Cooperative dynamics of heuristic swelling and inhibitive micellization in double-network hydrogels by ionic dissociation of polyelectrolyte

POLYMER

卷:186

Article

Xing, Ziyu¹  Lu, Haibao¹  Hossain, Mokarram²  Fu, Yong Qing³  Leng, Jinsong¹  Du, Shanyi¹ 

[1] Harbin Inst Technol, Sci & Technol Adv Composites Special Environm Lab, Harbin 150080, Peoples R China

[2] Swansea Univ, Coll Engn, Zienkiewicz Ctr Computat Engn, Swansea, W Glam, Wales

[3] Northumbria Univ, Fac Engn & Environm, Newcastle Upon Tyne NE1 8ST, Tyne & Wear, England

关键词: Double network (DN) hydrogels;    Ionic dissociation;    Free energy function;   

DOI  :  10.1016/j.polymer.2019.122039

来源: Elsevier

【 摘 要 】

In this study, a cooperative model has been proposed for the double network (DN) hydrogel, which synchronously undergoes heuristic swelling and inhibitive micellization by the ionic dissociation of polyelectrolyte. Flory-Huggins solution theory is initially employed to identify the working mechanism of dielectric constants on swelling behavior of the DN hydrogel. Then a free-energy function is introduced to formulate the constitutive relationship of the DN hydrogels, in which the first hydrotropic network undergoes a heuristic swelling and the second hydrophobic network undergoes an inhibitive micellization. Finally, the proposed model has been verified using the experimental results reported in the literature. A good agreement between the theoretical results and experimental ones has been achieved. This study provides a fundamental approach to formulate the constitutive relationship and to understand the cooperative dynamics of two types of networks in DN hydrogels induced by the polyelectrolyte.

【 授权许可】

Free