阳离子可染抗紫外聚酰胺6纤维的制备与性能研究

Preparation and properties of cationic dyeable and ultraviolet resistant polyamide 6 fibers

以锐钛矿型二氧化钛(TiO_(2))原粉为原料,以氧化铝(Al_(2)O_(3))和间苯二甲酸-5-磺酸钠(5-SSIPA)对TiO_(2)进行表面改性,制备了一款双功能添加剂(TiO_(2)@Al@5-SSIPA),并通过原位聚合及熔融纺丝制备了阳离子可染抗紫外聚酰胺6(TiO_(2)@Al@5-SSIPA@PA 6)纤维,研究了5-SSIPA用量、研磨活化时间等对TiO_(2)表面Zeta电位及有机物修饰量的影响,通过高分辨率透射电子显微镜及X射线光电子能谱仪对其形貌及表面成分进行表征,并对TiO_(2)@Al@5-SSIPA@PA 6纤维进行织布,评价了其染色及抗紫外性能。结果表明:经质量分数5.0%的Al_(2)O_(3)包膜后,TiO_(2)表面Zeta电位由-43.5 mV变为34.3 mV;在5-SSIPA质量分数为13%、研磨活化时间为1 h的条件下,Al_(2)O_(3)包膜TiO_(2)表面5-SSIPA的修饰量达9.5%,与未包膜TiO_(2)相比提高了近10倍;采用阳离子兰染色TiO_(2)@Al@5-SSIPA@PA 6纤维织物,上染率达45%,紫外线透过率小于2.5%,抗紫外因子值大于50,满足GB/T 18830—2009对“防紫外产品”的规定。

A bifunctional additive(TiO_(2)@Al@5-SSIPA)was prepared by the surface modification of titanium dioxide(TiO_(2))with alumina(Al_(2)O_(3))and sodium 3,5-dicarboxybenzenesulfonate(5-SSIPA)with anatase TiO_(2) powder as raw material.Cationic dyeable and ultraviolet(UV)resistant polyamide 6(TiO_(2)@Al@5-SSIPA@PA6)fibers were prepared through in-situ polymerization and melt spinning process.The effects of 5-SSIPA dosage,grinding activation time and other factors on the surface zeta potential and organic modification amount of TiO_(2) were studied.Their morphology and surface composition were characterized by high resolution transmission electron microscopy and X-ray photoelectron spectroscopy.And TiO_(2)@Al@5-SSIPA@PA6 fibers were woven to evaluate their dyeing properties and UV resistance.The results showed that the surface zeta potential of TiO_(2) changed from-43.5 mV to 34.3 mV after being coated with 5%Al_(2)O_(3) by mass fraction;the modification amount of 5-SSIPA on the surface of Al_(2)O_(3) coated TiO_(2) reached 9.5%,which was nearly 10 times higher than that of uncoated TiO_(2),under the conditions of 13%5-SSIPA by mass fraction and grinding activation time of 1 h;and TiO_(2)@Al@5-SSIPA@PA 6 fabric dyed with cationic blue had a dye uptake of 45%,UV transmittance lower than 2.5%and UV resistance factor value above 50,meeting the requirements of GB/T 18830-2009 for UV resistant products.