Thermal degradation behavior of cellulose fibers partially esterified with some long chain organic acids

Jandura, Peter; Riedl, Bernard; Kokta, B. V.

doi:10.1016/s0141-3910(00)00132-4

Cited by 166 publications

(97 citation statements)

References 19 publications

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“…5(a). Second, the degradation step at high temperature seen around 353.58 °C for raw coir (a), 333.89 °C for 10% coir-oleate (b), 335 °C for 20% coir-oleate (c), and 348 °C for 30% coir-oleate (d) is attributed to the raw polymer backbone and more the rigid component such as lignin (Jandura et al 2000). …”

Section: Thermal Analysismentioning

confidence: 99%

Esterified Coconut Coir by Fatty Acid Chloride as Biosorbent in Oil Spill Removal

Yusof¹,

Mukhair²,

Malek³

et al. 2015

BioResources

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aCoconut coir, an agricultural waste, was chemically modified using esterification by fatty acid chloride (oleoyl chloride and octanoate chloride) for oil spill removal purposes. The modified coir (coir-oleate and coir-octanoate) were characterized by spectroscopy, thermal studies, contact angle, and morphological studies. The modified coir exhibited an enhancement towards the hydrophobic property but a decreased thermal stability. The oil adsorption performance was tested using a batch adsorption system. The effect of sorbent dosage, oil concentration, and effect of adsorption time on the adsorption capacity of the modified coir were also studied. From the analysis, the long chain oleoyl chloride (C18) was shown to be a better modifier compared to octanoate chloride (C8). The isotherm study indicated that the oil adsorption fitted well to a Langmuir model rather than Freundlich model. From the kinetic study, the result revealed a good fit in pseudo-second order model for all samples studied. The study therefore suggests that esterified coconut coir can serve as a potential biomaterial for the adsorption of spilled oil during operational failures.

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Section: Thermal Analysismentioning

confidence: 99%

Esterified Coconut Coir by Fatty Acid Chloride as Biosorbent in Oil Spill Removal

Yusof¹,

Mukhair²,

Malek³

et al. 2015

BioResources

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“…The thermal properties of cellulose esters were important from both practical and academic points of view. The glass transition temperatures and the melting points of cellulose esters have been investigated extensively [15][16][17]. The thermal stability of cellulose and short-chain cellulose esters have been studied [18].…”

Section: Introductionmentioning

confidence: 99%

“…The thermal stability of cellulose and short-chain cellulose esters have been studied [18]. The thermal degradation kinetic of non-fatty cellulose esters and partially esterified cellulose with long chain fatty acids were discussed by Jandura et al [17] and Sairam et al [19]. However, thermal stability and thermal degradation kinetics of cellulose tri-stearate (CTs) have not been reported.…”

Section: Introductionmentioning

confidence: 99%

Thermal Properties and Thermal Degradation of Cellulose Tri-Stearate (CTs)

Huang

2012

Polymers

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Cellulose tri-stearate (CTs) was synthesized employing trifluoroacetic anhydride (TFAA), stearic acid (SA), with microcrystal cellulose (MCC) and characterized with FT-IR and 1 H-NMR. The degree of substitution of CTs was determined by the traditional saponification method and 1 H-NMR. The thermal properties of CTs were investigated by the thermogravimetric analysis (TGA) under Ar flow in dynamic heating conditions. Thermal stability, activation energy, as well as the degradation mechanism of the decomposition process were revealed. The results showed that the thermal stability of CTs is superior to that of raw materials-MCC, and that the degradation of CTs in argon is a first-order weight loss; the initial decomposition temperature and the temperature corresponding to maximum degradation rate (T p ) increase with an increase in heating rate. The activation energy values were calculated with the Ozawa method, Coats-Redfern method and Kinssinger method, respectively. Analyses of experimental results suggest that the degradation mechanism 0.10 < α < 0.80 is F2 type, A3 for α < 0.1, and R3 for α > 0.80. The degradation mechanism of CTs in the whole conversion range is a complex mechanism, and is the combination of A3, F2 and R3.

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“…In addition, our interest in biopolymers was their intriguing mechanism of thermal degradation. The cellulose and cellulose-related compounds are degraded thermally in air at temperatures around 200°C; yielding acetic acid as by-products [13][14][15]. This information inspired us to investigate the potential of cellulose compounds as thermal degradable additives to promote the selfdegradation of temporary cementitious sealing materials at temperatures ≥ 200°C after water has penetrated through the sealer.…”

Section: Introductionmentioning

confidence: 99%

Self-degradable Cementitious Sealing Materials

Sugama¹

2010

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A self-degradable alkali-activated cementitious material consisting of a sodium silicate activator, slag, Class C fly ash, and sodium carboxymethyl cellulose (CMC) additive was formulated as one dry mix component, and we evaluated its potential in laboratory for use as a temporary sealing material for Enhanced Geothermal System (EGS) wells. The self-degradation of alkali-activated cementitious material (AACM) occurred, when AACM heated at temperatures of ≥ 200°C came in contact with water. We interpreted the mechanism of this water-initiated self-degradation as resulting from the in-situ exothermic reactions between the reactants yielded from the dissolution of the nonreacted or partially reacted sodium silicate activator and the thermal degradation of the CMC. The magnitude of self-degradation depended on the CMC content; its effective content in promoting degradation was ≥ 0.7 %. In contrast, no self-degradation was

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Thermal degradation behavior of cellulose fibers partially esterified with some long chain organic acids

Cited by 166 publications

References 19 publications

Esterified Coconut Coir by Fatty Acid Chloride as Biosorbent in Oil Spill Removal

Esterified Coconut Coir by Fatty Acid Chloride as Biosorbent in Oil Spill Removal

Thermal Properties and Thermal Degradation of Cellulose Tri-Stearate (CTs)

Self-degradable Cementitious Sealing Materials

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