纳米ZnO/有机氟水性聚氨酯整理汉麻织物的研究

Study on hemp fabric finished by nano-ZnO/organic fluorine waterborne polyurethane

研究纳米ZnO/有机氟改性水性聚氨酯乳液的性能,并将其应用于汉麻织物的整理。以γ-氨丙基三乙氧基硅烷改性纳米ZnO,然后以聚四氢呋喃醚二醇、异佛尔酮二异氰酸酯为主要原料,改性纳米ZnO和全氟辛醇为改性单体,采用逐步聚合法制备纳米ZnO/有机氟改性水性聚氨酯乳液。利用傅里叶红外光谱以及扫描电子显微镜等对乳液及胶膜的性能和结构进行表征,并对整理后汉麻织物的性能进行测试。结果表明:改性纳米ZnO和全氟辛醇成功引入到聚氨酯主链中,且含氟和含硅链段向胶膜表面迁移,降低了表面能,使得胶膜具有良好的疏水性能。整理后的汉麻织物防紫外线性能明显提升,对金黄色葡萄球菌的抑菌率达92.3%,断裂强力由400 N提升至503 N,且经整理的汉麻织物具有良好的柔软性以及抗污性。

The property of nano-ZnO/organic fluorine modified waterborne polyurethane emulsion were studied.It was applied to the finishing of hemp fabrics.Nano-ZnO was modified byγ-aminopropyl triethoxysilane.Nano-ZnO/organic fluorine modified waterborne polyurethane emulsion was prepared by step polymerization method,polytetrahydrofuranediol and isophorone diisocyanate were used as main raw materials,modified nano-ZnO and perfluorooctanol were used as modified monomers.The property and structure of the emulsion and film were characterized by Fourier infrared spectroscopy and scanning electron microscopy.The property of the finished hemp fabric were measured.The results showed that nano-ZnO and perfluorooctanol were successfully introduced into the polyurethane main chain,and the fluorine-containing and silicon-containing chain segments were migrated to the surface of the film.The surface energy was reduced making the film with better hydrophobic property.The UV resistance of the finished hemp fabric was obviously improved.The antibacterial rate of Staphylococcus aureus was 92.3%.The breaking strength was increased from 400 N to 503 N.The finished hemp fabric had better softness and stain resistance.