Self‐healing Polyol/Borax Hydrogels: Fabrications, Properties and Applications

Seidi, Farzad; Jin, Yongcan; Han, Jingquan; Saeb, Mohammad Reza; Akbari, Ali; Hosseini, Seyed Hasan; Shabanian, Meisam; Xiao, Huining

doi:10.1002/tcr.202000060

Cited by 38 publications

(28 citation statements)

References 123 publications

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“…Subsequent healing of the mechanical damage in the same position is, however, limited. On the other hand, the intrinsic approach relies on dynamic reversible bonds via either physical or chemical bonds, and, therefore, it is the most applicable approach for many applications [ 119 , 139 , 140 ].…”

Section: Preparation Of Electric Conductive Hydrogels Based On Natural Polymersmentioning

confidence: 99%

“…Figure 17 shows the simple mechanism of borax dissociation in water into boric acid and borate ions that can chemically cross-link the hydroxyl-containing polymers, such as carbohydrates and polyols, through boron ester bonds. An alkaline medium is preferable for this reaction to provide densely cross-linking hydrogels as more borate ions (B(OH) 4 − ) are available over the boric acid (B(OH) 3 ) [ 140 ].…”

Section: Preparation Of Electric Conductive Hydrogels Based On Natural Polymersmentioning

confidence: 99%

See 1 more Smart Citation

Irreversible and Self-Healing Electrically Conductive Hydrogels Made of Bio-Based Polymers

Nada

Andicsová

Mosnáček

2022

IJMS

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Electrically conductive materials that are fabricated based on natural polymers have seen significant interest in numerous applications, especially when advanced properties such as self-healing are introduced. In this article review, the hydrogels that are based on natural polymers containing electrically conductive medium were covered, while both irreversible and reversible cross-links are presented. Among the conductive media, a special focus was put on conductive polymers, such as polyaniline, polypyrrole, polyacetylene, and polythiophenes, which can be potentially synthesized from renewable resources. Preparation methods of the conductive irreversible hydrogels that are based on these conductive polymers were reported observing their electrical conductivity values by Siemens per centimeter (S/cm). Additionally, the self-healing systems that were already applied or applicable in electrically conductive hydrogels that are based on natural polymers were presented and classified based on non-covalent or covalent cross-links. The real-time healing, mechanical stability, and electrically conductive values were highlighted.

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Section: Preparation Of Electric Conductive Hydrogels Based On Natural Polymersmentioning

confidence: 99%

Section: Preparation Of Electric Conductive Hydrogels Based On Natural Polymersmentioning

confidence: 99%

Irreversible and Self-Healing Electrically Conductive Hydrogels Made of Bio-Based Polymers

Nada

Andicsová

Mosnáček

2022

IJMS

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“…Several thermoplastic polymers have been used to synthesize nanofibers by the electro-spinning method such as polyacrylamide (PAM), polyvinyl alcohol (PVA), polyvinyledene fluoride (PVDF), etc. 14 , 15 . PVDF is a well-known polymer mostly used to produce nanofibers owing to its excellent mechanical, thermal, and electrical properties 16 .…”

Section: Introductionmentioning

confidence: 99%

“…A coaxial electrospinning instrument (Model: NS1 NanoSpinner Electrospinning equipment, INOVENSO, Korea) was used to produce core-shell nanofibers with uni-diameters. The mechanical properties were studied for various weight percentages of thermoplastic cornstarch (TPS) (5,10,15, and 20 wt%). As expected, the crystallinity and the modulus of the fibers increased with the increase in the TPS weight percentage in PVDF, which, in turn, increased their diameter, as confirmed by X-ray diffraction (XRD), tensile tests, and field emission scanning electron microscopy (FESEM).…”

mentioning

confidence: 99%

Synthesis of vinyl ester resin-carrying PVDF green nanofibers for self-healing applications

Kumar

Prabhakar

Song

2021

Sci Rep

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Self-healing on the engineering applications is smart, decisive research for prolonging the life span of the materials and the innovations have been mounting still smarter. Connecting to advancements in self-healing carriers, in altering the chemical structure by optimizing the brittleness for self-healing performance and introducing the bio-degradability, for the first time TPS was blended to PVDF for the synthesis of nanofibers, as carriers of a vinyl ester (VE) resin (medication), by the coaxial electrospinning technique. TPS was mechanically mixed with PVDF base polymer and optimized the TPS content (10 wt%) based on mechanical performance. The novel nanofibers were characterized via field emission scanning electron microscopy (FESEM), Fourier-transform infrared spectroscopy, X-ray diffraction, thermal, moisture analysis, and a mechanical line with FESEM and energy-dispersive X-ray analysis studied the self-healing. The TPS/PVDF fibers having hydrogen bonding and increased the crystallinity (40.57 → 44.12%) and the diameter (115 → 184 nm) along with the surface roughness of the fibers with increasing the TPS content. Microanalysis presented the flow-out of the VE resin at the scratched parts in the pierced fibers; interestingly, after some time, the etched part was cured automatically by the curing of the spread resin. Mechanical stretching of the nanofibers in the tensile tests up in the plastic region showed a decrement in the elasticity (TPS/PVDF fibers) and an increment in the brittle nature (cured VE resin) with the increase in Young’s modulus at each stretching, clearly elucidating the healing performance.

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“…Among the self‐healing hydrogels, the PVA/borax hydrogel crosslinked through dynamic borate bonds showing the desirable self‐healing ability attracted much attention. [ 11,12 ] However, the highly dynamic network of the PVA/borax hydrogel resulted in the poor mechanical property which cannot work as the load‐bearing materials in many fields largely limited the applications. [ 13,14 ] On the other hand, the excellent mechanical property and extraordinary self‐healing property are opposed.…”

Section: Introductionmentioning

confidence: 99%

Boron Nitride Nanosheets Strengthened PVA/Borax Hydrogels with Highly Efficient Self‐Healing and Rapid pH‐Driven Shape Memory Effect

Xue

Liu

Lai

et al. 2021

Macro Materials & Eng

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Self‐healing hydrogels often possess poor mechanical properties which largely limits their applications in many fields. In this work, boron nitride nanosheets are introduced into a network of the poly(vinyl alcohol)/borax (PVA/borax) hydrogels to enhance the mechanical properties of the hydrogel without compromising the self‐healing abilities. The obtained hydrogels exhibit excellent mechanical properties with a tensile strength of 0.410 ± 0.007 MPa, an elongation at break of 1712%, a Young's Modulus of 0.860 ± 0.023 MPa, and a toughness of 3.860 ± 0.075 MJ m−3. In addition, the self‐healing efficiency of the hydrogels is higher than 90% within 10 min at room temperature. Benefiting from the excellent self‐healing properties, the shapeability of the hydrogel fragments is observed using different molds. In addition, the hydrogels display rapid pH‐driven shape memory effects and can recover to their original shape within 260 s. Overall, this work provides a new approach to hydrogels with integrated excellent mechanical properties, self‐healing abilities, and rapid pH‐driven shape memory effects.

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Self‐healing Polyol/Borax Hydrogels: Fabrications, Properties and Applications

Cited by 38 publications

References 123 publications

Irreversible and Self-Healing Electrically Conductive Hydrogels Made of Bio-Based Polymers

Irreversible and Self-Healing Electrically Conductive Hydrogels Made of Bio-Based Polymers

Synthesis of vinyl ester resin-carrying PVDF green nanofibers for self-healing applications

Boron Nitride Nanosheets Strengthened PVA/Borax Hydrogels with Highly Efficient Self‐Healing and Rapid pH‐Driven Shape Memory Effect

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