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α-cellulose, Powder

Typical Properties
CAS 9004-34-6
Catalog ACM9004346-36
Molecular Weight 324.28 g/mol
Melting Point 76-78 °C
Flash Point 260 °C
Appearance White to off-white
Storage Room Temp
Biological Source Plant
Color White to off-white
Composition (C6H10O5)n
EC Number 232-674-9
Grade Reagent Grade
MDL Number MFCD00081512
pH 5-7.5 (20 °C, 100 g/L in H₂O, slurry)
Quality Level 200
Shipping Ambient
Stability Stable. Combustible. Incompatible with strong oxidizing agents.
Overview
Description

α-cellulose is a homogeneous polymer composed of D-glucopyranosyl groups linked by 1,4-β glycosidic bonds. In addition to the two end groups in the α-cellulose molecule, each glucose group has three hydroxyl groups. The average degree of polymerization is about 10,000. Due to the polarity of the cellulose hydroxyl groups, water can enter the amorphous region and limited swelling of the crystalline region occurs. Some aqueous solutions of acids, bases and salts can penetrate into the crystallization zone under certain conditions, resulting in infinite swelling and dissolution of cellulose. α-cellulose is cellulose raw material immersed in 17.5% or 18% sodium hydroxide solution at 20°C. After 45 minutes, the insoluble part is α-cellulose, and its degree of polymerization is very large. Because the fibers are strong and tough, the formed filter aid layer should not be peeled off and cracked. In addition, because it has a certain electrostatic adsorption effect, it can improve the filtration efficiency.

Features

Large specific surface area; Good thermal stability; High crystallinity; Low degree of aggregation

Application

Mainly used as a filter aid in the ion-exchange membrane alkali production industry