Archive for Textile

Optical Fibers are now Wearable!

One of the cool projects that I presented last week at TechConnect Summit (which by the way was a great success. Congrats to Jennifer for the organization!), is a wearable photonic colored fibers developed by Pr. Maksim Skorobagatiy at Ecole Polytechnique de Montreal.

Smart textiles are now everywhere (Frost and Sullivan estimates that in 2020, 80% of the textile will be smart!). Applications already include interactive clothing for sports, hazardous occupations, and military, industrial textiles with integrated sensors or signage, fashion accessories and apparel with unique and variable appearance, etc…

Mainly because of their commercial availability but also their low cost, photonics textile manufacturers usually use silica glass-based telecommunication fibers which cause several challenges in the textile world (How to extract the color from the fiber core? How to generate the color? How to weave them? etc…).

Here comes Pr. Skorobogatiy’s invention!

Instead of using glass-based fibers, he proposes to use photonics crystal fibers made of different layers of polymers which will act as a spectral filter. Therefore, from a single white light source, only a given color will be leaked out of the fiber.
No more need to paint the fiber or to use 3 RGB LED, the color is defined by the fiber design itself (geometry, polymers used, etc…)!

Finally, one of the cool properties of Maksim’s fibers is their ability to change color by mixing the reflected ambient light with the irradiated guided light (inside the fiber).
Under the daylight illumination, and in the absence of guided light, in the fiber is still colored. Consequently, when both the ambient illumination and guided light are present, the overall color of the fiber will be determined by mixing of the two colors in the radiation far field (ex : green + red = yellow).

Applications of this new invention include the development of variable colored uniforms or signs. It could also be used as an anti‐counterfeit label or an intelligent jewelry.

Check out the prototypes’ pictures on Pr. Skorobogatiy’s website. They’re amazing!

As usual, I welcome your comments and feedbacks! Any other idea of applications?

Thomas

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Leaving to TechConnect Summit

TechConnect Summit 2009Hello,

After a wonderful sunny week-end, I’m leaving to Houston to attend TechConnect Summit 2009. This year, 5 of Univalor’s technologies have been accepted.

In case you are attending, I’ll be at Univalor’s booth (# 1029). I’ll also be sending updates on Twitter #TechConnect.

Visual Cortical Implant

Developed by Pr. Mohamad Sawan and his team at the Polystim neurotechnologies Laboratory , this electrical platform allows blinds to recover vision. This system consists of a miniaturized implant connected to the cortex and communicating to a camera (which acts as an eye prosthesis). Pr. Sawan’s visual prosthesis project passed the stage of perfecting a first generation functional prototype (proof of concept). Now, in view of confirming complete validation, elaborated in vivo tests must be made in collaboration with medical research institutes in Montreal.

MR-SUB: The “Fantastic Voyage”

Because of the high number of patients diagnosed with cancer, tumor targeting, target chemotherapy and chemoembolization are of special interest for modern medicine. Nevertheless, many tumors are still out of reach to catheterization (in particular the ones that must be targeted in regions only accessible through smaller diameter vessels). Some 40 years after the release of the “Fantastic Voyage”, Prof. Martel came up with the solution. He developed a MRI based platform which enables to reach targets usually inaccessible to catheterization. Its applications include cells targeting, chemo-embolization and local hyperthermia.

Color-Changing and Color-Tunable Photonic Crystal Fiber for Textiles

“Smart textiles” are already everywhere. Essentially used for their technical performances and their functional properties, they are forecasted to represent 80 % of textiles by 2020. Current photonic textiles, usually made from conventional optical fibers (fiberglasses, usually used in telecommunications), have been shown to be limited in terms of applications since they cannot be woven and don’t provide a uniform coloration in time. Prof. Skorobogatiy proposes to use plastic fibers constituted by successive layers of polymers. From a single light source, Pr. Skorobogatiy’s fibers naturally emit a homogenous color which is controllable in real-time. Furthermore, since they are made of polymers, they can be easily woven using a common loom.

High Resolution Refractometer

In the past decades, the flow cytometry technologies became a routine test for counting, and discriminating microscopic particles in a stream of fluid. To better discriminate each cell type, these techniques require a first step of fluorescence labeling. This step makes difficult to reuse the sample for further experimentations. Using a refractometer as a detector permits to skip this step. The Prof. Yves-Alain Peter and his team introduce a low cost and high resolution refractometer. Due to its organization, it is capable to characterize a particle in a volume. All its components are fabricated simultaneously in one conventional microfabrication process.

Direct Writing of Freefrom 3D Microstructures

Many methods allow the fabrication of microscopic pieces. However, because of technological limitations, they have been confined to relatively thin device architectures (a few layers) and are limited by materials constraints. To overcome these limitations, Prof. Therriault proposes a radiation-assisted direct-writing approach which allows manufacturing in a straightforward manner and in ambient conditions 3D functionalized microstructures.

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The Duo Gown: From Term Project To Commercialization

In 2006, Noémi Marquis, an undergraduate student at Université de Montréal’s School of Industrial Design, came up with a new design of the traditional hospital gown as her final-year project. Supervised by Prof. Denyse Roy, Director of the School’s Meta-Textile Laboratory, she has been developing the Duo Gown.
Compared to current gowns, the Duo Gown covers the entire body by means of two half-gowns worn simultaneously. Then, there are no potentially embarrassing openings for the patients. Furthermore, since it has no draw strings, it gives easy access by physicians, nurses and other health professionals.
Thanks to the persistence of the researchers and of Mr. Pierre Patenaude, a Research Officer with UdeM’s Office of Research Services and Development, this story did not end there. It has been transmitted to Univalor, which filed an US patent and started commercial discussions with potential partners. Later, a license agreement has been signed with a Quebec company.
The Duo Gown has also been widely publicized across Quebec and Canada: Radio Canada, 24 heures, Advantage Research. Hopefully it will become soon a commercial success.

New Files
In the meantime, Pierre has just sent us 4 new projects arising from University of Montreal School of Industrial Design. As usual, you should read here about these innovations within a few weeks…

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