Abstract detail

436 / 2022-08-12 13:51:00
Preparation and High Temperature Damping Properties of Graphene Oxide Reinforced Polydimethylsiloxane Composites
Graphene oxide,Polydimethylsiloxane,High temperature resistance,Loss modulus
Vibration Isolation
Abstract Accepted
Tong Li / 大连理工大学
Juan Du / Dalian University of Technology
The high temperature vibration load of spacecraft during flight and launch is a very important factor that limits the accuracy and life of equipment and instruments.  Polydimethylsiloxane (PDMS) can effectively suppress vibration and noise in various fields by virtue of its viscoelastic behavior in the glass transition region. However, its glass transition temperature is low and the temperature range is narrow, which cannot meet the high-temperature vibration isolation requirements of spacecraft under launch conditions. In this study, light layered graphene oxide (GO) foam with high elasticity and energy dissipation were prepared by freeze-drying graphene oxide suspension, and GO/PDMS composites were prepared by vacuum drying with PDMS. The properties of the materials were characterized by field emission scanning electron microscope, dynamic mechanical analysis, thermogravimetric analysis and high temperature vibration test. The results show that the layered structure of graphene oxide foam not only provides a group of channels for the full penetration of PDMS, but also facilitates the dissipation of vibration energy. Thanks to the layered structure of graphene oxide, the loss modulus of GO/PDMS composites at high temperature (150 ~ 250 ℃) can reach 0.45MPa, which is about 203% higher than that of pure PDMS. When the temperature reaches 250 ℃, GO/PDMS composites have no obvious weight loss. This study provides an ideal candidate material for passive vibration isolation device under high temperature conditions.

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Important Dates

Abstract Submission Deadline：

 31st March 2021 15th April 2021

Extended Deadline: 1st Aug. 2022

 

Abstract Acceptance:

30th April  2021 Rollover

 

Full Paper Submission Deadline：

30th June 2021  14th July 2021

Extended Deadline: 15th Aug. 2022 

 

Notification of Acceptance:

15th August 2021 1st Sept. 2021

1st Sept. 2022

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