Emerald Group Publishing Limited
Copyright © 2004, Emerald Group Publishing Limited
Readers may be less familiar with the electroluminescent and photoluminescent materials for coating applications. In this issue, the editorial team is pleased to include two papers reporting the investigation into the synthesis, characterisation and application of electroluminescent and photoluminescent materials.
Electroluminescent materials have found applications in thin film coatings. Dr Niu and his colleagues synthesised polyschiff base polymer carrying triarylamine in the backbone. Such modified polymers had good solubility in a wide range of organic solvents and good processibility. More importantly, the polyschiff base polymers prepared had good thermal stability, good photoconductivity and hole carrier mobility.
Readers may recall the Iran Colour Research Centre, lead by Professor Mirhabibi. Professor Mirhabibi is an expert in ceramic and luminescent materials for coating applications. Professor Mirhabibi and his colleagues reported their study into the synthesis and characterisation of photoluminescence materials, particularly the long afterglow Eu2+, Dy3+ doped Sr2MgSi2O7 phosphors. It was found that the co-doped phosphor acted as the hole trap levels and captured the free holes, thus prolonged the duration. It was encouraging to see that the doped phosphor gave clearly visible afterglow up to 5h.
Readers may recall the research into the synthesis and characterisation of pyrimidinone biocidal polymers based on poly-4- vinylacetophenone reported by Dr El-Masry and his colleagues (Pigment & Resin Technology, Vol. 33 No. 2). This issue included another paper from the research group lead by Dr El-Masry on the preparation and characterisation of biocidal halamine polymers. Such biocidal polymers were characterised by their insolubility in water, thus giving maximum safety to human when used in swimming pools and portable drinking water devices.
Recent years have seen rapid development of inkjet technology, particularly in the developed countries. Many had seen the inkjet as a unique technology for delivering small quantities of fluid at an extremely low wastage and a high precision. Consequently, an important trend in recent development of inkjet technology had been the expansion of the application of inkjet technology, beyond the field of graphic arts and reprography, into various manufacturing industries. Dr Lin and his colleague reviewed recent development in manufacturing technologies involving jetting technology. The authors also gave an overview into the exciting future of inkjet technology, which lies in further expansion of the jetting technology into the micro-manufacturing industries.
Pigments make significant contribution to the anticorrosive properties of the coating film. Professor El-Ghaffar and his colleagues reported their work on the synthesis and characterisation of various phosphate pigments having anti-corrosion capability. As the use of the traditional chromium containing anti-corrosive pigments is increasingly restricted across the globe, understanding and optimisation of the relatively more environmentally friendly anti-corrosive pigments, such as phosphate pigments had become more and more important.