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Approaches for Extracting Nanofibrillated Cellulose from Oat Bran and Its Emulsion Capacity and Stability

Polymers, 2022-01, Vol.14 (2), p.327 [Peer Reviewed Journal]

2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License. ;2022 by the authors. 2022 ;ISSN: 2073-4360 ;EISSN: 2073-4360 ;DOI: 10.3390/polym14020327 ;PMID: 35054733

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Title:
Approaches for Extracting Nanofibrillated Cellulose from Oat Bran and Its Emulsion Capacity and Stability
Author: Mitbumrung, Wiphada ; Rungraung, Numphung ; Muangpracha, Niramol ; Akanitkul, Ploypailin ; Winuprasith, Thunnalin
Subjects: Biocompatibility ; Bleaches ; Bleaching ; Cellulose ; chemical pretreatment ; Contact angle ; Dietary fiber ; Disintegration ; Droplets ; Emulsions ; Energy consumption ; Homogenization ; Hydrochloric acid ; Hydrogen bonds ; hydrothermal pretreatment ; Lignin ; Lignocellulose ; Loss modulus ; Nanofibers ; nanofibrillated cellulose (NFC) ; oat bran ; Potash ; Potassium ; Pretreatment ; Production costs ; Size reduction ; Stability ; Storage modulus ; Viscosity
Is Part Of: Polymers, 2022-01, Vol.14 (2), p.327
Description: The pretreatment process is an essential step for nanofibrillated cellulose production as it enhances size reduction efficiency, reduces production cost, and decreases energy consumption. In this study, nanofibrillated cellulose (NFC) was prepared using various pretreatment processes, either chemical (i.e., acid, basic, and bleach) or hydrothermal (i.e., microwave and autoclave), followed by disintegration using high pressure homogenization from oat bran fibers. The obtained NFC were used as an emulsifier to prepare 10% oil-in-water emulsions. The emulsion containing chemically pretreated NFC exhibited the smallest oil droplet diameter ( ) at 3.76 μm, while those containing NFC using other pretreatments exhibited values > 5 μm. The colors of the emulsions were mainly influenced by oil droplet size rather than the color of the fiber itself. Both NFC suspensions and NFC emulsions showed a storage modulus ( ') higher than the loss modulus ( ″) without crossing over, indicating gel-like behavior. For emulsion stability, microwave pretreatment effectively minimized gravitational separation, and the creaming indices of all NFC-emulsions were lower than 6% for the entire storage period. In conclusion, chemical pretreatment was an effective method for nanofiber extraction with good emulsion capacity. However, the microwave with bleaching pretreatment was an alternative method for extracting nanofibers and needs further study to improve the efficiency.
Publisher: Switzerland: MDPI AG
Language: English
Identifier: ISSN: 2073-4360
EISSN: 2073-4360
DOI: 10.3390/polym14020327
PMID: 35054733
Source: Open Access: PubMed Central
AUTh Library subscriptions: ProQuest Central
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Approaches for Extracting Nanofibrillated Cellulose from Oat Bran and Its Emulsion Capacity and Stability

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