Synthesis of physically crosslinked PAM/CNT flakes nanocomposite hydrogel films via a destructive approach

Abstract

Novel PAM/CNT flakes nanocomposite hydrogel films were synthesized by in situ degradation of the oxidized-MWCNTs into flakes using persulfate activation. The flakes crosslinked the PAM chains via hydrogen bonding to form a hydrogel network.

Tara Tannin-Cross-Linked, Underwater-Adhesive, Super Self-Healing, and Recyclable Gelatin-Based Conductive Hydrogel as a Strain Sensor

“…The second significant weight loss phase in the range of 250–450 °C is attributed to the breaking of the macromolecular backbone and intermolecular hydrogen bonds in gelatin, Tara tannin, and PVA, as well as the removal of different functional groups (e.g., hydroxyl, carboxyl, amino, etc.) . At the third stage (450–700 °C), it can be clearly seen that the residual amount of the GTPC hydrogel (34.50%) was obviously bigger than those of both GTP (29.76%) and GT (28.08%) hydrogels, which could be explained by the addition of CNTs that have good thermal stability .…”

“…52 The second significant weight loss phase in the range of 250−450 °C is attributed to the breaking of the macromolecular backbone and intermolecular hydrogen bonds in gelatin, Tara tannin, and PVA, as well as the removal of different functional groups (e.g., hydroxyl, carboxyl, amino, etc.). 53 At the third stage (450−700 °C), it can be clearly seen that the residual amount of the GTPC hydrogel (34.50%) was obviously bigger than those of both GTP (29.76%) and GT (28.08%) hydrogels, which could be explained by the addition of CNTs that have good thermal stability. 54 Meanwhile, compared with the GT hydrogel, the GTP hydrogel exhibited an increased decomposition temperature by 7.8 °C due to the addition of PVA (Figure 3c), which can be explained by the increased intermolecular hydrogen bonds in the GTP system, and the denser cross-linking network of the GTP hydrogel.…”

Mixed Ionic–Electronic Conducting Hydrogels with Carboxylated Carbon Nanotubes for High Performance Wearable Thermoelectric Harvesters

“…Furthermore, the uniform dispersion of the filamentary CNT-COOH threads in the DN10C to provide a conductive network is clearly revealed in Figure c. By contrast, the DN5C exhibits only a limited presence of such threads (Figure b), thus suggesting that the CNT-COOH molecules are not sufficiently closely packed to form an electrical transport network . Meanwhile, the SEM images of DN-P, DN5C-P, and DN10C-P in Figure d–f reveal the presence of straight white threads traversing the micropores, thus confirming the formation of a continuous PANI layer on the hydrogel surface.…”

TiB2-Derived Nanosheets Enhance the Tensile Strength and Controlled Drug Release of Biopolymeric Films Used in Wound Healing

“…This can be attributed to the increased mobility of the polymer chains and enhanced hydrogen bonding in the polymer matrix upon swelling. The increase in mobility leads to greater flexibility of films but at the expense of reduced tensile strength . The tensile strength of the NTB-incorporated films is compared to that of the previously reported films and given in Table .…”