202results about How to "Modification process is simple" patented technology

The invention discloses a method for preparing nano silver and titanium dioxide thin films on the surfaces of hollow glass beads, which comprises the following steps of: I, firstly coating a nano silver thin film on the surface of a hollow glass bead by using a chemical plating method; and II, then directly coating a layer of nano titanium dioxide thin film on the surface of the hollow glass bead coated with the nano silver thin film by using a hydrothermal method. The method disclosed by the invention has the advantages of raw material saving, simplicity and convenience in operation, good binding strength, higher photocatalytic activity and the like, and endows hollow glass beads with a photocatalytic degradation property for dyes and organic pollutants.

The invention provides a method for preparing composite hydrogel through modifying bamboo shoot leftovers and an application of the composite hydrogel. An adsorption material is prepared by the steps of extracting cellulose from the bamboo shoot leftovers, then modifying by sodium chloroacetate, carrying out epoxy chloropropane cross-linking, followed by carrying out inverse suspension polymerization, and finally carrying out freeze drying. The prepared hydrogel beads are used as a bio-adsorbent, methylene blue is used as a dye model molecule, an adsorption effect on methylene blue is studied, and a theoretical foundation is laid for adsorption and sustained release of the hydrogel. The novel composite hydrogel prepared by utilizing the bamboo shoot processing waste leftovers is rich in raw material sources and low in cost, can achieve waste utilization, and promotes recycling economy; and the prepared hydrogel can be applied to adsorption of dye wastewater and adsorption and sustained release of a model drug, reduces pollution of bamboo shoot leftover arbitrarily discarding on the environment, and can play a certain role in promoting green development of ecological resources.

The invention discloses a lithium-enriched manganese-based anode material with a fast ion conductor coating layer and a surface heterostructure and a preparation method of the lithium-enriched manganese-based anode material. The surface of the lithium-enriched manganese-based anode material is coated with a coating layer consisting of Li3PO4 and Li4P2O7; a spinel phase nano-crystal is inlaid in the surface of the lithium-enriched manganese-based anode material; the spinel phase nano-crystal and a lithium-enriched layered material form a heterostructure; the lithium-enriched manganese-based anode material has a structural formula of Li1+aMnbMcO2, wherein M is one or more of Ni, Co, Al, Cr, Fe and Mg, 0<=a<=1, 0<=b<=1, and 0<=c<=1. The method comprises the following steps: (1) fully mixing the lithium-enriched manganese-based anode material with a proper amount of phosphate; and (2) sintering the sample which is uniformly mixed in a certain atmosphere, thus obtaining the lithium-enriched manganese-based anode material with the fast ion conductor coating layer and the surface heterostructure. The first coulombic efficiency of the lithium-enriched anode material is improved, the cycling stability and rate performance of the lithium-enriched anode material are improved, and the requirements of a power battery can be met.

The invention discloses a stereo liquid crystal displayer structure and a method for manufacturing the same, wherein, when the liquid crystal displayer is made, a raster layer is integrated between an upper plaroid and an upper glass plate of the displayer, forming a stereo liquid crystal displayer which has the advantages of high precision and accurate para position and is based on the parallax barrier technique. The invention can be widely applied to a plurality of liquid crystal displayers with different screen sizes; moreover, the invention has the advantages of easy technological transformation, low manufacturing cost and preferable stereo displaying effect.

The invention belongs to the field of waste residue utilization and specifically relates to a modified phosphogypsum as well as a preparation method and a use of the modified phosphogypsum, solving the technical problem that a novel modified phosphogypsum is provided, which is prepared by taking phosphogypsum, papermaking white clay and kiln dust as raw materials so that industrial waste residues are utilized thoroughly to overcome the defect that the previous modifiers need other natural minerals and chemical raw materials to further achieve the purpose that wastes are treated by using wastes. The modified phosphogypsum is prepared from the following raw materials in parts by weight based on dry matters: 0.2-0.9 part of phosphogypsum, 0.9-8.1 parts of papermaking white clay, and kiln dust accounting for 0.5%-3% of the total weight of the modified phosphogypsum. The preparation method of the modified phosphogypsum comprises the treatment steps of washing, flotation, alkaline neutralization modification and the like; meanwhile, the modification process is basically performed in slurry, and therefore, the phosphogypsum is modified thoroughly, and stable and reliable in quality. The obtained modified phosphogypsum can be used as a cement retarder.

The invention relates to a preparation method of halamine-containing antibacterial polyacrylonitrile fiber, belonging to the technical field of modification of fiber fabric. The preparation process comprises the steps of: firstly, using alkaline water solution to soak the polyacrylonitrile fiber, and causing the fiber to have hydrolysis reaction and the like; generating acylamino, carboxyl, imido groups and the like on the surface of the fiber; and using hypohalite to rinse the fiber, generating halamine on the surface of the fabric so as to endow the fiber with antibiosis. The prepared polyacrylonitrile fiber has a broad spectrum antibacterial function; and after being sterilized, the fiber is rinsed by the hypohalite water solution again in a halogenated way, so that the antibacterial function of the fabric can be regenerated.

The invention discloses a silane coupling agent containing a vinyl ether chain segment, and a preparation method and an application thereof. The silane coupling agent is a novel silane coupling agent. The silane coupling agent is acquired through the catalytic reaction of the traditional coupling agent with a formula (IV) structure and fatty alcohol-polyoxyethylene ether or alicyclic alcohol polyoxyethylene ether. The application of the silane coupling agent disclosed by the invention in preparing a high-performance tread rubber by in situ modifying white carbon black can effectively reduce the VOC discharge in the size mixing process and in the use process of rubber products. The silane coupling agent disclosed by the invention also can be used for modifying the liquid phase of the white carbon black; the wet-process mixing can be realized; the problems of single method for modifying the white carbon black with the traditional silane coupling agent, large energy consumption in the processing process and serious pollution can be effectively solved; and the traditional coupling agent with the formula (IV) structure and the fatty alcohol-polyoxyethylene ether in low cost are taken as the synthesis raw materials, so that the use cost of the coupling agent is lowered.

The invention provides a method for preparing a high-strength high-density isotropic graphite material. According to the method, pitch mesocarbon micro bead (MCMB) powder of which the D50 is larger than 20 micrometers, and the volatile content is less than 7 percent is taken as a raw material, and the high-strength high-density isotropic graphite material is prepared by adopting the self-sintering process that the raw material powder is added into an organic solvent of pitch, the solvent is removed, the powder is pressed, a green briquette is formed through isostatic compaction, roasting and carbonization are performed, and graphitization is performed. According to the method, an organic solvent method is utilized to disperse bitumastic cement, so as to realize the modification on MCMB powder with large size and low volatile matter, the original shapes and sizes of the MCMB particles are basically kept after modification, good self sinterability is realized, and the finally obtained graphite is fine and uniform in structure, high in density and excellent in mechanical property. The pitch of the dispersed and modified MCMB is distributed uniformly, the inner stress of the green briquette in the isostatic compaction step is more uniformly distributed, and balanced expansion and shrinkage in the working procedures of roasting and graphitization are realized, and therefore, a product is not liable to crack, and the yield reaches not less than 90 percent.

The invention relates to an ardealite-based self-leveling material. he ardealite-based self-leveling material consists of the following materials in parts by weight: 40-80 parts of modified ardealite, 6-15 parts of semi-hydrated gypsum, 20-30 parts of admixture, 1-4 parts of re-dispersible latex powder, 0.10-0.30 part of a retarder, 0.20-1.0 part of a water reducer, 0.10-0.25 part of a water-retaining agent, 0.06-0.15 part of an antifoaming agent and 0.10-0.40 part of an air entraining agent. The ardealite-based self-leveling material has the beneficial effects that firstly, the waste utilization rate is high; secondly, the modifying process of the ardealite is high and the energy consumption is low; and thirdly, the performances of the self-leveling gypsum are improved by virtue of a reasonable proportion of various wastes, for example, CSH (Calcium Silicate Hydrate) phase can be generated by ardealite, carbide slag and coal ashes, so that the water resistance is effectively improved. Therefore, the ardealite-based self-leveling material had dual characteristics of circulation economy and low-carbon economy, and can be extensively applied to an industrial building and a civil building.

The invention relates preparation of castor oil-based coating material and application of the castor oil-based coating material in controlled-release fertilizers. Epoxidized castor oil is prepared from castor oil as a raw material by using a non-solvent method under acid catalysis by using small-molecular carboxylic acid and hydrogen peroxide as modifiers; then, small-molecular alcohols and alcohol amines are used as ring-opening reagents to prepare the modified castor oil coating material 200-400 mgKOH/g in hydroxyl value under the action of a solid acid catalyst. The modified castor oil coating material and isocyanate are used as component A and component B respectively to prepare a modified castor oil coated controlled-release fertilizer by using non-solvent in-situ reaction coating technology. The controlled-release fertilizer is green, the production process of the fertilizer is simple, the controlled release effect is good and stable, and controlled-release fertilizers with different release periods may be prepared by changing coating amount.

A nanoparticles modified epoxy adhesive for ceramics, metals and high-molecular materials is proportionally prepared from the dual-component epoxy adhesive and nanoparticles through mechanical mixing or solution mixing.

The invention discloses a method for improving a property of a magnesium oxychloride cementing material by composite modification. The method comprises the following steps: 1) magnesium chloride and water are mixed at a room temperature and stirred until magnesium chloride is completely dissolved; 2) a modifier organic silicon is added to a solution in Step 1) and sufficient stirring is performed for 10-15min to obtain organic silicon mixed brine; 3) a modifier starch is added to lightly-burned magnesium oxide and stirring is performed for 3-5min to obtain mixed powder; 4) the mixed brine is added to the mixed powder and stirring is performed for 5-10min to obtain the property improved magnesium oxychloride cementing material. The method is simple in technology and low in cost, is applied to a building material product, can significantly improve the water resistance of the product, improves the strength, inhibits moisture absorption and efflorescence, and prolongs the service life.

The application relates to a lithium battery cathode material. The lithium battery cathode material is spinel lithium nickel manganese oxide; the surface of spinel lithium nickel manganese oxide is coated with a coating; the coating comprises LiaBbOc and LiMnBO3; the structural formula of the spinel lithium nickel manganese oxide is LiM(x+y)Ni(0.5-x)Mn(1.5-y)O4, wherein the M is selected from at least one of Co, Al, Cr, Fe, Mg, Zr or Ti, the x is not less than 0 and is less than 0.2, and the y is not less than 0 and is less than 0.2; the LiaBbOc is specifically at least one of LiBO2, LiB3O5,LiB5O8, LiB7O11, Li2B4O7, Li3BO3, Li3B5O9, Li3B7O12, Li4B2O5 or Li4B6O11. The spinel lithium nickel manganese oxide and compounds of boron are mixed and sintered, so that the circling stability of the spinel lithium nickel manganese oxide is improved and the dissolution of manganese of the spinel lithium nickel manganese oxide in an electrolytic solution is restrained. An improved process is suitable for all spinel lithium nickel manganese oxide cathode materials and is simple and feasible, the preparation costs are low, the reproducibility is great, and the process is convenient for large-scale industrial production.

The invention discloses a preparation method and application of modified natural bamboo fiber materials. The preparation method comprises the steps as follows: enabling natural bamboo fibers to perform an oxidizing reaction by adopting a strong oxidant, and obtaining dialdehyde natural bamboo fibers; using the dialdehyde natural bamboo fibers for reacting with ethylenediamine, and obtaining the grafted natural bamboo fibers, that is, the modified natural bamboo fiber materials. The obtained grafted natural bamboo fibers are used for adsorbing formaldehyde to investigate the adsorption effect. The method disclosed by the invention modifies the natural bamboo fibers with an oxidation method and an amination method, the process is simple, raw materials are cheap, and the modified natural bamboo fibers have a relatively good adsorption effect on formaldehyde.

The invention discloses a preparation method of enhanced polyvinylidene fluoride lithium battery conductive adhesive. The method comprises the following steps of adding a mixture of polyvinylidene fluoride, N-methyl pyrrolidinone and a silane coupling agent into a round-bottom flask according to the raw material mass part ratio being 5: (40-50): (1-4); magnetically stirring for 1-3 h, uniformly mixing to obtain the enhanced PVDF adhesive. The manufactured enhanced PVDF adhesive is mixed with the positive active material and the conductive carbon and then added into a ball-milling tank to manufacture uniform slurry; the manufactured uniform slurry is coated on an aluminum foil current collector to improve the bonding intensity of the polyvinylidene fluoride adhesive. The preparation methoddisclosed by the invention is simple in process and easy to operate, and the modified effect is obvious. The modified adhesive prepared by the invention can be applied to the preparation of the lithium ion battery positive plate.

The invention discloses a nanometer titanium dioxide cotton fiber modifying method with improved dyeing property and attachment firmness. The nanometer titanium dioxide cotton fiber modifying method comprises the following specific steps of: firstly, carrying out pretreatment on cotton fibers; secondly, configuring a modifying solution and carrying out modifying treatment on the cotton fibers by adopting a hydro-thermal method; and thirdly, carrying out post treatment on the modified cotton fibers. According to the nanometer titanium dioxide cotton fiber modifying method disclosed by the invention, the problems of poor dyeing properties of the nanometer titanium dioxide coated cotton fibers and low attachment firmness of nanometer titanium dioxide and cotton fibers are solved and the cotton fibers are endowed with the performances of ultraviolet resistance and bacteria resistance.

The invention discloses a modified perovskite type catalyst, which is an ABO3 structure, wherein A is La1-xMx, x is 0 or 0.5, M is one selected from Sr, Ce, Ba and Ca, and B is one or two selected from Mn, Co, Cr, Fe and Ni. The preparation method comprises: 1, mixing the metal salt of A and the metal salt of M according to a molar ratio of A to B of 1:0.8-1:1.2, loading the obtained mixture ontoa carrier according to a sol-gel method, drying, and calcining to prepare an ABO3 perovskite type material; 2, immersing the perovskite catalytic material prepared in the step 1 in an acidic solution;and 3, washing the material obtained in the step 2 with distilled water or deionized water, placing in an oven after the pH value is neutral, and drying to obtain the modified perovskite catalyst. According to the present invention, the prepared modified perovskite type catalyst has the significantly increased catalytic activity compared with the original perovskite type catalyst, and retains theexcellent high-temperature resistance of the perovskite material.

The invention discloses a porous oil absorption material and a preparation and regeneration method thereof. The porous oil absorption material is a porous ceramic material uniform in pore distribution and with the pore diameter distribution range of 0.1-100 micrometers and above 40% of porosity, the porous oil absorption material is prepared from Al2O3 and SiO2, surface activation treatment is conducted on the porous oil absorption material so as to improve the surface hydrophilicity of the material, and the porous oil absorption material is soaked with modified liquid to obtain super-strong oil absorption capacity. The porous oil absorption material having an oil contamination removing function has the advantages of being simple in modification process, low in modification cost, high in oil absorption speed, large in oil absorption amount, high in water body purification degree and convenient to regenerate and the like.

The invention discloses a CO2-stripping process for urea with efficient condensation and low installation height and a high pressure tube condensation reactor. Problems of a traditional urea process are solved, including high civil construction framework, high device investment and hard operation, management and maintenance. With the specific high pressure tube condenser adopted, gas and liquid are separated, unreacted gas in the high pressure tube condensation reactor is directly sent to a scrubber, and simultaneously reacted liquid is sent to a synthesizing tower by a high pressure ejector. Compared with the traditional urea civil construction framework, the height of the framework of the process is lowered by 20-25m. The process has the advantages of simple modification, energy-saving property, lowered energy consumption, lowered investment, convenient operation and convenient maintenance and overhauling.