ABSTRACT
There has been an increasing interest during the past 30 years in the preparation of materials exhibiting multiple properties. Many reasons justify conducting research programs along this line. First, materials are present in numerous personal or industrial equipments. As demand increases, production means have to take into account environmental concerns (clean production and recyclability) together with reduction of costs. Therefore, reduction in weight and size, search for higher performances at smaller size (nanomaterials), and multifunctionality are active lines that research programs ˆ‘ŽŽ‘™–‘’”‘†—…‡ƒ–‡”‹ƒŽ•ˆ—Žϐ‹ŽŽ‹‰–Š‡•‡”‡“—‹”‡‡–•Ǥ
These programs largely target materials for electronic equipments. Reduction in weight is studied through the use of organic
materials as polymers, largely applied as matrix materials in com-’‘•‹–‡• ‹…‘”’‘”ƒ–‹‰ ‰Žƒ•• ‘” …ƒ”„‘ ϐ‹„‡”• ˆ‘”‡…Šƒ‹…ƒŽ ƒ’’Ž‹Ǧ …ƒ–‹‘•‘”…ƒ”„‘ƒ‘–—„‡•‘” ϐ‹„‡”• ˆ‘”…‘†—…–‹˜‡ƒ’’Ž‹…ƒ–‹‘•Ǥ A composite is a typical bifunctional material, both the matrix and –Š‡‡„‡††‡†ƒ–‡”‹ƒŽƒơ‘”†‹‰–™‘†‹ơ‡”‡–’”‘’‡”–‹‡•Ǥ‘–Š‡” ‡–Š‘† –‘ ƒơ‘”† „‹ˆ—…–‹‘ƒŽ‹–› ‹• –Š‡ —•‡ ‘ˆ •‹‰Ž‡Ǧ…‘’‘‡– materials. Inorganic bifunctional materials are known and studied ȋˆ‡””‘‡Ž‡…–”‹……‡”ƒ‹…•ǡˆ‘”‡šƒ’Ž‡Ȍǡ„—–…‘•‹†‡”ƒ„Ž‡‡ơ‘”–•Šƒ˜‡ been made for about 20 years to produce molecular multifunctional materials.
