功能性羊毛纤维的制备

The preparation of functional wool fibers

以钛酸四丁酯为前驱体,在水热环境中直接将纳米二氧化钛负载到羊毛纤维表面,使用扫描和透射电镜、红外光谱、热重和漫反射光谱测试技术对羊毛纤维改性前后表面形貌、结构、热学和光学性能进行了表征,并测定羊毛纤维拉伸、表面摩擦和自清洁性能.研究结果表明,钛酸四丁酯合成的锐钛矿型纳米二氧化钛颗粒平均粒径约5nm,通过化学键接枝在羊毛纤维表面.较未处理羊毛纤维,改性后的羊毛纤维热学性能变化不明显,吸收紫外线能力有所增强,断裂伸长率有所增加,摩擦因数增大而摩擦效应减小,具有光催化自清洁性能.

Nano-sized titanium dioxide particles prepared at 110 ℃ by hydrothermal precipitation method were directly immobilized on the surface of wool fiber using tetrabutyl titanate. Scanning electrom microscopy （SEM）, transmission electrom microscope（TEM）, infrared spectroscopy（IR）, and thermal gravimetry （TG） were employed to study and compare the surface morphology,microstructure,and thermal stability of the fibers before and after modification. And diffuse reflectance spectrum （DRS）,tensile, directional frictional effect and self-cleaning property of the fibers were also measured. After modification with tetrabutyl titanate by hydrothermal method, the surface of the wool fiber was covered with anatase titanium dioxide pellets of average size 5nm or so,and chemical reaction had taken place between the fiber and titanium dioxide. The thermal stability of TiOz-coated fibers wasn＇t obviously changed,and the anti-ultraviolet irradiation capability and the self-cleaning ability was improved significantly. The tensile properties increased slightly. Friction coefficient increased,but frictional effectiveness decreased.