A robust bilayer nanofilm fabricated on copper foam for oil-water separation with improved performances

ISL OpenIR > 青海盐湖研究所知识仓储

	A robust bilayer nanofilm fabricated on copper foam for oil-water separation with improved performances
	Wang, Yabin 1,2; Lin, Feng 1; Peng, Jiaoyu 1; Dong, Yaping1 ; Li, Wu1 ; Huang, Yudong 2
	2016
发表期刊	JOURNAL OF MATERIALS CHEMISTRY A
卷号	4 期号:26 页码:10294-10303
摘要	In this work, a facile approach of covalent layer-by-layer assembly was applied to fabricate a bilayer nanofilm which renders roughened copper foam superhydrophobic with robust performances. Before constructing the bilayer nanofilm, the surface of the foam was roughened by using KOH-K2S2O8 as the oxidation system, giving rise to hierarchical structures of flower-like protrusions and petals. A multifunctional polymeric nanofilm, capable of resisting copper corrosion and serving as an activated interface simultaneously, was first introduced onto the copper surface by heating self-assembled monolayers (SAMs) of one triazinedithiolsilane compound (designated as TESPA). Then, perfluorodecyltrichlorosilane (abbreviated as PFDTCS) was anchored onto the TESPA-modified copper surface. Consequently, a bilayer nanofilm of PFDTCS-TESPA is generated on the hierarchical foam that possesses outstanding superhydrophobic capability. The as-prepared foam exhibits excellent reusability and separation efficiency. After fifty recycles, the separation efficiency exceeds 98% while the surface still retains remarkable superhydrophobicity. The improved efficiency and recycle number are outstanding compared to those of similar systems reported previously. X-ray photoelectron spectroscopy (XPS) was conducted to reveal the mechanism of the robust performances of the bilayer-coated foam. The results show that TESPA can react with copper oxide (CuO) through SH groups yielding TESPA SAM. Upon heating, the newly formed disulfide units (-SS-) and siloxane networks (SiOSi) of the TESPA polymeric nanofilm protect the copper; the outward silanol groups (SiOH) endow the surface with activating ability. PFDTCS can covalently bond to the TESPA polymeric nanofilm via these SiOH groups. The specific arrangement of PFDTCS-TESPA and the chemical bonds of Cu(I) S, as well as the three-dimensional (3D) cross-linked textures of -SS-units and SiOSi networks, cooperatively enhance the chemical durability of the bilayer. The design strategy of preparing the bilayer nanofilm via an interlayer (e.g., TESPA as a molecular adhesive displayed in this work) can also be applied in other superhydrophobic systems for improved long-term utilization.
语种	英语
引用统计
文献类型	期刊论文
条目标识符	http://ir.isl.ac.cn/handle/363002/6329
专题	青海盐湖研究所知识仓储盐湖资源综合利用工程技术中心
作者单位	1.Chinese Acad Sci, Key Lab Comprehens & Highly Efficient Utilizat Sa, Qinghai Inst Salt Lakes, Xining 810008, Peoples R China 2.Harbin Inst Technol, Sch Chem Engn & Technol, Harbin 150001, Peoples R China
推荐引用方式 GB/T 7714	Wang, Yabin,Lin, Feng,Peng, Jiaoyu,et al. A robust bilayer nanofilm fabricated on copper foam for oil-water separation with improved performances[J]. JOURNAL OF MATERIALS CHEMISTRY A,2016,4(26):10294-10303.
APA	Wang, Yabin,Lin, Feng,Peng, Jiaoyu,Dong, Yaping,Li, Wu,&Huang, Yudong.(2016).A robust bilayer nanofilm fabricated on copper foam for oil-water separation with improved performances.JOURNAL OF MATERIALS CHEMISTRY A,4(26),10294-10303.
MLA	Wang, Yabin,et al."A robust bilayer nanofilm fabricated on copper foam for oil-water separation with improved performances".JOURNAL OF MATERIALS CHEMISTRY A 4.26(2016):10294-10303.