Materials from renewable resources: new properties and functions

Galembeck, Fernando; Burgo, Thiago A. L.; Silva, Douglas Soares da; Santos, Leandra P.

doi:10.1590/0001-3765201920181160

Cited by 5 publications

(3 citation statements)

References 54 publications

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“…The current trend of developing new materials from renewable resources exhibits an alternative sources to petroleum and environmental concern in the materials science and technology fields [1,2]. MCC-based polymer composites have drawn a lot of concern due to their several advantages, such as low cost, availability, light weight, interesting mechanical properties, and nontoxic properties [3].…”

Section: Introductionmentioning

confidence: 99%

Heterogeneous photocatalytic degradation of anionic dye on polyaniline/microcrystalline cellulose composite

et al. 2022

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The development of novel polymeric composites, especially those based on conductive polymers has attracted a consider-able attention due to their applications in a wide range of fields. This study focuses on one of these biocomposites based on polyaniline Pani and a biopolymer (microcrystalline cellulose MCC), synthesized by in-situ polymerization of aniline using ammonium persulfate (APS) as oxidant at room temperature. Firstly, different amounts of MCC were dispersed in HCl solu-tion with aniline monomer under stirring. Then a mixture of APS/HCl solution was introduced into the first aniline-MCC-HCl mixture. The obtained materials as well as Pani and MCC were characterized using powder X-ray diffraction (XRD), Argon adsorption-desorption (BET/DFT), thermal analysis, fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Thus, a correlation between interesting structural/textural/morphological data of these materials will be established. The results confirm the formation of Polyaniline-MCC composite under well determined conditions which has a more compact homogeneous morphology and a higher thermal stability than those of Pani and MCC. Furthermore, these materials are used for the catalytic degradation of toxic anionic dye namely Methyl Orange (MO) from aqueous media under UV light irradiation. The optimum values were 0.1 g L − 1 of photocatalyst, 30 ppm of MO solution, and pH solution of 5.6, which allowed reaching 97% within 70 min with high stability after four continuous runs. The photodegradation kinetics of MO onto composite followed the pseudo-first order model.

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Section: Introductionmentioning

confidence: 99%

Heterogeneous photocatalytic degradation of anionic dye on polyaniline/microcrystalline cellulose composite

et al. 2022

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“…Awareness of the current environmental problems also influences the development of more environmentally friendly nanomaterials. The utilization of biological resources, as an alternative to the synthetic nanomaterials, such as cellulose, is getting more attention since it is renewable and less expensive to produced [3]. Cellulose is one of the naturally occurred polymers which can be found in nature.…”

Section: Introductionmentioning

confidence: 99%

“…Some research on the NCC grows in recent years because of the nature of cellulose, which is abundant, renewable, and biodegradable, as a biobased polymer to develop a "greener" nanomaterial [7], [9]. The NCC has a relatively low density (1.59 g/cm 3 ) and has experimental strength and modulus of 7.5 GPa and 150 GPa, respectively [11], [12]. It also has a low thermal expansion [5], biocompatibility, and low toxicity [6].…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Nanocrystalline Cellulose from Cladophora sp. Algae

Steven¹,

Mardiyati²,

Shoimah³

et al. 2021

Int. J. Adv. Sci. Eng. Inf. Technol.

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Nanomaterial is one of the recent technological advancements that attracts the attention of many scientists. Many advanced properties could emerge from the utilization of materials on this scale. Nanocrystalline cellulose (NCC) is a cellulose-based nanomaterial currently gaining attention because of its remarkable properties. NCC was prepared by removing the amorphous part of cellulose through acid hydrolysis. Cladophora is a type of algae with a fiber-like body, that could grow rapidly and widely available in the Indonesian coastal area, which is considered a nuisance and has no known high economic value. Cladophora can be used as an alternative source of cellulose because it has a high amount of cellulose. Cellulose could be extracted from Cladophora using 17.5% of NaOH at 100°C, 1 M sulfuric acid hydrolysis at 100°C, and bleaching with 5% hydrogen peroxide at 100°C. Nanocrystalline cellulose could be extracted by sulfuric acid hydrolysis at 100°C, with a concentration of 2 M, 3 M, and 5 M. The duration of the process for each concentration, varied for 5, 10, and 15 hours. X-Ray Diffraction (XRD), Particle Size Analyzer (PSA), Transmission Electron Microscopy (TEM), and Fourier Transform Infrared (FTIR) spectroscopy were used to characterize the resulting hydrolyzed product. The result showed that the increase in acid concentration and processing duration increased the crystallinity while decreased particle length and cellulose diameter. The highest crystallinity and smallest particle size were 96.36% and 189.2 nm, obtained by acid hydrolysis in 5 M sulfuric acid for 15 hours.

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Mechanosynthezized Zn3V2O8 Mixed Oxide as Efficient Catalyst of Xylose Conversion to Glycolic Acid in Water

et al. 2022

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Materials from renewable resources: new properties and functions

Cited by 5 publications

References 54 publications

Heterogeneous photocatalytic degradation of anionic dye on polyaniline/microcrystalline cellulose composite

Heterogeneous photocatalytic degradation of anionic dye on polyaniline/microcrystalline cellulose composite

Preparation and Characterization of Nanocrystalline Cellulose from Cladophora sp. Algae

Mechanosynthezized Zn3V2O8 Mixed Oxide as Efficient Catalyst of Xylose Conversion to Glycolic Acid in Water

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