Rhenium is one of the densest materials and has one of the highest melting points of all materials. It is produced as a by-product of copper smelting and has many useful properties. Its occurrence, production, properties, fabrication and applications are covered.
Sunflowers are a source of natural rubber. Researchers at Colarado State University are working on developing new varieties that produce increased amounts of rubber. Posted May 2002
Traditional printing on paper is now under threat from electronic paper and e-inks. The technology used for the flexible paper and the electronic ink materials are all covered.
Researchers have developed a high thermal conductivity graphite foam designed for use in protective clothing such as flight suits and race car overalls. The material can potentially remove heat from the skin and provide cool air allowing the skin to breathe. Posted May 2002
Aluminium cans have been in existence since 1960. Developments since then are outlined, as are the effects of competition such as PET and glass packaging.
Aluminium foil is commonly used in insulation for buildings, transmission wires, against radiation and from fire as well as heat exchangers and automotive applications. Specific applications and reasons for its suitability oin these areas are discussed.
Aluminium foil is one of the most familiar and popular materials used in the kitchen and makes up one thrid of the kitchen wraps market. Properties that make it suited to these applications, and the applications themselves are described.
Pyrolytic carbon is biocompatible and thromboresistant. This combined with wear resistance, durability and strength make it an ideal material for artificial heart valves. The development of the material and structure are explained as is the method for making coatings for heart valves.
Hydroxyapatite is a hydrated calcium phosphate. As such it dehydroxylates and decomposes upon exposure to elevated temperatures.
By Dr. Cameron Chai
13 Jun 2002
Cellulose acetate is derived from renewable resources such as wood pulp, which differs from most other man-made polymers which are petrochemical derivitives. General properties include transparency, glossiness, natural feel and good toughness. It is widely used for textiles, cigarette filters etc