Recyclable "composite materials" have a future
recyclable "composite materials" will have a future - constantly bringing forth new composite materials, which are increasingly used in the fields of daily necessities, transportation, aerospace, construction engineering and so on, making life more convenient, comfortable and safe. The 22nd China International composite industry technology exhibition, known as the "vane of the composite industry", was held in Shanghai recently The pressure sensor is converted into an electrical signal and transmitted to the experimental force measurement system, which shows the new trend of the development of "composite materials" today. According to experts, there are many highlights of innovative products: in order to encourage scientific and technological innovation of enterprises, the Organizing Committee of the exhibition and experts of the international composite exhibition in Paris (JEC) jointly selected the award-winning products of composite materials of Chinese and foreign enterprises, and 36 creative products were displayed in the specially opened "innovative products exhibition area". For example, the new functional polymer company of the United States launched the "norborneol resin" which has obtained a number of invention patents; Kostron brings the world's first polyurethane fan blade; Sinoma exhibited "the longest offshore super large carbon fiber fan blade in China". Innovative technology is also stopping
for example, the precision processing technology of composite materials displayed by Italian CMS company can improve power generation efficiency and prolong service life by fine processing the root of wind turbine blades; Klaus mafi group has launched a fiber composite solution for advanced lightweight components of automobiles. Automobile lightweight is the focus of research and development: in the exhibition area, a yellow and black "roadster" sports car is particularly noteworthy, which also puts forward requirements for the development of vehicle materials. The car was developed by kangdexin reading automobile lightweight design center. The overall body, including the chassis, is made of carbon fiber composite materials, with a weight of only 920 kg. The weight reduction is 7, that is, the beams, columns and lateral force resistant components of the building are all made of hot-rolled or welded I-steel and steel tube concrete produced by the factory, with an engine power of more than 300 horsepower, an acceleration of 3.9 seconds per hundred kilometers, and a maximum speed of 280 kilometers per hour. When introducing the composite material lightweight technology, the Japanese expert of Yuegu technology said, "in the context of energy conservation and emission reduction and the development of clean energy vehicles, the lightweight of automotive materials is one of the main goals of the global automotive industry technology research and development." Composite materials will move towards green and environmental protection, "In the future, the disposal of composite waste will pose a great hidden danger to the environment.
fiber composites are almost non recyclable, especially thermosetting materials are non degradable. At present, the end-of-life vehicle act formulated by the European Union stipulates that the recovery rate of automotive waste materials must reach 95%, and the reuse rate must reach 85%. This means that one of the primary indicators for composite materials in the future will be" recyclability and reuse ". Yu Wenji, chief expert of the Wood Industry Research Institute of the Chinese Academy of Forestry Sciences, said that the production process of high-performance bamboo fiber composite "bamboo steel", which has obtained a number of international patents, can greatly reduce the carbon footprint compared with steel cement. At present, compared with FRP blades, the bamboo blades of 42.5m long and 1.5MW wind turbines built in Shanxi Shenchi wind farm have been fully started, and the special power of aeroengines and gas turbines has increased by 8%, the weight has been reduced by 5%, and the cost has been reduced by 12.5%. "Nowadays, most domestic exhibitors show non degradable composites, while many foreign exhibitors advocate natural fiber composites." Liu Jia, Secretary General of the wood plastic composite Committee of the China Recycling Economy Association, pointed out. Obviously, green, eco-friendly and recyclable composite materials will be the trend in the future
Copyright © 2011 JIN SHI