Nanocellulose-based composites for EMI shielding applications

Multifunctional Nanocellulose/Carbon Nanotube Composite Aerogels for High-Efficiency Electromagnetic Interference Shielding

“…Typically, an active EMI shielding aerogel has three functions: reflection (SE R ), absorption (SE A ), and multiple reflections. 24,64 Reflection occurs at the surface level through the interaction of electromagnetic radiation with charge carriers, determined by the alignment of incident waves and electric or magnetic dipoles. Absorption involves wave dissipation across the aerogel.…”

“…Particularly, reflection and absorption depend on the conductivity of the medium; despite these multiple reflections ascribed to radiation bending and scattering due to inner interfaces, they are neglected since the total EMI-SE is higher than 10 dB. 24 Accordingly, the total shielding efficiency considers the sum of reflection and absorption. 15 The EMI shielding efficiencies are displayed in Figure S3.…”

“…20 Within this perspective, the interaction forces between carbon nanotubes and nanocellulose are a relevant factor for the formation of aerogels, and they determine their conductivity and final EMI shielding capacity. 20,24 In this study, a coactive chemical modification of cellulose nanocrystals paired with physical ionic reinforcement of a nanocellulose matrix is proposed to enhance the formation of a cohesive cellulose frame. This work shows the effectiveness of adding cationized CNCs to improve the interaction with anionic nanofibrils and complementary precursors to form a consistent cellulose substructure through simple but practical electrostatic interactions.…”

Cellulosic fiber nanocomposite application review with zinc oxide antimicrobial agent nanoparticle: an opt for COVID-19 purpose

“…Cellulosic biopolymers are listed with its respective industries. For instance, high performance strain sensor and electromagnetic interference (EMI) shielding application, used cellulose hydrogels or as nanocellulose composites, respectively (Anju, 2021;Wang et al, 2022;Zhang et al, 2022a), representing the electronic industry. The former as being tested for its biomimetic skin with adequate mechanical properties containing nanocellulose or microcrystalline cellulose (MCC) for instance of 50 µm in size where the hydrogel was fabricated chemically via crosslinking and under cryogenically lower temperature of − 20 °C.…”

“…The former as being tested for its biomimetic skin with adequate mechanical properties containing nanocellulose or microcrystalline cellulose (MCC) for instance of 50 µm in size where the hydrogel was fabricated chemically via crosslinking and under cryogenically lower temperature of − 20 °C. Meanwhile, in the latter, a modified (Anju, 2021;Wang et al, 2022;Zhang et al, 2022a) Cellular/cellulose membrane, biomembrane, nanocellulose membrane, pollutant adsorbent Downstream processing industry (Alipour et al, 2020;Das et al, 2021;Perendija et al, 2021;Wang et al, 2020;Zhang et al, 2022b) Leaf fibers, sisal fibers, agrofibers, cellulose fibers Foams, polyester, PLA, biodegradable plastics (Bendourou et al, 2021;Guimarães et al, 2021;Jabber et al, 2021;Sathees Kumar et al, 2021;Siva et al, 2020) Modified/regenerated cotton cellulose Fabric industry (Khalili et al, 2021;Štular et al, 2021) Wood-cellulose fiber, graphitic cellufoil, SnS/ carbonized cellulose film Energy industry, battery industries (lithiumion battery), nanogenerators (Yi et al, 2021;Yuan et al, 2021;Zhang et al, 2021) Fluorescent smart materials Fluorescent application (Delavari et al, 2020;Kalita et al, 2015;Nawaz et al, 2021) Dietary fiber, bacterial cellulose Food industry (Lin et al, 2020;Revin et al, 2018;Zhu et al, 2022)…”