cellulose ester การใช้

• Dialysis membranes for laboratory use are typically made of a film of regenerated cellulose or cellulose esters.
• Membranes based on cellulose esters are typically supplied wet and come in a greater range of MWCOs.
• Millipore's cellulose ester filters were used widely in early experiments to micrometer ) up to 20 祄.
• Membrane filters used in production processes are commonly made from materials such as mixed cellulose ester or polyethersulfone ( PES ).
• Polymeric dense membranes such as polytetrafluoroethylene and cellulose esters are usually fabricated by compression molding, spraying of a polymer solution.
• Due to their additional crosslinking, regenerated cellulose membranes have better chemical compatibility and heat stability than membranes made from cellulose esters.
• Tetramethylurea also dissolves cellulose ester and swells other polymers such as polycarbonates, polyvinyl chloride or aliphatic polyamides, usually at elevated temperature.
• It is formed naturally in small amounts during many fermentation processes and used as a solvent in the pharmaceutical industry mainly for resins and cellulose esters.
• Pre weighted filter and matched weight filters made from polyvinyl chloride or mixed cellulose ester are suitable for respirable dust ( less than 10 micrometers in diameter ).
• Hexachloroethane has been used as an anthelmintic in veterinary medicine, a rubber accelerator, a component of fungicidal and insecticidal formulations as well as a moth repellant and a plasticizer for cellulose esters.
• The hydroxyl groups (-OH ) of cellulose can be partially or fully reacted with various reagents to afford derivatives with useful properties like mainly cellulose esters and cellulose ethers (-OR ).
• This requires collection of the sample on a methyl-cellulose ester ( MCE ) filter and acid digestion of the collection media in the laboratory followed by measuring metal concentration though an atomic absorption ( or emission ) spectrophotometery.