Graphite modified sodium alginate hydrogel composite for efficient removal of malachite green dye

Verma, Ankit; Thakur, Sourbh; Mamba, Gcina; Prateek, .; Gupta, Raju Kumar; Thakur, Pankaj; Thakur, Vijay Kumar

doi:10.1016/j.ijbiomac.2020.01.142

Cited by 266 publications

(75 citation statements)

References 46 publications

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“…Approximately, the swelling percentage achieved at 4.5 mL of solvent was 518.7%. Further increments in the solvent volume led to a reduction in the swelling percentage because of a reasonable decrease in the concentration of the initiator (APS), monomer, and cross-linker (NMBA), which resulted in the poor polymerization rate [ 24 ]. The impact of the microwave power on the % swelling of Agr/GE-co-MA/AA hydrogel is presented in Figure 1 d. The results demonstrated that the maximum % swelling was obtained at 20%, and thereafter, it decreased.…”

Section: Resultsmentioning

confidence: 99%

“…However, when the reaction time is longer than 90 s, excessive cross-linking occurred, which results in a more rigid structure. This ultimately leads to a poor water uptake capability [24]. The solvent volumes utilized for the formation of Agr/GE-co-MA/AA hydrogel varied from 3 to 5 mL.…”

Section: Optimization Of Various Reaction Factors For the Swelling Ofmentioning

confidence: 99%

“…The Agr/GE-co-MA/AA copolymer displayed the highest percentage swelling at a cross-linker (NMBA) concentration of 0.16 mol L -1 (Figure 1f). The decrease in percentage swelling with a further increase in the cross-linker concentration was due to the formation of a dense and inflexible Agr/GE-co-MA/AA hydrogel, which was not able to absorb a large amount of water [24]. The copolymer Agr/GE-co-MA/AA hydrogel shows a maximum swelling of 636.1% at the AA concentration of 0.72 × 10 -2 mol L -1 (Figure 1g).…”

Section: Fourier Transform Infrared Analysismentioning

confidence: 99%

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Development of Biodegradable Agar-Agar/Gelatin-Based Superabsorbent Hydrogel as an Efficient Moisture-Retaining Agent

et al. 2020

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Downgrading in the yield of crop is due to the inadequate availability of water. The way out for this trouble is to construct synthetic resources dependent on natural polymers with great water absorption and preservation limits. The present study investigated the design of agar-agar (Agr) and gelatin (GE) copolymerized methyl acrylate (MA) and acrylic acid (AA) hydrogel (Agr/GE-co-MA/AA) as a soil conditioner for moisture maintenance in agriculture. Agr/GE-co-MA/AA hydrogel was prepared by utilizing microwave-assisted green synthesis following the most suitable reaction conditions to obtain a remarkable water swelling percentage. The fabricated Agr/GE-co-MA/AA hydrogel was investigated through field emission scanning electron microscopy (FESEM), fourier transform infrared spectroscopy (FTIR), and X-ray diffraction (XRD). The water holding capacity of the soil and sand was examined by mixing Agr/GE-co-MA/AA hydrogel with soil and sand. The result demonstrates that the water holding time extended from 10 to 30 days for soil and 6 to 10 days for sand by using Agr/GE-co-MA/AA hydrogel. This synthesized biodegradable, low-cost and non-toxic Agr/GE-co-MA/AA hydrogel shows novelty as soil water maintaining material for irrigation in agriculture.

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Section: Resultsmentioning

confidence: 99%

Section: Optimization Of Various Reaction Factors For the Swelling Ofmentioning

confidence: 99%

Section: Fourier Transform Infrared Analysismentioning

confidence: 99%

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Development of Biodegradable Agar-Agar/Gelatin-Based Superabsorbent Hydrogel as an Efficient Moisture-Retaining Agent

et al. 2020

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“…The swelling percentages of gum tragacanth-cl- N,N -dimethylacrylamide and reduced graphene oxide incorporated gum tragacanth-cl- N,N -dimethylacrylamide hydrogels in deionized water were examined for a fixed period of 16 h. The pre-weighed dry piece of the sample was added in 50 mL of distilled water for 16 h. Then, swelled hydrogel was weighed. The swelling percentage was calculated using Equation (1) [ 28 ]:

where, W s = weight of swelled gum tragacanth-cl- N,N -dimethylacrylamide hydrogel, W d = weight of dry gum tragacanth-cl- N,N -dimethylacrylamide hydrogel.…”

Section: Methodsmentioning

confidence: 99%

“…The concentration of adsorbed Hg 2+ and Cr 6+ was calculated by evaluating the absorbance of heavy metal ion solution using UV-Vis spectrophotometer at 532 nm and 370 nm respectively. The amount of adsorbed Hg 2+ and Cr 6+ was calculated by Equation (2) [ 28 ]:

where q e = equilibrium gum tragacanth-cl- N,N -dimethylacrylamide and reduced graphene oxide incorporated gum tragacanth-cl- N,N -dimethylacrylamide adsorption capacity, C o = initial Hg 2+ and Cr 6+ concentration (mg L −1 ), C e = equilibrium Hg 2+ and Cr 6+ concentration (mg L −1 ), V = volume (L) of Hg 2+ and Cr 6+ ion solution, M = weight (g) of gum tragacanth-cl- N,N -dimethylacrylamide and reduced graphene oxide incorporated gum tragacanth-cl- N,N -dimethylacrylamide hydrogels. Adsorption-desorption analyses were conducted by using 0.1 M HNO 3 .…”

Section: Methodsmentioning

confidence: 99%

Microwave-Assisted Rapid Synthesis of Reduced Graphene Oxide-Based Gum Tragacanth Hydrogel Nanocomposite for Heavy Metal Ions Adsorption

et al. 2020

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Reduced graphene oxide (RGO) was synthesized in this research via Tour’s method for the use of filler in the hydrogel matrix. The copolymerization of N,N-dimethylacrylamide (DMA) onto the gum tragacanth (GT) was carried out to develop gum tragacanth-cl-N,N-dimethylacrylamide (GT-cl-poly(DMA)) hydrogel using N,N'-methylenebisacrylamide (NMBA) and potassium persulfate (KPS) as cross-linker and initiator correspondingly. The various GT-cl-poly(DMA) hydrogel synthesis parameters were optimized to achieve maximum swelling of GT-cl-poly(DMA) hydrogel. The optimized GT-cl-poly(DMA) hydrogel was then filled with RGO to form reduced graphene oxide incorporated gum tragacanth-cl-N,N-dimethylacrylamide (GT-cl-poly(DMA)/RGO) hydrogel composite. The synthesized samples were used for competent adsorption of Hg2+ and Cr6+ ions. Fourier transform infrared, X-ray powder diffraction, field emission scanning electron microscopy, energy-dispersive X-ray spectroscopy were used to characterize the gum tragacanth-cl-N,N-dimethylacrylamide hydrogel and reduced graphene oxide incorporated gum tragacanth-cl-N,N-dimethylacrylamide hydrogel composite. The experiments of adsorption-desorption cycles for Hg2+ and Cr6+ ions were carried out to perform the reusability of gum tragacanth-cl-N,N-dimethylacrylamide hydrogel and reduced graphene oxide incorporated gum tragacanth-cl-N,N-dimethylacrylamide hydrogel composite. From these two samples, reduced graphene oxide incorporated gum tragacanth-cl-N,N-dimethylacrylamide exhibited high adsorption ability. The Hg2+ and Cr6+ ions adsorption by gum tragacanth-cl-N,N-dimethylacrylamide and reduced graphene oxide incorporated gum tragacanth-cl-N,N-dimethylacrylamide were best suited for pseudo-second-order kinetics and Langmuir isotherm. The reported maximum Hg2+ and Cr6+ ions adsorption capacities were 666.6 mg g-1 and 473.9 mg g-1 respectively.

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Antibacterial Collagen‐Based Nanocomposite Dressings for Promoting Infected Wound Healing

Liao

Yang

et al. 2023

Adv Healthcare Materials

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Pathogenic bacterial infection is the most frequent wound complication, which has become a major clinical and healthcare challenge in wound management worldwide, leading to impaired healing processes, the risk of amputation, and even death. Here, collagen-based nanocomposite dressings (APZC) with broad-spectrum antibacterial activity are developed to promote the infected full-thickness wound healing. Short rod-like shaped ZnO NPs are synthesized and then coated with polydopamine (PDA) to obtain PDA coated ZnO NPs (PDA@ZnO NPs). Afterward, PDA@ZnO NPs are conjugated on the backbone of a collagen chain, and the obtained collagen-PDA@ZnO NPs conjugate is crosslinked by dialdehyde sodium alginate to fabricate APZC dressings. PDA@ZnO NPs show well dispersibility and are uniformly incorporated into the collagen matrix. APZC dressings have interconnected microporous structure and great physicochemical properties, besides good blood coagulation performance and well cytocompatibility. APZC dressings demonstrate long-lasting and excellently broad-spectrum antimicrobial activity, which can relieve the inflammatory reaction by killing pathogenic bacteria and induce the generation of blood vessels and the orderly deposition of collagen in the wound site, thus promoting infected full-thickness wound healing without obvious scar formation. Overall, the functionalized collagen-based nanocomposite dressings have great potential in the clinical treatment against bacteria-associated wound infection.

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Graphite modified sodium alginate hydrogel composite for efficient removal of malachite green dye

Abstract: et al., Graphite modified sodium alginate hydrogel composite for efficient removal of malachite green dye,

Cited by 266 publications

References 46 publications

Development of Biodegradable Agar-Agar/Gelatin-Based Superabsorbent Hydrogel as an Efficient Moisture-Retaining Agent

Development of Biodegradable Agar-Agar/Gelatin-Based Superabsorbent Hydrogel as an Efficient Moisture-Retaining Agent

Microwave-Assisted Rapid Synthesis of Reduced Graphene Oxide-Based Gum Tragacanth Hydrogel Nanocomposite for Heavy Metal Ions Adsorption

Antibacterial Collagen‐Based Nanocomposite Dressings for Promoting Infected Wound Healing

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