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SEM Observation of Hydrous Superabsorbent Polymer Pretreated with Room-Temperature Ionic Liquids

Room-temperature ionic liquid (RTIL), which is a liquid salt at or below room temperature, shows peculiar physicochemical properties such as negligible vapor pressure and relatively-high ionic conductivity. In this investigation, we used six types of RTILs as a liquid material in the pretreatment pr...

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Autores principales: Tsuda, Tetsuya, Mochizuki, Eiko, Kishida, Shoko, Iwasaki, Kazuki, Tsunashima, Katsuhiko, Kuwabata, Susumu
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2014
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3951289/
https://www.ncbi.nlm.nih.gov/pubmed/24621609
http://dx.doi.org/10.1371/journal.pone.0091193
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author Tsuda, Tetsuya
Mochizuki, Eiko
Kishida, Shoko
Iwasaki, Kazuki
Tsunashima, Katsuhiko
Kuwabata, Susumu
author_facet Tsuda, Tetsuya
Mochizuki, Eiko
Kishida, Shoko
Iwasaki, Kazuki
Tsunashima, Katsuhiko
Kuwabata, Susumu
author_sort Tsuda, Tetsuya
collection PubMed
description Room-temperature ionic liquid (RTIL), which is a liquid salt at or below room temperature, shows peculiar physicochemical properties such as negligible vapor pressure and relatively-high ionic conductivity. In this investigation, we used six types of RTILs as a liquid material in the pretreatment process for scanning electron microscope (SEM) observation of hydrous superabsorbent polymer (SAP) particles. Very clear SEM images of the hydrous SAP particles were obtained if the neat RTILs were used for the pretreatment process. Of them, tri-n-butylmethylphosphonium dimethylphosphate ([P(4, 4, 4, 1)][DMP]) provided the best result. On the other hand, the surface morphology of the hydrous SAP particles pretreated with 1-ethyl-3-methylimidazolium tetrafluoroborate ([C(2)mim][BF(4)]) and 1-butyl-3-methylimidazolium tetrafluoroborate ([C(4)mim][BF(4)]) was damaged. The results of SEM observation and thermogravimetry analysis of the hydrous SAP pretreated with the RTILs strongly suggested that most water in the SAP particles are replaced with RTIL during the pretreatment process.
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spelling pubmed-39512892014-03-13 SEM Observation of Hydrous Superabsorbent Polymer Pretreated with Room-Temperature Ionic Liquids Tsuda, Tetsuya Mochizuki, Eiko Kishida, Shoko Iwasaki, Kazuki Tsunashima, Katsuhiko Kuwabata, Susumu PLoS One Research Article Room-temperature ionic liquid (RTIL), which is a liquid salt at or below room temperature, shows peculiar physicochemical properties such as negligible vapor pressure and relatively-high ionic conductivity. In this investigation, we used six types of RTILs as a liquid material in the pretreatment process for scanning electron microscope (SEM) observation of hydrous superabsorbent polymer (SAP) particles. Very clear SEM images of the hydrous SAP particles were obtained if the neat RTILs were used for the pretreatment process. Of them, tri-n-butylmethylphosphonium dimethylphosphate ([P(4, 4, 4, 1)][DMP]) provided the best result. On the other hand, the surface morphology of the hydrous SAP particles pretreated with 1-ethyl-3-methylimidazolium tetrafluoroborate ([C(2)mim][BF(4)]) and 1-butyl-3-methylimidazolium tetrafluoroborate ([C(4)mim][BF(4)]) was damaged. The results of SEM observation and thermogravimetry analysis of the hydrous SAP pretreated with the RTILs strongly suggested that most water in the SAP particles are replaced with RTIL during the pretreatment process. Public Library of Science 2014-03-12 /pmc/articles/PMC3951289/ /pubmed/24621609 http://dx.doi.org/10.1371/journal.pone.0091193 Text en © 2014 Tsuda et al http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.
spellingShingle Research Article
Tsuda, Tetsuya
Mochizuki, Eiko
Kishida, Shoko
Iwasaki, Kazuki
Tsunashima, Katsuhiko
Kuwabata, Susumu
SEM Observation of Hydrous Superabsorbent Polymer Pretreated with Room-Temperature Ionic Liquids
title SEM Observation of Hydrous Superabsorbent Polymer Pretreated with Room-Temperature Ionic Liquids
title_full SEM Observation of Hydrous Superabsorbent Polymer Pretreated with Room-Temperature Ionic Liquids
title_fullStr SEM Observation of Hydrous Superabsorbent Polymer Pretreated with Room-Temperature Ionic Liquids
title_full_unstemmed SEM Observation of Hydrous Superabsorbent Polymer Pretreated with Room-Temperature Ionic Liquids
title_short SEM Observation of Hydrous Superabsorbent Polymer Pretreated with Room-Temperature Ionic Liquids
title_sort sem observation of hydrous superabsorbent polymer pretreated with room-temperature ionic liquids
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3951289/
https://www.ncbi.nlm.nih.gov/pubmed/24621609
http://dx.doi.org/10.1371/journal.pone.0091193
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