Molecules 2023 , 28 , 7984
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ȱ Figure6. The structure diagram of polyelectrolyte brushes: ( a ) Planar polymer brushes, ( b ) Spherical polymer brushes, and ( c ) Star-polymer.
5.1. Synthesis Methods 5.1.1. Physisorption
Physisorption is a reversible process, which is the self-assembly process of macro- molecules with surface activity or polymers with end group functional groups [133], as shown in Figure 7A. Both graft copolymers and block copolymers can be formed by ph- ysisorption. The essence of the process is based on selective solvation. The insoluble segments settle down and affix on the matrix, while the dissolved segments stretch, form- ing a polymer brush. Additionally, polymer brushes can also be formed when selective adsorption of graft copolymers occurs on the substrate surface.
Figure7. Schematic representation of physisorption ( A ) and covalent attachment ( B ).
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