使用含有木质素磺酸钙、碳纳米管和石墨烯的合成蚕饲料生产蜘蛛丝状纤维的蚕,ACS Omega

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使用含有木质素磺酸钙、碳纳米管和石墨烯的合成蚕饲料生产蜘蛛丝状纤维的蚕
ACS Omega ( IF 3.7 ) Pub Date : 2019-03-05 00:00:00 , DOI: 10.1021/acsomega.8b03566
Xiaoli Zhang ₁ , Ana Laura Licon ₁ , Thomas I Harris ₁ , Paula F Oliveira ₁ , Bailey J McFarland ₁ , Blake E Taurone ₁ , Brittney J Walsh ₁ , Brianne E Bell ₁ , Caleb T Walker ₁ , Randolph V Lewis ₁ , Justin A Jones ₁

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蚕丝与材料应用的关系越来越密切。然而，由于大规模生产的问题，整个行业正在退缩。关键问题之一是丝绸的性能不一致。提高蚕丝材料性能的一种方法是通过改进养蚕技术。一种可能的技术是改变蚕的饲料，添加单壁碳纳米管（SWNT）或石墨烯（GR）。最近发表的结果表明纤维机械性能得到了显着改善。然而，与普通蚕丝相比，用于将这些材料掺入饲料中的表面活性剂对纤维机械性能的影响尚未研究或报道。因此，在表面活性剂存在下饲喂 SWNT 和 GR 对蚕的总体影响尚不清楚。我们的研究重点是表面活性剂[木质素磺酸钙（LGS）]，并表明与未经处理的蚕丝相比，仅它就可以显着改善机械性能。此外，我们的研究表明，将 LGS、SWNT 和 GR 直接混合到蚕的人工饲料中可以改善机械性能，而不会低于高剂量 SWNT 或 GR 的对照丝。综上所述，我们提供的证据表明，将表面活性剂（在本例中为 LGS）直接与蚕的饮食混合可产生拉伸强度超过 1 GPa 的高质量纤维产品。添加纳米碳（SWNT 或 GR）后，改进会更大，并且始终超过对照纤维。然而，单独饲喂LGS是持续提高蚕纤维机械性能的更经济实用的选择。

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Silkworms with Spider Silklike Fibers Using Synthetic Silkworm Chow Containing Calcium Lignosulfonate, Carbon Nanotubes, and Graphene

Silkworm silk has become increasingly relevant for material applications. However, the industry as a whole is retracting because of problems with mass production. One of the key problems is the inconsistent properties of the silk. A means by which to improve the silk material properties is through enhanced sericulture techniques. One possible technique is altering the feed of the silkworms to include single-wall carbon nanotubes (SWNTs) or graphene (GR). Recently published results have demonstrated substantial improvement in fiber mechanical properties. However, the effect of the surfactant used to incorporate those materials into the feed on the fiber mechanical properties in comparison to normal silkworm silk has not been studied or reported. Thus, the total effect of feeding the SWNT and GR in the presence of surfactants on silkworms is not understood. Our study focuses on the surfactant [calcium lignosulfonate (LGS)] and demonstrates that it alone results in appreciable improvement of mechanical properties in comparison to nontreated silkworm silk. Furthermore, our study demonstrates that mixing the LGS, SWNT, and GR directly into the artificial diet of silkworms yields improved mechanical properties without decline below the control silk at high doses of SWNT or GR. Combined, we present evidence that mixing surfactants, in this case LGS, directly with the diet of silkworms creates a high-quality fiber product that can exceed 1 GPa in tensile strength. With the addition of nanocarbons, either SWNT or GR, the improvement is even greater and consistently surpasses control fibers. However, feeding LGS alone is a more economical and practical choice to consistently improve the mechanical properties of silkworm fiber.

更新日期：2019-03-05

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