𝔖 Bobbio Scriptorium
✦   LIBER   ✦

A new process of decrystallization and partial acetylation of cellulosic materials

✍ Scribed by A. K. Kulshreshtha; N. E. Dweltz

Publisher
John Wiley and Sons
Year
1977
Tongue
English
Weight
569 KB
Volume
21
Category
Article
ISSN
0021-8995

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

A new process of decrystallization of cellulosic materials^8^ is described. The process involves the preparation of alkali‐cellulose and an interaction between alkali‐cellulose and acetic anhydride. The decrystallized products thus obtained are partially acetylated and are designated as SPA (S for swollen, PA for partially acetylated) products. The effect of varying the alkali concentration on the structure and mechanical properties of SPA products is described. Maximum decrystallization is obtained when the swelling is carried out in alkali of intracrystalline swelling strength, prior to treatment with acetic anhydride. Acetylation is instrumental in retaining the highly decrystallized state. The structure of SPA cotton was characterized using chemical analyses, infrared spectroscopy, and x‐ray diffraction.

πŸ“œ SIMILAR VOLUMES

Grafting of acrylamide onto partially ac
Grafting of acrylamide onto partially acetylated and carboxymethylated cellulose
✍ A. A. Ibrahem; A. M. A. Nada πŸ“‚ Article πŸ“… 1986 πŸ› John Wiley and Sons 🌐 English βš– 298 KB πŸ‘ 1 views

Cotton linters and viscose grade wood pulp were partially acetylated and carboxymethylated. The samples were grafted under the same conditions with acrylamide. Grafting yield and efficiency depend on several factors, as the kind of pulp, chemical and physical structure, type of the introduced substi

Design, characterization and processing
Design, characterization and processing of cellulose-S-acetyl: a precursor to an electroactive cellulose
✍ Giuseppe D'aprano; Christelle Henry; Adelheid Godt; Gerhard Wegner πŸ“‚ Article πŸ“… 1998 πŸ› John Wiley and Sons 🌐 English βš– 475 KB

The synthesis and characterization of Cell-SAC 3, a cellulose isopentyl (IP) ether with additional pendant S-acetyl (SAC) moieties (degree of substitution DSlp = 2.5, DSsAc = 0.4) are reported. Cell-SAC forms stable monolayers at the air-water interface once spread from dilute chloroform solution. T