Please use this identifier to cite or link to this item:
https://hdl.handle.net/10316/106586
DC Field | Value | Language |
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dc.contributor.author | Yang, Jiayi | - |
dc.contributor.author | Medronho, Bruno | - |
dc.contributor.author | Lindman, Björn Olof | - |
dc.contributor.author | Norgren, Magnus | - |
dc.date.accessioned | 2023-04-12T08:28:35Z | - |
dc.date.available | 2023-04-12T08:28:35Z | - |
dc.date.issued | 2020-02-07 | - |
dc.identifier.issn | 2073-4360 | pt |
dc.identifier.uri | https://hdl.handle.net/10316/106586 | - |
dc.description.abstract | In this work, non-derivatized cellulose pulp was dissolved in a cold alkali solution (LiOH/urea) and chemically cross-linked with methylenebisacrylamide (MBA) to form a robust hydrogel with superior water absorption properties. Different cellulose concentrations (i.e., 2, 3 and 4 wt%) and MBA/glucose molar ratios (i.e., 0.26, 0.53 and 1.05) were tested. The cellulose hydrogel cured at 60 °C for 30 min, with a MBA/glucose molar ratio of 1.05, exhibited the highest water swelling capacity absorbing ca. 220 g H2O/g dry hydrogel. Moreover, the data suggest that the cross-linking occurs via a basic Michael addition mechanism. This innovative procedure based on the direct dissolution of unmodified cellulose in LiOH/urea followed by MBA cross-linking provides a simple and fast approach to prepare chemically cross-linked non-derivatized high-molecular-weight cellulose hydrogels with superior water uptake capacity. | pt |
dc.language.iso | eng | pt |
dc.publisher | MDPI | pt |
dc.relation | FORMAS, grant number 942-2015-251 | pt |
dc.relation | PTDC/AGR-TEC/4814/2014 | pt |
dc.relation | PTDC/ASP-SIL/30619/2017 | pt |
dc.relation | UIDB/05183/2020 | pt |
dc.rights | openAccess | pt |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | pt |
dc.subject | LiOH/urea | pt |
dc.subject | Michael addition | pt |
dc.subject | methylenebisacrylamide | pt |
dc.subject | cellulose hydrogel | pt |
dc.title | Simple One Pot Preparation of Chemical Hydrogels from Cellulose Dissolved in Cold LiOH/Urea | pt |
dc.type | article | - |
degois.publication.firstPage | 373 | pt |
degois.publication.issue | 2 | pt |
degois.publication.title | Polymers | pt |
dc.peerreviewed | yes | pt |
dc.identifier.doi | 10.3390/polym12020373 | pt |
degois.publication.volume | 12 | pt |
dc.date.embargo | 2020-02-07 | * |
uc.date.periodoEmbargo | 0 | pt |
item.grantfulltext | open | - |
item.cerifentitytype | Publications | - |
item.languageiso639-1 | en | - |
item.openairetype | article | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | Com Texto completo | - |
crisitem.author.researchunit | CQC - Coimbra Chemistry Centre | - |
crisitem.author.parentresearchunit | Faculty of Sciences and Technology | - |
crisitem.author.orcid | 0000-0003-0972-1739 | - |
crisitem.author.orcid | 0000-0002-7493-9112 | - |
Appears in Collections: | FCTUC Química - Artigos em Revistas Internacionais |
Files in This Item:
File | Description | Size | Format | |
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Simple-one-pot-preparation-of-chemical-hydrogels-from-cellulose-dissolved-in-cold-LiOHUreaPolymers.pdf | 3.09 MB | Adobe PDF | View/Open |
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This item is licensed under a Creative Commons License