Functional & enhanced graphene/polyamide 6 composite fiber constructed by a facile and universal method

Composite Films of Polydimethylsiloxane and Micro-Graphite with Tunable Optical Transmittance

“…At present, composites are used in a wide range of applications, including strain sensors, electronic displays, optical attenuators and smart windows [4][5][6][7][8][9][10]. Composites, which use carbon materials in high-performance applications, have been widely used owing to their strengthening effect, high stiffening and feasible preparation, such as graphene oxide-silica nanohybrid [11][12][13][14][15][16], graphene/polydimethylsiloxane [17,18] and polylactic acid (PLA) as a host polymer and different forms of carbon fillers [19,20]. Considerable progress has already been made in these fields.…”

Effect of initial density on thermal conductivity of new micro‐pipeline heat conduction C/SiC composites

“…To date, various materials have been utilized as functional phases to enhance the thermal conductivity of C/SiC or SiC/ SiC composites, including graphene, 10 carbon nanotubes (CNTs), 11 diamond, 5,12 and boron nitride. 10 For instance, Feng et al 13 used vacuum filtration combined with chemical vapor infiltration to prepare SiC-CNTs/SiC composites containing 25-30 vol% CNTs with the thermal conductivity reaching 23.9 W•m −1 •K −1 . This can be mainly attributed to the superior thermal conductivity (3000 W•m −1 •K −1 in theory 14 ) of the introduced CNTs and the in-plane high thermally conductive networks formed by these CNTs.…”

Characterization of Polyamide 6/Multilayer Graphene Nanoplatelet Composite Textile Filaments Obtained Via In Situ Polymerization and Melt Spinning

“…The incorporated graphene increased the initial decomposition temperature ( T 10% ) of PA6 fibers by about 30–40 °C, increasing the thermal stability of the PA6 composite fiber to approximately 380 °C and the temperature of the maximum in the weight loss rate ( T max ) by about 20–30 °C. A shift in the initial decomposition temperature and the temperature of the maximum in the weight loss rate toward higher temperatures was also reported for the PA6 fibers with non- or functionalized graphene sheets, which were incorporated into the PA6 matrix either by the melt compounding [ 8 , 29 ] or the in situ anionic polymerization approach [ 4 , 6 ]. In the case of graphene oxide incorporated into the PA6 matrix at 10 wt % via the in situ polymerization approach, the initial decomposition temperature and the temperature of the maximum in the weight loss rate of the corresponding composite were shifted toward lower temperatures in comparison to the neat PA6 fibers, which was assigned to the low molecular weight of PA6 in the composite for the intense disruption to stoichiometric balance caused by excessive carboxylic acids of GO [ 4 , 6 ].…”

“…The incorporated graphene did not significantly influence T m1 , but slightly increased T m2 compared to the neat PA6 and increased T c of PA6 crystallization ( Figure 6 b), which was accompanied by an increased degree of crystallinity ( X c ) only in the case of the PA6/1GN sample ( Table 2 ). This indicates that the incorporated graphene acted as the nucleating agent [ 24 , 29 ] and increased the crystallinity only at a graphene concentration equal to 1 wt.%, whereas higher graphene concentrations probably disrupted the packing of the PA6 chains and, therefore, caused deficient crystallinity behavior. These results, in addition to the melt rheology results, indicate the achievement of a higher dispersion state only in the case of the PA6/1GN sample.…”

“…The latter also reduced the filament linear density, tenacity, and elongation-at-break, reflecting the ability of the GnP-agglomerated microparticles to act as grain boundaries and perturbing agents. Zhang et al reported that when benzalkonium chloride-functionalized graphene oxide is melt-compounded with PA6 prior to the melt spinning of the PA6 filaments containing 0.1–0.9 wt %, the tenacity and elongation-at-break of the composite filaments also decreased [ 29 ]. This was ascribed to a large aspect ratio of graphene particles and stronger interfacial interaction between the two, restricting the movement of polymer chains and decreasing the polymer crystallinity.…”