Preparation and Formation Mechanism Analysis of Regenerated Silk Fibroin/Polyvinyl Alcohol Blended Fibers with Waste Silk Quilt 


Vol. 23,  No. 8, pp. 2090-2102, Aug.  2022
10.1007/s12221-022-4035-1


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  Abstract

In the context of environmental protection, the various waste textiles have caused considerable contamination and aroused extensive concern worldwide. This paper used waste silk products to fabricate the regenerated silk fibroin(RSF)/ polyvinyl alcohol(PVA) blended fibers by the dry-wet spinning method. The spinning dope was the 20 wt% RSF/PVA (4/6) blended aqueous solutions, and the coagulation bath was non-toxic and harmless ethanol. We explored fibers microstructure transformation at different spinning stages, forming mechanism, and structure and performance under different spinning parameters. The results showed that as the spinning process progressed, the 棺-sheet structure content and molecular chain orientation of fibers increased gradually from 30.8 % to 48.9 % and from 0.81 to 1.26, respectively. The solution experienced slight shear action in the spinning tube and then coagulated to cylindrical fibers immediately in the coagulation bath. With the extension of coagulation time, the impermeable skin structure and the stable network core structure locked the internal moisture, resulting in a gradually numerous internal pores. The increasing drawing speed ratio could reduce fibers diameter and porosity while the growing coagulation time witnessed an improvement of microstructure. The porosity could be precisely modified. Under the optimum spinning parameters (drawing speed ratio of 1.2 and coagulation time of 60 s), the asspun fibers had the breaking stress, initial modulus, and breaking strain of 0.29짹0.04 cN/dtex, 12.22짹2.55 cN/dtex, and 439짹129 %, respectively. The fibers in this paper have high feasibility for subsequent secondary processing and show broad application prospects in the biomedical field.

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  Cite this article

[IEEE Style]

X. Z. a. Z. Pan, "Preparation and Formation Mechanism Analysis of Regenerated Silk Fibroin/Polyvinyl Alcohol Blended Fibers with Waste Silk Quilt," Fibers and Polymers, vol. 23, no. 8, pp. 2090-2102, 2022. DOI: 10.1007/s12221-022-4035-1.

[ACM Style]

Xin Zhang and Zhijuan Pan. 2022. Preparation and Formation Mechanism Analysis of Regenerated Silk Fibroin/Polyvinyl Alcohol Blended Fibers with Waste Silk Quilt. Fibers and Polymers, 23, 8, (2022), 2090-2102. DOI: 10.1007/s12221-022-4035-1.

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