蚕茧废料再生：使用高分子量丝心蛋白的再生纤维实现高强度和高韧性,ACS Sustainable Chemistry & Engineering

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蚕茧废料再生：使用高分子量丝心蛋白的再生纤维实现高强度和高韧性
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2023-02-01 , DOI: 10.1021/acssuschemeng.2c05185
Kenjiro Yazawa _{1,

2} , Kento Nakayama ₁ , Yasuo Gotoh _{2,

3}

Affiliation

当蚕茧被染色或缫成双茧时，蚕茧在工业过程中被去除。此外，世界范围内丢弃了大量用过的丝绸衣服。再生丝素蛋白溶液的人工纺丝是回收丝废料的候选方法。然而，再生丝纤维的机械强度往往低于天然对应物，限制了再生丝纤维的工业应用。家蚕丝素蛋白由重链、轻链和糖蛋白组成。重链的分子量比轻链和糖蛋白高10倍以上。在这项研究中，我们从蚕茧废料中提取重链，并应用人工纺丝技术生产出结构缺陷少的再生丝纤维，旨在获得高拉伸强度。再生丝纤维显示出与天然丝纤维相当的拉伸强度。此外，拉伸弹性模量比天然对应物高 1.7 倍。本研究不仅有助于回收丝绸废料，而且有助于设计高强度蛋白质基结构材料以及可持续发展目标。

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Silkworm Cocoon Waste Revitalization: Regenerated Fibers Using Higher-Molecular-Weight Fibroin Achieve High Strength and Toughness

Silkworm cocoons are removed in the industrial process when the cocoons are stained or reeled as dupion. Furthermore, a tremendous amount of used silk clothes is discarded worldwide. An artificial spinning of regenerated silk fibroin solution is a candidate to recycle silk waste. However, the mechanical strength of the regenerated silk fiber has often been lower than that of the natural counterpart, limiting the industrial use of regenerated silk fibers. Silkworm silk fibroin consists of heavy chains, light chains, and glycoproteins. The molecular weight of the heavy chain is more than 10 times higher than that of the light chain and glycoprotein. In this study, we extracted the heavy chain from the silkworm cocoon waste and applied artificial silk spinning to produce regenerated silk fibers with few structural defects with the aim of obtaining high tensile strength. The regenerated silk fibers revealed tensile strength comparable to the natural silk fibers. Furthermore, the modulus of elasticity in tension was 1.7-fold higher than that of the native counterpart. The present study will contribute not only to recycling silk waste but also to designing high-strength protein-based structural materials along with the context of sustainable development goals.

更新日期：2023-02-01

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