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相关概念视频

Pore Size Distribution01:23

Pore Size Distribution

92
In concrete, the pore size distribution significantly influences the material's properties. Capillary pores, markedly larger than gel pores, form a vast network within partially hydrated cement paste, reducing the concrete's strength and increasing its permeability. This heightened permeability leads to a greater risk of damage from environmental factors like freeze-thaw cycles and chemical attacks, with the extent of vulnerability also being tied to the water-to-cement ratio.
Adequate...
92

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相关实验视频

Updated: Jun 8, 2025

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孔隙结构调制在基里加米的地质石灰岩伊米达酸框架.

Joohan Nam1, Eunji Jin2, Leila Abylgazina2

  • 1Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea.

Angewandte Chemie (International ed. in English)
|November 6, 2024
PubMed
概括
此摘要是机器生成的。

研究人员发现了一种结晶的氧化伊米达酸框架 (ZIF),它在分子层面上表现出kirigami折叠机制. 这种灵活的ZIF材料展示了独特的压力和客人诱导的反应,揭示了新的可折叠性质.

关键词:
基里加米 (Kirigami) 是一个城市.机械性质 机械性质金属 有机框架毛孔的尺寸性 毛孔的尺寸性石时代的伊米达酸框架

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科学领域:

  • 材料科学 材料科学 材料科学
  • 晶体学 晶体学是指结晶学.
  • 化学工程是化学工程的重要组成部分.

背景情况:

  • 纸工艺品如原纸和基里加米激发了新的科学和工程应用.
  • 基里加米原理可以设计具有独特属性的3D机械连接.
  • 岩性意达酸框架 (ZIF) 是多孔的晶体材料,具有多样化的应用.

研究的目的:

  • 报告一款新的晶体地质地质伊米达酸盐框架 (ZIF) 展现出以kirigami为灵感的折叠机制.
  • 为了研究这种ZIF材料的压力和客人诱导的反应.
  • 在柔性ZIF中揭示分子水平的可折叠力学.

主要方法:

  • 合成一个结晶的极石化伊米达酸框架 (ZIF) 与双波纹表面 (DCS) 图案.
  • 施加压力和客分子以诱导ZIF中的反应.
  • 分析ZIF的机械性能和孔隙维度变化.

主要成果:

  • 该ZIF材料显示了折叠机制与kirigami拼接一致.
  • 在ZIF中的伊米达酸结剂充当分子链,控制孔隙结构.
  • 该ZIF表现出类似于检查适应机械分流器的响应.

结论:

  • 在分子层面上,在灵活的ZIF中发现了一种新的kirigami拼接机制.
  • 这一发现为设计具有可调整机械性能的响应性材料开辟了新的途径.
  • 这项研究强调了kirigami原则在先进材料设计中的潜力.