Effect of fibril length, aspect ratio and surface charge on ultralow shear-induced structuring in micro and nanofibrillated cellulose aqueous suspensions

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@article{40e969363b6b4def8ceccaa33398c241,
title = "Effect of fibril length, aspect ratio and surface charge on ultralow shear-induced structuring in micro and nanofibrillated cellulose aqueous suspensions",
abstract = "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 evolving rheological properties in this way, it is possible to induce significant dewatering of the otherwise strongly water holding gel, while preserving gel structure. Microscopic observation of the corresponding freeze-dried aerogels, in which the structure of the wet state has been preserved due to water removal by sublimation, suggests the formation of a close packed liquid crystal-like structuration in the case where the fibril length is sufficient to drive entanglement under axial orientation.",
keywords = "Dewatering of nanocelulose gels, Microfibrillated cellulose, Nanocellulose, Rheology, Rheopectic structuring",
author = "Katarina Dimic-Misic and Thad Maloney and Patrick Gane",
year = "2018",
doi = "10.1007/s10570-017-1584-3",
language = "English",
volume = "25",
pages = "117–136",
journal = "Cellulose",
issn = "0969-0239",
number = "1",

}

RIS - Lataa

TY - JOUR

T1 - Effect of fibril length, aspect ratio and surface charge on ultralow shear-induced structuring in micro and nanofibrillated cellulose aqueous suspensions

AU - Dimic-Misic, Katarina

AU - Maloney, Thad

AU - Gane, Patrick

PY - 2018

Y1 - 2018

N2 - 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 evolving rheological properties in this way, it is possible to induce significant dewatering of the otherwise strongly water holding gel, while preserving gel structure. Microscopic observation of the corresponding freeze-dried aerogels, in which the structure of the wet state has been preserved due to water removal by sublimation, suggests the formation of a close packed liquid crystal-like structuration in the case where the fibril length is sufficient to drive entanglement under axial orientation.

AB - 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 evolving rheological properties in this way, it is possible to induce significant dewatering of the otherwise strongly water holding gel, while preserving gel structure. Microscopic observation of the corresponding freeze-dried aerogels, in which the structure of the wet state has been preserved due to water removal by sublimation, suggests the formation of a close packed liquid crystal-like structuration in the case where the fibril length is sufficient to drive entanglement under axial orientation.

KW - Dewatering of nanocelulose gels

KW - Microfibrillated cellulose

KW - Nanocellulose

KW - Rheology

KW - Rheopectic structuring

UR - http://www.scopus.com/inward/record.url?scp=85032701052&partnerID=8YFLogxK

U2 - 10.1007/s10570-017-1584-3

DO - 10.1007/s10570-017-1584-3

M3 - Article

VL - 25

SP - 117

EP - 136

JO - Cellulose

JF - Cellulose

SN - 0969-0239

IS - 1

ER -

ID: 16987992