Specific surface area increase during cellulose nanofiber manufacturing related to energy input

Moser, Carl,1987-KTH,Fiber- och polymerteknologi,Valmet AB, Sweden,KTH Royal Institute of Technology; Valmet AB (author)

QC 20161121
Softwood fibers pretreated with a monocomponent endoglucanase were used to prepare a series of cellulose nanofiber qualities using a microfluidizer and 2 to 34 MWh ton-1 of energy input. The specific surface area was determined for the series using critical point drying and gas adsorption. Although the specific surface area reached a maximum of 430 m2 g-1 at 11 MWh ton-1, the nanofiber yield and transmittance continued to increase beyond this point, indicating that more energy is required to overcome possible friction caused by an interwoven nanofiber network unrelated to the specific surface area. A new method for estimating the surface area was investigated using xyloglucan adsorption in pure water. With this method it was possible to follow the disintegration past the point of maximum specific surface area. The technical significance of these findings is discussed.

Henriksson, GunnarKTH,Fiber- och polymerteknologi,KTH Royal Institute of Technology(Swepub:kth)u1lkf75c (author)
Lindström, Mikael E.KTH,Fiber- och polymerteknologi,KTH Royal Institute of Technology(Swepub:kth)u1uxn4q9 (author)
KTHFiber- och polymerteknologi (creator_code:org_t)

By the author/editor: Moser, Carl, 198 ...; Henriksson, Gunn ...; Lindström, Mikae ...

About the subject

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Chemical Enginee ...; and Polymer Technolo ...

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Materials Engine ...; and Paper Pulp and F ...

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