Classification and Identification of Cellulose
Release Time:
2020-09-04
Source:
Classification and Identification of Cellulose
Classification of Cellulose Ethers
1. Ionic
Sodium Carboxymethyl Cellulose (NaC Cellulose)
Sodium Carboxymethyl Hydroxyethyl Cellulose (NaCMHEC)
2. Nonionic
Methyl cellulose ether (cellulose)
Hydroxyethyl Cellulose Ether (HEC)
Methyl Hydroxyethyl Cellulose Ether (MHEC)
Grade: LH40M, LH70M,
Hydroxypropyl Methylcellulose Ether (MHPC)
Quality identification of cellulose ethers:
Impact of methoxy content on water retention and thickening performance
Effect of hydroxyethoxy/hydroxypropoxy content on quality: the higher the content, the better the water-retention performance.
Effect of viscosity quality: The higher the degree of polymerization, the higher the viscosity and the better the water-retention capacity.
Effect on fineness quality: The finer the particle size, the faster and more uniformly it disperses and dissolves in the mortar, resulting in better water retention.
Impact on light transmittance quality: the higher the value, the more uniform the polymerization degree and the fewer impurities.
Effect of gel temperature on quality: The gel temperature for construction applications is around 75°C.
Moisture content impact: <5%; cellulose ethers are hygroscopic and must be stored in a sealed container.
Impact of ash content: <3%; the higher the ash content, the more impurities present.
Effect of pH on quality: Near-neutral pH; cellulose ethers exhibit stable performance across a pH range of 2–11.
