Trimethylsilyl cellulose as precursor to regenerated cellulose fiber

Abstract

Trimethylsilyl cellulose (TMSC) has been found to melt at 320–340°C in the absence of oxygen. When TMSC is prepared from chemical cellulose, using hexamethyldisilazane and a catalytic amount of chlorotrimethylsilane/pyridine in dimethylformamide, a thermoplastic material is obtained which may be melt spun into a fiber. This fiber, when treated with mild aqueous acid, yields regenerated cellulose plus hexamethyldisiloxane. The hexamethyldisiloxane can be converted back to hexamethyldisilazane by known chemistry. The fiber properties of the regenerated cellulose were found to be comparable to commercially available rayons. X‐Ray diffraction analyses of the cellulose suggest formation of an unusual polymorphic form.

Smooth deuterated cellulose films for the visualisation of adsorbed bio-macromolecules

“…The deuterated cellulose films preparation methodology developed here was an adaptation of the methods of Greber and Paschinger41, Cooper42 and Cheng et al 5. Earlier, cellulose thin films using the methodology reported by Eriksson et al .…”

Preparation of Langmuir/Blodgett-cellulose Surfaces by Using Horizontal Dipping Procedure. Application for Polyelectrolyte Adsorption Studies Performed with QCM-D

“…Trimethylsilyl cellulose (TMSC, Figure 1) was prepared by silylation of microcrystalline cellulose powder from spruce (Fluka) with hexamethyl disilazane in the following way, as first suggested by Greber and Paschinger (1981) and Cooper et al (1981). One gram of cellulose was added to 50 ml of water and the suspension was left in refrigerator over night.…”

Crosslinked cellulose thin film composite nanofiltration membranes with zero salt rejection

“…TMSC is an attractive alternative to cellulose xanthogenate that was originally synthesized for making regenerated cellulose in order to replace the viscose process [11]. Trimethylsilyl (TMS) groups were introduced to mask the hydrophilic properties of cellulose and to break down its strong crystallinity, resulting in trimethylsilyl cellulose (TMSC) with good solubility in common organic solvents such as n-hexane and chloroform at room temperature.…”