Related Experiment Video
Updated: Dec 8, 2025
10:03
The Preparation of Electrohydrodynamic Bridges from Polar Dielectric Liquids
Published on: September 30, 2014
26.9K
Ionic hydrogen bond effects on polyelectrolyte brushes beyond the hydronium and hydroxide ions
Jian Zhang1, Siyuan Xu, Hengguo Jin
1Hefei National Laboratory for Physical Sciences at the Microscale, Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes, Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, P. R. China. gml@ustc.edu.cn.
Chemical Communications (Cambridge, England)
|September 17, 2020
Summary
Hydrogen bonding between counterions and polymer chains controls polyelectrolyte brush properties like hydration and stiffness. This discovery expands the use of ionic hydrogen bonds in advanced polymer systems.
Area of Science:
- Polymer Chemistry
- Materials Science
- Physical Chemistry
Background:
- Polyelectrolyte brushes are polymers with charged groups along the chain.
- Their properties are crucial for applications in coatings, sensors, and biomedical devices.
- Controlling these properties is key to tailoring material performance.
Purpose of the Study:
- To investigate the role of hydrogen bonding between counterions and polyelectrolyte chains.
- To demonstrate tunability of polyelectrolyte brush properties via specific ionic interactions.
- To explore new methods for controlling polymer brush characteristics.
Main Methods:
- Synthesis and characterization of strong and weak polyelectrolyte brushes.
- Utilizing hydrogen bonding interactions between bound counterions and grafted polymer chains.
- Analysis of brush properties including hydration, stiffness, conformation, and wettability.
Main Results:
- Demonstrated that hydrogen bonding, beyond simple electrostatic interactions, significantly influences brush properties.
- Showcased tunable control over hydration, stiffness, conformation, and wettability.
- Identified specific counterion-chain interactions as a key tuning parameter.
Conclusions:
- Ionic hydrogen bonding provides a versatile mechanism to precisely control polyelectrolyte brush properties.
- This finding broadens the applicability of hydrogen bonding effects in designing functional polymer systems.
- Offers new avenues for advanced materials development.
Related Concept Videos
01:04Hydrogen Bonds
12.5K
A hydrogen bond is formed when a weakly positive hydrogen atom already bonded to one electronegative atom (for example, the oxygen in the water molecule) is attracted to another electronegative atom from another polar molecule, such as water (H2O), hydrogen fluoride (HF), or ammonia (NH3). The huge electronegativity difference between the H atom (2.1) and the atom to which it is bonded (4.0 for an F atom, 3.5 for an O atom, or 3.0 for an N atom), combined with the very small size of an H atom...
12.5K
00:26Hydrogen Bonds
129.1K
Hydrogen bonds are weak attractions between atoms that have formed other chemical bonds. One of these atoms is electronegative, like oxygen, and has a partial negative charge. The other is a hydrogen atom that has bonded with another electronegative atom and has a partial positive charge.
Hydrogen Bonds Control the World!
Because hydrogen has very weak electronegativity when it binds with a strongly electronegative atom, such as oxygen or nitrogen, electrons in the bond are unequally shared....
Hydrogen Bonds Control the World!
Because hydrogen has very weak electronegativity when it binds with a strongly electronegative atom, such as oxygen or nitrogen, electrons in the bond are unequally shared....
129.1K
02:42Aqueous Solutions and Heats of Hydration
16.9K
Water and other polar molecules are attracted to ions. The electrostatic attraction between an ion and a molecule with a dipole is called an ion-dipole attraction. These attractions play an important role in the dissolution of ionic compounds in water.
When ionic compounds dissolve in water, the ions in the solid separate and disperse uniformly throughout the solution because water molecules surround and solvate the ions, reducing the strong electrostatic forces between them. This process...
When ionic compounds dissolve in water, the ions in the solid separate and disperse uniformly throughout the solution because water molecules surround and solvate the ions, reducing the strong electrostatic forces between them. This process...
16.9K
03:13Intermolecular Forces
67.5K
Atoms and molecules interact through bonds (or forces): intramolecular and intermolecular. The forces are electrostatic as they arise from interactions (attractive or repulsive) between charged species (permanent, partial, or temporary charges) and exist with varying strengths between ions, polar, nonpolar, and neutral molecules. The different types of intermolecular forces are ion–dipole, dipole–dipole, hydrogen bonds, and dispersion; among these, dipole–dipole, hydrogen...
67.5K
03:38Polyprotic Acids
31.2K
Acids are classified by the number of protons per molecule that they can give up in a reaction. Acids such as HCl, HNO3, and HCN that contain one ionizable hydrogen atom in each molecule are called monoprotic acids. Their reactions with water are:
31.2K
03:22Strong Acid and Base Solutions
34.6K
A strong acid is a compound that dissociates completely in an aqueous solution and produces a concentration of hydronium ions equal to the initial concentration of acid. For example, 0.20 M hydrobromic acid will dissociate completely in water and produces 0.20 M of hydronium ions and 0.20 M of bromide ions.
34.6K