Nacre-Inspired Nanocomposites from Natural Polypeptide ε-Poly-l-Lysine and Natural Clay Montmorillonite: Remarkable Reinforcing Effect at Low Polymer Content and Its Mechanism.

IF 5.5 2区化学 Q1 BIOCHEMISTRY & MOLECULAR BIOLOGY

Biomacromolecules Pub Date : 2024-11-11 Epub Date: 2024-10-28 DOI:10.1021/acs.biomac.4c00451

Kazunori Ushimaru, Azusa Togo, Naoto Kamiuchi, Ryota Watanabe, Keita Sakakibara, Yasuko Saito, Akio Kumagai, Shun Sato, Tokuma Fukuoka

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引用次数: 0

Abstract

Nanocomposites composed of the cationic polypeptide ε-poly-l-lysine (ε-PL) and natural sodium montmorillonite (MMT) were prepared and evaluated. These MMT/ε-PL composites formed highly ordered nanostructures resembling natural nacreous layers by a simple process. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) analyses confirmed that a small amount of ε-PL remarkably enhanced the MMT orientation in the composites. This MMT orientation-enhancing effect of ε-PL was more pronounced than that of poly(vinyl alcohol) (PVA), which is one of the most popular ingredients of MMT-based composites. The orientation enhancement provided by ε-PL was primarily driven by ionic interactions and responsible for high mechanical properties at low polymer content. This remarkable reinforcing effect of ε-PL on MMT at a low polymer content will help to develop high-performance and sustainable nacreous composites. In addition, it improves our understanding of the reinforcing mechanism of natural nacre, which exhibits excellent mechanical properties even with relatively small amounts of organic component.

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天然多肽 ε-Poly-l-Lysine 与天然粘土蒙脱石的纳米复合材料：低聚合物含量下的显著增强效果及其机理。

制备并评估了由阳离子多肽ε-聚赖氨酸（ε-PL）和天然蒙脱石钠（MMT）组成的纳米复合材料。通过简单的工艺，这些 MMT/ε-PL 复合材料形成了高度有序的纳米结构，类似于天然珍珠层。扫描电子显微镜（SEM）和 X 射线衍射（XRD）分析证实，少量的 ε-PL 显著增强了复合材料中 MMT 的取向。与聚乙烯醇（PVA）相比，ε-PL 对 MMT 取向的增强作用更为明显，而聚乙烯醇是 MMT 基复合材料中最常用的成分之一。ε-PL的取向增强作用主要是由离子相互作用驱动的，因此在聚合物含量较低的情况下也具有较高的力学性能。在聚合物含量较低的情况下，ε-PL 对 MMT 的明显增强作用将有助于开发高性能和可持续的珍珠质复合材料。此外，它还增进了我们对天然珍珠质的增强机理的了解，即使有机成分含量相对较少，天然珍珠质也能表现出优异的力学性能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Biomacromolecules 化学-高分子科学

CiteScore

10.60

自引率

4.80%

发文量

417

审稿时长

1.6 months

期刊介绍： Biomacromolecules is a leading forum for the dissemination of cutting-edge research at the interface of polymer science and biology. Submissions to Biomacromolecules should contain strong elements of innovation in terms of macromolecular design, synthesis and characterization, or in the application of polymer materials to biology and medicine. Topics covered by Biomacromolecules include, but are not exclusively limited to: sustainable polymers, polymers based on natural and renewable resources, degradable polymers, polymer conjugates, polymeric drugs, polymers in biocatalysis, biomacromolecular assembly, biomimetic polymers, polymer-biomineral hybrids, biomimetic-polymer processing, polymer recycling, bioactive polymer surfaces, original polymer design for biomedical applications such as immunotherapy, drug delivery, gene delivery, antimicrobial applications, diagnostic imaging and biosensing, polymers in tissue engineering and regenerative medicine, polymeric scaffolds and hydrogels for cell culture and delivery.