Nanocellulose has been demonstrated as a suitable material for cell culturing, given its similarity to extracellular matrices. Taking advantage of the shear thinning behavior, nanocellulose suits three-dimensional (3D) printing into scaffolds that support attachment and proliferation. Here, we propose aqueous suspensions acetylated low degree substitution direct ink writing (DIW). This benefits from heterogeneous acetylation precursor cellulosic fibers, which eases their deconstruction...

Three-dimensional (3D) printing has been an emerging technique to fabricate precise scaffolds for biomedical applications. Cellulose nanofibril (CNF) hydrogels have attracted considerable attention as a material 3D because of their shear-thinning properties. Combining cellulose with alginate is effective method enable cross-linking the printed in presence Ca2+ ions. In this work, spherical colloidal lignin particles (CLPs, also known nanoparticles) were used prepare CNF-alginate-CLP...

Multiphase (emulsion) gels with internal phase fractions between 0.1 and 0.5 were formulated at low loadings of cellulose nanofibrils (CNF), alginate, polylactide (PLA). Their properties (rheology morphology) fitted those inks used for direct ink writing (DIW). The effect formulation composition variables elucidated after printing cubic scaffolds other solid designs. distinctive microstructures that developed allowed high fidelity displayed limited shrinkage room temperature freeze-drying (0...

Direct-ink-writing (DIW) of hydrogels has become an attractive research area due to its capability fabricate intricate, complex, and highly customizable structures at ambient conditions for various applications, including biomedical purposes. In the current study, cellulose nanofibrils reinforced aloe vera bio-hydrogels were utilized develop 3D geometries through DIW technique. The revealed excellent viscoelastic properties enabled extruding thin filaments a nozzle with diameter 630 μm....

Abstract A biomaterial system incorporating nanocellulose, poly(glycerol sebacate), and polypyrrole is introduced for the treatment of myocardial infarction. Direct ink writing multicomponent aqueous suspensions allows multifunctional lattice structures that not only feature elasticity electrical conductivity but enable cell growth. They are proposed as cardiac patches given their biocompatibility with H9c2 cardiomyoblasts, which attach extensively at microstructural level, induce...

Green energy-storage materials enable the sustainable use of renewable energy and waste heat. As such, a form-stable phase-change nanohybrid (PCN) is demonstrated to solve fluidity leakage issues typical (PCMs). Here, we introduce advantage solid-to-gel transition overcome drawbacks solid-to-liquid counterparts in applications related thermal storage regulation. Polyethylene glycol (PEG) form-stabilized with cellulose nanofibrils (CNFs) through surface interactions. The cellulosic...

Abstract Direct ink writing (DIW) provides programmable and customizable platforms to engineer hierarchically organized constructs. However, one‐step, facile synthesis of such architectures via DIW has been challenging. This study introduces inks based on two‐phase emulgels for direct printing in situ formation protecting layers enveloping multicomponent cores, mimicking skin‐bearing biological systems. The emulgel consists a Pickering emulsion with an organic, internal phase containing...

Heart tissue engineering is critical in the treatment of myocardial infarction, which may benefit from drug-releasing smart materials. In this study, we load a small molecule (3i-1000) new biodegradable and conductive patches for application infarcted myocardium. The composite consist biocompatible elastomer, poly(glycerol sebacate) (PGS), coupled with collagen type I, used to promote cell attachment. addition, polypyrrole incorporated because its electrical conductivity induce signaling....

We proposed a simple method to process hydrogels containing polyvinyl alcohol and cellulose nanofibrils (PVA/CNF) prepare volumetric architectures by direct ink writing (DIW). The presence of CNF in the aqueous PVA suspensions conferred rheology profiles that were suitable for extrusion solidification pre-designed shapes. viscoelastic behavior hybrid inks enabled precise control on processability shape retention, instance, as demonstrated multilayered lattice structures high fidelity. After...

The current study provides a comprehensive rheology and survey on direct ink writing of xanthan gum/cellulose nanocrystal (XG/CNC) bio-inks for developing 3D geometries that mimic soft tissue engineering scaffolds' physical mechanical properties. presence CNC was found to be critical prerequisite the printability XG bio-inks; accordingly, hybrid XG/CNC revealed excellent viscoelastic properties enabled precise control hydrogel shaping printing lattice structures composed up eleven layers...

Lignin is introduced as a suitable component for selective laser sintering (SLS) of polyamide (PA12) to reduce costs while maintaining or improving processability and performance. Alkali lignin (sourced polydisperse, amorphous powder) was used at volume concentration up 60 vol % three-dimensional (3D) printing complex, layered structures. The latter were obtained high axial aspect objects, produced in flat, flipped (90°), vertical directions, which further examined elucidate the effect SLS....

A continuous and scalable method for the wet spinning of cellulose nanofibrils (CNFs) is introduced in a core/shell configuration. Control on interfacial interactions was possible by choice shell material coagulant, as demonstrated here with guar gum (GG) acetate (CA). Upon coagulation acetone, ethanol, or water, GG CA formed supporting polymer shells that interacted to different degrees CNF core. Coagulation rate shown markedly influence orientation filament and, result, its mechanical...

Abstract The rapid co‐assembly of graphene oxide (GO) nanosheets and a surfactant at the oil/water (O/W) interface is harnessed to develop new class soft materials comprising continuous, multilayer, interpenetrated, tubular structures. process uses microfluidic approach that enables interfacial complexation two‐phase systems, herein, termed as “liquid streaming” (LS). LS demonstrated general method design multifunctional specific hierarchical order morphology, conveniently controlled by...

We use dry-jet wet spinning in a coaxial configuration by extruding an aqueous colloidal suspension of oxidized nanocellulose (hydrogel shell) combined with airflow the core. The coagulation hydrogel water bath results hollow filaments (HF) that are drawn continuously at relatively high rates. Small-angle and wide-angle X-ray scattering (SAXS/WAXS) reveals orientation order cellulose sheath, depending on applied shear flow drying method (free-drying under tension). obtained dry HF show...

Owing to its purity and exceptional mechanical performance, bacterial nanocellulose (BNC) is well suited for tissue engineering applications. BNC assembles as a network that features similarities with the extracellular matrix (ECM) while exhibiting excellent integrity in wet state, suitable suturing sterilization. The development of complex 3D forms shown by taking advantage aerobic process involved biogenesis at air/culture medium interphase. Hence, solid supports are used guide formation...

Background Cystoscopy-assisted submucosal injections of urethral bulking agents offer a safe and efficient alternative to surgery for treating urinary incontinence in both dogs women. To address the concern their transient therapeutic effect, preclinical study evaluating biocompatibility, safety, durability nanofibrillated cellulose as agent was designed. Plant-based is considered renewable, biocompatible, non-degradable vivo . best our knowledge, no studies injected into wall experimental...

Direct ink writing via single or multihead extrusion is used to synthesize layer-by-layer (LbL) meshes comprising renewable polysaccharides. The best mechanical performance (683 ± 63 MPa modulus and 2.5 0.4 tensile strength) observed for 3D printed structures with full infill density, given the role of electrostatic complexation between oppositely charged components (chitosan cellulose nanofibrils). LbL develop an unexpectedly high wet stability that undergoes gradual weight loss at neutral...

Current carbon capture and utilization (CCU) technologies require high energy input costly catalysts. Here, an effective pathway is offered that addresses climate action by atmospheric CO2 sequestration. Industrially relevant highly reactive alkali cellulose solutions are used as absorption media. The latter lead to mineralized materials (MCM) at a tailorable cellulose-to-mineral ratio, forming organic-inorganic viscous systems (viscosity from 102 107 mPa s storage modulus 10 105 Pa)....

Chitin nanomaterials are wet-spun into microfibers that biocompatible and show promise for their cell viability proliferation.

Abstract Cellulose utilization at its full potential often requires dissolution which is challenging. Aqueous NaOH the solvent of choice due to rapid, non-toxic, low cost and environmentally friendly process. However, there are several limitations, such as required temperature cellulose´s moderately degree polymerization concentration. Moreover, a tendency for gelation semidilute solutions with time temperature. The addition ZnO aids cellulose hinders self-aggregation in solution; however,...

Direct ink writing (DIW) of Pickering emulsions offers great potential for constructing on-demand objects. However, the rheological properties fluid greatly undermines shape fidelity and structural integrity 3D-printed structures. We solve here these challenges realize a new route towards complex constructs actual deployment. A dynamic, supramolecular host-guest hydrogel based on poly(ethylene glycol) α-cyclodextrin was synthesized in continuous phase cellulose nanocrystal-stabilized...