Nature:一种“超分子橡胶”新材料

橡胶=小余

当一个橡胶带断裂后，我们的办法是换一个新的。但本期Nature上描述的一种引人瞩目的新材料的行为却很不相同。这种新材料由包含三种不同官能团的分子组成，三个官能团形成多个氢键，这些分子一起形成一种“超分子橡胶”，既包含链形结构，又包含交联结构。这个体系具有橡胶一样的行为，即当被拉长到其原始长度几倍的长度时，它们能够恢复到原始长度。与由大分子构成的传统橡胶相比，这种材料在断裂后，如将断面在室温下放到一起，它们还能自我愈合。这种新材料可以用简单的成分（脂肪酸和尿素）来合成，而一旦合成之后，再加工就比较容易了。按照其目前的形势，这种超分子橡胶在压力下恢复较慢，在应力作用下会发生“蠕变”，但通过调整起始组分，可以获得一系列不同性能。

之见

神奇的高分子，泼水可收

欢乐宋

很神奇啊，不知道离产业化还有多远

jichuhui

原帖由 橡胶=小余 于 2010-6-2 13:53 发表

                               
登录/注册后可看大图

当一个橡胶带断裂后，我们的办法是换一个新的。但本期Nature上描述的一种引人瞩目的新材料的行为却很不相同。这种新材料由包含三种不同官能团的分子组成，三个官能团形成多个氢键，这些分子一起形成一种“超分子橡胶 ...

8 H4 B( s$ Y, ~( k" i耐温性能如何？？？

平常心

Nature 451, 977-980 (21 February 2008) | doi:10.1038/nature06669; Received 14 August 2007; Accepted 11 January 2008
Self-healing and thermoreversible rubber from supramolecular assembly
Philippe Cordier, Franois Tournilhac, Corinne Soulié-Ziakovic & Ludwik Leibler
$ F- b/ f% k6 }2 g4 ~* z$ kMatière Molle et Chimie, UMR 7167 CNRS-ESPCI, Ecole Supérieure de Physique et Chimie Industrielles, 10 rue Vauquelin, 75005 Paris, France
0 l4 Y( Y! Z" i, Q9 R6 nCorrespondence to: Ludwik Leibler1 Correspondence and requests for materials should be addressed to L.L.).
Top of pageRubbers exhibit enormous extensibility up to several hundred per cent, compared with a few per cent for ordinary solids, and have the ability to recover their original shape and dimensions on release of stress. Rubber elasticity is a property of macromolecules that are either covalently cross-linked or connected in a network by physical associations such as small glassy or crystalline domains, ionic aggregates6 or multiple hydrogen bonds. Covalent cross-links or strong physical associations prevent flow and creep. Here we design and synthesize molecules that associate together to form both chains and cross-links via hydrogen bonds. The system shows recoverable extensibility up to several hundred per cent and little creep under load. In striking contrast to conventional cross-linked or thermoreversible rubbers made of macromolecules, these systems, when broken or cut, can be simply repaired by bringing together fractured surfaces to self-heal at room temperature. Repaired samples recuperate their enormous extensibility. The process of breaking and healing can be repeated many times. These materials can be easily processed, re-used and recycled. Their unique self-repairing properties, the simplicity of their synthesis, their availability from renewable resources and the low cost of raw ingredients (fatty acids and urea) bode well for future applications.

hjj456789

“超分子橡胶”新材料，是假设，还是已有产品

姜平辉

很神气的新材料丶长知识了

平常心

我看了一下，应该是2008年的技术资料了吧？

lwg010927

类似于“记忆金属”。
' }4 O3 m$ w# R* }; s材料领域的突破，其意义是革命性的！

wxg1982

很有前途，不知道离产业化还有多久。