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Home NEWS Science News

Fastener with microscopic mushroom design holds promise

Bioengineer by Bioengineer
January 19, 2021
in Science News
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The design could be a quieter version of velcro with uses ranging from diapers to robotics

IMAGE

Credit: Preeti Sharma

WASHINGTON, January 19, 2021 — A Velcro-like fastener with a microscopic design that looks like tiny mushrooms could mean advances for everyday consumers and scientific fields like robotics.

In Biointerphases, published by AIP Publishing, researchers from Wageningen University in the Netherlands show how the design can use softer materials and still be strong enough to work.

Probabilistic fasteners work, because they are designed with a tiny pattern on one surface that interlocks with features on the other surface. Currently available fasteners, like Velcro and 3M, are called hook and loop fasteners. That design requires harder, stiff material, which is what causes the loud ripping sound when they are peeled off and why they can damage delicate surfaces, such as fabrics, when attached to them.

The team believes a 3D mushroom design can be made with softer, more flexible materials. The half-spherical mushroom shapes provide sufficient interlocking force on the fabric and hold strong.

For the study, the authors used 3D printing combined with molding to create soft surfaces patterned with the tiny mushrooms. That material was then safely attached to three different fabrics and removed without causing damage to them.

“We wanted to prove that, if you go toward these less stiff features, they can be used to attach and detach to soft and delicate surfaces, like fabrics, without damage. It can be used in many applications such as for diapers or silent fasteners for military use,” author Preeti Sharma said. “There is still a lot of research to be done, but the mushroom-shaped design worked quite well for soft mechanical fasteners.”

The design could lead to advances in the field of soft robotics. Soft robotics aims to build robots with designs that mimic living creatures like octopuses, caterpillars, and worms.

In that kind of robotics, interfaces play a significant role. With advances that make the current mushroom design stronger but keep its softness, it could be used to help robots walk on walls and ceilings like a gecko — an animal that can do that because of an attachment-detachment process that’s similar to how probabilistic fasteners work.

The design also could be used on grippers for robots used in farming and other agricultural jobs, Sharma said.

Sharma said more research into the design is needed before it is ready to be used in a commercially available product. Minor changes to the mushroom shape, possibly lengthening or shortening it to make it more effective, could lead to an even better product, she said.

###

The article “Hooked on mushrooms: Preparation and mechanics of a bioinspired soft probabilistic fastener” is authored by Preeti Sharma, Vittorio Saggiomo, Vincent van der Doef, Marleen Kamperman, and Joshua Dijksman. The article appears in Biointerphases on Jan. 19, 2021 (DOI: 10.1116/6.0000634) and can be accessed at https://aip.scitation.org/doi/10.1116/6.0000634.

ABOUT THE JOURNAL

Biointerphases, an AVS journal published by AIP Publishing, emphasizes quantitative characterization of biomaterials and biological interfaces. As an interdisciplinary journal, a strong foundation of chemistry, physics, biology, engineering, theory, and/or modelling is incorporated into originated articles, reviews, and opinionated essays. See https://avs.scitation.org/journal/bip.

ABOUT AVS

AVS is an interdisciplinary, professional society with some 4,500 members worldwide. Founded in 1953, AVS hosts local and international meetings, publishes four journals, serves members through awards, training and career services programs and supports networking among academic, industrial, government, and consulting professionals. Its members come from across the fields of chemistry, physics, biology, mathematics, engineering and business and share a common interest in basic science, technology development and commercialization related to materials, interfaces, and processing.

Media Contact
Larry Frum
[email protected]

Related Journal Article

http://dx.doi.org/10.1116/6.0000634

Tags: Biomechanics/BiophysicsChemistry/Physics/Materials SciencesRobotry/Artificial IntelligenceTechnology/Engineering/Computer Science
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