13results about How to "Keep hydrophilic" patented technology

The present invention relates to a large flat heat spreader with a composite liquid wick, comprising an upper cover plate and a lower cover plate which are connected in a peripheral sealing manner to form a sealed working medium cavity, wherein the sealed working medium cavity is in a vacuum state and is filled with a liquid working medium, wherein the upper cover plate is provided with a first area and a second area, wherein the first area is close to an evaporation end and is provided with a plurality of densely arranged first support columns, and the second area is provided with a plurality of sparsely arranged second support columns, wherein a second liquid wick is placed in the gaps between the second support columns; wherein the lower cover plate is provided with a third area and a fourth area, wherein the size of the third area corresponds to that of the first area and is used for placing the first liquid wick; wherein the size of the fourth area corresponds to that of the second area and is provided with sparsely arranged third support columns, wherein the number and arrangement of the third support columns correspond to those of the second support columns, and the problems of insufficient steam flow space, poor heat transfer performance and poor structural strength in the large flat heat spreader can be effectively solved.

The invention relates to an integrated negative electrode binder for a silicon-based negative electrode, a negative electrode plate and a lithium battery. Wherein the integrated negative electrode binder for the silicon-based negative electrode comprises a polymer and a conductive material; the polymer comprises a polyacrylic acid copolymer modified by a hydrophilic block and a hydrophobic block, the weight-average molecular weight of the polymer is 600,000-800,000, the number-average molecular weight of the polymer is 300,000-500,000, and the polydispersity of the polymer is 1.2-2.5. The silicon negative electrode has the advantages that the mechanical performance of the silicon negative electrode can be improved, the stress generated in the volume expansion of the silicon particles is dissipated, so that the silicon particles are prevented from being broken, and the adhesion to the conductive carbon material is good.

The application discloses a preparation method of a graphene / hexagonal boron nitride heterojunction. The target substrate is subjected to cleaning treatment, and then the surface of the cleaned target substrate is changed into hydrophilicity, so that the film can be well laid on the surface of the substrate, and the wrinkles are reduced. A layer of hexagonal boron nitride is arranged on the surface of the hydrophilic target substrate. A layer of PMMA is spin-coated on the surface of the graphene film to be transferred, and then the graphene film is floated in deionized water. Under the surface force of the deionized water, the graphene film can be stretched based on the PMMA. Then, the target substrate with the surface provided with the hexagonal boron nitride is used to be combined with the graphene film with the PMMA layer spin-coated on the surface in the deionized water, so that the target substrate and the graphene film are combined flatly. Then, drying and heating are carried out at a stepped temperature, the distance between the substrate and the sample is shortened, and the crack area is reduced. Finally, through annealing treatment, not only the PMMA residue is reduced, but also the film can be more closely contacted with the substrate.

This invention provides a silicone / polyurethane / epoxy resin composite emulsion, its preparation method, and its application. It is prepared by the following steps: (1) after dehydration of polyethylene glycol and hydroxyl silicone oil, diisocyanate is added, and the mixture is heated to prepare a silicone / polyurethane prepolymer; (2) a hydrophilic chain extender is added to continue the reaction, resulting in a hydrophilic silicone / polyurethane prepolymer; (3) a diluent and epoxy resin are added, and the reaction yields a silicone / polyurethane / epoxy resin composite resin system; (4) a neutralizing agent is added after cooling; (5) water is added under high-speed stirring to form a silicone / polyurethane / epoxy resin composite emulsion; (6) the diluent is removed by vacuum distillation. The silicone / polyurethane / epoxy resin composite emulsion provided by this invention, when combined with a water-based curing agent, can be used to reinforce glass fiber filter media for lubricating oil filtration. The reinforced filter media can meet the requirements of pleating processes and high-temperature lubricating oil applications at 220℃.

The present invention relates to the field of moisture absorbing and perspiring agents. In order to solve the problem of poor washing resistance of moisture absorbing and perspiring agents in the prior art, a dyeing one-bath moisture absorbing and perspiring agent is disclosed, which comprises the following components in parts by weight: 80-100 parts of polyethylene glycol, 10-20 parts of ethylene glycol, 10-30 parts of fatty alcohol polyether, 15-20 parts of polyethylene terephthalate and 0.5-1 part of catalyst. The moisture absorbing and perspiring agent is stable at high temperature and can be used in the dyeing one-bath process. It can give fabrics excellent moisture absorption and quick drying properties, and has good bonding performance with fabric fibers. The fabric treated with the moisture absorbing and perspiring agent still has good hydrophilicity after washing. The present invention also provides a preparation method of the dyeing one-bath moisture absorbing and perspiring agent. The preparation method generates less wastewater, is environmentally friendly, and can realize industrialized mass production.

The invention provides a method for directionally constructing a micro-nano porous structure between fibers of a fabric so as to enhance the radiation cooling performance of the cotton fabric. In particular to a Janus knitted fabric with radiation refrigeration and one-way moisture conduction functions and a preparation method and application thereof, the front side of the Janus knitted fabric is hydrophilic cotton yarns, and the back side of the Janus knitted fabric is synthetic fibers; after weaving is completed, the reverse side of the Janus knitted fabric is coated with a polymer solution containing inorganic micro-nano particles, and the distance gt of the synthetic fibers is regulated and controlled; the diameter of the inorganic micro-nano particles and the spacing of the synthetic fibers are gt The polymer solution is directionally distributed to the cotton yarn layer due to the spacing of the hydrophilic cotton fibers, and then a micro-nano porous structure is formed among the cotton fibers through non-solvent induced phase separation. According to the Janus knitted fabric prepared by the invention, a micro-nano porous structure is formed in situ between cotton fibers, the surface texture and macrostructure characteristics of the fabric are not influenced, the original hand feeling and hydrophilicity of the fabric are kept, and the Janus knitted fabric has an excellent radiation cooling function.

The invention discloses a reverse osmosis membrane, a preparation method and application in the field of seawater desalination, and relates to the technical field of reverse osmosis filtration. The invention provides a reverse osmosis membrane. The reverse osmosis membrane is obtained by performing activation cross-linking treatment, modification cross-linking treatment and reduction treatment on a reverse osmosis membrane body. The invention provides a preparation method of the reverse osmosis membrane. The preparation method comprises the following steps: S1, preparing the reverse osmosis membrane body; s2, activating and cross-linking treatment; s3, carrying out modified cross-linking treatment; and S4, reduction treatment. The reverse osmosis membrane is applied to the field of seawater desalination. According to the prepared reverse osmosis membrane, the density of a desalination layer is greatly enhanced through two times of modified crosslinking, and the desalination rate and the boron removal rate of the membrane can be obviously improved; negative charges on the surface of the membrane are reduced by reducing carboxyl hydroxyl, so that the anti-pollution performance of the membrane is further enhanced.

The invention belongs to the technical field of water treatment, and particularly relates to an offshore thick oil high-temperature produced water treatment and reinjection system. In order to solve the problem that the impurity removal effect cannot meet the existing reinjection water requirement in the prior art, the invention provides an offshore thick oil high-temperature produced water treatment reinjection system which comprises an oil removal system and a fine filtration system which are communicated with each other, and one end, far away from the oil removal system, of the fine filtration system is further communicated with a membrane filtration system. The membrane filtration system comprises a membrane filtration raw water tank, a security filter, a high-temperature ultrafiltration device and a water injection buffer tank which are communicated in sequence, the membrane filtration raw water tank is communicated with the fine filtration system, and the water injection buffer tank is communicated with a water injection well. The membrane filtration system is arranged, produced water is finely filtered and then sequentially enters the membrane filtration raw water tank, the security filter and the high-temperature ultrafiltration device to be subjected to membrane filtration, the water treatment effect is remarkably improved, the reinjection or discharge requirement is met, and the filtered produced water can be directly injected into a water injection well.

According to the polyvinyl alcohol and the preparation method thereof provided by the invention, the polyvinyl alcohol is prepared by taking 2-acrylamide-2-methylpropanesulfonic acid and dodecyl vinyl ether as reactive compound emulsifiers, and a hydrophilic sulfonic acid group and a soft-segment long-chain alkyl ether chain can be introduced into a polyvinyl alcohol molecular chain; on the basis of keeping the hydrophilicity, barrier property, biocompatibility and biodegradability of the polyvinyl alcohol, the flexibility and hydrolysis resistance of the polyvinyl alcohol are improved.

The application discloses a preparation method of a quaternary ammonium and sulfonated polyether sulfone ultrafiltration membrane, and the preparation method comprises the following steps: 1) sulfonating chloromethylated polyether sulfone by using chlorosulfonic acid as a sulfonating reagent to prepare sulfonated polyether sulfone; 2) preparing sulfonated and chloromethylated polyether sulfone by using 1,4-dichloromethoxy butane as a chloromethylating reagent and concentrated sulfuric acid as a solvent; 3) dissolving the sulfonated and chloromethylated polyether sulfone and a pore-forming agent in a solvent, scraping a film after preparing a casting solution; and 4) immersing the finished membrane in a trimethylamine solution by using trimethylamine as a quaternary ammonium reagent to obtain the quaternary ammonium and sulfonated polyether sulfone ultrafiltration membrane. The prepared ultrafiltration membrane has the advantages of high flux and anti-pollution due to the introduction of quaternary ammonium groups and sulfonated groups.

The application discloses a gradient-wetting Janus ceramic membrane and a preparation method and application thereof. In the preparation, a porous ceramic substrate with hydrophilic double main surfaces is taken, one main surface of the porous ceramic substrate is treated with a solution containing a hydrophobic modifier (without contacting the other main surface), a photocatalyst is loaded on the treated surface, and at least three continuous sub-regions are divided, different-length activation radiation is applied to each sub-region to form a gradient-wetting region with a water contact angle gradually changing along a preset direction, and finally, the photocatalyst is removed and dried. The obtained membrane has an asymmetric structure, one side has precisely regulated gradient-wetting, and the other side remains hydrophilic. When the membrane is applied to scenes such as carbon capture and regeneration of waste heat recovery of gas, the surface wettability of the membrane can be accurately matched with a local thermodynamic and concentration environment along the way, heat and mass transfer can be strengthened, surface self-cleaning can be realized, the performance of the membrane is superior to that of a traditional membrane, and the energy-saving and consumption-reducing potential is great.

The invention discloses preparation and application of a skin extracellular matrix containing human soluble collagen. The skin extracellular matrix containing the human soluble collagen is prepared from the following components: 1 to 5 percent of human soluble collagen, 0.5 to 1.5 percent of tremella extract, 0.1 to 0.8 percent of hyaluronic acid, 2 to 6 percent of dipotassium glycyrrhizinate, golden orange and chrysanthemum water, 0.1 to 1.0 percent of arbutin, vitamin C, 0.13 to 1.5 percent of trehalose, 1 to 6 percent of hydroxypropyl tetrahydropyrantriol, 0.1 to 1.0 percent of scutellaria baicalensis root extract, 2 to 8 percent of butanediol and the balance of water. The skin extracellular matrix containing the human soluble collagen has remarkable moisturizing, repairing and anti-oxidation effects, and is suitable for postoperative skin repairing and daily nursing. The soluble collagen and the hyaluronic acid provide deep moisturizing, the tremella fuciformis extract and the golden orange and chrysanthemum water have anti-inflammatory and soothing effects, and the hydroxypropyl tetrahydropyrantriol and the scutellaria baicalensis root extract are beneficial to enhancing the skin barrier function. In addition, the preparation process of the product can be used for industrial large-scale production.

The present invention discloses a buoyancy device to solve the problem in the related art that the hydrophilicity of the river bank is reduced due to the excessive height of the guardrail protection. The buoyancy device includes a reset device and a plurality of buoyancy members that are sealed and connected in sequence; the buoyancy member is used to be rotatably connected to the river bank, and the buoyancy member has a water retaining working surface; the reset device is used to be installed on a fixed foundation, and it is connected to the buoyancy member so that the buoyancy member has a tendency to rotate close to the water surface. The buoyancy device provided by the present invention has a low installation height requirement, can improve the hydrophilicity of the river bank under the premise of achieving protection, and the protection height of the buoyancy device can change with the change of the water level, thereby achieving dynamic protection of the guardrail.