89results about How to "Inhibition of growth rate" patented technology

The invention provides a polylactic acid nanometer bubble hole foaming material and a preparation method thereof. The method includes the steps that polylactic acid and biodegradable polyester are subjected to vacuum drying, then polylactic acid, biodegradable polyester and a foaming processing agent are subjected to melt blending through an internal mixer, then a blended material is subjected tohot pressing to be prepared into a flaky standby foaming sample; the standby foaming sample is put into a high-pressure kettle, a physical foaming agent is added for kettle pressure foaming, the kettle is kept for 1-10 hours at equal temperature and equal pressure, then rapid depressurizing is conducted in the kettle until normal pressure is reached, and therefore the polylactic acid nanometer bubble hole foaming material is prepared. Foaming temperature is controlled and set within the section of cold crystallization of polylactic acid, foaming is conducted, the foaming temperature is much lower than that of regular polylactic acid foams, during foaming, most polylactic acid is still in a rubber state, when air bubbles are increased, the increase speed of bubble holes can be effectively restrained, and therefore the foaming material has a large bubble hole size and a high bubble hole density.

The present invention relates to the technical field of aquatic feeds and particularly relates to powdery compound feed for a young Chinese softshell turtle stage and a production and processing device. The powdery compound feed comprises a box body, wherein the box body is provided with a cover plate, the cover plate is provided with a crushing structure and a stirring structure, the stirring structure comprises a driving motor, a first bevel gear, a first rotating rod, a stirring plate and second bevel gears. the box body is evenly and fixedly connected with shaking structures used for shaking filter plates in the circumferential direction below the filter plates, the box body is provided with a circulating structure, and a quantitative discharging structure used for quantitative discharging is arranged at the bottom of the box body. Crushing, stirring, circulating structures and screening are driven by a set of driving motors, so that use of electrical equipment is reduced, and theuse cost is reduced.

The invention provides a preparation method and application of an SSZ-13 molecular sieve. The preparation method comprises the following steps: (1) dissolving sodium hydroxide, an aluminum source, a silicon source and a template in water so as to obtain a mixture 1, wherein in the mixture 1, the molar ratio of water, an alkali source, the aluminum source, the silicon source and the template is (30-50):(0.1-0.3):(0.02-0.01):1:(0.1-0.3), and the template is organic amine; (2) adding polyacrylamide to the mixture 1 so as to obtain a mixture 2; (3) performing a crystallization reaction on the mixture 2 so as to obtain an initial product; (4) performing acquisition of SSZ-13 molecular sieve raw powder; and (5) performing baking for a certain period of time so as to obtain the SSZ-13 molecular sieve. The preparation method has the advantages that polyacrylamide is introduced, the growth rate of SSZ-13 molecular sieve grains is inhibited, and the small-grain SSZ-13 molecular sieve has higherselectivity to low-carbon olefin, a lower carbon deposition rate and a longer single-pass reaction life.

The invention provides a method for reducing leakage current of a formed foil, and particularly relates to a solution for hydration treatment of the formed foil and a hydration treatment method. The solution is an aqueous solution containing a component A, a component B and a component C. The component A is a substance containing SO4<2->, the component B is weak acid, and the component C is weak acid salt. According to the formed foil obtained by performing hydration treatment in the aqueous solution, the generated hydrated alumina layer is more compact, the problem of hole blockage caused bythe thickness of an alumina film in the ultrahigh-voltage formation process is solved, the leakage current is reduced, the specific volume is improved, and the service life of the aluminum electrolytic capacitor is prolonged.

The invention provides a method for improving weather resistance of decorative base paper titanium dioxide, and belongs to the technical field of decorative base paper titanium dioxide. The control is performed through salt treatment and calcination. The method comprises the following steps of A, using bleached slurry as raw materials; adding titanium dioxide sol into the raw materials; controlling the addition to meet the requirement that the proportion of TiO2 in the titanium dioxide sol to TiO2 in metatitanic acid is 2 to 6 percent; performing water washing; diluting the slurry subjected to water washing into 300 to 400g / L TiO2 slurry; B, adding potassium and phosphorus solution with the K2O / P2O5 ratio being 1.3 to 4.0 into the diluted slurry; performing stirring; adding aluminum-containing compound solution according to the Al2O3 to TiO2 proportion being 0.3 to 0.9 percent; performing stirring; C, performing pressurized filtering on the slurry material treated by the step B until the filter cake solid content is 45 to 55 percent; C, roasting the filter cake in the step C for 8 to 10h at the roasting temperature of 200 to 950 DEG C. Through the control on the salt treatment and roasting processes, the primary product weather resistance of the decorative base paper titanium dioxide is improved; the weather resistance of the decorative base paper titanium dioxide is further improved.

The invention relates to a high-yield planting method for onions, belongs to the technical field of vegetable planting, and particularly relates to a high-yield planting method for onions. The invention provides a high-yield planting method for onions, wherein the growth vigor of the onions can be controlled and the onions are hardly attacked by diseases. The high-yield planting method for onions comprises the following steps of: I, in a seedling period, as the onions are relatively sensitive to temperature and illumination, and seedlings are prevented from growing too large before winter, bolting appears in advance in spring the next year through a stage of vernalization; II, seedbed preparation: selecting a parcel of rice field which is relatively high in terrain, convenient to drain and irrigate and fertile in soil, and where no crops such as green onions and garlic are planted in recent years as a seedbed, preferably neutral loam; III, grading of seedlings: selecting seedlings which are developed in root system, robust to grow and uniform in size during fixed planting; and weeding out leggy seedlings, dwarf seedlings, diseased seedlings, branched seedlings and seedlings which are too large or too small; and IV, seeding quantity: the seeding quantity is further associated with robustness of the seedlings and bolting in advance; if the density is too great, the seedlings are thin and weak; if the density is too small, the seedlings are too thick, and are easy to bolt.

The invention discloses a method for regenerating lithium iron phosphate waste and belongs to the technical field of methods and devices for directly converting chemical energy into electric energy. The method comprises five steps of dissolution, composition adjustment, reduction, carbon adjustment and coprecipitation. In the method, after the carbon-coated lithium iron phosphate waste is directlydissolved, an aromatic ring and a hydrophilic group in a dispersing agent are connected through a long carbon chain, and the non-directly connected state can not only firmly absorb thin carbon particles, but also can wrap the carbon, thereby reducing the influence of nucleation and growth during carbon pair coprecipitation, assisting in the rate of alkali addition, adjusting the rising rate of pH, increasing a nucleation rate, suppressing a growth rate, and increasing the quality of the coprecipitation. Finally, the dispersing agent is decomposed by sintering to achieve carbon source coatingsynthesis, and generate lithium iron phosphate having excellent performance.