Toward Stimuli-Responsive Soft Robots with 3D Printed Self-Healing Konjac Glucomannan Gels.
Toward Stimuli-Responsive Soft Robots with 3D Printed Self-Healing Konjac Glucomannan Gels.
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DOI：
10.1089/3dp.2020.0289
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发表时间：
2021-07
影响因子：
3.1
通讯作者：
Krishna Manaswi Digumarti;Daniel Gosden;Nguyen Hao Le;J. Rossiter
中科院分区：
文献类型：
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作者：
Krishna Manaswi Digumarti;Daniel Gosden;Nguyen Hao Le;J. Rossiter
制造新型多功能软材料的重大进展和增材制造技术的进步催生了新一代具有复杂能力的软机器人，如爬行，游泳，跳跃，抓取和释放。在这种大量的响应性软材料中，水凝胶由于其迷人的特性而受到相当大的关注，包括可生物降解，自我修复，刺激响应和大体积转化。魔芋葡甘聚糖（Konjac Glucomannan，KGM）是一种可食用的多糖，与水凝胶交联后可形成pH响应性的自修复水凝胶，是本研究的重点。提出了一种用于在室温下三维（3D）打印自由形状结构和软机器人的新型KGM-硼砂油墨。演示了从油墨制备到制造完全交联部件的完整过程。表征了印刷设置参数、墨水和交联凝胶的流变性能。打印质量被认为是一致的，在广泛的打印设置。实现的最小线宽为650 μm。进行拉伸试验以验证KGM-硼砂凝胶的自愈合能力。结果表明，KGM-硼砂具有98%的高自愈效率。水下自我修复也被证明，交联凝胶的罕见。通过3D打印形成复杂结构的方法，对环境刺激的反应和对损坏的恢复力，使这种新的KGM-硼砂凝胶成为制造下一代软机器人的有希望的候选者。
Significant progress in fabricating new multifunctional soft materials and the advances of additive manufacturing technologies have given birth to a new generation of soft robots with complex capabilities, such as crawling, swimming, jumping, gripping, and releasing. Within this vast array of responsive soft materials, hydrogels receive considerable attention due to their fascinating properties, including biodegradable, self-healing, stimuli-responsive, and large volume transformation. Konjac glucomannan (KGM) is an edible polysaccharide that forms a pH-responsive, self-healing hydrogel when crosslinked with borax, and it is the focus of this study. A novel KGM-Borax ink for three-dimensional (3D) printing of free-form structures and soft robots at room temperature is presented. A complete process from ink preparation to the fabrication of a completely cross-linked part is demonstrated. Print setting parameters, rheological properties of the ink and crosslinked gels were characterized. Print quality was found to be consistent across a wide range of print settings. The minimum line width achieved is 650 μm. Tensile testing was carried out to validate the self-healing capability of the KGM-Borax gel. Results show that KGM-Borax has a high self-healing efficiency of 98%. Self-healing underwater was also demonstrated, a rarity for crosslinked gels. The means to form complex structures via 3D printing, reacting to environmental stimuli and the resilience against damage, make this new KGM-Borax gel a promising candidate for the fabrication of the next generation of soft robots.