Abstract
Abstract Designing versatile rubber as a multifunctional elastomer is of great importance, incorporating it with biomass-derived nanoblocks will mitigate environmental challenges. Here biosynthesized natural rubber (NR) composites with CoFe2O4-immobilized biomass carbon (BC) derived from macadamia nutshells were fabricated by facile mechanical mixing. Morphological analysis indicates that CoFe2O4 nanoparticles are uniformly anchored on the surface of BC, forming intact electromagnetic loss networks in NR matrix. As a consequence, the as-fabricated NR/CoFe2O4@BC composites demonstrate enhanced mechanical, thermal, and electromagnetic performance. Particularly, NR/CoFe2O4@BC composite shows the best microwave attenuation capacity when CoFe2O4@BC loading is 40 phr, with the minimum reflection loss (RL) of −35.00 dB and effective absorption bandwidth (RL < −10 dB) of 1.60 GHz. All results indicate that this work open new paradigm for multiple applications based on biosynthetic elastomer with the sustainable biomass derived nanoblocks.
Highlights
Due to their light weight, low cost, flexibility, and other advantages, elastomer has attracted a tremendous surge of interest among researchers [1]
To minimize the environmental impacts caused by fossil-derived elastomeric composites, an alternative is incorporating natural rubber (NR) with biomass-derived nanofillers [6]
Natural rubber latex (NRL) with a solid content of 60% was sourced from Shuguang State Rubber Farm (Zhanjiang Xiashan Xinjia Rubber & Plastic Products Co., Ltd)
Summary
Due to their light weight, low cost, flexibility, and other advantages, elastomer has attracted a tremendous surge of interest among researchers [1]. In order to acquire robust enhancement in mechanical, optical, electrical, magnetic, and thermal properties, elastomer is always modified with nanofillers [2]. Most of the current elastomeric composites are made of fossil-derived matrix and nanofillers, where the emission of pollutant gasses is inevitable. With the increasing environmental awareness and growing demand for sustainability, new generation elastomeric composites should be ideally based on sustainable raw materials using low-cost processing and without any health issues. To minimize the environmental impacts caused by fossil-derived elastomeric composites, an alternative is incorporating natural rubber (NR) with biomass-derived nanofillers [6]. Aim to reinforced mechanical property, several studies have been reported for the preparation of NR nanocomposites with biomass-derived nanofillers. Limited by complicated and incompatible fabrication compounding methods, few materials can be designed and developed to simultaneously meet structural and functional requirements in some specific applications
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