Nanocarrier-loaded block copolymer dual domain organogels

POLYMER

卷:214

Article

Mineart, Kenneth P.¹  Walker, William W.¹  Mogollon-Santiana, Joaquin¹  Coates, Ian A.¹  Hong, Cameron¹  Lee, Byeongdu² 

[1] Bucknell Univ, Dept Chem Engn, Lewisburg, PA 17837 USA

[2] Argonne Natl Lab, Xray Sci Div, 9700 S Cass Ave, Argonne, IL 60439 USA

关键词: Organogels;    Block copolymers;    Self-assembly;   

DOI  :  10.1016/j.polymer.2020.123246

来源: Elsevier

【 摘 要 】

Loaded polymer gels are prevalent materials in the controlled release community and, fairly recently, have been formulated to include nanocarrier domains such as micelles and vesicles. One mechanism used to establish the solid-like characteristic of gels is block copolymer self-assembly, which can result in a system-spanning, physically-crosslinked network. The combination of nanocarrier and crosslink domain presence offers gels with a rich nanoscale phase space capable of intricate macroscopic property tuning. The current manuscript provides an overview of nanocarrier-loaded block copolymer organogels wherein nanocarriers are reverse micelles formed by sodium dioctyl sulfosuccinate (AOT), the block copolymer is a styrenic ABA triblock copolymer, and the gel solvent is aliphatic mineral oil. This introductory overview starts by identifying the envelope in ternary phase space wherein nanocarrier-loaded block copolymer organogels form (2-49 wt% triblock copolymer and 8x10(-3)-1 wt% AOT). Next, a detailed nanostructural description of gels varying in AOT and triblock copolymer concentration is presented. The manuscript concludes with demonstration of AOT reverse micelle release and gel uniaxial tensile response for gels containing 0-1 wt% AOT and 5-40 wt% styrenic triblock copolymer.

【 授权许可】

Free