Ultrasound stimulated release of gallic acid from chitin hydrogel matrix

Jiang, Huixin; Kobayashi, Takaomi

doi:10.1016/j.msec.2017.02.082

Cited by 48 publications

(28 citation statements)

References 40 publications

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“…Defatted cotton was a product of Kawamoto Sangyo Co., Ltd., Osaka, Japan, and was used as the cellulose source without further chemical treatment. According to our previous study, chitin was extracted from crab shells obtained from the Teradomari fish market, Nagaoka, Niigata, and purified according to our previous study [ 12 ]. For the demineralization of crab shells, hydrochloric acid (HCl) was used.…”

Section: Methodsmentioning

confidence: 99%

“…Moreover, the biocompatibility [ 7 ] and cytocompatibility [ 8 ] of such polysaccharide hydrogels are advantageous as tissue engineering scaffolds [ 8 ] and drug carriers [ 9 , 10 ]. More recently, cellulose [ 11 ] and chitin [ 12 ] hydrogel drug carriers were used as regenerative medicine hydrogels, which exhibited controllable drug release under US stimulation. Here, mimosa release from a cellulose hydrogel and gallic acid release from a chitin hydrogel were triggered by the US-promoted breakage of hydrogen bonds between the drug and the polysaccharide matrix.…”

Section: Introductionmentioning

confidence: 99%

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In Situ Viscoelasticity Behavior of Cellulose–Chitin Composite Hydrogels during Ultrasound Irradiation

Iresha

Kobayashi

2021

Gels

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Composite hydrogels with different cellulose and chitin loading were prepared, and their in-situ viscoelastic properties were estimated under cyclic exposure of 43 kHz and 30 W ultrasound (US) using a sono-deviced rheometer. US transmitted into the hydrogel caused it to soften within about 10 sec, thus causing a decline in the storage modulus (G′) and loss modulus (G″). However, when the US was stopped, the G′ and G″ returned to their initial values. Here, G′ dropped gradually in response to the US irradiation, especially in the first cycle. After the second and third cycles, the decline was much quicker, within a few seconds. When the chitin component in the hydrogel was increased, the drop was significant. FTIR analysis of the hydrogels suggested that the peaks of -OH stretching and amide I vibration near 1655 cm−1 shifted towards lower wave numbers after the third cycle, meaning that the US influenced the hydrogen bonding interaction of the chitin amide group. This repetitive effect contributed to the breakage of hydrogen bonds and increased the interactions of the acetylamine group in chitin and in the -OH groups. Eventually, the matrix turned into a more stabilized hydrogel.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

In Situ Viscoelasticity Behavior of Cellulose–Chitin Composite Hydrogels during Ultrasound Irradiation

Iresha

Kobayashi

2021

Gels

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“…The chemical structure of chitin is composed of β-(1 → 4)-N-acetyl-D-glucosamine units and is known for its several advantages, such as biocompatibility, biodegradability, and low toxicity, as shown in Figure 1a. Reported studies have already shown that biopolymer such as chitin is a potential material in the drug delivery system for medicine [14] and adsorbent for the removal of heavy metal ions in wastewater [15]. In addition, research on the preparation of chitin fiber through the wet-spinning process has not been reported elsewhere regarding the effect of the temperature of the water coagulation bath.…”

Section: Introductionmentioning

confidence: 99%

Temperature Effect of Water Coagulation Bath on Chitin Fiber Prepared through Wet-Spinning Process

Nguyen

2021

Polymers

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Chitin was chemically extracted from crab shell waste and dissolved in N,N-dimethyl acetamine/5% lithium chloride (DMAc/5% LiCl) at room temperature to obtain 1% and 2% concentrations of chitin solution. Chitin fibers were prepared by phase inversion at different temperatures of water coagulation bath at 5, 20, and 60 °C. The deconvolution of FTIR spectra indicated that the area portion of the intermolecular hydrogen bonding NH…OC increased at 60 °C due to the higher density of the chitin segment in the fiber. As a result, scanning electron microscope (SEM) measurement suggests that a denser structure of the chitin fiber was observed when the temperature of the coagulation bath increased. In addition, the resultant chitin fibers generated better mechanical properties relative to the amount of chitin concentration and temperature. At 2% of chitin solution, the tensile strength significantly increased from 80 to 182 MPa for the fiber obtained at temperatures of 5 and 60 °C of the water coagulation bath, respectively. Meanwhile, the water content in the fiber significantly decreased from 1101% to 335%. This green synthesis route has high potential for the fabrication of the fiber as future material of interest for biomedical application.

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“…We have developed CT hydrogel for purposes of regenerative medicine . Therefore, in the present study, the CT hydrogel was applied for biosorption, when combined clay materials.…”

Section: Introductionmentioning

confidence: 99%

Chitin‐halloysite nanoclay hydrogel composite adsorbent to aqueous heavy metal ions

Nguyen

Trang

Kobayashi

2018

J of Applied Polymer Sci

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Halloysite nanoclay (HNC) was mixed with Chitin hydrogel film by phase inversion in water vapor atmosphere at room temperature. In the preparation, Chitin was dissolved in N,N‐dimethyl acetamine/lithium chloride (DMAc/LiCl) and different amounts of HCN was dispersed well for the gelation process. The resultant Chitin‐Halloysite nanoclay (CTH) hydrogel films containing HCN at 0, 0.1, 0.5, 1, and 4 wt % were used for the adsorbents of heavy metal ions. As the results, the tensile strength of the hydrogel composite was enhanced from 0.34 to 0.71 N/mm2 while the elongation decreased from 66.43% to 49.93% with the increment of HNC concentration from 0 to 4 wt %. A reduction in the water content and the increment in the modulus confirmed the formation of highly dispersed nano‐composites with improved interfacial interactions between nano‐fillers and matrix. In the adsorption experiments of the ternary ion of Pb2+, Cu2+, and Cd2+, the removal capacity of Pb(II) was highly retained by the CTH hydrogel film relative to Cd(II) and Cu(II), shown Langmuir model with the maximum binding amount on the hydrogel composites were followed as order Pb (8.2 mg/g), Cu (4.2 mg/g), and Cd (2.1 mg/g). © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47207.

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Ultrasound stimulated release of gallic acid from chitin hydrogel matrix

Cited by 48 publications

References 40 publications

In Situ Viscoelasticity Behavior of Cellulose–Chitin Composite Hydrogels during Ultrasound Irradiation

In Situ Viscoelasticity Behavior of Cellulose–Chitin Composite Hydrogels during Ultrasound Irradiation

Temperature Effect of Water Coagulation Bath on Chitin Fiber Prepared through Wet-Spinning Process

Chitin‐halloysite nanoclay hydrogel composite adsorbent to aqueous heavy metal ions

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