Efficient Production of Single‐Walled Carbon Nanotube Aqueous Dispersion Using Hexahydroxytriphenylene as a Dispersant and Stabilizer,ChemistrySelect

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Efficient Production of Single‐Walled Carbon Nanotube Aqueous Dispersion Using Hexahydroxytriphenylene as a Dispersant and Stabilizer
ChemistrySelect ( IF 1.9 ) Pub Date : 2018-06-11 , DOI: 10.1002/slct.201800473
Gang Liu _{1,

2} , Neng Liu ₁ , Alejandro López-Moreno ₂ , Ping Zhao ₁ , Wubin Dai ₁ , Shengwei Shi ₁ , Naoki Komatsu ₂

Affiliation

Dispersing single‐walled carbon nanotubes (SWNTs) is one of the key technologies for promoting the practical application of SWNTs in many fields. Herein, we report on an efficient dispersant, 2,3,6,7,10,11‐hexahydroxytriphenylene, for dispersing SWNTs through noncovalent functionalization. Typically, 68 wt% of the initial SWNTs (25 mg/L) were well dispersed in water at the low concentration of hexahydroxytriphenylene (25 mg/L). In order to compare the efficiency of various dispersants, we propose mole‐ and weight‐based dispersing efficiency index (m‐ and w‐DEI, respectively) based on the concentration of the dispersant employed (C_m‐DPS mmol/L or C_w‐DPS mg/L) and the concentration of the SWNTs dispersed (C_d‐CNT mg/L); m‐ and w‐DEI are defined as C_d‐CNT / C_m‐DPS and C_d‐CNT / C_w‐DPS, respectively. Although a biopolymer shows slightly better m‐DEI than hexahydroxytriphenylene, the w‐DEI of hexahydroxytriphenylene is better than that of all the dispersants we compared. For example, the m‐ and w‐DEI of hexahydroxytriphenylene are much better than those of sodium dodecylbenzenesulfonate (SDBS), one of the most widely used dispersant for SWNTs, by two and three orders of magnitude, respectively. The large difference of the DEI between 2,3,6,7,10,11‐hexahydroxytriphenylene and SDBS is found to be supported by the difference in their association constants (K_a) for the complexation with SWNTs, which were determined by the recently reported titration method.

中文翻译：

使用六羟基三苯撑作为分散剂和稳定剂有效生产单壁碳纳米管水分散体

分散单壁碳纳米管（SWNT）是促进SWNT在许多领域中实际应用的关键技术之一。在本文中，我们报告了一种有效的分散剂2,3,6,7,10,11-六羟基联苯，用于通过非共价官能化分散SWNT。通常，68 wt％的初始SWNT（25 mg / L）在低浓度的六羟基三亚苯基（25 mg / L）下很好地分散在水中。为了比较各种分散剂的效率，我们根据所用分散剂的浓度（C _m-DPS mmol / L或C _w），提出了基于摩尔和重量的分散效率指数（分别为m和w -DEI）。_-DPS mg / L）和分散的单壁碳纳米管浓度（C _d-CNT毫克/升）; m-和w -DEI分别定义为C _d-CNT / C _m-DPS和C _d-CNT / C _w-DPS。尽管生物聚合物的m -DEI比六羟基三亚苯基稍好，但六羟基三亚苯基的w -DEI优于我们所比较的所有分散剂。例如，m-和w‐六羟基三亚苯基的DEI分别比十二烷基苯磺酸钠（SDSW）（最广泛用于SWNT的分散剂之一）的DEI分别高两个和三个数量级。发现2,3,6,7,10,11-六羟基三亚苯基与SDBS之间的DEI差异很大，这是由于它们与SWNTs络合的缔合常数（K _a）的差异所支持的，这是由最近确定的报告的滴定方法。

更新日期：2018-06-11

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