Semi-interpenetrating networks of biopolymer chitosan/acrylic acid and thiourea hydrogels: synthesis, characterization and their potential for removal of cadmium

Bhullar, Navneet; Kumari, Kamlesh; Sud, Dhiraj

doi:10.1007/s13726-019-00693-8

Cited by 8 publications

(6 citation statements)

References 29 publications

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“…DTA graph of CAT‐SIPH shows glass transition temperature at197.1°C and a prominent peak at 526.5°C revealing exothermic nature of reaction with release of 103.8 μV energy. The value was higher than the value reported for chitosan demonstrated the formation of the cross‐linked networks 33,42 …”

Section: Characterization Of Cat‐siph Networkcontrasting

confidence: 58%

“…While in the case of chitosan, the absorption band was observed at 3365 cm −1. 33 The peak observed in CAT-SIPH at 1702 cm −1 corresponds to the characteristic adsorption of the CO group which further confirmed the incorporation of acrylic acid chains 39 and the frequency of amine peak get lowered to 1453 cm −1 as compared with stretching frequencies reported for chitosan. A characteristic absorption peak for C=S stretching frequency of CAT-SIPH appeared at 1052 cm −1 and bending vibrations of N-H groups was observed at 799 cm −1 .…”

Section: Ft-ir Spectrum Of Cat-siph Hydrogelsupporting

confidence: 57%

“…The swelling characteristics analysis of the CAT‐SIPH was performed as per the procedure discussed earlier 33 . The swelling analysis of CAT‐SIPN was performed in Millipore water.…”

Section: Methodsmentioning

confidence: 99%

“…The swelling characteristics analysis of the CAT-SIPH was performed as per the procedure discussed earlier. 33 The swelling analysis of CAT-SIPN was performed in Millipore water. The dried hydrogel samples were immersed in Millipore water and swollen gel was withdrawn at regular intervals of time and weighed after removal of excess surface water by light blotting with a filter paper.…”

Section: Swelling Studiesmentioning

confidence: 99%

“…The value was higher than the value reported for chitosan demonstrated the formation of the cross-linked networks. 33,42…”

Section: Thermal Analysis Of Cat-siphmentioning

confidence: 99%

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Amphiphilic chitosan/acrylic acid/thiourea based semi‐interpenetrating hydrogel: Solvothermal synthesis and evaluation for controlled release of organophosphate pesticide, triazophos

Bhullar

Rani

Kumari

et al. 2021

J of Applied Polymer Sci

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The current study reports the solvothermal synthesis of amphiphilic chitosan-based semi-interpenetrating (CAT-SIPH) hydrogel for controlled release of an organophosphate pesticide, triazophos. CAT-SIPH is prepared from natural backbone polymer chitosan (CS) and monomer, acrylic acid (AA) employing initiator (K 2 S 2 O 8), and cross-linker, thiourea (CSN 2 H 4) using solvothermal technique under 7 Psi pressure in an autoclave. The polymerization reaction variables like reaction time, the volume of solvent, concentration of initiator, cross-linker, and monomer are optimized to get the best product yield in terms of percentage grafting. The optimized conditions for solvothermal polymerization reaction carried out for 60 min are solvent volume (10 ml), concentrations of acrylic acid (0.2 mol/L), K 2 S 2 O 8 (0.45 × 10 −2 mol/L) and thiourea (1.75 × 10 −4 mol/L). The swelling behavior of CAT-SIPH hydrogel synthesized under optimized conditions is studied in the terms of swelling ratio. CAT-SIPH is characterized by Fourier transform infrared spectra (FT-IR), I HNMR, thermal analysis (TA), Zeta potential, and scanning electron microscopy (SEM). The potential of cross-linked hydrogel CAT-SIPH for controlled release of an organophosphate pesticide, Triazophos on to sandy loam soil is assessed. The experimental investigations proved that synthesized hydrogel can be effectively employed as a pesticide carrier for controlled release on to loamy soil as the maximum release (53%) is observed even after 25 days at pH 6 and value get lowered under acidic and basic conditions. The present investigation demonstrated the potential of chitosan-based CAT-SIPH hydrogel as a pH-responsive release vehicle for agrochemicals onto the soil matrix and offers a potential solution for the prevention of surface and groundwater contamination.

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Section: Characterization Of Cat‐siph Networkcontrasting

confidence: 58%

Section: Ft-ir Spectrum Of Cat-siph Hydrogelsupporting

confidence: 57%

“…The swelling characteristics analysis of the CAT‐SIPH was performed as per the procedure discussed earlier 33 . The swelling analysis of CAT‐SIPN was performed in Millipore water.…”

Section: Methodsmentioning

confidence: 99%

Section: Swelling Studiesmentioning

confidence: 99%

“…The value was higher than the value reported for chitosan demonstrated the formation of the cross-linked networks. 33,42…”

Section: Thermal Analysis Of Cat-siphmentioning

confidence: 99%

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