Related Experiment Video
Updated: May 17, 2026
11:04
Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature
Published on: December 20, 2016
Synthesis and characterization of ionic polymer networks in a room-temperature ionic liquid
Joseph F Stanzione1, Robert E Jensen, Philip J Costanzo
1Department of Chemical & Biological Engineering, Drexel University, Philadelphia, Pennsylvania 19104, USA.
ACS Applied Materials & Interfaces
|October 24, 2012
Summary
Ionic liquid gels were synthesized for ion transport applications. Higher ionic liquid content enhanced conductivity but reduced mechanical strength, offering tunable properties for separation technologies.
Area of Science:
- Materials Science
- Polymer Chemistry
- Electrochemistry
Background:
- Ionic liquid gels (ILGs) are promising for ion transport and separation.
- Developing ILGs requires understanding monomer solubility and polymerization kinetics.
- Controlling ILG properties is crucial for optimizing performance.
Purpose of the Study:
- To synthesize and characterize ionic liquid gels (ILGs) for ion transport.
- To investigate the effect of ionic liquid content on ILG properties.
- To determine the solubility window of monomers in ionic liquids.
Main Methods:
- Free radical copolymerization of AMPS and MBA in an ionic liquid solvent.
- In situ ATR-FTIR for monitoring monomer conversion.
- Differential Scanning Calorimetry (DSC) for glass transition temperature (Tg) determination.
- Compression testing for elastic moduli measurement.
- Conductivity measurements.
- Determination of polymer-IL interaction parameter (χ).
Main Results:
- ILGs were successfully synthesized with tunable properties.
- Glass transition temperatures (Tg) near -50 °C were observed, decreasing with higher IL content.
- Elastic moduli decreased with increasing IL and AMPS content.
- Ionic conductivity increased with higher IL content and lower MBA content, ranging from 0.35 to 2.14 mS cm⁻¹.
- Monomer solubility windows in the ionic liquid were established between 25-65 °C.
Conclusions:
- The study demonstrates the successful synthesis of tunable ILGs.
- Properties like conductivity and mechanical strength can be controlled by adjusting IL and monomer content.
- These ILGs show potential for advanced ion transport and separation applications.
Related Concept Videos
00:57Cationic Chain-Growth Polymerization: Mechanism
The cationic polymerization mechanism consists of three steps: initiation, propagation, and termination. In the initiation step of the polymerization process, the π bond of a monomer gets protonated by the Lewis acid catalyst, which is formed from boron trifluoride and water. The protonation of the π bond generates a carbocation stabilized by the electron‐donating group. In the propagation step, the π bond of the second monomer acts as a nucleophile and attacks the generated carbocation,...
01:20Anionic Chain-Growth Polymerization: Overview
The polymerization process that involves carbanion as an intermediate is called anionic polymerization. It is also a type of addition or chain-growth polymerization. Anionic polymerization gets initiated by a strong nucleophile such as an organolithium or a Grignard reagent. The most commonly used initiator for anionic polymerization is butyl lithium. Monomers involved in anionic polymerization must possess a vinyl group bonded to one or two electron-withdrawing groups. For instance,...
01:04Anionic Chain-Growth Polymerization: Mechanism
The mechanism for anionic chain-growth polymerization involves initiation, propagation, and termination steps. In the initiation step, a nucleophilic anion, such as butyl lithium, initiates the polymerization process by attacking the π bond of the vinylic monomer. As a result, a carbanion, stabilized by the electron‐withdrawing group, is generated. The resulting carbanion acts as a Michael donor in the propagation step and attacks the second vinylic monomer, which acts as a Michael acceptor.
01:21Polymer Classification: Crystallinity
Unlike ionic or small covalent molecules, polymers do not form crystalline solids due to the diffusion limitations of their long-chain structures. However, polymers contain microscopic crystalline domains separated by amorphous domains.
Crystalline domains are the regions where polymer chains are aligned in an orderly manner and held together in proximity by intermolecular forces. For example, chains in the crystalline domains of polyethylene and nylon are bound together by van der Waals...
Crystalline domains are the regions where polymer chains are aligned in an orderly manner and held together in proximity by intermolecular forces. For example, chains in the crystalline domains of polyethylene and nylon are bound together by van der Waals...
01:26Polymer Classification: Stereospecificity
Polymerization generates chiral centers along the entire backbone of a polymer chain. Accordingly, the stereochemistry of the substituent group has a significant effect on polymer properties. Polymers formed from monosubstituted alkene monomers feature chiral carbons at every alternate position in the polymer backbone. Relative to the predominant orientation of substituents at the adjacent chiral carbons, the polymer can exist in three different configurations: isotactic, syndiotactic, and...
01:17Ziegler–Natta Chain-Growth Polymerization: Overview
Ziegler–Natta polymerization is another form of addition or chain‐growth polymerization used for synthesizing linear polymers over branched polymers. The catalyst used for polymerization is the Ziegler–Natta catalyst, named after Karl Ziegler and Giulio Natta, who developed it in 1953. This catalyst is an organometallic complex of titanium tetrachloride and triethyl aluminum, with the active form of the catalyst being an alkyl titanium compound. Using the Ziegler–Natta catalyst, high molecular...