Comparative study on temperature/pH sensitive xylan-based hydrogels: their properties and drug controlled release

Gao, Cundian; Ren, Junli; Kong, Weiqing; Sun, Run‐Cang; Chen, Qifeng

doi:10.1039/c5ra16703e

Cited by 41 publications

(28 citation statements)

References 60 publications

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“…The slower degradation rate and higher stability of B5AMA-5 and B5AMA-20 reect their densely cross-linked structures, in comparison to B5AMA-10 hydrogel. 23,24 To further explore the water release efficacies of B5AMA-10, TGA analysis was performed before and aer the release of water. The water laden B5AMA-10 hydrogels, when heated to 53 C, exhibit rapid weight loss (>90%), indicating that more than 90% of the weight of hydrogel was in the form of water and the cross-linked polymeric chains of pantothenic acid comprised less than 10% of weight of the sample, which were degraded at higher temperatures (between 400-600 C) (Fig.…”

Section: Tablementioning

confidence: 99%

Water recycling efficacies of extremely hygroscopic, antifouling hydrogels

et al. 2018

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Section: Tablementioning

confidence: 99%

Water recycling efficacies of extremely hygroscopic, antifouling hydrogels

et al. 2018

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“…For TiO2-KH550, the characteristic peaks of rutile TiO2 were observed, indicating that the crystal form of the nano-particles has not changed obviously after modification. For KT1-KT2.5, the characteristic diffraction peaks of xylan at 2θ=18.8°[45] and of PVA at 2θ=19.4°[46] combined into a broad diffraction peak at 2θ=19.6°after forming the composite film, indicating that the crystalline area of xylan was changed during the formation of film. New diffraction peaks occurred at 27.6 °, 36.1 °, 41.2 ° and 54.4 °, which are the main characteristic peaks of rutile TiO2 particles.…”

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confidence: 99%

TiO<sub>2</sub>-KH550 Nanoparticle Reinforced PVA/Xylan Composite Films with Multifunctional Properties

Liu¹,

Chen²,

Ren³

et al. 2018

Preprint

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In order to improve the strength of PVA/xylan composite films and endow them with ultraviolet (UV) shielding ability, TiO2-KH550 nanoparticle was synthesized and added into the PVA/xylan matrix. The TiO2-KH550 nanoparticle dispersed well in the 0.04% sodium hexametaphosphate (SHMP) solution under ultrasonic and stirring treatments. Investigations on the properties of films showed that TiO2-KH550 had the positive impact on improving the strength, moisture and oxygen barrier properties of the composite films. The maximum tensile strength (27.3 MPa), the minimum water vapor permeability (2.75×10-11 g•m-1•s-1•Pa-1) and oxygen permeability (4.013 cm3•m-2•24h-1•0.1MPa-1) were obtained under the addition of 1.5% TiO2-KH550. The tensile strength of TiO2-KH550 reinforced composite film was increased by 70% than that of the pure PVA/xylan composite film, and the water vapor and oxygen permeability were decreased by 31% and 41%, respectively. Moreover, the UV transmittance of film at the wavelength of 400 nm was almost zero when adding 1.5~2.5% of TiO2-KH550, which indicated the PVA/xylan composite films were endowed with excellent UV light shielding ability.

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“…1 They offer a broad range of applications including drug delivery, pharmaceutical, wound healing, and tissue engineering for diffusion and transport control of essential (organic, inorganic, and cell) materials. These hydrogels are essential and vital environmental conditions in their biomedical applications for disease control.…”

Section: Introductionmentioning

confidence: 99%

“…These hydrogels are essential and vital environmental conditions in their biomedical applications for disease control. 1 They offer a broad range of applications including drug delivery, pharmaceutical, wound healing, and tissue engineering for diffusion and transport control of essential (organic, inorganic, and cell) materials. 2,3 Especially, temperature-sensitive hydrogels have gained considerable attention in the fields of biomedicine and biochemistry due to their volume phase transition with external stimuli.…”

Section: Introductionmentioning

confidence: 99%

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Preparation of antibacterial temperature‐sensitive silver‐nanocomposite hydrogels from N‐isopropylacrylamide with green tea

Jayaramudu

Varaprasad²,

Sadiku

et al. 2017

J of Applied Polymer Sci

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This article reports the temperature-sensitive, green tea (GT)-based silver-nanocomposite hydrogels for bacterial growth inactivation. The temperature-sensitive hydrogels were prepared via free-radical polymerization using temperature-sensitive N-isopropylacrylamide (NIPAM) monomer with GT as the hydrogel matrix. The nanocomposite hydrogels were encapsulated with silver ions via swelling method, which was later reduced to silver nanoparticles using Azadirachta indica leaf extract. The temperature-sensitive silver nanocomposite hydrogels were analyzed by using Fourier transforms infrared, UV-visible spectroscopy, differential scanning calorimetry-thermogravimetric analysis, X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. The prepared hydrogels exhibited higher phase volume transition temperature than the NIPAM. The inhibition zone study of the inactivation of bacteria on the developed hydrogels was carried out against Gram negative (Escherichia coli) and Gram positive (Staphylococcus aureus), which revealed that the prepared hydrogels are helpful for the inactivation of these bacteria due to the high stabilization of antibacterial properties of the silver nanoparticles. The developed hydrogels are promising for biomedical applications.

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Comparative study on temperature/pH sensitive xylan-based hydrogels: their properties and drug controlled release

Abstract: Temperature/pH dual-responsive hydrogels as a new intestinal-targeted carriers were prepared by the grafting copolymerization of xylan possessing different functional groups with AM and NIPAm via ultraviolet irradiation.

Cited by 41 publications

References 60 publications

Water recycling efficacies of extremely hygroscopic, antifouling hydrogels

Water recycling efficacies of extremely hygroscopic, antifouling hydrogels

TiO<sub>2</sub>-KH550 Nanoparticle Reinforced PVA/Xylan Composite Films with Multifunctional Properties

Preparation of antibacterial temperature‐sensitive silver‐nanocomposite hydrogels from N‐isopropylacrylamide with green tea

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