Health and environmental safety aspects of friction grinding and spray drying of microfibrillated cellulose

@article{Vartiainen2011HealthAE,
  title={Health and environmental safety aspects of friction grinding and spray drying of microfibrillated cellulose},
  author={Jari Vartiainen and Tiina P{\"o}hler and Kristiina Sirola and Lea Pylkk{\"a}nen and Harri Alenius and Jouni Hokkinen and Unto Tapper and Panu Lahtinen and Anu Kapanen and Kaisa Putkisto and Panu Hiekkataipale and Paula Eronen and Janne Ruokolainen and Antti Laukkanen},
  journal={Cellulose},
  year={2011},
  volume={18},
  pages={775-786}
}
Microfibrillated cellulose (MFC), also referred to as nanocellulose, is one of the most promising innovations for forest sector. MFC is produced by fibrillating the fibres under high compression and shear forces. In this study we evaluated the worker exposures to particles in air during grinding and spray drying of birch cellulose. Processing of MFC with either a friction grinder or a spray dryer did not cause significant exposure to particles during normal operation. Grinding generated small… 

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Isolation and Characterization of Microfibrillated Cellulose from Agro-industrial Soybean Residue (Okara)

Microfibrillated cellulose (MFC) was isolated from the byproduct of soymilk, tofu, and okara (soybean residue) using a chemi-mechanical technique. Initially, petroleum ether treatment at 50 °C for 8
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References

SHOWING 1-10 OF 33 REFERENCES

Investigation of the durability of cellulose fibres in rat lungs

The goal of this investigation was to analyse quantitatively the biodurability of cellulose fibres in lungs of rats.

Chemical surface modifications of microfibrillated cellulose

Microfibrillated cellulose (MFC) was prepared by disintegration of bleached softwood sulphite pulp through mechanical homogenization. The surface of the MFC was modified using different chemical

Strength and barrier properties of MFC films

The preparation of microfibrillar cellulose (MFC) films by filtration on a polyamide filter cloth, in a dynamic sheet former and as a surface layer on base paper is described. Experimental evidence

Preparation and characterization of water-redispersible nanofibrillated cellulose in powder form

Water-redispersible, nanofibrillated cellulose (NFC) in powder form was prepared from refined, bleached beech pulp (RBP) by carboxymethylation (c) and mechanical disintegration (m). Two routes were

BC nanofibres: in vitro study of genotoxicity and cell proliferation.

Microfibrillated cellulose, a new cellulose product: properties, uses, and commercial potential

A new form of cellulose, which is expanded to a smooth gel when dispersed in polar liquids, is produced by a unique, rapid, physical treatment of wood cellulose pulps. A 2% suspension of

In vitro and In vivo Assessment of the Pulmonary Toxicity of Cellulose

The lung‐damaging effect of intratracheally administered cellulose was studied by biochemical and histological methods and contrary to the in vivo study, cellulose did not damage rat peritoneal macrophages.

Toxicity of intratracheally instilled cotton dust, cellulose, and endotoxin.

Data suggest that cotton dust produces a significant parenchymal lesion with elements similar to both the emphysematous response to endotoxin and the fibrotic nodular response to cellulose.

Biopersistence of man-made vitreous fibres.

A new bio-based nanocomposite: fibrillated TEMPO-oxidized celluloses in hydroxypropylcellulose matrix

Utilization of TEMPO-oxidized celluloses in bio-based nanocomposites is reported for the first time. TEMPO-oxidized wood pulps (net carboxylate content 1.1 mmol/g cellulose) were fibrillated to