Novel Method For Manufacturing Of
Aerocellulose
Author(s)
D. M. Rein & Y. Cohen
Abstract
The suggested novel method for producing the aerocellulose allows the
elimination of cellulose hydrogel collapse at oven drying, caused by capillary
forces. The addition of a compatible reactive agent (trimethylchlorosilane) and
its diffusion into the water-swollen cellulose hydrogel pores results in a reaction
with water, forming a leaving compound (hydrochloric acid) and a remaining
hydrophobic compound (hexamethyldisiloxane), which fills the initially
hydrophilic cellulose hydrogel pores, replacing and removing the remaining
water. The cellulose gel pores, filled by hexamethyldisiloxane, have a low
intrinsic surface tension thus allowing minimal shrinkage during very cheap
oven drying. All known processes for manufacturing the aerocellulose do not
allow its production at a reasonable cost.
Keywords: cellulose, hydrogel drying, aerocellulose.
1 Introduction
Plastics manufacturing processes utilize about 7-8% of the global use of crude
oil. However, as oil resources are depleted, it is logical to seek other sources of
sustainable and renewable polymers. Cellulose is by far the most abundant
polymer on earth, constituting around 70% of the total biomass; it is chemically
stable, insoluble in common liquids and does not thermally degrade below about
200°C in air. Furthermore, cellulose readily biodegrades and integrates in a
closed carbon life cycle.
Aerogels are a class of materials, which are characterised by their highly
porous structure and their low solids content. They are obtained from wet gels by
drying, largely maintaining the openness of the structure. If the structure
Keywords
cellulose, hydrogel drying, aerocellulose
Related Book
Other papers in this volume
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