中文摘要：

摘要：应用vanOss—Chaudhury—Good组合路易斯酸碱理论，对纳米碳酸钙原位改性的洋麻纤维表面能及其Lewis酸碱力进行计算，并通过对洋麻纤维／聚丙烯复合材料拉伸力学的测试对纤维表面特性进行表征。结果表明，接触角数值随测试液体极性分量的减小而降低；原位改性使洋麻纤维的总表面能变化不大，但其极性分量由0．094减小为0．025，Lewis碱性力由7．49增加为30．71；洋麻改性纤维制得的复合材料拉伸强度和弹性模量提高了9．92％和25．88％。

英文摘要：

With the van Oss-Chaudhury-Good theory, the surface free energy and Lewis acid-base compo- nent of kenaf fiber whose surface was in situ deposited by calcium carbonate nanoparticles were calculated. And the tensile strength and tensile modulus of the kenaf fiber/PP composites were tested to characterize the interface properties. The results show that the contact angles decrease with the decrease of the polar component of the test liquid; the surface free energy of the modified kenaf fiber dose not changed significantly, but the polar compo- nent decreases from 0.094 to 0.025, and the Lewis basic component increases from 7.49 to 30.71; the tensile strength and tensile modulus of the modified kenaf fiber/PP composites increase by 9.92% and 25.88%, respectively.