Rational Design of Zwitterionic Polymers with Tunable Phase Separation Propensity

Area of Science:

• Polymer Science
• Materials Science
• Biomaterials

Background:

• Zwitterionic polymers form fluid-like coacervates with beneficial properties like antifouling and biocompatibility.
• These polymers are promising for biomedical applications such as diagnostics and bioseparation.
• Predicting zwitterionic polymer phase separation and designing new materials is challenging due to a lack of guiding principles.

Purpose of the Study:

• To develop a predictive workflow for zwitterionic polymer phase separation behavior.
• To guide the design of novel phase-separating zwitterionic polymers.
• To understand the molecular basis of phase separation in zwitterionic polymers.

Main Methods:

• Utilized molecular dynamics simulations, theoretical modeling, and experimental validation.
• Synthesized new zwitterionic polymers to test predictive capabilities.
• Analyzed intermolecular interactions driving phase separation.

Main Results:

• Validated a simulation-based workflow for predicting phase separation (none, liquid-liquid, or liquid-gel).
• Successfully synthesized zwitterionic polymers exhibiting diverse phase separation behaviors.
• Gained insights into how specific functional groups influence homotypic intermolecular interactions and phase behavior.

Conclusions:

• The developed workflow accurately predicts zwitterionic polymer phase separation.
• Molecular simulations offer crucial insights into structure-property relationships for coacervate formation.
• This approach facilitates the rational design of advanced zwitterionic polymer materials for biomedical uses.