67results about How to "Improve water absorption rate" patented technology

The invention provides a medical hydrocolloid pressure-sensitive adhesive and a preparation method thereof. The pressure-sensitive adhesive is prepared from styrene-isoprene-styrene block copolymer, ester gum, acetate starch, copal, sodium alginate, sodium carboxymethyl cellulose, phthalate, polyisobutylene, an antioxidant, an auxiliary antioxidant, ammonium persulfate, diethylene glycol vinyl ether, polytrimethyldihydroquinoline and naphthenic oil. The preparation method comprises the following steps: adding the styrene-isoprene-styrene block copolymer, acetate starch, copal, antioxidant and auxiliary antioxidant into a rheometer, and compounding; adding the ester gum, phthalate, polyisobutylene, ammonium persulfate, diethylene glycol vinyl ether and naphthenic oil into the rubber mixture, and compounding; and finally, adding the rest of components into the hot-melt pressure-sensitive adhesive, and compounding to obtain the hydrocolloid pressure-sensitive adhesive. The pressure-sensitive adhesive can be easily peeled from the skin surface, and has the advantages of high water absorptivity and high controllability on water-absorbing capacity when in use.

The invention discloses a multi-layer protective type diaper. The diaper comprises an antibacterial and deodorant fabric layer, a sweat-absorbent and moisture transfer fabric layer, a water-absorptiontype non-woven fabric layer and a surface layer from inside to ouTSide in sequence. The invention further discloses a method for making the multi-layer protective type diaper. The diaper has the advantages of being good in antibacterial effect, high in deodorant capacity and capable of absorbing moisture and releasing sweat.

The invention relates to polysaccharide styptic powder, a preparation method thereof and an application. The preparation method comprises the following steps of using plant native starch and etherified starch as raw materials; treating the plant native starch and the etherified starch by using a microwave oven and glycerol; performing emulsion dispersion on the plant native starch and the etherified starch by using span 80, tween 80 and vegetable oil under the conditions that the pH (potential of hydrogen) is 9-10 and the temperature is 45-70 DEG C; performing crosslinking on the plant native starch and the etherified starch by using sodium trimetaphosphate; performing extraction and skimming on the plant native starch and the etherified starch by using ethyl acetate; washing the plant native starch and the etherified starch by using absolute ethyl alcohol; and drying the plant native starch and the etherified starch by using an oven and performing sterilization so as to obtain the polysaccharide styptic powder. The polysaccharide styptic powder has high biocompatibility, can be directly used for stopping general bleeding, deep bleeding and bleeding of parts at which a surgical tool cannot reach, and is easy and convenient to use. The starch serves as the raw materials of the styptic powder and is non-toxic and non-irritant, the sources of the starch are extensive, the cost is low, a technology is simple and feasible, and the polysaccharide styptic powder has a wide clinical application prospect.

The invention relates to a bleeding stopping starch and an application thereof. The bleeding stopping starch is prepared through redenaturation of denaturated starch in the prior art, and microwave processing. The bleeding stopping starch has the advantages of excellent water absorption effect, safety and stability, has biocompatibility, and can be directly applied to bleeding wounds.

The invention discloses calcium carbonate/bagasse cellulose-based super absorbent resin and a preparation method thereof, and belongs to the technical field of super absorbent resin preparation. Bagasse and modified porous calcium carbonate are used as raw materials, ammonium persulfate is used as an initiator, N,N'-methylene bisacrylamide is used as a cross-linking agent, acrylic acid and acrylamide are used as grafting monomers, and the calcium carbonate/bagasse cellulose-based composite super absorbent material is prepared by adopting an aqueous solution polymerization grafting method. Under the optimal condition, the water absorption rate of the water-absorbent resin reaches 900 g/g or above, and the salt absorption rate (0.9 wt.% NaCl) reaches 135 g/g or above and is higher than thatof a water-absorbent material which is industrially applied at present. The water absorption rate of the material can reach 300 g/g or above within 1 min after water absorption is started, and the salt absorption rate (0.9 wt.% NaCl) reaches 45 g/g or above. Due to rapid water absorption, strong water absorption capacity and salt-tolerant effect, the water-retaining agent has a wide application prospect in the fields of hygienic products for children and adults, agricultural water-retaining materials and the like.

The invention discloses a method for adopting an inverse suspension polymerization to prepare humic acid super absorbent resin. The preparing method specifically comprises the first step of taking decomposed coal, and conducting grinding, sieving and drying treatment in sequence on the obtained decomposed coal to obtain decomposed coal powder; the second step of extracting humic acid in the decomposed coal powder through an oxido-degradation with a nitric acid method after obtaining the decomposed coal powder from the first step; the third step of using acrylic monomer and the humic acid from the second step as the raw material, using N,N'-Methylenebisacrylamide solution as a cross-linking agent, using potassium persulfate solution as an initiator, using span-60 as a dispersing agent and using a sodium hydroxide solution as a neutralizer, and preparing humic acid super absorbent resin through the inverse suspension polymerization in cyclohexane. According to the method for adopting the inverse suspension polymerization to prepare humic acid super absorbent resin, inverse suspension polymerization is adopted to prepare the humic acid super absorbent resin, decomposed coal humid acid is used as a raw material, the humic acid super absorbent resin is prepared on the basis of inverse suspension polymerization, and performance of water-absorbent resin is thus effectively improved.

The invention relates to a nonwoven fabric for air wetting purification, wherein the nonwoven fabric for air wetting purification has a liquid-absorption height of 100-200mm and a wetting tensile strength of 3.0-8.0KN/m; preferably, the liquid-absorption height is 120-180mm and the wetting tensile strength is 5.0-8.0KN/m; and optimally, the liquid-absorption height is 130-160mm and the wetting tensile strength is 5.5-8.0KN/m. A method for preparing the nonwoven fabric for air wetting purification comprises the following steps: mixing water-absorption resin with antibacterial agent as a working solution; coating the working solution onto the nonwoven fabric by using a soaking or coating method; and drying and baking the nonwoven fabric, so as to acquire the nonwoven fabric.

The invention belongs to the field of hemostasis sponges, and relates to a hemostasis sponge and applications thereof. In order to solve the problem of poor water absorption of the hemostasis sponge in the prior art, the technical scheme of the present invention is that various modified starches in the existing technology are adopted, and sodium hydroxide, the modified starch and alcohol are mixed, and are subjected to cross-linking, etherification and other steps to prepare the high water absorption hemostasis sponge. The hemostasis sponge has characteristics of excellent water absorption effect, safety, stability and biocompatibility, and can be directly used for wound surface having blood.

The invention relates to a preparation method of PEGMA/PEGDA hydrogel fibers having an ultrafast-anisotropically water-absorption performance. The preparation method comprises following steps: 1) preparing PEGMA through a polymerization reaction at room temperature; 2) preparing a polymer water solution from the PEGMA and the PEGDA, adding a photo-initiator, performing ultrasound dispersion, stirring the mixture until the photo-initiator is dissolved completely to obtain a PEDMA/PEGDA spinning solution; 3) at room temperature, feeding the spinning solution into a water bath through a spinning spray head by a metering pump, setting an ultraviolet point light source to enable a free radical polymerization reaction of the PEDGA in the spinning solution for preparing primary PEGMA/PEGDA hydrogel fibers; and 4) drafting the primary PEGMA/PEGDA hydrogel fibers to obtain the PEGMA/PEGDA hydrogel fibers. The PEGMA/PEGDA hydrogel fibers are stable in structure and good in water absorption performance. The preparation method has very important significance on development, application and post-processing of hydrogel materials.

The present invention relates to hemostasis starch and applications thereof, wherein modified starch in the existing technology is subjected to denaturation again, and then is subjected to a heat stirring treatment to finally prepare the hemostasis starch. The hemostasis starch has characteristics of excellent water absorption effect, safety, stability and biocompatibility, and can be directly used for wound surface having blood.

The invention relates to a preparation method of a graphene anti-bacterial composition. The composition comprises the following ingredients in parts by weight: 5-45 parts of tea saponin, 10-50 parts of graphene oxide and 0.01-2 parts of a dispersing agent and is prepared by the following steps: step 1, dissolving an appropriate amount of tea saponin into deionized water, so as to form tea saponin solution with the mass concentration of 5%-20%; step 2, adding the dispersing agent into the deionized water, uniformly stirring the mixture, adding the graphene oxide into the deionized water until the concentration of the graphene oxide is 0.2-20 mg/mL, and performing ultrasonic dispersion for 30-240 min, so as to form graphene suspension liquid; step 3, adding the graphene suspension liquid obtained in step 2 into the tea saponin solution obtained in step 1, and performing ultrasonic dispersion for 30-120 min, so as to form tea saponin intercalated graphene suspension liquid; step 4, freezing and drying the tea saponin intercalated graphene suspension liquid obtained in step 3, so as to obtain powdery tea saponin intercalated graphene.

The invention provides a multifunctional antibacterial mattress containing graphene. The mattress comprises a plurality of antibacterial mattress bodies with the same size, wherein each antibacterialmattress body comprises a water locking layer, an antibacterial layer, a water absorbing layer and a waterproof layer; the water locking layer is synthesized from graphene fiber and nonwoven fabric with a spunlace process; the antibacterial layer is one or more of carbon sponge, latex sponge, high-density sponge and graphene fiber. Due to the antibacterial performance of the graphene material, theprepared antibacterial mattress has a remarkable inhibition effect on bacteria, besides, the antibacterial mattress bodies can be dismounted, spliced and replaced with one another, bed mattresses with different sizes can be formed, and a sofa cushion, a camping mat and the like can be formed.

The invention provides a novel fire extinguishing material and a preparation method thereof. According to the novel fire extinguishing material and the preparation method thereof, acrylic acid and acrylamide are used as water-absorbing monomers to be subjected to cross-linking reaction under the action of a cross-linking agent and an initiator so as to generate gel, chitosan is added in the gel preparation process, so that the rigidity of the gel is improved, the water absorption rate of the gel is increased, and the gel is not liable to be dried and cracked at a high temperature; and a surface active agent is further compounded to form a stable and efficient foaming agent, abundant and compact foams are formed through high-speed stirring at the later stage of the cross-linking reaction soas to achieve the fire extinguishing effect, in addition, the formation of gel pores is facilitated by the aid of a stabilizer and a pore-forming agent of sodium carbonate at the later stage of the gel forming process, so that the swelling rate can be greatly increased, meanwhile, ammonium polyphosphate is modified, so that the hydrophobicity and the grafting performance can be improved, and grafting is carried out on the gel by utilizing the cross-linking reaction, so that the fire extinguishing performance can be further improved. The fire extinguishing material has the advantages of beinghigh in fire extinguishing performance, high in speed, good in effect, capable of improving the fire extinguishing efficiency, capable of preventing recrudescence of a fire, low in application cost and suitable for large-scale popularization.

The invention discloses a method for synthesizing a manganese dioxide nanowire composite super absorbent resin. The method mainly comprises the following steps of: preparing a manganese dioxide nanowire through a hydrothermal method; taking three resins such as acrylic acid, acrylamide and 2-acrylamide-2-methyl propanesulfonic acid, the prepared manganese dioxide nanowire, a crosslinking agent N,N'-methylene bisacrylamide and an initiator potassium persulfate as raw materials to synthesize a composite resin; adding the acrylic acid into an ice bath, adding the acrylamide and 2-acrylamide-2-methyl propanesulfonic acid for uniformly stirring, sequentially adding the manganese dioxide nanowire, the crosslinking agent and the initiator, reacting at the temperature of 60-70 DEG C for 4 hours in a staged temperature rise mode, and drying the obtained product in a constant-temperature drying box at the temperature of 80 DEG C. According to the composite resin, the salt tolerance, water absorption rate, gel strength, heat stability, water-retaining property and the like of the resin can be effectively improved, the saline water absorption rate of the composite resin is improved by 25 percent compared with that of the acrylic acid and acrylamide type super absorbent resin, and the lead ion adsorbing capacity is 6.139mg/g.

The invention relates to a making method of easily-cooked red beans.The method comprises the following steps of 1, a soaking step, wherein the red beans which serve as the raw material are soaked with water, and the soaked red beans are obtained; 2, a step of steaming the red beans for pre-cooking, wherein the soaked red beans obtained in the first step are steamed for pre-cooking, and the precooked red beans are obtained; 3, a drying step, wherein the precooked red beans obtained in the second step are slowly dried by means of vapor, rapid drying is conducted subsequently by means of microwave, and dried easily-cooked red beans are obtained; 4, a cooling step, wherein the dried easily-cooked red beans obtained in the third step are cooled at the temperature ranging from 10 DEG C to 30 DEG C, and an easily-cooked red bean product is obtained.The easily-cooked red bean product obtained through the method has the advantages of being easy to cook, capable of keeping the appearance of the red beans complete and not broken basically, easy to rewater and the like, and meanwhile the red beans have better mouthfeel and nutrition.

The invention belongs to the field of biomedical materials, and particularly relates to a preparation method for hydroxyethyl cellulose hemostatic gauze. The hydroxyethyl cellulose hemostatic gauze is prepared by taking hydroxyethyl cellulose as a raw material and combining an ultrasonic processing technique with an electrospinning technique; a series of drying and sterilizing are performed, so that the hydroxyethyl cellulose hemostatic gauze is prepared. Hydroxy propyl cellulose belongs to neutral etherification products, overcomes a defect that the polar group is easy to generate a stimulation reaction to an organic body, and has the characteristics of high water swelling performance and quick hemostatic performance. The hydroxyethyl cellulose hemostatic gauze is nontoxic without stimulation, the process is simple and feasible, and the clinic application prospect is wide.

The invention discloses a preparation method of a high-load modified silica gel dehumidification rotary core, and belongs to the field of dehumidification material preparation. The method comprises the following steps of: (1) drying and purging a sample block of the dehumidification rotary core, then soaking the sample block in water glass, and then purging the sample block with hot air; (2) repeatedly and uniformly spraying the residual water glass in the step (1) onto the sample block obtained in the step (1), and then purging the sample block with hot air; (3) soaking the sample block obtained in the step (2) in a zinc salt solution in a water bath, and adjusting the pH value to an initial pH value by using acid in the reaction process; and (4) washing the sample block obtained in the step (3) with water until the sample block is neutral, and roasting and drying the sample block. According to the method, the modified silica gel dehumidification rotary core which is large in effective load capacity, good in adsorption performance and high in mechanical strength is obtained through twice dipping and metal doping process control.

The invention discloses a delustering high-strength low-elongation viscose fiber and a preparation method and application thereof. The delustering high-strength low-elongation viscose fiber is obtained by subjecting pulp materials to dipping, grinding, squeezing smashing, rubbing, depolymerizing, yellowing, dissolving, filtering, deaerating, ripening, spinning drawing and post-processing sequentially. The delustering high-strength low-elongation viscose fiber meets the technical indexes that the dry breaking strength is not smaller than 3.20cN/dtex, the wet breaking strength is not smaller than 1.70cN/dtex, the strength for generating 5% of elongation in wet condition is not smaller than 0.55cN/dtex, the dry breaking elongation is 13.0%-16.0%, the wet breaking elongation is 16.0%-21.0%, radial water swelling capacity is 22%-26%, and the content of a delustering agent is 0.8%-5%. The delustering high-strength low-elongation viscose fiber is a novel viscose fiber, is lower than a modal fiber in production cost, has great economic benefit and social benefit, and is mainly applied to the production fields of underwear and top-grade woven fabric.

The invention discloses a preparation method of a water superabsorbent polyacrylic resin. An acrylic acid, an acrylate or an acrylic acid derivative as a polymerizable monomer undergoes an aqueous solution polymerization reaction under the action of a surfactant and an initiator to produce the superabsorbent polyacrylic resin. Through combination of aqueous solution polymerization and the surfactant, the water superabsorbent polyacrylic resin is obtained. The water superabsorbent polyacrylic resin can effectively improve the lubricity of the gel after polymerization, can be easily chopped and pelleted, does not easily adhere to a device and is conducive to industrial large-scale production. The preparation method effectively increases the specific surface area of the product and improves water absorbency and a water absorption speed of the product. The water superabsorbent polyacrylic resin can be applied to a water or blood adsorption product, and is particularly used in medical and health work-related products such as adult or baby diapers, or sanitary napkins for women, sanitary napkins and sanitary pads.

The invention discloses a preparation method of environment-friendly grafted modified high-absorbent material, comprising the following steps: (1), neutralizing with acrylic acid; (2), preparing grafted monomer mixed liquid; (3), preparing gelatinized starch solution; (4), graft-reacting; (5), extracting a product. The production method of this material is simple, is easy to implement, is imparted by replacing part of acrylic acid with itaconic acid and sodium lignin sulfonate, environmental friendliness and also enables reduced product cost; in addition, by using organic montmorillonite and taking advantage of own intercalation specificity and nano-scale size, water absorption rate and quantity of the absorbent material are effectively increased; the obtained material has excellent comprehensive performance and promising market prospect.