Ultra-strong long-chain polyamide elastomers with programmable supramolecular interactions and oriented crystalline microstructures
Ultra-strong long-chain polyamide elastomers with programmable supramolecular interactions and oriented crystalline microstructures
复制标题
具有可编程超分子相互作用和定向晶体微观结构的超强长链聚酰胺弹性体
DOI：
10.1038/s41467-019-09218-6
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发表时间：
2019-03-21
影响因子：
16.6
通讯作者：
Tang, Chuanbing
中科院分区：
文献类型：
--
作者：
Song, Lingzhi;Zhu, Tianyu;Tang, Chuanbing
聚酰胺是最重要的聚合物之一。长链脂肪族聚酰胺可以弥补传统聚酰胺与聚乙烯之间的差距。在这里，我们报告了一种方法来制备可持续的超强弹性体从生物质衍生的长链聚酰胺硫醇烯加成共聚与二酰胺二烯单体。酰胺之间的侧链极性羟基和非极性丁酸酯基团允许超分子氢键的受控编程和聚合物链结晶的容易调节。主链上硫醚基团的存在可进一步诱导金属-配体配位（亚铜-硫醚）。单向步进循环拉伸变形已应用于这些聚酰胺，并显着提高拉伸强度超过210 MPa，同时保持弹性。单轴变形导致晶体微结构的重排和排列，这是机械增强的原因。观察到这些无发色团的聚酰胺具有归因于聚集诱导发射（AIE）的效果的强发光，所述聚集诱导发射源自具有受限分子运动的酰胺簇的形成。
Polyamides are one of the most important polymers. Long-chain aliphatic polyamides could bridge the gap between traditional polyamides and polyethylenes. Here we report an approach to preparing sustainable ultra-strong elastomers from biomass-derived long-chain polyamides by thiol-ene addition copolymerization with diamide diene monomers. The pendant polar hydroxyl and non-polar butyrate groups between amides allow controlled programming of supramolecular hydrogen bonding and facile tuning of crystallization of polymer chains. The presence of thioether groups on the main chain can further induce metal–ligand coordination (cuprous-thioether). Unidirectional step-cycle tensile deformation has been applied to these polyamides and significantly enhances tensile strength to over 210 MPa while maintaining elasticity. Uniaxial deformation leads to a rearrangement and alignment of crystalline microstructures, which is responsible for the mechanical enhancement. These chromophore-free polyamides are observed with strong luminescence ascribed to the effect of aggregation-induced emission (AIE), originating from the formation of amide clusters with restricted molecular motions.