Development of Self-Healable Organic/Inorganic Hybrid Materials Containing a Biobased Copolymer via Diels–Alder Chemistry and Their Application in Electromagnetic Interference Shielding

Abstract

In this study, a novel biobased poly(ethylene brassylate)-poly(furfuryl glycidyl ether) copolymer (PEBF) copolymer was synthesized and applied as a structure-directing template to incorporate graphene and 1,1′-(methylenedi-4,1-phenylene)bismaleimide (BMI) to fabricate a series of self-healing organic/inorganic hybrid materials. This ternary material system provided different types of diene/dienophile pairs from the furan/maleimide, graphene/furan, and graphene/maleimide combinations to build a crosslinked network via multiple Diels–Alder (DA) reactions and synergistically co-assembled graphene sheets into the polymeric matrix with a uniform dispersibility. The PEBF/graphene/BMI hybrid system possessed an efficient self-repairability for healing structural defects and an electromagnetic interference shielding ability in the Ku-band frequency range. We believe that the development of the biobased self-healing hybrid system provides a promising direction for the creation of a new class of materials with the advantages of environmental friendliness as well as durability, and shows potential for use in advanced electromagnetic applications.

Synthesis of Poly(Ethylene Brassylate-Co-squaric Acid) as Potential Essential Oil Carrier

“…All the performed spectroscopic analyses confirm the synthesis of PEBSA copolymer, from the breaking cycle of EB evidenced by NMR spectra, to correlated and complementary peaks from FTIR and Raman spectra, which attest the asymmetric and symmetric CH 2 and carbonyl bonds presence from chains, as well the intra- and intermolecular physical interactions within the macromolecular chains. These results are also sustained by other investigations [ 23 ].…”

“…Recently studied MLs include ethylene brassylate (EB), a 17-member ring lactone, commercially available and cheaper than other lactides, lactone or macrolactones. The synthesis of EB homopolymer and other various block/copolymers acquired a noticeable interest due to the offered network formation and building blocks capacity, amphiphilic character, self-assembled morphology, rapid crystallization rate, chains easily susceptive to hydrolytic degradation, as well due to the mechanical behavior with improved flexibility and ductility compared to polylactides [ 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 ]. At the same time, ethylene brassylate copolymers have easily found applicability due to the special characteristics conferred by the copolymerization process, which offers an alternative for tuning the properties of the resulting materials [ 21 ].…”

Preparation of an Antioxidant Assembly Based on a Copolymacrolactone Structure and Erythritol following an Eco-Friendly Strategy

“…At the same time, the differences should be noted between the conditions of ring-opening polymerisation between small lactones and macrolactones that are caused by little or no ring strain in the case of the compounds with 12 or more atoms, which requires specific catalysts to obtain optimal yields [ 2 , 3 , 4 , 5 , 6 , 7 , 8 ]. Recently, one of the most studied macrolactones that is of particular interest is ethylene brassylate (EB), a 17-membered lactone ring, investigated essentially by ring-opening polymerisation [ 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 ]. The synthesised homopolymer, as well as other different EB-based block/copolymers, can provide an amphiphilic character; for example, in the poly(ethylene glycol)-b-poly(ethylene brassylate) copolymer [ 10 ], a higher crystallisation rate of about 67 °C and chains easily susceptible to hydrolytic degradation in the case of copolymers based on D, L-lactide and EB [ 13 ] improved mechanical behaviour, flexibility, and ductility compared to polylactides, since only a molar content of 5% EB comonomer increases the elongation at break from 2 to 87% [ 13 ], and also due to a self-assembled morphology, building block capacity, and network formation.…”

Self-Healing Nanocomposites with Carbon Nanotube/Graphene/Fe3O4 Nanoparticle Tricontinuous Networks for Electromagnetic Radiation Shielding

“…With the increase in use time, shielding materials often suffer from the problems of structural degradation and defect formation, resulting in a substantial decrease in their material properties. To extend their lifespan, DA chemistry can be introduced into polymer composites. − However, despite being a promising strategy, the research field on EMI shielding composites with a DA self-healing function is still immature. There remains much room for the development of such multifunctional systems.…”