| 2 | 1/1 | 返回列表 |
| 查看: 450 | 回復(fù): 1 | |||
csuhcb2000榮譽(yù)版主 (文壇精英)
|
[交流]
新開發(fā)純碳材料具極佳防震特性 已有1人參與
|
|
新開發(fā)純碳材料具極佳防震特性 日本研究者新近開發(fā)出一種純碳材料,這種材料具有極佳防震特性,不僅有延展能力,可自行恢復(fù)原狀,而且耐寒耐熱,有望應(yīng)用于航空工業(yè)及汽車制造業(yè)。 日本產(chǎn)業(yè)技術(shù)綜合研究所材料科學(xué)家許明(音譯)12月2日告訴路透社記者,這種新型材料有如濃稠的蜂蜜,可伸展,可自行復(fù)原。 “它就像是一種有孔的金屬海綿,它由數(shù)以萬億計直徑為5納米的碳管組成,當(dāng)你拉伸它然后松手,它會自己慢慢恢復(fù)原狀,”徐明說。 定于3日出版的《科學(xué)》雜志說,由于這種材料具有良好延展性,因此具有極佳防震性能。同時,在有氧環(huán)境中,它可以耐受的溫度范圍為零下196攝氏度至1000攝氏度。 “這是一種全新和獨特的材料。它可以用于太空領(lǐng)域,用于制造太空飛船或火箭的燃料箱,也可以用于制造汽車引擎,用以避震,”徐明說,“現(xiàn)階段,還沒有其他材料能夠具備相同特性。” 他說,新材料的延展特性有些像橡膠,但它又具有良好的導(dǎo)電性,因此應(yīng)用范圍比橡膠更廣泛。(來源:新華社) Carbon Nanotubes with Temperature-Invariant Viscoelasticity from –196° to 1000°C Ming Xu1, Don N. Futaba1,*, Takeo Yamada1, Motoo Yumura1 and Kenji Hata1,2,* + Author Affiliations 1Technology Research Association for Single Wall Carbon Nanotubes (TASC) and Nanotube Research Center, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, 305-8565, Japan. 2Japan Science and Technology Agency (JST), Kawaguchi, 332-0012, Japan. *To whom correspondence should be addressed. E-mail: kenji-hata@aist.go.jp (K.H.); d-futaba@aist.go.jp (D.N.F.) Abstract Viscoelasticity describes the ability of a material to possess both elasticity and viscosity. Viscoelastic materials, such as rubbers, possess a limited operational temperature range (for example, for silicone rubber it is –55° to 300°C), above which the material breaks down and below which the material undergoes a glass transition and hardens. We created a viscoelastic material composed from a random network of long interconnected carbon nanotubes that exhibited an operational temperature range from –196° to 1000°C. The storage and loss moduli, frequency stability, reversible deformation level, and fatigue resistance were invariant from –140° to 600°C. We interpret that the thermal stability stems from energy dissipation through the zipping and unzipping of carbon nanotubes at contacts. http://www.sciencemag.org/content/330/6009/1364 [ Last edited by csuhcb2000 on 2010-12-7 at 21:18 ] |

|
| 2 | 1/1 | 返回列表 |
| 最具人氣熱帖推薦 [查看全部] | 作者 | 回/看 | 最后發(fā)表 | |
|---|---|---|---|---|
|
[考研] 085601材料工程找調(diào)劑 +16 | oatmealR 2026-03-29 | 17/850 |
|
|---|---|---|---|---|
|
[考研] 311求調(diào)劑 +6 | 冬十三 2026-03-24 | 6/300 |
|
|
[考研] 22408 359分調(diào)劑 +4 | Qshers 2026-03-27 | 6/300 |
|
|
[考研] 298求調(diào)劑 +3 | 種圣賜 2026-03-29 | 3/150 |
|
|
[考研] 356求調(diào)劑 +3 | gysy?s?a 2026-03-28 | 3/150 |
|
|
[考研] 315求調(diào)劑 +4 | akie... 2026-03-28 | 5/250 |
|
|
[考研] 085602 化工專碩 338分 求調(diào)劑 +12 | 路癡小琪 2026-03-27 | 12/600 |
|
|
[考研] 312,生物學(xué)求調(diào)劑 +3 | 小譯同學(xué)abc 2026-03-28 | 3/150 |
|
|
[考研] 0856,材料與化工321分求調(diào)劑 +12 | 大饞小子 2026-03-27 | 13/650 |
|
|
[考研] 考研調(diào)劑 +10 | 呼呼?~+123456 2026-03-24 | 10/500 |
|
|
[考研] 調(diào)劑 +3 | 李嘉圖·S·路 2026-03-27 | 3/150 |
|
|
[考研] 一志愿陜師大生物學(xué)071000,298分,求調(diào)劑 +5 | SYA! 2026-03-23 | 5/250 |
|
|
[考研] 324求調(diào)劑 +8 | hanamiko 2026-03-26 | 10/500 |
|
|
[考研] 342求調(diào)劑 +3 | 加油a李zs 2026-03-26 | 3/150 |
|
|
[考研] 調(diào)劑求收留 +7 | 果然有我 2026-03-26 | 7/350 |
|
|
[考研] 一志愿河工大 081700 276求調(diào)劑 +4 | 地球繞著太陽轉(zhuǎn) 2026-03-23 | 4/200 |
|
|
[考研] 309求調(diào)劑 +4 | gajsj 2026-03-25 | 5/250 |
|
|
[考研] 求b區(qū)院校調(diào)劑 +4 | 周56 2026-03-24 | 5/250 |
|
|
[考研] 各位老師您好:本人初試372分 +5 | jj涌77 2026-03-25 | 6/300 |
|
|
[考研] 材料調(diào)劑 +3 | iwinso 2026-03-23 | 3/150 |
|