3D printable light-responsive polymers

Roppolo, Ignazio; Chiappone, Annalisa; Angelini, Angelo; Stassi, Stefano; Frascella, Francesca; Pirri, Candido; Ricciardi, Carlo; Descrovi, Emiliano

doi:10.1039/c7mh00072c

Cited by 101 publications

(82 citation statements)

References 47 publications

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“…This separation between indents was imposed to avoid the influence of neighbour indentations. The maximum applied load was of 100 N. The average Young's modulus (E) and H measured values were 3.070±0.010 MPa, and 744.21±5.40 kPa respectively, which are in accordance with previous studies [13]. The mechanical response of the 3D-printed polymer is shown in Fig.…”

Section: A Mechanical Propertiessupporting

confidence: 74%

Bioinspired 3D-printed piezoelectric device for acoustic frequency separation

Domingo-Roca¹,

Jackson²,

Windmill³

2017

2017 Ieee Sensors

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-Development of 3D-printed devices, sensors, and actuators has become increasingly popular in recent years due to low cost, rapid production, and device personalization. This personalization process allows development of devices with unique physical properties and phenomena that enhance the desired properties of the 3D-printed part. Biomimetics is a commonly used technique to develop 3D-printed devices, as organisms present in nature can provide smart and simple solutions to complex problems across a wide range of applications. Locust ears have a simple tympanic membrane with varying thicknesses that allows frequency selection, as well as presenting nonlinear phenomena. This acoustic frequency selection assists the insect in predation and swarming. In this work we present the development of a polymeric material that has been used to 3D-print a frequency selective piezoelectric sensor inspired by the locust's tympanic membrane. 3D-printing of functional sensors and/or actuators provides an insight into the development and enhancement of polymer-based science, with exciting and promising potential for the near future.

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Section: A Mechanical Propertiessupporting

confidence: 74%

Bioinspired 3D-printed piezoelectric device for acoustic frequency separation

Domingo-Roca¹,

Jackson²,

Windmill³

2017

2017 Ieee Sensors

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“…We utilize Polyjet photopolymer technology that allows multi-material deposition [29][30][31][32] to 3D print compliance-tailored single-lap joints (SLJs), as shown in Figure 1a (top). The emergence of such multi-material and composite 3D printing technologies [33][34][35][36][37][38][39] facilitates the design of functionally graded designs at the sub-millimeter scale enabling fabrication of multi-material structures simultaneously exhibiting both strength and toughness, which are often difficult to achieve with homogeneous materials.…”

Section: D Printing and Compliance-tailoring Of The Multimaterials Jointmentioning

confidence: 99%

Stress Reduction of 3D Printed Compliance‐Tailored Multilayers

et al. 2017

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Multilayered multi-material interfaces are encountered in an array of fields. Here, enhanced mechanical performance of such multi-material interfaces is demonstrated, focusing on strength and stiffness, by employing bondlayers with spatially-tuned elastic properties realized via 3D printing. Compliance of the bondlayer is varied along the bondlength with increased compliance at the ends to relieve stress concentrations. Experimental testing to failure of a tri-layered assembly in a single-lap joint configuration, including optical strain mapping, reveals that the stress and strain redistribution of the compliance-tailored bondlayer increases strength by 100% and toughness by 60%, compared to a constant modulus bondlayer, while maintaining the stiffness of the joint with the homogeneous stiff bondlayer. Analyses show that the stress concentrations for both peel and shear stress in the bondlayer have a global minimum when the compliant bond at the lap end comprises %10% of the bondlength, and further that increased multilayer performance also holds for long (relative to critical shear transfer length) bondlengths. Damage and failure resistance of multi-material interfaces can be improved substantially via the compliance-tailoring demonstrated here, with immediate relevance in additive manufacturing joining applications, and shows promise for generalized joining applications including adhesive bonding.

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“…Formulations III and IV were used in ad igital light processing (DLP) [17] 3D printer with LEDs (405 nm) for 3D printing. In spite of the high swellability,s hape-persistent, free-standing 3D structured objects can be printed.…”

Section: Zuschriftenmentioning

confidence: 99%

All‐in‐One Cellulose Nanocrystals for 3D Printing of Nanocomposite Hydrogels

et al. 2018

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Cellulose nanocrystals (CNCs) with >2000 photoactive groups on each can act as highly efficient initiators for radical polymerizations, cross-linkers, as well as covalently embedded nanofillers for nanocomposite hydrogels. This is achieved by a simple and reliable method for surface modification of CNCs with a photoactive bis(acyl)phosphane oxide derivative. Shape-persistent and free-standing 3D structured objects were printed with a mono-functional methacrylate, showing a superior swelling capacity and improved mechanical properties.

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3D printable light-responsive polymers

Cited by 101 publications

References 47 publications

Bioinspired 3D-printed piezoelectric device for acoustic frequency separation

Bioinspired 3D-printed piezoelectric device for acoustic frequency separation

Stress Reduction of 3D Printed Compliance‐Tailored Multilayers

All‐in‐One Cellulose Nanocrystals for 3D Printing of Nanocomposite Hydrogels

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