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Category Archives: Fashion

Researchers make comfortable materials that generate power when worn

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Researchers have demonstrated new wearable technologies that both generate electricity from human movement and improve the comfort of the technology for the people wearing them. The work stems from an advanced understanding of materials that increase comfort in textiles and produce electricity when they rub against another surface.

At issue are molecules called amphiphiles, which are often used in consumer products to reduce friction against human skin. For example, amphiphiles are often incorporated into diapers to prevent chafing.

“We set out to develop a model that would give us a detailed fundamental understanding of how different amphiphiles affect the surface friction of different materials,” says Lilian Hsiao

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Specifically, we wanted to know if we could create energy from friction in amphiphile-modified materials. It turns out we could not only generate electricity, but we could do so while also reducing the friction that people wearing these materials experience.”

In other words, the researchers found they could use amphiphiles to create wearable fabrics with slippery surfaces that feel good against human skin.

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“The technology for harvesting static energy is well established but devices that can be worn for long periods of time are still missing.” Hsiao says. “In our proof-of-concept testing, we found these amphiphile materials not only feel good on the skin but could generate up to 300 volts, which is remarkable for a small piece of material.”

“An optimal balance between friction needed to generate power and maintaining the comfort of the wearer is paramount in designing haptic technologies and amphiphile chemistry offers a facile way to do so,” Khan says. “We’re interested in doing more to make use of these materials, such as exploring how they can be incorporated into existing haptic devices. And we’re open to working with industry partners on identifying new applications.”

The paper, “Compressing Slippery Surface-Assembled Amphiphiles for Tunable Haptic Energy Harvesters,” will be published Sept. 15 in the journal Science Advances.

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Source: Researchers make comfortable materials that generate power when worn | ScienceDaily

The predictive power of social media data in fashion forecasting

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Fashion and social media are both ever evolving. So why not put the two together? New research in Manufacturing & Service Operations Management says utilizing social media to predict sales of apparel and footwear items based on social media posts and interactions about color is possible and successful.

“We partner with three multinational retailers—two apparel and one footwear—and combine their data sets with publicly available data on Twitter and the Google Search Volume Index. We implement a variety of models to develop forecasts that can be used in setting the initial shipment quantity for an item, arguably the most important decision for fashion retailers,” says Youran Fu of Amazon, one of the study authors.

Despite challenges like short product lifetimes, long manufacturing lead times and constant innovation of fashion products, information can enable efficiency and increased revenue.

“Our findings show that fine-grained social media information has significant predictive power in forecasting color and fit demands months in advance of the sales season, and therefore greatly helps in making the initial shipment quantity decision,” says Marshall Fisher of the University of Pennsylvania.

“The predictive power of including social media features, measured by the improvement of the out-of-sample mean absolute deviation over current practice, ranges from 24% to 57%,” Fisher continues.

The paper, “The Value of Social Media Data in Fashion Forecasting,” proves consistent results across all three retailers. The researchers demonstrate the robustness of the findings over market and geographic heterogeneity, and different forecast horizons.

The researchers note, “Changes in fashion demand are driven more by ‘bottom-up’ changes in consumer preferences than by ‘top-down’ influence from the .”

More information: Youran Fu et al, The Value of Social Media Data in Fashion Forecasting, Manufacturing & Service Operations Management (2023). DOI: 10.1287/msom.2023.1193

Source: The predictive power of social media data in fashion forecasting

Researchers Breed Naturally Flame-Resistant Cotton

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Chemical flame retardants can make us safer by preventing or slowing fires, but they’re linked to a range of unsettling health effects. To get around that concern, researchers with the U.S. Department of Agriculture have bred a new population of cotton that can self-extinguish after encountering a flame.

The team of scientists from the USDA’s Agricultural Research Service, led by Gregory N. Thyssen, bred 10 strains of cotton using alleles from 10 different parent cultivars. After creating fabrics with each of these strains, the researchers put them through burn tests and found that four of them were able to completely self-extinguish. Their work is published today in PLOS One.

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These flame retardant cultivars could be a game-changer in the textile industry. Currently, efforts to make fabric flame retardant include applying chemicals that reduce a material’s ability to ignite; flame retardant chemicals have been added to many fabrics since at least the 1970s. While some have been pulled from the market, these chemicals don’t break down easily, and they can bioaccumulate in humans and animals, potentially leading to endocrine disruption, reproductive toxicity, and cancer. These new strains of cotton could be used to manufacture fabrics and products that have flame retardancy naturally baked in.

Source: Researchers Breed Naturally Flame-Resistant Cotton

Harvard created a wool-like 3D-printable material that can shape shift

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The team, from the John A. Paulson School of Engineering and Applied Sciences (SEAS), created a 3D-printable material that can be “pre-programmed with reversible shape memory.” The wool-like material can remember old forms and morph back into those, or transform into different shapes when a certain stimulus is applied.

It’s made using keratin extracted from recycled wool. Keratin is a fibrous protein that’s found in hair, which, of course, has a habit of returning to its natural form.

The researchers shaped a single chain of keratin into a spring-like structure. They twisted two of those together and used many such “coiled coils” to assemble large fibers. When a stimulus is applied to the material or it’s stretched out, those structures uncoil and the bonds realign. The material stays that way until it’s triggered to return to its original state, which is programmed with a solution of hydrogen peroxide and monosodium phosphate.

In one test, researchers programmed a sheet of keratin to have an origami star as its permanent shape. They dunked the sheet in water to make it malleable and rolled it into a tube. But when the team put that tube in the water again, it unrolled and reformed as the origami star.

The researchers believe the material could help reduce waste in the fashion industry. They suggested it could be used for truly one-size-fits-all clothing that stretches to fit the wearer, or bras “whose cup size and shape can be customized every day.” Consumers could save as well if they don’t have to replace stretched-out clothes quite so often.

“This two-step process of 3D printing the material and then setting its permanent shapes allows for the fabrication of really complex shapes with structural features down to the micron level,” Luca Cera, a SEAS postdoctoral fellow and first author of a paper on the material, said in a press release. “This makes the material suitable for a vast range of applications from textile to tissue engineering.”

Source: Harvard created a wool-like 3D-printable material that can shape shift | Engadget

Romper suit to protect against sudden infant death

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Breathing sensors built into romper suits could help prevent sudden cot deaths in the future. The basis for this is a stretchable printed circuit board that fits to the contours of the body and can be manufactured using routine industrial processes.

Read more at: http://phys.org/news/2013-01-romper-sudden-infant-death.html#jCp

Romper suit to protect against sudden infant death.

Airhead – stop helmet hair

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‘Hemet hair’ is a condition caused by high humidity ironing of the hair under a compressive helmet. The Airhead increases air ventilation to reduce perspiration while creating air space for the hair. The Airhead is easy to fit, anti-static, anti-bacterial and non-allergenic. The new Airhead comes in many different colours and styles to suit your lifestyle.

via airhead product features | Two Wheel Cool.

Computer Engineer Barbie

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Yup, it finally happened,

Barbie® I Can Be…™ dolls and accessories empower girls to play out different roles and “try on” fabulous careers, including computer engineer, the first Barbie® profession chosen by popular vote! Always a reflection of the times, this digital diva engineers the perfect geek-chic look, with hot pink accessories and sleek gadgets to match. The inspiring set also comes with a special code that unlocks career-themed content online, for even more digital play (how fitting)!

http://shop.mattel.com/product/index.jsp?productId=4032107&cp=3719989.3748552