一步法辐射合成具有极优机械性能的琼脂糖/聚丙烯酰胺双重网络水凝胶。
One-step radiation synthesis of agarose/polyacrylamide double-network hydrogel with extremely excellent mechanical properties.
机构信息
Beijing National Laboratory for Molecular Sciences, Radiochemistry and Radiation Chemistry Key Laboratory of Fundamental Science, The Key Laboratory of Polymer Chemistry and Physics of the Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China.
Beijing National Laboratory for Molecular Sciences, The Key Laboratory of Polymer Chemistry and Physics of the Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China.
出版信息
Carbohydr Polym. 2018 Nov 15;200:72-81. doi: 10.1016/j.carbpol.2018.07.070. Epub 2018 Jul 25.
A facile one-step radiation method is first developed to synthesize agarose/polyacrylamide (AG/PAM) double-network (DN) hydrogel. Compared to other synthetic methods of DN hydrogels, our synthesis method endows the resultant AG/PAM DN hydrogel with not only top-level tensile properties with a tensile strength of 1263 ± 59 kPa and an elongation at break of 3406 ± 143%, but also highest compression properties with a compression strength of 140 ± 3 MPa and a fracture compression strain of above 99.9%. An expanding-necking phenomenon during compression process of AG/PAM DN hydrogel were observed. We propose a chain pushing-in model to interpret the energy dissipation mechanism accounting for the super-compressibility of AG/PAM DN hydrogel. This novel radiation synthesis strategy provides an insight into the development of DN hydrogels with extremely excellent mechanical properties.
一种简单的一步辐射法被首次开发用于合成琼脂糖/聚丙烯酰胺（AG/PAM）双网络（DN）水凝胶。与其他 DN 水凝胶的合成方法相比，我们的合成方法不仅赋予所得的 AG/PAM DN 水凝胶具有顶级的拉伸性能，其拉伸强度为 1263 ± 59 kPa，断裂伸长率为 3406 ± 143%，而且还具有最高的压缩性能，压缩强度为 140 ± 3 MPa，断裂压缩应变超过 99.9%。在 AG/PAM DN 水凝胶的压缩过程中观察到了颈缩现象。我们提出了一个链推进模型来解释能量耗散机制，该机制解释了 AG/PAM DN 水凝胶的超压缩性。这种新的辐射合成策略为开发具有极佳机械性能的 DN 水凝胶提供了新的思路。
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