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首页> 外文期刊>Polymers for advanced technologies >The mobility of PEG chains versus micellar stability towards the formation of PE‐b‐PEG nanohybrid shish‐kebab on carbon nanotubes
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The mobility of PEG chains versus micellar stability towards the formation of PE‐b‐PEG nanohybrid shish‐kebab on carbon nanotubes

机译：PEG链与胶束链稳定性朝向碳纳米管上形成PE-B-PEG纳米羊乳丝 - keabbab的迁移率

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摘要

>A comparative study of the effect of copolymer composition on nanohybrid shish‐kebab (NHSK) architecture on carbon nanotubes (CNTs) is presented. A semi‐crystalline amphiphilic di‐block copolymer, polyethylene‐b‐polyethylene glycol (PE‐b‐PEG) was used in this study. Copolymer composition was varied on the basis of the molecular weight of individual copolymers and the ratio between PE and PEG. NHSK structure was characterized using a combination of scanning and transmission electron microscopy. The mobility of PEG, which is determined by its chain length was found to have a significant impact on the periodic decoration of the copolymer on CNTs. With higher chain length or molecular weight, PEG chains provided better stability to micelles formed by the copolymer. Further, PEG assisted micellar stability to create a foundation for PE chains to interact and orient along the tube axis of CNTs as a function of the copolymer composition. It was found that the stability of NHSK architecture can also be changed over time at the same crystallization temperature. This work offers novel and fundamental insights towards the mobility of PEG in the copolymer and its disk‐shaped crystal's formation and micellar stability during crystallization with CNTs. This study provides a better understanding of a mechanically tunable NHSK where the architecture of copolymer crystals can be modified by adjusting the molecular weight of PEG.
机译： 介绍了呈对比研究，介绍了共聚物组合物对碳纳米管（CNT）对纳米喂烤肉串（NHSK）建筑的影响。在该研究中使用半结晶两亲嵌段共聚物，聚乙烯-B-聚乙二醇（PE-B-PEG）。基于单独共聚物的分子量和PE和PEG之间的比例改变共聚物组合物。使用扫描和透射电子显微镜的组合表征NHSK结构。发现PEG的迁移性由其链长确定对CNT上共聚物的周期性装饰产生显着影响。具有较高的链长或分子量，PEG链为由共聚物形成的胶束提供更好的稳定性。此外，PEG辅助胶束稳定性为PE链以CNT的管轴作为共聚物组合物的函数来为PE链形成和定向。发现NHSK架构的稳定性在相同的结晶温度下也可以随时间变化。这项工作提供了在用CNT结晶期间对共聚物和其盘形晶体的形成和胶束稳定性的新颖和基本洞察力。该研究提供了更好地理解机械调谐的NHSK，可以通过调节PEG的分子量来改变共聚物晶体的结构。

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