ER effect of self-crosslinked poly(ionic liquid)s
ID:76 Submission ID:82 View Protection:ATTENDEE Updated Time:2023-06-02 16:50:23 Hits:485 Invited speech

Start Time:2023-06-11 16:00 (Asia/Shanghai)

Duration:20min

Session:[S1] Concurrent Session 1 » [S1-7] Concurrent Session 1-7 & 1-8

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Abstract
Different from classic polyelectrolytes, poly(ionic liquid)s (PILs) bearing hydrophobic counterions show high electrorheological (ER) effect in dry state. This opens a way to develop new generation of anhydrous polyelectrolyte ER fluids. However, PILs with linear backbone are limited in practical applications due to low glass transition temperature. Herein, we present self-crosslinked PILs-based ER materials with good temperature stability. The influence of counterions and alkyl spacer on ER effect are studied in order to understand the structure-property relationship. It shows that as alkyl spacer length increases, the ER effect increases but the working temperature range becomes narrow. As the size increases, the ER effect decreases (i.e. BF4- > PF6- > TfO- > TFSI-). Different from the linear PILs system, however, the self-crosslinked PILs with inorganic counterions shows stronger ER effect compared to self-crosslinked PILs with organic counterions. Meanwhile, the influence of counterions on temperature dependence of ER effect of the self-crosslinked PILs system is also different from the linear PIL system.

 
Keywords
ER effect,poly(ionic liquid)s,self-crosslinking
Speaker
Jianbo Yin
Professor Northwestern Polytechnical University

Submission Author
Jianbo Yin Northwestern Polytechnical University
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