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相关概念视频

Additives and Fillers in Concrete01:29

Additives and Fillers in Concrete

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Additives and fillers are integral to enhancing the properties of concrete. Pozzolans and blast-furnace slag are additives or admixtures due to their reactions with calcium hydroxide released during cement hydration. Fillers, which are finely ground and similar in fineness to Portland cement, improve concrete attributes such as workability density, and reduce capillary bleeding or cracking. Some fillers possess hydraulic properties or participate in benign reactions within the cement paste.
The...
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通过使用氧化石墨烯添加剂进行模板设计,改善了素的涂料化.

Sandra N Ike1,2, Randy L Vander Wal1,2

  • 1The John and Willie Leone Family Department of Energy and Mineral Engineering, The Pennsylvania State University, State College, Pennsylvania 16801, United States.

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|November 21, 2024
PubMed
概括

石墨烯氧化物和减少的石墨烯氧化物增强了木质素的石墨化. 这种模板制造方法可以产生经济高效的高质量的石墨材料,不需要进行净化.

关键词:
石墨烯氧化物 (GO)图形化 图形化 图形化 图形化红色的线性蛋白质 (lignin) 是一种减少的石墨烯氧化物 (RGO)模板设计 模板设计

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科学领域:

  • 材料科学 材料科学 材料科学
  • 聚合物化学 聚合物化学
  • 纳米技术纳米技术

背景情况:

  • 天然聚合物宁丰富,但很难高效地进行石墨化.
  • 开发具有成本效益和能效的石墨生产方法至关重要.
  • 现有的方法通常需要净化步骤,增加复杂性和成本.

研究的目的:

  • 为了研究石墨烯氧化物 (GO) 和减少石墨烯氧化物 (RGO) 作为模剂用于木质素石墨化.
  • 通过π-π相互作用和潜在的化学结合来探索改进石墨化的机制.
  • 通过一种新的,无净化方法,从素中合成石墨材料.

主要方法:

  • 基衍生的红素被用氧化石墨烯 (GO) 和减少氧化石墨烯 (RGO) 处理.
  • 样品经过高温处理 (2500°C).
  • 描述包括X射线衍射,拉曼光谱和传输电子显微镜.

主要成果:

  • 与纯素相比,在素-GO和素-RGO样本中观察到较好的石墨质量.
  • 通过显微镜和电子衍射证实了有序的纳米结构和多晶体模式.
  • 在GO/RGO模板方便了木质素对齐和石墨化.

结论:

  • 石墨烯氧化物和减少的石墨烯氧化物有效地模拟了木质素的石墨化.
  • 这种方法产生了高质量的石墨材料,具有增强的结构秩序.
  • 该方法为石墨合成提供了一种无净化,潜在更可持续的石墨合成途径.