Dispersing carbon nanotubes by chiral network surfactants.
Dispersing carbon nanotubes by chiral network surfactants.
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DOI：
10.1021/acsami.5b00168
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发表时间：
2015-03
影响因子：
9.5
通讯作者：
Pengcheng Lin;Yue‐hua Cong;Bao‐yan Zhang
中科院分区：
文献类型：
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作者：
Pengcheng Lin;Yue‐hua Cong;Bao‐yan Zhang
手性网络表面活性剂（CNSs）具有与碳纳米管（CNTs）和手性材料相混溶的性质，用于分散碳纳米管。采用紫外-可见吸收光谱定量测定均相CNT- cns分散体系中的CNT浓度，结果表明，多环共轭结构摩尔分数越多的cnns负载和分散CNTs的能力越好，最大浓度达到0.79 mg mL（-1）。利用傅里叶变换红外成像系统对CNTs -CNS复合材料中CNTs的分散性进行了分析，发现含6 mol %非媒质（S6）的CNS具有最佳的分散性。CNT掺杂后的CNSs玻璃化转变温度降低，热稳定性增强，热致变色温度降低，反射颜色丰富。此外，利用S6作为启动子分散碳纳米管在手性宿主体内，本文选择了一种左手手性液晶（CLC），通过偏光显微镜研究了CNTs与CLC的混相性，S6可以有效地分散碳纳米管在CLC中。碳纳米管分散的碳纳米管比纯碳纳米管具有更快的电光响应过程。
Chiral network surfactants (CNSs) possessing miscibility with carbon nanotubes (CNTs) and chiral materials are applied to disperse CNTs. Ultraviolet-visible absorption spectroscopy is used to quantitatively determine the CNT concentration in homogeneous CNT-CNS dispersions, results indicate that CNSs with more mole fraction of polycyclic conjugated structure have better ability to load and disperse CNTs and the maximal concentration reaches 0.79 mg mL(-1). Fourier transform infrared imaging system is utilized to analyze the dispersibility of CNTs in CNT-CNS composites, and CNS with 6 mol % nonmesogens (S6) induces the best dispersibility. The CNT doped CNSs exhibit lower glass transition temperature, strengthened thermal stability, decreased the thermochromic temperature and enriched reflected colors of CNSs. Furthermore, S6 are used as a promoter to disperse CNTs in chiral host, here, a left-handed chiral liquid crystal (CLC) is selected, the miscibility between CNTs and CLCs is studied by polarized optical microscope, and CNTs can be effectively dispersed in CLCs by S6. The CNT dispersed CLCs can exhibit a faster electro-optical response process than neat CLCs.