3D Printing of an In Situ Grown MOF Hydrogel with Tunable Mechanical Properties

2020 ◽  
Vol 12 (29) ◽  
pp. 33267-33275 ◽  
Author(s):  
Wangqu Liu ◽  
Ozan Erol ◽  
David H. Gracias
Keyword(s):  
Mechanical Properties ◽  
3D Printing ◽  
Tunable Mechanical Properties

3D printing of an extremely tough hydrogel

RSC Advances ◽  
2015 ◽  
Vol 5 (99) ◽  
pp. 81324-81329 ◽  
Author(s):  
Junhua Wei ◽  
Jilong Wang ◽  
Siheng Su ◽  
Shiren Wang ◽  
Jingjing Qiu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
3D Printing ◽  
3D Printed ◽  
Tunable Mechanical Properties

A super tough hydrogel with tunable mechanical properties was 3D printed.

scholarly journals Synergistically complexation of phenol functionalized polymer induced in-situ microfiber formation for 3D printing of marine-based hydrogel

2022 ◽  
Author(s):  
Hafez Jafari ◽  
Christine Delporte ◽  
Katrien V. Bernaerts ◽  
Houman Alimoradi ◽  
Lei Nie ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
3D Printing ◽  
Chemical Modification ◽  
Biomedical Applications ◽  
Safe Approach

The design of 3D printable bio-based hydrogels with enhanced mechanical properties and minimal chemical modification can open new opportunities in the field of biomedical applications. A facile and safe approach...

scholarly journals Reversible Mechanical Regulation and Splicing Ability of Alginate-Based Gel Based on Photo-Responsiveness of Molecular-Level Conformation

Materials ◽  
2019 ◽  
Vol 12 (18) ◽  
pp. 2919 ◽  
Author(s):  
Ma ◽  
He ◽  
Wan ◽  
Xiang ◽  
Fan ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Molecular Conformation ◽  
Molecular Level ◽  
Irradiation Time ◽  
Covalent Bonds ◽  
Cavity Structure ◽  
New Strategy ◽  
Hollow Cavity ◽  
Tunable Mechanical Properties

In this study, benefiting from the sensitive molecular conformation transversion in azobenzene, a new strategy for fabricating alginate gels with the abilities of splicing and photo-responsive mechanical adjustment is reported. Firstly, a 4,4’-azobis(benzoylhydrazide) (Azo-hydrazide) linker was used to crosslink alginate physically via the electrostatic interaction between hydrazide groups and carboxyl groups. It was then shaped and transferred in situ to a chemically crosslinked gel via 450 nm light irradiation. Under the irradiation, the molecular conformation change of azobenzene in the linker was able to form covalent bonds at the crosslinking points of the gels. Furthermore, the reversible conformation transformation of azobenzene was able to induce the increase and decrease of the storage modulus under irradiation with 365 nm light and 450 nm light, respectively, while also providing gel-like mechanical properties, depending upon the irradiation time and given wavelength. Meanwhile, the results also indicated that active groups could contribute to the splicing ability of the gel and construct a hollow cavity structure. It is believed that this work could provide a versatile strategy for preparing photo-responsive gels with reversibly tunable mechanical properties.

scholarly journals Synthesis and Formulation of PCL-Based Urethane Acrylates for DLP 3D Printers

Polymers ◽  
2020 ◽  
Vol 12 (7) ◽  
pp. 1500
Author(s):  
Hsuan Chen ◽  
Shyh-Yuan Lee ◽  
Yuan-Min Lin
Keyword(s):  
Mechanical Properties ◽  
3D Printing ◽  
Biomedical Application ◽  
Complex Structure ◽  
Digital Light Processing ◽  
Glycol Diacrylate ◽  
Molecular Weights ◽  
3D Printers ◽  
Poly Ethylene ◽  
Tunable Mechanical Properties

In this study, three PCL-based polyurethane acrylates were synthesized and further formulated into twelve resins for digital light processing (DLP) 3D printing. Three PCL diols with different molecular weights were synthesized via ring-opening reaction of ε-caprolactone on diethylene glycol, with the catalyst stannous octoate. Isophorone diisocyanate (IPDI) was reacted with 2-hydroxyethyl acrylate (2-HEA) and the PCL diols form PCL-based polyurethane acrylates. Twelve resins composed of different percentages of PCL-based polyurethane acrylates, poly (ethylene glycol) diacrylate (PEGDA), propylene glycol (PPG) and photo-initiator were further printed from a DLP 3D printer. The viscosities of twelve resins decreased by 10 times and became printable after adding 30% of PEGDA. The degree of conversion for the twelve resins can reach more than 80% after the post-curing process. By changing the amount of PEGDA and PPG, the mechanical properties of the twelve resins could be adjusted. PUA530-PEG-PPG (70:30:0), PUA800-PEG-PPG (70:30:0), and PUA1000-PEG-PPG (70:30:0) were successfully printed into customized tissue scaffolds. Twelve PCL-based polyurethane photo-curable resins with tunable mechanical properties, cytotoxicity, and degradability were successfully prepared. With the DLP 3D printing technique, a complex structure could be achieved. These resins have great potential for customized tissue engineering and other biomedical application.

Fused Filament Deposition of Silicone Blends With Tunable Mechanical Properties

2020 ◽  
Author(s):  
Bryson Jaipean ◽  
Kevin Estelle ◽  
Ruchira Tandel ◽  
B. Arda Gozen
Keyword(s):  
Mechanical Properties ◽  
3D Printing ◽  
Rheological Properties ◽  
Elastic Moduli ◽  
Transient Behavior ◽  
High Compliance ◽  
Relative Composition ◽  
Pot Life ◽  
Side Walls ◽  
Tunable Mechanical Properties

Abstract Addition-cured silicones are widely used in emerging soft robotics and wearable device technologies which can benefit greatly from the customizability offered by versatile 3D printing methods such as fused filament deposition (FFD). However, precursors of addition-cured silicones, particularly the ones with high compliance, are generally incompatible with 3D printing due to their rheological properties. Several silicones with rheological properties suitable for 3D printing lacks the compliance necessary for many application. This paper explores FFD of composite silicone inks consisting of two types of addition cured silicone precursors with different rheology and mechanical properties: inherently 3D-printable Dow SE-1700 with low compliance and non-printable Smooth-On EcoFlex 00-10 with high compliance. Specifically, blended ink rheology, morphology and the mechanical properties of the printed structures are experimentally studied. It was shown that 3D printable rheology was maintained in inks that contained up to 33% EcoFlex 00-10, even though the reduction in the elastic moduli and the yield stress were noted. Inclusion of EcoFlex 00-10, led to smoother side walls of the printed structures at an optimal composition. Through varying the relative composition of the two components, 100% tensile moduli of the printed structures can be controlled between 959–347 kPa. Several issues are noted associated with the transient behavior of the blended inks due to short pot life of the EcoFlex 00-10.

3D printing hydrogels with orthogonally tunable mechanical properties (Conference Presentation)

2019 ◽  
Author(s):  
Asais Camila Uzcategui ◽  
Archish Muralidharan ◽  
Yangyi Yu ◽  
Karin Payne ◽  
Virginia L. Ferguson ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
3D Printing ◽  
Tunable Mechanical Properties

In situ fabrication of a composite hydrogel with tunable mechanical properties for cartilage tissue engineering

2019 ◽  
Vol 7 (15) ◽  
pp. 2463-2473 ◽  
Author(s):  
Fenbo Ma ◽  
Yongmei Ge ◽  
Nian Liu ◽  
Xiangchao Pang ◽  
Xingyu Shen ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tissue Engineering ◽  
Cartilage Tissue Engineering ◽  
Composite Hydrogel ◽  
Cartilage Tissue ◽  
In Situ Fabrication ◽  
Tunable Mechanical Properties

A composite hydrogel with tunable mechanical properties has been fabricated and characterized in this study.

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