Abstract All‐polymer and paper‐based energy storage devices have significant inherent advantages in comparison with many currently employed batteries supercapacitors regarding environmental friendliness, flexibility, cost versatility. The research within this field is undergoing an exciting development as new polymers, composites are being developed. In report, we review recent progress concerning the of flexible based on electronically conducting polymers cellulose containing particular...

Abstract Nanocellulose fibrils are ubiquitous in nature and nanotechnologies but their mesoscopic structural assembly is not yet fully understood. Here we study the features of rod-like cellulose nanoparticles on a single particle level, by applying statistical polymer physics concepts electron atomic force microscopy images, assess physical properties via quantitative nanomechanical mapping. We show evidence right-handed chirality, observed both bundles fibrils. Statistical analysis...

Conducting polymers for battery applications have been subject to numerous investigations during the last two decades. However, functional charging rates and cycling stabilities so far found be insufficient practical applications. These shortcomings can, at least partially, explained by fact that thick layers of conducting used obtain sufficient capacities batteries. In present letter, we introduce a novel nanostructured high-surface area electrode material energy storage composed cellulose...

Abstract Designing lightweight nanostructured aerogels for high‐performance electromagnetic interference (EMI) shielding is crucial yet challenging. Ultrathin cellulose nanofibrils (CNFs) are employed assisting in building ultralow‐density, robust, and highly flexible transition metal carbides nitrides (MXenes) with oriented biomimetic cell walls. A significant influence of the angles between walls incident EM wave electric field direction on EMI performance revealed, providing an intriguing...

Ultralight and highly flexible biopolymer aerogels, composed of biomimetic cellular microstructures formed from cellulose nanofibers silver nanowires, are assembled via a convenient facile freeze-casting method. The lamellar, honeycomb-like, random porous scaffolds successfully achieved by adjusting freezing approaches to modulate the relationships between macroscopic mechanical electromagnetic interference (EMI) shielding performances. Combining transformation arising in situ compression...

Abstract Ultrathin, lightweight, and flexible electromagnetic interference (EMI) shielding materials are urgently demanded to address EM radiation pollution. Efficient design utilize the shields' microstructures is crucial yet remains highly challenging for maximum EMI effectiveness (SE) while minimizing material consumption. Herein, novel cellular membranes designed based on a facile polydopamine‐assisted metal (copper or silver) deposition electrospun polymer nanofibers. The can...

It is demonstrated that it possible to coat the individual fibers of wood-based nanocellulose with polypyrrole using in situ chemical polymerization obtain an electrically conducting continuous high-surface-area composite. The experimental results indicate high surface area water dispersed material, a large extent, maintained upon normal drying without use any solvent exchange. Thus, employed on microfibrillated cellulose (MFC) nanofibers hydrogel gives rise composite, structure which—unlike...

Abstract Traditional thin-film energy-storage devices consist of stacked layers active films on two-dimensional substrates and do not exploit the third dimension. Fully three-dimensional would allow energy storage in bulk materials with arbitrary form factors mechanical properties unique to such as compressibility. Here we show based layer-by-layer self-assembly interdigitated thin surface an open-cell aerogel substrate. We demonstrate a reversibly compressible supercapacitor carbon nanotube...

Step by step: A robust and rapid method for the layer-by-layer assembly of polymers nanoparticles on strong elastic aerogels has been developed. Thin films biomolecules, conducting polymers, carbon nanotubes were assembled, which resulted in with a number functions, including high charge-storage capacity. As service to our authors readers, this journal provides supporting information supplied authors. Such materials are peer reviewed may be re-organized online delivery, but not copy-edited...

Abstract With the development of internet‐of‐things for applications such as wearables and packaging, a new class electronics is emerging, characterized by sheer number forecast units their short service‐life. Projected to reach 27 billion in 2021, connected devices are generating an exponentially increasing amount electronic waste (e‐waste). Fueled growing e‐waste problem, field sustainable attracting significant interest. Today, standard energy‐storage technologies lithium‐ion or alkaline...

Abstract Bioinspired hydrogels are complex materials with distinctive properties comparable to biological tissues. Their exceptional sensitivity various external stimuli leads substantial application potential in wearable smart devices. However, these multifaceted often challenging be combined pattern customization, stimulus responsiveness, self‐healing, and biocompatibility. Herein, inspired by mussel secretions, a printable, biocompatible MXene‐based composite hydrogel was designed...

Abstract Improving interface connectivity of magnetic nanoparticles in carbon aerogels is crucial, yet challenging for assembling lightweight, elastic, high‐performance, and multifunctional architectures. Here, an situ growth strategy to achieve high dispersion metal–organic frameworks (MOFs)‐anchored cellulose nanofibrils enhance the connection quality proposed. Followed by a facile freeze‐casting carbonization treatment, sustainable biomimetic porous with highly dispersed closely connected...

Amyloid fibril-based ultralow-density aerogels are designed by functionalization with gold nanoparticles and microcrystals, leading to hybrids of unprecedented lightness functionality. By changing the colloidal shape, size, concentration, composition can be tuned reach contents ≥20 kt equivalent, yet at densities ≈103 lighter than any equivalent alloys, combining unique features such as porosity, catalytic properties, pressure sensing, autofluorescence. As a service our authors readers, this...

This work presents conductive aerogel composites of nanofibrillated cellulose (NFC) and polypyrrole (PPy) with tunable structural electrochemical properties. The are prepared by chemically polymerizing pyrrole onto TEMPO-oxidized nanofibers dispersed in water the various nanostructures obtained employing different drying methods. Supercritical CO2 is shown to generate high porosity largest surface area (246 m2 g−1) reported so far for a conducting polymer–paper based material, whereas...

Nanocellulose (NC) suspensions can form rigid volume-spanning arrested states (VASs) at very low volume fractions. The transition from a free-flowing dispersion to VAS be the result of either an increase in particle concentration or reduction interparticle repulsion. In this work, concentration-induced has been studied with special focus on influence aspect ratio and surface charge density, attempt is made classify these VASs. results show that for types systems two general identified:...

Abstract Transition metal carbides and nitrides (MXenes) have shown great potential for constructing thin, high‐performance electromagnetic interference (EMI) shields. The challenges with these materials involve the weak interfacial interactions of MXenes, which results in inferior mechanical properties structure MXene films a conductivity/EMI shielding performance decay related to poor oxidation stability. Numerous efforts been devoted improving or stability films, always comes at expense...

We report on a procedure for the preparation, printing and curing of antibacterial poly(N-isopropylacrylamide) nanocellulose-reinforced hydrogels. These composites present highly anisotropic microstructure which allows to control modulate resulting mechanical properties. The incorporation such nanoparticles enables us modify both strength humidity-dependent swelling direction printed parts, offering fourth-dimensional property composite. Antibacterial properties hydrogels were obtained by...

Biomimetic, lamellar, and highly porous transition-metal carbide (MXene) embedded cellulose nanofiber (CNF) aerogels are assembled by a facile bidirectional freeze-drying approach. The biopolymer have large-scale, parallel-oriented micrometer-sized pores show excellent mechanical strength flexibility, tunable electrical properties, low densities (2.7–20 mg/cm3). CNF, MXene, lamellar efficiently utilized to endow the with exceptionally high birefringence in terahertz (THz) regime....

Nanocellulose was used to assist the preparation of ambient pressure dried CNT foams with well-ordered pore microchannels that enable orientation induced tuning their electromagnetic interference shielding performance.