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Citation: CHEN Bao-Lin, JI Jian, JI Ren-Tian, Qiu Yong-Xing, FENG Lin-Xian. Surface Property and Blood Compatibility of Biomolecular Modified Polyurethane[J]. Chinese Journal of Applied Chemistry, ;2001, 18(5): 384-388. shu

Surface Property and Blood Compatibility of Biomolecular Modified Polyurethane

1.
a Department of Chemistry, Hulunbeier College, Hailaer;
2.
b Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027

Received Date: 8 January 2001
Available Online: 19 March 2001
Fund Project: 国家自然科学基金资助项目(29804009) (29804009)

A series of biomolecular modified polyurethane were prepared. PEU-g-PEO-SO₃Na, PEU-g-PEO-C₁₈, PEU-g-PEO-SO₂Lys, PEU-g-PEO-SO₂Tyr, their surface properties were investigated by contact angle measurement. The polymer-water interface free energy V_SW, the contribution of its polarity V_SV^p and its non-polarity V_SV^d were obtained by using captive bubble method. The results indicate that in the sulfonate modified PEU surface, the value of V_SW increased with the content of PEO. When Lys or Tyr was grafted on the end of sulfonate PEU side chain, V_SW decreased. The blood compatibility of the biomolecular modified polyurethanes was determined by measurements of platelet adhesion, plasma recalcification time (RTT) and prothrombin time (PTT). All biomolecular modified polyurethanes show good blood compatibility and potential in coating materials in blood contact device.
- bioactive moiety,
- functionalized polyurethane,
- contact angle,
- blood compatibity
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