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通过高通量光显微镜推进olefin聚合催化剂的组成分析

Maximilian J Werny^1,2, Kirsten B Siebers¹, Nicolaas H Friederichs³

¹Inorganic Chemistry and Catalysis Group, Institute for Sustainable and Circular Chemistry and Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584CG Utrecht, The Netherlands.

Journal of the American Chemical Society

|November 8, 2022

概括

聚焦光显微镜提供了一种快速,高通量的方法来分析支持的烯聚合催化剂. 这种技术揭示了催化剂结构和金属分布的显著异质性,影响了聚合性能.

科学领域:

聚合物化学
材料科学
催化剂

背景情况:

优化支持的烯聚合催化剂需要先进的方法来分析它们的组成,结构和形态.
目前的方法可能没有足够的资源效率或高吞吐量来进行全面的催化剂评估.

研究的目的:

开发和应用一种新的高吞吐量方法来评估支持的烯酸聚合催化剂.
量化评估基于金属素的催化剂颗粒的支碎片和异质性.

主要方法:

使用基于实验室的共焦光显微镜分析基于金属的自光催化剂颗粒.
采用先进的图像处理技术进行粒子碎片和异质性的定量评估.
在泥阶段的乙烯聚合过程中对预聚合催化剂颗粒进行2D和3D分析.

主要成果:

在预聚合催化剂颗粒中检测并量化了显著的粒子间和粒子内异质性.
归因于不同支结构和不均的金属分布.
确定了层次的碎片化作为主要机制,并将切割作为次要机制.
在一些粒子中观察到延迟支碎片,可能导致更广泛的粒子大小分布.

结论:

聚焦光显微镜为特异性催化剂提供了可访问和快速的方法.
该方法有效评估光元件和反应产物的分布.
机器学习的自动图像分析可以为催化剂研究和工业质量控制创造一个强大的工具.

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