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Fabrication of porous polymer coating layers with selective wettability on filter papers via the breath figure method and their applications in oil/water separation

A comb-like amphiphilic polymer (PBTF), composed of hydrophobic backbones and hydrophilic side chains, was employed to grow honeycomb coating layers in situ on a filter paper via directly casting a polymer solution and by the subsequent dynamic breath figure (BF) method. Through regulating the hydro...

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Autores principales: Zhang, Xu, Sun, Guangping, Liu, Heng, Zhang, Xuequan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8697688/
https://www.ncbi.nlm.nih.gov/pubmed/35423976
http://dx.doi.org/10.1039/d1ra01080h
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author Zhang, Xu
Sun, Guangping
Liu, Heng
Zhang, Xuequan
author_facet Zhang, Xu
Sun, Guangping
Liu, Heng
Zhang, Xuequan
author_sort Zhang, Xu
collection PubMed
description A comb-like amphiphilic polymer (PBTF), composed of hydrophobic backbones and hydrophilic side chains, was employed to grow honeycomb coating layers in situ on a filter paper via directly casting a polymer solution and by the subsequent dynamic breath figure (BF) method. Through regulating the hydrophilic polymer side chain density and the solution concentration, a continuous honeycomb coating layer contouring to the filter paper surface profile, in addition to possessing a water contact angle (WCA) as high as 146°, was successfully fabricated. The present study also finds that increasing the hydrophilic side chain density will turn PBTF into a surfactant-like polymer, and thus, endow the PBTF solution with the capacity of numerous micro–nano-sized water droplets, rather than simply stabilizing the ordered water droplet arrays on the surface of the solution. With vast nano-sized water droplets in it, the once transparent PBTF solution changed into a translucent nano-emulsion, which demonstrates a strong Tyndall effect. While casting such nano-emulsion on a filter paper and then subjecting to the BF process, the polymeric solute takes both nano-emulsion intrinsic nano-sized water droplets and solvent evaporation-induced water droplets as templates and self-assembles into a bird-nest-like three-dimensional porous microstructure, which possesses micro–nano-sized communicating pores. By regulating the water content in the nano-emulsion, the bird-nest-like structure can be uniformly formed on the surface of the filter paper, which revealed a WCA of 152°. The coated filter papers possess selective wettability, and meanwhile, maintain the inherent permeability of the substrates, which therefore can be directly utilized as oil/water separation materials.
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spelling pubmed-86976882022-04-13 Fabrication of porous polymer coating layers with selective wettability on filter papers via the breath figure method and their applications in oil/water separation Zhang, Xu Sun, Guangping Liu, Heng Zhang, Xuequan RSC Adv Chemistry A comb-like amphiphilic polymer (PBTF), composed of hydrophobic backbones and hydrophilic side chains, was employed to grow honeycomb coating layers in situ on a filter paper via directly casting a polymer solution and by the subsequent dynamic breath figure (BF) method. Through regulating the hydrophilic polymer side chain density and the solution concentration, a continuous honeycomb coating layer contouring to the filter paper surface profile, in addition to possessing a water contact angle (WCA) as high as 146°, was successfully fabricated. The present study also finds that increasing the hydrophilic side chain density will turn PBTF into a surfactant-like polymer, and thus, endow the PBTF solution with the capacity of numerous micro–nano-sized water droplets, rather than simply stabilizing the ordered water droplet arrays on the surface of the solution. With vast nano-sized water droplets in it, the once transparent PBTF solution changed into a translucent nano-emulsion, which demonstrates a strong Tyndall effect. While casting such nano-emulsion on a filter paper and then subjecting to the BF process, the polymeric solute takes both nano-emulsion intrinsic nano-sized water droplets and solvent evaporation-induced water droplets as templates and self-assembles into a bird-nest-like three-dimensional porous microstructure, which possesses micro–nano-sized communicating pores. By regulating the water content in the nano-emulsion, the bird-nest-like structure can be uniformly formed on the surface of the filter paper, which revealed a WCA of 152°. The coated filter papers possess selective wettability, and meanwhile, maintain the inherent permeability of the substrates, which therefore can be directly utilized as oil/water separation materials. The Royal Society of Chemistry 2021-04-15 /pmc/articles/PMC8697688/ /pubmed/35423976 http://dx.doi.org/10.1039/d1ra01080h Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/
spellingShingle Chemistry
Zhang, Xu
Sun, Guangping
Liu, Heng
Zhang, Xuequan
Fabrication of porous polymer coating layers with selective wettability on filter papers via the breath figure method and their applications in oil/water separation
title Fabrication of porous polymer coating layers with selective wettability on filter papers via the breath figure method and their applications in oil/water separation
title_full Fabrication of porous polymer coating layers with selective wettability on filter papers via the breath figure method and their applications in oil/water separation
title_fullStr Fabrication of porous polymer coating layers with selective wettability on filter papers via the breath figure method and their applications in oil/water separation
title_full_unstemmed Fabrication of porous polymer coating layers with selective wettability on filter papers via the breath figure method and their applications in oil/water separation
title_short Fabrication of porous polymer coating layers with selective wettability on filter papers via the breath figure method and their applications in oil/water separation
title_sort fabrication of porous polymer coating layers with selective wettability on filter papers via the breath figure method and their applications in oil/water separation
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8697688/
https://www.ncbi.nlm.nih.gov/pubmed/35423976
http://dx.doi.org/10.1039/d1ra01080h
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