The nanocellulose biorefinery: woody versus herbaceous agricultural wastes for NCC production
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- 作者：Araceli García ; Jalel Labidi ; Mohamed Naceur Belgacem ; Julien Bras
- 关键词：Cellulose nanocrystals ; Organosolv ; Crystallinity ; Surface charge ; Allomorphism ; Lignocellulosic biomass
- 刊名：Cellulose
- 出版年：2017
- 出版时间：February 2017
- 年：2017
- 卷：24
- 期：2
- 页码：693-704
- 全文大小：
- 刊物类别：Chemistry and Materials Science
- 刊物主题：Bioorganic Chemistry; Physical Chemistry; Organic Chemistry; Polymer Sciences;
- 出版者：Springer Netherlands
- ISSN：1572-882X
- 卷排序：24
文摘
In the present work two agricultural residues (apple tree pruning and pea stalks) were studied as sources of nanocellulose. Different pretreatments that might be used in a biorefinery were applied to these lignocellulosic materials: autohydrolysis, organosolv (acetosolv) and alkaline pretreatments. After conventional bleaching, the resulting cellulosic fractions were submitted to a classical acid hydrolysis for nanocellulose crystal (NCC) production. The results showed that after applying different pretreatments, the resulting NCCs had different lengths (from 300 to 676 nm), surface charges (from 17 to 98 μmol acid groups/g NCC), purity (from 0.3 to 11.6% w/w of inorganics), crystallinity indexes and even allomorphism. These results highlighted the importance that cellulose source and particularly the applied pretreatments have on nanocrystal properties and suggest how biorefining pathways for lignocellulosic materials could customize such NCC features as surface reactivity or suitability for chemical modification.