3 results about "Surface chemical" patented technology

The invention relates to a preparation method of a graphite sheet surface chemical plating iron-nickel alloy layer. The preparation method comprises the following steps of 1, carrying out degreasing treatment on a graphite sheet; 2, carrying out oxidation treatment on the graphite sheet subjected to degreasing treatment; 3, carrying out the following sensitized treatment on the graphite sheet by utilizing a stannous chloride solution; 4, carrying out activating treatment on the graphite sheet by utilizing a palladium chloride solution; 5, sequentially adding 8-10 parts of C6H5Na3O7.2H2O powder, 4-5 parts of NH4Cl2 powder, 3-6 parts of FeSO4.7H2O powder, 2-3 parts of NiSO4.6H2O powder and 2-4 parts of NaH2PO2.H2O powder into ultra-pure water according to the mass ratio so as to fully dissolve the powder, adopting a NaOH aqueous solution as a pH adjustment solution, and dropwise adding the pH adjustment solution with the pH being controlled in a range of 9-9.5 to prepare a plating solution for surface chemical plating of the graphite sheet; 6, carrying out chemical plating treatment on the graphite sheet subjected to preliminary treatment. The preparation method is convenient in manufacturing and simple in process, and a compact and uniform plating layer with controllable thickness can be obtained on the surface of the graphite sheet.

The invention discloses a preparation method of a mixed-mode liquid chromatography filler based on a single selector. The method comprises the following steps: firstly obtaining silane with amide/amine multiple polar groups through a selective amidation technology, then immobilizing the silane on silica gel, and finally masking residual silicon hydroxyl by using a conventional alkaline small-molecular end-capping agent to prepare a class of novel high performance liquid chromatography stationary phases. According to the method disclosed by the invention, the adopted selective amidation has reaction specificity, the preparation process adopts a one-pot multi-step reaction method, the use amount of a solvent is reduced, the surface chemical property of the obtained filler is homogeneous, the filler has remarkable alkalinity and excellent hydrophilicity, and the problems that the conventional mixed mode filler is non-homogeneous and is disordered in application, and the defects that a conventional mixed mode filler is heterogeneous, mixed and disordered during application, and unstable in batch repeatability and chromatographic reproducibility of the filler are overcome.