Dodecyl sulfate-doped polypyrrole derivative grains as a light-responsive liquid marble stabilizer
Dodecyl sulfate-doped polypyrrole derivative grains as a light-responsive liquid marble stabilizer
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DOI：
10.1038/s41428-020-0307-z
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发表时间：
2020-01
期刊：
影响因子：
2.8
通讯作者：
Markéta Šišáková;Yuta Asaumi;Makoto Uda;Musashi Seike;Keigo Oyama;S. Higashimoto;Tomoyasu Hirai;Y. Nakamura;S. Fujii
中科院分区：
文献类型：
--
作者：
Markéta Šišáková;Yuta Asaumi;Makoto Uda;Musashi Seike;Keigo Oyama;S. Higashimoto;Tomoyasu Hirai;Y. Nakamura;S. Fujii
以十二烷基硫酸钠为掺杂剂和疏水剂，采用水相化学氧化聚合法合成了聚吡咯、聚N-甲基吡咯和聚N-乙基吡咯颗粒。所得到的颗粒产品的特征在于它们的大小，形态，表面和散装化学成分，疏水-疏水平衡，（光）热性能，和导电性。扫描电子显微镜研究表明，晶粒是亚微米尺寸的非典型颗粒的聚集体。元素分析和热重分析证实了十二烷基硫酸盐掺杂的聚吡咯、聚N-甲基吡咯和聚N-乙基吡咯材料的生成，并且它们表现出近红外光热光热性能，这一点通过热成像得到了证实。通过X-射线光电子能谱获得的数据表明，十二烷基硫酸盐掺杂剂的存在下的颗粒的表面上。干燥的聚吡咯和聚（N-乙基吡咯）颗粒表现出疏水性，因此，它们可以吸附到空气-水界面，并作为一个光响应的液体大理石稳定剂。近红外激光诱导的Marangoni流可以驱动液体大理石在平面空气-水表面上运动。内部液体的释放可以通过经由外部刺激施加的液体弹珠的受控破裂来实现。
Polypyrrole, poly(N-methyl pyrrole) and poly(N-ethyl pyrrole) grains were synthesized by aqueous chemical oxidative polymerization in the presence of sodium dodecyl sulfate as both a dopant and a hydrophobizing agent. The resulting grain products were characterized in terms of their size, morphology, surface and bulk chemical compositions, hydrophilic–hydrophobic balance, (photo)thermal property, and conductivity. Scanning electron microscopy studies indicated that the grains were aggregates of atypical particles with submicrometer size. Elemental microanalysis and thermogravimetric analysis confirmed the production of dodecyl sulfate-doped polypyrrole, poly(N-methyl pyrrole) and poly(N-ethyl pyrrole) materials, and they showed near-infrared light-to-heat photothermal properties, which was confirmed by thermography. The data obtained through X-ray photoelectron spectroscopy indicated the presence of dodecyl sulfate dopants on the surface of the grains. The dried polypyrrole and poly(N-ethyl pyrrole) grains showed hydrophobic character, and therefore, they can adsorb to the air–water interface and act as a light-responsive liquid marble stabilizer. Locomotion of the liquid marble can be driven by near-infrared laser irradiation-induced Marangoni flow on a planar air–water surface. The release of internal liquid can be achieved by controlled disruption of liquid marbles via external stimulus application.