Graphene Oxide/Alginate Hydrogel Fibers with Hierarchically Arranged Helical Structures for Soft Actuator Application,ACS Applied Nano Materials

当前位置： X-MOL 学术 › ACS Appl. Nano Mater. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Graphene Oxide/Alginate Hydrogel Fibers with Hierarchically Arranged Helical Structures for Soft Actuator Application
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2020-05-19 , DOI: 10.1021/acsanm.0c00351
Yumin An _{1,

2} , Limin Gao _{1,

2} , Tianyi Wang _{1,

2}

Affiliation

Hierarchically arranged helical structures were constructed in graphene oxide (GO)/alginate hydrogel fibers by combining the wet spinning and confined drying methods. After fixing both ends of the Ca²⁺-crosslinked GO/alginate hydrogel fibers, multistep twists were utilized to construct hierarchically arranged helical structures during the drying process. The microstructures and tensile mechanical properties of one-, two-, and three-strand hydrogel fibers with hierarchical helical structures were analyzed in detail. The results demonstrated that a combination of high strength (∼2 MPa), high toughness (>5 MJ/m³), and large strain (>700%) could be achieved in the alginate-based hydrogel fibers. The fracture surfaces of the helical hydrogel fibers were studied to reveal the improvement in the mechanical properties. Cyclic tensile tests showed that a hysteresis loop existed in the loading–unloading curves of the helical GO/alginate hydrogel fibers, and a good self-recovery property emerged after resting for a period of time. The actuation performance of the helical GO/alginate fibers in response to water adsorption was also studied in detail. The results showed that the actuation performances could be tuned by the helical structure, and the helical fibers could be applied as a soft actuator.

中文翻译：

分层排列螺旋结构的氧化石墨烯/藻酸盐水凝胶纤维，用于软促动器应用

通过将湿法纺丝和密闭干燥方法相结合，在氧化石墨烯（GO）/藻酸盐水凝胶纤维中构建了分层排列的螺旋结构。在固定Ca ²⁺交联的GO /藻酸盐水凝胶纤维的两端后，在干燥过程中利用多步加捻来构造分层排列的螺旋结构。详细分析了具有分层螺旋结构的一，二和三链水凝胶纤维的微观结构和拉伸力学性能。结果表明，高强度（〜2 MPa）和高韧性（> 5 MJ / m ^{3）相结合}），在藻酸盐基水凝胶纤维中可以实现大应变（> 700％）。研究了螺旋水凝胶纤维的断裂表面，以揭示其机械性能的改善。循环拉伸试验表明，螺旋形GO /藻酸盐水凝胶纤维的加载-卸载曲线中存在一个磁滞回线，静置一段时间后会出现良好的自恢复特性。还详细研究了螺旋GO /藻酸盐纤维响应水吸附的驱动性能。结果表明，螺旋结构可以调节驱动性能，螺旋纤维可以用作软致动器。

更新日期：2020-06-26

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南