报告详情
High-performance giant electrorheological material prepared based on BTRU@CDs nanoparticles
编号：74
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更新：2023-03-28 10:15:00 浏览：839次
张贴报告
报告开始：2023年06月10日 12:15（Asia/Shanghai）
报告时间：1min
所在会场：[E] Poster [E] Poster
摘要
In this study, carbon quantum dots (CDs) [1] were introduced during the preparation of giant electrorheological (BTRU) particles [2], resulting in the successful synthesis of various small-sized BTRU particles and BTRU@CDs nanoparticles. The small particle size improved the interface polarization ability under an electric field, thereby enhancing the electrorheological effect. The particle size distribution results showed that as the size of individual particles decreased, the particle size distribution became wider, indicating the presence of larger aggregates in the particles. However, the introduction of CDs narrowed the particle size distribution, which was concentrated around 200 nm. As the particle size decreased, the yield strength of GERF (giant electrorheological fluid) at 5 kV/mm increased from 39.2 kPa to 107.3 kPa, and the zero-field viscosity increased from 0.56 Pa·s to 2.83 Pa·s. The GERF filled with small-sized and well-dispersed BTRU@CDs particles had a yield strength of 109.0 kPa at 5 kV/mm, and the zero-field viscosity decreased to 2.11 Pa·s, effectively reducing the zero-field viscosity while maintaining a high yield strength. GERF samples with smaller particle sizes exhibited better anti-settling performance over 30 days. The study of the corresponding giant electrorheological elastomers (GEREs) showed that as the particle size decreased, the relative electrorheological effect of GERE at 3 kV/mm increased from 452.30% to 6697.26%, and the relative electrorheological effect of GERE filled with BTRU@CDs particles at 3 kV/mm reached 11236.86%. Viscoelasticity and cross-linking density tests showed that as the particle size decreased, the cross-linking density of the elastomer gradually decreased, and the damping factor gradually increased, exhibiting high viscosity. Finally, a composite table tennis racket rubber based on GERE was successfully demonstrated to control the rebound height of vertically falling objects, revealing its wide potential applications in vibration control.
关键词
Dielectric particles; particle size; electrorheological materials; electrorheological effects
报告人
Yubing Han
PhD Candidate Shanghai University稿件作者
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重要日期
-
会议日期
06月09日
2023
至06月12日
2023
-
03月15日 2023
摘要录用通知日期
-
03月31日 2023
摘要截稿日期
-
06月12日 2023
注册截止日期
-
09月20日 2023
初稿截稿日期
主办单位
Chongqing University
University of Science and Technology of China
University of Science and Technology of China
联系方式
- Registration/Event Questions
- er******@cqu.edu.cn
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