Synthesis and Characterization of Blended Cellulose Acetate Membranes

Asiri, Abdullah M.; Petrosino, Francesco; Pugliese, Valerio; Khan, Sher Bahadar; Alamry, Khalid A.; Alfifi, Soliman Y.; Marwani, Hadi M.; Alotaibi, Maha M.; Algieri, Catia; Chakraborty, Sudip

doi:10.3390/polym14010004

Cited by 35 publications

(15 citation statements)

References 31 publications

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“…The peaks at 3500 cm −1 can be attributed to the −OH group, while those at 1743, 1270, and 1050 cm −1 correspond to the stretching of C−O group, ether group and −C-O bond of the −CH 2 −OH group, respectively. 30,31 Additionally, a new peak for the Zn−O vibration is identified at around 477 cm −1 , which supports the introduction of ZnO in CA/ZnO films. 32 By contrasting the IR spectra of CA/ZnO and CA films, it was discovered that all of the characteristic peaks attributed to CA are slightly shifted, which may be related to the hydrogen bonds that exist between ZnO and CA.…”

Section: Resultsmentioning

confidence: 99%

Hierarchically Porous Cellulose-Based Radiative Cooler for Zero-Energy Food Preservation

Zhang

Tang

et al. 2023

ACS Sustainable Chem. Eng.

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Low temperature preservation is an essential route to extend the food shelf life but remains challenging due to its increasing energy consumption and carbon emission, as well as the need for decentralized food preservation. Passive radiative cooling, which can dissipate an object's thermal energy through an atmospheric transparency window to ultracold outer space without consuming any energy, provides a sustainable route for food preservation. Here, a hierarchically porous (0.006−10 μm) cellulose acetate/zinc oxide (CA/ZnO) nanocomposite film is constructebased on water-assisted induced phase separation to achieve passive cooling without any energy input. The film with 30 wt % ZnO concentration achieves subambient temperature cooling through high solar reflectivity (97.0%) and high mid-infrared emissivity (94.0%), achieving a daytime temperature drop of 13.8 °C under strong solar illumination. When used in food packaging, the CA/ZnO film can decrease the temperature of enoki mushrooms by up to 18 °C under direct sunlight. The preservation temperature reduction outperforms other commercially available food packaging materials, which can extend strawberries storage time to 9 days. Meanwhile, the film also demonstrates excellent antimicrobial, self-cleaning, and reusable properties. This energy-free cooling film has great potential in food preservation as well as other applications where a controlled environmental temperature is required.

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Section: Resultsmentioning

confidence: 99%

Hierarchically Porous Cellulose-Based Radiative Cooler for Zero-Energy Food Preservation

Zhang

Tang

et al. 2023

ACS Sustainable Chem. Eng.

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“…The casted membranes were immediately immersed in a coagulation bath for one hour. The resulting flat sheet membranes exhibited a skin layer thickness of about 50 µm [ 27 ]. The precipitated membranes were removed from the coagulation bath and washed with distilled water to eliminate the excess amount of solvent.…”

Section: Methodsmentioning

confidence: 99%

Photocatalytic Degradation of Textile Dye on Blended Cellulose Acetate Membranes

et al. 2022

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This work aimed to investigate the degradation performance of natural cellulose acetate (CA) membranes filled with ZnO nanostructures. Photocatalytic degradation of reactive toxic dye methylene blue (MB) was studied as a model reaction using UV light. A CA membrane was previously casted and fabricated through the phase inversion processes and laboratory-synthesized ZnO microparticles as filler. The prepared membrane was characterized for pore size, ultrafiltration (UF) performance, porosity, morphology using scanning electron micrographs (SEM), water contact angle and catalytic degradation of MB. The prepared membrane shows a significant amount of photocatalytic oxidation under UV. The photocatalytic results under UV-light radiation in CA filled with ZnO nanoparticles (CA/ZnO) demonstrated faster and more efficient MB degradation, resulting in more than 30% of initial concentration. The results also revealed how the CA/ZnO combination effectively improves the membrane’s photocatalytic activity toward methylene blue (MB), showing that the degradation process of dye solutions to UV light is chemically and physically stable and cost-effective. This photocatalytic activity toward MB of the cellulose acetate membranes has the potential to make these membranes serious competitors for removing textile dye and other pollutants from aqueous solutions. Hence, polymer–ZnO composite membranes were considered a valuable and attractive topic in membrane technology.

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“…Ultrafiltration membranes based on CA modified with zinc oxide (ZnO) were prepared [75]. Membrane performance was improved.…”

Section: Additivesmentioning

confidence: 99%

Cellulose Acetate Membrane Preparation for Wastewater Treatment

Ounifi¹,

Khaled²,

Kahloul³

et al. 2023

Cellulose - Fundamentals and Conversion Into Biofuel and Useful Chemicals

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For a long time, humans have used cellulose, as a natural, renewable, and transformative polymer, for scientific development to create new technologies. Cellulose is the most abundant biopolymer on Earth, accounting for more than 50% of terrestrial biomass. For this reason, the treated cellulose (cellulose acetate (CA)) was used in the membrane preparation for water desalination. However, membrane preparation has recently attracted big attention of several research groups. In this case, cellulose acetate (CA), as an inexpensive hydrophilic biopolymer, was chosen as a polymer for preparing the membranes via the inversion phase, since it offers an efficient purification benefit with low energy consumption and less cost. The purpose of this chapter is to describe the various types of membrane preparation based on cellulose acetate, with pathogens, bacteria, and heavy metal (cadmium), and the applications of these membranes in the treatment of contaminated water, to ensure a clean water supply for both human and industrial uses.

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Synthesis and Characterization of Blended Cellulose Acetate Membranes

Cited by 35 publications

References 31 publications

Hierarchically Porous Cellulose-Based Radiative Cooler for Zero-Energy Food Preservation

Hierarchically Porous Cellulose-Based Radiative Cooler for Zero-Energy Food Preservation

Photocatalytic Degradation of Textile Dye on Blended Cellulose Acetate Membranes

Cellulose Acetate Membrane Preparation for Wastewater Treatment

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