Imidazole-based deep eutectic solvents for starch dissolution and plasticization

Zdanowicz, Magdalena; Spychaj, Tadeusz; Mąka, H.

doi:10.1016/j.carbpol.2015.12.036

Cited by 82 publications

(51 citation statements)

References 34 publications

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“…Finally, the isolated xylans were characterized by FTIR (Figure ), showing that in the case of the samples extracted with aqueous DES, there was some contamination with other polysaccharides, most probably pectin and starch (1112 cm −1 and 998 cm −1 ), both known to be present in E. globulus wood, and prone to solubilization in DES …”

Section: Resultsmentioning

confidence: 99%

“…However, the main challenge is to use these solvents for the fractionation of the major components of lignocellulosic biomass, namely lignin and polysaccharides. A few studies have reported the potential of NADES for lignin dissolution and depolymerization, as well as for polysaccharides dissolution . However, considering that hydrogen bonding is an essential aspect in DES formation, as well as in the solubility and processing behavior of polysaccharides, it might be expected that DES will have the ability to efficiently disrupt the intermolecular hydrogen bonding of polysaccharides, and as a result, promoting their efficient solubilization/processing.…”

Section: Introductionmentioning

confidence: 99%

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Deep Eutectic Solvent Aqueous Solutions as Efficient Media for the Solubilization of Hardwood Xylans

et al. 2018

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This work contributes to the development of integrated lignocellulosic-based biorefineries by the pioneering exploitation of hardwood xylans by solubilization and extraction in deep eutectic solvents (DES). DES formed by choline chloride and urea or acetic acid were initially evaluated as solvents for commercial xylan as a model compound. The effects of temperature, molar ratio, and concentration of the DES aqueous solutions were evaluated and optimized by using a response surface methodology. The results obtained demonstrated the potential of these solvents, with 328.23 g L of xylan solubilization using 66.7 wt % DES in water at 80 °C. Furthermore, xylans could be recovered by precipitation from the DES aqueous media in yields above 90 %. The detailed characterization of the xylans recovered after solubilization in aqueous DES demonstrated that 4-O-methyl groups were eliminated from the 4-O-methylglucuronic acids moieties and uronic acids (15 %) were cleaved from the xylan backbone during this process. The similar M values of both pristine and recovered xylans confirmed the success of the reported procedure. DES recovery in four additional extraction cycles was also demonstrated. Finally, the successful extraction of xylans from Eucalyptus globulus wood by using aqueous solutions of DES was demonstrated.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Deep Eutectic Solvent Aqueous Solutions as Efficient Media for the Solubilization of Hardwood Xylans

et al. 2018

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“…The area of biodegradable material application is continuously extending thanks to their improving properties which in many cases resemble petrochemical polymers. In spite of many studies concerning the usage of biodegradable polymers, such as poly(lactic acid) (PLA) [2][3][4][5][6][7][8][9][10], poly(butylene adipate-co-terephthalate (PBAT) [11][12][13], polypropylene carbonate (PPC) [14][15][16], and starch [17][18][19][20], their commercial application is still not very common. Packaging industry appears as a branch which due to relatively low expectations towards mechanical properties allows for wide application of fully biodegradable polymers on a bigger scale [5].…”

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confidence: 99%

Characterization of poly(lactic acid) biocomposites filled with chestnut shell waste

Barczewski

Matykiewicz

Krygier

et al. 2017

J Mater Cycles Waste Manag

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expansion of petroleum-based polymers. Despite trials of the reducing polymeric waste and strong restrictions concerning storage and product end-life cycle performance, the amount of the non-degradable polymer gradually has become ballast for the environment. Therefore, the endeavor of introducing biodegradable polymers in industrial-scale production gained ground among scientists [1]. The area of biodegradable material application is continuously extending thanks to their improving properties which in many cases resemble petrochemical polymers. In spite of many studies concerning the usage of biodegradable polymers, such as poly(lactic acid) (PLA) [2][3][4][5][6][7][8][9][10], poly(butylene adipate-co-terephthalate (PBAT) [11][12][13], polypropylene carbonate (PPC) [14][15][16], and starch [17][18][19][20], their commercial application is still not very common. Packaging industry appears as a branch which due to relatively low expectations towards mechanical properties allows for wide application of fully biodegradable polymers on a bigger scale [5]. The low thermo-mechanical stability of green composites, next to relatively high price, became their biggest disadvantage in comparison to petroleum-based non-biodegradable polymers [5,13]. Therefore, it is well founded to use recycled thermoplastic biodegradable polymers as a matrix for composites filled with organic and inorganic fillers [7,11].Except for the application of the specially prepared fiberlike natural fillers (e.g., bamboo, kenaf, jute and flax), great attention is placed on incorporation of agricultural waste materials into polymeric matrix [2,[21][22][23][24][25]. Extensive studies showed that presence of the natural fillers in biodegradable polymers may strongly accelerate biodegradation process thanks to faster hydrolysis followed by oxidation of both biopolymer, as well as the filler. Moreover, presence of natural filler increases water absorption, which highly influences biodegradation process of the composites, in comparison to neat polymer. In case of natural composites Abstract The aim of this study was to determine thermal and mechanical properties and applicability of ground chestnut shell waste as a filler for poly(lactic acid) composites. The used amount of filler was ranging from 2.5 to 30 wt%. Spectroscopic analysis of composites and its ingredients was conducted by means of FT-IR method. The mechanical and thermal properties of the composites were determined in the course of static tensile test, Dynstat impact strength test, DMTA analysis, and DSC method. The fractured surface morphology of biocomposites was evaluated by SEM analysis. Incorporation of the filler influenced the overall mechanical properties of the composites characterized by high stiffness and lowered impact resistance. Fabricated composites with different amounts of non-reactive natural waste filler exhibited acceptable mechanical and thermal properties. Therefore, these composites can be used as eco-friendly, biodegradable materials for low-demanding applications.

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“…To overcome these problems, many researchers have done a lot of work to improve the thermal and flexibility of starch/PVA film. Among these works the employing of the plasticizer is the simplest and most effective way …”

Section: Introductionmentioning

confidence: 99%

“…Thus, the main challenge for obtaining high performance starch/PVA film is the finding of high effective plasticizer. Many efforts have been made to explore the plasticizing effect of different kinds of plasticizers on starch/PVA film . Inorganic salts were also used to improve the properties of starch/PVA.…”

Section: Introductionmentioning

confidence: 99%

Synergism Effect of Surfactant and Inorganic Salt on the Properties of Starch/Poly(Vinyl Alcohol) Film

et al. 2018

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The starch/PVA films with the addition of 30 wt.% Ca(NO3)2 and different content of Tween 20 are prepared by solution casting. The effect of Ca(NO3)2 on the crystalline, thermal, and mechanical properties of starch/PVA film is studied by X‐ray diffraction measurement, differential scanning calorimetry and tensile testing, respectively. The effect of Tween 20 on the properties of Ca(NO3)2 doped starch/PVA film is studied. The water sorption properties and the water vapor barrier properties of starch/PVA films are studied. The results shows that Ca(NO3)2 can effectively destroy the crystals of starch and PVA. The Ca(NO3)2 doped starch/PVA film shows a high water sorption rate and low water vapor barrier properties. Tween 20 can increase the water resisting properties and increase the flexibility of Ca(NO3)2 doped starch/PVA film. With the combination of Ca(NO3)2 and Tween 20 the flexible starch/PVA film with a high water resisting ability is obtained.

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Imidazole-based deep eutectic solvents for starch dissolution and plasticization

Cited by 82 publications

References 34 publications

Deep Eutectic Solvent Aqueous Solutions as Efficient Media for the Solubilization of Hardwood Xylans

Deep Eutectic Solvent Aqueous Solutions as Efficient Media for the Solubilization of Hardwood Xylans

Characterization of poly(lactic acid) biocomposites filled with chestnut shell waste

Synergism Effect of Surfactant and Inorganic Salt on the Properties of Starch/Poly(Vinyl Alcohol) Film

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