Swelling Dynamics of Liquid Crystalline Elastomers

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Presentation transcript:

Swelling Dynamics of Liquid Crystalline Elastomers Notes Swelling Dynamics of Liquid Crystalline Elastomers Jun Geng Lquid Crystal Institute Kent State University Advisor: Dr. Peter Palffy-Muhoray Liquid Crystal Institute, KSU

Outline Liquid crystal elastomer (LCE) sample details and preparation Notes Outline Liquid crystal elastomer (LCE) sample details and preparation Analysis of swelling based on Van der Waals intermolecular potential Solvent swelling experiment Solvent vapor swelling experiment Liquid Crystal Institute, KSU 2 Liquid Crystal Institute, KSU

LCE Details & Preparation Notes LCE Details & Preparation Finkelmann Spin Cast Nematic side chain LCE methylsiloxane backbone biphenyl mesogen (side group)‏ tri-functional crosslinker Liquid Crystal Institute, KSU 3 Liquid Crystal Institute, KSU

Simple Analysis Liquid Crystal Institute, KSU 4 Notes

Solvent Swelling Experiment Notes Solvent Swelling Experiment Designed measurement cell to simultaneously monitor Initial problems: Solvent leaking UV glue degradation Liquid Crystal Institute, KSU 5 Liquid Crystal Institute, KSU

Swelling Experiment solvent pump sample holder solvent reservoir Notes Liquid Crystal Institute, KSU

Notes LCE L3 director L2 L1 Liquid Crystal Institute, KSU

Solvent Vapor Swelling Notes Solvent Vapor Swelling Liquid Crystal Institute, KSU

LCE Bi-Rubber Strip Swelling Notes LCE Bi-Rubber Strip Swelling Normal Rubber: RTV Liquid Crystal Elastomer Toluene Toluene Vapor Liquid Crystal Institute, KSU 9 Liquid Crystal Institute, KSU

Notes Liquid Crystal Institute, KSU

Notes Conclusion Liquid Crystal Institute, KSU

Notes Thanks to: Jeremy taught me how to use those machines in machine shop and supervised my activities, Paul who showed me how to make the elastomers, Michele who lent me a key to the lab, and Jake who told jokes sometimes. Liquid Crystal Institute, KSU

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