相分离诱导的聚丙酰胺水凝胶的反常增硬、增韧和自修复。
Phase-Separation-Induced Anomalous Stiffening, Toughening, and Self-Healing of Polyacrylamide Gels.
机构信息
Laboratory of Soft and Wet Matter, Graduate School of Life Science, Hokkaido University, Kita-10, Nishi-8, Kita-ku, Sapporo, Hokkaido, 060-0810, Japan.
Laboratory of Soft and Wet Matter, Faculty of Advanced Life Science, Hokkaido University, Kita-10, Nishi-8, Kita-ku, Sapporo, Hokkaido, 060-0810, Japan.
出版信息
Adv Mater. 2015 Nov 18;27(43):6990-8. doi: 10.1002/adma.201502967. Epub 2015 Oct 1.
Novel, tough, strong, and self-healable poly-acrylamide (PAAm) gels are fabricated by inducing an appropriate phase-separation structure using a poor solvent. The phase separation induces a gel-glass-like transition of the PAAm gels, providing the gels an anomalously high modulus (211 MPa), fracture stress (7.13 MPa), and fracture energy (4.16 × 10(4) J m(-2)), while keeping a high solvent content (≈60 vol%).
新型坚韧高强自修复聚（丙烯酰胺）（PAAm）水凝胶是通过使用不良溶剂诱导形成适当的相分离结构来制备的。相分离诱导 PAAm 水凝胶发生凝胶-玻璃化转变，赋予水凝胶异常高的模量（211 MPa）、断裂应力（7.13 MPa）和断裂能（4.16×10(4) J m(-2))，同时保持较高的溶剂含量（≈60 vol%）。
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