Dual responsive cellulose microspheres with high solid-state fluorescence emission

Luminescent 3D printed poly(lactic acid) nanocomposites with enhanced mechanical properties

“…PBA was reacted with CNF using the DCC/DMAP coupling reaction (as shown in Scheme 1) to render fluorescence properties to CNF. [ 22 ] FTIR and Solid‐state NMR confirmed the reaction between CNF and PBA, as shown in Figure 1.…”

“…After a gradual increase in the amount of PBA‐m‐CNF into PLA, emission of PLA/PBA‐m‐CNF biocomposite exhibited a redshifted peak which slightly differs from that of PLA, PLA/PBA‐m‐CNF0.5 and indicates the possible aggregation of PBA‐m‐CNF in the matrix owing to the intermolecular interactions. [ 22 ] Furthermore, mixing TPU into PLA/PBA‐m‐CNF1 biocomposite did not shift the emission maximum. However, it resulted in an enhancement in intensity (Figure 3A).…”

“…Moreover, these research publications have not captured the solid‐state quantum yield, an important metric for fluorescence emission. [ 22 ]…”

“…Moreover, these research publications have not captured the solid-state quantum yield, an important metric for fluorescence emission. [22] Although PLA-based FDM 3D printing is well researched, certain challenges such as brittleness, low thermal stability, sluggish crystallization rate, poor melt strength, lack of flexibility and elasticity, and mechanical anisotropy, among other issues, limit the industrial applications of PLA 3D printed objects. [23] Attempts to mitigate these drawbacks by including nanoscale additives such as nanocrystalline cellulose, [24] cellulose nanofibers (CNFs), [25] carbon nanotubes (CNTs), [26] graphene, [27,28] and so on have met with some success.…”