TAILIEUCHUNG - Carbon Materials for Advanced Technologies Episode 4

Tham khảo tài liệu 'carbon materials for advanced technologies episode 4', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 100 based on poly vinylidene chloride PVDC or Saran fibers 19-21 ACF based on phenolic fibers Kynol 22-27 . Army 28-30 Carborundum and ACF based on poly acrylonitrile PAN and rayon fibers 31-33 . military . There has also been extensive work on ACF in Japan. Much of this has been published in Japanese and is not readily assimilated by those who do not communicate in that language. However a recent review 18 highlights the most important developments in Japan in ACF. These originated mainly from industry companies such as Toho Beslon now part of Toho Rayon and Toyobo seem to have been particularly active. Fig. 2. Number of publications on active carbon fibers between 1981 and 1997 dotted line is best fit linear trend . While rayon is still used as precursor for ACF there has been a good deal of work since the 1970s on developing materials made from PAN pitch and phenolic-resin as these appear to be easier and or more economical to make than those based on rayon or other organic fibers as well as generally having greater surfaces areas and other associated properties. Both fundamental and applied aspects of ACF are of continuing interest. As an idea of the degree of effort in this area over 500 papers patents books etc. have been published in English on ACF. To illustrate this Fig. 2 is a plot of number of publications on ACF over time in the period 1981-1997 the publications all contain the words active or activated carbon fiber s in then titles. While only a large subset of all publications involving ACF some papers on activated carbon cloths might 101 not be included for instance the data in Fig. 2 suggest that there has been a steady approximately linear increase in public output on ACF since 1981 with an extra two or three publications appearing per year. The main themes of this significant output especially the applications of ACF in advanced technologies are dealt with below. However it should be emphasized that only information on ACF in the public .

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