A facile preparation method for anti-freezing, tough, transparent, conductive and thermoplastic poly(vinyl alcohol)/sodium alginate/glycerol organohydrogel electrolyte

Hu, Oudong; Chen, Guoqi; Gu, Jianfeng; Lü, Jing; Zhang, Jin; Zhang, Xi; Hou, Linxi; Jiang, Xiancai

doi:10.1016/j.ijbiomac.2020.08.115

Cited by 42 publications

(22 citation statements)

References 29 publications

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“…When chemical crosslinking was used, the hydrogels were characterized by a denser structure than in the case of the ionic methods. Then, the samples exhibited significant porosity, which was confirmed in our previous research and in other literature data [ 35 , 45 , 53 ].…”

Section: Resultssupporting

confidence: 89%

“…Moreover, it could be seen that the sample containing 1.7% ( v/v ) of glycerin (S2G0.5) still retained high transparency, while the transparency of S2G0 without glycerin drastically decreased. The same observation was previously reported by Hu et al, who prepared a poly(vinyl alcohol)/sodium alginate/glycerol organohydrogel electrolyte [ 35 ]. Additionally, due to the addition of glycerin to the system, the flexibility of the samples changed.…”

Section: Resultssupporting

confidence: 81%

“…Interestingly, glycerin present in the three-dimensional network of a polymeric matrix can absorb excess exudate and prevent its pooling in the wound or on the surrounding skin, ensuring a proper wound healing environment [ 6 ]. Hence, many researchers incorporated glycerin into hydrogels, which improved their toughness, transparency, conductivity and thermoplasticity [ 35 , 36 , 37 , 38 , 39 ]. Various possible combinations of glycerin with the crosslinked polymers, such as: methoxyl pectin/gelatin/carboxymethyl cellulose [ 40 ], chitosan/hydroxypropyl methylcellulose [ 41 ], polyacrylamide/gelatin/ε-polylysine [ 42 ], and PVA/sodium alginate [ 43 ] have been observed.…”

Section: Introductionmentioning

confidence: 99%

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The Effect of Glycerin Content in Sodium Alginate/Poly(vinyl alcohol)-Based Hydrogels for Wound Dressing Application

Bialik-Wąs

Pluta

Barczewski

et al. 2021

IJMS

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The impact of different amounts of glycerin, which was used in the system of sodium alginate/poly(vinyl alcohol) (SA/PVA) hydrogel materials on the properties, such as gel fraction, swelling ability, degradation in simulated body fluids, morphological analysis, and elongation tests were presented. The study shows a significant decrease in the gel fraction from 80.5 ± 2.1% to 45.0 ± 1.2% with the increase of glycerin content. The T5 values of the tested hydrogels were varied and range from 88.7 °C to 161.5 °C. The presence of glycerin in the matrices significantly decreased the thermal resistance, which was especially visible by T10 changes (273.9 to 163.5 °C). The degradation tests indicate that most of the tested materials do not degrade throughout the incubation period and maintain a constant ion level after 7-day incubation. The swelling abilities in distilled water and phosphate buffer solution are approximately 200–300%. However, we noticed that these values decrease with the increase in glycerin content. All tested matrices are characterized by the maximum elongation rate at break in a range of 37.6–69.5%. The FT-IR analysis exhibits glycerin changes in hydrogel structures, which is associated with the cross-linking reaction. Additionally, cytotoxicity results indicate good adhesion properties and no toxicity towards normal human dermal fibroblasts.

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Section: Resultssupporting

confidence: 89%

Section: Resultssupporting

confidence: 81%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The Effect of Glycerin Content in Sodium Alginate/Poly(vinyl alcohol)-Based Hydrogels for Wound Dressing Application

Bialik-Wąs

Pluta

Barczewski

et al. 2021

IJMS

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“…In the case of chemically crosslinked hydrogels, the network is more packed and dense, and the pores cannot be distinguished. Based on the literature, the application of some other preparation routes, such as UV radiation or the freezing/thawing process, makes the surface of a hydrogel more dense or porous [45,56,57]. In summary, a proper selection of the crosslinking method is very important from the point of view of potential applications.…”

Section: Sem Analysismentioning

confidence: 99%

Impact of the Type of Crosslinking Agents on the Properties of Modified Sodium Alginate/Poly(vinyl Alcohol) Hydrogels

Bialik-Wąs

Królicka

2021

Molecules

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Here, we report on studies on the influence of different crosslinking methods (ionic and chemical) on the physicochemical (swelling ability and degradation in simulated body fluids), structural (FT-IR spectra analysis) and morphological (SEM analysis) properties of SA/PVA hydrogels containing active substances of natural origin. First, an aqueous extract of Echinacea purpurea was prepared using a Soxhlet apparatus. Next, a series of modified SA/PVA-based hydrogels were obtained through the chemical crosslinking method using poly(ethylene glycol) diacrylate (PEGDA, Mn = 700 g/mol) as a crosslinking agent and, additionally, the ionic reaction in the presence of a 5% w/v calcium chloride solution. The compositions of SA/PVA/E. purpurea-based hydrogels contained a polymer of natural origin—sodium alginate (SA, 1.5% solution)—and a synthetic polymer—poly(vinyl alcohol) (PVA, Mn = 72,000 g/mol, 10% solution)—in the ratio 2:1, and different amounts of the aqueous extract of E. purpurea—5, 10, 15 or 20% (v/v). Additionally, the release behavior of echinacoside from the polymeric matrix was evaluated in phosphate-buffered saline (PBS) at 37 °C. The results indicate that the type of the crosslinking method has a direct impact on the release profile. Consequently, it is possible to design a system that delivers an active substance in a way that depends on the application.

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“…On the contrary, aSC-DH gel retained its flexibility after being cooled to −60°C. Compared to other works on freeze-resistant tough hydrogels shown in Figure 3 B, our material has superior mechanical performances at low temperature ( Cao et al., 2020 ; Morelle et al., 2018 ; Liu et al., 2020b ; Hu et al., 2020 ; Yang et al., 2021 ). This aSC-DH gel has over 10-time higher toughness than other works at low temperature (−45°C).…”

Section: Resultsmentioning

confidence: 68%

Tendon-inspired anti-freezing tough gels

Duan

Hua

et al. 2021

iScience

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Summary Hydrogels have gained tremendous attention due to their versatility in soft electronics, actuators, biomedical sensors, etc. Due to the high water content, hydrogels are usually soft, weak, and freeze below 0°C, which brings severe limitations to applications such as soft robotics and flexible electronics in harsh environments. Most existing anti-freezing gels suffer from poor mechanical properties and urgently need further improvements. Here, we took inspirations from tendon and coniferous trees and provided an effective method to strengthen polyvinyl alcohol (PVA) hydrogel while making it freeze resistant. The salting-out effect was utilized to create a hierarchically structured polymer network, which induced superior mechanical properties (Young's modulus: 10.1 MPa, tensile strength: 13.5 MPa, and toughness: 127.9 MJ/m 3 ). Meanwhile, the cononsolvency effect was employed to preserve the structure and suppress the freezing point to −60°C. Moreover, we have demonstrated the broad applicability of our material by fabricating PVA hydrogel-based hydraulic actuators and ionic conductors.

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A facile preparation method for anti-freezing, tough, transparent, conductive and thermoplastic poly(vinyl alcohol)/sodium alginate/glycerol organohydrogel electrolyte

Cited by 42 publications

References 29 publications

The Effect of Glycerin Content in Sodium Alginate/Poly(vinyl alcohol)-Based Hydrogels for Wound Dressing Application

The Effect of Glycerin Content in Sodium Alginate/Poly(vinyl alcohol)-Based Hydrogels for Wound Dressing Application

Impact of the Type of Crosslinking Agents on the Properties of Modified Sodium Alginate/Poly(vinyl Alcohol) Hydrogels

Tendon-inspired anti-freezing tough gels

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