胶体粒子表面有效电荷的实验测量

引用本文: 周宏伟, 米利, 刘丽霞, 徐升华, 孙祉伟. 胶体粒子表面有效电荷的实验测量[J]. 物理化学学报, 2013, 29(06): 1260-1265. doi: 10.3866/PKU.WHXB201303262 shu

Citation: ZHOU Hong-Wei, MI Li, LIU Li-Xia, XU Sheng-hua, SUN Zhi-Wei. Experimental Measurements of the Surface Effective Charge of Colloidal Particles[J]. Acta Physico-Chimica Sinica, 2013, 29(06): 1260-1265. doi: 10.3866/PKU.WHXB201303262 shu

胶体粒子表面有效电荷的实验测量

基金项目:
国家自然科学基金(11172302, 11032011)资助项目 (11172302, 11032011)

摘要:

胶体溶液中带电胶粒的有效电荷是计算粒子间相互作用势的一个重要参数. 在本文中用电导率-粒子数密度关系法和电导滴定法分别研究了七种粒径及表面带电情况均不相同的聚苯乙烯粒子, 结果显示两种测量方法得到的有效电荷数值具有较好的一致性, 误差在7%以内. 同时发现, 经验公式计算的有效电荷差不多是实验值的2倍, 表明文献中的经验公式对于本文所研究的胶体粒子体系不适用.

关键词:

English

Experimental Measurements of the Surface Effective Charge of Colloidal Particles

1.
1 Key Laboratory of Microgravity, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, P. R. China;
2 College of Chemistry, Chemical Engineering and Material Science, Shandong Normal University, Jinan 250014, P. R. China
Received Date: 27 December 2012
Available Online: 17 May 2013
Fund Project:
国家自然科学基金(11172302, 11032011)资助项目

Abstract:

The effective surface charge of colloidal particles is an important parameter for calculating inter-particle interaction potentials. In this study, we investigated the effective charge of seven kinds of polystyrene particles having different diameters and surface charges. Two methods, conductivity-number density relationships and conductometric titration, were used to measure the effective charges. The results obtained from the two different methods show small variations of 7%. The effective charges were also calculated from empirical formulas and found to be twice as large as the experimental values, indicating these formulas cannot be universally applied to all colloidal dispersions.

Key words:

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

胶体粒子表面有效电荷的实验测量

English

Experimental Measurements of the Surface Effective Charge of Colloidal Particles

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

胶体粒子表面有效电荷的实验测量

English

Experimental Measurements of the Surface Effective Charge of Colloidal Particles

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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