37 results about "Potassium tetratitanate" patented technology

The invention relates to a method for preparing photocatalytic foamed ceramics. The method comprises the following steps: (1) treating potassium tetratitanate raw powder; (2) modifying stearic acid; (3) pre-treating polyurethane foam; (4) preparing primary slurry; (5) carrying out slurry coating for the first time; (6) preparing secondary slurry; (7) carrying out slurry coating for the second time; and (8) carrying out sintering, and cooling to obtain the photocatalytic foamed ceramics. Compared with the prior art, the method has the advantages that the solid content of potassium tetratitanate slurry can be 75 percent by means of ball milling, rinsing, modifying of stearic acid and adding of a dispersing agent; a photocatalyst is immobilized due to the foamed ceramics prepared by direct slurry coating on the polyurethane foam, the contact area between particles and organic matters is enlarged due to the three-dimensional reticular structure of the foamed ceramics, and the photocatlysis performance is improved; slurry coating is directly performed on the foamed ceramics, so that the preparation method is simple, does not need secondary sintering, and is short in cycle and low in cost; and phase change happening at high temperature of potassium tetratitanate is solved by using low-temperature glass as an adhesive.

The invention relates to the technical field of high polymer materials, in particular to plastic for a hydrogen storage pressure vessel and a preparation method thereof. The plastic is prepared from PVC resin, HDPE resin, ethylene copolymer and modified potassium tetratitanate whiskers. The plastic can be used as an isolation layer in the liner of the hydrogen storage pressure vessel, and the ethylene-vinyl acetate copolymer and the modified potassium tetratitanate whisker are added, so that the physical properties such as tensile strength and elongation at break can be further improved, the sealing property of the whole liner of the vessel can be enhanced, the leakage amount of hydrogen is further reduced, and thus the hydrogen storage requirement is met.

The invention discloses a high-modulus environment-friendly glass fiber and a processing technology thereof, and belongs to the field of inorganic nonmetallic materials. The method comprises the following steps: firstly, treating glass fibers by using a silane coupling agent and bovine serum albumin to prepare high-surface-activity glass fibers, then carrying out modification by using halohydrocarbon modified lignosulphonate, adding n-dodecylamine solution modified aminated potassium tetratitanate to prepare a treating agent adsorbed on the surface of the high-surface-active glass fiber, mixing the treating agent with the high-surface-active glass fiber, then carrying out filtering and drying to obtain a blank, and finally carrying out high-temperature carbonization on the blank at a certain temperature to prepare the high-modulus environment-friendly glass fiber. The high-modulus environment-friendly glass fiber prepared by the invention has relatively high tensile modulus and excellent alkali resistance.

The invention discloses a surface imprinted Fe 3+ Potassium tetratitanate whisker adsorbent and preparation method thereof, the synthesis process steps include: ① loading nano TiO on the surface of protonated potassium tetratitanate whisker 2 Obtain whisker composite material; ② Fe 3+ Mix with chitosan and the obtained whisker composite material, add a crosslinking agent and light to make the reaction system crosslink and polymerize in a dispersed state and imprint and precipitate; ③ remove Fe 3+ template. By using surface molecular imprinting technology, the Fe 3+ Imprinted on the potassium tetratitanate whisker, to achieve the purpose of modifying the surface of the potassium tetratitanate whisker, to obtain a 3+ The adsorbent with selective adsorption capacity, the preparation method is environmentally friendly, the product has strong dispersibility, and the ion selectivity is high.

The invention relates to a method for preparing sodium metatitantate-potassium tetratitanate composite catalytic material by a molten salt method through using mixed nitrate as a cosolvent, and belongs to the technical field of material preparation. Tetrabutyl titanate is used as raw materials; a TiO2 material precursor is prepared by a hydrothermal method; then, the mixed nitrate is used as the cosolvent; the sodium metatitantate-potassium tetratitanate composite catalytic material is prepared by a nitrate molten salt method. The method has the advantages that the preparation conditions are simple, convenient and controllable; the equipment and the process are simple; the yield is great; the cost is low, and the like. The obtained product is a nanobelt with the length being 6 to 13 microns and the width being about 200 nm; wide application prospects are realized in the aspects of photocatalysis degradation of contaminant, photocatalysis hydrogen production and the like.

The invention relates to a method for preparing photocatalyst ceramic by means of potassium tetratitanate whiskers. The method comprises the following steps that 1, the potassium tetratitanate whiskers serve as main raw materials, and after ball milling is performed on the potassium tetratitanate whiskers in a ball mill, surface modification treatment is performed on the potassium tetratitanate whiskers with a silane coupling agent; 2, ceramic slurry is prepared by using the modified potassium tetratitanate whiskers and deionized water, a binder, low temperature glass powder, is added, a pH value is regulated with a NaOH solution, and high-speed stirring is performed in a magnetic stirrer; 3, short-chain amphiphilic molecules are added, and low-speed stirring is performed; 4, high-speed stirring is performed to foam, when big bubbles start to disappear, the high gear is switched to the low gear, and stirring is performed to obtain uniform and fine foam; 5, injection molding forming is performed, moldings are placed in a drying oven to be dried and then taken out after being cooled to the room temperature, and then the moldings are placed in a high-temperature furnace to be fired into porous ceramic according to the set sintering schedule. Due to the fact that catalytic degradation is performed on toxic organic pollutants by means of cheap and clean sunlight, the method for preparing the photocatalyst ceramic by means of the potassium tetratitanate whiskers has the advantages of being efficient, little in secondary pollution, friendly to environment, low in energy cost and the like.

The invention discloses a method for preparing ultrathin layered potassium tetratitanate crystal whiskers with uniform sizes, good crystal forms and attractive appearances by adopting a stearic acid method. The crystal whiskers are 0.8-1.2 mum in diameter; length-diameter ratio exceeds 20; and main raw materials include stearic acid, potassium nitrate and tetraethyl titanate. The method comprises the following steps of: melting reactants into stearic acid by taking stearic acid with low melting point (80 DEG C) and poor dispersibility as a reaction medium; and burning for removing most organic matters; performing a synthetic method for calcining at a high temperature, wherein the stearic acid is taken as a dispersing agent for mixing reactant raw materials on the molecular level in a synthesizing process, and is also taken as a reactant for being subjected to a coordination reaction with K<+> and Ti<4+> in the reactant raw materials. The method has the characteristics of simple operation process, low calcining temperature (800-950 DEG C), short reacting time (2-5 hours), high purity, high crystalizing degree, low product aggregation and the like, and is suitable for large-scale industrial production.

The present invention is one new synthesis process of potassium titanate whisker. TiO2 and K2O in the molar ratio of 2.5-3.5 and boron compound in the amount of 1-5 wt% of TiO2 are mixed and the mixture is heated inside one alkali-resisting container first to 800 deg.c and then to 900-1200 deg.c at the raising rate of 1 deg.c / min, maintained for 1-4 hr and cooled slowly to 800 deg.c to obtain potassium tetratitanate whisker bundle. The potassium tetratitanate whisker bundle is stirred mechanically in hot water at 80-100 deg.c for 1-4 hr and neutralized in 5-15 % concentration dilute sulfuric acid solution to obtain amorphous hydrate of potassium hexatitanate whisker. Through further staying at 800-1200 deg.c for 2-6 hr to complete crystal conversion, washing in hot water (80-100 deg.C) to eliminate soluble potassium compound and drying at 200 deg.c over, potassium hexatitanate whisker product with average length of 10-50 micron and average diameter less than 0.5 micron is produced.

The invention relates to a preparation method of photocatalytic foam ceramics, which comprises the following steps: (1) treatment of potassium tetratitanate raw powder; (2) modification of stearic acid; (3) pretreatment of polyurethane foam; (4) ) preparation of primary slurry; (5) primary slurry; (6) preparation of secondary slurry; (7) secondary slurry; (8) sintering and cooling to obtain photocatalytic foamed ceramics. Compared with the prior art, the present invention has the following advantages: through ball milling, water washing, stearic acid modification, and adding dispersant, the solid content of potassium tetratitanate slurry can reach 75%; The prepared foam ceramic realizes the immobilization of the photocatalyst, and its three-dimensional network structure increases the contact area between the particles and the organic matter, and improves the photocatalytic performance; and directly hangs the slurry on the foam ceramic, the preparation method is simple, and no secondary sintering is required. , the cycle is short and the cost is low; at the same time, the low temperature glass is used as the binder to solve the phase transition of potassium tetratitanate at high temperature.

The invention relates to a cement containing a large proportion of slag and a preparation method thereof. The cement is composed of the following raw materials in parts by weight: 90-100 parts of Portland cement, 10-15 parts of gypsum, 10-20 parts of fly ash, 70-90 parts of slag, 15-20 parts of magnesium sulfate whiskers, titanium 22-36 parts of potassium acid whiskers, 10-16 parts of aluminum sulfate, and 7.2-12.2 parts of grinding aid. The invention effectively improves the compressive strength and flexural strength of the Portland cement by adding potassium titanate whiskers into the cement, which is superior to the ordinary Portland cement on the market. In the invention, by adding a mixture of potassium tetratitanate whiskers and potassium octatitanate whiskers, the whiskers are better adsorbed on the surface of the slag, thereby reducing the corrosion of the slag powder by the alkaline environment, and at the same time, it can further improve the overall cement. The corrosion resistance of sulfuric acid and the resistance to salt freezing corrosion can shorten the final setting time, which is conducive to the solidification and hardening of cement.

In a titanium oxide compound according to the present invention, the titanium oxide compound is obtained by eluating potassium of potassium tetratitanate expressed by a general formula K2Ti4O9 and performing thermal processing, and, in an X-ray diffraction spectrum of the potassium tetratitanate obtained by using a Cu—Kα ray source, between a peak intensity Ia of a (200) plane, a peak intensity Ic of a (004) plane and a peak intensity Ib of a (31-3) plane, a relationship of Ia>Ib>Ic is satisfied.

The invention is a method for preparing nanofiber, and in particular comprises: by using butyl titanate, KNO3, citric acid, ethanol and nitric acid as raw materials, wherein by molar ratio, butyl titanate: KNO3: Citric acid: ethanol: dilute nitric acid = 1:2:2: (38 ~ 50): (19 ~ 25), polyvinyl alcohol or polyvinyl pyrrolidone as a polymer template, and aqueous solution of polyvinyl alcohol as a solvent, preparing a sol solution at room temperature; then preparing composite fiber by using an electrostatic spinning method, wherein an electrostatic spinning voltage is controlled to be 10 ~ 30KV, and curing distance of the nozzle to the accept screen is 8 ~ 20cm; and then performing heat treatment to the composite fiber at 500 ~ 950 DEG C for 3 ~ 8h to obtain layered K2Ti4O9 continuous nanofiber. The method of the invention is simple in process, easy in operation, high in efficiency, low in energy consumption, and simple in production equipment; and the prepared fiber has high purity, good crystallinity, a large surface area, a large length-diameter ratio and good dispersion.