Roll-to-Roll Manufacturing of Micropatterned Adhesives by Template Compression

Yu, Dan; Beckelmann, Dirk; Opsölder, Michael; Schäfer, Bruno; Moh, Karsten; Hensel, René; Oliveira, Peter William de; Arzt, Eduard

doi:10.3390/ma12010097

Cited by 25 publications

(8 citation statements)

References 42 publications

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“…[ 2 ] Among others, [ 15–17 ] mushroom‐shaped tips are frequently used as terminal ends of the micropillars. [ 18–20 ] The thin flaps of the mushroom‐shaped tips are associated with reduction of the stress singularities at the edges of the adhesive contact, which, in turn, delays separation. [ 21–23 ] To improve and optimize micropatterned dry adhesives, intense research has been conducted over the last two decades.…”

Section: Introductionmentioning

confidence: 99%

Contact Aging Enhances Adhesion of Micropatterned Silicone Adhesives to Glass Substrates

Thiemecke

Hensel

2020

Adv Funct Materials

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The transfer of biological concepts into synthetic micropatterned adhesives has recently enabled a new generation of switchable, reversible handling devices. Over the last two decades, many design principles have been explored that helped to understand the underlying mechanics and to optimize such adhesives for certain applications. An aspect that has been overlooked so far is the influence of longer hold times on the adhesive contacts. Exemplarily, the pull-off stress and work of separation of a micropatterned adhesive specimen are enhanced by factors 3 and 6, respectively, after 1000 min in contact with a glass substrate. In addition to such global measures, the increase of adhesion of all individual micropillars is analyzed. It is found that contact aging varied across the microarray, as it drastically depends on local conditions. Despite great differences on the micropillar scale, the adhesion of entire specimens increased with very similar power laws, as this is determined by the mean contact ageing of the individual structures. Overall, contact aging must be critically evaluated before using micropatterned adhesives, especially for long-term fixations and material combinations that are chemically attractive to each other.

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Section: Introductionmentioning

confidence: 99%

Contact Aging Enhances Adhesion of Micropatterned Silicone Adhesives to Glass Substrates

Thiemecke

Hensel

2020

Adv Funct Materials

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“…Several efforts have been made to commercialize bioinspired dry adhesives (Nanogriptech R , Geckskin R , and Gecko R Nanoplast R ). In particular, continuous fabrication techniques based on a roll-to-roll process have been successfully applied to the large-scale fabrication of bioinspired dry adhesives (Sameoto and Ferguson, 2014;Yi et al, 2014;Lee et al, 2018;Yu et al, 2019). Despite these efforts, the complex microstructural features (e.g., suction cups, mushrooms with angled tips) (Wang et al, 2019b) or additional chemical treatments (Lee et al, 2007;Zhao et al, 2017) impede the fabrication process and lower yields in continuous manufacturing, which need to be overcome for the widespread use of bioinspired adhesives.…”

Section: Discussionmentioning

confidence: 99%

Applications of Bioinspired Reversible Dry and Wet Adhesives: A Review

et al. 2021

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Bioinspired adhesives that emulate the unique dry and wet adhesion mechanisms of living systems have been actively explored over the past two decades. Synthetic bioinspired adhesives that have recently been developed exhibit versatile smart adhesion capabilities, including controllable adhesion strength, active adhesion control, no residue remaining on the surface, and robust and reversible adhesion to diverse dry and wet surfaces. Owing to these advantages, bioinspired adhesives have been applied to various engineering domains. This review summarizes recent efforts that have been undertaken in the application of synthetic dry and wet adhesives, mainly focusing on grippers, robots, and wearable sensors. Moreover, future directions and challenges toward the next generation of bioinspired adhesives for advanced industrial applications are described.

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“…However, these templates are incredibly complex to manufacture, and their fabrication rates are too low to achieve largearea or largevolume nanoparticle con trols. [406][407][408][409][410][411] Thus, there is a need to innovate a largescale sur face patterning technique, such as 3D printing, that can gain orientational and positional control of nanoparticles. [412] Methods that can direct nanoparticle assembly do exist.…”

Section: D Printed Surface Patterning-directed Assemblymentioning

confidence: 99%

3D Printing‐Enabled Nanoparticle Alignment: A Review of Mechanisms and Applications

Jambhulkar

Ravichandran

et al. 2021

Small

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3D printing (additive manufacturing (AM)) has enormous potential for rapid tooling and mass production due to its design flexibility and significant reduction of the timeline from design to manufacturing. The current state-of-the-art in 3D printing focuses on material manufacturability and engineering applications. However, there still exists the bottleneck of low printing resolution and processing rates, especially when nanomaterials need tailorable orders at different scales. An interesting phenomenon is the preferential alignment of nanoparticles that enhance material properties. Therefore, this review emphasizes the landscape of nanoparticle alignment in the context of 3D printing. Herein, a brief overview of 3D printing is provided, followed by a comprehensive summary of the 3D printing-enabled nanoparticle alignment in wellestablished and in-house customized 3D printing mechanisms that can lead to selective deposition and preferential orientation of nanoparticles. Subsequently, it is listed that typical applications that utilized the properties of ordered nanoparticles (e.g., structural composites, heat conductors, chemo-resistive sensors, engineered surfaces, tissue scaffolds, and actuators based on structural and functional property improvement). This review's emphasis is on the particle alignment methodology and the performance of composites incorporating aligned nanoparticles. In the end, significant limitations of current 3D printing techniques are identified together with future perspectives.

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Roll-to-Roll Manufacturing of Micropatterned Adhesives by Template Compression

Cited by 25 publications

References 42 publications

Contact Aging Enhances Adhesion of Micropatterned Silicone Adhesives to Glass Substrates

Contact Aging Enhances Adhesion of Micropatterned Silicone Adhesives to Glass Substrates

Applications of Bioinspired Reversible Dry and Wet Adhesives: A Review

3D Printing‐Enabled Nanoparticle Alignment: A Review of Mechanisms and Applications

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