多糖凝胶的孔径和化学结构对单壁碳纳米管流动性和选择性分离的影响

引用本文: 杨鹏, 檀付瑞, 张静, 金赫华, 李红波, 刘春华, 李清文. 多糖凝胶的孔径和化学结构对单壁碳纳米管流动性和选择性分离的影响[J]. 物理化学学报, 2014, 30(9): 1764-1770. doi: 10.3866/PKU.WHXB201407032 shu

Citation: YANG Peng, TAN Fu-Rui, ZHANG Jing, JIN He-Hua, LI Hong-Bo, LIU Chun-Hua, LI Qing-Wen. Effects of Pore-Size Range and Composition of Polysaccharide Gels on Flow Behaviors and Selective Sorting of Single-Walled Carbon Nanotubes[J]. Acta Physico-Chimica Sinica, 2014, 30(9): 1764-1770. doi: 10.3866/PKU.WHXB201407032 shu

多糖凝胶的孔径和化学结构对单壁碳纳米管流动性和选择性分离的影响

杨鹏 ^1, ,
檀付瑞 ^2, ,
张静 ^2, ,
金赫华 ^2, ,
李红波 ^2, ,
刘春华 ^1, ,
李清文 ^2,

基金项目:
国家重点基础研究发展规划项目（973）（2011CB932602)

国家自然科学基金（31274130，21073223，20903069）资助

摘要:

基于凝胶柱色谱分离技术研究了单分散的单壁碳纳米管（SWCNTs）在不同化学结构多孔多糖凝胶中的流动特性以及对金属型（m-）/半导体型（s-）SWCNTs 分离的影响. 通过比较SWCNTs 在一系列不同孔径的葡聚糖Sephacryl 凝胶中的流动行为，发现减小孔径尺寸能够增强s-SWCNTs 与凝胶之间的吸附作用力，使大直径的m-SWCNTs 快速地流过凝胶颗粒，而选择性地保留了小直径的s-SWCNTs. 进一步发现多糖凝胶化学结构比孔径尺寸在SWCNTs 的m/s 分离中起着更重要的作用. 当基于葡聚糖结构的Sephacryl 凝胶中的氨基结构被琼脂糖结构所取代时，如Superdex 200 和Sepharose 2B凝胶会增强它们与SWCNTs 之间的作用力，使SWCNTs 的保留时间延长，降低了s-SWCNTs 的选择性和纯度. 此外，即使拥有与Sephacryl S100类似的孔径范围，当Sephacryl 凝胶中的氨基被疏水环氧丙烷基团取代时，葡聚糖凝胶Sephadex G100 与SWCNTs 的作用力很弱，导致所有SWCNTs 快速流动，无法实现SWCNTs 的m/s 分离. 因而，我们认为凝胶孔径和化学结构共同影响并调控了SWCNTs的m/s分离的选择性、纯度以及分离效率.

关键词:

English

Effects of Pore-Size Range and Composition of Polysaccharide Gels on Flow Behaviors and Selective Sorting of Single-Walled Carbon Nanotubes

1.
1. School of Chemical Engineering, Hefei University of Technology, Hefei 230009, P. R. China;
2. Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Science, Suzhou 215123, Jiangsu Province, P. R. China
Received Date: 05 May 2014
Available Online: 29 August 2014
Fund Project:
国家重点基础研究发展规划项目（973）（2011CB932602)

国家自然科学基金（31274130，21073223，20903069）资助

Abstract:

We used gel-column chromatography to show the effects of the pore-size range and chemical composition of porous polysaccharide gels on the flow characteristics and metal/semiconductor (m/s) separation of dispersed single-walled carbon nanotubes (SWCNTs). Comparative studies of the flow behaviors of dispersed SWCNTs in a series of Sephacryl gels with different pore sizes showed that a small pore-size range increased the interaction strength of SWCNTs with gels, leading to rapid flow of thicker metallic (m-)SWCNTs through gel beads, and the selective entrapment of thinner semiconducting (s-)SWCNTs. We also found that the effect of the gel composition was more important than that of the gel porosity on the sorting of SWCNTs. When the amine group in the dextran-based Sephacryl gel was replaced by agarose, e.g., Superdex 200 or Sepharose 2B gel, the interaction with the dispersed SWCNTs was enhanced, resulting in slowing down of both the m- and s- SWCNTs throughout the gel, and obvious deterioration in the selectivity for, and purity of, the s-SWCNTs. In contrast, Sephadex G100 gel, which has one dextran group functionalized by hydrophobic epoxypropane, yielded very weak interactions with SWCNTs, leading to direct drainage of both types of SWCNT, despite its fine pore size, similar to that of Sephacryl S100. We therefore propose that the gel pore size and composition exerted a synergistic effect in verning the m/s sorting of SWCNTs with high selectivity, purity, and efficiency.

Key words:

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沈阳化工大学材料科学与工程学院沈阳 110142

多糖凝胶的孔径和化学结构对单壁碳纳米管流动性和选择性分离的影响

English

Effects of Pore-Size Range and Composition of Polysaccharide Gels on Flow Behaviors and Selective Sorting of Single-Walled Carbon Nanotubes

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南：你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

CCS Chemistry：静电组装导向聚合- 聚电解质纳米凝胶量化制备新策略

CCS Chemistry：金黄色葡萄球菌醛基脱氢酶是如何识别特异性底物的？

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

多糖凝胶的孔径和化学结构对单壁碳纳米管流动性和选择性分离的影响

English

Effects of Pore-Size Range and Composition of Polysaccharide Gels on Flow Behaviors and Selective Sorting of Single-Walled Carbon Nanotubes

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南： 你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

CCS Chemistry：静电组装导向聚合- 聚电解质纳米凝胶量化制备新策略

CCS Chemistry：金黄色葡萄球菌醛基脱氢酶是如何识别特异性底物的？

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

CCS Chemistry：颜徐州、鲍哲南：你的皮肤可能是一片SPMs