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Date of Publication:2007-01-01

Journal:大连理工大学学报

Affiliation of Author(s):材料科学与工程学院

Issue:4

Page Number:521-526

ISSN No.:1000-8608

Abstract:With the principle of phase inversion, a wet-casting method was used to fabricate polyurethane (PU) compact or porous coatings. It is observed that the surface morphologies of porous coating such as the pore diameters were mainly affected by the concentration of solution and the relative humidity of air. In order to test the properties of PU coatings, experiments including immerging test in Hank's solution, measurement of hydrophilic/hydrophobic properties and blood compatibility were carried out. The results showed that the pore diameters of PU porous coatings were regular and the pore sizes were in the range of 1 ��m to about 30 ��m during the phase inversion process. After three months in Hank's solution, the surface of PU porous coatings hardly changed and no coatings flaked away from the substrates. The measurement of contact angle indicated that the surfaces of porous coatings came to be super-hydrophobic. Furthermore, PU porous coatings deposited the least platelets and prolonged the anticoagulation time. It is concluded that the PU porous coatings have excellent blood-compatibility.

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