Surface modification of melamine sponges for pH-responsive oil absorption and desorption

Lei, Zhiwen1; Zhang, Guangzhao1; Deng, Yonghong2; Wang, Chaoyang1

2017-09-15

10.1016/j.apsusc.2017.04.165

APPLIED SURFACE SCIENCE   影响因子和分区

0169-4332

1873-5584

Inspired by the development of smart oil/water separation materials, a pH responsive melamine sponge has been obtained by grafting poly (4-vinylpyridine) on the skeleton surface through atom transfer radical polymerization. Through scanning electron microscopy and x-ray photoelectron spectroscopy, the successful grafting of poly (4-vinylprridine) onto the melamine sponge has been confirmed. When contacting with different pH water droplets in air, the as-prepared product shows excellent switchable wettability between super- hydrophilicity (0 degrees.) and highly hydrophobicity (135 degrees.). Meanwhile, this responsive sponge also exhibits super- hydrophilic/oleophobic property underwater at pH = 1.0, and highly hydrophobic/super-oleophilic property in neutral solution at pH = 7.0. Furthermore, the excellent responsiveness is remained after five cycle water contact angle tests between two different pH stages at pH 1.0 and 7.0. The modified melamine sponges could not only absorb the oil from the oily water at pH = 7.0, but also quickly release the absorbed oil underwater at pH = 1.0 without leaving any residues and hurting the environment nearly, showing a good potential in controlled oil/water separation and oil recovery. (C) 2017 Elsevier B.V. All rights reserved.

Melamine sponge 4-Vinylpryidine pH-responsive Oil recovery

SCI ; EI

英语

通讯

Natural Science Foundation of Guangdong Province[2016A030311031]

Chemistry ; Materials Science ; Physics

Chemistry, Physical ; Materials Science, Coatings & Films ; Physics, Applied ; Physics, Condensed Matter

WOS:000402461900095

ELSEVIER SCIENCE BV

20171903650855

Atom transfer radical polymerization ; Free radical reactions ; Grafting (chemical) ; Hydrophilicity ; Hydrophobicity ; Oil well flooding ; Scanning electron microscopy ; Surface treatment

Oil Field Production Operations:511.1 ; Chemical Reactions:802.2 ; Polymerization:815.2 ; Physical Properties of Gases, Liquids and Solids:931.2

MATERIALS SCIENCE

Web of Science

1.South China Univ Technol, Res Inst Mat Sci, Guangzhou 510640, Peoples R China
2.South Univ Sci & Technol China, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China

Lei, Zhiwen,Zhang, Guangzhao,Deng, Yonghong,et al. Surface modification of melamine sponges for pH-responsive oil absorption and desorption[J]. APPLIED SURFACE SCIENCE,2017,416:798-804.

Lei, Zhiwen,Zhang, Guangzhao,Deng, Yonghong,&Wang, Chaoyang.(2017).Surface modification of melamine sponges for pH-responsive oil absorption and desorption.APPLIED SURFACE SCIENCE,416,798-804.

Lei, Zhiwen,et al."Surface modification of melamine sponges for pH-responsive oil absorption and desorption".APPLIED SURFACE SCIENCE 416(2017):798-804.