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Obtaining high mechanical performance silk fibers by feeding purified carbon nanotube/lignosulfonate composite to silkworms

Silkworm fibers have attracted widespread attention for their superb glossy texture and promising mechanical performance. The mechanical properties can be reinforced with carbon nanofillers, particularly carbon nanotubes (CNTs), depending on the CNT content in the silk fibers. In order to increase t...

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Detalles Bibliográficos
Autores principales: Xu, Hao, Yi, Wenhui, Li, Dongfan, Zhang, Ping, Yoo, Sweejiang, Bai, Lei, Hou, Jin, Hou, Xun
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9060236/
https://www.ncbi.nlm.nih.gov/pubmed/35518113
http://dx.doi.org/10.1039/c8ra09934k
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author Xu, Hao
Yi, Wenhui
Li, Dongfan
Zhang, Ping
Yoo, Sweejiang
Bai, Lei
Hou, Jin
Hou, Xun
author_facet Xu, Hao
Yi, Wenhui
Li, Dongfan
Zhang, Ping
Yoo, Sweejiang
Bai, Lei
Hou, Jin
Hou, Xun
author_sort Xu, Hao
collection PubMed
description Silkworm fibers have attracted widespread attention for their superb glossy texture and promising mechanical performance. The mechanical properties can be reinforced with carbon nanofillers, particularly carbon nanotubes (CNTs), depending on the CNT content in the silk fibers. In order to increase the CNT content, lignosulfonate (LGS) was used as a surfactant to ameliorate the CNT solubility, dispersibility, and biocompatibility. The resulting CNT/LGS nano-composite was further processed through an additional purification method to remove excess surfactant and enhance the CNT/LGS ratio. Then the purified biocompatible single and multiple-walled CNTs were fed to silkworms, leading to a large CNT content in the resulting silk fibers. Reinforced silk fibers were produced with a mechanical strength as high as 1.07 GPa and a strain of 16.8%. The toughness modulus is 1.69 times than that of the unpurified group. The CNT-embedded silk fibers were characterized via Raman spectrometry and thermogravimetric analysis (TGA), demonstrating that the CNT content in the silk fibers increased 1.5-fold in comparison to the unpurified group. The increased CNT content not only contributed to the self-assembly into buffering knots of silk fibers, but it also enhanced the conductivity of graphitized silk. Our coating and purification strategies provide a potential facile way to obtain natural silk fibers with high mechanical performance.
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spelling pubmed-90602362022-05-04 Obtaining high mechanical performance silk fibers by feeding purified carbon nanotube/lignosulfonate composite to silkworms Xu, Hao Yi, Wenhui Li, Dongfan Zhang, Ping Yoo, Sweejiang Bai, Lei Hou, Jin Hou, Xun RSC Adv Chemistry Silkworm fibers have attracted widespread attention for their superb glossy texture and promising mechanical performance. The mechanical properties can be reinforced with carbon nanofillers, particularly carbon nanotubes (CNTs), depending on the CNT content in the silk fibers. In order to increase the CNT content, lignosulfonate (LGS) was used as a surfactant to ameliorate the CNT solubility, dispersibility, and biocompatibility. The resulting CNT/LGS nano-composite was further processed through an additional purification method to remove excess surfactant and enhance the CNT/LGS ratio. Then the purified biocompatible single and multiple-walled CNTs were fed to silkworms, leading to a large CNT content in the resulting silk fibers. Reinforced silk fibers were produced with a mechanical strength as high as 1.07 GPa and a strain of 16.8%. The toughness modulus is 1.69 times than that of the unpurified group. The CNT-embedded silk fibers were characterized via Raman spectrometry and thermogravimetric analysis (TGA), demonstrating that the CNT content in the silk fibers increased 1.5-fold in comparison to the unpurified group. The increased CNT content not only contributed to the self-assembly into buffering knots of silk fibers, but it also enhanced the conductivity of graphitized silk. Our coating and purification strategies provide a potential facile way to obtain natural silk fibers with high mechanical performance. The Royal Society of Chemistry 2019-01-25 /pmc/articles/PMC9060236/ /pubmed/35518113 http://dx.doi.org/10.1039/c8ra09934k Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/
spellingShingle Chemistry
Xu, Hao
Yi, Wenhui
Li, Dongfan
Zhang, Ping
Yoo, Sweejiang
Bai, Lei
Hou, Jin
Hou, Xun
Obtaining high mechanical performance silk fibers by feeding purified carbon nanotube/lignosulfonate composite to silkworms
title Obtaining high mechanical performance silk fibers by feeding purified carbon nanotube/lignosulfonate composite to silkworms
title_full Obtaining high mechanical performance silk fibers by feeding purified carbon nanotube/lignosulfonate composite to silkworms
title_fullStr Obtaining high mechanical performance silk fibers by feeding purified carbon nanotube/lignosulfonate composite to silkworms
title_full_unstemmed Obtaining high mechanical performance silk fibers by feeding purified carbon nanotube/lignosulfonate composite to silkworms
title_short Obtaining high mechanical performance silk fibers by feeding purified carbon nanotube/lignosulfonate composite to silkworms
title_sort obtaining high mechanical performance silk fibers by feeding purified carbon nanotube/lignosulfonate composite to silkworms
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9060236/
https://www.ncbi.nlm.nih.gov/pubmed/35518113
http://dx.doi.org/10.1039/c8ra09934k
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