9results about How to "Increase liquid absorption" patented technology

The invention belongs to the field of electrolyte membranes, and particularly relates to a polymer electrolyte membrane and a preparation method thereof. The method comprises the following steps: 1) uniformly mixing a heterocyclic compound and dihydric alcohol A, carrying out a thermal reaction, sequentially adding dihydric alcohol B and a catalyst, uniformly mixing, carrying out an esterification reaction, and cooling to obtain a base material; and 2) mixing a linear polyether compound and an organic lithium salt into the substrate in an inert gas atmosphere, adding a dispersing agent, uniformly mixing, injecting into a thin film mold, standing for reaction, and drying to obtain the polymer electrolyte membrane. The polymer electrolyte membrane prepared by the invention is short in lithium ion transportation path, high in transmission efficiency and good in ionic conductivity, meanwhile, the surface of the polymer electrolyte membrane is provided with an array structure, the polymer electrolyte membrane can be quickly wetted, excellent liquid absorption rate is shown, and good dimensional stability and performance stability are kept under high-temperature and pressure conditions.

This invention relates to the field of battery separators, specifically to a high-heat-resistant, high-absorbency ceramic separator, its preparation method, and its application. The invention introduces hydroxyl-containing polymers into the coating. Because hydroxyl-containing polymers have good affinity for electrolytes, the ceramic separator exhibits excellent liquid absorption performance, thereby effectively improving the cycle performance of the battery cell. Furthermore, by introducing a boron-containing crosslinking agent into the coating, the borate ions in the inorganic boric acid aqueous solution can act as crosslinking agents to form hydrogen bonds with the hydroxyl-containing polymers, resulting in a crosslinking reaction. Additionally, the copolymerization of 4-vinylphenylboronic acid and ethylene glycol diethylene ether in the organic boric acid solution can form a six-membered ring at high temperatures. Therefore, a three-dimensional network structure is formed within the system over a wide temperature range, improving the skeletal strength of the ceramic separator coating and ensuring both high liquid absorption and improved temperature resistance of the ceramic separator.

The invention relates to the technical field of processing of towels for normal delivery operation kits, in particular to a towel for normal delivery operation kits and a preparation method of the towel. The towel is prepared from the following raw materials in percentage by weight: 30 to 40 percent of polyethylene, 10 to 15 percent of ABS (Acrylonitrile Butadiene Styrene) resin, 10 to 20 percent of spherical microporous silica gel, 4 to 6 percent of glycerol monostearate, 3 to 5 percent of pentaerythritol stearate, 3 to 6 percent of hydrogenated castor oil, 1 to 2 percent of compatilizer, 6 to 9 percent of chitosan and the balance of activated carbon. Meanwhile, the towel also has good toughness and softness and is not easy to break after absorbing blood and amniotic fluid, so that the use comfort of the pregnant woman in the production process is ensured.

The application discloses a kind of battery separators of chitosan aerogel microspheres and CNF composite and preparation method thereof, belong to lithium ion battery technical field.The battery separator includes polyolefin porous base film and the coating layer of at least one side surface of the base film;The coating layer is formed by coating and drying by coating slurry including chitosan aerogel microspheres and CNF;The chitosan aerogel microspheres are porous particles formed after chitosan is crosslinked, freeze-dried and crushed.The application constructs light, multistage pore structure coating layer by chitosan aerogel microspheres and CNF composite, significantly improves the wettability of electrolyte, liquid absorption rate and liquid retention rate of separator under the premise of extremely low weight gain, and has good thermal stability, effectively solves the contradiction that traditional ceramic coating weight and wettability cannot be compatible.

The utility model discloses a kind of high-temperature-resistant batteries, including positive plate, negative plate and the composite separator being set between positive, negative plate, it is characterized in that, the composite separator includes a group of PE separator, two groups of glass fiber separators and two groups of AGM separators, the utility model is placed in the two ends of composite separator by AGM separator with excellent liquid absorption, there is enough electrolyte around pole plate under the different working conditions of battery, glass fiber separator auxiliary electrolyte distribution, when cooperating with AGM separator, glass fiber separator can assist AGM separator to better adjust the distribution of electrolyte, prevent electrolyte excessive gathering or dry in local area, PE separator is placed in the middle, using its good barrier property, so that electrolyte maintains relatively stable distribution state inside battery, reduce acid stratification phenomenon, improve the service life and performance stability of battery.

The application provides a preparation method of a gel polymer electrolyte for energy storage frequency modulation and an integrated battery, and belongs to the technical field of lithium ion secondary batteries and electrochemical energy materials, and can at least partially solve the problems of the existing gel polymer electrolyte, such as the contradiction between mechanical properties and ionic conductivity, poor interface compatibility, weak lithium dendrite inhibition ability, and insufficient thermal stability and flame retardancy. The gel polymer electrolyte prepared by constructing a dynamic covalent cross-linked polyimide-polyionic liquid interpenetrating network and using monatomic iron-anchored phosphorus-doped carbon nitride nanosheets as a multifunctional filler has excellent mechanical properties and high ionic conductivity, and the flame retardancy is greatly improved, and the growth of lithium dendrites can be effectively inhibited. Meanwhile, the integrated battery is prepared by using an ultraviolet light-initiated in-situ polymerization process, which is suitable for the roll-to-roll large-scale production line of existing lithium batteries, and the interface bonding force of the battery is strengthened, the cycle stability is improved, and the high-frequency response requirement of energy storage frequency modulation is met.

The invention relates to the technical field of batteries, in particular to a negative electrode additive as well as a preparation method and application thereof. The preparation method of the negative electrode additive comprises the following steps: mixing polyvinyl alcohol, a template agent, a phosphate buffer solution and a soluble calcium source to obtain a first system; and adjusting the pH value of the first system by adopting alkali liquor, then carrying out solid-liquid separation, and collecting solids to obtain the negative electrode additive. According to the preparation method of the negative electrode additive disclosed by the invention, the addition of the polyethylene glycol can crosslink the template agent to form nanoscale micelles, the particle size of the final hydroxyapatite nanoparticles is reduced, and the negative electrode additive obtained through the cooperation of the raw materials and the steps has a hollow spherical structure, proper particle size and wall thickness and good liquid absorption performance, and can improve the liquid absorption speed of a negative electrode; the infiltration performance of the negative plate is improved.

The invention discloses a discontinuous combination method for multiple oil displacement systems based on a random forest algorithm. The method comprises the following steps: S1, oil displacement system discontinuous combination injection parameter physical simulation optimization; s2, oil displacement system discontinuous combination injection parameter numerical simulation optimization; and S3, establishing a random forest prediction model. The method can accurately reflect the contribution of the discontinuous combined injection mode of multiple oil displacement systems to the oil increasing effect; the method is easy to parallelize, high in overfitting resistance, insensitive to abnormal values and noise, and capable of processing high-dimensional data without feature scaling; according to the method, the correlation between the improved recovery ratio and different influence factors can be accurately analyzed, the importance degree of different factors for improving the recovery ratio is predicted, the comprehensive efficiency improvement index chart for improving the recovery ratio is formed after the factors are integrated, the advantages and disadvantages of an oil displacement scheme to be implemented can be more visually and accurately determined, and the oil displacement efficiency is improved. And technical support is provided for formulating discontinuous combination implementation schemes of multiple oil displacement systems and carrying out economic evaluation and risk analysis.

The utility model discloses a liquid absorption type medical sterile application, which comprises an absorption main body assembly, a coating assembly and a sealing assembly, the absorption main body assembly consists of a top flow guide layer, a water absorption layer and a bottom flow guide layer, and the top of the water absorption layer is coated with the top flow guide layer. A top diversion layer and a bottom diversion layer which are made of wet-strength toilet paper wrap a water absorption layer which is made of a mixture of fluff pulp, polyacrylate super absorbent resin and sodium alginate to form an absorption main body of the application, percolate can be evenly conveyed in the longitudinal direction, and good liquid absorption performance is achieved; the medical application can meet the requirements of special patients with large surgical incisions, much errhysis and the like, so that the liquid absorption effect of the whole medical application is guaranteed, meanwhile, the water absorption layer is made of a high-molecular polymer material, water molecules can be coordinated and combined with hydrogen atoms and oxygen atoms in a high-molecular polymer in a hydrogen bond mode after water is absorbed, the application has the higher water absorption and water locking functions, and the medical application has the better water absorption and water locking functions. Therefore, the effects of protecting the wound surface and preventing bacteria breeding due to damp are achieved.