37results about How to "Has a hollow structure" patented technology

The invention discloses a method for preparing a hollow spherical ferroferric oxide nano material, which comprises the following steps: dissolving ferric chloride hexahydrate in glycol or diethylene glycol and stirring the solution uniformly, wherein the dosage of the glycol or diethylene glycol is 1 to 4 milliliters of glycol or diethylene glycol per millimol of ferric chloride hexahydrate; dissolving anhydrous sodium acetate or sodium succinate or a mixture of anhydrous sodium acetate and sodium succinate in any ratio in solution prepared by the step 1 and stirring the mixed solution with ultrasonic waves to obtain uniform yellow brown sticky solution, wherein the mass ratio of the anhydrous sodium acetate or sodium succinate to the ferric chloride hexahydrate is 1:1 to 4:1; and transferring solution obtained by the step 2 to a liner of a water hydrothermal kettle, closing the kettle for reaction at 180 to 220 DEG C for 6 to 16 hours, naturally cooling the resulting product to room temperature, taking a sample out of the kettle and washing the sample with water and ethanol sequentially to obtain the hollow spherical ferroferric oxide nano material.

The invention relates to a method for preparing ellipsoidal ion-doped hydroxyapatite microspheres with porous surfaces. According to the method disclosed by the invention, ellipsoidal hydroxyapatite microspheres are prepared from ellipsoidal calcium carbonate microspheres as a precursor and the support of a plurality of trace ions (Mg, Sr, Zn, Ag, Fe, Si, Y, F, Cl and the like) and fluorescent ion (Eu) is achieved. No surfactant is used in the preparation process of ellipsoidal hydroxyapatite microspheres and ellipsoidal calcium carbonate microspheres, and the sizes of the obtained ellipsoidal hydroxyapatite microspheres and ellipsoidal calcium carbonate microspheres are uniform and the obtained ellipsoidal ion-doped hydroxyapatite microspheres have the characteristics of relatively high specific surface area, fluorescent tracing and bacteriostasis and other properties and are capable of adsorbing positively charged polymers. The hollow or solid ellipsoidal ion-doped hydroxyapatite microspheres prepared by the method disclosed by the invention can be applied as a drug carrier material, a bone repair material, an environmental water treatment material, food or cosmetics additives and the like.

The invention discloses a preparation method of calcium fluoride microspheres, which uses an acid-base titration method to keep the solution acidic, dissolves insoluble calcium and phosphorus salts to generate calcium ions, and adds soluble fluoride salt solutions to provide fluoride ions, thereby preparing fluoride Calcium (CaF 2 )Microspheres. The steps are to put insoluble calcium calcium phosphate into the weakly acidic solution maintained by acid-base titration, stir with a magnetic stirrer for 1 hour to form a suspension, add a certain amount of soluble fluorine salt solution, and stir with a magnetic stirrer 24 hours. The suspension was filtered successively with distilled water and absolute ethanol, and then dried at 40°C to obtain calcium fluoride (CaF 2 )Microspheres. The method has simple steps, mild conditions and is easy for industrial production.

The invention relates to the field of cultural relic detection, and discloses a high sensitivity detection method for a silk cultural relic. The method comprises the following steps of: preparing puresilk fibroin powder, and simultaneously extracting the silk fibroin in a cultural sample; sequentially modifying gold nanoparticles, hollow polyacrylic acid-dopamine complex, polymethyl methacrylate-maleic anhydride / 1-octadecene alternating copolymer spherical nanobead, mouse anti-silk fibroin monoclonal antibody on the surface of cleaned glassy carbon electrode by a layer-by-layer self-assemblymethod under the action of NHS / EDC solution; and detecting the silk fibroin solution and the cultural sample solution by using the modified electrode. The high sensitivity detection method for the silk cultural relic has high sensitivity, low detection limit and good reproducibility, and can detect the silk cultural relics with high sensitivity.

The invention discloses an adjustable bicycle head vertical rod. Two sleeves which are used for conveniently fixing a front fork vertical rod and a bicycle head cross handle in an insertion sleeved way respectively are arranged at the two ends of the bicycle head vertical rod; a sleeve orifice of at least one end is a slot-shaped pipe orifice; at least one open slot which can conveniently clamp a pipe fitting through a clamping mechanism is formed at the slot-shaped pipe orifice along the axial direction; an adjustment block which is detachable and is provided with a crescent cross section is arranged on the lateral part of the slot-shaped pipe orifice; when the adjustment block is inserted into one side on the inner part of the slot-shaped pipe orifice, a circular orifice by which the pipe fitting is convenient to fasten is formed by the crescent cross section and the slot-shaped pipe orifice; the sleeve with the slot-shaped pipe orifice consists of a left half pipe orifice and a right half pipe orifice; the left half pipe orifice is integrated with the bicycle head vertical rod; two open slots are formed by folding the left half pipe orifice and the right half pipe orifice; and the side face of the adjustment block consists of a convex arc-shaped surface which can be tightly attached to the inner side of the slot-shaped pipe orifice and a concave arc-shaped surface which can be tightly attached to the surface of the bicycle head cross handle. By the bicycle head vertical rod, the distance between the front fork vertical rod of which the two ends are fixedly connected with each other and the bicycle head cross handle can be adjusted, so that the distance between the bicycle head cross handle and a bicycle cushion can be adjusted, and a humanized design is realized.

The invention discloses a preparation method of a high-power lithium ion battery negative electrode material. The preparation method comprises the following steps: firstly, preparing Zn / Co-ZIF; mixinga ferrite solution, a cobalt salt solution and a nickel salt solution with a Zn / Co-ZIF solution in a protective gas, adding a 2-methylimidazole solution, uniformly stirring, standing, carrying out suction filtration, washing, and drying to obtain Zn / Co-ZIF coated Fe / Co / Ni-ZIF with the core-shell structure; and finally, sequentially calcining Zn / Co-ZIF@Fe / Co / Ni-ZIF in protective gas and air to obtain the high-power lithium ion battery negative electrode material. Zn / Co-ZIF@Fe / Co / Ni-ZIF with a core-shell structure is used as a precursor to perform two-step calcination in protective gas and airto obtain the high-power lithium battery negative electrode material, and the preparation method is simple in preparation process, mild in condition and suitable for industrial production.