Synthesis and characterization of pH- and thermoresponsive Poly(N-isopropylacrylamide-co-itaconic acid) hydrogels crosslinked with N-maleyl chitosan

Yu, Yueqin; Li, Yanshun; Liu, Lingxiu; Zhu, Chunjing; Yang, Xu

doi:10.1007/s10965-010-9417-1

Cited by 38 publications

(4 citation statements)

References 29 publications

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“…In acidic solutions (pH=2 and pH=4), most of the residual amine groups are in the −NH 3 + form, while most of the carboxyl groups are in the −COOH form. The protonation of amino groups increases the charge density on the polymer, and enhances electrostatic repulsions between CMTC and kaolin particles, which enables an attraction In neutral media (pH=6), the majority of amino groups and acid groups were in −NH 3 + and −COO − forms 25 , so the opposite charges could induce adsorption on kaolin particles' edges and faces respectively. In addition, the interionic attractions between opposite charges resulted in molecular curling.…”

Section: Ph Dependence Of Dispersion Stabilitymentioning

confidence: 99%

Synthesis and Characterization of N-(carboxy-methylthioureido)-Chitosan and its Dispersion Capability

Liu

Nie

2011

Polymers and Polymer Composites

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Water-soluble N-carboxymethylthioureidochitosan (CMTC) was synthesized by the reaction between chitosan (CTS) and ammonium thiocyanate and chloroacetic acid in a hydrochloric acid aqueous solution. The modified product was confirmed by Fourier transform infrared (FTIR) spectrometry, X-ray diffractometry (XRD) and thermal analysis. The results showed that new functional groups had been linked to amino groups of CTS molecules, and the product was more amorphous than CTS. The dispersion stability of CMTC was examined with a sedimentation test of 1 wt.% kaolin suspension in test tubes, under different concentrations and different pH. The results indicated that CMTC may be applicable for use as a novel stabilizer in neutral solution in which the concentration of CMTC is 0.5% or 1%.

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Section: Ph Dependence Of Dispersion Stabilitymentioning

confidence: 99%

Synthesis and Characterization of N-(carboxy-methylthioureido)-Chitosan and its Dispersion Capability

Liu

Nie

2011

Polymers and Polymer Composites

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“…In general, natural monomer-based nanocomposite hydrogels are biodegradable, highly hydrophilic and they possess good biomedical properties [4]. Besides, itaconic acid provides its outstanding assets in polymer chemistry, pharmaceutical, and agricultural applications [5].…”

Section: Introductionmentioning

confidence: 99%

Gold nanoparticles embedded itaconic acid based hydrogels

Sakthivel

Franklin²,

Sudarsan

et al. 2019

SN Appl. Sci.

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Traditional hydrogels have shown substandard multifunctional, mechanical properties in biomedical field. Gold nanoparticles can provided an expanded array of nanostructured materials with exclusive biomedical properties. The nanocomposite hydrogels have expected to exhibit both nanomaterial and hydrogel properties, which may resulted in potential applications in biomedical field. Hence, the present investigation reported simple and greener approach to the preparation and properties of pH-responsive nanocomposite hydrogels (GIAE) based on itaconic acid (IA), acrylic acid, ethylene glycol and colloidal gold nanoparticles. The obtained nanocomposite hydrogels found to have desired exfoliated surface morphology and enhanced pH-sensitive swelling and thermal stability. It also showed appreciable anti-microbial properties due to presence of gold nanoparticles and IA. The cytotoxicity nature of itaconic acid based gold nanocomposite hydrogels were also developed ~ 90% due gold nanoparticles. Moreover, the degradation property of prepared nanocomposite hydrogels have been reduced due to bacterial inhibition tendency of gold nanoparticles. This work provides viewpoints to develop pH-tunable GIAE nanocomposite hydrogels with significant biological properties. The resultant nanocomposite hydrogels may be recommended for biomedical applications mere in future such as pH-sensitive drug delivery, scaffold for tissue engineering, wound healing application, antimicrobial material and nanomedicine etc.

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“…As a synthetic monomer, a bicarboxylic acid such as IA would be more appropriate than the conventional monocarboxylic acrylic monomers with respect to adsorption properties of the resulting polymers. A very small amount of IA repeating units in a polymer hydrogel renders good pH sensitivity and increases the swelling capacity. , However, due to low reactivity, diprotic itaconic acid cannot homopolymerize on its own, but it may be grafted to a natural polymer or copolymerized with other monomers to prepare functional adsorbents. Several adsorbents based on itaconic acid were reported for removal of heavy metal ions from water.…”

Section: Introductionmentioning

confidence: 99%

Competitive Removal of Cu(II) and Cd(II) from Water Using a Biocomposite Hydrogel

Maity

Ray

2017

J. Phys. Chem. B

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With an objective to improve the adsorption properties of a synthetic hydrogel, potato starch (PS) was incorporated in the ter-copolymer (TP) of acrylic acid (AA), acrylamide (AM), and bicarboxylic itaconic acid (IA) during polymerization of the monomers. The resulting TP-PS composite hydrogels were characterized by Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), thermogravimetric analysis (TGA), nuclear magnetic resonance (NMR), scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM/EDX), and rheological properties. These hydrogels were used for removal of Cu(II) and Cd(II) as single and binary competitive mixtures from water. The effect of PS as well as various physicochemical parameters such as solution pH, adsorbent dosage, contact time of gel with metal ion in water, and concentration of metal ion in water was studied in batch experiments. The adsorption results indicated that the gels could be used as an efficient adsorbent for removal of Cu(II) and Cd(II) from water as single as well as binary mixtures. The TP-PS4 gel containing 4 wt % starch showed a removal % of 85.8 and 77.6 and adsorption capacity (mg/g gel) of 214.5 and 193.9 for Cu(II) and Cd(II), respectively, from water containing 50 mg/L of each of these metal ions in a solution pH of 5.5 and a dose of only 0.2 g/L gel.

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Synthesis and characterization of pH- and thermoresponsive Poly(N-isopropylacrylamide-co-itaconic acid) hydrogels crosslinked with N-maleyl chitosan

Cited by 38 publications

References 29 publications

Synthesis and Characterization of N-(carboxy-methylthioureido)-Chitosan and its Dispersion Capability

Synthesis and Characterization of N-(carboxy-methylthioureido)-Chitosan and its Dispersion Capability

Gold nanoparticles embedded itaconic acid based hydrogels

Competitive Removal of Cu(II) and Cd(II) from Water Using a Biocomposite Hydrogel

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