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Predicting the Thermal Behavior in functional Textile fibers Having Embedded Electronics

Advanced Fiber Materials 2022年第6期4卷 1609-1619页

作者： Shaun Berry Shawn Redmond Tairan Wang Mordechai Rothschild MIT Lincoln Laboratory 244 Wood StreetLexingtonMA 02421USA

In this paper,both steady-state and transient thermal simulations were performed on functional fibers having an embedded electronic chip acting as a heat source.Simulations were conducted for a range of different fiber materials and arbitrary fiber cross-sectional shapes.We show that under steady-state heating conditions,the thermal response for any arbitrary fiber shape and fiber material system was convection dominated regardless of the effective thermal conductivity of the fiber,and that the corresponding temperature rise within the fiber can be predicted analytically allowing for the maximum temperature to be estimated for any known heat load and fiber geometry.In the case of transient heating,we show that for pulsed power operation of the embedded electronic device,the maximum temperature reached in the fiber is always greater than the maximum temperature of the equivalent steady-state average power.However,high peak powers can be safely achieved if the power-on pulse time and duty cycle are selected to limit the maximum temperature reached in the fiber.Based on the results from the transient simulations,a set of criteria was developed to determine whether the operating conditions would be:(1)allowable for the fiber system,thus requiring no transient simulations,(2)requiring a transient simulation to verify that the maximum temperature is acceptable,and(3)the operating conditions are too severe and device operation at these conditions are not practical.

关键词： functional fibers Smart fibers Thermal modeling Fabrics MOEMS

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A 'Moore's law' for fibers enables intelligent fabrics

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National Science Review 2023年第1期10卷 68-86页

作者： Shengtai Qian Mingyang Liu Yuhai Dou Yoel Fink Wei Yan School of Electrical and Electronic Engineering Nanyang Technological University Institute for Energy Materials Science University of Shanghai for Science and Technology Research Laboratory of Electronics Massachusetts Institute of Technology School of Materials Science and Engineering Nanyang Technological University

Fabrics are an indispensable part of our everyday life.They provide us with protection,offer privacy and form an intimate expression of ourselves through their esthetics.Imparting functionality at the fiber level represents an intriguing path toward innovative fabrics with a hitherto unparalleled functionality and value.The fiber technology based on thermal drawing of a preform,which is identical in its materials and geometry to the final fiber,has emerged as a powerful platform for the production of exquisite fibers with prerequisite composition,geometric complexity and control over feature size.A ’Moore’ s law’ for fibers is emerging,delivering higher forms of function that are important for a broad spectrum of practical applications in healthcare,sports,robotics,space exploration,etc.In this review,we survey progress in thermally drawn fibers and devices,and discuss their relevance to ’smart’ fabrics.A new generation of fabrics that can see,hear and speak,sense,communicate,harvest and store energy,as well as store and process data is anticipated.We conclude with a critical analysis of existing challenges and opportunities currently faced by thermally drawn fibers and fabrics that are expected to become sophisticated platforms delivering value-added services for our society.

关键词： functional fibers fiber electronics and optoelectronics intelligent fabrics wearable electronics fabric computation human-interfaced bioelectronics

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