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Supercritical carbon dioxide impregnation of gold nanoparticles demonstrates a new route for the fabrication of hybrid silk materials

Singh, Manish LU ; Dey, Estera S. LU ; Bhand, Sunil LU and Dicko, Cedric LU orcid (2022) In Insects 13(1).
Abstract

How many nanoparticles can we load in a fiber? How much will leak? Underlying is the relatively new question of the “space available” in fibers for nanoparticle loading. Here, using supercritical carbon dioxide (scCO2 ) as a carrier fluid, we explored the impregnation in four Indian silks (Mulberry, Eri, Muga, and Tasar) with five standard sizes of gold nanoparticles (5, 20, 50, 100 and 150 nm in diameter). All silks could be permanently impregnated with nanoparticles up to 150 nm in size under scCO2 impregnation. Accompanying structural changes indicated that the amorphous silk domains reorganized to accommodate the gold NPs. The mechanism was studied in detail in degummed Mulberry silk fibers (i.e., without the... (More)

How many nanoparticles can we load in a fiber? How much will leak? Underlying is the relatively new question of the “space available” in fibers for nanoparticle loading. Here, using supercritical carbon dioxide (scCO2 ) as a carrier fluid, we explored the impregnation in four Indian silks (Mulberry, Eri, Muga, and Tasar) with five standard sizes of gold nanoparticles (5, 20, 50, 100 and 150 nm in diameter). All silks could be permanently impregnated with nanoparticles up to 150 nm in size under scCO2 impregnation. Accompanying structural changes indicated that the amorphous silk domains reorganized to accommodate the gold NPs. The mechanism was studied in detail in degummed Mulberry silk fibers (i.e., without the sericin coating) with the 5 nm nanoparticle. The combined effects of concentration, time of impregnation, scCO2 pressure, and temperature showed that only a narrow set of conditions allowed for permanent impregnation without deterioration of the properties of the silk fibers.

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author
; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Nanofiller, Silk, Supercritical carbon dioxide impregnation
in
Insects
volume
13
issue
1
article number
18
publisher
MDPI AG
external identifiers
  • scopus:85121712214
  • pmid:35055861
ISSN
2075-4450
DOI
10.3390/insects13010018
language
English
LU publication?
yes
additional info
Publisher Copyright: © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
id
ed6b5150-f62b-42be-b7f5-87e2eef6b184
date added to LUP
2022-01-27 08:45:20
date last changed
2025-05-05 05:52:39
@article{ed6b5150-f62b-42be-b7f5-87e2eef6b184,
  abstract     = {{<p>How many nanoparticles can we load in a fiber? How much will leak? Underlying is the relatively new question of the “space available” in fibers for nanoparticle loading. Here, using supercritical carbon dioxide (scCO<sub>2</sub> ) as a carrier fluid, we explored the impregnation in four Indian silks (Mulberry, Eri, Muga, and Tasar) with five standard sizes of gold nanoparticles (5, 20, 50, 100 and 150 nm in diameter). All silks could be permanently impregnated with nanoparticles up to 150 nm in size under scCO<sub>2</sub> impregnation. Accompanying structural changes indicated that the amorphous silk domains reorganized to accommodate the gold NPs. The mechanism was studied in detail in degummed Mulberry silk fibers (i.e., without the sericin coating) with the 5 nm nanoparticle. The combined effects of concentration, time of impregnation, scCO<sub>2</sub> pressure, and temperature showed that only a narrow set of conditions allowed for permanent impregnation without deterioration of the properties of the silk fibers.</p>}},
  author       = {{Singh, Manish and Dey, Estera S. and Bhand, Sunil and Dicko, Cedric}},
  issn         = {{2075-4450}},
  keywords     = {{Nanofiller; Silk; Supercritical carbon dioxide impregnation}},
  language     = {{eng}},
  number       = {{1}},
  publisher    = {{MDPI AG}},
  series       = {{Insects}},
  title        = {{Supercritical carbon dioxide impregnation of gold nanoparticles demonstrates a new route for the fabrication of hybrid silk materials}},
  url          = {{http://dx.doi.org/10.3390/insects13010018}},
  doi          = {{10.3390/insects13010018}},
  volume       = {{13}},
  year         = {{2022}},
}