Rheology in Product Development: An Insight into 3D Printing of Hydrogels and Aerogels

Barrulas, Raquel V.; Corvo, Marta C.

doi:10.3390/gels9120986

Cited by 15 publications

(2 citation statements)

References 212 publications

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“…In MEX processes, a filament extruder is replaced with a nozzle and fluid dispenser such as a syringe. This is a particularly advantageous process for all-cellulose feedstocks because it does not require melting; cellulosic materials exhibit shear thinning behavior, which improves printability during extrusion; and, the rheological properties of the feedstocks can be finely controlled by varying cellulose loadings and feedstock recipes [58,59]. Cellulose loading plays a critical role in feedstock printability because there is much greater shear thinning behavior for cellulose solutions with higher cellulose molecular weights (MW) and concentrations, whereas, in sufficiently dilute regimes, solution flow behavior is approximately Newtonian [60][61][62].…”

Section: Materials Extrusionmentioning

confidence: 99%

Materials and Methods for All-Cellulose 3D Printing in Sustainable Additive Manufacturing

Albelo,

Raineri,

Salmon

2024

Sustainable Chemistry

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Additive manufacturing, commonly referred to as 3D printing, is an exciting and versatile manufacturing technology that has gained traction and interest in both academic and industrial settings. Polymeric materials are essential components in a majority of the feedstocks used across the various 3D printing technologies. As the environmental ramifications of sole or primary reliance on petrochemicals as a resource for industrial polymers continue to manifest themselves on a global scale, a transition to more sustainable bioderived alternatives could offer solutions. In particular, cellulose is promising due to its global abundance, biodegradability, excellent thermal and mechanical properties, and ability to be chemically modified to suit various applications. Traditionally, native cellulose was incorporated in additive manufacturing applications only as a substrate, filler, or reinforcement for other materials because it does not melt or easily dissolve. Now, the exploration of all-cellulose 3D printed materials is invigorated by new liquid processing strategies involving liquid-like slurries, nanocolloids, and advances in direct cellulose solvents that highlight the versatility and desirable properties of this abundant biorenewable photosynthetic feedstock. This review discusses the progress of all-cellulose 3D printing approaches and the associated challenges, with the purpose of promoting future research and development of this important technology for a more sustainable industrial future.

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Section: Materials Extrusionmentioning

confidence: 99%

Materials and Methods for All-Cellulose 3D Printing in Sustainable Additive Manufacturing

Albelo,

Raineri,

Salmon

2024

Sustainable Chemistry

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“…In DIW processes, a filament extruder is replaced with a nozzle and fluid dispenser such as a syringe. This is a particularly advantageous process for all-cellulose inks because: it does not require melting; cellulosic materials exhibit shear thinning behavior, which improves printability during extrusion; and, the rheological properties of the inks can be finely controlled by varying cellulose loadings and ink recipes [62,63]. Cellulose loading plays a critical role in ink printability as it has been shown that there is much greater shear thinning behavior for cellulose solutions with higher cellulose molecular weights (MW) and concentrations, whereas, in sufficiently dilute regimes, solution flow behavior is approximately Newtonian [64][65][66].…”

Section: Direct Ink Writingmentioning

confidence: 99%

Materials and Methods for All-cellulose 3D Printing in Sustainable Additive Manufacturing

Albelo,

Raineri,

Salmon

2024

Preprint

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Additive manufacturing, commonly referred to as 3D printing, is an exciting and versatile manufacturing technology that is gaining traction and interest in both academic and industrial settings. Polymeric materials are essential components in a majority of the “inks” used across the various 3D printing technologies. As the environmental ramifications of sole or primary reliance on petrochemicals as a resource for industrial polymers continue to manifest themselves at a global scale, a transition to more sustainable bioderived alternatives could offer solutions. In particular, cellulose is promising due to its global abundance, biodegradability, excellent thermal and mechanical properties, and ability to be chemically modified to suit various applications. Thus far, cellulose has typically been incorporated in additive manufacturing applications as a substrate, filler, or reinforcement for other materials. However, due to its versatility and desirable properties, the exploration of all-cellulose 3D printing materials and associated methodologies is increasing. This review will discuss the progress and status of all-cellulose 3D printing approaches, associated challenges, and their potential as a key player in a more sustainable industrial future.

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Assessing rheological properties of oxidized Moringa oleifera gum and carboxymethyl chitosan‐based self‐healing hydrogel for additive manufacturing applications

Verma,

Kumar,

Pradhan

et al. 2024

Polymer Engineering & Sci

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Rheology plays a vital role in pneumatic three‐dimensional (3D) printing of hydrogels. This study investigates the rheological behavior of a novel self‐healing hydrogel (O‐MOG/CMCh) formed by a Schiff base crosslinking reaction between oxidized Moringa oleifera gum (O‐MOG), a biodegradable antimicrobial polysaccharide, and carboxymethyl chitosan (CMCh), a water‐soluble biocompatible chitosan derivative. Three hydrogel formulations were designed using 5% w/v of CMCh with varied concentrations of O‐MOG (3% w/v, 4% w/v, and 5% w/v) and evaluated through rheology analyses, including frequency sweeps, amplitude sweeps, oscillatory thixotropy, and gelation kinetics. These tests revealed that the material has shear thinning, self‐healing properties, a high linear viscoelastic region (LVE), and gel formation times (tgel) of 3.23–4.57 min. The hydrogel synthesized with 5% w/v of O‐MOG composition exhibited the best characteristics for printability based on rheological assessments, and this composition was used for further printing assessment, where bi‐layered 4 × 4 and 2 × 2 grids were successfully printed using 22 G (0.41 mm) and 23 G (0.34 mm) syringes. All the constructs had a printability index value of 1 ± 0.13 and spreading ratios <6.5, demonstrating the feasibility of employing the synthesized hydrogel as an acellular matrix via additive manufacturing.Highlights Self‐healing hydrogel was prepared by mixing the precursors through a cannula. Rheology was examined using standard tests for printability assessment. 3D printability was achieved using two different gauze syringes. Printability parameters were recorded and analyzed for the constructs.

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Rheology in Product Development: An Insight into 3D Printing of Hydrogels and Aerogels

Cited by 15 publications

References 212 publications

Materials and Methods for All-Cellulose 3D Printing in Sustainable Additive Manufacturing

Materials and Methods for All-Cellulose 3D Printing in Sustainable Additive Manufacturing

Materials and Methods for All-cellulose 3D Printing in Sustainable Additive Manufacturing

Assessing rheological properties of oxidized Moringa oleifera gum and carboxymethyl chitosan‐based self‐healing hydrogel for additive manufacturing applications

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