\”Kill more birds\”: Vitrimers imparting natural porous biomass-based energy storage material versatility

Recently, Shaanxi University of Science and Technology \”Biomass Chemical and Materials Academy of Sciences Innovation Team\” Bear Chuanyin associate professor and his research team reported a load of NiS / Ni of natural wood matrix composites (CLFW @ Ni-NiS) polymer grade glass (Vitrimers) binding, using the characteristic of the conventional double Vitrimers both thermoplastic and thermosetting polymers, gives novel carbon-based biomass energy storage material of high strength, mouldable shaped, self-healing and shape memory characteristics such as , while proved improved electrochemical performance of the material introduced into the circulation to a certain extent on the Vitrimers. Thesis novel design ideas, greatly broadens the range of applications of biomass materials, but also provides new exploratory attempt to cross the convergence of different disciplines.

Additives magic

Vitrimers is a new material, a conventional ester interchange reaction catalyst is generally required, and only needs to herein Vitrimers heating can be prepared by a transesterification reaction in the old bond breakage when a new bond is formed, combines the advantages of thermoplastic and thermosetting materials, and does not undermine the overall crosslink density material.

Vitrimers synthetic routes and Mechanism schematic

Vitrimers booster porous natural wood-based composites

Wood inherent porous structure and load wherein the flower shaped nano NiS interleaved between the fibers acquired pore structure formed, provides a lot of storage space and rapid electron transfer channels, advantageous for obtaining a high energy and power density. However, carbonized wood-based composites often brittle and dusting, which seriously affect the life and cycle stability, greatly limiting its scope of application. Virimers as an additive, which crosslinked network structure can effectively prevent the electrode material (especially powder) shed particles during storage, thus significantly improving the cycle stability and life carbonized wood-based composite electrode material.

Vitrimers- electrochemical properties of wood-based composites

Vitrimers- wood-based complexNatural porous composite material due to the introduction channel structure and metal nanoparticles wood, giving the composite material good sensing characteristics and ORR.

Vitrimers- ORR wood-based composites and sensing properties

Vitrimers added such that the wood-based composite multifunctional material has good shaping, shape memory, and self-healing properties, this phenomenon is mainly due to the rapid and efficient reaction of the hydroxyl with an amino ester exchange occurs in breaks, can quickly form a covalent bond between the cracks, it can be shaped so as to achieve the shape memory effect, and self-repairing.

(Video-S1,2, a, B) of different thickness Vitrimers- wood-based composite material may be shaped and a shape memory characteristic. (C) Self-healing properties

The greatest significance of this study is the high pseudocapacitive properties acquired hole and NiS innate porosity and prepared clever use of biomass material of NiS nanofiber flower like structure formed and good particle characteristics of Ni nano ORR, these parts group synergy wood-based composite material is obtained having excellent storage, sensing and catalytic properties. Further, by introducing a multi-functional type glass imparting a high molecular Vitrimers good wood-based composite material may be shaped, self-healing properties and shape memory. This work has important implications and a reference value for the development and application of biomass-based multi-functional materials. Original link: https: //pubs.rsc.org/en/content/articlepdf/2020/ta/d0ta03664a