树莓状超疏水多孔复合棉纤维的制备及油水分离性能

doi:10.7503/cjcu20190021

高等学校化学学报 ›› 2019, Vol. 40 ›› Issue (8): 1775.doi: 10.7503/cjcu20190021

树莓状超疏水多孔复合棉纤维的制备及油水分离性能

刘耘, 李婷, 汪洋, 东为富

江南大学合成与生物胶体教育部重点实验室, 化学与材料工程学院, 无锡 214122

收稿日期:2019-01-09 修回日期:2019-06-04 出版日期:2019-08-10 发布日期:2019-08-02
通讯作者: 东为富,男,博士,教授,主要从事聚合物纳米复合材料方面的研究.E-mail:wfdong@jiangnan.edu.cn E-mail:wfdong@jiangnan.edu.cn
基金资助:
国家自然科学基金（批准号：51373070）和合成与生物胶体教育部重点实验室开放研究课题基金（批准号：JDSJ2018-01）资助.

Preparation of Multi-scale Superhydrophobic Cotton/Polydopamine/Silica Composite for Selective Oil Absorption

LIU Yun, LI Ting, WANG Yang, DONG Weifu

The Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China

Received:2019-01-09 Revised:2019-06-04 Online:2019-08-10 Published:2019-08-02
Supported by:
Supported by the National Natural Science Foundation of China(No.51373070) and the Open Research Fund Program of the Key Laboratory of Synthetic and Biological Colloids, China(No.JDSJ2018-01).

摘要/Abstract

摘要： 基于聚多巴胺（PDA）的化学性质和树莓状纳米粒子的粗糙结构，以聚多巴胺包覆的棉纤维为基底，制备了具有多重粗糙度的树莓状超疏水多孔复合棉纤维材料.通过扫描电子显微镜观察树莓状超疏水多孔复合棉纤维表面的微观形貌，PDA-SiO₂纳米粒子稳定地固定在聚多巴胺涂覆的棉纤维表面.经过氟化改性的树莓状超疏水多孔复合棉纤维具有超疏水性，水接触角为158.2°，油接触角为0°.油/水分离实验结果表明，树莓状超疏水多孔复合棉纤维对己烷/水混合物的分离效率可达99.4%以上，使用20次后仍维持较高的分离效率.同时，其具有较高的溶剂吸附能力（13~34 g/g）、重复使用性及机械稳定性，吸油能力可与硅气凝胶相媲美.

关键词: 聚多巴胺, 树莓状纳米粒子, 棉纤维, 油水分离, 吸油能力

Abstract: Owing to the chemical properties of polydopamine(PDA) and the hierarchical nanostructured of raspberry-like nanoparticles, the raspberry-like nanoparticles(PDA-SiO₂) were fixed onto the polydopamine coated cotton fibers to fabricate a super-hydrophobic cotton fibers with a micro-and nanostructure surface.Scanning electron microscope(SEM) results demonstrated that raspberry-like nanoparticles(PDA-SiO₂) were stably fixed on the cotton fibers surface. By introducing the incorporation fluorinated alkyl silane to the cotton fibers via a facile chemical reaction process, the cotton fibers surface possessed super-hydrophobicity with the water contact angle of 158.2° and super-oleophilicity with the oil contact angle of 0°. The as-prepared cotton fibers can be applied as effective materials for the separation of water and oil mixture with separation efficiency as high as 99.4%. In particular, the as-prepared cotton fibers showed excellent oil/water absorption selectivity with a high oil absorption capacity of 34 g/g. Moreover, the absorbed oils can be recovered by simple mechanical squeezing, and the porous cotton fibers maintained a high oil-absorption capacity upon multiple squeezing absorption cycles, displaying excellent recyclability. Therefore, this reported cotton fibers has the advantages of high separation efficiency, high absorption capacity, and outstanding durability, exhibiting the strong potential for industrial production.

Key words: Polydopamine, Raspberry-like nanoparticles, Cotton fiber, Oil/water separation, Oil absorption

中图分类号:

O633
O647.5

TrendMD:

刘耘, 李婷, 汪洋, 东为富. 树莓状超疏水多孔复合棉纤维的制备及油水分离性能. 高等学校化学学报, 2019, 40(8): 1775.

LIU Yun, LI Ting, WANG Yang, DONG Weifu. Preparation of Multi-scale Superhydrophobic Cotton/Polydopamine/Silica Composite for Selective Oil Absorption. Chem. J. Chinese Universities, 2019, 40(8): 1775.

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树莓状超疏水多孔复合棉纤维的制备及油水分离性能

Preparation of Multi-scale Superhydrophobic Cotton/Polydopamine/Silica Composite for Selective Oil Absorption

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