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首页> 外文期刊>Materials science & engineering >Comparing the properties of Bombyx mori silk cocoons against sericin-fibroin regummed biocomposite sheets
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Comparing the properties of Bombyx mori silk cocoons against sericin-fibroin regummed biocomposite sheets

机译：比较家蚕丝茧对丝胶蛋白调节的生物复合片的性能

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摘要

This paper considers the utility of sericin, a degumming waste product in the regumming of Bombyx mori silk fibroin fibres to form sericin-fibroin biocomposites. Regummed biocomposites have a chemical character that is somewhat closer to fibroin than sericin, though sericin presence is confirmed through FT-IR spectroscopy. Using direct measurements we further find the weight fractions of sericin in the regummed biocomposites and the native cocoons differ by only 5%. Mechanically, B. mori cocoons exhibit brittle stress-strain characteristics, failing at strengths of X-bar = 16.6 MPa and at strains of X-bar = 13%. Contrarily, aligning fibroin fibres to a unidirectional axis in the regummed biocomposites causes them to exhibit characteristics of strain hardening, which is itself a typical characteristic of silk fibre pulled in tension. Though they are half as strong (X-bar = 7.2 MPa), regummed biocomposites are able to absorb five times more mechanical energy (X-bar = 5.6 MJm~(-3)) than the B. mori cocoons (X-bar = 1.1 MJm~(-3)) and are furthermore able to elongate to more than ten times (X-bar = 180%) that of the native cocoons prior to failure. Our research shows that degummed B. mori cocoons can be regummed into sheets that have potential for use as load bearing engineering biocomposites.
机译：本文考虑了丝胶蛋白的用途，丝胶蛋白是一种脱胶废料，用于家蚕丝素蛋白纤维的再胶凝形成丝胶蛋白的生物复合材料。尽管通过FT-IR光谱确认了丝胶蛋白的存在，但归集的生物复合材料的化学特性比丝胶蛋白更接近于丝蛋白。通过直接测量，我们进一步发现在重新配制的生物复合物中丝胶的重量分数与天然茧仅相差5％。机械上，桑蚕茧表现出脆性的应力-应变特性，在X-bar的强度＝ 16.6MPa和X-bar的应变＝ 13％时失效。相反地​​，将纤维蛋白纤维对准再吸收的生物复合材料中的单向轴会导致它们表现出应变硬化的特性，这本身就是拉伸状态下丝纤维的典型特性。尽管它们的强度只有一半（X-bar = 7.2 MPa），但吸收的生物复合材料的机械能（X-bar = 5.6 MJm〜（-3））是桑蚕茧（X-bar = 7.5倍）的五倍。 1.1 MJm〜（-3）），并且能够拉长到失败前天然茧的十倍（X-bar = 180％）。我们的研究表明，脱胶的桑蚕B.蚕茧可再吸收成片状，具有用作承重工程生物复合材料的潜力。

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  • 来源
    《Materials science & engineering》 |2016年第8期|215-220|共6页
  • 作者

    Alexander Morin; Parvez Alam;

  • 作者单位

    Laboratory of Paper Coating and Converting, Centre for Functional Materials, Abo Akademi University, Porthaninkatu 3, 20500 Turku, Finland;

    Laboratory of Paper Coating and Converting, Centre for Functional Materials, Abo Akademi University, Porthaninkatu 3, 20500 Turku, Finland;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Bombyx mori; Degumming; Silk; Biocomposite; Biowaste;

    机译：家蚕;脱胶丝;生物复合材料生物废物;

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