Dual physically and chemically cross-linked polyelectrolyte nanohydrogels: Compositional and pH-dependent behavior studies

被引：16

作者：

Ashrafizadeh, Marjan ^{[1
]}

Tam, Kam Chiu ^{[2
]}

Javadi, Aliyar ^{[1
,3
]}

Abdollahi, Mahdi ^{[4
]}

Sadeghnejad, Saeid ^{[5
]}

Bahramian, Alireza ^{[1
]}

机构：

[1] Univ Tehran, Coll Engn, Dept Chem Engn, Tehran 111554563, Iran

[2] Univ Waterloo, Waterloo Inst Nanotechnol, Dept Chem Engn, 200 Univ Ave West, Waterloo, ON N2L 3G1, Canada

[3] Max Planck Inst Colloids & Interfaces Potsdam Gol, Potsdam, Germany

[4] Tarbiat Modares Univ, Fac Chem Engn, Dept Polymer React Engn, Tehran 14115114, Iran

[5] Tarbiat Modares Univ, Fac Chem Engn, Dept Petr Engn, Tehran 14115114, Iran

来源：

EUROPEAN POLYMER JOURNAL | 2020年 / 122卷

关键词：

Acrylic acid/butyl acrylate nanohydrogel; Dual physical and chemical cross-linking; Titration and characterization; pH-Responsive swelling; Counterion association; MICROGEL PARTICLES SYNTHESIS; EMULSION POLYMERIZATION; SWELLING BEHAVIOR; BIOMEDICAL APPLICATIONS; RESPONSIVE NANOGELS; HYDROGELS; DELIVERY; GELS; METHACRYLATE; TEMPERATURE;

D O I：

10.1016/j.eurpolymj.2019.109398

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

This study describes the composition-property relationship of a dual chemically and physically cross-linked nanohydrogel (NHG) containing a high concentration of hydrophilic pH-sensitive acrylic acid (AA). The physical and chemical cross-linking were incorporated using the aggregation of hydrophobic butyl acrylate (BA) and covalent bond of a bifunctional monomer (ethylene glycol dimethacrylate), respectively. Implementing a direct one-pot semi-batch emulsion polymerization technique in an acidic condition yielded monodispersed (PDI < 0.2) NHGs with a collapsed hydrodynamic radius of 60-100 nm. Titration studies revealed the significant effect of the chemical and physical cross-linking on the amounts of accessible carboxyl groups and their ionization behavior. These NHG dispersions displayed good colloidal stability over a wide pH and duration, the Donnan equilibrium is responsible for the observed swelling behavior of these NHGs.

引用

页数：11

共 68 条

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