Dongcheon Choi MINJEONG, JANG Kim, Sung-Soo 2024-01-12T02:48:04Z 2024-01-12T02:48:04Z 2022-11-23 2022-11-25 https://pubs.kist.re.kr/handle/201004/76530 Most of commercial carbon fibers have been manufactured from polyacrylonitrile (PAN) due to their superior mechanical properties of PAN-derived carbon fibers. However, in comparison with other precursors, PAN is a relatively expensive precursor, which accounts for half of the total manufacturing cost of carbon fibers. It is therefore possible to reduce the manufacturing cost of carbon fibers if PAN is replaced with low-cost precursors such as lignin or cellulose. In this regard, lyocell, one of the cellulose-derived fiber materials, has been considered as a cost-effective carbon fiber precursor, and lyocell fibers are superior to other rayon fibers in terms of environmental friendliness because lyocell is processed with a non-toxic solvent (i.e. N-methylmorphoine N-oxide). However, lyocell fibers generally require an excessively lengthy thermal stabilization process to increase their low carbon yield owing to their low thermal stability during carbonization, while this lengthy stabilization process undermines the merit of lyocell fibers as one of the cost-effective carbon fiber precursors. In this work, we aimed to reduce the duration of thermal stabilization and simultaneously increase the carbon yield of lyocell fibers by treating precursor fibers with sulfuric acid prior to thermostabilization. We investigated the relationship between the mechanical properties of resulting fibers and various experimental parameters for thermal treatments including the stabilization temperature and time, demonstrating the catalyzing role of sulfuric acid during the early stage of thermostabilization. 한국탄소학회 More Effective Route for the fabrication of Lyocell-derived Carbon Fibers by using the Pretreatment with Sulfuric Acid Conference 2 2022년도 한국탄소학회 추계학술대회 2022년도 한국탄소학회 추계학술대회 KO 경주, The-K호텔 2022-11-24 2022년도 한국탄소학회 추계학술대회