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相关概念视频

Network Covalent Solids02:18

Network Covalent Solids

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.
To break or to melt a covalent network solid, covalent bonds must be broken. Because covalent bonds are relatively strong, covalent network solids are typically...

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Scalable Syntheses of Graphene Oxide and Reduced Graphene Oxide using Cascade Design Oxidation and Highly Basic Reduction Reactions
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在接口处的石墨烯氧化物板.

Jaemyung Kim1, Laura J Cote, Franklin Kim

  • 1Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208, USA.

Journal of the American Chemical Society
|June 10, 2010
PubMed
概括
此摘要是机器生成的。

石墨烯氧化物 (GO) 板是两性质的,作为表面活性剂,具有爱水和厌水的区域. 这种根据pH值和尺寸调节的特性,可用于稳定的乳液和材料加工.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 表面化学 表面化学
  • 体科学 体科学 体科学

背景情况:

  • 从石墨中提取的氧化石墨烯 (GO) 传统上被认为是水友性.
  • 它在水中的优异的合稳定性支持了这一观点.
  • 然而,需要对其界面行为有更深入的了解.

研究的目的:

  • 为了研究石墨烯氧化物 (GO) 板的界面特性.
  • 为了确定GO是否表现出两性特征.
  • 探索影响GO两性及其潜在应用的因素.

主要方法:

  • 在接口上的吸附性研究.
  • 测量表面和界面张力.
  • 根据pH值和大小对GO行为进行表征.
  • 乳液稳定性测试 (皮克林乳液).

主要成果:

  • 石墨烯氧化物 (GO) 板表现出两性行为,具有水友边缘和水基底平面.
  • GO有效地降低了表面和表面间的张力,作为表面活性剂.
  • GO的两性可以通过pH调节,并且取决于板块大小.
  • GO形成高度稳定的皮克林乳液,并作为不溶性材料的分子分散剂.

结论:

  • 石墨烯氧化物 (GO) 是一种两性动物,挑战了以前对其水友性的看法.
  • 它的双分子合性和可调的两性为先进的材料加工和配方提供了巨大的潜力.
  • 的表面活性特性为创建稳定的乳液和分散具有挑战性的材料开辟了新的途径.