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首页> 外文期刊>ACS Sustainable Chemistry & Engineering >Linking Renewable Cellulose Nanocrystal into Lightweight and Highly Elastic Carbon Aerogel
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Linking Renewable Cellulose Nanocrystal into Lightweight and Highly Elastic Carbon Aerogel

机译：将可再生纤维素纳米晶体连接到轻质和高弹性碳气凝胶中

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摘要

Compressible and elastic carbon aerogels with low density, excellent conductivity, high porosity, and chemical stability have attracted much attention in wearable energy storage and sensing devices. However, the mechanical performances of current carbon aerogels are usually limited due to undesirable structural engineering. Herein, an effective and sustainable route is proposed to fabricate a lightweight yet highly elastic carbon aerogel from a renewable nanounit. To realize this aim, mechanically strong cellulose nanocrystal (CNC) serves as the structural unit, while konjac glucomannan (KGM) links CNCs into continuous and orientally aligned layers with a wavy shape. The lamellar architecture and the interaction among CNC and KGM give rise to a lightweight carbon aerogel with ultrahigh structural stability and outstanding mechanical performance that is superior to those of graphene and carbon nanotube (CNT)-based carbon aerogels. Specifically, it can maintain 100% height and 90.6% stress after 10,000 cycles at 50% compression strain. It even can withstand a high compression strain of 90% for 1000 cycles with negligible structure deformation. The unique structure, outstanding mechanical performance, and highly sensitive current response enable the carbon aerogel to accurately detect human biosignals.
机译：具有低密度，优异的导电性，高孔隙度和化学稳定性的可压缩和弹性碳气凝胶在可穿戴能量储存和传感装置中引起了很多关注。然而，由于不希望的结构工程，当前碳气孔的机械性能通常受到限制。在此，提出了一种有效和可持续的途径，以制造从可再生纳米安松区的轻质且高度弹性的碳气泡。为了实现这种目的，机械强的纤维素纳米晶体（CNC）用作结构单元，而Konjac葡甘甘甘油（KGM）将CNC链连接到具有波状形状的连续且朝向对齐的层中。板状架构和CNC和KGM之间的相互作用产生了具有超高结构稳定性和优异的机械性能的轻质碳气体，其优于石墨烯和碳纳米管（CNT）的碳气凝胶。具体地，在50％压缩菌株10,000个循环后，它可以保持100％的高度和90.6％的应力。它甚至可以承受高度压缩应变为1000周期，具有可忽略不计的结构变形。独特的结构，出色的机械性能和高度敏感的电流响应使得碳气凝胶能够准确地检测人体生物功能。

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  • 作者

    Zhuo Hao; Hu Yijie; Chen Zehong; Peng Xinwen; Lai Haihong; Liu Linxiang; Liu Qingzhong; Liu Chuanfu; Zhong Linxin;

  • 作者单位

    South China Univ Technol State Key Lab Pulp &

    Paper Engn Guangzhou 510641 Guangdong Peoples R China;

    South China Univ Technol State Key Lab Pulp &

    Paper Engn Guangzhou 510641 Guangdong Peoples R China;

    South China Univ Technol State Key Lab Pulp &

    Paper Engn Guangzhou 510641 Guangdong Peoples R China;

    South China Univ Technol State Key Lab Pulp &

    Paper Engn Guangzhou 510641 Guangdong Peoples R China;

    South China Univ Technol State Key Lab Pulp &

    Paper Engn Guangzhou 510641 Guangdong Peoples R China;

    South China Univ Technol State Key Lab Pulp &

    Paper Engn Guangzhou 510641 Guangdong Peoples R China;

    South China Univ Technol State Key Lab Pulp &

    Paper Engn Guangzhou 510641 Guangdong Peoples R China;

    South China Univ Technol State Key Lab Pulp &

    Paper Engn Guangzhou 510641 Guangdong Peoples R China;

    South China Univ Technol State Key Lab Pulp &

    Paper Engn Guangzhou 510641 Guangdong Peoples R China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学工业;
  • 关键词

    carbon aerogel; cellulose nanocrystal; konjac glucomannan; pressure sensor; compressible; wearable devices;

    机译：碳气凝胶;纤维素纳米晶体;Konjac Glucomannan;压力传感器;可压缩;可穿戴设备;

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