Preparation of konjac glucomannan–borax hydrogels with good self-healing property and pH-responsive behavior

Song, Cunzhen; Lv, Yukai; Qian, Kaiyao; Chen, Yulong; Qian, Xin

doi:10.1007/s10965-019-1702-z

Cited by 23 publications

(12 citation statements)

References 35 publications

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“…The borate-diol linkages contribute to the increase of the self-healing and viscoelastic properties. Furthermore, BA-mediated crosslinking reactions can be conducted at room temperature [20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Crosslinkers for polysaccharides and proteins: Synthesis conditions, mechanisms, and crosslinking efficiency, a review

Alavarse

Frachini

Silva

et al. 2022

International Journal of Biological Macromolecules

145

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Section: Introductionmentioning

confidence: 99%

Crosslinkers for polysaccharides and proteins: Synthesis conditions, mechanisms, and crosslinking efficiency, a review

Alavarse

Frachini

Silva

et al. 2022

International Journal of Biological Macromolecules

145

View full text Add to dashboard Cite

“…An increase in pH has the opposite effect, stabilizing the tetrahedral structure of the borate ions and strengthening the gel. Song et al 21 consider the rheological properties of a similar KGM-Borax gel at both pH 2 and pH 10. They demonstrate an increase in shear storage modulus within the LVE region on the order of 15 • when transitioning from acidic to alkali conditions.…”

Section: Discussionmentioning

confidence: 99%

“…First, the equilibrium represented in Equation ( 1) can be altered by the addition of an acid or an alkali. 21 Consequently, the crosslinked KGM-Borax gel is responsive to changes in pH, with alkaline conditions producing a mechanically stronger gel.…”

Section: Introductionmentioning

confidence: 99%

“…Second, in the presence of free borate ions, the KGM-Borax gel also exhibits self-healing, while remaining stiff enough to maintain its form. 21 Several approaches have been proposed to realize polymers that repair themselves, among which the popular ones are dynamic covalent bonds 22,23 and reversible chemical reactions. 24,25 The latter has been employed in the context of soft robotics.…”

Section: Introductionmentioning

confidence: 99%

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Toward Stimuli-Responsive Soft Robots with 3D Printed Self-Healing Konjac Glucomannan Gels

Digumarti

Gosden

et al. 2022

3D Printing and Additive Manufacturing

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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 pHresponsive, 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 lm. 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.

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“…Self-healing is a property that is used by natural organisms to prolong their lives and to safely reach maturity. Examples include self-healing in Diels-Alder materials [23], and-more excitingly-self-healing in biodegradable polymers including konjac glucomannan gels [24]. While these employ molecular-level self-healing, a structural approach can also be taken, for example by employing capsule-based and vascular healing systems [25].…”

Section: Sustainabilitymentioning

confidence: 99%

Soft robotics: the route to true robotic organisms

Rossiter

2021

Artif Life Robotics

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Soft Robotics has come to the fore in the last decade as a new way of conceptualising, designing and fabricating robots. Soft materials empower robots with locomotion, manipulation, and adaptability capabilities beyond those possible with conventional rigid robots. Soft robots can also be made from biological, biocompatible and biodegradable materials. This offers the tantalising possibility of bridging the gap between robots and organisms. Here, we discuss the properties of soft materials and soft systems that make them so attractive for future robots. In doing so, we consider how future robots can behave like, and have abilities akin to, biological organisms. These include huge numbers, finite lifetime, homeostasis and minimal—and even positive—environmental impact. This paves the way for future robots, not as machines, but as robotic organisms.

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Preparation of konjac glucomannan–borax hydrogels with good self-healing property and pH-responsive behavior

Cited by 23 publications

References 35 publications

Crosslinkers for polysaccharides and proteins: Synthesis conditions, mechanisms, and crosslinking efficiency, a review

Crosslinkers for polysaccharides and proteins: Synthesis conditions, mechanisms, and crosslinking efficiency, a review

Toward Stimuli-Responsive Soft Robots with 3D Printed Self-Healing Konjac Glucomannan Gels

Soft robotics: the route to true robotic organisms

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