3116results about How to "Strong water absorption" patented technology

The present invention comprises methods and compositions for delivery devices. More particularly, the present invention comprises methods and compositions for devices comprising a matrix comprising a polymer network and a non-gellable polysaccharide having oxygen and optionally active agents incorporated therein. The matrix may be formed into any desired shape for treatment of compromised tissue or for delivery of oxygen to a localized environment.

Disclosed is a lateral flow assay device to test for the presence and/or amount of a nucleic acid sequence of interest in a sample, the lateral flow device comprising: (a) a sample receiving zone for contacting the device with a sample to be tested; (b) an extraction zone (8) for extraction of nucleic acid from the sample; (c) a nucleic acid amplification zone (18) in liquid communication with the sample receiving zone; and (d) a detection zone (20) for detecting the products, directly or indirectly, of a nucleic acid amplification reaction performed in the nucleic acid amplification zone, said detection zone (20) being, or being locatable, in liquid communication with the amplification zone (18).

The present invention comprises an improved method for refining cellulose that produces a highly refined cellulosic material in combination with a hydrocolloid. The method comprises soaking raw material from primarily parenchymal cell wall structures in an aqueous solution which need not contain an agent to modify the fiber (e.g., a mild alkalizing or alkaline agent and/or solution) using reduced temperatures and pressures, and refining the material with a plate refiner so that a waste water stream is reduced in volume. The mass is dried to produce the HRC fiber. The HRC fiber displays a water retention capacity of about 25 to at least about 56 g H₂O/g dry HRC and retains moisture under conditions that are ordinarily used to remove moisture from materials. The highly refined fiber product can also provide excellent thickening properties and can be used in a wide variety of materials, including edible materials.

The invention discloses a mixed plant culture medium and a preparation method thereof. The culture medium comprises peat and an agricultural and forest residue compositing fermentation medium, wherein the volume proportion of peat to agricultural and forest residue compositing fermentation medium is (30-50):(50-70). The mixed culture medium prepared by the method in the invention has the advantages of balanced nutrition, high nutrition component contents and stable physical property. The mixed culture medium prepared by the method in the invention is reasonable in nutrition structure and convenient for absorption of foliage plants and meets the growth requirement of the foliage plants, thereby improving the culture survival rate and viewing effect of the foliage plants.

The invention discloses porous phosphorus removing ceramic granules with a function of slowly releasing an alkali and a preparation method thereof. The prepared ceramic granules are an environmental material for efficiently removing phosphorus from municipal sewage and industrial wastewater. Based on the basic chemical properties of the phosphorus in water and a phosphorus removing mechanism by chemical absorption, the preparation method of the ceramic granules comprises the following steps of: mixing 20 to 40 mass percent of ordinary portland cement (42.5 level), 10 to 20 mass percent of bentonite, 10 to 20 mass percent of fly ash, 10 to 15 mass percent of calcium oxide, 15 to 25 mass percent of nitrocellulose, 14 to 30 mass percent of xonotlite fiber particle and 0.1 to 0.5 mass percent of pore-creating agent; adding water for stirring the mixture according to a water-solid ratio of 0.35 to 0.45; granulating the mixture into granules with required grain sizes; and after the granules are foamed and solidified, curing the granules by using high-temperature steam to obtain the ceramic granules. The method has the advantages of simple preparation process, readily available raw materials, low cost and wide application prospect in the field of the removing of the phosphorus in water bodies. The prepared ceramic granules have the characteristics of capacity of slowly releasing the alkalis, silicic and calcareous textures, porosity, capacity of continuously and efficiently absorbing and removing the phosphorus and suitability for phosphorus removing systems of the municipal sewage and the industrial wastewater.

The invention relates to a fresh-keeping packaging material and products thereof, belonging to the technical field of packaging. The invention has the technical scheme that a certain proportion of mineral micropowder of kieselguhr or sepiolite or medical stone or bentonite or tephros or perlite and the like is doped into plastics of PE, PP, PVC and the like and paper pulp, and then the mixture is made into thin films, packaging paper or packaging bags or packaging boxes or packaging cases, trays and the like; the characteristics of dispersity, air permeability, adsorbability, far infrared ray and positive and negative ion function and the like of the mineral micropowder are utilized to enable the packaging material to generate micropores, and therefore, the packaging material has a certain air permeability and adsorbability or generates positive and negative ions or far infrared rays; gas and a small quantity of moisture which are generated from packaged articles are discharged from the micropores, and harmful gas is absorbed and transferred, and thereby, the heat value of the packaged articles can be effectively lowered; microbes are killed or restrained, thereby meeting the demands of keeping fresh of live and fresh food and prolonging storage life.

The invention discloses a recycled aggregate medium-dry hard concrete prepared by using building waste, which comprises the following raw materials of coarse aggregate, fine aggregate, a gelatinizing agent, a water reducing agent and water, wherein the gelatinizing agent comprises cement and coal ash, and the coarse aggregate comprises 50-100 percent of recycled coarse aggregate prepared from thebuilding waste. A preparation method of the recycled aggregate medium-dry hard concrete comprises the following steps of: pretreating the building waste, removing impurities, remaining waste concrete, waste bricks and the like; crushing and screening to prepare the recycled coarse aggregate; mixing the recycled coarse aggregate, natural sand, cement and water according to the proportion, adding the coal ash and the water reducing agent, stirring uniformly to obtain a mixture; and squeezing and forming the mixture, curing for 2 days to obtain the recycled aggregate medium-dry hard concrete. The invention solves the problems of worsening ecological environment and the like caused by difficulty in treating the building waste; and the building wastes are used for manufacturing the recycled aggregate for replacing natural aggregate, the increasingly deficient natural aggregate and damage degree to the ecological environment are reduced, and the living environment of human beings is protected. The recycled aggregate medium-dry hard concrete prepared by using the method has high strength and high abrasive resistance, and can be used for building base installations such as city roads, housing constructions and the like.

The invention discloses a preparation method and an application of sulfhydryl/disulfide bond controllable self-crosslinked hyaluronic acid hydrogel and belongs to the field of biological materials. The hydrogel is prepared from a sulfhydryl-hyaluronic acid compound with free sulfhydryl as a raw material; by adjusting the sulfhydryl density (10-60%), the gel temperature (4-37 DEG C) and the molecular weight (0.1M, 0.3M and 1M) of hyaluronic acid, and using the oxidation-reduction transformation characteristics between sulfhydryl and disulfide bonds to control the forming time, degradation time and the mechanical properties of the gel, a controllable and injectable type intelligent hydrogel with a good three-dimensional network crosslinked structure is constructed. Meanwhile, the hydrogel of the type is single in component, avoids the introduction of exogenous toxic substances before and after gel forming, and has good biocompatibility and degradation performance. Based on the research discovery, the controllable self-crosslinked high-polymer polymer can be applied to minimally invasive repairing of tissue engineering in-situ damages and construction of an intelligent adjustable three-dimensional cell culture scaffold.

The invention discloses polyurethane foam with high water absorption performance and high water retention performance and a preparation method of the polyurethane foam and belongs to the technical field of chemical engineering in high polymers. The polyurethane foam is prepared from components in parts by mass as follows: 80-120 parts of polyether glycol, 20-30 parts of diisocyanate, 0.5-55 parts of water-absorbent resin, 20-50 parts of a foaming agent, 0.2-3 parts of a surfactant and 0.2-2 parts of a catalyst through mixing. The preparation method comprises two steps of preparation of a prepolymer and preparation of a foam material. The polyurethane foam has the advantages of high water absorption performance, high water retention performance, high resilience, good compression performance and high stability.

The invention relates to a water-holding and cultivating functional compound fertilizer, comprising a nitrogen fertilizer, a phosphate fertilizer a potash fertilizer, a trace element fertilizer, a compound amino acid, a soil conditioner, an organic matter and the like. In addition, the invention relates to a preparation method of the water-holding and cultivating functional compound fertilizer. The invention also relates to use of the water-holding and cultivating functional compound fertilizer for improvement of the growth characters and/or yield of crops.

The invention discloses a method for synthesizing super absorbent resin by plant straw and raw material selection. In the synthesizing process, the prepolymer of crylic acid and acrylamide serves as polymerized monomer, the saline alkali tolerance of the super absorbent resin is improved while improving water absorption. The invention chooses renewable plant straw with low cost and wide resource as a raw material, effectively solves the problem of processing plant straws, and has important environmental protection value and economic significance.

The dry-land planting agent refers to a kind of droughtresistance crop's nutrient specific to the growth of the plants. The invention is composed of the following components: AU absorber with super strength, carbamide, potassium dihydrogen phosphate, ammonium dibasic phosphate, calcium nitrate, bitter salt, ammonium molybdate, zinc sulfate, manganese sulfate, boracic acid or borax, ferrous sulphate, fulvic acid potassium, disodium edta, fatty alcohol polyethenoxy ether, 6- benzyl aminopurine, melissyl alcohol, potassium naphthylacetic acid, indolebutyric acid, gibberellin, santobrite, potassium sorbate, ketotriazole, penta azole alcohol., thiram, carbendazim, acid brilliant scarlet, humic acid, bluestone, potassium permanganate, potassium chloride, polyethylene glycol, bentonite or water. The invention is featured by sopping, molding moisture, molding fertilizer, withering resistance, disinsection, sterilization, strengthening the effects of the pesticide, accelerating the burgeon of the plants, increasing roots, innocuity, no pollution and low cost.

The invention provides a method for preparing a composite water-retaining agent by adopting plant straws, belonging to the technical field of high-polymer materials. In the invention, the biodegradable plant straws with wide sources and low prices are used as raw materials, and graft copolymerization is carried out on the plant straws and acrylamide, clay, and the like to obtain the composite water-retaining agent with good comprehensive performance, therefore, the cost of the water-retaining agent is effectively reduced, and a new path for the application of the plant straws is sought. Meanwhile, since the composite water-retaining agent also has higher gel strength and saline alkali tolerance, the service performance of the water-retaining agent is further improved, and the service life thereof is prolonged.

The invention discloses a method for preparing a bio-carrier by porous foam polymer modification. The method is used for coating bonding modification of porous foam polymers. The method comprises the following steps of adding one or more cationized porous high-adsorptivity functional materials and one or more cationized polyhydric hydrophilic functional materials into coating modification slurry, mixing the coating modification slurry and a cationic acrylic acid emulsion, carrying out coating bonding of the mixture on one or more porous foam polymers, and carrying out cross-linking curing to obtain the modified bio-carrier having strong adsorbability, hydrophily, surface active functional group diversity, positive surface charges and strong biocompatibility. The method provided by the invention is not limited by structures, shapes, aperture sizes and physical properties of foam polymers and can be widely used for external coating modification of multiple carrier materials. The method provided by the invention has the advantages of convenient and simple operation, low investment and making cost, excellent carrier performances and long service life. The bio-carrier obtained by the method can be widely used in fields of fixed attachment of various microorganisms, and enhanced biological treatment.

The invention provides a bacteriostatic deodorant super absorbent resin. An acrylic acid/acrylate mixed solution is prepared by neutralization of a basic compound and an acrylic monomer solution; a primary crosslinking agent and a primary dispersing agent are added into the mixed solution and uniform stirring is performed; an antibacterial agent is added and uniform stirring is continued; a temperature is raised to a range of 35 DEG C-70 DEG C; an initiator is added for polymerization to form colloid super absorbent resin; granulation and drying are performed on the colloid super absorbent resin in order; a composite bacteriostatic crosslinking agent is added at a temperature in a range of 110-180 DEG C for surface treatment to form the core-shell-type super absorbent resin having a three-dimensional crosslinking network structure. The bacteriostatic agent is one or two selected from a group consisting of an amino acid metal salt ion chelate and a chitosan metal salt ion chelate. The super absorbent resin provided by the invention is applied in sanitation hygroscopic products, has notable bacteriostatic and deodorant properties, has easily available raw materials, has low costs and has huge benefits.

The invention discloses a sterilization and pasteurization material, comprising a substrate, wherein functional groups and sterilization and pasteurization components which can capture bacteria and/or virus are fixed on the surface of the substrate. The substrate is preferably made of non-weaving cloth with water-absorbing property. The invention also discloses a medical protective mask made of the sterilization and pasteurization material. Quaternary ammonium salt, sulfur-contained compounds and sulfoacid-contained compounds which are fixed on the surface of the sterilization and pasteurization material can be specifically combined with cell membranes of bacteria and viruses, actively captures the bacteria and the virus and can cause the sterilized and pasteurized components attached to the surface of the material to rapidly take effect. The sterilization and pasteurization material can rapidly kill the bacteria and viruses in five minutes. The medical protective mask has the functions of sterilization, antivirus, disease prevention, air purification and the like and can prevent the droplet transmission of the viruses.

The invention discloses a sponge calcium alginate medical dressing and a preparation method thereof and belongs to the technical field of medicines. The sponge calcium alginate medical dressing is formed by the following steps of: performing freeze drying on blended solution of sodium alginates with different molecular weights and forming, crosslinking and curing by using calcium ions and treating by using a softening agent. The sponge calcium alginate medical dressing has high flexibility, elasticity, air permeability, abrasive resistance, water absorption, biocompatibility and degradability a good barrier property, and the function of stopping bleeding, is easy to remove, has a flat and crackless surface, can substitute a sponge calcium alginate nonwoven medical dressing, can be used for treating various skin traumas such as wounds, wound surfaces of burns, and the like, prevents bacterial infection, promotes tissue repair and accelerates wound heating. Compared with the sponge calcium alginate nonwoven medical dressing, the sponge calcium alginate medical dressing has the advantages of simple production process, low cost and the like and helps to reduce the medical cost of a patient.