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Polymer/reduced graphene oxide functionalized sponges as superabsorbents for oil removal and recovery.
Mar Pollut Bull ; 114(2): 888-895, 2017 Jan 30.
Artigo em Inglês | MEDLINE | ID: mdl-27863883
ABSTRACT
Polyurethane dish-washing (PU-DW) sponges are functionalized sequentially with polyethylenimine (PEI) and graphene oxide (GO) to form PEI/reduced graphene oxide (RGO) PU-DW sponges. The PEI/RGO PU-DW sponge consists of PEI/RGO sheets having numerous pores, with diameters ranging from 236 to 254nm. To further enhance hydrophobicity and absorption capacity of oil, PEI/RGO PU-DW sponge is further coated with 20% phenyltrimethoxysilane (PTMOS). The PTMOS/PEI/RGO PU-DW sponge absorbs various oils within 20s, with maximum absorption capacity values of 880% and 840% for bicycle chain oil and motorcycle engine oil, respectively. The absorbed oils were released completely by squeezing or immersed in hexane. The PTMOS/PEI/RGO PU-DW sponge efficiently separates oil/water mixtures through a flowing system. Having the advantages of faster absorption rate, reusability, and low cost, the PTMOS/PEI/RGO PU-DW sponge holds great potential as a superabsorbent for efficient removal and recovery of oil spills as well as for the separation of oil/water mixtures.
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Texto completo: Disponível Coleções: Bases de dados internacionais Base de dados: MEDLINE Assunto principal: Poliuretanos / Poluentes Químicos da Água / Óleos Combustíveis / Poluição por Petróleo / Purificação da Água / Grafite Idioma: Inglês Revista: Mar Pollut Bull Ano de publicação: 2017 Tipo de documento: Artigo País de afiliação: Taiwan