Ultra strong pyroprotein fibres with long-range ordering

Collection with item attached
2017
Item details URL
http://open-repository.kisti.re.kr/cube/handle/open_repository/486639.do
DOI
10.1038/s41467-017-00132-3
Title
Ultra strong pyroprotein fibres with long-range ordering
Description
This research was supported by Basic Science Research Programs throughthe National Research Foundation of Korea Government(NRF-2016R1A2B4009601, NRF-2017R1A1A1A05000789 and NRF-2017R1C1B1004167)and the Korea Institute of Science and Technology (KIST) Programs(2Z04980 and 2Z05120).
abstract
Silks are protein-based natural structured materials with an unusual combination of high strength and elongation. Their unique microstructural features composed of hard beta-sheet crystals aligned within a soft amorphous region lead to the robust properties of silks. Herein we report a large enhancement in the intrinsic properties of silk through the transformation of the basic building blocks into a poly-hexagonal carbon structure by a simple heat treatment with axial stretching. The carbon clusters originating from the beta-sheet retain the preferred orientation along the fibre axis, resulting in a long-range-ordered graphitic structure by increasing heat-treatment temperatures and leading improvements in mechanical properties with a maximum strength and modulus up to similar to 2.6 and similar to 470 GPa, respectively, almost four and thirty times surpassing those of raw silk. Moreover, the formation of sp(2) carbon configurations induce a significant change in the electrical properties (e.g. an electrical conductivity up to 4.37 x 10(3) S cm(-1)).
provenance
Made available in Cube on 2018-09-28T16:12:59Z (GMT). No. of bitstreams: 0
language
English
author
Cho, Se Youn
Yun, Young Soo
Jang, Dawon
Jeon, Jun Woo
Kim, Byung Hoon
Lee, Sungho
Jin, Hyoung-Joon
orcid
Cho, Se Youn/0000-0002-4898-0488
accessioned
2018-09-28T16:12:59Z
available
2018-09-28T16:12:59Z
issued
2017
citation
NATURE COMMUNICATIONS(8)
issn
2041-1723
uri
http://open-repository.kisti.re.kr/cube/handle/open_repository/486639.do
Funder
과학기술정보통신부
Funding Program
한국과학기술연구원연구운영비지원
Project ID
1711063843
Jurisdiction
Rep.of Korea
Project Name
melt spinning, carbon fiber, low-cost carbon fiber
rights
openAccess
type
article


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