| 摘要 |
The invention relates to a material comprising a sheet-like substrate and a polymer gradient coating on at least a part of the surface of the substrate, wherein the coating representing a surface composition gradient, such as a pH gradient or a hydrophilicity/hydrophobicity gradient in at least one direction along the surface of the substrate. The invention also relates to a process for the production of the material with the substrate comprising the steps of i. providing the sheet-like substrate; ii. providing monomers for the polymer gradient layer; iii. applying the monomers onto the surface of the substrate; and iv. bringing the monomers to polymerises, where the monomers being applied onto the surface so that the layer or the composition of monomers varies continuously or stepwise in at least one direction along the surface of the substrate to thereby provide a surface composition gradient. The method may preferably include applying the polymer gradient coating using a plasma process. |
