Swelling behaviors of superabsorbent chitin/carboxymethylcellulose hydrogels

Tang, Hu; Chen, Han; Duan, Bo; Lu, Ang; Zhang, Lina

doi:10.1007/s10853-013-7918-0

Cited by 90 publications

(41 citation statements)

References 38 publications

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“…This indicated that the decomposition of the citric acid crosslinked TG/CMC hydrogels is slower than individual polymers. The thermal stability of water to fill pores leading to increased equilibrium swelling [45,46] .…”

Section: Resultsmentioning

confidence: 99%

Citric Acid Crosslinked Carboxymethyl Cellulose-based Composite Hydrogel Films for Drug Delivery

Mali¹,

Dhawale²,

Dias³

et al. 2018

pharmaceutical-sciences

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Mali et al.: Carboxymethyl cellulose-based hydrogel films for drug deliveryThe objective of this study was to synthesize and characterize citric acid crosslinked hydrogel films of carboxymethyl cellulose-tamarind gum for topical drug delivery. The hydrogel films were characterized by attenuated total reflectance-Fourier-transform infrared spectroscopy, solid-state 13 C-nuclear magnetic resonance spectroscopy and differential scanning calorimeter. The prepared hydrogel films were evaluated for the carboxyl content and equilibrium swelling ratio. Moxifloxacin hydrochloride was loaded into these hydrogel films and drug release was monitored in the phosphate buffer pH 7.4. Haemolysis assay was used to study biocompatibility of hydrogel films. Results of the attenuated total reflectance-Fourier-transform infrared spectroscopy, solid-state 13 C-nuclear magnetic resonance and differential scanning calorimeter confirmed the formation of citric acid-crosslinked hydrogel films. Total carboxyl content of hydrogel film was found to be increased when polymer ratio and amount of citric acid was increased. In contrast, swelling of hydrogel film was found to be decreased with increase in polymer ratio and amount of citric acid. Batch B1 showed highest drug loading with non-Fickian release mechanism. All remaining batches showed nonFickian release behavior with diffusion coefficient greater than 0.5. Results of haemolysis assay indicated that the citric acid crosslinked carboxymethyl cellulose-tamarind gum hydrogels were safe to be used in drug delivery. These results indicated that the citric acid crosslinked carboxymethyl cellulose-tamarind gum composite hydrogel film has the potential to be used in topical novel drug delivery systems.

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Section: Resultsmentioning

confidence: 99%

Citric Acid Crosslinked Carboxymethyl Cellulose-based Composite Hydrogel Films for Drug Delivery

Mali¹,

Dhawale²,

Dias³

et al. 2018

pharmaceutical-sciences

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“…The FT‐IR spectra of the CHNC, CENC, CP, and regenerated fibers are shown in Figure . CHNC exhibited characteristic peaks of chitin at 3440 cm −1 for OH stretching vibration, 3265 cm −1 for NH stretching vibration, 1652 cm −1 for amide I region, 1624 and 1553 cm −1 for amide II region . Other samples exhibited the characteristic absorptions of cellulose with peaks located at around 3445 cm −1 for OH stretching and hydrogen bonds, 2902 and 1364 cm −1 for CH stretching, 1428 cm −1 for CH skeletal vibration, 1159 and 1022 cm −1 for CO and CC stretching or COH bending, 1154 and 899 cm −1 for COC stretching .…”

Section: Resultsmentioning

confidence: 99%

Comparison of cellulose and chitin nanocrystals for reinforcing regenerated cellulose fibers

Chen

Liu²,

Yuan

et al. 2017

J of Applied Polymer Sci

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In this study, regenerated cellulose fibers reinforced by cellulose nanocrystals (CENC) and chitin nanocrystals (CHNC) were prepared by blending the nanocrystals suspensions with the cellulose solution in NaOH/urea/water solvent at room temperature. The effect of nanocrystals' addition on the properties of spinning dopes and regenerated fibers were investigated and compared. Results showed that the obtained CENC and CHNC had different dimensions, and both of them increased the viscosity and decreased the transparency of the spinning dopes. However, the dissolution state of cellulose was not changed. CHNC had a greater influence on the properties of spinning dopes, while CENC had more obvious effect on the performance of regenerated fibers. The CENC reinforced fibers showed a higher crystallinity index as compared to the CHNC reinforced fibers. The tensile strength of the regenerated fibers was evidently improved when 3 wt % CENC or 2 wt % CHNC were added, while the elongation at break of the fibers was slightly decreased with the increase of nanocrystals content. The morphology and thermal stability of the regenerated fibers was not affected by the addition of nanocrystals. This study suggested that the dimension, group and content of nanocrystals were important factors for the reinforcement of regenerated cellulose fibers. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 44880.

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“…Superabsorbent polymers (SAPs) have attracted considerable attention because of their specific benefits such as their hydrophilic properties, high water absorbency, biocompatibility, and abundant availability . These hydrogels are composed of polyelectrolyte chains that are covalently cross‐linked to form three‐dimensional polymer networks that are capable of absorbing considerable amounts of water without dissolving itself when in contact with water, saline, or physiological fluid .…”

Section: Introductionmentioning

confidence: 99%

“…Desired features of superabsorbent polymers are high water absorbency, rapid swelling, short deswelling time, and the ability to maintain the swelled state for a prolonged time period. The majority of reported synthesized superabsorbent polymers have been evaluated for the swelling capacity of the particle, swelling rate, crosslinking density, deswelling time, and the effect of the cross‐linker in certain applications such as agriculture, hygienic products, drug delivery systems, nonwoven fabrics, and additives in cement . Moreover, the superabsorbent polymer can be manufactured with various matrix (composites) to provide a number of advantages in related fields.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, the superabsorbent polymer can be manufactured with various matrix (composites) to provide a number of advantages in related fields. To provide the optimal performance of moisture‐absorbing composite films, we prepared polyurethane films impregnated with sodium polyacrylate particles for future applications such as sanitary products, medical bandages, water blocking products in the construction industry, liquid absorbers in food packaging products, and fabric products such as car seats, shoes, and sport accessories (headbands, wristbands, etc.) to maintain comfortable circumstances by controlling the moisture absorption.…”

Section: Introductionmentioning

confidence: 99%

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Preparation and swelling behavior of moisture‐absorbing polyurethane films impregnated with superabsorbent sodium polyacrylate particles

Lee

2016

J of Applied Polymer Sci

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Moisture-absorbing composite films were prepared with superabsorbent sodium polyacrylate particles and solvent-type polyurethane for applications in fabrics. To study the effect of the particle size of sodium polyacrylates on the swelling capacity and deswelling behavior of the composite films, we prepared sodium polyacrylates with different particle sizes ranging from 277 lm to 485 nm. The rate of absorption and the swelling capacity of the composite films were generally observed to increase with decreasing sodium polyacrylate particle size-except that the water absorbency of the composite film containing the very smallest, 485-nm-size, sodium polyacrylate particles was lower than that yielded by the larger particles, perhaps because these very small sodium polyacrylate particles were impregnated inside the polyurethane matrix rather than on the surface. Meanwhile, the deswelling behavior was not significantly affected by the particle size. Differences in the ionic solutions also significantly affected the swelling capacity of the composite film and altered its swelling kinetics.

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Swelling behaviors of superabsorbent chitin/carboxymethylcellulose hydrogels

Cited by 90 publications

References 38 publications

Citric Acid Crosslinked Carboxymethyl Cellulose-based Composite Hydrogel Films for Drug Delivery

Citric Acid Crosslinked Carboxymethyl Cellulose-based Composite Hydrogel Films for Drug Delivery

Comparison of cellulose and chitin nanocrystals for reinforcing regenerated cellulose fibers

Preparation and swelling behavior of moisture‐absorbing polyurethane films impregnated with superabsorbent sodium polyacrylate particles

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