Surfaces get smooth or bumpy on demand

Polymer material produced by a 3-D printer includes soft, flexible material (clear or lighter tone) with particles of hard material (black) embedded, in predetermined arrangements. When the material is compressed, its surface become bumpy in a pattern determined by the hard particles. Photo: Felice Frankel
Polymer material produced by a 3-D printer includes soft, flexible material (clear or lighter tone) with particles of hard material (black) embedded, in predetermined arrangements. When the material is compressed, its surface become bumpy in a pattern determined by the hard particles.
Photo: Felice Frankel

MIT research produces soft material with controllable surface textures that can be varied by squeezing

An MIT team has developed a way of making soft materials, using a 3-D printer, with surface textures that can then be modified at will to be perfectly smooth, or ridged or bumpy, or even to have complex patterns that could be used to guide fluids.

The process, developed using detailed computer simulations, involves a material that is composed of two different polymers with different degrees of stiffness: More rigid particles are embedded within a matrix of a more flexible polymer. When squeezed, the material’s surface changes from smooth to a pattern determined by the spacing and shapes of the implanted harder particles; when released, it reverts back to the original form.

The findings, which the researchers say could lead to a new class of materials with dynamically controllable and reversible surface properties, are reported in a paper in the journal Advanced Functional Materials co-authored by MIT graduate student Mark Guttag and Mary Boyce, a former MIT professor of mechanical engineering who is now dean of engineering at Columbia University.

“Depending on the arrangement of the particles, using the same amount of compression, you can get different surface topographies, including ridges and bumps, along the surface,” says Guttag, who is pursuing the research as part of his doctoral thesis in mechanical engineering.

This animated simulation shows how embedded hard particles within a softer flexible material produce a textured surface when compressed. (Animation by Mark Guttag)

The system can produce simple, repetitive patterns of bumps or creases, which could be useful for changing the aerodynamic resistance of an object, or its reflectivity. But by arranging the distribution of the hard particles, it can also be used to produce highly complex surface textures — for example, creating microfluidic channels to control the movement of liquids inside a chemical or biological detector, Guttag says.

For instance, such a device could have a smooth, tilted surface allowing fluids to flow evenly across its surface — but with the added ability, on demand, to create raised sections and depressions that would separate the flow of liquids.

Surface textures can be important in a variety of applications, including camouflage, making surfaces that repel or attract water, controlling the motion and turbulence of fluids, and limiting the buildup of organisms on surfaces such as ship hulls. There are many ways to produce patterning as a fixed, unvarying surface, but for some uses — including drag reduction and camouflage — changeable and nonuniform textures could have added benefit.

“There are no previous techniques that provide comparable flexibility for creating dynamically and locally tunable and reversible surface changes,” Guttag and Boyce write in their paper.

Because the system is “all geometry driven,” Guttag says — based on the shapes and spacing of materials with different degrees of flexibility — “it could be scaled to all different sizes, and the same principles should work.”

While this research used physical pressure to control texture, the same design principles could be used to modify materials using other stimuli — such as through application of an electric charge, or by changing temperature or humidity, Guttag adds.

Read more: Surfaces get smooth or bumpy on demand

 

The Latest on: Controllable surface textures

[google_news title=”” keyword=”Controllable surface textures” num_posts=”10″ blurb_length=”0″ show_thumb=”left”]

via Google News

 

The Latest on: Controllable surface textures
  • Can the new Surface Laptop really take down the M3 MacBook Air?
    on May 22, 2024 at 5:00 pm

    Both laptops have 13-inch and 15-inch class versions. The Surface Laptop 13.8-inch model starts at $1,000 for a Qualcomm Snapdragon X Plus chipset, 16GB of RAM, and a 256GB SSD. The M3 MacBook Air ...

  • The best Minecraft texture packs for 1.20
    on May 22, 2024 at 4:27 pm

    If you're using Bedrock Edition, you can find a few custom textures available through the Minecraft Catalog, so take a look at those if you're needing Bedrock options. For any packs on the list ...

  • The new Surface Pro and Laptop are up for preorder — are these AI laptops worth the hype?
    on May 20, 2024 at 12:49 pm

    The ongoing race for the title of best laptop just got more/ interesting, as Microsoft just dropped the new 2024 versions of its Surface Pro and Surface Laptop, its flagship contenders to beat the ...

  • Microsoft’s new Surface Pro gets an OLED display for the first time
    on May 20, 2024 at 10:49 am

    The LCDs on previous Surface Pros (and on the business edition Surface Pro 10) were already impressive in terms of color accuracy and sharpness, but Microsoft always stuck to traditional ...

  • The Best Microsoft Surface in 2024
    on May 19, 2024 at 5:00 pm

    2-in-1 Laptops are great for versatility, making them perfect for professionals, students, or entertainment— and here are Game Rant's top picks. The Surface family is expanding rapidly every ...

  • Optimised Surface Finishing for Additive Manufacturing
    on May 16, 2024 at 5:00 pm

    With 4D_Additive, VDI surface textures are generated directly on the CAD models to eliminate the stairstepping effects in 3D printing. Image Credit: CoreTechnologie GmbH The 3D printing software ...

  • Best Surface Pro docks and docking stations 2024
    on May 13, 2024 at 3:10 pm

    The best docking stations for Surface Pro devices can turn your Windows 2-in-1 into the centerpiece of a productive desktop workstation. The Surface Pro 9 features Thunderbolt 4, opening it up to ...

  • Best Microsoft Surface PCs in 2024
    on April 30, 2024 at 1:32 am

    The best Microsoft Surface PCs encompass a rather wide range of hardware designed to accommodate plenty of users and workloads. Surface hardware has long been the standard for other laptop makers ...

  • Outdoor Linear Luminaries
    on November 26, 2023 at 10:02 pm

    This type of grazing light enhances surface textures and creates positive-negative ... lighting effects and video reproduction, that is controllable using Art-Net systems.

  • Textures and Surfaces
    on November 6, 2023 at 9:06 pm

    EGGER's woodgrain textures are created with matt-gloss effects ... Moreover, the PerfectSense Matt lacquer system gives the surface a pleasant matt feel and anti-fingerprint properties, making ...

via  Bing News

 

What's Your Reaction?
Don't Like it!
0
I Like it!
0
Scroll To Top