超临界 CO2 中两亲梯度和嵌段共聚物的溶解度和自组装。

Solubility and self-assembly of amphiphilic gradient and block copolymers in supercritical CO2.

机构信息

Institut Charles Gerhardt-UMR 5253 CNRS/UM2/ENSCM/UM1, Ingénierie et Architectures Macromoléculaires (IAM), ENSCM, Montpellier, France.

出版信息

J Phys Chem B. 2011 Feb 10;115(5):836-43. doi: 10.1021/jp108888x. Epub 2011 Jan 11.

DOI:10.1021/jp108888x

PMID:21222465

Abstract

This work aims at demonstrating the interest of gradient copolymers in supercritical CO(2) in comparison with block copolymers. Gradient copolymers exhibit a better solubility in supercritical CO(2) than block copolymers, as attested by cloud point data. The self-assembly of gradient and block copolymers in dense CO(2) has been characterized by Small-Angle Neutron Scattering (SANS), and it is shown that it is not fundamentally modified when changing from block copolymers to gradient copolymers. Therefore, gradient copolymers are advantageous thanks to their easier synthesis and their solubility at lower pressure while maintaining a good ability for self-organization in dense CO(2).

摘要

这项工作旨在展示与嵌段共聚物相比，梯度共聚物在超临界 CO2 中的优势。通过浊点数据证明，梯度共聚物在超临界 CO2 中的溶解度优于嵌段共聚物。通过小角中子散射（SANS）对梯度共聚物和嵌段共聚物在致密 CO2 中的自组装进行了表征，结果表明，从嵌段共聚物变为梯度共聚物时，自组装并没有从根本上改变。因此，梯度共聚物具有优势，因为它们的合成更容易，在较低压力下具有更好的溶解度，同时在致密 CO2 中保持良好的自组织能力。