Carbon dot – Unique reinforcing filler for polymer with special reference to physico-mechanical properties

High-performance thermoplastic polyurethane elastomer/carbon dots bulk nanocomposites with strong luminescence

“…14 Furthermore, the appearance of the typical υ (C−S) at 1260 cm −1 and the enhancement of δ (N−H) at 800 cm −1 confirm the chemical linkages of the CDs with the TPU matrix, forming a slightly cross-linking network structure. 2,4,18 (as depicted in Figure 1).…”

“…Carbon dots (CDs), a new carbon nanomaterials with sizes below 10 nm, have been extensively spotlighted for their fascinating attributes including cheap production, low toxicity, high solubility, easy functionalization, tunable photoluminescence (PL), and good biocompatibility, and so on. 1 –3 These unique advantages give rise to their enormous potential applications in sensing, biomedical imaging, photo catalysis, and optoelectronic devices. 4 –6 However, most of the reported CDs exist in solution systems, 7 –10 which severely limit their extensive applications especially in real devices.…”

“…And eventually, they got the highest QY at around 16% in the solid matrix. Sreenath and co-workers 2 produced the carboxylated acrylonitrile butadiene (XNBR) latex-CDs composite by the covalent conjugation of amine groups of the CDs to carboxylic groups of the XNBR latex, and the QY of the CDs in XNBR-CDs composite was found to be 0.61, which was measured by using the time resolved fluorescence spectroscopy. Hao et al 12 prepared poly(ethylene glycol)/CDs composite solid films, and the highest QY reached 12.6%.…”

“…20 The chemical linkages between CDs and the polymer could increase their interfacial interactions and prevent the aggregation of CDs by creating a cross-linking reaction or forming an interpenetrating network, which eventually aids to improve the properties of the nanocomposite in a significant manner. 2,4 Therefore, in the present report, we prepared high-performance thermoplastic polyurethane (TPU) elastomer/CDs bulk nanocomposites via in situ polymerization technique (Figure 1), where the CDs were incorporated during the TPU synthesis. The CDs have a large number of functional groups on the surface.…”

In situ generation of carbon dots within a polymer matrix

“…Besides aqueous solutions, interest lies on the development of solid state hybrid materials such as C-dots based nanopowders [40][41][42], thin films [43,44] and polymer nanocomposites [45][46][47][48][49][50]. In principle, the preparation of C-dots based nanocomposites is realised by means of solution blending [46][47][48][49][50], use of precursor materials [45,51], layer by layer assembly [43,44] and covalent guest-host conjugation [52]. To that end, preformed C-dots were mixed with polyaniline (PANI) in water and the PANI/C-dot nanocomposite was centrifuged out of the solution [46].…”