On the role of interface polymers for the mechanics of natural polymeric composites
On the role of interface polymers for the mechanics of natural polymeric composites
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DOI：
10.1039/b411986j
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发表时间：
2004-01-01
影响因子：
3.3
通讯作者：
Gupta, HS
中科院分区：
文献类型：
--
作者：
Fratzl, P;Burgert, I;Gupta, HS
对肌腱和木材变形机制的研究表明，这些组织的变形主要是通过剪切刚性纤维之间的软基质。为了使这种类型的复合材料既坚固又坚韧，需要基质和纤维之间的紧密结合。最近的研究结果表明，自然界可能已经进化出特殊的界面聚合物，既能结合到纤维上，又能形成基质。蛋白聚糖可以通过其蛋白质样末端与胶原原纤维结合并通过其糖样末端形成水性基质来在肌腱中发挥这种作用。半纤维素可以在植物细胞壁中发挥类似的作用，因为它们与纤维素原纤维结合并在它们之间形成含水网络。这一观察结果表明，新的仿生复合材料可能会开发的基础上的两亲性聚合物能够绑定到刚性纤维，并在它们周围形成凝胶状基质。
Research on the deformation mechanisms of tendons and wood has shown that these tissues deform mostly by shearing of a soft matrix between stiff fibres. For this type of composite to be both strong and tough, tight binding between matrix and fibres is required. Recent results suggest that Nature may have evolved special interface polymers, capable both of binding to the fibres and of forming a matrix. Proteoglycans could play this role in tendons by binding to collagen fibrils with their protein-like ends and by forming an aqueous matrix with their sugar-like ends. Hemicelluloses could play a similar role in the plant cell wall, as they are binding to cellulose fibrils and forming aqueous networks between them. This observation suggests that new biomimetic composites might be developed on the basis of amphiphilic polymers capable of binding to stiff fibres and of forming a gel-like matrix around them.