Production of fine powder from silk by radiation

Takeshita, Hidefumi; Ishida, Kazushige; Kamiishi, Youichi; Yoshii, Fumio; Kume, Tamikazu

doi:10.1002/1439-2054(20001101)283:1<126::aid-mame126>3.0.co;2-#

Cited by 40 publications

(17 citation statements)

References 5 publications

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“…However, 100% regenerated silk fiber has not been industrially produced because no proper spinning technology has been developed 1, 2. So that its properties are retained, silk is widely produced in a powder form by different methods 2–6. Silk fibroin powder has already found utility in cosmetic materials and functional foods.…”

Section: Introductionmentioning

confidence: 99%

“…To get a fine silk powder, usually silk fibroin powders are produced by a special chemical pretreatment to destroy the chemical bonds and reduce the crystallinity 5. High‐energy irradiation has also been used to destroy the crystals 4. After the pretreatment, silk fibroin fibers are dissolved in an aqueous calcium chloride solution at a high temperature, and this is followed by a dialysis treatment to remove the salt; they are then dehydrated, dried, and pulverized to yield a fine fibroin powder 6–8.…”

Section: Introductionmentioning

confidence: 99%

“…In this study, a superfine down powder was produced with the developed method. It was much finer than some other organic powders, such as silk powder and ramie powder, which has been developed by some other researchers and mostly has an average size around 5–10 μm 3–6. The color of the down fiber powder is white because the powder is produced at room temperature.…”

Section: Introductionmentioning

confidence: 99%

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Characterization of superfine down powder

Wang

Cui

et al. 2008

J of Applied Polymer Sci

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Superfine down powder was produced from down fiber after it was cut into short pieces and ground on a purpose-built machine. Scanning electron microscopy photographs showed that the down fiber was ground into particles with some fiber fragments and a large amount of rod-shaped ultrafine powder. Particle size distribution analysis indicated that the average size of the down powder was 1.546 lm. Fourier transform infrared analysis showed that the absorbing peaks around 1640, 1520, and 1230 cm À1 were sharper than those of the down fiber. X-ray diffraction analysis revealed that the crystallinity of the superfine down powder was a little lower than that of the down fiber. Thermogravimetric analysis showed that the thermal stability decreased when the down fiber was ground into powder. Differential scanning calorimetry analysis showed that the intensity of the heatabsorbing peaks of the down powder was lower than that of the down fiber, so the down powder decomposed more readily than the down fiber.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Characterization of superfine down powder

Wang

Cui

et al. 2008

J of Applied Polymer Sci

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“…However, material properties depend not only on the macromolecule but also on the structurethe way the macromolecule is put together [2][3][4][5][6]. Silk fibroin powder has already found its utility as cosmetic materials and functional foods.…”

Section: Introductionmentioning

confidence: 99%

Characterization and functions of Nano-Wool crystallites

Wu¹,

Yan²,

Xu³

et al. 2012

Proceedings of the 2nd International Conference on Electronic and Mechanical Engineering and Information Technology (2012)

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In the research, we reported on a new method to produce fine wool protein crystallites by regeneration method, and this kind protein emulsion can be used on the treatment of fabrics, synthetic or nature fibers, allowing to form protein sheath or encapsulation layer that do not disturb the original properties and adding additional functions. From the structure analysis, it was showed that the particle size of the protein is below 100nm and micro-morphology being ball-like in appearance. There exists mixed crystalline morphology, single-and multi-crystal , in the nano-wool protein crystallites and it also showed higher crystalline degree (crystallinity) than original wool materials. And, cotton woven fabric treated with this kind nano materials by simply method , exhibits several unique features and after standard washing, these functions still remained .

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“…Mulberry silks have excellent properties such as good tensile strength, high elongation, and moisture regain and are extensively used for textile, medical, and biotechnology applications [1,[4][5][6][7]. Although wild silks generally have inferior properties than B. mori silk, wild silks are reared for commercial silk production due to their unique properties and also to provide employment and income to native habitants where these cocoons are found [8,9].…”

Section: Introductionmentioning

confidence: 99%

Structure and properties of ultrafine silk fibers produced by Theriodopteryx ephemeraeformis

Reddy

Yang

2010

J Mater Sci

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Theriodopteryx ephemeraeformis commonly known as bag worms produce ultrafine silk fibers that are remarkably different than the common domesticated (Bombyx mori) and wild (Saturniidae) silk fibers. Bag worms are considered as pests and commonly infect trees and shrubs. Although it has been known that the cocoons (bags) produced by bag worms are composed of silk, the structure and properties of the silk fibers in the bag worm cocoons have not been studied. In this research, the composition, morphology, physical structure, thermal stability, and tensile properties of silk fibers produced by bag worms were studied. Bag worm silk fibers have considerably different amino acid contents from those of the common silks. The physical structure of the bag worm silk fibers is also considerably different compared with B. mori and common wild silk fibers. Bag worm's silk fibers have lower tensile strength (3.2 g/denier) and Young's modulus (45 g/denier) but similar breaking elongation (15.3%) compared with B. mori silk. However, the tensile strength and Young's modulus of bag worm fibers are similar to those of the common Saturniidae wild silk fibers. Bag worm silk fibers could be useful for some of the applications currently using the B. mori and wild silk fibers.

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Production of fine powder from silk by radiation

Cited by 40 publications

References 5 publications

Characterization of superfine down powder

Characterization of superfine down powder

Characterization and functions of Nano-Wool crystallites

Structure and properties of ultrafine silk fibers produced by Theriodopteryx ephemeraeformis

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