Carboxymethlyated cellulose nanofibrils(CMCNFs) embedded in polyurethane foam as a modular adsorbent of heavy metal ions

Hong, Hye‐Jin; Lim, Jin Seong; Hwang, Jun Yeon; Kim, Mi-Kyung; Jeong, Hyeon Su; Park, Min Sang

doi:10.1016/j.carbpol.2018.04.081

Cited by 100 publications

(36 citation statements)

References 51 publications

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“…The reaction with MDI is ascribed to the presence of rich hydroxyl group within the particles. Studies showed that polyurethane can be obtained respectively from cellulose [ 31 ], hemicellulose [ 32 ], and lignin [ 33 ]. As reported by Schultz-Jensen et al.…”

Section: Resultsmentioning

confidence: 99%

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Polyurethane film prepared from ball-milled algal polyol particle and activated carbon filler for NH3–N removal

Marlina

Iqhrammullah

Saleha

et al. 2020

Heliyon

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This research offers a novel approach of free chemical preparation to obtain algae-based biopolyol through a ball milling method. The algae-based polyurethane (AlgPU) film was obtained from a casting solution made of ball-milled algal polyol particle and methylene diphenyl diisocyanate (MDI). The characteristics of the material had been investigated using Fourier Transform Infrared, Scanning Electron Microscopy – Electron Dispersive Spectroscopy, Differential Scanning Calorimetry, and Tensile Strength Analysis. The surface area was determined by Brunauer–Emmett–Teller (BET) isotherm, meanwhile the total pore volume was by Barrett-Joyner-Halenda (BJH) isotherm, based on the adsorption-desorption of N 2 . The addition of activated carbon contributed in the increase of functional group and surface area, which were important for the NH 3 –N removal. As a result, the adsorption capacity increased greatly after the addition of activated carbon (from 187.84 to 393.43 μg/g). The results also suggested AlgPU as a good matrix for immobilizing activated carbon filler. The adsorption shows a better fit with Langmuir isotherm model, with R 2 = 0.97487 and root-mean-square error (RMSE) = 33.91952, compared to Freundlich isotherm model (R 2 = 0.96477 and RMSE = 44.05388). This means the NH 3 –N adsorption followed the assumption of homogenous and monolayer adsorption, in which the maximum adsorption was found to be 797.95 μg/g. This research suggests the potential of newly developed material for NH 3 –N removal.

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Section: Resultsmentioning

confidence: 99%

“…A more complex absorbance of collective NH bending and CN stretching is also observable at 1550-1530 cm −1 , which can be assigned to amide II band. The presence of amide I and amide II bands at the FT-IR spectra suggest the presence of protein contents, which is commonly found in plant samples [ 16 , 17 , 31 , 39 ].…”

Section: Resultsmentioning

confidence: 99%

Polyurethane film prepared from ball-milled algal polyol particle and activated carbon filler for NH3–N removal

Marlina

Iqhrammullah

Saleha

et al. 2020

Heliyon

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“…The addition of glycerol to the polyol mixture prevented the shrinkage and increased flexibility. Without the addition of glycerol, the foam experienced shrinkage and had higher rigidity [14]. Glycerol acted as a cross-linking agent, allowing the COPUF to sustain its structure, especially during the foam development phase.…”

Section: Reaction Of Modified Puf and Functional Groups' Analysismentioning

confidence: 99%

“…Absorbance at the wavenumber 2200 cm −1 indicates the presence of C=N=O, which is associated with the excess of MDI. Z/COPUF had the highest absorbance intensity at the wavenumber (around 50% higher), indicating the unreacted MDI [14]. This is because the big size of zeolite particles may form an aggregate, thus hindering the reaction between the hydroxyl groups from the castor oil and the MDI's isocyanate groups.…”

Section: Reaction Of Modified Puf and Functional Groups' Analysismentioning

confidence: 99%

“…Polymeric materials have been extensively studied for their application in toxic metals removals, such as alginate-based composite [10], β-cyclodextrin nano-sponge [11], and cellulose membrane [12]. Other than those polymers, polyurethane (PU) has gained many interests in academic research for its adsorption ability to remove multiple heavy metal ions [13,14]. The interest in PU adsorbent is because the material can be easily manufactured and shaped [15].…”

Section: Introductionmentioning

confidence: 99%

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Filler-Modified Castor Oil-Based Polyurethane Foam for the Removal of Aqueous Heavy Metals Detected Using Laser-Induced Breakdown Spectroscopy (LIBS) Technique

et al. 2020

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The use of polymeric material in heavy metal removal from wastewater is trending. Heavy metal removal from wastewater of the industrial process is of utmost importance in green/sustainable manufacturing. Production of absorbent materials from a natural source for industrial wastewater has been on the increase. In this research, polyurethane foam (PUF), an adsorbent used by industries to adsorb heavy metal from wastewater, was prepared from a renewable source. Castor oil-based polyurethane foam (COPUF) was produced and modified for improved adsorption performance using fillers, analyzed with laser-induced breakdown spectroscopy (LIBS). The fillers (zeolite, bentonite, and activated carbon) were added to the COPUF matrix allowing the modification on its surface morphology and charge. The materials were characterized using Fourier-transform infrared (FTIR), scanning electron microscopy (SEM), and thermal gravimetry analysis (TGA), while their adsorption performance was studied by comparing the LIBS spectra. The bentonite-modified COPUF (B/COPUF) gave the highest value of the normalized Pb I (405.7 nm) line intensity (2.3), followed by zeolite-modified COPUF (Z/COPUF) (1.9), and activated carbon-modified COPUF (AC/COPUF) (0.2), which indicates the adsorption performance of Pb2+ on the respective materials. The heavy metal ions’ adsorption on the B/COPUF dominantly resulted from the electrostatic attraction. This study demonstrated the potential use of B/COPUF in adsorption and LIBS quantitative analysis of aqueous heavy metal ions.

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Chemistry and Nanotechnology‐Oriented Strategies toward Nanocellulose for Human Water Treatment

Zha

Shi

et al. 2022

Advanced Sustainable Systems

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Carboxymethlyated cellulose nanofibrils(CMCNFs) embedded in polyurethane foam as a modular adsorbent of heavy metal ions

Cited by 100 publications

References 51 publications

Polyurethane film prepared from ball-milled algal polyol particle and activated carbon filler for NH3–N removal

Polyurethane film prepared from ball-milled algal polyol particle and activated carbon filler for NH3–N removal

Filler-Modified Castor Oil-Based Polyurethane Foam for the Removal of Aqueous Heavy Metals Detected Using Laser-Induced Breakdown Spectroscopy (LIBS) Technique

Chemistry and Nanotechnology‐Oriented Strategies toward Nanocellulose for Human Water Treatment

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