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相关概念视频

Volatilization01:10

Volatilization

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Volatilization gravimetry is an analytical technique that measures the mass lost due to the volatilization of the substance. This technique is used to estimate the amount of volatile material in a sample. To perform this method, heat a known amount of the sample to a high temperature in a crucible or other suitable vessel. The volatile substance in the sample evaporates, and the vapor is completely expelled from the crucible either by heating the sample or bubbling a stream of inert gas through...
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Gas Chromatography: Types of Detectors-II01:19

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In gas chromatography, different detectors are employed to meet specific analytical needs. These detectors are often categorized based on their detection mechanisms and the types of compounds they are best suited to analyze. Thermal Conductivity Detectors (TCD), Flame Ionization Detectors (FID), and Electron Capture Detectors (ECD) represent common categories, each with unique operating principles and applications. However, beyond these, several other detectors are designed for more specialized...
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相关实验视频

Updated: May 5, 2026

Characterization, Quantification and Compound-specific Isotopic Analysis of Pyrogenic Carbon Using Benzene Polycarboxylic Acids BPCA
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用有挥发性有机化合物的聚合物囊作为受控排放的参考材料.

Anna Musyanovych1, Christoph Grimmer2, Ali Enis Sadak3

  • 1Fraunhofer IMM, Carl Zeiss Str. 18-20, 55129 Mainz, Germany.

ACS applied materials & interfaces
|December 4, 2024
PubMed
概括

研究人员开发了聚氨/聚尿素微囊,用于控制挥发性有机化合物 (VOC) 释放,创造了潜在的排放参考材料 (ERM). 装有烯的微囊显示出稳定的排放率,显示出ERM应用的前景.

关键词:
排放测试是指排放测试.膜乳化乳化方式多添加的多添加.聚合物的微囊.挥发性有机化合物 (VOC) 是一种挥发性有机化合物.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 化学工程是化学工程的重要组成部分.
  • 环境科学 环境科学

背景情况:

  • 挥发性有机化合物 (VOC) 的控制释放对于排放参考材料 (ERM) 至关重要.
  • 开发稳定的微囊,以保持稳定的VOC蒸发是一个重大挑战.

研究的目的:

  • 合成和描述用于封装VOCs的聚氨/聚氨微囊.
  • 评估这些微囊作为排放参考材料的潜力.

主要方法:

  • 使用Shirasu多孔玻璃膜乳化进行界面聚合.
  • 在微囊配方中优化表面活性剂,VOC和单体比率.
  • 使用显微镜 (光学,SEM),FTIR和TGA进行表征.
  • 根据EN 16516标准进行排放测试.

主要成果:

  • 成功生产了含有有烯,烯和烯等挥发性有机化合物的微囊 (10-50微米).
  • 封装效率因挥发性有机物特性而异 (54-7重量%).
  • 经过优化后的微囊呈现出球形,核心外结构和尿-尿素键.
  • 利蒙微囊在14天内显示出<10%的排放率变化.

结论:

  • 聚氨/聚氨基urea微囊是有效的封装VOCs.
  • 优化的微囊表现出稳定性和受控释放性能.
  • 装有烯的微囊显示出作为可靠的排放参考材料的潜力.