37results about How to "Improve water absorption" patented technology

The invention discloses a fiber foamed concrete and a preparation method thereof. The fiber foamed concrete comprises the following raw materials in parts by weight: 5290 parts of cement, 4965 parts of water, 1.361 part of foaming solution, 1.2964 part of fly ash and 10 parts of fiber. The preparation method comprises the following steps: proportionally weighing the components; sequentially adding the cement and fly ash into a stirrer, proportionally weighing the water, uniformly stirring the mixture by the stirrer, and adding the fiber; preparing and adding the foaming solution; gradually adding the foam into the mixture, and continuously stirring until all the components are uniformly mixed; pouring the mixture into a mold on which lubricating oil is brushed, and curing in a curing chamber; after 24 hours, removing the mold; and respectively curing for 3 days, 7 days and 28 days for experimental detection. The fiber foamed concrete has the advantages of favorable thermal insulation property, favorable compression resistance and favorable bending resistance, and is applicable to a railway bed strengthening layer.

This invention discloses a natural fiber absorbent and highly resilient cotton towel and its preparation method, relating to the field of medical consumables technology and belonging to patent classification number A61Q19 / 00. The method includes opening and mixing bamboo pulp fibers and flax fibers, cross-carding, and air-forming them into a web to obtain a base fabric; sequentially subjecting it to alkali impregnation and washing, ultrasonic treatment, and selective oxidation with TEMPO to obtain an activated oxidized base fabric; then immersing it in a chitosan quaternary ammonium salt solution for electrostatic loading treatment; subsequently immersing it in a crosslinking solution containing nanocellulose whiskers, epoxidized soybean oleic anhydride, and triethylamine for heated reflux crosslinking; finally immersing it in a synergistic bridging solution containing anhydrous citric acid and γ-aminopropyltriethoxysilane, followed by drying and high-temperature heat setting treatment to obtain the final product. This invention significantly improves the absorbency and resilience of the cotton towel, and the product is environmentally friendly and biodegradable.

This utility model discloses an antibacterial bamboo fiber spunlace fabric, including a spunlace fabric body and a structural layer. The absorbent layer of this utility model is made of sponge material, which increases the thickness of the spunlace fabric and has better water absorption, allowing it to retain more moisture. The mesh fabric can make the spunlace fabric body and the absorbent layer more firmly connected and make the spunlace fabric body less prone to tearing, thus improving the strength of the spunlace fabric body. The surface layer is made of interwoven bamboo fiber and hemp fiber, giving the surface a rough surface. The first fiber pad is made of polyester fiber yarn, which has high durability. The second fiber pad is made of cotton fiber, which has good water absorption and can also have a better cleaning effect on stubborn stains. The second cleaning layer is tightly arranged, and the finished product feels close to textiles, making the surface of the second cleaning layer softer, giving the spunlace fabric body a soft cleaning surface.

The application provides a titanium dioxide type low-temperature hydrogenolysis catalyst and a preparation method and application thereof. The catalyst comprises a titanium dioxide carrier and an active component loaded on the titanium dioxide carrier, and the active component comprises scandium oxide and tungsten oxide. The preparation method of the catalyst comprises the following steps: dipping the titanium dioxide carrier in a mixed solution of scandium salt and tungsten salt for a period of time, so that the scandium salt and the tungsten salt are loaded on the titanium dioxide carrier; and then drying and calcining the titanium dioxide carrier loaded with the scandium salt and the tungsten salt, to obtain the titanium dioxide type low-temperature hydrogenolysis catalyst. The catalyst has good sulfur dioxide hydrogenation activity and organic sulfur hydrolysis activity, and can be applied to a process for treating sulfur recovery tail gas at a low temperature of 210-220 DEG C.

The application discloses a nylon composite material, which comprises the following components in parts by weight: aliphatic nylon 60-80 parts; MCA flame retardant 15-35 parts; polyethylene glycol 5-10 parts; and polyether block amide 4-10 parts. The MCA with specific free cyanuric acid content is used in the application, and the MCA generates inert gas due to the high temperature generated by an electric arc in the IPT test, which is beneficial to the rapid outward diffusion of the electric arc. Meanwhile, the polyether block amide as a charge dissipating agent can reduce the electric arc energy and guide the rapid diffusion of the electric arc. Meanwhile, the introduction of the polyethylene glycol can improve the water absorption of the nylon composite material, and the electric arc diffusion is synergized, so that the IPT is further improved. Meanwhile, the nylon composite material has a flame retardancy of 0.8mm V-0.

This invention relates to a bio-based polyamide carbon fiber reinforced material, comprising the following components: 100 parts by weight of pentanediamine polyamide resin; 10-30 parts by weight of furanyl polyester resin; 1-5 parts by weight of chain extender; and 10-50 parts by weight of carbon fiber. The preparation method includes acid-alcohol treatment of the carbon fiber: impregnating the carbon fiber in a liquid of polybasic acid and polyol, heating and dehydrating it, then blending the acid-alcohol treated carbon fiber with pentanediamine polyamide resin, furanyl polyester resin, and chain extender, and curing to obtain the reinforced material. This invention improves the bond strength and water absorption of pentanediamine polyamide and carbon fiber, resulting in a reinforced material with strong mechanical properties, low water absorption, and a certain degree of biomass content.

This utility model relates to the field of textile fabrics, and more particularly to a green and environmentally friendly fabric, comprising a reinforcing surface layer and an environmentally friendly base layer. A heat-melting yarn is disposed between the reinforcing surface layer and the environmentally friendly base layer. The environmentally friendly base layer is made of regenerated cellulose fibers. The top and bottom ends of the heat-melting yarn are fixedly connected to the reinforcing surface layer and the environmentally friendly base layer, respectively. The heat-melting yarn is woven from heat-melting fibers. The reinforcing surface layer is woven from fiber bundles, which include tensile fibers, flame-retardant fibers, absorbent fibers, polyester fibers, and corrosion-resistant fibers. The tensile fibers, flame-retardant fibers, absorbent fibers, polyester fibers, and corrosion-resistant fibers are bundled together to form a tight structure. This invention solves the technical problems of insufficient environmental performance and functionality in traditional fabrics.

The utility model discloses a flame -retardant heat -insulation waterproof moisture -permeable fabric, including polytetrafluoroethylene moisture -permeable membrane, first flame -retardant fiber water -jet felt and second flame -retardant fiber water -jet felt, polytetrafluoroethylene moisture -permeable membrane with first flame -retardant fiber water -jet felt between, through first point shape flame -retardant adhesive and stick together, first flame -retardant fiber water -jet felt with second flame -retardant fiber water -jet felt between, through second point shape flame -retardant adhesive and stick together, wherein, second flame -retardant fiber water -jet felt has multiple pinholes of array, to increase the moisture -permeability of fabric. The utility model discloses a flame -retardant heat -insulation waterproof moisture -permeable fabric, polytetrafluoroethylene moisture -permeable membrane, first flame -retardant fiber water -jet felt and second flame -retardant fiber water -jet felt three layer materials and stick together, second flame -retardant fiber water -jet felt has multiple pinholes of array, and the whole fabric heat protection performance (TPP) is good, and the moisture -permeability is high, and has the function of moisture absorption and sweat -releasing.

This invention discloses a method for preparing an aramid nanofiber-reinforced perfluorosulfonic acid proton exchange membrane, comprising the following steps: S1, mixing aramid nanofibers, a membrane-forming solvent, potassium tert-butoxide, and methanol to obtain an aramid nanofiber dispersion; S2, mixing the aramid nanofiber dispersion and a perfluorosulfonic acid solution, stirring, and degassing to obtain a first mixed solution; S3, mixing the first mixed solution and a coagulant to obtain a second mixed solution, and coating the mixture to obtain a composite membrane; S4, allowing the composite membrane to stand, drying, and annealing to obtain an aramid nanofiber-reinforced perfluorosulfonic acid proton exchange membrane precursor; S5, post-processing the aramid nanofiber-reinforced perfluorosulfonic acid proton exchange membrane precursor to obtain the aramid nanofiber-reinforced perfluorosulfonic acid proton exchange membrane. The introduction of aramid nanofibers in this invention improves the mechanical stability, ion exchange capacity, water absorption swelling rate, and proton conductivity of the aramid nanofiber-reinforced perfluorosulfonic acid proton exchange membrane.

The present application belongs to the technical field of wastewater sampling, in particular to a water body sampling device for industrial wastewater tracing, comprising a mounting part, a sampling mechanism, a detection mechanism, a wiping mechanism and a backflow mechanism; the mounting part comprises a buoyancy disc and a mounting box, the buoyancy disc is fixedly installed on the upper end face of the mounting box; the sampling mechanism comprises a control pump, a conveying pipe and a filter, the control pump is fixedly installed in the buoyancy disc, the filter is connected with the input end of the control pump, and the conveying pipe is connected with the output end of the control pump; the detection mechanism comprises a carrier and a sensing plate, the sensing plate is obliquely installed on the outer wall of the carrier, and the carrier is fixedly installed on the inner wall of the buoyancy disc; the wiping mechanism comprises a sliding block and a wiping layer, the sliding block is slidingly arranged on the outer wall of the carrier, and the wiping layer is elastically arranged on the bottom of the sliding block; the backflow mechanism comprises a storage cylinder and a backflow pipe; through the cooperation of the above structure, the accuracy and reliability of the industrial wastewater tracing data are improved, and the online continuous sampling and detection mode truly meets the high-precision requirement.

This invention belongs to the field of dairy goat feed technology, specifically relating to a total mixed ration (TMR) for dairy goats containing fresh oat hay, its preparation method, and its application. The invention involves chopping fresh oat hay, sequentially spraying it with a functional oil-based compound emulsion and an organic acid salt compound preservative solution, followed by static adsorption and mixing treatment, and then gradient mixing with dry-based raw materials to obtain the TMR. This invention is the first to achieve the direct use of high-moisture fresh oat hay in TMR without fermentation. It utilizes the cell wall fiber network of fresh oat hay as a natural carrier for functional oils, allowing the oils to penetrate into the fiber pores through static adsorption, forming a stable physical encapsulation structure and effectively reducing the rumen hydrogenation rate of polyunsaturated fatty acids. The invention employs a low-starch, high-slow-release fiber gradient energy supply design, combined with the organic acid salt compound preservative solution, to achieve synergistic effects in feed preservation, oil protection, and rumen health regulation.

This invention discloses a tobacco polysaccharide extract and its application in a buckwheat seed soaking agent formulation. The extraction method includes: S1 using waste tobacco leaves as raw material, drying, pulverizing, and sieving to remove impurities before use; S2 extracting polysaccharides from the waste tobacco leaves using a compound enzyme-assisted extraction method, followed by centrifugation to obtain the supernatant, which is the crude polysaccharide solution; S3 decolorizing the crude polysaccharide solution using activated carbon decolorization, then deproteinizing using the Sevage deproteinization method, and purifying it using ion exchange chromatography and gel filtration chromatography to obtain high-purity tobacco polysaccharides. Finally, the polysaccharides are used as the main raw material to prepare a buckwheat seed soaking agent. This invention not only enables the high-value utilization of waste tobacco leaves but also improves the germination rate and yield of buckwheat seeds.

This invention discloses a multi-component active oxygen antibacterial sanitary napkin and its preparation method, comprising a permeation-guiding layer, an active oxygen antibacterial layer, an absorbent core layer, and a leak-proof bottom layer. The permeation-guiding layer has a longitudinal main channel and transverse branch channels. The longitudinal main channel extends along the length of the sanitary napkin, and the transverse branch channels intersect the longitudinal main channel at an angle of °. The preparation method of the multi-component active oxygen antibacterial sanitary napkin includes S1, raw material pretreatment, S2, permeation-guiding layer preparation, S3, active oxygen antibacterial layer, S4, absorbent core layer preparation, S5, leak-proof bottom layer preparation, S6, gradient hot-pressing composite process, S7, cutting, and S8, low-temperature ultraviolet sterilization and packaging. By setting an absorbent core layer, this application saves space while increasing the filling amount of the absorbent core layer. Due to the increased amount of absorbent core, the absorbency of the absorbent core layer can be increased, thereby improving the absorbency performance of this application.

The invention discloses a preparation method of anthocyanin-loaded oxidized nanocellulose / chitosan elastic composite aerogel, which comprises the following steps: mixing and stirring oxidized nanocellulose dispersion liquid and chitosan solution, adjusting the pH value, adding epichlorohydrin for primary crosslinking, dialyzing to remove redundant unreacted epichlorohydrin, and freeze-drying to obtain the anthocyanin-loaded oxidized nanocellulose / chitosan elastic composite aerogel. The preparation method comprises the following steps: taking oxidized nanocellulose as a raw material, adding chitosan into the oxidized nanocellulose solution, soaking with a silane coupling agent KH570 solution, carrying out secondary crosslinking, drying, putting into an anthocyanin solution, soaking, carrying out anthocyanin loading, and freeze-drying to obtain the anthocyanin-loaded oxidized nanocellulose / chitosan elastic composite aerogel. The composite aerogel prepared by the invention has good mechanical stability and rebound resilience, can be repeatedly extruded, has good water absorption, and has antibacterial property after loading anthocyanin.

This invention provides a ceramic proton exchange membrane for microbial fuel cells and its preparation method, comprising the following steps: mixing clay, an inorganic modifier, and an organic modifier to obtain a solid powder; the inorganic modifier is alumina and silicon dioxide, and the organic modifier is selected from one or more of wheat flour, biochar powder, straw powder, and bamboo powder; the solid powder is ball-milled, granulated, pressed into sheets, and calcined to obtain the ceramic proton exchange membrane. This invention addresses the problems of poor mass transfer performance and low power generation performance of traditional pure clay ceramic membranes. Using clay as the matrix material, and through specific inorganic and organic modifiers, the pore structure of the material is adjusted. A novel ceramic proton exchange membrane is then prepared through ball milling, granulation, pressing, and calcination. This membrane has low manufacturing cost, good proton transport efficiency, and extremely low internal resistance. When applied to microbial fuel cells, it can achieve higher output voltage and more stable power generation performance.

The embodiment of the application discloses a cooking method and device, a cooking equipment, a storage medium and a program product, wherein the method comprises: in a first constant temperature stage of a water absorption stage, controlling a heating assembly to maintain the temperature of food materials in a cooking cavity in a first temperature range within a first time range; the first time range and / or the first temperature range is an environmental condition for destroying the seed coat structure of coarse grains; in a cooling stage of the water absorption stage, the temperature of the food materials is cooled from the first temperature range to a second temperature range; the upper limit value of the second temperature range is less than the lower limit value of the first temperature range; in a second constant temperature stage of the water absorption stage, the pressure of the cooking cavity is changed through a ventilation assembly in the cooking cavity to promote water absorption of the food materials; in a curing stage after the water absorption stage, the food materials are cured through the control of the heating assembly to promote rapid cooking and curing.

This utility model discloses a wearable catheter fixation strap, relating to the field of medical tool technology. The wearable catheter fixation strap includes two connectors, with an elastic bandage fixedly disposed between the opposing surfaces of the two connectors. It also includes a first elastic band disposed on the outside of the elastic bandage and fixedly connected to the connectors, with a female buckle on the first elastic band. A male buckle is detachably mounted on the female buckle, and a second elastic band is fixedly connected to the other connector on the male buckle. Connecting straps are fixedly disposed on both connectors, and the connecting straps have extension straps for tightening the catheter. A female Velcro strap is disposed on the connecting strap, and a male Velcro strap is disposed on the extension strap. The male Velcro strap and the female Velcro strap cooperate to connect the extension strap and the connecting strap. This wearable catheter fixation strap can securely wear the catheter on the patient, and is convenient and comfortable to wear.

This invention discloses a high-humicity microbial fertilizer and its preparation method, belonging to the field of microbial fertilizer technology. The method involves adding a mixed carrier, a protective agent, and fermentation broth to a stirred tank in a specific ratio, followed by shaking and adsorption, filtration, and drying with forced air until the moisture content of the absorbent resin powder reaches 30-35%. The powder is then continuously granulated using a granulator and sieved to obtain microbial agent granules with a particle size of 2-5 mm. The microbial agent granules and sodium humate are mixed at a mass ratio of 1-2:10 to obtain the high-humicity microbial fertilizer. The aggregated short fibers, under the adhesive and physical entanglement effects of the protective agent, increase the internal space of the microbial agent granules while improving structural stability, providing a stable growth and reproduction environment for microorganisms, and improving the long-term storage of the fertilizer and the survival rate of microorganisms after application. The enlarged microbial agent granules provide support, increasing soil looseness and providing a good respiratory environment for crop roots.

The purpose of this invention is to disclose a process for preparing highly absorbent brain cotton pads, relating to the field of brain cotton preparation technology, including the following steps: preparing a hydrophilic spunlace nonwoven fabric layer; mixing sodium polyacrylate superabsorbent resin powder and fluffy cotton fibers in a mass ratio of (3~5):1, and molding them by molding or air-flow web forming process to form a superabsorbent preform layer; laying the mesh layer on the surface of the superabsorbent preform layer; hot-pressing the mesh layer and the superabsorbent preform layer together by a first hot-pressing process to form a superabsorbent composite layer; laying annular development lines around the edge of the superabsorbent composite layer to form a superabsorbent intermediate layer; bonding the superabsorbent intermediate layer and the hydrophilic spunlace nonwoven fabric layers on its two surfaces together by a second hot-pressing process to obtain a brain cotton pad substrate; hot-pressing the edge of the brain cotton pad substrate by a third hot-pressing process to form annular hot-pressing zones. The beneficial effect is that the brain cotton pad can absorb no less than 4.5 times its own weight in blood or body fluids.

This utility model discloses an incontinence-eliminating and odor-removing sanitary pad, comprising: absorbent particles, first absorbent particles, a soft cotton surface layer, a flow-guiding layer, and a leak-proof layer. The soft cotton surface layer is disposed above the flow-guiding layer, and the leak-proof layer is disposed below the flow-guiding layer. A first filling groove is recessed in the top surface of the flow-guiding layer, and the first absorbent particles are disposed in the first filling groove. A second filling groove is recessed in the top surface of the flow-guiding layer, located outside the first filling groove, and the absorbent particles are disposed in the second filling groove. This incontinence-eliminating and odor-removing sanitary pad increases absorbency, meeting the needs of women with urinary incontinence, reducing side leakage of urine and odor from the sides, and effectively locking in odor during use.

The present application relates to a one-way moisture-conducting and quick-drying knitted fabric, the pattern of the knitted fabric is taken as a cycle of twelve routes, the organization structure of the first route, the second route, the fifth route, the sixth route, the ninth route and the tenth route of the front surface is in turn float and loop; the organization structure of the third route, the fourth route, the seventh route, the eighth route, the eleventh route and the twelfth route of the front surface is in turn loop and float; the organization structure of the first route, the second route, the seventh route and the eighth route of the back surface is in turn loop and loop; the organization structure of the third route, the fourth route, the fifth route, the sixth route, the ninth route, the tenth route, the eleventh route and the twelfth route of the back surface is in turn float and float. The knitted fabric of the present application adopts cotton yarn on the front surface and presents delicate check pattern on the back surface; adopts waterproof, oil-proof and dirt-proof nylon and passes through specific soft finishing agent and specific amount of water-absorbing and quick-drying auxiliary agent, so that the knitted fabric has soft and cool touch and water-absorbing and quick-drying characteristics.

This invention provides an anti-adhesion dressing for promoting burn wound healing and its preparation method, to solve the problem of dressing adhesion to wound tissue caused by excessive gap on the side in contact with the wound; the anti-adhesion dressing for promoting burn wound healing and its preparation method, wherein the anti-adhesion dressing is used in combination with an upper and lower layer, wherein the upper layer is a moisturizing layer and the lower layer is an anti-adhesion film, wherein the anti-adhesion film is composed of microfibers and the moisturizing layer is wet gauze or hydrogel.

A dehumidifier, which comprises a casing, a base, a refrigeration system and a water collecting box; the base is internally provided with a containing cavity, which has a taking and placing opening; the refrigeration system comprises a compressor, a condenser and an evaporator; the evaporator is arranged above the base; the water collecting box is arranged in the containing cavity in a push-pull manner at the taking and placing opening; the side wall of the containing cavity is provided with a first sliding groove, which comprises a first straight section, a second straight section and a first lifting section; the first straight section extends to the taking and placing opening; the outer wall of the water collecting box is provided with a first sliding part; in the process of pushing the water collecting box into the containing cavity, the first sliding part can slide into the containing cavity along the first straight section, the first lifting section and the second straight section in sequence, so that the water collecting box first keeps enough distance with the top side wall of the containing cavity, then gradually increases the height of the water collecting box, gradually reduces the distance between the water collecting box and the top side wall of the containing cavity, and further avoids affecting the normal work of the water suction pipe and the micro switch and other devices, and solves the collision problem during taking and placing the water collecting box.

The application relates to a light-weight concrete insulation board and a preparation method thereof, and belongs to the technical field of building insulation boards. The light-weight concrete insulation board is mainly prepared from the following components: cementing material 350-400 parts by weight, light-weight aggregate 71-81.5 parts by weight, additive 10-17.5 parts by weight, foaming agent 1.5-2.0 parts by weight, reinforcing fiber 0.8-1.2 parts by weight, silica sol 2-3 parts by weight and water 160-200 parts by weight. The light-weight concrete insulation board provided by the application can significantly improve the insulation performance on the basis of guaranteeing mechanical properties such as compressive strength, and can guarantee the anti-freezing performance of the insulation board under low-temperature conditions.

This invention relates to the field of wastewater treatment technology, and more particularly to a method for enhancing anaerobic ammonia oxidation (AAO) denitrification using iron-loaded polyurethane porous materials. The method includes the following steps: Anaerobic ammonia oxidation sludge, iron-loaded polyurethane porous materials, and wastewater containing ammonia nitrogen and nitrite nitrogen are thoroughly mixed in an anaerobic reactor and reacted under anaerobic conditions at a temperature of 31-35°C. The iron-loaded polyurethane porous materials are prepared as follows: polyurethane sponge is selected as a carrier, cut and cleaned, and then immersed and stirred in a mixed iron salt solution for a period of time. The pH of the mixed solution is adjusted to alkaline, resulting in the formation of a red precipitate. The iron-loaded polyurethane porous materials are then hydrothermally synthesized. The mixed iron salt solution includes ferric chloride and ferric nitrate. The carrier material prepared by this invention, when applied to an anaerobic ammonia oxidation system, can effectively shorten the process start-up time, promote the enrichment and biofilm formation of anaerobic ammonia oxidizing bacteria, and achieve a high total nitrogen removal rate.

The utility model discloses a kind of parallel recovery devices of proton exchange membrane fuel cell engine hydrogen system, comprising: outer shell, the outer shell top is equipped with opening and detachable protective cover, the inside of the outer shell is equipped with first installation box and second installation box arranged side by side, the utility model uses parallel dryer group to process electric pile tail gas, significantly improves drying efficiency and system stability. Two dryers work synchronously, double the water absorption capacity, cope with high-humidity large-flow condition;More provide operation redundancy, when single dryer saturation, another can still maintain operation, guarantee reliability. The middle section of the curved pipe connecting two dryers is embedded with a ball tube buffer cavity, when system pressure fluctuation may cause siphon, gas in the cavity forms a physical barrier, effectively prevents gas reflux impact on the stack, protects the safety of core components.

This invention belongs to the field of aggregate strengthening, specifically relating to a silicon-based composite reagent-strengthened recycled aggregate and its preparation method. The preparation method includes the following steps: crushing and sieving virgin mortar samples, then rinsing to remove impurities to obtain low-quality recycled coarse aggregate; then, under certain conditions, adding lime slurry and surfactant to the low-quality recycled coarse aggregate, stirring, and allowing it to stand, followed by cyclic stirring; then adding water, a hydrophobic agent, silica fume, and fly ash, and maintaining standing for 6–12 hours; finally, immersing in water to remove soluble impurities from the surface of the recycled aggregate, and air-drying to obtain the silicon-based composite reagent-strengthened recycled aggregate. This method, by comprehensively utilizing industrial by-products such as silica fume and fly ash, explores the application potential of industrial waste products in the field of construction solid waste resource utilization, increases resource utilization rate, efficiently utilizes industrial solid waste, and is conducive to resource conservation and the reuse of waste.

The utility model relates to a kind of breathable deformation thermal comfort silk jacquard double-sided cloth fabric, including the 12-way yarn of circulation arrangement.The yarn of 1st, 2nd, 7th and 8th is extinction breathable deformation silk DTY as fabric front, and the yarn of 3rd, 4th, 5th, 6th, 9th, 10th, 11th and 12th is extinction DTY as fabric back.Two kinds of yarn are matched and coordinated, not only guarantee fabric structure stability, but also extinction characteristics avoid glaring reflection, in addition, the knitting structure is further promoted air circulation on the basis of yarn breathable, avoid the stuffy feeling of wearer due to sweating, always keep refreshing and comfortable.

This invention belongs to the field of polymer synthesis and application, specifically relating to a method for preparing a biodegradable superabsorbent resin. By introducing starch and titanium nitrile carbon nanomaterials into the polymerization system and adjusting various process conditions, this invention obtains a temperature- and salt-resistant, pressure-resistant, biodegradable superabsorbent resin. This improves upon the shortcomings of ordinary polyacrylamide series superabsorbent resins, which, although possessing high water absorption rates, exhibit poor temperature and salt resistance, low gel strength after water absorption, are non-degradable, and lack pressure resistance. The resin prepared by this invention is a biodegradable and environmentally friendly resin, suitable for applications such as oilfield water injection and leak sealing, environmental wastewater treatment, agricultural and forestry soil and water conservation, agricultural water storage, and sanitary materials.

The application provides a diaphragm for a vanadium redox flow battery and a preparation method thereof, and solves the problems of high vanadium ion permeation rate and high price of the current diaphragm Nafion117 membrane of the vanadium redox flow battery. First, polyether ether ketone particles are completely dissolved in concentrated sulfuric acid to make the two react and generate sulfonated polyether ether ketone, and in the process, the sulfonation degree of the sulfonated polyether ether ketone is controlled by changing the reaction time and the reaction temperature; then the obtained solution is poured into a container containing a large amount of ice water mixture, and stirring is continuously carried out during pouring; after standing, the obtained precipitate is washed to neutral, filtered and dried to obtain the sulfonated polyether ether ketone; and then the obtained sulfonated polyether ether ketone is dissolved in a DMF solution, spin-coated into a film, dried, shaped and peeled to obtain the diaphragm.