145results about How to "Good water swelling performance" patented technology

The invention discloses a liquid wound dressing which is characterized by comprising the following raw materials in parts by weight: 100-180 parts of a medical polymer film forming material, 0-20 parts of chitosan, 10-25 parts of polyethylene glycol 400 and 10-28 parts of glycerin, wherein the medical polymer film forming material is one in polyvinyl alcohol and polyvinyl butyral or a mixture of carbomer and one in the polyvinyl alcohol and the polyvinyl butyral. The liquid wound dressing can absorb the wound exudate, can effectively debride, maintains the surface of a wound to be wet, promotes the wound healing and is good in sterilizing effect.

The invention provides a photonic crystal humidity sensor comprising: a substrate which is polyacrylamide gel; a photonic crystal material cured in the substrate, wherein the photonic crystal material is superparamagnetic carbon-coated ferroferric oxide colloidal nanoparticles. The invention also provides a preparation method of the photonic crystal humidity sensor. In the photonic crystal humidity sensor provided by the invention, the polyacrylamide gel has strong water swelling performance, and has different absorptivity under different relative humidity; when ambient relative humidity changes, the absorptivity of the polyacrylamide gel changes, and thus the expansion rate of the polyacrylamide changes; therefore, the band gap of the photonic forbidden band of the photonic crystal material cured in the polyacrylamide gel changes, and finally the photonic crystal humidity sensor shows different colors with the change of the humidity.

The invention relates to a method for increasing oil recovery, which especially relates to of an expansion mobile profile control gel blocking agent. The agent significantly improves its specification regarding water swelling, delay-crosslinking, salt tolerance and temperature. In the invention, it mixes the high polymer polyacrylamide solution with a density of 0.07%~0.2% and boron modified phenolic resin delay-crosslinking agent of 0.05% -0.8%, and controls reaction temperature of gel at 40-100deg.C, and controls the pH value of the solution at 7.2~8.0.

The invention relates to a method for preparing an antibiosis self-expanding material of a one-off cervix dilator. The method comprises the steps of: mixing chitosan or chitosan derivative with polyvinyl alcohol solution; carrying out cross-linking to form compound gel; and carrying out washing, drying, mould-pressing and shaping to obtain polyvinyl alcohol-chitosan or polyvinyl alcohol-chitosan derivative compound compressed sponge which has not only excellent water-absorbing expandability, wet mechanical strength and biological compatibility but also antibiosis and inflammation-diminishing effects. The polyvinyl alcohol- chitosan or polyvinyl alcohol-chitosan derivative compound compressed sponge can be used for preparing antibiosis one-off cervix dilator and can alleviate pain of patients in operation as well as reduce operation difficulty and occurrence of operation complicating diseases.

The invention provides a polymer microsphere for oil field profile control and water plugging and a preparation method thereof. The polymer microsphere is of a three-layer spherical structure, and comprises a positive ion inner core, a middle oleophilic casing layer and an outer layer negative ion hydrophilic casing layer, wherein the positive ion inner core comprises acrylamide, cationic monomers and crosslinking agent copolymers; the middle oleophilic casing layer comprises acrylamide, oleophilic monomers and cross linking copolymers; the outer layer negative ion hydrophilic casing layer comprises acrylamide, anionic monomers and crosslinking agent copolymers. The polymer microsphere prepared according to the invention has the advantages that the particle diameter range is controllable in the dimension range of 1 to 500 mu. m; in the use process, the outer hydrophilic casing layer and the middle oleophilic casing layer are gradually degraded along with the prolonging of the water dissolution time; the inner core has good water absorption expansion performance; the dimension after the sufficient expansion reaches 30 to 1500 mu. m; good expansion performance and good plugging performance are realized. The polymer microsphere is solid powder; the storage is convenient; the stability is high; the validity period is 3 to 5 years; in the use process, the addition of other auxiliary agents is not needed; the polymer microsphere can be fast dispersed in the solvent.

The invention provides a penetration and controlled-release medicament delivery system for low-solubility active medicaments. The system is characterized in that: the system comprises a sheet core consisting of a medicament containing layer and a boosting layer, an isolation coat layer, and a controlled-release coat layer with medicament releasing holes and an unnecessary aesthetic coat, wherein the medicament containing layer comprises the low-solubility active medicaments and hydrophilic polymer support; and the boosting layer comprises penetration-promoting polymer, unsoluble polymer and an osmotic pressure promoting agent. The invention also provides a method for preparing the penetration and controlled-release medicament delivery system, which comprises the following steps of: (1) preparing the medicament containing layer; (2) preparing the boosting layer; (3) preparing the sheet core; (4) coating an isolation coat; (5) coating a controlled-release coat; (6) perforating coating tablets; and (7) coating the aesthetic coat.

The invention relates to high-purity rice bran protein and rice bran fibers, and further relates to a preparation method of the high-purity rice bran protein and the rice bran fibers. The preparation method includes the steps of raw material pretreatment, first size mixing and enzyme reaction, second size mixing and enzyme reaction, separate washing, drying and the like. According to the method, through superfine grinding and amylase and cellulose hydrolyzing, components of defatted rice bran are effectively separated, a whirlcone is utilized to conduct the washing treatment, and therefore separate washing efficiency is greatly improved. Compared with spray drying, flash drying equipment is utilized, investment is saved by about 40%, operating cost is saved by about 35%, in rice bran protein products, the protein content is over 80%, the ash content is below 3%, the fat content is below 0.5%, the protein extraction ratio is over 75%, and in rice bran fiber products, the fiber content is over 70%, the ash content is below 4%, and the fat content is below 1%. The high-purity rice bran protein and the rice bran fibers all can be widely applied to the field of health food, nutritious food and the like, and additional value of rice deep processing is greatly improved.

The invention provides a compound preparation of pioglitazone hydrochloride and metformin hydrochloride bilayer osmotic pump controlled release tablets. The compound preparation structurally comprises the following parts from inside to outside in sequence: a tablet core comprising a drug layer and a digestive layer, an insulation coating layer, a controlled release coating film with drug release holes, a rapid pioglitazone hydrochloride release layer and an unnecessary attractive coating. The invention also provides a preparation method of the compound preparation of pioglitazone hydrochloride and metformin hydrochloride bilayer osmotic pump controlled release tablets. The preparation method comprises the following steps of: (1) preparing the drug layer; (2) preparing the digestive layer; (3) tabletting the tablet core; (4) coating insulation coating layer; (5) coating the controlled release coating; (6) punching the coated tablet: (7) coating the rapid pioglitazone hydrochloride release layer; and (8) coating the attractive coating.

The invention relates to an autoslack remigration pearlgel water plugging control agent which belongs to oil-field injection well water plugging control agent. The chemical water plugging control agent applied to effectively control the contained water when the oil field enters the middle-late phase, has come into the phase of large-dose deep water plugging control. The performance of gel deep water-plugging control agent of chromium gel/complex-ion polymer/resin used in present technology is more excellent than common polyacrylamides gel and acrylamide monomer gel, but the lower remigration, high-deformability and delayed crosslinking can not satify the requirements, so the invention obtains the glue by adopting salt resistance polymer, temperature-resistance polypropeneamino solution with concentration of 0.05-0.4 %, 0.02-0.2 % flocculant, 0.2-0.8 % modified mylar crosslinker, and 0.01-0.1 % cellulose ether disperser, with 60-90 DEG reaction temperature of the prepared solution and 7.2-8.0 of pH value. The gel can be remigrated, have properties of dilatability, high viscoelasticity and delayed crosslinking, and the intensity can be adjusted. The said glue can form gel when injected into the well for 5-7 days, then the gel breaks up after 30 days and remigrates to the deep ground layer to plug the ground layer.

The invention discloses a water quality modifier for shrimp and crab aquaculture and a preparation method of the water quality modifier. The water quality modifier is prepared from the following raw materials in parts by weight: 20 to 30 parts of modified bentonite, 10 to 15 parts of amino acid, 2 to 10 parts of chitosan, 0.5 to 1.5 parts of bacillus, 2.5 to 5.5 parts of nitrobacteria, 1.2 to 2.4 parts of acetylcholin esterase, 3 to 10 parts of nano clay, 2 to 15 parts of corn meal, 2 to 10 parts of active carbon particles, 2 to 5 parts of honey, 2.5 to 6.5 parts of a trace element mixture and 5 to 10 parts of a Chinese herbal medicine extract. According to the water quality modifier for the shrimp and crab aquaculture and the preparation method of the water quality modifier, water balance adjustment for aquaculture can be realized, and aging of the water quality of aquaculture water can be prevented.

Articles coated with a water-resistant coating that absorbs water to provide the water-resistant effect, and desorbs water when the coating is dried, and a method of providing water resistance and corrosion resistance to articles prepared with such coatings. The coating is formed by applying a composition comprising an aqueous solution of a superabsorbent water-soluble polymer precursor, optionally a viscosity modifying agent, and optionally a lubricant onto the surfaces of the article, and curing to form a coating comprising the superabsorbent polymer.

The invention discloses a preparation method of sodium carboxymethyl starch. The preparation method comprises the following steps of: (1) performing cross-linking reaction; (2) performing etherification reaction; (3) performing neutralization reaction; (4) centrifuging; (5) drying; and (6) sieving and packaging. The preparation method has the technical effects that: the sodium content of the sodium carboxymethyl starch prepared by the preparation method is greater than 2.9; strong water absorbing expansion is guaranteed; the dissolution rate of a medicament is promoted; and the bioavailability of the medicament is greatly improved.

The invention relates to a preparation method of edible rice protein. The method comprises the following steps of pre-treating raw materials, crushing, mixing, reacting, separating and washing, drying and the like. According to the method provided by the invention, macromolecular dextrin in rice dreg is washed by using hot water before being aged; impurities in the rice dreg can be separated from protein which is not dissolved in water by crushing and a salt forming reaction of fat; then a cyclone is used for separating and washing so that the separating and washing efficiency is greatly improved; compared with flash drying and spray drying, the preparation method has the advantages that the equipment investment is saved by about 40% and the operation cost is saved by about 35%; the edible rice protein with the protein dry basis content more than 90%, fat content less than 2% and ash content less than 2% is obtained; the extraction rate of the rice protein is more than 85%; the obtained product can be widely applied in food industries, particularly infant foods; compared with a manner of using the raw material rice dreg as a feed, the preparation method has the advantage that the added value of products is greatly increased.

The invention discloses a feed for breeding sows at a gestation period. The feed is composed of following components in percentage by weight: 50-60% of corns, 8-15% of soya bean meal, 25-35% of bran, 2-3% of konjaku flour, 1-2% of calcium carbonate, 0.5-1.5% of calcium hydrogen phosphate, 0.2-0.5% of table salt, 0.05-0.2% of a mildew preventive and 0.5-2% of a microelement premix. The feed disclosed by the invention has very high viscosity, water absorption expansibility, water binding force and fermentation property, and is suitable for pregnant sows; the feed intake of the breeding sows at a lactation period can be obviously improved; the feed is good for improving the individual weight and the litter weight of piglets and is an effective manner for improving the fertility of the breeding sows; the great economic benefits can be brought to the production of large-scale pig farms.

The invention relates to starch compound polysaccharide hemostatic powder and a preparation method thereof. The preparation method comprises the following steps: carrying out enzymatic denaturation on starch to obtain a porous starch solution, dissolving sodium hyaluronate in deionized water to obtain a sodium hyaluronate solution, mixing the two solutions according to a weight ratio of 50-95 parts of porous starch solution to 5-50 parts of sodium hyaluronate solution, stirring uniformly and drying, soaking the dried material in a calcium chloride solution with a certain concentration to carry out ion exchange, and grinding the material into powder after secondary drying. The material provided by the invention has efficient stypticity on wound surfaces, is biodegradable, has the functions of anti-adhesion and moisture retention, and is safe and non-toxic, simple in preparation process and low in cost.

Belonging to the technical field of oilfield chemistry petroleum drilling plugging agents, the invention in particular relates to a gel plugging agent and a preparation method thereof. The preparation method consists of: carrying out hydroxymethylation reaction on formaldehyde and melamine in an alkaline environment to obtain a reactive material A; and carrying out reaction on the reactive material A, an acrylic monomer B, an acrylamide monomer C and a crosslinking agent N, N-methylene bisacrylamide under the action of an initiator D so as to obtain the gel plugging agent. The reactive gel plugging agent can react and solidify in a leakage channel, and is conducive to enhancing the breakage resistance of the plugging layer and reducing repeated leakage.

The invention relates to a suspension emulsion stabilizer and a preparation method thereof, as well as a prepared compound protein beverage and a preparation method thereof, and belongs to the technical field of a food additive. The suspension emulsion stabilizer comprises the following components in percentage by mass of 10-30% of citrus fibers, 20-40% of sodium carboxymethyl cellulose, 5-15% ofsodium stearoyl lactylate, and 20-50% of mono-glyceride of fatty acids and mono-and diglycerides of fatty acids. The invention particularly discloses a compound protein beverage prepared by using thesuspension emulsion stabilizer and a preparation method of the compound protein beverage, and solves the problem of stability under filtration-free condition. The suspension emulsion stabilizer and the compound protein beverage are free from filtration, and a suspension emulsion stabilizer of the compound protein beverage containing completely-suspended plant fibers free from filtration and the compound protein beverage containing completely-suspended plant fibers free from filtration.

The invention relates to a method for preparing foam stabilized soybean fibers. The method comprises the following steps of: performing chemical modification and enzyme treatment on soybean dregs, grinding and thinning, and dehydrating to obtain functional soybean fibers which have stable foam structures and a fine mouthfeel. The prepared foam stabilized soybean fibers have high foam stability, emulsification stability, water absorption expansibility and thixotropy, and can be widely used for processing cake and the like.

The invention provides a hydrogel nano composite material as well as a preparation method and an application thereof. The high-strength hydrogel is prepared by crosslinking lignin and acrylamide, andnano FeS is loaded in the hydrogel by an in-situ synthesis method, so that the raw materials are cheap and readily available, the preparation method is simple, and the process is environment-friendly.The FeS nano-particles in the prepared hydrogel nano-composite material are uniformly distributed in a hydrogel space network to form active sites, so that the hydrogel nano-composite material can continuously play a role in adsorbing and removing heavy metals; meanwhile, the hydrogel contains rich functional groups and can adsorb and remove heavy metals, so that a synergistic composite materialsystem is formed. The hydrogel nano composite material disclosed by the invention has very strong water absorption expansion performance, when flowing through a structural framework, a heavy metal solution reacts with FeS nano particles to form sulfide to precipitate into the interior, the sulfide can be removed along with gel, the effect of adsorbing and removing heavy metals is obvious, and thehydrogel nano composite material has a wide application prospect.

The invention relates to the technical field of food production and particularly relates to a non-fried instant noodle processing technology adopting an aging and steaming method. The instant noodlesare prepared from the following raw materials: 3-6% of silkworm chrysalis protein powder, 4-7% of table salt, 0.4-1% of compound phosphate, 1-3% of an emulsifying agent, 1-2.5% of sa-son seed gum powder, 2-6% of soybean protein powder, 50-55% of wheat flour and the balance of water. The processing technology of the instant noodles comprises the following steps: (1) dough making and aging; (2) dough pressing; (3) shredding and steaming; and (4) microwave-hot air drying, bag sealing and preservation. The instant noodles provided by the invention can effectively overcome the defects of poor nutrients, long rehydration time and poor sensory evaluation existing in instant noodles provided by the prior art.