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Template-Directed Polymerization Strategy for Producing rGO/UHMWPE Composite Aerogels with Tunable Properties
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2023-01-17 , DOI: 10.1021/acsami.2c19649 Maksim V Gudkov 1 , Peter N Brevnov 1 , Maxim K Rabchinskii 2 , Marina V Baidakova 2 , Dina Yu Stolyarova 3 , Grigorii A Antonov 2 , Maria A Yagovkina 2 , Natalia G Ryvkina 1 , Sergey L Bazhenov 1 , Alexander A Gulin 1 , Kseniya A Shiyanova 1 , Georgy S Peters 3 , Vadim G Krasheninnikov 1 , Yegor D Ryabkov 4 , Galina P Goncharuk 5 , Arkady Ya Gorenberg 1 , Lyudmila A Novokshonova 1 , Valery P Melnikov 1
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2023-01-17 , DOI: 10.1021/acsami.2c19649 Maksim V Gudkov 1 , Peter N Brevnov 1 , Maxim K Rabchinskii 2 , Marina V Baidakova 2 , Dina Yu Stolyarova 3 , Grigorii A Antonov 2 , Maria A Yagovkina 2 , Natalia G Ryvkina 1 , Sergey L Bazhenov 1 , Alexander A Gulin 1 , Kseniya A Shiyanova 1 , Georgy S Peters 3 , Vadim G Krasheninnikov 1 , Yegor D Ryabkov 4 , Galina P Goncharuk 5 , Arkady Ya Gorenberg 1 , Lyudmila A Novokshonova 1 , Valery P Melnikov 1
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In this paper, we suggest a previously unknown template-directed polymerization strategy for producing graphene/polymer aerogels with elevated mechanical properties, preservation of the nanoscale pore structure, an extraordinary crystallite structure, as well as tunable electrical and hydrophobic properties. The suggested approach is studied using the reduced graphene oxide (rGO)/ultrahigh molecular weight polyethylene (UHMWPE) system as an example. We also develop a novel method of ethylene polymerization with formation of UHMWPE directly on the surface of rGO sheets prestructured as the aerogel template. At a UHMWPE content smaller than 20 wt %, composite materials demonstrate completely reversible deformation and good conductivity. An ultrahigh polymer content (more than 80 wt %) results in materials with pronounced plasticity, improved hydrophobic properties, and a Young’s modulus that is more than 200 times larger than that of pure rGO aerogel. Variation of the polymer content makes it possible to tune the electro-conductive properties of the aerogel in the range from 4.8 × 10–6 to 4.9 × 10–1 S/m and adjust its hydrophobic properties. The developed approach would make it possible to create composite materials with highly developed nanostructural morphology and advanced properties controlled by the thickness of the polymer layer on the surface of graphene sheets.
中文翻译：
用于生产具有可调性能的 rGO/UHMWPE 复合气凝胶的模板导向聚合策略
在本文中，我们提出了一种以前未知的模板导向聚合策略，用于生产具有更高机械性能、纳米级孔结构保存、非凡微晶结构以及可调电和疏水性能的石墨烯/聚合物气凝胶。以还原氧化石墨烯 (rGO)/超高分子量聚乙烯 (UHMWPE) 系统为例，对建议的方法进行了研究。我们还开发了一种新的乙烯聚合方法，直接在预结构化为气凝胶模板的 rGO 片材表面形成 UHMWPE。当 UHMWPE 含量小于 20 wt% 时，复合材料表现出完全可逆的变形和良好的导电性。超高聚合物含量（超过 80 wt%）导致材料具有明显的可塑性，改进的疏水性，以及比纯 rGO 气凝胶大 200 倍的杨氏模量。聚合物含量的变化使得可以在 4.8 × 10 范围内调节气凝胶的导电性能–6至 4.9 × 10 –1 S/m 并调整其疏水性能。开发的方法将有可能创造出具有高度发达的纳米结构形态和先进性能的复合材料，这些材料由石墨烯片表面聚合物层的厚度控制。
更新日期：2023-01-17
中文翻译：
用于生产具有可调性能的 rGO/UHMWPE 复合气凝胶的模板导向聚合策略
在本文中，我们提出了一种以前未知的模板导向聚合策略，用于生产具有更高机械性能、纳米级孔结构保存、非凡微晶结构以及可调电和疏水性能的石墨烯/聚合物气凝胶。以还原氧化石墨烯 (rGO)/超高分子量聚乙烯 (UHMWPE) 系统为例，对建议的方法进行了研究。我们还开发了一种新的乙烯聚合方法，直接在预结构化为气凝胶模板的 rGO 片材表面形成 UHMWPE。当 UHMWPE 含量小于 20 wt% 时，复合材料表现出完全可逆的变形和良好的导电性。超高聚合物含量（超过 80 wt%）导致材料具有明显的可塑性，改进的疏水性，以及比纯 rGO 气凝胶大 200 倍的杨氏模量。聚合物含量的变化使得可以在 4.8 × 10 范围内调节气凝胶的导电性能–6至 4.9 × 10 –1 S/m 并调整其疏水性能。开发的方法将有可能创造出具有高度发达的纳米结构形态和先进性能的复合材料，这些材料由石墨烯片表面聚合物层的厚度控制。
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