Mechanical Reinforcement in Thermoplastic Polyurethane Nanocomposite Incorporated with Polydopamine Functionalized Graphene Nanoplatelet

Abstract

Thermoplastic polyurethane (TPU) nanocomposites incorporated with polydopamine functionalized graphene nanoplatelet (PDA-GNP) were prepared by in situ polymerization. Fourier transform infrared spectroscopy results indicated that the addition of PDA-GNP could promote the formation of hydrogen bonding and microphase separation. The microstructure obtained from small-angle neutron scattering indicated that the addition of PDA-GNP increased the number while significantly it decreased the size of hard microdomains. Scanning electron microscopy demonstrated that PDA-GNP exhibited strong interfacial interactions with TPU matrix. In particular, the tensile strength, strain at break, and toughness of TPU/PDA-GNP with as low as 0.5 wt % PDA-GNP increased by 313, 16, and 279%, respectively. This individualized phenomenon was attributed to the abundant covalent bonding between PDA-GNP and TPU resulting in strong interfacial interactions and good compatibility specifically associated with the changes of TPU microstructure.

Designing Biomimetic Microphase‐Separated Motifs to Construct Mechanically Robust Plant Protein Resin with Improved Water‐Resistant Performance

“…Meanwhile, the intensity of tan δ, assuming the measure of damping properties, exhibits a significant enhancement for the SP‐D‐PU adhesive film in comparison with the pristine SP. It can be explained for that the improved interfacial interactions between the D‐PU and SP increase the internal friction energy dissipation . As proved by previous tests, the incorporated D‐PU can induce the formation of a microphase‐separated structure within the SP matrix to increase the molecular chain mobility for a decreased tan δ.…”

Preparation of silver nanoparticle functionalized polyamide fibers with antimicrobial activity and electrical conductivity

“…In addition, some new peaks appeared in the spectra of PA6/PDA fibers: the absorbances at 1566 cm −1 was ascribed to the aromatic rings in PDA . The absorption band at 2901 cm −1 belonged to the antisymmetric and symmetric stretching vibrations of CH 2 in PDA . Additionally, it has revealed that PDA was unstable in alkaline condition .…”

“…23 The absorption band at 2901 cm −1 belonged to the antisymmetric and symmetric stretching vibrations of CH 2 in PDA. 24 Additionally, it has revealed that PDA was unstable in alkaline condition. 25 To further confirm the successful deposition of PDA on PA6 fibers, PA6/PDA fibers were washed with alkaline eluent (pH = 13) for 2 h at room temperature.…”

Improvement of self-cleaning waterborne polyurethane-acrylate with cationic TiO2/reduced graphene oxide

“…Various methods were reported to improve the dispersibility in polymer matrix via changing the surface properties of nanoller. [28][29][30][31] Noncovalent modication of nanoller is a simple and effective method to promote the combination of nanoller-polymer composites. Among non-covalent modication methods, electrostatic attraction between nanoller and polymer matrix is also an efficient approach to combine nanoller-polymer nanocomposites.…”