Scholarlink

<p>The increasing demand for electronic products has exacerbated the phenomenon of electromagnetic pollution, which in turn has driven the development of high-performance flexible microwave absorbing materials. Peanut shells, an agricultural waste with an annual output of over 20 million tons worldwide, are traditionally disposed of by incineration or landfilling, which not only wastes carbon resources but also releases pollutants. However, they contain carbon-rich natural polymers and can be converted into carbon materials with high specific surface area and hierarchical pore structure suitable for microwave absorption after pyrolysis. In this work, cotton fabrics were first modified with polydopamine (PDA). Afterwards, the polydimethylsiloxane (PDMS) and porous peanut shell carbon material (KPS) prepared by a green strategy from agricultural waste (peanut shells) were applied to the modified cotton fabric. The prepared fabric showed superhydrophobicity with a water droplet contact angle of 163.7° and exhibited excellent wave-absorbing performance due to the synergistic effect of conduction loss, interfacial polarization loss and surface roughness topography. At a matching thickness of 2.5&#xa0;mm, the minimum reflection loss value reached 47.13&#xa0;dB, and the effective bandwidth covered almost the entire X-band. PDA/KPS/PDMS-Cotton had excellent UV resistance. Its UPF value is 1317.31, and the transmittance of UVA and UVB was 0.11% and 0.06%, respectively. In addition, the obtained cotton fabric was robust enough to withstand damage such as repeated rubbing and still maintained superhydrophobicity and microwave absorption properties. This study showed the construction of hierarchical micro-nano structures for simultaneous uper hydrophobicity and microwave absorption via sustainable utilization of waste biomass, providing a promising and effective way to develop durable and flexible materials with microwave absorption properties.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Superhydrophobic wave-absorbing cotton fabric based on peanut shell porous carbon

  • 期刊论文

  • 发表日期：

    2026年4月17日

查看全文
  • Meiran Dou,
  • Lihui Xu,
  • Tong Xu,
  • Hong Pan,
  • Yingxiu Zhang,
  • Rui Zhang,
  • Yi Teng,
  • Xueqiang Fu,
  • Meng Wang,
  • Qianqian Zhu,
  • Wang Zhongjian

摘要

The increasing demand for electronic products has exacerbated the phenomenon of electromagnetic pollution, which in turn has driven the development of high-performance flexible microwave absorbing materials. Peanut shells, an agricultural waste with an annual output of over 20 million tons worldwide, are traditionally disposed of by incineration or landfilling, which not only wastes carbon resources but also releases pollutants. However, they contain carbon-rich natural polymers and can be converted into carbon materials with high specific surface area and hierarchical pore structure suitable for microwave absorption after pyrolysis. In this work, cotton fabrics were first modified with polydopamine (PDA). Afterwards, the polydimethylsiloxane (PDMS) and porous peanut shell carbon material (KPS) prepared by a green strategy from agricultural waste (peanut shells) were applied to the modified cotton fabric. The prepared fabric showed superhydrophobicity with a water droplet contact angle of 163.7° and exhibited excellent wave-absorbing performance due to the synergistic effect of conduction loss, interfacial polarization loss and surface roughness topography. At a matching thickness of 2.5 mm, the minimum reflection loss value reached 47.13 dB, and the effective bandwidth covered almost the entire X-band. PDA/KPS/PDMS-Cotton had excellent UV resistance. Its UPF value is 1317.31, and the transmittance of UVA and UVB was 0.11% and 0.06%, respectively. In addition, the obtained cotton fabric was robust enough to withstand damage such as repeated rubbing and still maintained superhydrophobicity and microwave absorption properties. This study showed the construction of hierarchical micro-nano structures for simultaneous uper hydrophobicity and microwave absorption via sustainable utilization of waste biomass, providing a promising and effective way to develop durable and flexible materials with microwave absorption properties.