Mechanisms of imparting

The third mechanism of imparting steric stabilization differs from the preceding two in that the enthalpy and entropy contributions to the free energy of flocculation act in concert instead of in opposition. Both now contribute to stability since AHp is positive and dSp is negative. The magnitudes of their respective contributions to AGp are no longer important This is termed combined enthalpic-entropic stabilization. 

Another commercially available coating uses the anticoagulant heparin. Heparin coatings have two different mechanisms of imparting hemocompatibility. Heparin-releasing surfaces slowly release bound heparin, in an effective but impermanent route to hemocompatibility 19). Another way of utilizing heparin is to inunobilize the molecule by covalent linkage with the polymer surface 19, 20). 

Figure 7 Structure of glycine-linked cellulose conjugates offyso nne. Mechanisms of Imparting Antimicrobial Activity to Fibrous Substrates...

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