Preparation and characterization of magnetic resin made from chitosan and cerium

Yu, Liangmin; Wang, Dongfeng; Li, Haiyan; Liu, Bingjie; Wang, Xingyu; Xu, Ying

doi:10.1007/s11802-010-0185-7

Cited by 5 publications

(4 citation statements)

References 20 publications

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“…This band is probably associated with the Ce-N vibrations arising from the coordination bond between cerium and the nitrogen atoms of the chitosan macromolecule. 29 This spectroscopic evidence is a strong indication of the formation of a complex between chitosan and cerium cations.…”

Section: Chitosan-based Formulationsmentioning

confidence: 85%

Self-healing protective coatings with “green” chitosan based pre-layer reservoir of corrosion inhibitor

et al. 2011

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Section: Chitosan-based Formulationsmentioning

confidence: 85%

Self-healing protective coatings with “green” chitosan based pre-layer reservoir of corrosion inhibitor

et al. 2011

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“…The skeleton density was determined according to the method of Yu et al [54]. The amount of 5.0 mL of N-heptane was placed in a 10 mL measuring cylinder and weighed to obtain W 1 .…”

Section: Determination Of Skeleton Densitymentioning

confidence: 99%

“…The porosity value was determined according to the method of Yu et al [54]. Porosity value can be calculated by the following formula:…”

Section: Determination Of Porosity Valuementioning

confidence: 99%

Isotherm, Thermodynamics, and Kinetics of Methyl Orange Adsorption onto Magnetic Resin of Chitosan Microspheres

et al. 2022

IJMS

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Severe environmental pollution problems arising from toxic dyestuffs (e.g., methyl orange) are receiving increasing attention. Therefore, dyes’ safe removal has become a research hotspot. Among the many physical–chemical removal techniques, adsorption using renewable biological resources has proved to be more advantageous over others due to its effectiveness and economy. Chitosan is a natural, renewable biopolymer obtained by deactivated chitin. Thus, the magnetic resin of chitosan microspheres (MRCM), prepared by reversed-phase suspension cross-linking polymerization, was used to remove methyl orange from a solution in a batch adsorption system. The main results are as follows: (1) The results of physical and swelling properties of MRCM indicated that MRCM was a type of black spherical, porous, water-absorbing, and weak alkali exchange resin, and it had the ability to adsorb methyl orange when it was applied in solutions above pH 2.0. (2) In batch adsorption studies, the maximum adsorption capacity was obtained at pH 5; the adsorption equilibrium time was 140 min; and the maximum adsorption was reached at 450 mg/L initial concentration. (3) Among the three isotherm adsorption models, Langmuir achieved the best fit for the adsorption of methyl orange onto MRCM. (4) The adsorption thermodynamics indicated that the adsorption was spontaneous, with increasing enthalpy, and was driven by the entropy. (5) The pseudo-second-order kinetics equation was most suitable to describe the adsorption kinetics, and the adsorption kinetics was also controlled by the liquid–film diffusion dynamics. Consequently, MRCM with relatively higher methyl orange adsorption exhibited the great efficiency for methyl orange removal as an environment-friendly sorbent. Thus, the findings are useful for methyl orange pollution control in real-life wastewater treatment applications.

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“…Viscoelastic properties of concentrated and semidilute polymer solutions are well described by two parameters: the dynamic storage modulus, representing the elasticity of the network, and the loss modulus, which accounts for the local friction between polymer chains [25,26]. In the starting stage when G″>G′, both the two moduli increased sharply and an obvious decrease of tanδwas observed, viscosity was dominant over elasticity.…”

Section: Sol-gel Transition Pointsmentioning

confidence: 99%

Preparation and characterization of chitosan gel beads crosslinked by organic titanium

Shen

Gao

2015

J Polym Res

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Chitosan (CTS) gel was successfully prepared by organic titanium (OT) ionic crosslinking agent. The viscoelastic properties of CTS gel was investigated through rheological measurement. The sol-gel transition point (t cr ) of gel prepared with CTS (22.5 g•L −1 ) and OT (1.5 %) was determined at 339 s, with the increases of either CTS or OT concentration, the gelation became faster and the sol-gel transition time became shorter. The optimal chitosan gel beads were prepared with 35 g•L −1 chitosan and 7 % organic titanium (OT) at room temperature for 1 h reaction. The SEM data indicated that the gel beads had special shape with rough and poriferous surface. The effective grain size range was 1.0-1.2 mm. It was confirmed by TG data that the gel beads performed better in thermal stability than original chitosan. Swelling experiments showed that the swelling ability of gel beads strongly depended on the pH value of buffer solution. On the whole, the modified CTS/OT gel beads showed high adsorption capacity, good mechanical properties, strong acidic and alkali resistances, it could serve as potential drug deliver and the absorbent for heavy metal ions.

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Preparation and characterization of magnetic resin made from chitosan and cerium

Cited by 5 publications

References 20 publications

Self-healing protective coatings with “green” chitosan based pre-layer reservoir of corrosion inhibitor

Self-healing protective coatings with “green” chitosan based pre-layer reservoir of corrosion inhibitor

Isotherm, Thermodynamics, and Kinetics of Methyl Orange Adsorption onto Magnetic Resin of Chitosan Microspheres

Preparation and characterization of chitosan gel beads crosslinked by organic titanium

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