Microstructured Products
-
Upload
emerald-bryant -
Category
Documents
-
view
15 -
download
2
description
Transcript of Microstructured Products
Microstructured ProductsCHEMICAL PRODUCT ENGINEERING ASEP MUHAMAD SAMSUDIN
Chemical Products
Commodities Chemical Devices Molecular Products
Microstructures Products
Examples Ethylene, ammonia Artificial kidneys Penicillin Sunscreen
Scale Continuum Meters Nanometers Micrometers
Key Cost Convenience Discovery Function
Basis Reaction Engineering, Unit operations
Reaction Engineering, Unit operations
Chemistry Recipe
Risk Feedstock Intellectual Property Discovery Science
Cussler and Moggridge
Cussler EL, Moggridge GD. Chemical product design. 2nd edition. Cambridge: Cambridge University Press; 2011.
Based on the characteristic size scale which is critical to their performance
Critical size of Chemical Products
Introduction
“Microstructure” mean chemical organization on the scale of micrometer
Product with microstructure supply added value because of the physical and chemical properties of the microstructure.
The Microstructures help the customer satisfy a specific need.
For the microstructured products, the most difficult step in design is needs step.
Microstructured Products by Industrial Sector
Product Form Aerosols Liquids and Liquid mixtures
Cream and Pastes
Structured Solids
Specialty Chemicals
Bug Sprays, Spray Paints
Degreasers, Lube additives
Adhesives, Anti-icers
Polymer Composites
Agrochemicals Herbicides, Insecticides
Liquid Fertilizer Dairy Cleaners
Controlled release Chemicals
Pharmaceuticals and Healthcare Products
Inhalants Syrups Anti-itch cream
Dietary Supplements
Foods, Flavors, and Fragrances
Perfume, cooking spray (PAM)
Juices, Cooking Oil Ice Cream, Ketchup
Margarines, Candies
Personal Care Product, Cosmetics
Hair sprays, deodorants
Shampoos, Liquid Detergents
Sunscreen, toothpaste
Solid Detergents, Soaps
Home and Office Products
Air Fresheners, Ink, Waxes Paper, Packaging
Aerosols
Liquids and Liquid mixtures
Cream and Pastes
Structured Solid
Properties of Microstructures
The physical and chemical properties of microstructures vary widely, partially because their ingredients vary widely.
Fluids are characterized by their viscosity, and solid by their Young’s modulus and yield stress
The Physical properties of microstructured products are often very different to the properties of the ingredients from which they are made.
The physical properties of microstructured products are often complex. The complex properties are often simplified because the continuous phase dominates many of the physical properties. E.g. Sun cream.
Many microstructured products change their structured during use. E.g. Ice cream, paint.
Properties of Microstructures
Properties of Microstructures
Example : Liquid Bandages
Any bandages must meet three chief needs : they must keep out bacteria and debris,
they must maintain a proper moisture balance, allowing the cut to dry,
they must reduce paint by covering nerve ending.
What microstructure should they have?
Solution
To keeping Cut clean : It must not have any pores larger than the size of bacterium, around 1 µm.
To allow water evaporation : it should have a resistance to water transport which is less than the resistance air surrounding the wound.
To reduce pain : The liquid bandages solution should contain an approved disinfectant, like iodine and use willow sap, which includes salicylic acid, the active part of aspirin
Get Started
The microstructured product design involve two key steps. The need of product must be expressed as quantitative
specification.
The need will be expressed as consumer desires.
Get Started
Evaluate consumer need
Relate this needs to Particular Physical properties
Specify the desire values of these physical properties
Need Vs. Physical Properties
Answer three question How to tell when two properties are related?
Choose the best descriptors
Discover relation between the best descriptors and relevant combination of physical properties.
Specifications