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相关概念视频

Network Covalent Solids02:18

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Network covalent solids contain a three-dimensional network of covalently bonded atoms as found in the crystal structures of nonmetals like diamond, graphite, silicon, and some covalent compounds, such as silicon dioxide (sand) and silicon carbide (carborundum, the abrasive on sandpaper). Many minerals have networks of covalent bonds.
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相关实验视频

Updated: Jul 11, 2025

Microfluidic-based Synthesis of Covalent Organic Frameworks COFs: A Tool for Continuous Production of COF Fibers and Direct Printing on a Surface
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同价有机框架纳米水凝

Xin Tao1, Zhen Wang1,2, Qing-Pu Zhang1

  • 1College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China.

Journal of the American Chemical Society
|November 8, 2023
PubMed
概括
此摘要是机器生成的。

研究人员通过修改COF用聚N-异烯胺 (PNIPAM) 开发了新的共价有机框架 (COF) 纳米水凝. 这一突破提高了COF在水中的分散性,

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科学领域:

  • 材料科学
  • 聚合物化学
  • 纳米技术

背景情况:

  • 共价有机框架 (COF) 对水性应用具有前景,但实现水分散性仍然是一个重大挑战.
  • 现有的COF分散方法,包括自下而上的合成和自上而下的脱皮,存在局限性.

研究的目的:

  • 设计和合成基于COF的新型纳米水凝 (COF-NHG) 以提高水分散性.
  • 探索这些COF-NHG在水性催化和生物医学应用中的潜力.

主要方法:

  • 在COF支架上的N-异烯胺 (PNIPAM) 的现场原子转移基聚合 (ATRP).
  • 在聚合物生长过程中将散装COF剥离成纳米片.
  • 使用溶液核磁共振和紫外线吸收光谱等技术对COF-NHG进行表征.

主要成果:

  • 成功合成了PNIPAM后修改的COF纳米水凝 (COF-NHG).
  • 在聚合过程中将COF脱皮成纳米片 (侧面尺寸∼500nm,厚度∼6.5nm).
  • 通过PNIPAM的聚合度对COF-NHG大小进行了精确控制.
  • 在水溶液中观察到温度敏感的溶液-凝相转变和保留的内平面结晶性.
  • 已证实在有机溶剂中具有良好的溶解性,用于特性鉴定.

结论:

  • 开发了一种通过纳米水凝制造水分散性COF的新方法.
  • 建立了对COF聚合物复合纳米水凝的刺激反应平台,有可能用于设备应用.
  • 开辟了调节COF溶液可加工性的新途径,并扩大了它们在水环境中的使用.