Preparation of Self-supporting Bagasse Cellulose Nanofibrils Hydrogels Induced by Zinc Ions
Cellulose hydrogels are often prepared from native cellulose through a direct cellulose dissolution approach that often involves tedious process and solvent recovery problems. A self-supporting cellulose hydrogel was prepared by gelation of the TEMPO-oxidized bagasse cellulose nanofibrils (CNF) trig...
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doaj-33526c881f3f4de4a3ef14fee3ec147c2020-11-25T02:29:16ZengMDPI AGNanomaterials2079-49912018-10-0181080010.3390/nano8100800nano8100800Preparation of Self-supporting Bagasse Cellulose Nanofibrils Hydrogels Induced by Zinc IonsPeng Lu0Ren Liu1Xin Liu2Min Wu3Institute of Light Industry and Food Engineering, Guangxi Key Laboratory of Clean Pulp and Papermaking and Pollution Control, Guangxi University, Nanning 530004, ChinaInstitute of Light Industry and Food Engineering, Guangxi Key Laboratory of Clean Pulp and Papermaking and Pollution Control, Guangxi University, Nanning 530004, ChinaInstitute of Light Industry and Food Engineering, Guangxi Key Laboratory of Clean Pulp and Papermaking and Pollution Control, Guangxi University, Nanning 530004, ChinaInstitute of Light Industry and Food Engineering, Guangxi Key Laboratory of Clean Pulp and Papermaking and Pollution Control, Guangxi University, Nanning 530004, ChinaCellulose hydrogels are often prepared from native cellulose through a direct cellulose dissolution approach that often involves tedious process and solvent recovery problems. A self-supporting cellulose hydrogel was prepared by gelation of the TEMPO-oxidized bagasse cellulose nanofibrils (CNF) triggered by strong crosslinking between carboxylate groups and Zn2+. TEMPO process was used to generate negatively charged carboxylate groups on CNF surface to provide a high binding capability to Zn2+. Three TEMPO-oxidized CNFs of different carboxylate contents were prepared and characterized. TEM and AFM microscopes suggested that the sizes of CNFs were fined down and carboxylated cellulose nanofibrils (TOCNFs) of 5–10 nm wide, 200–500 nm long, and carboxylate contents 0.73–1.29 mmol/g were obtained. The final structures and compressive strength of hydrogels were primarily influenced by interfibril Zn2+-carboxylate interactions, following the order of TOCNFs concentration > content of carboxylate groups > concentration of zinc ions. A CO2 sensitive self-supporting cellulose hydrogel was developed as a colorimetric indicator of food spoilage for intelligent food packaging applications.http://www.mdpi.com/2079-4991/8/10/800hydrogelcellulose nanofibrilszinc ionsionic cross-linkingbagasse cellulose fiber |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Peng Lu Ren Liu Xin Liu Min Wu |
spellingShingle |
Peng Lu Ren Liu Xin Liu Min Wu Preparation of Self-supporting Bagasse Cellulose Nanofibrils Hydrogels Induced by Zinc Ions Nanomaterials hydrogel cellulose nanofibrils zinc ions ionic cross-linking bagasse cellulose fiber |
author_facet |
Peng Lu Ren Liu Xin Liu Min Wu |
author_sort |
Peng Lu |
title |
Preparation of Self-supporting Bagasse Cellulose Nanofibrils Hydrogels Induced by Zinc Ions |
title_short |
Preparation of Self-supporting Bagasse Cellulose Nanofibrils Hydrogels Induced by Zinc Ions |
title_full |
Preparation of Self-supporting Bagasse Cellulose Nanofibrils Hydrogels Induced by Zinc Ions |
title_fullStr |
Preparation of Self-supporting Bagasse Cellulose Nanofibrils Hydrogels Induced by Zinc Ions |
title_full_unstemmed |
Preparation of Self-supporting Bagasse Cellulose Nanofibrils Hydrogels Induced by Zinc Ions |
title_sort |
preparation of self-supporting bagasse cellulose nanofibrils hydrogels induced by zinc ions |
publisher |
MDPI AG |
series |
Nanomaterials |
issn |
2079-4991 |
publishDate |
2018-10-01 |
description |
Cellulose hydrogels are often prepared from native cellulose through a direct cellulose dissolution approach that often involves tedious process and solvent recovery problems. A self-supporting cellulose hydrogel was prepared by gelation of the TEMPO-oxidized bagasse cellulose nanofibrils (CNF) triggered by strong crosslinking between carboxylate groups and Zn2+. TEMPO process was used to generate negatively charged carboxylate groups on CNF surface to provide a high binding capability to Zn2+. Three TEMPO-oxidized CNFs of different carboxylate contents were prepared and characterized. TEM and AFM microscopes suggested that the sizes of CNFs were fined down and carboxylated cellulose nanofibrils (TOCNFs) of 5–10 nm wide, 200–500 nm long, and carboxylate contents 0.73–1.29 mmol/g were obtained. The final structures and compressive strength of hydrogels were primarily influenced by interfibril Zn2+-carboxylate interactions, following the order of TOCNFs concentration > content of carboxylate groups > concentration of zinc ions. A CO2 sensitive self-supporting cellulose hydrogel was developed as a colorimetric indicator of food spoilage for intelligent food packaging applications. |
topic |
hydrogel cellulose nanofibrils zinc ions ionic cross-linking bagasse cellulose fiber |
url |
http://www.mdpi.com/2079-4991/8/10/800 |
work_keys_str_mv |
AT penglu preparationofselfsupportingbagassecellulosenanofibrilshydrogelsinducedbyzincions AT renliu preparationofselfsupportingbagassecellulosenanofibrilshydrogelsinducedbyzincions AT xinliu preparationofselfsupportingbagassecellulosenanofibrilshydrogelsinducedbyzincions AT minwu preparationofselfsupportingbagassecellulosenanofibrilshydrogelsinducedbyzincions |
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1724834099437240320 |