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Micro and nanofibrillated celluloses are essentially one-dimensional high aspect ratio particulate materials, which can undergo two-dimensional layer (band) structuring under controlled ultralow rates of shear, typically ~ 0.01 s−1. Depending on the fibril aspect ratio this structure formation acts to develop internal strain within the gel matrix, inducing solid–liquid phase separation. By controlling...
The wetting behavior of nanofibrillated cellulose (NFC) was drastically changed from hydrophilic to superhydrophobic, achieving limited contact angle hysteresis. Remarkably, superhydrophobicity was attained for a variety of morphologies, namely dense and porous films, foams and powders, thus exploiting a wide spectrum of cellulose manifestations. The superhydrophobic behavior resulted from the combined...
Cellulose nanofibrils and poly(lactic acid) microfibrils, two bio-based polymers were used to elaborate composite films, and their properties were evaluated. Cellulose nanofibrils were obtained from organic pulping with total chlorine-free bleaching and were manufactured using high-pressure homogenization; while poly(lactic acid) microfibrils were obtained from a commercial partner. Morphological...
In this study, oil palm mesocarp fiber (OPMF) was pretreated with (1) superheated steam (SHS) and (2) potassium hydroxide (KOH) to remove hemicellulose. Both SHS–OPMF and KOH–OPMF underwent delignification step to isolate the cellulose and dissolved in selected ionic liquid and its co-solvent before being electrospun to obtain microfibrillated cellulose (MFC). FE-SEM images showed that SHS–OPMF cellulose...
The aim of this study was to determine the effects of hydrothermal treatment of microfibrillated cellulose (MFC) on its gel stability, water retention and rheological behavior. MFC gel was prepared by fibrillating endoglucanase pre-treated, never-dried dissolving pulp. The MFC gel samples were then exposed in a static chamber for different times at different temperatures. At temperatures of 120–150 °C,...
This work aims at the development and characterisation of bio-based active bi-layer films by solvent casting and electrospinning in order to be used for setting up active packaging solutions. Ethyl cellulose was used as the main material for the production of a layer on microfibrillated cellulose (MFC) films. This layer was formed with and without the incorporation of cinnamaldehyde (CNMA) which was...
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