疏水缔合聚丙烯酸与蠕虫状胶束的协同作用

引用本文: 梅拥军, 韩一秀, 周洪, 姚林, 江波. 疏水缔合聚丙烯酸与蠕虫状胶束的协同作用[J]. 物理化学学报, 2012, 28(07): 1751-1756. doi: 10.3866/PKU.WHXB201204233 shu

Citation: MEI Yong-Jun, HAN Yi-Xiu, ZHOU Hong, YAO Lin, JIANG Bo. Synergism between Hydrophobically Modified Polyacrylic Acid and Wormlike Micelles[J]. Acta Physico-Chimica Sinica, 2012, 28(07): 1751-1756. doi: 10.3866/PKU.WHXB201204233 shu

疏水缔合聚丙烯酸与蠕虫状胶束的协同作用

梅拥军 ^1,2, ,
韩一秀 ^2, ,
周洪 ^2, ,
姚林 ^1, ,
江波 ^1,

基金项目:
国家自然科学基金-民航联合基金(60979020, 60939001)资助项目 (60979020, 60939001)

摘要:

从宏观流变性和介观尺度方面, 研究了疏水缔合聚丙烯酸(HMPA)与油酸钠(NaOA)构筑的蠕虫状胶束的协同作用. 考察HMPA对蠕虫状胶束溶液流变性和表观粘度的影响, 结果表明, 极少量HMPA的引入导致蠕虫状胶束溶液体系动态模量明显增加; 其表观粘度随HMPA浓度的增加先增强后减弱. 另一方面, 通过耗散颗粒动力学(DPD)分子模拟方法研究了混合体系中溶液组成对HMPA分子链的均方根末端距的影响. 结果表明,随着NaOA浓度增加, HMPA的均方根末端距会出现峰值; HMPA的伸展程度受其自身浓度变化制约, 相对于纯HMPA体系, NaOA胶束的存在对高浓度区的HMPA伸展程度影响更明显. 结合流变实验和分子模拟结果,初步解释了聚合物与蠕虫状胶束的协同作用机制.

关键词:

English

Synergism between Hydrophobically Modified Polyacrylic Acid and Wormlike Micelles

1.
1. College of Chemistry, Sichuan University, Chengdu 610065, P. R. China;
2. The Second Research Institute of Civil Aviation Administration of China, Chengdu 610041, P. R. China
Received Date: 15 January 2012
Available Online: 07 June 2012
Fund Project:
国家自然科学基金-民航联合基金(60979020, 60939001)资助项目

Abstract:

The synergism between wormlike micelles formed from sodium oleate (NaOA) and hydrophobically modified polyacrylic acid (HMPA) was investigated according to their macroscopic performances and mesoscopic scales, using a combination of viscosity/rheology measurements and dissipative particle dynamics (DPD) molecular simulations. The rheology of NaOA wormlike micelles changed significantly following the addition of a small amount of HMPA, which verified the synergistic effect between them. A peak in the apparent viscosity was observed following an increase in the concentration of HMPA, suggesting that the synergistic effect was restricted by the composition of the mixture. A DPD simulation also confirmed that the solution composition had an influence on the root mean square (RMS) end-to-end distances of HMPA, with the observed value fluctuating according to NaOA and HMPA concentrations. The micellar morphology affected the RMS end-to-end distances of HMPA and the presence of NaOA micelles exerted a significant impact on the extension of HMPA at high HMPA concentrations. A proposed synergistic mechanism has been presented according to the experimental and simulation results.

Key words:

Hydrophobically modified polyacrylic acid
/ Wormlike micelle
/ Rheology
/ Apparent viscosity
/ Dissipative particle dynamics molecular simulation
/ Root mean square end-to-end distance

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

疏水缔合聚丙烯酸与蠕虫状胶束的协同作用

English

Synergism between Hydrophobically Modified Polyacrylic Acid and Wormlike Micelles

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通讯作者: 陈斌, bchen63@163.com

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疏水缔合聚丙烯酸与蠕虫状胶束的协同作用

English

Synergism between Hydrophobically Modified Polyacrylic Acid and Wormlike Micelles

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CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

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