Syhnthesis of Chitosan Modified Polyurethane Foam for Adsoprtion of Mercury (Ii) Ions

Darmadi, Darmadi; Irfan, Muhammad; Iqhramullah, Muhammad; Marlina, Marlina; Lubis, Mirna Rahmah

doi:10.15294/jbat.v7i1.13614

Cited by 6 publications

(7 citation statements)

References 9 publications

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“…The reduction in the hydrogen bonds freed the molecules for intermolecular interaction. The intermolecular attraction induced between similar molecules resulted in the formation of the agglomerate [38]. properties confirmed the bond formed between the -OH and isocyanate, as observed in the FTIR results.…”

Section: Mechanical Propertiessupporting

confidence: 77%

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Characterization and Performance Evaluation of Cellulose Acetate–Polyurethane Film for Lead II Ion Removal

et al. 2020

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Global pollution from toxic metal waste has resulted in increased research on toxic metal adsorption. A cellulose acetate–polyurethane (CA–PU) film adsorbent was successfully prepared in this research. The cellulose acetate–polyurethane film adsorbent was prepared with a polycondensation reaction between cellulose acetate and methylene diphenyl diisocyanate. The CA–PU bond formation was confirmed by functional group analysis obtained from Fourier transform infrared (FTIR) spectroscopy. The obtained film was characterized for improved tensile and thermal properties with the addition of methylene diphenyl diisocyanate (MDI). The adsorption ability of the obtained film was evaluated with laser-induced breakdown spectroscopy (LIBS). The best film adsorbent from the LIBS was selected and studied for adsorption isotherm. The FTIR analysis confirmed the formation of the CA–PU bond from the polycondensation between cellulose acetate and the methylene diphenyl diisocyanate. The result showed that the addition of methylene diphenyl diisocyanate (MDI) resulted in the urethane network’s growth. The characterization result showed an improvement in the morphology, thermal stability, and tensile strength of the film. The LIBS studies showed improvement in the adsorption of Pb2+ with CA–PU compared with the neat CA. The isotherm studies revealed that Pb2+ adsorption by cellulose acetate–polyurethane film adsorbent was heterogeneously dependent on the Freundlich isotherm model (R2 = 0.97044). Overall, the polycondensation method proposed by this study enhanced the Pb2+ removal, and was comparable to those reported in previous studies.

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Section: Mechanical Propertiessupporting

confidence: 77%

Section: Resultsmentioning

confidence: 99%

Characterization and Performance Evaluation of Cellulose Acetate–Polyurethane Film for Lead II Ion Removal

et al. 2020

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“…After that, the MDI was added dropwise at the same rotation speed and temperature for another 20 s until the air bubbles were formed. The ratio of castor oil and MDI was 2:1, as adding more or less MDI than the stated ratio resulted in a deformed foam structure [22]. The modified COPUF with zeolite, bentonite, and activated carbon filters were respectively denoted as Z/COPUF, B/COPUF, and AC/COPUF.…”

Section: Synthesis Of Modified Pufmentioning

confidence: 99%

“…This study used castor oil as the bio-polyol feed because, unlike many other vegetable oils, castor oil possesses active secondary hydroxyl groups, which can react with the isocyanate to form a urethane linkage [15]. Due to its easy shape-tailoring, the addition of water into the polyol and diisocyanate mixture is enough to get the polyurethane foam (PUF) [22]. This material can appear in an open or closed cell structure with a wide range of rigidity (rigid, semirigid, and flexible foam) [19].…”

Section: Introductionmentioning

confidence: 99%

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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“…The use of chitosan coater is the right alternative, it is effective and safe for health (Hardjito, 2006). Chitosan is famous for its properties that can be used as adsorbents (Darmadi et al, 2018;Rahayu & Purnavita, 2017), coater (Khalifaa et al, 2017), antimicrobials (Friedman & Juneja, 2010) etc.…”

Section: Introductionmentioning

confidence: 99%

Potential of Chitosan From Local Crab (Portunus Pelagicus) to Enhance Storability of Musa Paradisiaca L.

Buanasari¹,

Sugiyo²,

Fitriani³

et al. 2019

JBAT

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Potential waste of local crab carapace (Portunus pelagicus) as a source of chitosan as an active layer that can protect bananas has been studied. The process in this study consists of three stages. The first stage was the isolation of chitin through deproteinization process using 2.0 N NaOH solution with a ratio of 1:6 w/v and demineralization process using 1.5 N HCl solution with a ratio of 1:12 w/v. The second stage is the deacetylation stage using 50% NaOH solution with a ratio of 1:20 w/v. Fourier Transform Infra-Red (FTIR) Spectroscopy is used to determine the degree of deacetylation. The third stage is the banana coating application using chitin solution to determine the shelf life of bananas with variations in levels of 2, 2.5, 3 and 3,5 % w/v by immersion method for one hour. It was found that carapace crab, a part that was underutilized from crab, gave rise to chitin deacetylation with a deacetylation rate of 62.11%; pH 8.9 and water content of 7.677%. Chitosan-based coatings are applied to fresh bananas and are found to increase fruit firmness, and inhibit browning. The results show that chitosan-coated bananas have a longer storage time. The application of chitin deacetylated (chitosan) as fruit banana coater found that higher coater levels extend the shelf life of bananas with the best coater content is 3% b/v. It results in a shelf life of bananas for up to 12 days, this is longer than bananas without chitosan layer which only has a shelf life of four days. Increased coating rates have a positive effect on the shelf life of bananas. This study shows that waste from carapace crabs can be used to form active layers that can preserve fruit.

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Syhnthesis of Chitosan Modified Polyurethane Foam for Adsoprtion of Mercury (Ii) Ions

Cited by 6 publications

References 9 publications

Characterization and Performance Evaluation of Cellulose Acetate–Polyurethane Film for Lead II Ion Removal

Characterization and Performance Evaluation of Cellulose Acetate–Polyurethane Film for Lead II Ion Removal

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

Potential of Chitosan From Local Crab (Portunus Pelagicus) to Enhance Storability of Musa Paradisiaca L.

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