文章摘要
纤维素/二氧化钛复合纳米纤维膜的制备及对Cu2+吸附性能
Preparation of Cellulose/Titanium Dioxide Composite Nanofiber Membrane and Its Cu2+ Adsorption Performance
  
DOI:10.16865/j.cnki.1000-7555.2018.05.022
中文关键词: 静电纺丝  纤维素  TiO2  吸附  Cu2+
英文关键词: electrospinning  cellulose  TiO2  adsorption  Cu2+
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作者单位
蔡志江1,2, 张 青1, 朱 聪1, 宋现友1, 史杏娟1 1. 天津工业大学 纺织学院 2. 先进纺织复合材料教育部重点实验室天津 300387 
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中文摘要:
      采用静电纺丝技术与水解后处理的方法相结合,制备了纤维素/TiO2复合纳米纤维膜。通过扫描电镜、红外光谱、X射线衍射、接触角及力学性能测试对复合纳米纤维膜进行了表征。结果表明,复合纳米纤维膜表面光滑,纤维呈三维杂乱排列;加入TiO2后,纳米纤维的平均直径略有下降,纤维素的结晶度减小,断裂强度降低;但亲水性大幅提升。Cu2+吸附试验结果表明,溶液pH、Cu2+初始浓度和吸附时间是影响吸附效果的重要因素,Cu2+的最大平衡吸附量可达66.54 mg/g。Cu2+在纤维素/TiO2复合纳米纤维膜上的等温吸附规律可以用Langmuir和Freundlich吸附等温模型进行描述,从相关系数来看,纤维素/TiO2复合纳米纤维对Cu2+的吸附行为用Freundlich模型描述更为合理。
英文摘要:
      The cellulose/TiO2 composite nanofiber membrane was prepared by combining electrospinning technique and hydrolysis reaction method. The characteristics of the cellulose/TiO2 composite nanofiber membrane were investigated by SEM, FT-IR, XRD, water contact angle and tensile test. It is found that the composite nanofiber has a smooth surface and random orientation. After adding TiO2, the crystallinity of the cellulose decreases and the breaking strength decreases, but the hydrophilicity becomes much better. The Cu2+ adsorption test results show that the pH value, Cu2+ initial concentration and adsorption time are the important factors affecting the adsorption performance. The maximum equilibrium adsorption capacity of Cu2+ could reach 66.54 mg/g. The Cu2+ isothermal adsorption by the cellulose/TiO2 composite nanofiber membrane can be described by the Langmuir and Freundlich adsorption isothermal models. From the view of correlation coefficient, the adsorption behavior of the cellulose/TiO2 composite nanofibers for Cu2+ is more suitably described by the Freundlich model.
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