期刊
CELLULOSE
卷 27, 期 14, 页码 7997-8010出版社
SPRINGER
DOI: 10.1007/s10570-020-03223-5
关键词
Cellulose nanofibrils (CNFs); Algae cellulose; CNF viscoelastic properties; CNF morphological properties; CNF water retention values; CNF aspect ratios
资金
- School of Engineering and Built Environment, Edinburgh Napier University
- Zero Waste Scotland
Homogeneous high aspect ratio cellulose nanofibrils (CNFs) were prepared from Laminaria hyperborea (LH) seaweed cellulose without any initial mechanical, biological or chemical pre-treatments. Fourier-transform infrared spectrophotometry revealed that LH cellulose was of the cellulose I-alpha allomorph, typical of algal cellulose. Compared with wood derived CNF, significant enhancements in crystallinity, viscoelastic properties, water retention values (WRV) and morphological characteristics were identified with a single pass at 1 wt. % cellulose content through a high-pressure homogeniser. Further mechanical fibrillation did not lead to appreciable improvements in material properties that would justify the added energy consumption, which at a single pass is at least a factor of 10 lower than with wood cellulose processing. Good quality CNFs with little compromise in material properties were also obtainable at 2-3 wt. % cellulose contents as identified from viscoelastic analysis, WRV and morphological analysis. LHCNFs also showed good thermal stability, which in summary presents a multifunctional high value cellulose nanomaterial that can find application in various fields. [GRAPHICS] .
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