Characteristics of concentrated lignocellulosic nanofibril suspensions
نویسندگان
چکیده
Lignocellulosic nanofibrils (LCNFs) are usually isolated from biomass with concentration less than 2.0 wt%. The low limits the transportation and end-use applications of LCNFs. Therefore, development process characteristics concentrated LCNF become desirable important for commercial deployment application. In this study, 1.0 wt% suspension was prepared by mechanical fibrillation using a supermass grinder after enzymatic pretreatment, then dewatered to solid concentrations 5.9 wt%, 16.3 25.9 centrifuge. un-concentrated obviously stable, being translucent, well dispersed in water, while suspensions exhibited gel-like behavior or “solid-like” depending on concentration. Bundle-like fibrils were observed LCNFs, average diameter became large but still 100 nm. Un-concentrated LCNFs had similar crystallinity crystallite size, morphological changes mainly amorphous regions fibrils. films relatively good UV-blocking property, water absorption oxygen permeability. increasing basis weight benefit enhancing surface smoothness interweaves between fibrils, resulting tensile index specific modulus higher 71.7 kN·m·kg−1 6.8 MN·m·kg−1, respectively. sum, affected morphology structure LCNF, kept properties. Concentration may be feasible strategy large-scale production storage.
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ژورنال
عنوان ژورنال: Cellulose
سال: 2021
ISSN: ['1572-882X', '0969-0239']
DOI: https://doi.org/10.1007/s10570-021-04304-9