Abstract
This study is focused on the controllable reduction of the graphene oxide (GO) during the surface-initiated atom transfer radical polymerization technique of glycidyl methacrylate (GMA). The successful modification was confirmed using TGA-FTIR analysis and TEM microscopy observation of the polymer shell. The simultaneous reduction of the GO particles was confirmed indirectly via TGA and directly via Raman spectroscopy and electrical conductivity investigations. Enhanced compatibility of the GO-PGMA particles with a polydimethylsiloxane (PDMS) elastomeric matrix was proven using contact angle measurements. Prepared composites were further investigated through the dielectric spectroscopy to provide information about the polymer chain mobility through the activation energy. Dynamic mechanical properties investigation showed an excellent mechanical response on the dynamic stimulation at a broad temperature range. Thermal conductivity evaluation also confirmed the further photo-actuation capability properties at light stimulation of various intensities and proved that composite material consisting of GO-PGMA particles provide systems with a significantly enhanced capability in comparison with neat GO as well as neat PDMS matrix.
Highlights
Smart materials belong to a group of matters
A of 23.80 kJ·mol−1 further photo-actuation capability. These results indicate that the presence of the graphene oxide (GO)-PGMA particles in the enhanced the significantly photo-actuation capability
The successful grafting of the PGMA on the surface of the GO particles was performed by SI-ATRP and confirmed using TGA-FTIR and TEM investigations
Summary
Smart materials belong to a group of matters. Such physical properties can be changed upon external stimulus i.e., electric [1,2,3,4] or magnetic field [5,6,7,8], pH [9,10,11,12], temperature [13,14,15,16], or light [17,18,19,20]. Polymers 2018, 10, 832 many drawbacks in this topic like stability of the systems or even performance, which reversibly contracts or elongates the polymer composite sample upon light stimulation. Materials exhibiting this phenomenon can find utilization in various systems controlling the damping properties [21], sensing [22], or haptic displays [23]. The broad applications belong to the field of electronic [24], civil engineering [25], or medicine [26], respectively
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