Influence of shear thinning and material flow on robotic dispensing of poly(ethylene glycol) diacrylate/poloxamer 407 hydrogels

2017 ◽  
Vol 134 (29) ◽  
pp. 45083 ◽  
Author(s):  
Gabriele Kraut ◽  
Laura Yenchesky ◽  
Fermin Prieto ◽  
Günter E. M. Tovar ◽  
Alexander Southan
Keyword(s):  
Ethylene Glycol ◽  
Material Flow ◽  
Shear Thinning ◽  
Poloxamer 407 ◽  
Poly Ethylene Glycol ◽  
Glycol Diacrylate ◽  
Poly Ethylene

scholarly journals Extrusion-Based 3D Printing of Poly(ethylene glycol) Diacrylate Hydrogels Containing Positively and Negatively Charged Groups

Gels ◽  
2018 ◽  
Vol 4 (3) ◽  
pp. 69 ◽  
Author(s):  
Sebastian Joas ◽  
Günter Tovar ◽  
Oguz Celik ◽  
Christian Bonten ◽  
Alexander Southan
Keyword(s):  
3D Printing ◽  
Ethylene Glycol ◽  
Poloxamer 407 ◽  
Careful Examination ◽  
Flow Profile ◽  
Trimethylammonium Chloride ◽  
Poly Ethylene Glycol ◽  
Glycol Diacrylate ◽  
Material Deposition ◽  
Poly Ethylene

Hydrogels are an interesting class of materials used in extrusion-based 3D printing, e.g., for drug delivery or tissue engineering. However, new hydrogel formulations for 3D printing as well as a detailed understanding of crucial formulation properties for 3D printing are needed. In this contribution, hydrogels based on poly(ethylene glycol) diacrylate (PEG-DA) and the charged monomers 3-sulfopropyl acrylate and [2-(acryloyloxy)ethyl]trimethylammonium chloride are formulated for 3D printing, together with Poloxamer 407 (P407). Chemical curing of formulations with PEG-DA and up to 5% (w/w) of the charged monomers was possible without difficulty. Through careful examination of the rheological properties of the non-cured formulations, it was found that flow properties of formulations with a high P407 concentration of 22.5% (w/w) possessed yield stresses well above 100 Pa together with pronounced shear thinning behavior. Thus, those formulations could be processed by 3D printing, as demonstrated by the generation of pyramidal objects. Modelling of the flow profile during 3D printing suggests that a plug-like laminar flow is prevalent inside the printer capillary. Under such circumstances, fast recovery of a high vicosity after material deposition might not be necessary to guarantee shape fidelity because the majority of the 3D printed volume does not face any relevant shear stress during printing.

Physically and chemically gelling hydrogel formulations based on poly(ethylene glycol) diacrylate and Poloxamer 407

Polymer ◽  
2017 ◽  
Vol 108 ◽  
pp. 21-28 ◽  
Author(s):  
Felix Markus ◽  
Felix Dreher ◽  
Sabine Laschat ◽  
Stefan Baudis ◽  
Günter E.M. Tovar ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Poloxamer 407 ◽  
Poly Ethylene Glycol ◽  
Glycol Diacrylate ◽  
Poly Ethylene

scholarly journals Gel Polymer Electrolytes Based on Cross-Linked Poly(ethylene glycol) Diacrylate for Calcium-Ion Conduction

ACS Omega ◽  
2021 ◽  
Author(s):  
Saeid Biria ◽  
Shreyas Pathreeker ◽  
Francielli S. Genier ◽  
Fu-Hao Chen ◽  
Hansheng Li ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Polymer Electrolytes ◽  
Calcium Ion ◽  
Gel Polymer Electrolytes ◽  
Poly Ethylene Glycol ◽  
Ion Conduction ◽  
Glycol Diacrylate ◽  
Poly Ethylene

Effects of pore morphology and size on antimicrobial activity of chitosan/poly(ethylene glycol) diacrylate macromer semi-IPN hydrogels

2015 ◽  
Vol 132 (43) ◽  
pp. n/a-n/a ◽  
Author(s):  
Nazlı Sokmen Bedel ◽  
Melek Tezcan ◽  
Ozgur Ceylan ◽  
Gulten Gurdag ◽  
Huseyin Cicek
Keyword(s):  
Antimicrobial Activity ◽  
Ethylene Glycol ◽  
Pore Morphology ◽  
Poly Ethylene Glycol ◽  
Glycol Diacrylate ◽  
Poly Ethylene
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