Homogenous synthesis of 3-allyloxy-2-hydroxypropyl-cellulose in NaOH/urea aqueous system

Hu, Qi; Liebert, Tim; Heinze, Thomas

doi:10.1007/s10570-012-9687-3

Cited by 30 publications

(19 citation statements)

References 19 publications

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“…To identify and contrast the interactions between allyl cellulose, CHs, and acrylic acid, ATR-FTIR spectroscopy was performed (Figure 2A). The peaks at 1633 and 1570 cm −1 were attributed to C=C stretching [30,31]. The characteristic peaks at 1718 cm −1 correspond to the C=O bond of COOH [31,32].…”

Section: Fabrication and Structure Of Cellulose-based Hydrogelsmentioning

confidence: 99%

Highly Stretchable, Strain-Sensitive, and Ionic-Conductive Cellulose-Based Hydrogels for Wearable Sensors

et al. 2019

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To extend the applications of natural polymer-based hydrogels to wearable sensors, it is both important and a great challenge to improve their mechanical and electrical performance. In this work, highly stretchable, strain-sensitive, and ionic-conductive cellulose-based hydrogels (CHs) were prepared by random copolymerization of allyl cellulose and acrylic acid. The acquired hydrogels exhibit high stretchability (~142% of tensile strain) and good transparency (~86% at 550 nm). In addition, the hydrogels not only demonstrate better sensitivity in a wide linear range (0–100%) but also exhibit excellent repeatable and stable signals even after 1000 cycles. Notably, hydrogel-based wearable sensors were successfully constructed to detect human movements. Their reliability, sensitivity, and wide-range properties endow the CHs with great potential for application in various wearable sensors.

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Section: Fabrication and Structure Of Cellulose-based Hydrogelsmentioning

confidence: 99%

Highly Stretchable, Strain-Sensitive, and Ionic-Conductive Cellulose-Based Hydrogels for Wearable Sensors

et al. 2019

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“…Figure 3a, indicating that cellulose has dissolved in [Bmim]Cl-DMF-d7. [45,46] After pouring the cellulose solution into 1-butanol-d10, these peaks disappeared. Solution-state 1 H NMR generally detects only dissolved samples; it is unsuitable for precipitated samples.…”

Section: Characterizationmentioning

confidence: 99%

Preparation of cellulose particles using an ionic liquid

Suzuki

Kono

Shimomura

et al. 2014

Journal of Colloid and Interface Science

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Cellulose is a ubiquitous natural fiber used in various industrial materials and applications. We prepared micron-sized cellulose particles by the solvent releasing method (SRM) in which cellulose-[Bmim]Cl-N,N-dimethylformamide (DMF) droplets are dispersed in hexadecane (HD) containing dissolved surfactant. The dispersion is then poured into a large amount of 1-butanol. Since 1-butanol is miscible with HD, [Bmim]Cl, and DMF but not with cellulose, the cellulose particles precipitate out. FTIR and (1)H NMR analyses confirmed that this technique precipitated cellulose and completely removed [Bmim]Cl and DMF from the cellulose-[Bmim]Cl-DMF droplets. Interestingly, the obtained cellulose particles were almost the same size as the original droplets (cellulose, 7 wt%), indicating a microporous structure of the cellulose particles with a large medium content. Although the microporous structure collapsed as the medium evaporated, it was maintained by a freeze-drying technique.

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“…The NaOH/urea and LiOH/urea solvent systems are excellent homogeneous reaction media for the etherification of cellulose and many cellulose ethers, e.g. methylcellulose, cyanoethylcellulose, hydroxyethylcellulose, 3‐allyloxy‐2‐hydroxypropylcellulose and quaternized cellulose . Cellulose derivatives synthesized in homogeneous reaction media can have different properties from those of cellulose derivatives synthesized in heterogeneous media with similar chemical compositions, which can be attributed to the differences in chemical reaction activity of different hydroxyl groups and the position of substituents.…”

Section: Cellulose Derivatives As Blocks For Functional Materialsmentioning

confidence: 99%

Cellulose derivatives and graft copolymers as blocks for functional materials

Kang

Liu

Huang

2013

Polymer International

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In this review, recent progresses in the synthesis of new cellulose derivatives and graft copolymers are summarized. Cellulose derivatives synthesized in new cellulose solvents, such as ionic liquids and NaOH/urea, and the regioselective synthesis of cellulose derivatives have attracted increasing attention in recent years and could be a more active field for cellulose in the future. Cellulose graft copolymers with well‐defined architectures synthesized by controlled/living radical polymerizations such as atomic transfer radical polymerization and their stimuli‐induced assembly have been investigated extensively. Stimuli‐responsive functional materials can be fabricated using either cellulose derivatives or graft copolymers, and they can be used as biosensors and carriers for controlled delivery of drugs and genes. The fabrication of functional materials with cellulosic blocks and their applications have a bright future. © 2013 Society of Chemical Industry

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Homogenous synthesis of 3-allyloxy-2-hydroxypropyl-cellulose in NaOH/urea aqueous system

Cited by 30 publications

References 19 publications

Highly Stretchable, Strain-Sensitive, and Ionic-Conductive Cellulose-Based Hydrogels for Wearable Sensors

Highly Stretchable, Strain-Sensitive, and Ionic-Conductive Cellulose-Based Hydrogels for Wearable Sensors

Preparation of cellulose particles using an ionic liquid

Cellulose derivatives and graft copolymers as blocks for functional materials

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