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Новости химической науки > Сверхэластичный провод растягивается без потери проводимости


29.7.2015
средняя оценка статьи - 1 (2 оценок) Подписаться на RSS

Исследователи из Университета Техаса (Даллас) разработали электропроводный материал, который может быть растянут более чем в 13 раз. Такой материал может найти применение в гибких электронных устройствах и искусственных мышцах.

Рэй Бауман (Ray Baughman) и его коллеги получили суперэластичные проводящие волокна, вкладывая в эластичный стирол-этилен-бутилен-стироловый сополимер [styrene-(ethylene-butylene)-styrene (SEBS)] углеродные нанотрубки, ориентированные вдоль жгута резины. Полученные волокна весьма эластичны, и могут быть растянуты на 1320% от своей исходной длины.

Электрическое сопротивление нового материала при растяжении его в 10 раз увеличивается всего на 5%. Однако включая другие слои проводящих нанотрубок и изоляционных материалов, исследователям удалось получить материал, который при растяжении в 10 раз увеличивает сопротивление на 860% – такой материал может использоваться для изготовления сенсоров напряжения. Дальнейшая работа над новым материалом позволила исследователям получить торсиональное искусственное мышечное волокно, которое сможет использоваться для нагнетания жидкости медицинскими устройствами или для вращения зеркал в оптических схемах.



Способ расположения углеродных нанотрубок позволяет проводам растягиваться без потери электропроводных свойств. (Рисунок из Science, 2015, 349, 400)

Первоначальные исследования в области сверхэластичных проводников позволили разработать только такие провода, электропроводность которых не менялась в значительной степени только при пятикратном растяжении. Ключом к успеху новой работы была ранее опубликованная по применению многостенных углеродных нанотрубок, полученных из аэрогеля. Растягивая эластичный полимер на 1400% от его исходной длины для того, чтобы он смог «обернуть» нанотрубки, исследователям удалось создать интернальную иерархическую структуру, которая, в свою очередь, может служить основой для других структур.

При частичном или полном снятии напряжения слои углеродных нанотрубок выгибаются аксиально, а в дальнейшем приложение или снятие напряжения приводят к тому, что в любом состоянии нанотрубки формируют области с близким и дальним порядком, что позволяет сохранять проводимость материала при различной степени деформации. В дальнейшем использование различных типов резины и различных типов углеродных нанотрубок позволяет изменять исходное сопротивление и другие параметры волокон.

В планах исследователей получение более мощных искусственных мускулов за счет уменьшения диаметра центрального резинового жгута и добавления нескольких слоев ориентированных углеродных нанотрубок, отделенных друг от друга тонкими слоями диэлектрика. Также химики хотят инкорпорировать такие многослойные волокна в текстильные или резинотехнические изделия для того, чтобы получить суперрастяжимые изменяющиеся структуры, способные чувствовать наши собственные движения.

Источник: Science, 2015, 349, 400 (DOI: 10.1126/science.aaa7952)

метки статьи: #нанотехнологии, #новые материалы, #химия полимеров

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anonymous|Thu, 31 Mar 2016 19:24:45 +0300
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The Dunes and Swarovski line of watches coming from Freelook are simply just a glimpse on the great pieces a buyer can expect made by this company.Always driving the envelope to bring trendy concepts onto the actual watch landscape, Freelook has much more to feature.When it concerns Freelook watches the most beneficial is definitely yet that come.They are keeping one eye around the fashion industry with the latest styles anyone eye to the watch industry for ones latest improvements.

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anonymous|Thu, 31 Mar 2016 19:24:44 +0300
Some different versions in this particular line have cow art print dial together with oversized jeweled figures.The dial is also rimmed with jewels.The face of a watch just isn't a conventional round condition, but a oval.These watches complete a statement in a way that is not necessarily too deafening or strong.

The Freelook Swarovski Oval Quartz check out is a further watch coming from Freelook that makes a assertion without expressing anything.This check out is intended for those who are not typically the overtly elegant type.With excellent straps that range from rich reds in order to flashy pinks and also blue hands it truly is anything nonetheless boring.It characteristics roman numerals and a bejeweled bezel.This check out is classic with a twist and made for everyday use.

These watches simply sample to make sure you subtle end of Freelook.This observe company loves to showcase gems, prints and also wild different shades that various watch businesses shy away from.They choose to play all the way up trends and definately will stop with nothing to make sure their clients are continually stylish.The Freelook user is the type of person that is carefree, loves life and also loves on the lookout good.

The Dunes and Swarovski line of watches coming from Freelook are simply just a glimpse on the great pieces a buyer can expect made by this company.Always driving the envelope to bring trendy concepts onto the actual watch landscape, Freelook has much more to feature.When it concerns Freelook watches the most beneficial is definitely yet that come.They are keeping one eye around the fashion industry with the latest styles anyone eye to the watch industry for ones latest improvements.

Swarovski Earrings

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Some different versions in this particular line have cow art print dial together with oversized jeweled figures.The dial is also rimmed with jewels.The face of a watch just isn't a conventional round condition, but a oval.These watches complete a statement in a way that is not necessarily too deafening or strong.

The Freelook Swarovski Oval Quartz check out is a further watch coming from Freelook that makes a assertion without expressing anything.This check out is intended for those who are not typically the overtly elegant type.With excellent straps that range from rich reds in order to flashy pinks and also blue hands it truly is anything nonetheless boring.It characteristics roman numerals and a bejeweled bezel.This check out is classic with a twist and made for everyday use.

These watches simply sample to make sure you subtle end of Freelook.This observe company loves to showcase gems, prints and also wild different shades that various watch businesses shy away from.They choose to play all the way up trends and definately will stop with nothing to make sure their clients are continually stylish.The Freelook user is the type of person that is carefree, loves life and also loves on the lookout good.

The Dunes and Swarovski line of watches coming from Freelook are simply just a glimpse on the great pieces a buyer can expect made by this company.Always driving the envelope to bring trendy concepts onto the actual watch landscape, Freelook has much more to feature.When it concerns Freelook watches the most beneficial is definitely yet that come.They are keeping one eye around the fashion industry with the latest styles anyone eye to the watch industry for ones latest improvements. Earrings blog Earrings About swarovskicrystalonlinestore.top blog

anonymous|Thu, 31 Mar 2016 19:24:43 +0300
Some different versions in this particular line have cow art print dial together with oversized jeweled figures.The dial is also rimmed with jewels.The face of a watch just isn't a conventional round condition, but a oval.These watches complete a statement in a way that is not necessarily too deafening or strong.

The Freelook Swarovski Oval Quartz check out is a further watch coming from Freelook that makes a assertion without expressing anything.This check out is intended for those who are not typically the overtly elegant type.With excellent straps that range from rich reds in order to flashy pinks and also blue hands it truly is anything nonetheless boring.It characteristics roman numerals and a bejeweled bezel.This check out is classic with a twist and made for everyday use.

These watches simply sample to make sure you subtle end of Freelook.This observe company loves to showcase gems, prints and also wild different shades that various watch businesses shy away from.They choose to play all the way up trends and definately will stop with nothing to make sure their clients are continually stylish.The Freelook user is the type of person that is carefree, loves life and also loves on the lookout good.

The Dunes and Swarovski line of watches coming from Freelook are simply just a glimpse on the great pieces a buyer can expect made by this company.Always driving the envelope to bring trendy concepts onto the actual watch landscape, Freelook has much more to feature.When it concerns Freelook watches the most beneficial is definitely yet that come.They are keeping one eye around the fashion industry with the latest styles anyone eye to the watch industry for ones latest improvements.

Swarovski Earrings

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Featured -   [more]

Soulful Large Circle Pendant(1156245)$871.00  $84.00Save: 90% offCrystalline Lady Ballpoint Pen Jonquil(1145323)$290.00  $74.00Save: 74% offRumba Pendant(1125260)$182.00  $80.00Save: 56% off

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Ela Pierced Earrings(936771)Rhodium-plated pierced earrings with a clear crystal chaton, 2 balls set with...$614.00  $89.00Save: 86% off

Emma Pierced Earrings(1730583)This simple yet elegant pair of button pierced earrings will add an additional...$537.00  $75.00Save: 86% off

Evanescent Pierced Earrings(933565)This rhodium-plated pair of stud pierced earrings features Step-cut clear...$874.00  $86.00Save: 90% off

Flowers Perforation Earrings(1023813)This romantic rhodium-plated Earrings boasts incredible attention to detail,...$721.00  $83.00Save: 88% off

Fruity Apple Pierced Earrings(891640)Rhodium-plated pierced earrings with Light Siam crystal apple and leaf in...$361.00  $79.00Save: 78% off

Fruity Cherry Pierced Earrings With Sterling Silver(891638)Rhodium-plated pierced earrings, each with 2 Ruby crystal cherries and leaf in...$367.00  $74.00Save: 80% off

Fruity Lemon Pierced Earrings(891639)Fruity Lemon Pierced Earrings : Rhodium-plated Pierced Earrings With Jonquil...$703.00  $83.00Save: 88% off

Galet Chrysolite Pierced Earrings(1086374)This pair of rhodium-plated pierced earrings subtly glamorises your outfit....$282.00  $79.00Save: 72% off

Galet Clear Crystal Pierced Earrings(665159)This pair of rhodium-plated pierced earrings add a dash of glamour to any...$736.00  $82.00Save: 89% off

Galet Light Amethyst Pierced Earrings(856299)Fresh and beautiful, this pair of rhodium-plated pierced earrings is charming...$805.00  $82.00Save: 90% off

Galet Pierced Earrings(1032280)Galet Pierced Earrings : This Pair Of Gold-plated Pierced Earrings Subtly...$599.00  $75.00Save: 87% off

Garland Leaves Drop Pierced Earrings(992668)A beautiful pair of pierced earrings with distinctive green accents. A perfect...$819.00  $83.00Save: 90% off

Geometric Pierced Earrings Purple(1078028)This Set Of Two Elongated Rhodium-plated Earrings With Unique And Elegant...$518.00  $79.00Save: 85% off

Geometric Pierced Earrings(992680)Geometric Pierced EarringsMake a statement of class with these long,...$524.00  $84.00Save: 84% off

Gillian Clear Crystal Pierced Earrings(1156225)Inspired By Water Droplets, This Refined Pair Of Rhodium-plated Pierced...$412.00  $73.00Save: 82% off

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Copyright В© 2012 All Rights Reserved.

Some different versions in this particular line have cow art print dial together with oversized jeweled figures.The dial is also rimmed with jewels.The face of a watch just isn't a conventional round condition, but a oval.These watches complete a statement in a way that is not necessarily too deafening or strong.

The Freelook Swarovski Oval Quartz check out is a further watch coming from Freelook that makes a assertion without expressing anything.This check out is intended for those who are not typically the overtly elegant type.With excellent straps that range from rich reds in order to flashy pinks and also blue hands it truly is anything nonetheless boring.It characteristics roman numerals and a bejeweled bezel.This check out is classic with a twist and made for everyday use.

These watches simply sample to make sure you subtle end of Freelook.This observe company loves to showcase gems, prints and also wild different shades that various watch businesses shy away from.They choose to play all the way up trends and definately will stop with nothing to make sure their clients are continually stylish.The Freelook user is the type of person that is carefree, loves life and also loves on the lookout good.

The Dunes and Swarovski line of watches coming from Freelook are simply just a glimpse on the great pieces a buyer can expect made by this company.Always driving the envelope to bring trendy concepts onto the actual watch landscape, Freelook has much more to feature.When it concerns Freelook watches the most beneficial is definitely yet that come.They are keeping one eye around the fashion industry with the latest styles anyone eye to the watch industry for ones latest improvements. Earrings blog Earrings About swarovskicrystalonlinestore.top blog



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