Non-isothermal pyrolysis of pectin: A thermochemical and kinetic approach

Aburto, Jorge; Morán, Miguel Ángel Montes; Galano, Annia; Torres-Garcı́a, E.

doi:10.1016/j.jaap.2015.02.012

Cited by 138 publications

(65 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In particular, the dehydration is reflected in the drastic increase of FTIR transmittance bands centered at 3300 cm −1 , which correspond to the stretching frequencies of hydroxyl groups (OH) originated from water molecules. Coincidently, dehydration at temperatures below 100 °C is also in agreement with the thermal analysis results of other biopolymers, including chitosan and pectin . Notice that FTIR transmittance band at 1303 cm −1 , which corresponds to the vibrational frequency of glycosidic linkages (COC) connecting the monosaccharide rings, is increased when the polysaccharides film was dried at 200 °C.…”

Section: Resultssupporting

confidence: 86%

Nonvolatile Memory Device Based on Bipolar and Unipolar Resistive Switching in Bio‐Organic Aloe Polysaccharides Thin Film

Lim

Cheong

2018

Adv Materials Technologies

View full text Add to dashboard Cite

To enable long-term progress, next-generation nonvolatile memories should function on the basis of new concepts that are different from the conventional charge storage in floating-gate transistors. [4][5][6] Of the emerging storage principles, electrically modulated resistive switching behaviors in metal-insulator-metal (MIM) structures could be an intriguing concept to redefine the frontiers of next-generation nonvolatile memories. [7][8][9][10][11][12][13][14] Such implementation offers promising advantages in several key aspects, including down-scalability, switching speed, power consumption, and fabrication cost.Resistive switching has been demonstrated in a wide variety of inorganic [7][8][9][10] and organic [11][12][13][14] materials, which are generally deposited as a continuous thin film sandwiched in between two conductive electrodes forming a MIM structure. However, careful consideration should be taken during the fabrication process, because deposition of these materials using various power-demanding methods (e.g., thermal evaporation, molecular beam epitaxy, and chemical vapor deposition) could possibly lead to an energy-imbalance situation. [15] Furthermore, utilization of materials derived from nonrenewable resources (e.g., mined minerals and fossil fuels) could raise critical issue regarding sustainability. In general, these materials are chemically robust and thus require an infinitely long period for natural decomposition after disposal, leaving behind massive volumes of electronic waste overwhelming landfills around the world. [16] In tandem with the growing environmental awareness and the proliferation of disposable electronics, there is an urgent need to develop more electronic applications based on the greener bio-organic materials, [16,17] which are generally derived from living (or once-living) organisms that are abundant in the nature. Bio-organic materials are not only biodegradable, biocompatible, and environmentally benign to provide a sustainable solution in addressing the environmental concerns, but also exotic for next-generation electronics realization. Recently, resistive switching behaviors demonstrated in several bio-organic MIM structures (Table S1, Supporting Information) have garnered considerable attention owing to their potentials as a plausible alternative for next-generation nonvolatile memories.Growing environmental awareness has prompted a paradigm shift toward using green materials for various electronic applications. Bio-organic materials are promising candidates attributable to their inherent biocompatibility, biodegradability, and environmental friendliness. Here, a nonvolatile memory device based on resistive switching in a bio-organic polysaccharides film is presented. The polysaccharides are extracted from natural Aloe vera gel using facile alcohol precipitation. Optimal film deposition is achieved through spin-coating followed by drying at 120 °C, which is higher than the usual processing temperature of commercial Aloe vera gel. Both bipolar and unipolar resistiv...

show abstract

Section: Resultssupporting

confidence: 86%

Nonvolatile Memory Device Based on Bipolar and Unipolar Resistive Switching in Bio‐Organic Aloe Polysaccharides Thin Film

Lim

Cheong

2018

Adv Materials Technologies

View full text Add to dashboard Cite

show abstract

“…The asymmetric stretching vibration of C=O of galacturonic acid was confirmed by the presence of signals at 1640–1660 cm −1 . The band at around 1600 cm −1 was attributed to carboxylate groups –C(=O)–O– (Aburto et al ., ). Finally, the signals at 1031 cm −1 , 2930 cm −1 and 1410 cm −1 were attributed, respectively, to the stretching vibration of C–O bonds, the stretching vibration of C–H, the symmetric stretching vibration of COO − of galacturonic acid and the stretching vibration of C–O within COOH (Zhao et al ., ).…”

Section: Resultsmentioning

confidence: 97%

Effect of extraction conditions on the antioxidant and antiglycation capacity of carbohydrates from Opuntia robusta cladodes

Chaouch

Hafsa

Rihouey

et al. 2016

Int J of Food Sci Tech

View full text Add to dashboard Cite

The extraction and characterisation of six crude polysaccharides from Opuntia robusta cladodes, as well as the assessment of their antioxidant and antiglycation activities in vitro, were examined. In this work, carbohydrates were extracted from defatted cladode's peels and pulps through a sequential extraction method in different aqueous medium (neutral, basic and chelating). The obtained polysaccharides were compared in terms of yield and physicochemical properties. Water-soluble extracts showed the highest yield, while peel's chelating-soluble extract gave high galacturonic acid content. Preliminary antioxidant in vitro tests suggested that peel's chelating-soluble extract presented the highest scavenging activity towards DPPH free radicals and inhibition of linoleic acid peroxidation. Furthermore, all extracted polysaccharides showed good potential in inhibiting the nonenzymatic glycation reaction, particularly on the first 3 days of incubation. The obtained results suggested that Opuntia robusta extracts could be explored as natural antioxidant, especially those extracted with chelating agent.

show abstract

“…Thermal weight loss of PPW is the combined decomposition of its main components: Potato starch thermal degradation occurs mainly at 280-350°C and undergoes gradual decomposition over a wide temperature range (Guinesi et al 2006); pectin substances decompose between 180 and 580°C, being the major weight loss registered around 240°C (Aburto et al 2015); cellulose decomposes mainly between 315 and 400°C, hemicelluloses in the range of 220-315°C and lignin for a wide temperature range of 160-900°C (Yang et al 2007).…”

Section: Resultsmentioning

confidence: 99%

High efficacy on diclofenac removal by activated carbon produced from potato peel waste

Bernardo

Rodrigues

Lapa

et al. 2016

Int. J. Environ. Sci. Technol.

View full text Add to dashboard Cite

In the present study, a novel porous carbon obtained by K 2 CO 3 activation of potato peel waste under optimized conditions was applied for the first time as liquid-phase adsorbent of sodium diclofenac in parallel with a commercial activated carbon. The biomass-activated carbon presented an apparent surface area of 866 m 2 g -1 and well-developed microporous structure with a large amount of ultramicropores. The obtained carbon presented leaching and ecotoxicological properties compatible with its safe application to aqueous medium. Kinetic data of laboratorymade and commercial sample were best fitted by the pseudo-second-order model. The commercial carbon presented higher uptake of diclofenac, but the biomass carbon presented the higher adsorption rate which was associated with its higher hydrophilic nature which favoured external mass transfer. Both adsorbents presented adsorption isotherms that were best fitted by Langmuir model. The biomass carbon and the commercial carbon presented adsorption monolayer capacities of 69 and 146 mg g -1 , and Langmuir constants of 0.38 and 1.02 L mg -1 , respectively. The better performance of the commercial sample was related to its slightly higher micropore volume, but the most remarkable effect was the competition of water molecules in the biomass carbon.

show abstract

Non-isothermal pyrolysis of pectin: A thermochemical and kinetic approach

Cited by 138 publications

References 41 publications

Nonvolatile Memory Device Based on Bipolar and Unipolar Resistive Switching in Bio‐Organic Aloe Polysaccharides Thin Film

Nonvolatile Memory Device Based on Bipolar and Unipolar Resistive Switching in Bio‐Organic Aloe Polysaccharides Thin Film

Effect of extraction conditions on the antioxidant and antiglycation capacity of carbohydrates from Opuntia robusta cladodes

High efficacy on diclofenac removal by activated carbon produced from potato peel waste

Contact Info

Product

Resources

About