The burgeoning interest in biopolymer 3D printing arises from its capacity to meticulously engineer tailored, intricate structures, driven by the intrinsic benefits of biopolymers—renewability, chemical functionality, and biosafety. Nevertheless, accessibility economical versatile 3D-printable biopolymer-based inks remains highly constrained. This study introduces an electroconductive ink for direct-ink-writing (DIW) printing, distinguished straightforward preparation commendable...

Abstract Cellulose is the most abundant and broadly distributed organic compound industrial by-product on Earth. However, despite decades of extensive research, bottom-up use cellulose to fabricate 3D objects still plagued with problems that restrict its practical applications: derivatives vast polluting effects, in combination plastics, lack scalability high production cost. Here we demonstrate general manufacture large objects. Our approach diverges from common association green plants it...

Materials for wearable devices, tissue engineering and bio-sensing applications require both antibacterial activity to prevent bacterial infection biofilm formation, electrical conductivity electric signals inside outside of the human body. Recently, cellulose nanofibers have been utilized various but itself has neither nor conductivity. Here, an electrically conductive composite was formed by generating catechol mediated silver nanoparticles (AgNPs) on surface nanofibers. The chemically...

Dentin hypersensitivity is sharp and unpleasant pains caused by exposed dentinal tubules when enamel outside of the tooth wears away. The occlusion via in situ remineralization hydroxyapatite best method to alleviate symptoms dentin hypersensitivity. Commercially available dental desensitizers are generally effective only on a specific area relatively toxic, their performance usually depends skill clinician. Here, facile efficient treatment with remarkable aesthetic improvement inspired...

Cellulose nanofiber (CNF) is one of the emerging green candidates for various domains due to its sustainability, abundance availability, and high surface area. However, effectiveness in environmental aspect toxic heavy metal removal required improvement by tuning interface between CNF metals, understanding mechanisms. Herein, we synthesized four types surface-functionalized from waste coffee-filters enhanced uptake AsV CrVI different water matrices. Among them, Fe3+-cross-linked CNF-Fe2O3...

Bioinspired manufacturing, in the sense of replicating way nature fabricates, may hold great potential for supporting a socioeconomic transformation towards sustainable society. Use unmodified ubiquitous biological components suggests fundamentally manufacturing paradigm where materials are produced, transformed into products and degraded closed regional systems with limited requirements transport. However, adoption is currently by fact that despite their nature, these biopolymers...

The multi-material structures found in soft robot bodies, from stretchable elastomers to hard connectors, can display highly distinct physicochemical properties, challenging the engineering of robust interfaces required for long-term performance real-world scenarios. Here, a novel family hybrid resins combining platinum-catalyzed silicones with epoxy cured by acid anhydrides is reported enable fabrication functional bodies strong interfaces. By adjusting composition resins, elastic modulus...

Freeform liquid three-dimensional printing (FL-3DP) is a promising new additive manufacturing process that uses yield stress gel as temporary support, enabling the processing of broader class inks into complex geometries, including those with low viscosities or long solidification kinetics were previously not processable. However, full exploitation these advantages for fabrication multilateral structures has been hindered by difficulties in controlling interfaces between and supports. In...

Value addition of seaweed polysaccharides by their functional modification with various substrates leading to new effects.

Crude cellulose as well alpha- and beta-celluloses were estimated in thirty-four seaweed species of fifteen orders Chlorophyta, Phaeophyta Rhodophyta Indian waters. The greatest yields crude a-cellulose obtained from Chaetomorpha aerea (approx. 20.0% 18.5%, respectively), beta-cellulose 3.1%) Caulerpa imbricata. lowest cellulose, alpha-and beta-contents recorded for the calcareous red alga Liagora indica 0.90%, 0.70% 0.10%, respectively). There was little variation content among brown algae,...

Tannin–metal chelates for the efficient nucleation of hydroxyapatite and an aesthetically improved solution dentinal hypersensitivity treatment.

We present a system for 3D printing large-scale objects using natural biocomposite materials, which comprises precision extruder mounted on an industrial six-axis robot. This paper highlights work controlling process settings to print filaments of desired dimensions while constraining the operating point region maximum tensile strength and minimum shrinkage. Response surface models relating geometric physical properties extruded are obtained through face-centered central composite designed...

Carboxymethyl cellulose (CMC) based new thixotropic gels were synthesized by a facile microwave-induced reaction of aminobenzoic acids (ABAs)<italic>e.g. para</italic>- and<italic>meta</italic>-aminobenzoic acids.

We present an additive manufacturing system for 3D printing large-scale objects using natural bio-composite materials. The process, affine to the Direct Ink Writing method, achieves build rate of 2.5cm3/s a precision dispensing unit mounted on industrial six-axis robot. During deposition composite is wet and exhibits thixotropy. As it loses moisture hardens shrinks anisotropically. This paper highlights work controlling process settings print filaments desired dimensions while constraining...

Cellulose was extracted from the roots, stems and stem tips of Salicornia brachiata Roxb. Each crude cellulose sample obtained fractionated into alpha- beta-celluloses. The yields were greatest lowest, respectively, while beta-celluloses in order, roots > tips. samples characterized by Fourier transform infrared spectroscopy (FT-IR), solid state cross polarisation magic angle spinning carbon-13 nuclear magnetic resonance (CP/MAS 13C NMR), X-ray diffraction pattern (XRD), thermo gravimetric...