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

(2 citation statements)

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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%

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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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Section: Introductionmentioning

confidence: 99%