87results about How to "Dense network structure" patented technology

The invention provides a quick-molding self-healing hydrogel and a preparation method thereof. The preparation method comprises the following steps: by taking polyvinyl alcohol as a raw material, firstly, reacting the polyvinyl alcohol with glycidyl methacrylate to synthesize methacrylated polyvinyl alcohol, and then, carrying out esterification reaction on carboxyl on succinic anhydride and hydroxyl on the methacrylated polyvinyl alcohol to prepare carboxylated methacrylated polyvinyl alcohol; preparing a precursor mixed solution, mixing the precursor mixed solution with an iron tartrate solution containing ferric ions, and carrying out ultraviolet polymerization molding to prepare the quick-molding self-healing hydrogel with a physicochemical double-crosslinked single-network structure.The hydrogel has the advantages of being high in forming speed and excellent in self-healing performance, and has excellent mechanical properties.

The invention discloses a nitride fluorescent powder and a preparation method thereof, a light-emitting device comprising the nitride fluorescent powder. The nitride fluorescent powder is a CaAlSiN3 structure, and comprises the following components in percentage by weight: 32-48% of alkali earth metal, 9-34% of Si, 10-25% of N, 0.1-0.8% of O, 13-26% of Al and 0.2-8% of Eu. The ratio of the sum of weight percents of Al and Si in any unit volume within the 0-50nm range from particle surface to the particle center to the weight percent of Si in any unit volume beyond the range is m, and 1.5<=m<=5. The nitride fluorescent powder disclosed by the invention has higher light-emitting efficiency.

The invention discloses fluorescent powder, a preparation method thereof and a light-emitting device comprising same. The fluorescent powder has an Sr2Si5N8 structure and comprises 32-45% of alkaline earth, 25-38% of Si, 22-27% of N, 0.05-0.5% of O, 0-0.5% of Al and 0.2-13% of Eu by weight percentage, the ratio of the total weight percentage of Al and Si in any unit volume within the range of 0-50 nm extending to the particle center from the particle surface in fluorescent powder particles to the weight percentage of Si in any unit volume outside the range is m, and the value range of m is not less than 1.2 and not more than 2.5. The fluorescent powder provided by the invention is higher in light-emitting efficiency.

The invention relates to an ultraviolet-cured acrylic resin water-based coating material, which is prepared from the following components in parts by weight: 50-60 parts of acrylic resin prepolymer, 1-3 parts of defoaming agent, 1-3 parts of emulsifier, 20-30 parts of filler, 2-4 parts of dispersing agent and 100 parts of water. According to the invention, an ultraviolet curing agent is directly grafted into a hyperbranched polymer structure, so that cross-linking and curing can be performed in molecules to form a three-dimensional network structure so as to achieve high curing efficiency; a curing reaction only starts cross-linking curing under ultraviolet irradiation, so that the performance of a finally cured film is easy to control, and the construction difficulty of the coating material is remarkably reduced; water is used for replacing an organic solvent, so that the method has the obvious advantages of environmental protection, no toxicity, high efficiency and cost reduction, and has remarkable economic and social benefits; and the water-based coating material prepared by the invention has the advantages of extremely strong adhesive force, high surface drying speed and highpaint film glossiness, and can be widely applied to coating of wood product surfaces.

The invention relates to a preparation method of a carboxymethyl cellulose based reversible photochromic hydrogel. The preparation method comprises the following steps: dissolving carboxymethyl cellulose of different substitution degrees into water to prepare a carboxymethyl cellulose aqueous solution, preparing a phospho-tungstic acid aqueous solution, mixing the phospho-tungstic acid solution and the carboxymethyl cellulose aqueous solution under the condition of continuous stirring, controlling addition manner and dosage of phospho-tungstic acid, and finally stopping stirring and standing for 2h so as to obtain the carboxymethyl cellulose based hydrogel.

The invention relates to a high-toughness high-conductivity carbon paper material for a proton exchange membrane battery, and belongs to the technical field of carbon paper materials. By utilizing a constant-temperature liquid-phase oxidation-reduction reaction between potassium permanganate and concentrated sulfuric acid, a nano manganese dioxide material is effectively loaded on the surface of the carbon paper material; meanwhile, polydimethylsiloxane is effectively coated on the surface of the polydimethylsiloxane, and the cross-linked polydimethylsiloxane is etched through hydrofluoric acid; the polydimethylsiloxane material is effectively etched, and holes are formed in the polydimethylsiloxane material, so that the conduction of the current material is ensured; meanwhile, the material structure is effectively coated and improved by the technical scheme; and a layer of ultrathin nano MnO<2> nano film is prepared on a carbon paper substrate by a chemical oxidation-reduction method,in this way, the specific surface area of the MnO<2> film electrode can be greatly increased, the capacity of double electric layers is increased, the electrochemical performance and power performance of the MnO<2> material are brought into full play, the utilization rate of the MnO<2> material is increased, meanwhile, the toughness and strength of the material are effectively modified through the coated and modified polydimethylsiloxane, and the mechanical property of the material is improved.

Compositions and methods of creating and applying coatings for strengthening glass substrates are made from precursors and additives that use an under-stoichiometric amount of water, for example, wherein a ratio of water in said additive to said precursor is equal or less than about 0.5 moles of water per mole alkoxy group in the precursor.

The invention provides an organic-inorganic hybrid material including: a support, and a graft polymer layer containing a graft polymer chain directly bonding to a surface of the support or a surface layer provided on the support, the graft polymer layer containing an inorganic component including a crosslinked structure formed through hydrolysis and polycondensation of an alkoxide of an element selected from Si, Ti, Zr and Al. The organic-inorganic hybrid material is useful as a gas barrier film.

The invention provides a preparation method of a gelatin filled silk protein gelatin gel fiber membrane. The preparation method comprises the following steps: under a nitrogen gas environment, takingacrylamide as a monomer and water as a solvent, and taking potassium persulfate and sodium sulfite as an oxidization reduction initiator; dividing the oxidization reduction initiator into three equalparts; adding the first part of the initiator into a water solution of the acrylamide; firstly, carrying out low-temperature polymerization reaction; adding the second part of the initiator and continually reacting; adding rabbit skin gelatin particle sponge and the third part of the initiator; reacting again; dropwise adding hydroquinone to obtain a polyacrylamide modified gelatin solution; dissolving a silk protein nano-fiber membrane into a formic acid solution; adding the rabbit skin gelatin particle sponge and uniformly mixing to obtain a spinning solution; carrying out electrostatic spinning to obtain the silk protein gelatin gel nanofiber membrane; immersing the silk protein gelatin gel nanofiber membrane into the polyacrylamide modified gelatin solution; dropwise adding glutaraldehyde and carrying out microwave oscillation treatment; taking out the fiber membrane and drying to obtain the gelatin filled silk protein gelatin gel fiber membrane.

The invention discloses a root-strengthening cattle hair keratin coated controlled-release fertilizer. The fertilizer is prepared from, by weight, 20-21 parts of cattle hair, 50-55 parts of cottonseed hulls, 40-45 parts of sugarcane leaves, 45-46 parts of pomace, 30-32 parts of shrimp shells, 30-32 parts of weathered coal, 25-30 parts of hawthorn seeds, 1-1.1 parts of paclobutrazol, 1-1.2 parts of calcium superphosphate, 1-1.2 parts of ammonium sulfate, 1.2-1.5 parts of polyacrylamide, 0.9-1 part of diethyl aminoethyl hexanoate, 40-45 parts of bentonite, 0.2-0.3 part of fatty acid methyl ester ethoxylate, 0.2-0.3 part of sodium carbonate, 20-21 parts of mercaptoethanol, 18-19 parts of urea, 3-4 parts of lauryl sodium sulfate, 0.2-0.3 part of transglutaminase, 3-4 parts of starch, 18-20 parts of a 10% polyvinyl alcohol solution, 7-8 parts of a 5% carboxymethylcellulose solution, 4-5 parts of formaldehyde, 5-6 parts of glycerine, 0.2-0.3 part of borax and 2-2.5 parts of microbial bacterium powder. The fertilizer can effectively improve the granular structure of soil, promote the growth of crop roots and strengthen the roots.

The invention discloses a soilless spray seeding substrate for mine greening and a preparation method thereof, and belongs to the technical field of plant cultivation. The soilless spray-seeding substrate for mine greening comprises a spray-seeding base material, an adhesive solution and a water-retaining agent solution. The spray-seeding basic material is prepared from 40 to 120 parts of vermiculite powder, 60 to 160 parts of perlite, 100 to 200 parts of northeast black charcoal soil and 600 to 1000 parts of plant fibers; the adhesive solution is prepared from 5 to 50 parts of urea, 1000 to 10000 parts of water, 100 to 400 parts of cottonseed meal and 5 to 50 parts of citric acid; the water-retaining agent solution is prepared from 30 to 200 parts of sodium alginate, 1500 to 10000 parts of water and 10 to 50 parts of multivalent metal ions. The plant culture medium disclosed by the invention has the advantages of good adhesive force, rain wash resistance, good water retention capacity and transpiration resistance, soft base material, difficulty in hardening and good air permeability.

The invention belongs to the field of luminescent materials, particularly relates to a method for improving the luminescence intensity of a room temperature phosphorescent material and provides a highluminescence intensity supramolecular room temperature phosphorescent material and a preparation method thereof. Through direct or indirect oxidation treatment on a hybrid supramolecular gel phosphorescent material formed from tetracarbonyl phenyl metal porphyrin (M-TCPP), a cationic surfactant and N, N'-dibenzoyl-L-cysteine (DBC) so that the disulfide bond of the gel factor in the phosphorescentmaterial is oxidized into a sulfonic acid group and the room temperature phosphorescent material with high luminescence intensity is obtained. Compared with the material without direct or indirect oxidation, the room temperature phosphorescent material improves luminescence intensity by close to 100 times and keeps the stability of the luminescence intensity at pH of 2-12.

The invention discloses probiotic gel particles and a preparation method thereof. The probiotic gel particles are prepared from the raw materials: 0.5 to 2.5 wt% of Carrageenan, 0.1 to 2 wt% of amorphophallus konjac, 2.1 to 7 wt% of edible oil and fat, 0.5-5 wt% of liquid strain culture medium, and 0.2 to 0.8 wt% of probiotic. The viable bacteria of the probiotic is high in survival rate, and the mouth feel of the probiotic gel particles provided by the invention is more smooth and clean.