纺织学报 ›› 2019, Vol. 40 ›› Issue (10): 33-41.doi: 10.13475/j.fzxb.20180905309

• 纤维材料 • 上一篇    下一篇

聚乙二醇对硫酸钛水热改性涤纶光催化性能的影响

韩烨1, 张辉1(), 朱国庆2, 武海良1   

  1. 1.西安工程大学 纺织科学与工程学院, 陕西 西安 710048
    2.苏州市纤维检验院, 江苏 苏州 215100
  • 收稿日期:2018-09-20 修回日期:2019-06-17 出版日期:2019-10-15 发布日期:2019-10-23
  • 通讯作者: 张辉
  • 作者简介:韩烨(1993—),女,硕士生。主要研究方向为纺织材料改性及功能性纺织产品研发。
  • 基金资助:
    国家自然科学基金面上项目(51873169);中国纺织工业联合会科技指导性项目(2017040)

Effect of polyethylene glycol on photocatalytic properties of polyethylene terephthalate fibers treated with titanium sulfate under hydrothermal conditions

HAN Ye1, ZHANG Hui1(), ZHU Guoqing2, WU Hailiang1   

  1. 1. School of Textile Science and Engineering, Xi'an Polytechnic University, Xi'an, Shaanxi 710048, China
    2. Suzhou Fiber Inspection Institute, Suzhou, Jiangsu 215100, China
  • Received:2018-09-20 Revised:2019-06-17 Online:2019-10-15 Published:2019-10-23
  • Contact: ZHANG Hui

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摘要：

为提高涤纶的光催化性能,基于水热合成技术,采用硫酸钛、尿素和聚乙二醇在涤纶表面负载纳米TiO2颗粒,研究了TiO2改性涤纶紫外线辐照光催化降解亚甲基蓝染料的性能,并借助扫描电子显微镜、粒度分析仪、X射线衍射仪等仪器对改性涤纶光催化性能增强的原因进行分析。结果表明:聚乙二醇的质量浓度和相对分子质量会对水热条件下硫酸钛和尿素在涤纶表面生成的纳米TiO2颗粒大小和负载量产生影响;与未添加聚乙二醇相比,400添加聚乙二醇400浓度为12.5 mL/L时,涤纶纤维表面负载的纳米TiO2颗粒增加,且晶粒尺寸减小为9.4 nm,并且经紫外线辐照120 min后,TiO2改性涤纶降解亚甲基蓝染料总有机碳含量值由0.001 11%降至0.000 46%。

关键词: 染色废水, 涤纶, 纳米TiO2, 聚乙二醇, 亚甲基蓝染料, 光催化降解

Abstract:

In order to investigate the effect of TiO2 particle sizes on the photocatalytic activity of TiO2-coated polyethylene terephthalate (PET) fibers, nano-scaled TiO2 particles were loaded on the surface of PET fibers treated with titanium sulfate, urea and polyethylene glycol as raw materials by a hydrothermal method. The photocatalytic degradation of methylene blue (MB) dye solution by the TiO2-coated PET fibers was measured under ultraviolet (UV) irradiation. The reasons for the improvement of photoactivity by using polyethylene glycol (PEG) as a dispersing agent were studied by scanning electron microscope, laser particle size analyzer, X-ray diffraction, and so on. It is found that the particle size and loading amount of TiO2 nanoparticles loaded on PET fibers are affected by the dosage and molecular weight of PEG used. In comparison with the TiO2-coated PET fibers without adding PEG, the TiO2-coated PET fibers treated with 12.5 mL/L of PEG400 can efficiently photodegrade the MB dye solution due to the small average particle size of 9.4 nm TiO2 particles. In addition, the total organic carbon(TOC) contents of methylene blue dye aqueous solution in the presence of TiO2-coated PET fibers decrease from 0.001 11% to 0.000 46% after being exposed to 120 min of UV irradiation.

Key words: dyeing wastewater, polyethylene terephthalte fiber, nano-scaled TiO2, polyethylene glycol, methylene blue dye, photocatalytic degradation

中图分类号: 

  • TS151

图1

添加不同含量和分子质量PEG负载TiO2涤纶扫描电镜照片 (×2 000)"

图2

TiO2颗粒粒度分布曲线"

图3

纳米TiO2颗粒XRD谱图"

图4

纳米TiO2颗粒N2吸附-脱附等温线"

图5

纳米TiO2颗粒孔径分布曲线"

表1

负载TiO2涤纶纤维表面元素分析结果"

样品
编号		 元素 结合能/
eV		 半高宽/
eV		 原子百分比/
%
1# O1s 532.0 3.030 20.31
Ti2p 463.1 0.258 0.29
N1s 405.9 0.222 0.31
C1s 284.4 1.951 79.09
3# O1s 531.7 2.891 23.63
Ti2p 458.8 1.492 0.49
N1s 399.0 0.265 0.68
C1s 283.6 2.208 75.20

图6

未添加PEG(1#)和添加1.0 mL的PEG400(3#)改性涤纶纤维X射线光电子能谱图"

图7

未添加PEG和添加1.0 mL的PEG400改性涤纶漫反射光谱曲线"

图8

负载TiO2涤纶紫外线辐照光催化降解亚甲基蓝染料动力学拟合结果"

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