Water and Salt Effects in Polyelectrolyte Complexes

Project Details

Description

Polymers with electric charge are called polyelectrolytes. When oppositely charged polyelectrolytes are mixed in water solution they assemble to form aggregates, complexes. Polyelectrolyte complexes have applications ranging from biomedical to temperature-responsive materials and adhesives and they are closely related to polyelectrolyte multilayers. In water solution, these complexes can undergo a “glass-melt” transition in which they suddenly become softer. The plasticization response, and especially its dependency on water and salt, remain poorly understood. This proposal targets resolving the role salt ions and water in the polyelectrolyte complex plasticization. The new knowledge will allow not only fine-tuning the softening transition temperature but also tailoring the physical properties of these materials toward new applications.

Description

Polymers with electric charge are called polyelectrolytes. When oppositely charged polyelectrolytes are mixed in water solution they assemble to form aggregates, complexes. Polyelectrolyte complexes have applications ranging from biomedical to temperature-responsive materials and adhesives and they are closely related to polyelectrolyte multilayers. In water solution, these complexes can undergo a "glass-melt" transition in which they suddenly become softer. The plasticization response, and especially its dependency on water and salt, remain poorly understood. This proposal targets resolving the role salt ions and water in the polyelectrolyte complex plasticization. The new knowledge will allow not only fine-tuning the softening transition temperature but also tailoring the physical properties of these materials toward new applications.
Short titleWASAPE / Sammalkorpi
StatusFinished
Effective start/end date01/09/201731/12/2021

UN Sustainable Development Goals

In 2015, UN member states agreed to 17 global Sustainable Development Goals (SDGs) to end poverty, protect the planet and ensure prosperity for all. This project contributes towards the following SDG(s):

  • SDG 7 - Affordable and Clean Energy
  • SDG 12 - Responsible Consumption and Production

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