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Bio-renewable fibers extracted from ...

Chen, Keke.

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Bio-renewable fibers extracted from lignin/polylactide (PLA) blend.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Bio-renewable fibers extracted from lignin/polylactide (PLA) blend./
Author:	Chen, Keke.
Description:	65 p.
Notes:	Source: Masters Abstracts International, Volume: 50-06, page: 4131.
Contained By:	Masters Abstracts International50-06.
Subject:	Engineering, Materials Science. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1512148
ISBN:	9781267390752

Bio-renewable fibers extracted from lignin/polylactide (PLA) blend.
Chen, Keke.

Bio-renewable fibers extracted from lignin/polylactide (PLA) blend. - 65 p.

Source: Masters Abstracts International, Volume: 50-06, page: 4131.

Thesis (M.S.)--Iowa State University, 2012.

Due to the high cost and environment issues in the production of carbon fiber from polyacrylonitrile (PAN) and pitch, the use of low cost bio-renewable materials are of great interest as an alternative precursor. Lignin is a highly aromatic biopolymer, extracted as a byproduct of wood pulping and has been investigated as a suitable precursor for carbon fibers. In the present work, we have demonstrated the feasibility of spinning modified lignin/polylactide (PLA) blend into robust, fine lignin fibers. Chemical modification of raw lignin via butyration was investigated to enhance the miscibility of lignin with PLA due to the formation of ester functional groups in place of highly polar hydroxyl (-OH) groups. The butyrated structure was confirmed by nuclear magnetic resonance (NMR) spectroscopy and fourier transform infrared spectroscopy (FTIR). Modified lignin /PLA blends at different compositions were prepared by melt mixing in a twin-screw micro compounder. The influence of the blend composition on the compatibility between lignin and PLA was examined by differential scanning calorimetry (DSC) and dynamic mechanical analysis (DMA). Thermogravimetric analysis (TGA) results of different blends revealed a systematic enhancement in the stability of the blends with the increase in PLA content from 0 to 50 wt .%. Lignin fibers were measured to possess modulus of about 500 to 2500 MPa, varied by B-lignin and PLA composition. Cylindrical morphology was observed in all lignin fibers. After carbonization, microvoids structure could be seen in lignin-based carbon fibers. Carbon fibers from B-lignin/PLA 75/25 maintained fibrous structure while carbon fibers from other ratios deformed during carbonization.

ISBN: 9781267390752Subjects--Topical Terms:

1017759
Engineering, Materials Science.

Bio-renewable fibers extracted from lignin/polylactide (PLA) blend.
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020 $a 9781267390752
035 $a (MiAaPQ)AAI1512148
035 $a AAI1512148
040 $a MiAaPQ $c MiAaPQ
100 1 $a Chen, Keke. $3 1919355
245 1 0 $a Bio-renewable fibers extracted from lignin/polylactide (PLA) blend.
300 $a 65 p.
500 $a Source: Masters Abstracts International, Volume: 50-06, page: 4131.
500 $a Adviser: Michael Kessler.
502 $a Thesis (M.S.)--Iowa State University, 2012.
520 $a Due to the high cost and environment issues in the production of carbon fiber from polyacrylonitrile (PAN) and pitch, the use of low cost bio-renewable materials are of great interest as an alternative precursor. Lignin is a highly aromatic biopolymer, extracted as a byproduct of wood pulping and has been investigated as a suitable precursor for carbon fibers. In the present work, we have demonstrated the feasibility of spinning modified lignin/polylactide (PLA) blend into robust, fine lignin fibers. Chemical modification of raw lignin via butyration was investigated to enhance the miscibility of lignin with PLA due to the formation of ester functional groups in place of highly polar hydroxyl (-OH) groups. The butyrated structure was confirmed by nuclear magnetic resonance (NMR) spectroscopy and fourier transform infrared spectroscopy (FTIR). Modified lignin /PLA blends at different compositions were prepared by melt mixing in a twin-screw micro compounder. The influence of the blend composition on the compatibility between lignin and PLA was examined by differential scanning calorimetry (DSC) and dynamic mechanical analysis (DMA). Thermogravimetric analysis (TGA) results of different blends revealed a systematic enhancement in the stability of the blends with the increase in PLA content from 0 to 50 wt .%. Lignin fibers were measured to possess modulus of about 500 to 2500 MPa, varied by B-lignin and PLA composition. Cylindrical morphology was observed in all lignin fibers. After carbonization, microvoids structure could be seen in lignin-based carbon fibers. Carbon fibers from B-lignin/PLA 75/25 maintained fibrous structure while carbon fibers from other ratios deformed during carbonization.
590 $a School code: 0097.
650 4 $a Engineering, Materials Science. $3 1017759
690 $a 0794
710 2 $a Iowa State University. $b Materials Science and Engineering. $3 1025701
773 0 $t Masters Abstracts International $g 50-06.
790 $a 0097
791 $a M.S.
792 $a 2012
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1512148