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Valorization of Byproducts of Hemp Multipurpose Crop: Short Non-Aligned Bast Fibers as a Source of Nanocellulose

Molecules (Basel, Switzerland), 2021-08, Vol.26 (16), p.4723 [Tạp chí có phản biện]

2021 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. ;Distributed under a Creative Commons Attribution 4.0 International License ;2021 by the authors. 2021 ;ISSN: 1420-3049 ;EISSN: 1420-3049 ;DOI: 10.3390/molecules26164723 ;PMID: 34443315

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Nhan đề:
Valorization of Byproducts of Hemp Multipurpose Crop: Short Non-Aligned Bast Fibers as a Source of Nanocellulose
Tác giả: Dalle Vacche, Sara ; Karunakaran, Vijayaletchumy ; Patrucco, Alessia ; Zoccola, Marina ; Douard, Loreleï ; Ronchetti, Silvia ; Gallo, Marta ; Schreier, Aigoul ; Leterrier, Yves ; Bras, Julien ; Beneventi, Davide ; Bongiovanni, Roberta
Chủ đề: Bleaching ; Cannabis ; Cellulase ; Cellulose ; Chemical Sciences ; Chlorine ; Color vision ; Engineering Sciences ; Enzymes ; Fibers ; Hemp ; Hydrochloric acid ; Infrared analysis ; Infrared spectroscopy ; Lignin ; lignocellulosic fibers ; Morphology ; nanocellulose ; nanopaper ; Sodium ; Sodium hydroxide ; Textiles ; Thermogravimetric analysis ; Ultrafines ; Vegetable fibers ; waste valorization ; Wood pulp ; X-ray diffraction
Là 1 phần của: Molecules (Basel, Switzerland), 2021-08, Vol.26 (16), p.4723
Mô tả: Nanocellulose was extracted from short bast fibers, from hemp (Cannabis sativa L.) plants harvested at seed maturity, non-retted, and mechanically decorticated in a defibering apparatus, giving non-aligned fibers. A chemical pretreatment with NaOH and HCl allowed the removal of most of the non-cellulosic components of the fibers. No bleaching was performed. The chemically pretreated fibers were then refined in a beater and treated with a cellulase enzyme, followed by mechanical defibrillation in an ultrafine friction grinder. The fibers were characterized by microscopy, infrared spectroscopy, thermogravimetric analysis and X-ray diffraction after each step of the process to understand the evolution of their morphology and composition. The obtained nanocellulose suspension was composed of short nanofibrils with widths of 5–12 nm, stacks of nanofibrils with widths of 20–200 nm, and some larger fibers. The crystallinity index was found to increase from 74% for the raw fibers to 80% for the nanocellulose. The nanocellulose retained a yellowish color, indicating the presence of some residual lignin. The properties of the nanopaper prepared with the hemp nanocellulose were similar to those of nanopapers prepared with wood pulp-derived rod-like nanofibrils.
Nơi xuất bản: Basel: MDPI AG
Ngôn ngữ: English
Số nhận dạng: ISSN: 1420-3049
EISSN: 1420-3049
DOI: 10.3390/molecules26164723
PMID: 34443315
Nguồn: Geneva Foundation Free Medical Journals at publisher websites
Hyper Article en Ligne (HAL) (Open Access)
PubMed Central
Alma/SFX Local Collection
ProQuest Central
DOAJ Directory of Open Access Journals

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Valorization of Byproducts of Hemp Multipurpose Crop: Short Non-Aligned Bast Fibers as a Source of Nanocellulose

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