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- W2920978076 abstract "The impact of the nanoscale dimension on the carbonization of electrospun fibers is usually overlooked. In this study, we prove that it is a decisive factor in the outcome of the carbonization process. Six electrospun fibrous mats, each with a different average fiber diameter ranging from 80 nm to 781 nm were fabricated from a lignin/recycled-PET blend of mass ratio 1/1, and their weight loss and decomposition profile were monitored via thermogravimetry. The nano-size effect is evident for those electrospun mats with average diameter lower than 121 nm. These mats exhibit a significantly higher decomposition rate at the 180–260 °C temperature range, which leads to a considerable degree of fusion of the precursor nanofibers. Thus, the carbon structures formed from these mats do not retain the geometrical integrity of their precursor nanofibers. In contrast, no size-effects are manifested to the electrospun samples of average fiber diameter larger than 387 nm, as they decompose at a similar and lower rate between 180 and 260 °C and yield infusible carbon fibers with similar geometry as their corresponding precursor fibers. These results highlight the determinant role of the nano-dimension when carbon fibers are produced through the carbonization of precursor fibers at the sub-micron scale and point out its significance in processes controlled by heat and mass transfer phenomena, as in the case of carbonization." @default.
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- W2920978076 date "2019-07-01" @default.
- W2920978076 modified "2023-10-18" @default.
- W2920978076 title "The nanoscale dimension determines the carbonization outcome of electrospun lignin/recycled-PET fibers" @default.
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- W2920978076 doi "https://doi.org/10.1016/j.ces.2019.03.013" @default.
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