通过接枝聚电解质刷对碳球进行表面改性和表征。

Surface modification and characterization of carbon spheres by grafting polyelectrolyte brushes.

机构信息

School of Printing and Packaging, Wuhan University, Wuhan 430079, People's Republic of China.

School of Printing and Packaging, Wuhan University, Wuhan 430079, People's Republic of China ; State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510641, People's Republic of China.

出版信息

Nanoscale Res Lett. 2014 Jun 4;9(1):283. doi: 10.1186/1556-276X-9-283. eCollection 2014.

DOI:10.1186/1556-276X-9-283

PMID:24948900

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC4053276/

Abstract

Modified carbon spheres (CSPBs) were obtained by grafting poly(diallyl dimethyl ammonium chloride) (p-DMDAAC) on the surface of carbon spheres (CSs). It can be viewed as a kind of cation spherical polyelectrolyte brushes (CSPBs), which consist of carbon spheres as core and polyelectrolytes as shell. The method of synthesizing carbon spheres was hydrothermal reaction. Before the polyelectrolyte brushes were grafted, azo initiator [4,4'-Azobis(4-cyanovaleric acyl chloride)] was attached to the carbon spheres' surface through hydroxyl groups. CSPBs were characterized by scanning electron microscope (SEM), Fourier transform infrared spectroscopy (FTIR), gel permeation chromatography (GPC), conductivity meter, and system zeta potential. The results showed that compared with carbon spheres, the conductivity and zeta potential on CSPBs increased from 9.98 to 49.24 μS/cm and 11.6 to 42.5 mV, respectively, after the polyelectrolyte brushes were grafted. The colloidal stability in water was enhanced, and at the same time, the average diameter of the CSPBs was found to be 173 nm, and the average molecular weight and grafted density of the grafted polyelectrolyte brushes were 780,138 g/mol and 4.026 × 10(9)/nm(2,) respectively.

摘要

改性碳球（CSPBs）是通过在碳球（CSs）表面接枝聚二烯丙基二甲基氯化铵（p-DMDAAC）得到的。它可以看作是一种阳离子球形聚电解质刷（CSPBs），由碳球作为核和聚电解质作为壳组成。碳球的合成方法是水热反应。在接枝聚电解质刷之前，偶氮引发剂[4,4'-偶氮双（4-氰基戊酰氯）]通过羟基附着在碳球表面。通过扫描电子显微镜（SEM）、傅里叶变换红外光谱（FTIR）、凝胶渗透色谱（GPC）、电导率仪和系统zeta 电位对 CSPBs 进行了表征。结果表明，与碳球相比，接枝聚电解质刷后，CSPBs 的电导率和zeta 电位分别从 9.98 增加到 49.24 μS/cm 和 11.6 增加到 42.5 mV。在水中的胶体稳定性增强，同时发现 CSPBs 的平均直径为 173nm，接枝聚电解质刷的平均分子量和接枝密度分别为 780,138g/mol 和 4.026×10(9)/nm(2,)。