Electroactive shape memory performance of polyurethane composite having homogeneously dispersed and covalently crosslinked carbon nanotubes

Abstract

The electroactive shape memory of carbon nanotube-filled polyurethane composites,

Thermosetting polyurethane‐multiwalled carbon nanotube composites: Thermomechanical properties and nanoindentation

“…31 The covalent modification of the CNT surface frequently contributes to the optimization of these variables. 32 The range of compositions studied in this work includes the most frequently evaluated concentrations: 0.25, 0.5, and 1.0 wt % of carbon nanotubes. [4][5][6] The mechanical behavior observed for both nanocomposites, with MWCNT and MWCNT-ox, was consistent with the results observed in Figure 3 for the MWCNT-ox based system.…”

Electroactive shape memory performance of polyurethane/graphene nanocomposites

“…Chemically-modified TRG can be incorporated into the polymer by covalent bonding [18], which generally makes fine dispersion of TRG in polymer matrix and augments the electrical conductive of the composite [21]. On the other hand, little has been evolved from the literature survey for the use of graphene as electroactive shape memory materials [22,23].…”

Electroactive shape memory polymer based on optimized multi-walled carbon nanotubes/polyvinyl alcohol nanocomposites

“…When an electrical current passes through the conductive fillers/polymer composites, Joule heating is induced by the fillers that can facilitate the transformation of the polymer shapes. In this case, low glass transition temperature (T g ) polymers such as bio-based polyesters [19], polyurethane [20], polyurethane/poly(lactic acid) blends [12], poly( -caprolactone) [10], and epoxies [21], are usually chosen as the matrices and good performances of the shape memory polymer composites can be obtained because of the low T g threshold. For example, Tang et al incorporated 11.6 vol.% carbon nanofibers into a bio-based polyester and the shape recovery ratio (R r ) reached 97% in 90 s under a 20 V driver [19].…”