61results about How to "Shape and size controllable" patented technology

The invention relates to a method for preparing a nano-porous structure based on nano-particle self-assembly. Particularly, a capillary tube serves as a support body, and relying on the support body, nano-particles are self-assembled at the pointed end of the capillary tube through a cross-linking agent to form the nano-porous structure. The method for preparing the nano-porous structure is simple and low in cost, has the advantages that the nano aperture is adjustable in size, is convenient to move and position, and has an extensive application range.

The invention provides a preparation method of a MoS2 / Fe3O4 nano composite material, belonging to the technical field of preparation of nano inorganic functional materials. The preparation method taking Fe3O4 nano particles as the raw material comprises the following specific steps of: dispersing the Fe3O4 nano particles in de-ionized water, adding sodium molybdate, sodium chloride, sodium thiocyanate and a surface active agent CTAB (Cetyltrimethyl Ammonium Bromide), after stirring for a period of time, adjusting pH by using hydrochloric acid, then, pouring the mixture into a stainless steel reaction kettle with a polytetrafluoroethylene liner, and naturally cooling after reacting at the pre-set temperature for a period of time; and centrifugally washing a reaction product by using the de-ionized water for several times, and drying the product to obtain the MoS2 / Fe3O4 nano composite material. The method disclosed by the invention has the advantages of being simple in process, rapid, high-efficiency and the like; MoS2 is well wrapped on the Fe3O4 nano particles; and the MoS2 / Fe3O4 nano composite material prepared by the invention is good in crystallinity, controllable in morphology and size and good in adsorption property.

The invention provides a calcium and phosphate salt biofilm layer and an electrochemistry modification method thereof. The electrochemistry modification method comprises: carrying out an acid etching treatment, wherein an implant covered with a plasma-coated calcium and phosphate salt biofilm layer is placed into a dilute acid solution, shocking is performed for 1-2 min, ultrasonic cleaning is performed for 1-50 seconds in deionized water, and the obtained implant is taken out and is subjected to air-drying so as to be spare; preparing an electrolyte, wherein the electrolyte is a mixed aqueous solution comprising Ca(NO3)2 with a concentration of 0.001-0.5 mol / L and NH4H2PO4 with a concentration of 0.001-0.5 mol / L, the pH value of the electrolyte is 3-7, and deposition is performed in the electrolyte with a temperature of 50-100 DEG C; and carrying out electrochemical deposition, wherein the time T' is maintained under an electric potential V', the time Tn is maintained under an electric potential Vn, the time T1 is maintained under an electric potential V1, the time T2 is maintained under an electric potential V2, the absolute value of the V' is greater than the open circuit potential, Vn is more than V2, V2 is more than V1, and the sum of the Tn, the T1 and the T2 is 60-180 seconds. The calcium and phosphate salt biofilm layer modified through the method has high bonding strength with the substrate, and has high biological activity.