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首页> 外文会议>PMSE Symposia >Supercritical Carbon Dioxide Processed Nano-clay and Polymer-clay Nanocomposites: Morphological and Rheological Characterization
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Supercritical Carbon Dioxide Processed Nano-clay and Polymer-clay Nanocomposites: Morphological and Rheological Characterization

机译：超临界二氧化碳加工纳米粘土和聚合物 - 粘土纳米复合材料：形态学和流变特征

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摘要

Polymer-clay nanocomposites have significant potential to improve a variety of mechanical, thermal and mass transfer properties and therefore there is much interest in studying methods for producing the best possible enhancement. We explored a novel processing method that utilizes the unique properties of supercritical carbon dioxide (scCO2) to disperse nano-clay and prepare a series of polymer/clay nanocomposites with enhanced properties. Recently, this method has been shown to disperse natural montmorillonite in a polydimethylsiloxane1 and poly(vinylmethylether) matrix with the resultant nanocomposites exhibiting significant rheological improvements over the neat polymer and melt mixed benchmark. It was also shown that certain clays (modifier-dependent) can be exfoliated without any polymer present by soaking in scCO2 followed by catastrophic depressurization . The exfoliated clay could conceivably be co-extruded with the polymer of interest or it can be processed again with the polymer in the presence of scCO2.
机译：聚合物 - 粘土纳米复合材料具有改善各种机械，热和传质性能的显着潜力，因此有利于有利于研究最佳增强的方法。我们探讨了一种新的加工方法，利用超临界二氧化碳（SCCO2）的独特性能分散纳米粘土，并制备一系列具有增强性能的聚合物/粘土纳米复合材料。最近，该方法已经显示出分散在聚二甲基硅氧烷1中的天然蒙脱石和聚（乙烯基甲基醚）基质中，具有所得纳米复合材料，其在整洁的聚合物上具有显着的流变改善和熔融混合基准。还显示出某些粘土（依赖性依赖性）可以在没有通过在SCCO2中浸泡的任何聚合物进行突出的粘土，然后突出灾难性减压。可以认为脱落的粘土可以通过感兴趣的聚合物来调节，或者可以在SCCO 2存在下用聚合物再次加工。

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