370 results about "Hygroscopicities" patented technology

The invention discloses a transparent composition photoresist with low shrinkage and low vacuum deflation. Comprising the following raw materials in percentage by mass: 1-5% of modified polyhedral oligomeric silsesquioxane (POSS), 1-5% of an expanding monomer, 1-5% of modified acrylic resin, 1-5% of epoxy resin, 1-5% of a thiol cross-linking agent, 1-5% of an initiator, 0.1-3% of a curing accelerator, 0.2-0.5% of a flatting agent, 0.1-5% of a silane coupling agent, 0.01-0.2% of an antioxidant and 80-90% of an electronic-grade organic solvent. The invention also provides a preparation method of a cured coating prepared from the transparent composition photoresist with low shrinkage and low vacuum deflation. The product provided by the invention not only can maintain the properties of high hardness, high thermal stability, high planarization ability, high barrier property, low hygroscopicity, low dielectric constant and the like of the transparent composition photoresist coating, but also can enable the transparent composition photoresist coating to have excellent low shrinkage and low outgassing, thereby achieving the purposes of saving energy, reducing emission, reducing cost and improving efficiency; the low shrinkage of the transparent composition photoresist coating also widens the development of the material in the fields of other panel production processes such as OLED (Organic Light Emitting Diode) and the like.

A method for determining the water content of a hygroscopic fluid. The method includes inserting an amount of hygroscopic fluid into a fluid ejection cartridge; attaching the fluid ejection cartridge to a fluid ejection device; activating the fluid ejection cartridge to dispense a predetermined number of fluid droplets from one or more nozzles of an ejection head attached to the fluid ejection cartridge onto a substrate to determine a total mass of the fluid droplets dispensed, a velocity of the dispensed fluid droplets or a combination of the total mass of the fluid droplets dispensed and the velocity of the dispensed fluid droplets; and using an information database that correlates the water content of the hygroscopic fluid to an average mass per fluid droplet dispensed and the velocity of the fluid droplets dispensed to determine the water content of the hygroscopic fluid.

The invention provides a low-coupling flexible self-powered multi-mode sensor and a preparation method and application thereof, and belongs to the technical field of flexible electronic materials. Comprising a temperature sensing layer, a pressure sensing layer and a humidity sensing layer which are stacked in sequence. The temperature sensing layer is made of a PEDOT: PSS / MWCNT composite material and outputs a temperature response signal through resistance change; the pressure sensing layer is formed by combining a PDMS layer with a micro-nano structure and a PET layer, and outputs a pressure response voltage signal based on a triboelectric effect; the humidity sensing layer is composed of PVA / CA composite matrix and EGaIn liquid metal, and humidity response signals are output through hygroscopicity induced resistance change. The sensor realizes simultaneous detection of three physical quantities of temperature, pressure and humidity, has low coupling degree among the sensing units, and can be applied to the fields of robot interaction, wearable health monitoring and environment monitoring.

The invention belongs to the field of microorganisms, and particularly relates to a biochar-based immobilized microbial agent for promoting litter decomposition and a preparation method thereof.The biochar-based immobilized microbial agent for promoting litter decomposition comprises a biochar-based culture medium and a microbial seed solution, the active ingredient of the microbial seed solution is phanerochaete chrysosporium, and the preservation number is SHBCC D13411. According to the invention, the adsorption efficiency of the microbial agent is enhanced through the iron-modified biochar, and a habitat suitable for development and reproduction is provided for microorganisms; on the other hand, the biochar has very strong hygroscopicity, water molecules can be adsorbed on the surface, and a suitable growth environment is provided for microorganisms, so that the microorganisms are promoted to decompose litters.

The invention discloses a preparation method of a combustion type warm cloud catalyst, the combustion type warm cloud catalyst comprises a first slurry and a second slurry, the first slurry and the second slurry are prepared by layered inclined pouring and curing, the first slurry comprises 35%-70% of an oxidizing agent, 3%-8% of a combustion agent, 10%-16% of a moisture absorbent and 13%-21% of an adhesive, the second slurry comprises 60%-70% of an oxidizing agent, 15%-17% of a combustion agent and 13%-25% of an adhesive. Through a method of layered pouring of two medicaments, hygroscopic salts are thoroughly isolated from external water vapor, the problem of moisture absorption failure caused by long-term storage is solved, the components and proportions of the oxidant and the incendiary agent are optimized, the combustion temperature is changed, the diameter of aerosol particles generated after combustion is controlled, and the problem of poor moisture absorption is solved.

The invention relates to the technical field of molten salt treatment, and discloses a molten salt recovery system based on a steel belt cooling granulator. The system comprises a molten salt physical property monitoring module, a viscosity modeling module, a cooling optimization module, a partition temperature control module, a phase change monitoring module, a dynamic adjustment module, a particle size analysis module, a quality grading module, a pneumatic conveying module and a waste heat recovery module. The progressive crystallization control of the molten salt particles is realized; a heat pipe type heat exchanger and an organic Rankine cycle system are integrated at the waste heat recovery end, so that comprehensive energy consumption is reduced; the environment regulation and control end monitors the workshop temperature and humidity in real time based on a dew point calculation model, and the long-term stability of hygroscopic fused salt particles is guaranteed. According to the method, four technical bottlenecks of out-of-control crystallization, energy waste, classification loss and environmental interference in fused salt recovery are overcome, and low-cost, high-purity and zero-waste fused salt resource recycling is realized.

The application discloses a kind of imitated plant leaf hydrogel composite material and preparation method thereof, belong to bionic composite material field.The application first by colorant compounding preparation printing paste, and fabric is printed, obtain the green fabric that can realize to plant leaf " green peak " and " red edge " spectral characteristic simulation, and with green fabric simulation leaf structure in fence organization and skeleton;Then with biomaterial polyvinyl alcohol (PVA) as base material, join with strong hygroscopic monomer and crosslinking agent, initiator blend preparation hydrogel prepolymer solution;Finally, hydrogel prepolymer solution is poured into the mold containing green fabric and copolymerization, it directly forms hydrogel in fabric surface and pore interior, obtains imitated plant leaf hydrogel composite material.The material gets rid of the dependence on hygroscopic salt, has water absorption and simulation effect stable, durability is good and the like advantages.

The invention belongs to the technical field of functional materials, and particularly relates to moisture power generation fabric and a preparation method and application thereof. The moisture power generation fabric comprises a fabric substrate modified with a conductive and hydrophilic reinforcing material, and a surface coating area of the fabric substrate is loaded with a moisture absorption power generation functional material. The proton transmission efficiency is improved through a specific charge transfer effect and an ion occupancy effect among components of the moisture absorption and power generation functional material, and the permanent asymmetric moisture absorption difference on two sides of a coupling interface of a coated area and an uncoated area is used as a stable driving force for proton transmission, so that lasting direct current output is formed. The power generation performance of the moisture power generation fabric is determined by power generation composite parameters (namely the product of stable power generation time and the sum of relative humidity and temperature under the same weight and the quotient of the product and the water evaporation difference value on the two sides of a coupling interface), and the power generation composite parameters and the power generation composite parameters are in a nonlinear relation of increasing and then decreasing. Therefore, the power generation performance of the moisture-induced all-weather sustainable power generation fabric can be quantitatively controlled and optimized by adjusting the power generation composite parameters.

The invention discloses a warp-resistant mineral reinforced PC / PBT alloy material with dimensional stability and a preparation method thereof, and relates to the technical field of polymer composite materials. The preparation method comprises the following steps: weighing polycarbonate, polybutylene terephthalate, ureido pyrimidone-polydimethylsiloxane, epoxy polyhedral oligomeric silsesquioxane, polyimide coated halloysite nanotubes, magnesium-aluminum hydrotalcite, perfluoroalkyl modified boron nitride nanosheets, liquid crystal polymer microfibers, modified PVA (Polyvinyl Alcohol) fibers and a silane coupling agent KH550 according to a ratio; the preparation method comprises the following steps: pre-mixing polycarbodiimide and a composite antioxidant to obtain a mixture, mixing, adding into a double-screw extruder, extruding and granulating, drying, carrying out injection molding, and standing at constant temperature and constant humidity to obtain the composite material. The invention has the significance of providing the PBT / PC alloy material with dimensional stability, warping resistance, low shrinkage rate, low hygroscopicity, creep resistance, impact resistance, arc resistance and chemical corrosion resistance for consumer-grade and industrial-grade underwater plastic parts.

The invention discloses a flexible packaging material and a preparation method and application thereof. The flexible packaging material comprises a sandwich structure formed by sequentially stacking a polymer elastomer with a viscoplastic surface layer, a self-adaptive gas barrier layer and a polymer elastomer with a viscoplastic surface layer, wherein the viscoplastic surface layer of the polymer elastomer consists of a non-polar viscoelastic molecular network and a plastic polar polymer microdomain; the self-adaptive gas barrier layer is at least one of liquid metal, hygroscopic gel and viscous hygroscopic liquid; and the viscoplastic surface layers of the upper and lower polymer elastomers are respectively contacted with two surfaces of the self-adaptive gas barrier layer, so that a sandwich structure is formed. The flexible packaging material not only can be flexibly stretched, but also has ultrahigh gas barrier property, and has important significance and value for promoting the practical application and industrialization process of flexible electronic devices.

The invention provides an anastomotic stoma reinforcing device as well as a preparation method and application thereof. The anastomotic stoma reinforcing device comprises a reinforcing material layer, a connecting material layer and a release film which are sequentially stacked, wherein the connecting material layer comprises a hydrophobic adhesive layer, a carrier layer and a waterproof adhesive layer which are sequentially stacked, and the hydrophobic adhesive layer is in contact with the reinforcing material layer. When the anastomotic stoma reinforcing device is used, the release film of the anastomotic stoma reinforcing device is peeled off, the reinforcing material layer can be fixed to the nail bin face and / or the nail anvil face of an anastomat by means of the waterproof glue layer, due to the fact that the reinforcing material layer has hygroscopicity and can be completely wetted after making contact with liquid on the tissue surface, the reinforcing material layer and the hydrophobic glue layer are separated, and therefore the anastomotic stoma is reinforced. However, the material of the anastomat does not absorb moisture, the connecting material layer is still firmly adhered to the anastomat and is not easy to separate, and when the anastomat is taken out, the connecting material layer is taken out along with the anastomat, so that the problems of slow postoperative recovery and the like caused by connecting material residues are avoided.

The invention discloses a lithium hydroxide granulation process of a carbon dioxide absorbent, and relates to the technical field of lithium hydroxide granulation, uniform particle size distribution is beneficial to dispersion and reaction uniformity in the subsequent processing process, the problem of inconsistent product performance caused by particle size difference is avoided, and the test of a universal material testing machine shows that the lithium hydroxide granulation process can be used for preparing lithium hydroxide granules. The average compressive strength of the prepared lithium hydroxide particles is 5N / particle, and the lithium hydroxide particles have better mechanical strength, are not easy to break in the storage, transportation and industrial processing processes, can effectively reduce the generation of dust, reduce the risk of environmental pollution, ensure the quality stability of the product and meet the basic requirements on the particle strength in actual production. After the product is placed in an environment with the humidity of 70% for 24 hours, the weight gain rate of the particles is increased by 50-70%, and compared with ungranulated powdery lithium hydroxide, the hygroscopicity is remarkably improved, which is benefited from the micropore loose structure of the particles and the protective effect of the binder, the storage stability of the product in a humid environment is effectively improved, and the absorption function of the product on carbon dioxide in air is increased.

The invention discloses a thermochemical energy storage composite material with a bionic ordered structure and a preparation method of the thermochemical energy storage composite material, and relates to the crossing field of new energy materials and thermochemical energy storage technologies. Through an optimization strategy of coordination of geometrical shape, internal channel and surface effect, efficient adsorption / desorption kinetics and solar energy direct drive heat storage are realized. The thermochemical energy storage composite material comprises a matrix with a bionic multi-scale mass transfer structure and hygroscopic inorganic salt uniformly loaded in the matrix, wherein the matrix is activated by KOH and then is loaded with the hygroscopic inorganic salt; the appearance of the base body imitates that of red blood cells, and the base body is in a single concave disc shape; and a vein-like layered directional vein network is arranged in the base body. The problems of moisture absorption and caking, slow mass transfer and low photothermal conversion efficiency of a traditional hydrated salt material are solved, and a new scheme is provided for efficient storage of renewable energy sources.

The invention discloses a preparation process of a composite rotating wheel for adsorption and dehumidification in a low-dew-point environment, which comprises the following steps: adding metal salt into a solution of a mixed organic ligand, adding an organic solvent, mixing with water, completely dissolving, carrying out solvothermal reaction, cooling to remove unreacted monomers and impurities, cleaning, and drying to obtain an MIL-101 (Cr) precursor adsorption material; the method comprises the following steps: dipping an adsorption material in different hygroscopic salt solutions to obtain a modified adsorption material; carrying out activating treatment; preparing the activated MIL-101 (Cr) adsorption material into slurry, coating the surface of glass fiber paper with the slurry, drying the glass fiber paper, and feeding the glass fiber paper into a rotating wheel; according to the present invention, the regular pore channel of MIL-101 (Cr) is adopted as the carrier so as to uniformly disperse the hygroscopic salt, such that the capture efficiency of the water molecules under the low humidity is enhanced, and the equilibrium adsorption capacity and the adsorption dynamic performance of the material under the low dew point environment are significantly improved;

The invention relates to the technical field of synthesis of organic silicon sulfonate, in particular to a preparation method of organic silicon sulfonate with both low-temperature toughening and flame retardance, which adopts a one-pot preparation technology, and solves the problems of stability, compatibility, hygroscopicity and the like of a traditional flame retardant by introducing sulfonate groups and utilizing a surface coating modification technology of a core-shell structure. Specifically, polysiloxane is adopted as an inner core carrier, silicon of a sulfydryl functional group is utilized, a sulfonate group is bonded through a sulfydryl alkene click chemical reaction, the sulfonate group is introduced into a side chain of the inner core carrier, sulfonate can effectively avoid the problem that small-molecule sulfonate is separated out in the inner core, and therefore the stability of the inner core carrier in the using process is guaranteed. Under the action of an initiator and a cross-linking agent, a sulfonate grafted organic silicon core is coated with a soft monomer and a hard monomer polymer, and a formed core-shell structure not only has a flame-retardant effect, but also has a low-temperature toughening effect.

The invention relates to the field of polymer composite materials, and discloses a bionic polymeric gel and a preparation method and application thereof, the gel comprises a hydrophobic continuous phase skeleton composed of siloxane, a styrene block copolymer and the like, and a hydrophilic network formed by in-situ polymerization of hydrophilic precursors such as super absorbent resin and the like and interpenetrating with the hydrophobic continuous phase skeleton. The preparation method adopts a continuous reaction extrusion process and comprises the following steps: firstly, melting and blending the main components, and then sequentially injecting the bifunctional interface anchoring agent, the skeleton protection type comonomer and the thermal initiator through a lateral charging port. According to the method, a chemical bond is constructed on a two-phase interface through an interface anchoring agent, and degradation of a hydrophobic skeleton is inhibited by using a skeleton protection type comonomer. The prepared gel is stable in structure, has excellent adhesion and high hygroscopicity, and can be used for preparing medical application, pressure-sensitive adhesive or transdermal absorption preparations.

The invention relates to the technical field of fabrics, and discloses an antibacterial fabric and a preparation method thereof.The preparation method comprises the steps that water, an organosilicon quaternary ammonium salt thymol finishing agent and a cotton / spandex blended fabric are added into a container, and then two-time dipping and two-time rolling, pre-drying and baking are conducted; the organic silicon quaternary ammonium salt thymol finishing agent contains phenolic hydroxyl groups, quaternary ammonium salt cations, ureido and other hydrophilic groups, so that the finished fabric shows good moisture regain and hydrophilic hygroscopicity, and the organic silicon quaternary ammonium salt thymol finishing agent contains a thymol natural antibacterial agent and organic silicon quaternary ammonium salt antibacterial groups, so that the antibacterial effect of the fabric is improved. The strong killing and inhibiting effects on bacteria and microorganisms are realized. The finishing agent is firmly attached to the surface of the fabric, so that the fabric is endowed with excellent antibacterial performance.

The invention relates to the field of textile fabrics, in particular to a multi-fiber all-in-one suede four-way stretch shark trouser warm-keeping suede fabric which comprises a weave 1 matched with weft plain stitch weave and made of nylon / polyester filament yarn core-spun elastic fiber spandex materials, a weave 2 adopting core-spun yarn of the weave 1 and matched with elastic spandex, and a weave 3 which is vertically connected double rib weave. Chemical fiber filaments and elastic fibers are adopted as connecting lines, and the weave 4 is a looped pile weave and is made of cellulose fibers with high hygroscopicity and excellent skin-friendly performance. Through the innovative combination of the weave 1 and the weave 4, the fabric has the multiple functions of fine appearance, four-side elastic property, bulge prevention, high elastic resilience, environmental protection, health, skin fitting, comfort, static resistance and the like, and meets the high requirements of underwear in autumn and winter for comprehensive performance.

The invention relates to the technical field of humidity control materials, in particular to a UV curing humidity control material and a preparation method thereof. The UV curing humidity control material comprises the following raw materials: UV resin, a reactive diluent, a photoinitiator and a humidity control additive, and the humidity control additive comprises one or more of hygroscopic salt, polysaccharide derivatives and polyhydric alcohols. The UV curing humidity control material provided by the invention adopts a substrate-free photocuring polyurethane system, on the basis of retaining an excellent humidity control effect, the UV curing humidity control material also adapts to the installation requirement of a narrow space in the camera, realizes rapid and convenient assembly, can be customized as required according to the specific size of the camera, and has good application flexibility; and meanwhile, the adhesive has the advantages of high curing speed and high production efficiency, and can still keep stable and excellent adhesive property after long-period aging, so that the long-term use reliability of the product is guaranteed.

The invention belongs to the field of hygroscopic materials, and discloses a copolymerization temperature-sensitive hygroscopic gel material and a preparation method and application thereof. The gel material is prepared by copolymerizing the following raw materials in percentage by mass: 0.5%-15% of a monomer A, 0.5%-15% of a monomer B, 5%-20% of hygroscopic salt and the balance of water, the monomer A is a temperature-sensitive monomer, and the monomer B is a hydrophilic monomer. By adjusting the mass ratio of the monomer to the salt, the critical conversion temperature and the moisture absorption and desorption performance of the material can be flexibly controlled. The material has the temperature-sensitive rapid dehydration characteristic of PNIPAM and the high swelling ratio characteristic of zwitter-ions, and low energy consumption, efficient moisture absorption and rapid water vapor release are achieved. The preparation method comprises the following steps: dissolving the components to prepare a precursor solution, introducing nitrogen to remove oxygen, initiating polymerization and forming at 20-60 DEG C; the obtained gel material shows excellent moisture absorption efficiency and cycling stability in the fields of water taking from air, heat management and heat storage, and has wide application value.

The invention relates to the technical field of coatings, and discloses a coating containing a modified molecular sieve and a preparation method and application thereof, and the coating comprises 100 parts by weight of a waterborne polyurethane emulsion, 1.5-35 parts by weight of the modified molecular sieve and the like. After the 4A molecular sieve is modified, the surface hydrophilicity becomes good, the moisture absorption performance of the molecular sieve is improved, the 4A molecular sieve is uniformly dispersed in the waterborne polyurethane emulsion and the paint film, more moisture absorption sites are achieved, and the moisture absorption rate of the paint film is improved. Nitrogen-containing heterocyclic rings and a large number of hydroxyl groups and sulfonate groups are introduced to the surface of the molecular sieve, strong coordination acting force is formed with the surfaces of substrates such as tinplate and aluminum plates, the bonding capacity of a paint film to the substrates is improved, and therefore the adhesive force between the paint and the substrates is improved.

The invention belongs to the field of functional polymer materials, and particularly relates to a temperature-sensitive core-shell moisture absorption microsphere based on a biomass source and a preparation method. The preparation method comprises the following steps: dissolving methyl cellulose in water to prepare a solution A; dissolving calcium lactate and LiCl in water according to a mass ratio of 1: (2-14) to prepare a solution B; uniformly mixing the two to obtain functionalized core liquid; and dropwise adding the core liquid into a sodium alginate coagulating bath to carry out ionic cross-linking reaction to form gel microspheres, and washing and freeze-drying to obtain the product. According to the invention, a stable structure with moisture absorption salt / temperature-sensitive methyl cellulose as a core and calcium alginate gel as a shell is constructed in one step through a reverse instillation molding technology. The structure can effectively prevent moisture absorption salt from leaking, efficient release of moisture can be achieved at the low temperature by means of the temperature-sensitive characteristic of methyl cellulose, and desorption energy consumption for taking water from air is remarkably reduced. The raw materials are green, the process is simple, and the prepared microspheres are good in moisture absorption performance, high in cycling stability and suitable for atmospheric moisture collection.

The present invention relates to the technical field of aerosol fire extinguishing agents. Specifically disclosed are a chemical coolant for an aerosol fire extinguishing agent, and a preparation method therefor and a use thereof. The coolant comprises the following components in percentage by weight: 80%-95% of an organic acid, 1%-10% of a lubricant, and 1%-10% of silicone oil. The preparation method specifically comprises: weighing the organic acid, the lubricant, and the silicon oil, uniformly mixing same in proportion, granulating by a screen, and pressing the obtained particles by means of a tablet press so as to obtain a chemical coolant tablet for an aerosol fire extinguishing agent. In the present invention, the organic acid is used as a main raw material, and the lubricant and a water repellent agent are added, so that it is convenient for preparation, molding and storage; during specific use, the surfaces of aerosol particles are coated with the organic acid, so that the hygroscopicity of the coolant and corrosion to metal are reduced.

The invention relates to the technical field of new energy power generation, in particular to a high-current moisture generator under low humidity and a preparation method thereof.The high-current moisture generator comprises a first electrode, an ionized water gel layer and a second electrode which are sequentially arranged, the ionized water gel layer has a salt concentration gradient, and the work functions of the first electrode and the second electrode are different; a first electrode is uniformly coated with an ionized water gel layer added with hygroscopic salt, and then the other side of the ionized water gel layer is covered with a second electrode, so that the moisture generator with a first electrode-ionized water gel-second electrode as a basic unit is formed. The moisture generator prepared by the invention is based on the synergistic effect of the primary battery effect and moisture power generation, so that the moisture generator has large short-circuit current at low humidity, the maximum short-circuit current can reach 5mA, and the moisture generator has relatively high power output density at low humidity and has a good self-power-generation function.

The invention discloses a film-forming composition and a preparation method thereof, a film-forming agent, application and cosmetics, and belongs to the technical field of cosmetic film-forming agents, the film-forming composition comprises the following components by mass: 7-30% of povidone, 10-24% of polyesteride-5, 0.1-2% of hydroxypropyl starch and the balance of water. The hydroxypropyl starch with the degree of substitution (DS) of 0.12-0.16 is matched with polyesteride-5 and povidone, so that the problems of high brittleness, easiness in tightening and high hygroscopicity when povidone is independently formed into a film are solved, and the mechanical property of the formed film is improved. The prepared film-forming agent keeps the characteristics of freshness and non-stickiness while providing strong makeup fixing power, reduces the skin tension, and meets various requirements of consumers on makeup fixing spray and liquid foundation.

The invention relates to the technical field of biology, and particularly discloses an Ab-Taq enzyme freeze-drying protective agent and a preparation method and application thereof.The freeze-drying protective agent is prepared from, by mass, 2%-10% (w / v) of trehalose, 1%-3% (w / v) of polyethylene glycol 20000, 5%-15% (w / v) of mannitol, 0.1%-1% (w / v) of poloxamer 188 and sterilized purified water serving as a solvent. The freeze-drying protective agent disclosed by the invention not only can play a role in protecting and forming the Ab-Taq in a freeze-drying process, but also is simple in added protective agent component, and does not influence the amplification reaction of the Ab-Taq. The freeze-dried product prepared by using the optimized freeze-drying process is smooth in appearance molding and low in hygroscopicity, has no obvious change in amplification performance before and after freeze-drying, supports normal-temperature storage and transportation, does not need cold chain protection, and can avoid adverse effects on reagent performance caused by repeated freezing and thawing of conventional reagents.

The invention belongs to the technical field of metallurgy, and particularly relates to a slag charge for electroslag remelting in a high-altitude and high-humidity environment and a preparation method thereof.The slag charge is prepared from 20-22% of calcium fluoride, 25-28% of aluminum oxide, 20-25% of calcium oxide, 8-10% of magnesium oxide, 8-10% of silicon dioxide, 3-8% of rare earth oxide and 1-5% of barium oxide; for high altitudes (barometric lt; 90 kPa) and high humidity (relative humidity gt; the invention provides the low-hygroscopicity, low-fluorine and environment-friendly slag charge, so that the stability of the slag pool is improved, the oxyhydrogen control is realized, and the energy consumption is reduced.

The invention relates to the technical field of drying agents, in particular to a porous composite gel drying agent and a preparation method thereof. Conventional desiccants are difficult to give consideration to both stable chemical properties and high moisture absorption capacity. In order to solve the problems, the porous composite gel drying agent is provided, lithium chloride, calcium chloride and other hygroscopic salts are introduced to serve as additives in a porous polymerization network of the drying agent and are compounded with the polymer network, and the intrinsic moisture absorption capacity of the material is remarkably improved. The moisture absorption capacity of the obtained porous composite gel drying agent is far higher than that of traditional silica gel, the long-acting moisture absorption requirement in the high-humidity environment can be met, and the porous composite gel drying agent is particularly suitable for the high-end fields of precision electronics, new energy batteries, biological agents and the like with strict requirements for humidity control precision.

The invention relates to the technical field of adsorption materials, and discloses a wide-humidity-range moisture absorption aluminum-based MOF material and a preparation method thereof.The preparation method of the wide-humidity-range moisture absorption aluminum-based MOF material comprises the steps that S1, ligand pretreatment is conducted; s2, preparing a metal source; s3, mixing the ligand solution and the metal salt solution, uniformly stirring, transferring into a reaction kettle, and naturally cooling to room temperature after the reaction is completed; s4, centrifuging or filtering and separating the product obtained in S3 to obtain a solid product, washing with deionized water and an organic solvent, and drying to obtain an aluminum-based MOF material; and S5, the aluminum-based MOF material obtained in the step S4 is subjected to surface modification treatment, and the moisture absorption aluminum-based MOF material with the wide humidity range can be obtained. The moisture absorption aluminum-based MOF material with the wide humidity range is an MOF material with the wide humidity range and efficient moisture absorption performance, and has good application prospects in the fields of air dehumidification, water resource collection, industrial gas purification and the like.

The invention relates to the technical field of pesticides, and discloses a glyphosate potassium salt crystal form and a preparation method thereof.The X-ray diffraction pattern of the glyphosate potassium salt crystal form comprises at least one characteristic peak in 2theta of 10.213 + / -0.2 degrees, 20.225 + / -0.2 degrees, 20.867 + / -0.2 degrees, 22.861 + / -0.2 degrees and 23.802 + / -0.2 degrees, the weed withering rate peak value of the glyphosate potassium salt 28 days after pesticide application reaches 98.48%, the weeding performance is excellent, and the glyphosate potassium salt can be applied to the field of pesticides. The crystal form has good stability, the mass change is below 0.5% after the crystal form is stored for 10 days under the conditions of humidity of 65% and room temperature, the crystal form has no obvious hygroscopicity and no obvious change, meanwhile, the crystal form has excellent performance in a long-term stability test, and the crystal form structure does not change after long-term storage.