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In this study, pulped cellulose fibres were pre-treated with aqueous morpholine prior to mechanical disruption in the production of cellulose nanofibrils (CNF). The properties of the morpholine pre-treated CNF (MCNF) were closely compared with CNF obtained from carboxymethylation (CMCNF) and TEMPO-oxidation (TCNF) pre-treatment methods. An investigation of the swelling behaviours of cellulose in varying...
We investigated the optimal reaction conditions for carboxymethylation as a pretreatment method for the production of cellulose nanofibrils (CNF). The influence of the reaction sequence, solvent composition, and presence of water in the reaction medium on the carboxymethylation of pulp was studied. We also investigated the effects of water in the reaction medium on CNF properties. The most effective...
A simple but cost-effective method for preparing a novel partially carboxymethylated cotton gauze (PCG) with silver nanoparticles (AgNPs; i.e., PCG/Ag) was developed through carboxymethylation modification and reduction of Ag nitrate using polyvinylpyrrolidone (PVP) as a coating and complexing agent. The Fourier transform infrared spectrum of PCG/Ag revealed an absorption band at 1610 cm−1 and no...
This study investigated the effects of carboxyl content and mechanical treatment intensity on the morphological characteristics of carboxymethylated cellulose nanofibrils (CM CNFs) and on the rheological properties of CM CNF suspension. The mechanical properties of self-standing CM CNF film were also examined. CM CNFs produced under different conditions had similar, uniform widths of about 5 nm, as...
Herein, we present a route to obtain bi-functional cellulose nanofibrils (CNF) by a one-pot approach using an already established functionalisation route, carboxymethylation, to which a subsequent functionalisation step, allylation or alkynation, has been added in the same reaction pot, eliminating the need of solvent exchange procedures. The total charge of the fibres and the total surface charge...
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