Preparation and properties of photocatalytic composites of nano TiO2/polyester sea-island filament needle punched nonwoven
-
摘要: 以德固赛P25纳米TiO2为光催化材料、去离子水为介质，分别以十二烷基硫酸钠（SDS）、十二烷基苯磺酸钠（DBS）、聚乙烯毗咯烷酮（PVP）、十六烷基三甲基溴化铵（CTAB）、聚丙烯酸钠（PAAS）为分散助剂，制得系列纳米TiO2光催化分散液。用纳米TiO2光催化分散液对涤纶海岛丝针刺无纺布（PFN-NWF）进行二浸二轧后整理，得到TiO2负载的PFN-NWF （TiO2/PFN-NWF）光催化复合材料。采用激光粒度仪、TEM、SEM、拉伸、透气等表征测试，通过静置、光催化降解辣椒油和甲醛溶液等方法评价。结果表明：分散助剂自身的酸碱属性及分子结构对纳米TiO2分散体系有重要影响，其中PAAS分散效果最佳；纳米TiO2在PFN-NWF上包覆均匀，负载率为4.79%，负载牢度高；自然光照射60 min，试样上2 mL油污达到完全自清洁效果；300 W氙灯照射2 h，TiO2/PFN-NWF光催化复合材料试样对甲醛的降解率达到95.98%，5次循环使用后，降解率为90.19%。Abstract: A series of nano TiO2 photocatalytic dispersed solutions were prepared by using deionized water as a medium, sodium dodecyl sulfate (SDS), sodium dodecyl benzene sulfonate (DBS), ployvinylpynolidone (PVP), cetyl trimethyl ammonium bromide (CTAB), polyacrylic acid sodium (PAAS) surfactant as the dispersant, respectively. The TiO2 dispersed solutions were used as a finishing agent for the polyester sea-island filament needle punched nonwoven (PFN-NWF) to prepare TiO2/PFN-NWF photocatalytic composites through the twice dip-padding technique. The morphology, structure and properties of TiO2 solutions and TiO2/PFN-NWF photocatalytic composites were investigated. The capsicol and formaldehyde solution was used as a model contaminant to evaluate the photocatalytic activity of the TiO2/PFN-NWF composites. The results indicate that the dispersion system of TiO2 significantly affected by acidity-basicity of solution and dispersant, and the dispersivity of TiO2 solution can be effectively improved by addition of PAAS. The TiO2 is well immobilized on the surface of PFN-NWF and has good load fastness, the load rate of TiO2/PFN-NWF composites could be achieved 4.79%. The TiO2/PFN-NWF composites also have excellent catalytic performance. The capsicol (2 mL) drops on the surface of TiO2/PFN-NWF composites can be completely degraded under natural light irradiation for 60 min. The degradation ratio of formaldehyde is 95.98% under xenon lamp (300 W) irradiation for 3 h, and this ratio is remained above 90.19% after five cycles.
-
Keywords:
- nano TiO2 /
- sea-island filament needle punched nonwoven /
- dispersion /
- composites /
- photocatalytic
-
-
期刊类型引用(5)
1. 郑国忠. 棉梭织布的还原染色剥色工艺探讨. 轻纺工业与技术. 2021(07): 6-7 . 
百度学术
2. 王金芳，胡海霞. 光催化自清洁汽车用纺织品技术探讨. 轻纺工业与技术. 2021(07): 8-9 . 百度学术
3. 俞丽萍，沈衍，庞乾辉，张志宇，梁云霄. 宏观尺寸大孔-介孔TiO_2-SiO_2光催化剂的制备及其在染料降解中的应用. 复合材料学报. 2019(06): 1491-1500 . 本站查看
4. 陈浩，方叶青. 探究再生中强型涤纶工业长丝技术的开发. 化工管理. 2019(21): 98-99 . 百度学术
5. 王利娜，陈钊彬，丁凯，娄辉清，辛长征. TiO_2/废弃涤纶无纺布的制备及光催化自清洁性能. 复合材料学报. 2019(11): 2509-2514 . 本站查看
其他类型引用(3)
-
计量
- 文章访问数: 746
- HTML全文浏览量: 67
- PDF下载量: 305
- 被引次数: 8
下载:
