Bioinspired self-assembled films of carboxymethyl cellulose–dopamine/montmorillonite

Abstract

Biomimetic nanocomposites were prepared via MTM intercalated with dopamine-conjugated CMC, leading to materials with super wet strength and high flame retardancy.

Mussel-inspired biocompatible polydopamine/carboxymethyl cellulose/polyacrylic acid adhesive hydrogels with UV-shielding capacity

“…In the FTIR spectra of PDA/CMC/PAA hydrogel (Fig. 2 C,b), the absorption band at 1160 cm −1 arises from the asymmetric stretching of glycosidic bridge C–O–C (Guo et al 2019 ), indicating CMC was incorporated into PDA/CMC/PAA hydrogel.…”

“…The peaks of PDA/CMC/PAA hydrogel in Fig. 2 B,b at 288.5 eV, 286.4 eV and 284.8 eV are mainly ascribed to the bonds of O–C=O, C–O/C–N and C–C, respectively (Guo et al 2019 ). The intensity of peak at 286.4 eV in Fig.…”

Kinetic Modeling and Degradation Study of Liquid Polysulfide Resin-Clay Nanocomposite

“…In general, it can be observed from Table 3 and Figure 5 that the inhibitory effect of CNPs increases the thermal stability of the final nanocomposites, which is typically the primary effect at low clay concentrations. The thermal stability of the samples at low percentage clay incorporation is due to the proper interaction between the CNPs and the LPS matrix as shown in Figure 1 , as well as the shielding effect of the charred polymer on the surface, which stops oxygen from being widely absorbed into the polymer matrix and raises the temperature of degradation [ 21 , 31 ].…”

“…The increase in the temperature of the heat degradation of nanocomposites containing lower percentages of CNPs than 5% can be justified by the decrease in the free movement of volatile products in polymer nanocomposites due to the heat degradation (gases emitted during sample pyrolysis) [17,30] In general, it can be observed from Table 3 and Figure 5 that the inhibitory effect of CNPs increases the thermal stability of the final nanocomposites, which is typically the primary effect at low clay concentrations. The thermal stability of the samples at low percentage clay incorporation is due to the proper interaction between the CNPs and the LPS matrix as shown in Figure 1, as well as the shielding effect of the charred polymer on the surface, which stops oxygen from being widely absorbed into the polymer matrix and raises the temperature of degradation [21,31].…”

“…Methods including Ozawa–Flynn–Wall (OFW), Friedman, Kissinger, and Coats-Redfern are widely utilized in determining the parameters of thermal degradation [ 18 ]. Some of these methods, such as OFW and Kissinger, can be applied to study the kinetics degradation of polymer nanocomposites using the results of TGA and DSC analyses [ 20 , 21 ]. Therefore, in the current study, in addition to the fabrication and characterization of LPS/CNP nanocomposites, the modeling of the thermal degradation behavior was performed by Kissinger and OFW methods.…”