Two‐Stage Depressurization in Gas Dissolution Foaming: The Production of Nanocellular Materials Free of Defects,Macromolecular Materials and Engineering

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Two‐Stage Depressurization in Gas Dissolution Foaming: The Production of Nanocellular Materials Free of Defects
Macromolecular Materials and Engineering ( IF 4.2 ) Pub Date : 2020-08-11 , DOI: 10.1002/mame.202000283
Judith Martín‐de León ₁ , Victoria Bernardo ₁ , Miguel Ángel Rodríguez‐Pérez ₁

Affiliation

Nanocellular polymethylmethacrylate (PMMA) is produced through a newly proposed method, a two‐stage depressurization in the gas dissolution foaming process. This method modifies the depressurization step and allows controlling the pressure during cell growth, avoiding this way, the appearance of micrometric defects in the produced cellular materials. Three grades of PMMA, as well as different production parameters, are tested in order to study their influence on the final materials. Moreover, cellular structures are compared with those obtained with a one‐stage depressurization process. Additionally, this work analyzes the foaming mechanisms taking place during the production of nanocellular materials.

中文翻译：

气体溶解发泡过程中的两级减压：无缺陷的纳米细胞材料的生产

纳米孔聚甲基丙烯酸甲酯（PMMA）是通过一种新提出的方法生产的，该方法在气体溶解发泡过程中分为两步减压。该方法改变了减压步骤，并允许在细胞生长过程中控制压力，从而避免了所产生的细胞材料中出现微观缺陷。测试了三个等级的PMMA以及不同的生产参数，以研究它们对最终材料的影响。此外，将细胞结构与通过一级减压过程获得的结构进行了比较。此外，这项工作分析了纳米细胞材料生产过程中发生的起泡机理。

更新日期：2020-09-14

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