Preparation of chitin nanofiber-reinforced carboxymethyl cellulose films

Hatanaka, Daisuke; Yamamoto, Katsuhiro; Kadokawa, Jun‐ichi

doi:10.1016/j.ijbiomac.2014.05.022

Cited by 42 publications

(19 citation statements)

References 15 publications

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“…The peaks at around 1160 and 1023 cm −1 are attributed to asymmetric stretching vibration of COC glycoside and CO stretching in the COH stretching, respectively, [30][31][32][33][34] while the peak at 895 cm −1 is related to COC bridge. The peaks at around 1160 and 1023 cm −1 are attributed to asymmetric stretching vibration of COC glycoside and CO stretching in the COH stretching, respectively, [30][31][32][33][34] while the peak at 895 cm −1 is related to COC bridge.…”

Section: Resultsmentioning

confidence: 99%

Super‐Stretchable Zinc–Air Batteries Based on an Alkaline‐Tolerant Dual‐Network Hydrogel Electrolyte

Chen

Wang

et al. 2019

Advanced Energy Materials

345

296

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remains a challenge. Meanwhile, zincair battery provides a theoretical energy density up to 1086 Wh•kg −1 , even much higher than commercial lithium-ion batteries, promising to next-generation longlasting power system. [1][2][3][4][5] In addition, the process of assembling zinc-air battery does not require water-free and/or oxygenfree environment, which is in favor of scaling up at low cost. [6][7][8][9][10] Therefore, developing stretchable zinc-air batteries with stretchability and weavability will be highly attractive as a power unit for various flexible/wearable devices.The difficulty to develop super-stretchable zinc-air battery is that it must use strong alkaline electrolyte (always 6 m KOH) to achieve decent power density considering all zinc-air batteries with neutral electrolyte possess unacceptable low power output. [11,12] On the other hand, most super-stretchable hydrogels that are considered as an essential component of a stretchable energy storage device will lose their stretchability under such strong alkaline environment. Currently, a zincair battery is typically assembled using polyvinyl alcohol (PVA)-based electrolyte. [2,[13][14][15][16][17] However, the PVA-based electrolyte possesses very poor stretchability (even worse when alkaline electrolyte infiltrated), and meanwhile it shows limited ion-transport capability, resulting in poorly electrochemical performance and mechanical flexibility. [18][19][20][21] Although other hydrogels, such as polyacrylic acid (PAA), polyacrylamide (PAM), show strong water-retention capability and high stretchability, [22,23] unfortunately, they will lose their mechanical robustness, especially the stretchability, when they are incorporated with strong alkaline electrolyte. [24][25][26] Therefore, the absence of alkaline-tolerant hydrogel electrolyte with high stretchability and excellent ion transport capability is the key challenge to fabricate super-stretchable zinc-air battery and enhance its weavability. An alternative way to fabricate stretchable zinc-air battery (very limited stretchability with a maximum strain less than 10%) has been proposed, that is to use electron/ion-inactive stretchable substrate (e.g., rubber elastomer) or strain-accommodating engineering of device structure (e.g., fiber-shaped planar structure). [27][28][29] The problem is that the stretchable components are additional, and they are not involved in any chemical reactions. In some cases, Stretchable devices need elastic hydrogel electrolyte as an essential component, while most hydrogels will lose their stretchability after being incorporated with strong alkaline solution. This is why highly stretchable zinc-air batteries have never been reported so far. Herein, super-stretchable, flat-(800% stretchable) and fiber-shaped (500% stretchable) zinc-air batteries are first developed by designing an alkaline-tolerant dual-network hydrogel electrolyte. In the dualnetwork hydrogel electrolyte, sodium polyacrylate (PANa) chains contribute to the formation of soft domains and the carboxyl gr...

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Section: Resultsmentioning

confidence: 99%

Super‐Stretchable Zinc–Air Batteries Based on an Alkaline‐Tolerant Dual‐Network Hydrogel Electrolyte

Chen

Wang

et al. 2019

Advanced Energy Materials

345

296

View full text Add to dashboard Cite

show abstract

“…As can be seen, the absorption band at 1592 cm −1 is assigned to asymmetrical COO– stretching of CMC [28]. The signals at 1414 and 1320 cm −1 are related to the symmetrical stretching vibrations of the carboxylate groups and C–H bending, respectively [29].…”

Section: Resultsmentioning

confidence: 99%

Preparation and Characterization of Blended Films from Quaternized Hemicelluloses and Carboxymethyl Cellulose

Liu

Chu

et al. 2015

Materials

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Utilization of hemicelluloses from biomass energy is an important approach to explore renewable resources. A convenient, quick, and inexpensive method for the preparation of blended films from quaternized hemicelluloses (QH) and carboxymethyl cellulose (CMC) was introduced into this study. QH and CMC solution were first mixed to form homogeneous suspension, and then were dried under vacuum to fabricate the blended films. The FT-IR and XRD results indicated that the linkage between QH and CMC was due to the hydrogen bonding and electrostatic interaction. From the results of mechanical properties and water vapor permeability (WVP), the tensile strength of the blended films increased with the QH/CMC content ratio increasing in appropriate range, and the WVP of the blended films decreased. The maximum value of tensile strength of blend film achieved was 27.4 MPa. In addition, the transmittances of the blended films increased with the decreasing of QH/CMC content ratio. When the weight ratio (QH: CMC) was 1:1.5, the blend film showed the best light transmittance (45%). All the results suggested that the blended films could be used in areas of application in the coating and packaging fields from the good tensile strength, transmittance, and low WVP.

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“…86 A 10% w/w chitin ion gel with AMIMBr was prepared and a solution of PVA (DP ¼ ca. 89 CMC is one of the most widely applied cellulose derivatives in the detergent, food, paper and textile industries and can be easily processed, e.g. Because methanol is a poor solvent for PVA, the two polymers were co-regenerated by soaking the mixture in methanol, followed by ltration and Soxhlet extraction with methanol to produce a self-assembled chitin nanober/PVA composite lm.…”

Section: Preparation Of Composite Materials From Self-assembled Chitimentioning

confidence: 99%

Fabrication of nanostructured and microstructured chitin materials through gelation with suitable dispersion media

Kadokawa

2015

RSC Adv.

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Recent developments in the fabrication of nano-and microstructured chitin materials are reviewed, specifically focusing on approaches through gelation with suitable dispersion media. Although chitin is one of the most abundant natural polysaccharides, it is under-used as a result of its poor solubility and difficulties in processing.The dissolution of chitin in different solvent systems, including ionic liquids, has been investigated for the production of various materials. For example, the ionic liquid 1-allyl-3-methylimidazolium bromide dissolved chitin at concentrations up to 5% w/w and formed ion gels at higher concentrations of chitin. A highly concentrated solution of CaBr 2 $2H 2 O/methanol also induced the gelation of chitin. As one of the most efficient methods of production of nanomaterials from chitin, self-assembled nanofibers have been fabricated by regeneration from solutions or gels of chitin with the appropriate solvents and dispersion media using a bottom-up approach. For example, a chitin ion gel with 1-allyl-3-methylimidazolium bromide was regenerated using methanol to produce a chitin nanofiber dispersion, which was then used to construct a film with a highly entangled nanofiber morphology by filtration. Physical and chemical approaches have been investigated for the fabrication of composite materials of self-assembled chitin nanofibers with other polymeric components.Poly(vinyl alcohol) and carboxymethyl cellulose were made compatible with chitin nanofibers by coregeneration and electrostatic interaction procedures, respectively. Surface-initiated graft polymerization of some monomers from chitin nanofiber films with the appropriate initiating groups have been conducted using the latter approach to obtain composite films covalently linked to graft chains on the nanofibers. Regeneration from gels with CaBr 2 $2H 2 O/methanol resulted in the efficient production of microporous materials.

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Preparation of chitin nanofiber-reinforced carboxymethyl cellulose films

Cited by 42 publications

References 15 publications

Super‐Stretchable Zinc–Air Batteries Based on an Alkaline‐Tolerant Dual‐Network Hydrogel Electrolyte

Super‐Stretchable Zinc–Air Batteries Based on an Alkaline‐Tolerant Dual‐Network Hydrogel Electrolyte

Preparation and Characterization of Blended Films from Quaternized Hemicelluloses and Carboxymethyl Cellulose

Fabrication of nanostructured and microstructured chitin materials through gelation with suitable dispersion media

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