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首页> 外文期刊>RSC Advances >Topological structure influences on the gel formation process and mechanical properties of L-lysine based supramolecular gels
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Topological structure influences on the gel formation process and mechanical properties of L-lysine based supramolecular gels

机译：拓扑结构对基于L-赖氨酸的超分子凝胶的凝胶形成过程和力学性能的影响

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摘要

The influence of a minor modification of the topological structure of a gelator's core on the mechanism of the gel formation process and the resultant gel properties were researched by comparing the gelation ability of three L-lysine based gelators with the same arm structures and totally different topological core structures, one of which has a cubic topological polyhedral oligomeric silsesquioxane (POSS) core, one has a regular tetrahedron topological pentaerythritol core and the other has an organic linear topological dodecane core (denoted as POSS-Lys, PER-Lys and C12-Lys). Gelation tests, DSC, rheology measurements, SEM and POM investigations indicate that the gel obtained from C12-Lys with an organic linear topological dodecane core in the same solvent has a much greater strength of hydrogen bonding formed between the gelator molecules and much higher mechanical strength. What is more, POSS-Lys with a cubic topological core has a rather strong recovery ability, while PER-Lys cannot form a gel in any of the solvents tested. The key effect of such an obvious difference is in the self-assembly mechanisms which are influenced by the topological structure of the gelators.
机译：通过比较三种具有相同臂结构和完全不同拓扑结构的L-赖氨酸基胶凝剂的胶凝能力，研究了胶凝剂核心拓扑结构的微小改变对凝胶形成过程机理和所得凝胶性质的影响。核心结构，其中一个具有立方拓扑多面体低聚倍半硅氧烷（POSS）核心，一个具有规则的四面体拓扑季戊四醇核心，另一个具有有机线性拓扑十二烷核心（分别表示为POSS-Lys，PER-Lys和C12-Lys） ）。胶凝测试，DSC，流变学测量，SEM和POM研究表明，在相同溶剂中，由具有有机线性拓扑十二烷核的C12-Lys获得的凝胶，胶凝剂分子之间形成的氢键强度更高，机械强度更高。 。而且，具有立方拓扑核心的POSS-Lys具有相当强的回收能力，而PER-Lys在任何测试的溶剂中均无法形成凝胶。这种明显差异的关键作用在于自组装机制，而自组装机制受胶凝剂拓扑结构的影响。

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