首页    期刊浏览 2024年12月04日 星期三
登录注册

文章基本信息

  • 标题:Intrinsically reversible superglues via shape adaptation inspired by snail epiphragm
  • 本地全文:下载
  • 作者:Hyesung Cho ; Hyesung Cho ; Gaoxiang Wu
  • 期刊名称:Proceedings of the National Academy of Sciences
  • 印刷版ISSN:0027-8424
  • 电子版ISSN:1091-6490
  • 出版年度:2019
  • 卷号:116
  • 期号:28
  • 页码:13774-13779
  • DOI:10.1073/pnas.1818534116
  • 出版社:The National Academy of Sciences of the United States of America
  • 摘要:Adhesives are ubiquitous in daily life and industrial applications. They usually fall into one of two classes: strong but irreversible (e.g., superglues) or reversible/reusable but weak (e.g., pressure-sensitive adhesives and biological and biomimetic surfaces). Achieving both superstrong adhesion and reversibility has been challenging. This task is particularly difficult for hydrogels that, because their major constituent is liquid water, typically do not adhere strongly to any material. Here, we report a snail epiphragm-inspired adhesion mechanism where a polymer gel system demonstrates superglue-like adhesion strength (up to 892 N⋅cm−2) that is also reversible. It is applicable to both flat and rough target surfaces. In its hydrated state, the softened gel conformally adapts to the target surface by low-energy deformation, which is locked upon drying as the elastic modulus is raised from hundreds of kilopascals to ∼2.3 GPa, analogous to the action of the epiphragm of snails. We show that in this system adhesion strength is based on the material’s intrinsic, especially near-surface, properties and not on any near-surface structure, providing reversibility and ease of scaling up for practical applications.
  • 关键词:polymer gels ; superstrong adhesion ; shape adaptation ; intrinsically reversible ; snail epiphragm
国家哲学社会科学文献中心版权所有