber of the nanometer silicon dioxide has excellent physical and mechanical properties and is high-quality rubber for preparing truck radial tire tread rubber with high wet skid resistance and low rolling resistance, i.e. green tire.

The invention relates to a hydrophilization modification method of a polyolefin hollow fiber ultrafiltration membrane, especially relates to a method using dopamine or dopamine derivatives for forming a hydrophilic modification layer on the polyolefin hollow fiber ultrafiltration membrane surface and in membrane holes. The method avoids the influence of polyolefin material structure, can effectively maintain the structural and mechanical properties of the polyolefin membrane, and overcomes the shortcomings that modification in the membrane holes cannot be achieved by irradiation grafting and plasma surface grafting technology. According to the method, an ultrathin poly dopamine or dopamine derivative hydrophilic modification layer prepared by the method can be combined firmly with a polyolefin hollow fiber ultrafiltration membrane material may not be lost in the use process, the modified membrane is stable and reliable in properties, and has good application prospects in water treatment, petrochemical, pharmaceutical, biological, energy and other areas.

The invention discloses a preparation method of a bacterial cellulose/graphene oxide nano-composite sphere adsorption material. The preparation method comprises the following steps: preparing a liquid culture medium; adding a graphene oxide aqueous solution, uniformly mixing, then inoculating with strain, namely acetobacter xylinum, carrying out rotating and shaking culture at the temperature of 4-35 DEG C, secreting cellulose by acetobacter xylinum to attach graphene oxide dispersed in the liquid culture medium to the surface, winding and wrapping the cellulose to form a spherical three-dimensional network bacterial cellulose/graphene oxide nano-composite sphere nanocomposite material; and boiling the formed nano-composite material by using a potassium hydroxide aqueous solution, filtering, washing by using deionized water, then freeze-drying to prepare the bacterial cellulose/graphene oxide nano-composite sphere adsorption material. The adsorption material prepared by the method is large in specific surface area, environmentally friendly and low in cost and has the good function of adsorbing radionuclides such as uranyl ions and strontium ions, as well as heavy metal ions in industrial wastewater.

The invention discloses a production method of a cellosilk enhanced compound hollow fiber membrane, which comprises the following steps: by adopting a liquid phase transfer hollow spinning process, firstly, preparing polymer (such as polyether sulfone or polysulfone and the like), solvent and a pore-forming agent into a membrane casting liquid to produce a hollow fibrous membrane; tightly attaching the cellosilk treated by adhesive solution to the outer surface of the prepared hollow fiber membrane; secondly, producing polyvinylidene fluoride or mixture of other polymers, solvent and pore-forming agent into coating liquid of an outer compound layer of the compound hollow fiber membrane; coating the costing liquid outside the hollow fiber membrane to which the cellosilk is attached by using a coating machine to form a compound outer layer; thirdly, feeding into an outer coagulating bath, wherein the solvent, the pore-forming agent and the like in the coating liquid enters liquid phase and the polymers in the coating liquid are precipitated to a polymer compound hollow fiber outer layer due to phase transfer; and finally producing a hydrophilic cellosilk enhanced compound hollow fiber membrane with high strength and high flux.

The invention belongs to the field of conductive composite fiber materials and relates to a preparation method of a copper/modal fiber composite material. The preparation method provided by the invention refers to covering a copper-plated layer on a surface of a modal fiber substrate, and the specific processes comprise modal fiber washing, drying, surface modification, copper ion absorption and reduction, chemical copper plating and the like. The composite material provided by the invention has the following advantages: (1) the mechanical property is good, and the intensity is better than that of the copper/cotton composite material; (2) the associativity between the copper-plated layer and modal fibers is good and can pass the test of a Scotch adhesive tape in the Minnesota Mining and Manufacturing (3M) Company; (3) the electric conductivity is high and is 0.01-0.3 times that of blocky pure copper; and (4) the absorption capacity is strong and is 50% higher than that of the copper/cotton fiber composite material. The conductive composite fiber material provided by the invention can be extensively applicable to the field of industry, such as antistatic clothing, solar battery electrode, electromagnetic shielding and radar absorbing, and national defence.

The invention discloses a method for preparing super absorbent resin by the graft copolymerization reaction of carboxymethyl potato starch, acrylamide, acrylic acid and sodium salt thereof, which comprises the following main processes: carrying out neutralization reaction between a sodium hydroxide solution and acrylic acid from which polymerization inhibitor is removed under the cooling of ice-water bath; mixing acrylamide with de-ionized water to obtain an acrylamide solution; mixing the carboxymethyl potato starch with the prepared acrylic acid and the sodium salt solution and the acrylamide solution; adding an evocating agent persulfate and a cross-linking agent N,N'- methylene-bisacrylamide; stirring the mixture under room temperature; heating the mixture by water bath to rise the temperature so as to ensure that the carboxymethyl potato starch, the acrylic acid and the sodium salt thereof and the acrylamide generate graft copolymerization reaction under the protection of nitrogen; keeping the temperature of the reaction; drying and crashing to obtain the super absorbent resin with high potassium content by using carboxymethyl potato starch as the raw material. Compared with the similar products, the water absorption of the super absorbent resin is greatly enhanced; the super absorbent resin contains nitrogen nutrition element, does not need pasting in comparison with theprocess of directly using starch and greatly improves the preparation process. The super absorbent resin has great effect on the water conservation, the desert control, the plant growth promotion andthe like of soil in dry regions.

The pectin grain containing milk beverage contains milk product 30-60 weight portions, pectin grain 1-20 weight portions, sugar 4.0-15 weight portions, stabilizer 0.1-1.0 weight portions, edible essence 0.05-0.3 weight portions except water. The pectin grain is obtained through inoculating pyracetic bacillus to fruit juice, fermenting culture, taking upper fiber and crushing. The present invention provides the production of milk beverage containing pectin grain, especially coconut pectin grain.

The invention discloses a method for preparing super absorbent resin by using carboxymethyl potato starch as the raw material, which comprises the following main processes: carrying out neutralizationreaction between a sodium hydroxide solution and acrylic acid from which polymerization inhibitor is removed under the cooling of ice-water bath; mixing carboxymethyl potato starch with de-ionized water; mixing the prepared acrylic acid and the sodium salt solution thereof with the carboxymethyl potato starch solution; adding an evocating agent persulfate and a cross-linking agent N,N'- methylene-bisacrylamide; stirring the mixture under room temperature; heating the mixture by water bath to rise the temperature gradually so as to ensure that the carboxymethyl potato starch and the acrylic acid and the sodium salt thereof generate graft copolymerization reaction under the protection of nitrogen; keeping the temperature of the reaction; drying and crashing to obtain the super absorbent resin by using carboxymethyl potato starch as the raw material. Compared with similar products, the water absorption of the super absorbent resin is greatly enhanced, the process of pasting is omitted incomparison with the process of using starch as the raw material and the preparation process is greatly improved. The super absorbent resin has great effect on the water conservation, the production of the physical hygiene sundries, the environmental improvement, the desert control, the plant growth promotion and the like of soil in dry regions.

The invention discloses a high-temperature colloid protecting anticaving fluid loss additive for a drilling fluid. A preparation method of the high-temperature colloid protecting anticaving fluid loss additive comprises the following steps of: dissolving acrylamide and 2-acrylamido-2-methylpropanesulfonic acid into 10-25 percent mixed aqueous solution; adding acrylic acid, fully stirring and dissolving and then adding a potassium hydroxide aqueous solution; adjusting the pH value to be 7-8; introducing nitrogen gas for protecting for 20-30 minutes; heating to be 50-60DEG C; adding dimethyldiallyl-ammonium chloride, ammonium persulfate and thiol and keeping the contant temperature for 2-5 hours to obtain a colloidal product; washing the colloidal product with acetone; removing an unreacted substance, keeping the constant temperature of about 105DEG C and drying for 2-4 hours; and crushing and sieving the crushed substance by a sieve with 60 meshes to obtain a white powdery product, namely the high-temperature colloid protecting anticaving fluid loss additive for the drilling fluid. According to the high-temperature colloid protecting anticaving fluid loss additive, the stability of high-temperature colloid in a waste-based drilling fluid system can be effectively improved.

The invention belongs to the technical field of preparation of aerogel having a water treatment function, in particular relates to a preparation method of graphene oxide and polyvinyl alcohol hybrid aerogel. The preparation method comprises the following five processing steps: preparing a graphene oxide dispersing solution; preparing a graphene oxide/chitosan mixed solution; preparing a self-foaming solution; preparing a gel solution; preparing graphene oxide/chitosan and polyvinyl alcohol hybrid aerogel. The preparation method is characterized in that the graphene oxide and polyvinyl alcohol hybrid aerogel is prepared by fully mixing the graphene oxide dispersing solution with distilled water, glacial acetic acid and chitosan powder and then adding polyvinyl alcohol, a filling agent, a cross-linking agent, a foaming agent and a catalyst in the mixture. The graphene oxide and polyvinyl alcohol hybrid aerogel prepared by the invention is strong in water absorbing capacity, high in hydrophily and quick in adsorption rate and can be reused after regeneration and can be used for industrial wastewater treatment. The preparation method of the graphene oxide and polyvinyl alcohol hybrid aerogel, disclosed by the invention, has the advantages that the principle is simple, the operation is easy, processing equipment is simple, the cost of raw materials is low, and the preparation method is beneficial for industrialization.

The invention discloses Al18F-NOTA-PEG6-TATE of a targeted somatostatin receptor and a preparation method and application of Al18F-NOTA-PEG6-TATE. The preparation method of the label includes the steps that a somatostatin derivative TATE and a difunctional chelating agent NOTA are connected through PEG to generate a radiolabelled precursor, then positron nuclide 18F labeling is carried out through a one-pot method, and the 18F labeled somatostatin derivative Al18F-NOTA-PEG6-TATE can be obtained. The method can be carried out in an acetate buffer solution system or an acetonitrile reaction system, and the method has the advantages of being easy and convenient to operate and high in labeling rate and product purity. The prepared positron label of the targeted somatostatin receptor can be applied to preparation of a PET/CT molecular probe or tumor therapy medicine, and provides a novel thought for synthesis of the clinical PET/CT molecular probe.

The invention relates to energy ceramic with antimicrobial, easy cleaning and water activation functions and a preparation method for the energy ceramic, and belongs to the field of special ceramic materials. An enamel layer is arranged on the surface of a ceramic blank; the ceramic blank is prepared by the following raw materials in mole percentage: 2 to 10 percent of rare earth material, 2 to 10 percent of high-performance sepiolite material, 6 to 15 percent of high-performance tourmaline material and 65 to 85 percent of functional ceramic mud; and the functional ceramic mud consists of 98 to 99 mass percent of ceramic mud and 1 to 2 mass percent of functional material. The preparation method comprises the following steps of: preparing the functional ceramic mud; mixing the 98 to 99 mass percent of ceramic mud and 1 to 2 mass percent of functional material by a ball grinding machine for 10 to 12 hours to obtain the functional ceramic mud; then preparing the blank, forming and biscuiting; and enameling and performing glaze firing to obtain the energy ceramic. The product is antimicrobial, fresh, easy to clean and sanitary, and can activate water and keep people in good health.

The present invention discloses a medical anti-adhesion hydrogel dressing, which comprises a hydrogel, wherein a methyl propiolate monomer, double or multi-functional group terminated-polyethylene glycol having unsaturated double bond, water and an initiator are further subjected to thermal initiation or photo initiation or radiation initiation polymerization so as to obtain the hydrogel, and the hydrogel has a micron porous structure. According to the present invention, the prepared hydrogel dressing has characteristics of no adhesion to wound, good water absorption and excellent mechanical property, and has a space micro-structure capable of loading drugs or growth factors so as to load various drugs or growth factors, achieve the functionalization treatment of the dressing, and achieve antibacterial, wound healing promoting and other functions.