Physical, Rheological and Mechanical Properties of Alkali Activated Hydrogels Based on Nanofibrillated Cellulose
Hydrogels are classified as a three-dimensional network system, capable of retaining large amounts of water while preserving their shape and dimensional stability. Due to their natural origin and biocompatibility with human tissue, cellulose nanofibrils are often considered to be promising candidate...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2022-12-01
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| Series: | Journal of Natural Fibers |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1080/15440478.2022.2123879 |
| _version_ | 1827807894968467456 |
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| author | Vesna Žepič Primož Oven Matjaž Čop Viljem Vek Biljana Janković Ida Poljanšek |
| author_facet | Vesna Žepič Primož Oven Matjaž Čop Viljem Vek Biljana Janković Ida Poljanšek |
| author_sort | Vesna Žepič |
| collection | DOAJ |
| description | Hydrogels are classified as a three-dimensional network system, capable of retaining large amounts of water while preserving their shape and dimensional stability. Due to their natural origin and biocompatibility with human tissue, cellulose nanofibrils are often considered to be promising candidates for bioactive hydrogels preparation. For such applications, their responsiveness under different types of mechanical load, including multiple cyclic compressions, is of crucial importance. In the present study, cellulose nanofibril-based hydrogels were initiated though a simple alkali neutralization treatment. Structural, rheological and compressive features were investigated as a function of elevated NaOH concentration and physical gelling conditions. It was found that a sufficiently concentrated alkaline solution allows the formation of mechanically robust cellulose nanofibril hydrogels, which can be dried to the state of ultralight material, aerogel, of low density (0.057 g cm −3), superior porosity (96.2%), super water absorbant capacity (1200%), and exceptional shear and compressive load resilience with elasticity modulus of 9.3 kPa. These outstanding characteristics can be predominantly attributed to the polymorphic conversion of cellulose I to cellulose II, which results from the mercerization of cellulose nanofibrils and creates a stable and firm hydrogels texture. |
| first_indexed | 2024-03-11T22:03:24Z |
| format | Article |
| id | doaj.art-2053e4a94cda47828af9feb51786aee8 |
| institution | Directory Open Access Journal |
| issn | 1544-0478 1544-046X |
| language | English |
| last_indexed | 2024-03-11T22:03:24Z |
| publishDate | 2022-12-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Journal of Natural Fibers |
| spelling | doaj.art-2053e4a94cda47828af9feb51786aee82023-09-25T10:28:56ZengTaylor & Francis GroupJournal of Natural Fibers1544-04781544-046X2022-12-011917160401605210.1080/15440478.2022.21238792123879Physical, Rheological and Mechanical Properties of Alkali Activated Hydrogels Based on Nanofibrillated CelluloseVesna Žepič0Primož Oven1Matjaž Čop2Viljem Vek3Biljana Janković4Ida Poljanšek5Slovenian Tool and Die Development CentreUniversity of LjubljanaUniversity of LjubljanaUniversity of LjubljanaUniversity of LjubljanaUniversity of LjubljanaHydrogels are classified as a three-dimensional network system, capable of retaining large amounts of water while preserving their shape and dimensional stability. Due to their natural origin and biocompatibility with human tissue, cellulose nanofibrils are often considered to be promising candidates for bioactive hydrogels preparation. For such applications, their responsiveness under different types of mechanical load, including multiple cyclic compressions, is of crucial importance. In the present study, cellulose nanofibril-based hydrogels were initiated though a simple alkali neutralization treatment. Structural, rheological and compressive features were investigated as a function of elevated NaOH concentration and physical gelling conditions. It was found that a sufficiently concentrated alkaline solution allows the formation of mechanically robust cellulose nanofibril hydrogels, which can be dried to the state of ultralight material, aerogel, of low density (0.057 g cm −3), superior porosity (96.2%), super water absorbant capacity (1200%), and exceptional shear and compressive load resilience with elasticity modulus of 9.3 kPa. These outstanding characteristics can be predominantly attributed to the polymorphic conversion of cellulose I to cellulose II, which results from the mercerization of cellulose nanofibrils and creates a stable and firm hydrogels texture.http://dx.doi.org/10.1080/15440478.2022.2123879nanofibrillated cellulosehydrogelmercerizationwater absorptioncompressionshear properties |
| spellingShingle | Vesna Žepič Primož Oven Matjaž Čop Viljem Vek Biljana Janković Ida Poljanšek Physical, Rheological and Mechanical Properties of Alkali Activated Hydrogels Based on Nanofibrillated Cellulose Journal of Natural Fibers nanofibrillated cellulose hydrogel mercerization water absorption compression shear properties |
| title | Physical, Rheological and Mechanical Properties of Alkali Activated Hydrogels Based on Nanofibrillated Cellulose |
| title_full | Physical, Rheological and Mechanical Properties of Alkali Activated Hydrogels Based on Nanofibrillated Cellulose |
| title_fullStr | Physical, Rheological and Mechanical Properties of Alkali Activated Hydrogels Based on Nanofibrillated Cellulose |
| title_full_unstemmed | Physical, Rheological and Mechanical Properties of Alkali Activated Hydrogels Based on Nanofibrillated Cellulose |
| title_short | Physical, Rheological and Mechanical Properties of Alkali Activated Hydrogels Based on Nanofibrillated Cellulose |
| title_sort | physical rheological and mechanical properties of alkali activated hydrogels based on nanofibrillated cellulose |
| topic | nanofibrillated cellulose hydrogel mercerization water absorption compression shear properties |
| url | http://dx.doi.org/10.1080/15440478.2022.2123879 |
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