Microcrystalline cellulose property–structure effects in high-pressure fluidization: microfibril characteristics

The raw material properties and characteristics of four different microfibrillated celluloses (MFCs) produced by microfluidizing were investigated. The cellulose materials were never-dried and dried microcrystalline cellulose (MCC), a commercial MCC, and an enzymatic-mechanically treated softwood su...

Full description

Saved in:
Bibliographic Details
Published in:Journal of materials science 2016-06, Vol.51 (12), p.6019-6034
Main Authors: Vanhatalo, Kari, Lundin, Tom, Koskimäki, Asko, Lillandt, Marcus, Dahl, Olli
Format: Article
Language:English
Subjects:
Air pollution
Cellulose
Characterization and Evaluation of Materials
Chemistry and Materials Science
Classical Mechanics
Consistency
Crystalline cellulose
Crystallography and Scattering Methods
Drying
Efficiency
Enzymes
Fibrillation
Fluidizing
Heterogeneity
Levels
Material properties
Materials Science
Original Paper
Polymer Sciences
Pressure effects
Raw materials
Solid Mechanics
Sulfite pulp
Sulfites
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The raw material properties and characteristics of four different microfibrillated celluloses (MFCs) produced by microfluidizing were investigated. The cellulose materials were never-dried and dried microcrystalline cellulose (MCC), a commercial MCC, and an enzymatic-mechanically treated softwood sulfite pulp. The study comprises extensive initial and final physical, structural, and molecular-level analyses. The results indicated that raw material properties related to both fibril aggregation, structural compaction levels and geometric heterogeneity and interaction levels essentially affected both the process and the final MFC properties. The increase in specific surface area (SSA) was minor for the enzymatic-mechanically treated raw material, while MCC showed a larger increase of several orders of magnitude in SSA. The drying of particulate MCC was reflected both in improved fibrillation efficiency and in the final MFC properties, primarily observed as enhanced SSA, in fibril dimensions and in gel strength. The feed consistency (7.5 %) applicable with dried, particulate MCC in fluidization was more than any of those hitherto reported. The study indicated that MCC can facilitate energy-efficient MFC production with the application of fluidization technology.
ISSN:0022-2461
1573-4803
DOI:10.1007/s10853-016-9907-6