Izlaganje sa skupa

Nonionic Hydrophilic Surfaces: Adsorption and Interactions

Per Stenius ; Institute for Surface Chemistry, Box 5607, S-11486 Stockholm, Sweden
Johan Berg ; The Surface Forces Group, Department of Physical Chemistry, Royal Institute of Technology, S-100 44 Stockholm, Sweden, and Institute for Surface Chemistry
Per Claesson ; The Surface Forces Group, Department of Physical Chemistry, Royal Institute of Technology, S-100 44 Stockholm, Sweden, and Institute for Surface Chemistry
Carl Gustaf Golander ; Institute for Surface Chemistry, Box 5607, S-11486 Stockholm, Sweden
Christina Herder ; The Surface Forces Group, Department of Physical Chemistry, Royal Institute of Technology, S-100 44 Stockholm, Sweden, and Institute for Surface Chemistry
Bengt Kronberg ; Institute for Surface Chemistry, Box 5607, S-11486 Stockholm, Sweden

Sažetak

An overview is given of recent studies of nonionic, hydrophilic surfaces formed by the adsorption of surfactants or surface active polymers. Hydrophobic surfaces can be easily hydrophilized by the adsorption of nonionic surfactants or block copolymers containing hydrophobic chain segments; the cooperative interaction between the hydrocarbon moieties contributes more to the free energy of adsorption than the interaction with the hydro- phobic surface.
Hydrophilic layers are also readily formed on hydrophilic surfaces provided specific interaction between the hydrophilic end groups and the surface creates a sufficiently hydrophobic surface so that a second layer can be formed through cooperative interaction. The temperature dependence of the interaction forces between layers of surfactants can be closely correlated with their phase equilibria with water.
In order to prevent protein adsorption the surface should be neither charged nor hydrophobic; it is shown that, accordingly, protein adsorption is extremely low on polyethylene oxide-covered surfaces.

Ključne riječi

Hrčak ID:

137387

URI

https://hrcak.srce.hr/137387

Datum izdavanja:

28.12.1990.

Posjeta: 646 *