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Tension gradient self-assembly to facilely fabricate polytetrafluoroethylene coatings for oil–water separation

Published online by Cambridge University Press:  23 May 2019

Dong Feng Open the ORCID record for Dong Feng [Opens in a new window] ,
Ding Weng ,
Chaolang Chen  and
Jiadao Wang
Dong Feng
Affiliation:
State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, P.R. China
Ding Weng
Affiliation:
State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, P.R. China
Chaolang Chen
Affiliation:
State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, P.R. China
Jiadao Wang*
Affiliation:
State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, P.R. China
*
Address all correspondence to Jiadao Wang at jdwang@mail.tsinghua.edu.cn
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Abstract

A facile and low-cost method based for tension gradient self-assembly was developed to prepare polytetrafluoroethylene (PTFE) nanofiber coatings on stainless-steel fiber felts. The PTFE particles were used as building blocks and the self-assembly process was analyzed thoroughly. After being sintered, the PTFE particles were transformed into PTFE nanofibers. The felts coated with the PTFE nanofibers exhibited superhydrophobicity and superoleophilicity, and could separate a series of oil–water mixtures with high efficiency and good reusability. The coated felts also presented excellent chemical and thermal stabilities. Over all, this approach could easily fabricate ultra-robust oil–water separation materials suitable for industrial applications.

Type
Research Letters
Information
MRS Communications , Volume 9 , Issue 2 , June 2019 , pp. 690 - 696
Copyright
Copyright © Materials Research Society 2019 

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