A Study on Ultrasonic Technology in Silk Degumming

Cai, Yingjie; Ge, Hua; Liu, Jin Qiang

doi:10.4028/www.scientific.net/amr.441.122

Cited by 5 publications

(3 citation statements)

References 5 publications

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“…Vyas et al [41] and Cai et al [42] performed ultrasonicationassisted silk degumming treatment in the presence of different degumming agents. This method has the advantages of short processing time and uniform degummed silk fi bers.…”

Section: Degumming Of Raw Silkmentioning

confidence: 99%

Review on Fabrication and Application of Regenerated Bombyx mori Silk Fibroin Materials

Wang

Zhou

et al. 2023

AUTEX Research Journal

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Natural silk fiber derived from the Bombyx mori (B. mori) silkworm has long been used as a luxury raw material in textile industry because of its shimmering appearance and durability, and as surgical suture for its high strength and flexibility. Regenerated silk fibroin, as the main protein extracted from the cocoons of the B. mori silkworm, recently has gained considerable attention due to its outstanding properties, including facile processability, superior biocompatibility, controllable biodegradation, and versatile functionalization. Tremendous effort has been made to fabricate silk fibroin into various promising materials with controlled structural and functional characteristics for advanced utilities in a multitude of biomedical applications, flexible optics, electronics devices, and filtration systems. Herein, reverse engineered silk fibroin extraction methods are reviewed, recent advances in extraction techniques are discussed. Fabrication methods of silk fibroin materials in various formats are also addressed in detail; in particular, progress in new fabrication technologies is presented. Attractive applications of silk fibroin-based materials are then summarized and highlighted. The challenges faced by current approaches in production of silk fibroin-based materials and future directions acquired for pushing these favorable materials further toward above mentioned applications are further elaborated.

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Section: Degumming Of Raw Silkmentioning

confidence: 99%

Review on Fabrication and Application of Regenerated Bombyx mori Silk Fibroin Materials

Wang

Zhou

et al. 2023

AUTEX Research Journal

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“…Cai et al . used anhydrous sodium carbonate and particular penetrant materials with ultrasonics to degum silk.…”

Section: Introductionmentioning

confidence: 95%

A comparative study of ultrasonic degumming of silk sericin using citric acid, sodium carbonate and papain

Wang

Pan

Gong

et al. 2019

Coloration Technology

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The utilisation of ultrasonics has been shown to enable efficient and environmentally friendly textile wet processing. This study conducted a comparative investigation of silk degumming by using a conventional heating bath and ultrasonic irradiation at a range of ultrasonic frequencies. Citric acid, sodium carbonate and papain were used as degumming agents. Sericin degumming rate, fibre whiteness, fibre surface morphology, fibre structure characteristics and fibre tensile properties were measured and analysed. Results showed that ultrasonics at a lower frequency produced a greater degumming rate than at a higher frequency. Ultrasonics is a more effective way than the conventional heating bath of improving degumming efficiency, especially at a lowered temperature of 60°C. When sodium carbonate was applied at 90°C, a conventional heating bath was found to be more effective than ultrasonics. Papain was found to be more effective in sericin removal than citric acid and sodium carbonate, with a degumming rate of 22% achieved at 60°C under ultrasonic irradiation at 40 kHz. The use of papain can, however, cause a possible overreaction to silk under certain severe conditions, resulting in a loss of fibre whiteness. Negligible changes in fibre structure characteristics were measured by Fourier Transform-infrared spectroscopy and X-ray diffraction after ultrasonic degumming with papain. Slightly reduced fibre strength and increased fibre extensibility were observed in ultrasonically degummed silk samples compared with un-degummed and conventionally degummed silk samples.

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“…Chemical degumming with sodium carbonate (Na 2 CO 3 ) is the most widely used method because of its high percentage of removed sericin 1 ; however, this process is energy-consuming, and the SS contained in the degumming wastewater is difficult to recover. Alternative degummed processes, such as autoclave, microwave or ultrasonication process, are considered more environmentally friendly as they reduce chemical waste and allow for silk sericin recovery compared to traditional chemical processes 2 – 4 . According to some estimates, the energy demand in the silk textile process is approximately 1800 MJ per kilogram of fiber, which is significantly higher than that required for other fibers, such as nylon or cotton yarn.…”

Section: Introductionmentioning

confidence: 99%

Silk wastes and autoclaved degumming as an alternative for a sustainable silk process

Gaviria,

Jaramillo-Quiceno,

Motta

et al. 2023

Sci Rep

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Silk degumming is considered the first point in the preparation of silk-based materials since this process could modify the silk fiber and the properties of its related products. This study evaluated the differences in morphology, secondary structure, amino acid content, thermal stability, and mechanical properties of two types of raw materials, defective cocoons (DC) and silk fibrous waste (SW), degummed by chemical (C) and autoclaving (A) methods. Subsequently, silk fibroin films were prepared by dissolving each type of degummed fibers, and thermal and structural films properties were determined. The findings demonstrated that autoclaving is an efficient alternative to remove silk sericin, as the resulting fibers presented improved structural, thermal, and mechanical properties compared to those obtained by the chemical method. For films preparation, autoclave resulted in a good option, but dissolution parameters need to be adjusted for defective cocoons. Furthermore, similarities between the physicochemical properties of fibers and films from both fibrous wastes suggest that SW is a promising raw material for producing fibrous resources and regenerated silk fibroin materials. Overall, these findings suggest new recycling methods for fibrous waste and by-products generated in the silk textile production process.

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A Study on Ultrasonic Technology in Silk Degumming

Cited by 5 publications

References 5 publications

Review on Fabrication and Application of Regenerated Bombyx mori Silk Fibroin Materials

Review on Fabrication and Application of Regenerated Bombyx mori Silk Fibroin Materials

A comparative study of ultrasonic degumming of silk sericin using citric acid, sodium carbonate and papain

Silk wastes and autoclaved degumming as an alternative for a sustainable silk process

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