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首页> 外文期刊>Journal of Applied Polymer Science >Architectural effect of poly(acrylic acid) and poly(amide imide) block copolymers on dispersion of carbon nanotubes in water
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Architectural effect of poly(acrylic acid) and poly(amide imide) block copolymers on dispersion of carbon nanotubes in water

机译：聚丙烯酸和聚酰胺酰胺嵌段共聚物对碳纳米管在水中分散的影响

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摘要

The dispersion of carbon nanotubes (CNTs) in water by poly(acrylic acid) (PAA) and poly(amide imide) (PAI) block copolymers and homo-PAA is investigated. Poly(acrylic acid)-block-poly(amide imide) (PAA-block-PAI), poly(acrylic acid)-block-poly(amide imide)-block-poly(acrylic acid) (PAA-block-PAI-block-PAA), and heteroarm star block copolymer poly(acrylic acid)(2)poly(amide imide) (PAA(2)PAI) with similar molecular weights and PAA contents are used as the copolymers. The dispersion of CNTs is observed by dynamic light scattering and ultraviolet-visible spectroscopy. The presence of the hydrophobic sequence improves the dispersion. PAA(2)PAI has the best dispersion ability, followed in order by PAA-block-PAI-block-PAA, PAA-block-PAI, and homo-PAA. In the dry state, aggregates of CNT are observed by transmission electron microscopy (TEM) in the mixture with PAA-block-PAI and homo-PAA. The adhesion of the copolymers to CNT is also observed by TEM and is due to the high affinity between hydrophobic PAI and CNT. In particular, PAA(2)PAI and PAA-block-PAI-block-PAA well cover the CNTs. The presence of PAI and the PAA location are important for the dispersion of CNTs. (c) 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43461.
机译：研究了聚（丙烯酸）（PAA）和聚（酰胺酰亚胺）（PAI）嵌段共聚物以及均聚PAA在水中分散碳纳米管（CNT）的情况。聚（丙烯酸）-嵌段-聚酰亚胺酰胺（PAA-嵌段-PAI），聚（丙烯酸）-嵌段-聚（酰胺酰亚胺）-嵌段-聚丙烯酸（PAA-嵌段-PAI-嵌段-PAA）和具有相似分子量和PAA含量的杂臂星形嵌段共聚物聚（丙烯酸）（2）聚（酰胺酰亚胺）（PAA（2）PAI）用作共聚物。 CNT的分散通过动态光散射和紫外-可见光谱观察。疏水序列的存在改善了分散性。 PAA（2）PAI具有最佳分散能力，其次是PAA-block-PAI-block-PAA，PAA-block-PAI和homo-PAA。在干燥状态下，通过透射电子显微镜（TEM）在具有PAA-block-PAI和homo-PAA的混合物中观察到CNT的聚集体。还通过TEM观察到共聚物对CNT的粘附，这归因于疏水性PAI和CNT之间的高亲和力。特别地，PAA（2）PAI和PAA-block-PAI-block-PAA很好​​地覆盖了CNT。 PAI和PAA位置的存在对于CNT的分散很重要。 （c）2016 Wiley Periodicals，Inc. J. Appl。 Polym。科学2016，133，43461。

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