Synthesis, characterization and electrospinning of corn cob cellulose-graft-polyacrylonitrile and their clay nanocomposites

Kalaoğlu, Özlem I.; Ünlü, Cüneyt H.; Atici, Oya Gali̇oğlu

doi:10.1016/j.carbpol.2016.03.073

Cited by 14 publications

(11 citation statements)

References 30 publications

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“…So lignin is a better raw material candidate than cellulose for preparing slow‐release urea fertilizers. Mt is a hydrated, layered silicate minerals with a smectite structure (2:1 clay minerals), that is capable of exchanging cations and intercalating neutral species between its adjacent inorganic platelets through its interaction with structural water . A select quantity of Mt in soil can improve the water retention of the soil, helping form a good soil granulation structure, and it can also be used to remove heavy metals and organic pesticides from soil, which can be helpful in agricultural production.…”

Section: Introductionmentioning

confidence: 99%

Lignin improves release behavior of slow‐release fertilizers with high content of urea

Zhang

et al. 2019

J of Applied Polymer Sci

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To develop a slow-release fertilizer with high content of urea, lignin was heated with urea-montmorillonite (M/U) extruded composites to synthesize a novel composite-lignin/montmorillonite/urea (L/M/U). Mechanical test results of the composites showed that the L/M/U exhibited a greater flexure strength and a higher elastic modulus than the unmodified M/U extruded material. Based on the results of the urea release experiments, in the M/U extruded composites, the material with a high urea content exhibited a high urea release rate. By contrast, although the urea content of the 2:1:4 L/M/U formulation was higher than the 2:1:1 and 2:1:2 L/M/U formulations, the former formulation exhibited a lower urea release rate than the latter two formulations. The urea cumulative release (34.6%) of the L/M/U 2:1:4 after 105 h was also lower than that (93.7%) of the M/U 1:1 although the W urea (57.1 wt %) in the former was higher than the W urea (50.0 wt %) in the latter.

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Section: Introductionmentioning

confidence: 99%

Lignin improves release behavior of slow‐release fertilizers with high content of urea

Zhang

et al. 2019

J of Applied Polymer Sci

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“…Radical generation from cellulose is related with a chelate complex formation (8,9). Thus a similar path is expected for chitosan; the formed radical may be on nitrogen, oxygen, or carbon (Figure 1).…”

Section: Resultsmentioning

confidence: 69%

“…Ceric ion initiated polymerizations are widely used for aqueous grafting vinyl polymers onto reducing agents which has one or more O-H groups (6), i.e. PEG (7), cellulose (8,9), and xylan (10). Initiation step involves oxidation of O-H groups through a radical pathway.…”

Section: Chitosanmentioning

confidence: 99%

Chitosan-Graft-Polyacrylamide Based Release Systems: Effect of pH and Crosslinking

KÜÇÜKÇALIK

Ünlü

2022

Journal of the Turkish Chemical Society Section A: Chemistry

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This study covers the synthesis and release behavior of chitosan-graft-polyacrylamide copolymers in aqueous media at different pH values. The copolymers were synthesized using redox polymerization with ceric ammonium nitrate (CAN) in 1% aqueous acetic acid solution as the initiator. Optimum condition for the graft copolymer synthesis was determined as 3.85 g/L chitosan, 0.27 M acrylamide (AAm) monomer at 40 °C with a CAN per gram chitosan as 6 mmol using 0.05 M stock solution in 0.1 N HNO3. Then the crosslinked copolymers were synthesized using methylenebisacrylamide (MBA) as a crosslinker varying mass proportions of AAm:MBA as 15:1, 20:1, and 30:1. Obtained material amount (polymer yield) and molecular weight of crosslinked copolymers were lower than the graft copolymer as expected. Acetylsalicylic acid (ASA) release behaviors of all copolymers were monitored with UV-visible spectroscopy at different pH values (2, 6, and 8.5) corresponding to different media in the body (stomach, skin, and intestine, respectively). According to the results, the release behavior changed the least among the samples with respect to medium pH and of was the most affected.

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“…43,44 Among these types of materials, Cell-based nanocomposites can be considered as low cost, renewable, eco-friendly, and durable alternative with a wide verity of applications for some currently available synthetic polymeric materials. 45,46 In the present study, Cell was modified through the grafting of polystyrene (PSt) using NMP technique, and its PCN was prepared by a solution intercalation method. For this purpose, Cell was acylated, and then 2,2,6,6-tetramethyl-1-piperidinyloxy (TEMPO) was immobilized onto Cell backbone using a nucleophilic substitution reaction to produce Cell-TEMPO macroinitiator.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Nitroxide-mediated graft copolymerization of styrene from cellulose and its polymer/montmorillonite nanocomposite

Abbasian

Bakhshi

Jaymand

et al. 2018

Journal of Elastomers & Plastics

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Nitroxide-mediated polymerization was successfully employed for well-defined graft copolymerization of styrene (St) monomer from cellulose (Cell) backbone. For this purpose, Cell was acylated by 2-bromoisobutyryl bromide, and then 2,2,6,6-tetramethyl-1-piperidinyloxy (TEMPO) was immobilized onto Cell backbone using a nucleophilic substitution reaction to produce Cell-TEMPO macroinitiator. Afterward, St monomer was grafted onto Cell backbone through “grafting from” technique. The successful synthesis of Cell- g-polystyrene (PSt) copolymer was confirmed using Fourier transform infrared and proton nuclear magnetic resonance spectroscopies and scanning electron microscopy analysis. Finally, Cell- g-PSt/montmorillonite nanocomposite was fabricated through solution intercalation approach. The thermal properties and structural morphology of the resultant nanocomposite were investigated using thermogravimetric analysis and differential scanning calorimetry and transmission electron microscopy, respectively.

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Synthesis, characterization and electrospinning of corn cob cellulose-graft-polyacrylonitrile and their clay nanocomposites

Cited by 14 publications

References 30 publications

Lignin improves release behavior of slow‐release fertilizers with high content of urea

Lignin improves release behavior of slow‐release fertilizers with high content of urea

Chitosan-Graft-Polyacrylamide Based Release Systems: Effect of pH and Crosslinking

Nitroxide-mediated graft copolymerization of styrene from cellulose and its polymer/montmorillonite nanocomposite

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