Highly Stretchable Fully Biomass Autonomic Self-Healing Polyamide Elastomers and Their Foam for Selective Oil Absorption

Abstract

Renewable polymers with self-healing ability, excellent elongation, hydrophobicity, and selective oil absorption attributes are of interest for an extensive range of applications, such as e-skin, soft robots, wearable devices, and cleaning up oil spills. Herein, two fully renewable eco-friendly polyamide (PA)-based self-healing elastomers (namely, PA36,IA, and PA36,36) were prepared by a facile and green one-pot melt polycondensation of itaconic acid (IA), PripolTM 1009, and PriamineTM 1075 monomers. The molecular structures of these PAs were analyzed by FITR, 1H NMR, and 13C NMR. The distinct structure of these PAs shows superior strain values (above 2300%) and high ambient temperature autonomous self-healing ability. Interestingly, the synthesized renewable PA36,36 showed zero water absorption values and hydrophobic properties with a contact angle of θ = 91o compared to the synthesized PA36,IA and other previously reported PAs. These excellent attributes are due to the low concentration of amide groups, the highly entangled main chains, the intermolecular diffusion, the manifold dangling chains, and the numerous reversible physical bonds within the renewable PAs. Furthermore, the hydrophobic properties may aid in the selective oil absorption of the PA36,36-based foam, for which PA36,36 foam is produced by the green supercritical carbon dioxide (scCO2) batch foaming process. The PA36,36 foam with a microporous cellular structure showed better absorption capacity and high stability in repeated use. Due to these advantages, these bio-based PAs have potential for the production of eco-friendly self-healing materials, superabsorbent foams, and other polymeric materials.

Strong and Reusable Biobased Multiblock Copolyester Adhesives

“…Its performance was better than polyolefin (82.3%), polyester (25.1%), and epoxy resin (51.2%) adhesives. Owing to the presence of strong intermolecular interactions among furan rings, hard crystalline domains, and the polyesters' hydrophobic nature, these factors contributed together to this unexpected solvent tolerance. ,,, Therefore, PETF-30 achieved an excellent solvent resistance to commonly used solvents. To further investigate the applicability of PETFs to other substrates, diverse substrates were performed by the lap shear tests.…”

Biobased Thermoplastic Polyamide Elastomers: Preparation, Properties, and Applications

“…Chen and Rwei et al 60 prepared two foaming materials, PA36,36 and PA36, IA, using supercritical CO 2 intermittent foaming. Among them, PA36,IA material was synthesized with itaconic acid and biobased diacid, and its structural formula is shown in Figure 12e.…”

“…Copyright 2021, Elsevier, Ltd.] (e) The synthesis of PA36,IA. [Reprinted with permission from ref . Copyright 2021 by the authors.…”

Synthesis of High-Value Bio-Based Polyamide 12,36 Microcellular Foams with Excellent Dimensional Stability and Shape Recovery Properties

“…The FTIR spectrograph of PA12,36 (Figure 1b) shows characteristic amide bands at 3293 cm −1 (amide-I, N-H vibration), 1637 cm −1 (amide II, C=O stretching), 1538 cm −1 (amide III, N-H deformation coupled with C-N), and 1260 cm −1 (amide IV, N-H bending), created by the reaction of DDA with FDA. Furthermore, the vanishing IR signals at 3005 cm −1 and 1707 cm −1 indicate that all COOH groups of FDA reacted with DDA amine groups [35]. Originally, we analyzed the FDA 1 H NMR spectrum, which was highly suitable for the comparative examination of the resulting PA12.36 (Figure 2).…”