摘要
为提高负载TiO_(2)棉纤维的染色性能,采用一步法硫酸钛-尿素-壳聚糖处理棉纤维(壳聚糖-TiO_(2)),实现棉纤维表面壳聚糖改性及TiO_(2)同步负载。以活性染料KN-G对壳聚糖-TiO_(2)改性棉纤维进行染色,并对纤维的形貌、结构、热学及光学性能进行表征,同时测试了其拉伸、染色及光催化自清洁性能。结果表明:壳聚糖-TiO_(2)改性工艺显著影响TiO_(2)颗粒在棉纤维表面的分布状态,但对其晶体结构和热稳定性影响较小。TiO_(2)通过C—Ti键与纤维发生化学结合,壳聚糖则通过氢键吸附于纤维表面。虽然TiO_(2)负载导致棉纤维拉伸性能有所下降,但壳聚糖的引入可一定程度上缓解力学性能的降低。壳聚糖-TiO_(2)改性棉纤维的断裂强度和断裂伸长率分别下降25.7%和13.5%。同时,其染色性能明显提升,上染率由82.5%提高至88.7%,K/S值由12.1增至16.7。改性棉纤维表现出优异的光催化自清洁能力,光照480 min可有效去除火龙果汁污渍。认为:一步法制备的壳聚糖-TiO_(2)改性棉纤维染色性能提升,工艺简便,具有较好的应用前景。
To enhance the dyeing performance of TiO_(2)-loaded cotton fibers,one-step method titanium sulfateurea-chitosan treatment(chitosan-TiO_(2))was used on cotton fibers,whihch achieves surface chitosan modification of cotton fibers and loading of TiO_(2).Reactive dye KN-G was used for dyeing chitosan-TiO_(2) modified cotton fiber,and the modified fibers were characterized in terms of morphology,structure,thermal and optical property.Tensile strength,dyeing performance and photocatalytic self-cleaning property were also evaluated.The results showed that the chitosan-TiO_(2) treatment process significantly influenced the distribution of TiO_(2) particles on the cotton fiber surface,while having little effect on their crystalline structure and thermal stability.TiO_(2) chemically bonded with the fibers through C—Ti bonds,whereas chitosan was physically adsorbed via hydrogen bonding.Although the loading of TiO_(2) led to a reduction in the tensile property of the fibers,the introduction of chitosan partially mitigated this mechanical deterioration.Breaking strength and breaking elongation rate of the chitosan-TiO_(2) modified fibers were reduced 25.7%and 13.5%,respectively.Furthermore,dyeing performance of the fiber was significantly enhanced,dye-uptake was increased from 82.5%to 88.7%,and the K/S value was rose from 12.1 to 16.7.Notably,the modified cotton fibers demonstrated excellent photocatalytic self-cleaning property.After 480 minutes of light exposure,the pitaya juice stains could be effectively removed.It is considered that the chitosan-TiO₂modified cotton fibers prepared via one-step method exhibit enhanced dyeing performance,with the straightforward process demonstrating promising application prospects.
作者
梁煜佳
张辉
车秋凌
赵培灼
夏泓蕙
王毅
LIANG Yujia;ZHANG Hui;CHE Qiuing;ZHAO Peizhuo;XIA Honghui;WANG Yi(School of Textile Science and Engineering,Xi'an Polytechnic University,Xi'an,710048,China;Anta(China)Co.,Ltd.,Quanzhou,362200,China;Xi'an Textile Supervision and Inspection Institute,Xi'an,710068,China)
出处
《棉纺织技术》
2025年第8期40-48,共9页
Cotton Textile Technology
基金
国家自然科学基金项目(51873169)
2025年泉州市级科技计划项目(2025QZG01)。
