Mechanochemical conversion of cellulose acetate from residues to cellulosic nanospheres for emulsion application

Borges, Roger; Amaral, Lilian Fernanda Martins do; Bondancia, Thalita J.; Freitas, Rilton Alves de; Ribeiro, Cauê

doi:10.1016/j.jece.2023.110119

Cited by 10 publications

(2 citation statements)

References 28 publications

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“…It's perfect mechanochemical stability has been demonstrated through use in a variety of contexts. Its recovery and reutilization using simple mechanochemical treatment in a solid basic media has been demonstrated by Borges et al [86]. This process may hydrolyze acetate moieties and simultaneously reduce particle size.…”

Section: Evaluation Of Antibacterial Activity Of Antioxidants Interca...mentioning

confidence: 99%

The antimicrobial synergy of polymer based nanofiber mats reinforced with antioxidants intercalated layered double hydroxides as a potential active packaging material

Madhushika,

Yapa,

Munaweera

et al. 2024

Nano Ex.

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Perishable food post-harvest loss is a major global concern, and research is currently concentrated on creating active packaging materials. This research is focused in multiple antioxidants intercalated Layered Double Hydroxides (LDH) that are combined in one matrix, and their overall effect that defines as synergism, which successfully preserves perishable food by releasing antioxidants slowly. For this purpose, a hybrid LDH material of ascorbic-LDH, salicylic-LDH, and citric-LDH was synthesized, characterized and incorporate into electrospun nanofiber mat to be used as a potential active packaging material. Antioxidants intercalated Mg/Al LDH was synthesized and successfully characterized by PXRD, FTIR, XPS, Raman, SEM and EDS. The shifts in the LDHs' peaks in PXRD indicated the successful incorporation of antioxidants into LDH. FTIR, Raman and XPS data clearly indicated the establishment of metal-oxygen bonds by observing the characteristic peaks. Morphological features and layered structure were clearly observed by SEM images. Antioxidants were slowly released from LDHs, and it was evaluated for time intervals up to 24 hrs. The hybrid LDH material exhibited the highest antioxidant activity with an IC50 value of 132.5µg/mL, where 234.1, 354.5, and 402.2µg/mL were reported for ascorbic-LDH, salicylic-LDH, and citric-LDH respectively. The hybrid LDH material incorporated electrospun mats showed the best antibacterial activity against the tested bacteria and clearly evidenced the synergistic activity of the combination of the nanohybrids. It has showed a minimal bacterial growth compared to other control samples (∼2.41 log CFU/mL). The shelf life of cherry tomatoes was studied at different physiochemical parameters with and without hybrid LDH material incorporated electrospun mats. The mat showed an extended shelf life of 42 days for cherry tomatoes, whereas the control sample showed a shelf life of 17 days. It is concluded that hybrid LDH material exhibited synergistic performance and the best antioxidant activity when comparing with mono LDH materials.

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Section: Evaluation Of Antibacterial Activity Of Antioxidants Interca...mentioning

confidence: 99%

The antimicrobial synergy of polymer based nanofiber mats reinforced with antioxidants intercalated layered double hydroxides as a potential active packaging material

Madhushika,

Yapa,

Munaweera

et al. 2024

Nano Ex.

View full text Add to dashboard Cite

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“…Hydrothermal treatments (HT) are thermochemical processes occurring at medium temperature and high pressure in the presence of water as solvent/reagent in sub and supercritical states. , The hydrothermal liquefaction process has been successfully applied in the chemical recycling of plastics to produce monomers, chemicals, and fuels . The recycling of cellulose acetate by thermochemical processes was already addressed by many authors, especially the pyrolysis of cigarette filters which are mainly made of cellulose acetate with the aim of producing chemicals, fuels, and porous carbon material. − Pyrolysis of cigarette butt filters was investigated by Jankovic et al for the production of porous char having characteristics of a macroporous material with developed mesoporosity suitable to be used in wastewater treatments . The thermochemical degradation of cellulose acetate by HT is poorly investigated, Combs and Woodstone filed a patent on the recovery of a general cellulose acetate waste by hydrolysis in the presence of a hydrolyzing agent, acetic acid, to obtain valuable products such as glucose molecules and reduce the amount of solid which needs to be landfilled .…”

Section: Introductionmentioning

confidence: 99%

Chemical Recycling of Cellulose Acetate Eyewear Industry Waste by Hydrothermal Treatment

Bracciale,

de Caprariis,

Musivand

et al. 2024

Ind. Eng. Chem. Res.

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Cellulose acetate waste from eyewear industry is produced in considerable amounts, and its biodegradability is not straightforward due to the presence of plasticizers and the slow kinetics of deacetylation reactions. In this work, the chemical recycling of cellulose acetate waste coming from eyewear industry is proposed through hydrothermal treatment with the aim of acetic acid and diethyl phthalate recovery. Cellulose acetate was first characterized to determine the acetylation degree which was measured to be 2.45 and the amount of diethyl phthalate which was 30% by weight. Hydrothermal tests were performed in batch 10 mL reactors studying the influence of temperature (190−250 °C) and reaction time (10− 240 min). The products were characterized by gas chromatography− mass spectrometry and Fourier transformed IR analysis, in order to determine the acetic acid and diethyl phthalate recovery percentage. The maximum recovery of acetic acid, 90%, was obtained at 250 °C for a reaction time of 30 min; in these conditions, the diethyl phthalate extracted was about 20% by weight, which is 65% of recovery. The diethyl phthalate undergoes a hydrolysis reaction at high temperatures and long reaction times, decreasing its recovery degree. The diethyl phthalate is recovered mainly in the liquid phase extracted with ethanol and for 210 °C and 60 min and 190, 240 min it is almost pure (>97%), with a recovery efficiency of 87%. Cellulose decomposition products, mainly 5-(hydroxymethyl)furfural, were detected in the liquid products with an increase raising the reaction temperature and time. Aspen Plus simulation was performed in order to figure out the whole process including the separation of the products; a preliminary energy balance indicates that combustion of the solid residue can contribute to lower the energy required for the process, which results in 800 MJ/h for a plant capacity of 10 ton day −1 .

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Recent advances in cellulose nanospheres: production, formation mechanisms, properties and applications

Yupanqui-Mendoza,

Arantes

2024

Cellulose

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Mechanochemical conversion of cellulose acetate from residues to cellulosic nanospheres for emulsion application

Cited by 10 publications

References 28 publications

The antimicrobial synergy of polymer based nanofiber mats reinforced with antioxidants intercalated layered double hydroxides as a potential active packaging material

The antimicrobial synergy of polymer based nanofiber mats reinforced with antioxidants intercalated layered double hydroxides as a potential active packaging material

Chemical Recycling of Cellulose Acetate Eyewear Industry Waste by Hydrothermal Treatment

Recent advances in cellulose nanospheres: production, formation mechanisms, properties and applications

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