Liquefied agricultural residues for film elaboration

Briones, Rodrigo; Torres, Layla; Saravia, Yanina; Serrano, Luís; Labidi, Jalel

doi:10.1016/j.indcrop.2015.10.021

Cited by 23 publications

(19 citation statements)

References 27 publications

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“…Similar results with glycerol used as plasticizer were obtained by Schmitt et al 26 . Also, this situation could be ascribed to the heterogeneous nature of liquefied derivatives from corn residue liquefaction that was found in an earlier study 15 . Taking into consideration the chemical constitution of the corn husks, the higher cellulose and hemicellulose content and the lower lignin content could be directly related to the higher homogeneity of the sheet samples.…”

Section: Resultssupporting

confidence: 84%

“…Table 1 presents the liquefied sample properties. Comparing the results obtained herein and the published data from the literature using different types of raw material for the liquefaction process, our I OH value of 310 mg KOH g −1 was lower than those of materials prepared from corn residues using similar experimental conditions 15 (biomass, corn stover and corncob; biomass/liquefying solvent ratio, 0.25 (w/v); PEG400:G:SA weight ratio, 80:20:3; reaction temperature, 180°C; reaction time, 60 min; I OH , 342-441 mg KOH g −1 ). This could be attributed to the presence of PEG400 in the liquefying solvent, having high hydroxyl group content.…”

Section: Characteristics Of Liquefied Productssupporting

confidence: 78%

“…The initial liquefaction conditions (G:SA weight ratio, 100:3; reaction temperature, 180°C; reaction time, 60 min; mass/liquefying solvent ratio, 0.25 (w/v)) for the tests were selected by considering the results obtained in the recent work by our group. 15 For evaluating the possibilities of glycerol liquefaction of corn husks into a liquid form, the effect of liquefaction temperature and time ( Fig. 1) was initially investigated.…”

Section: Resultsmentioning

confidence: 99%

“…The widespread glycerol demand has reached a level such that the cost has been considerably reduced. 14 In previous work, 15 our research group has successfully demonstrated the potential of several liquefied agricultural residues (biopolyols), in order to prepare uniform, opaque and obscure ductile films by casting method with appropriate thermal and mechanical characteristics. The promising results acquired in this study are related to the utilization of biopolyols for film formulation and the properties promote the research of pioneer low-cost biobased composites for agrarian activities, which could be a promising alternative to petroleum-based materials.…”

Section: Introductionmentioning

confidence: 99%

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Liquefaction of corn husks and properties of biodegradable biopolyol blends

Briones¹,

Rodríguez²,

Labidi

et al. 2020

J of Chemical Tech & Biotech

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BACKGROUND: A valorization route of corn husks from agrarian practices was performed by liquefaction using glycerol as liquefaction solvent to obtain biopolyols used as bioadditives in starch blends with the aim to find a useful industrial application in polymer processing. RESULTS: Low-molecular-weight liquefied products obtained from a practically total conversion reaction can be used for composite formulations (OH number, 310 mg KOH g −1 ; viscosity, 3.4 Pa s; molecular weight, 549 g mol −1). Concurrently, starch thermoplastic blends using various proportions of biopolyol (40, 30 and 20 wt%) as plasticizer were produced with maximum torque and plasticization energy ranging from 3.4 to 15.1 Nm and from 1.7 to 9.1 Nm min −1. The starch/biopolyol (70/30) sheets obtained by thermopressing showed properties similar to those of controls (starch/glycerol: 70/30), such as sensitivity to environment, retrodegradation, biodegradability and density; however, mechanical properties exhibited better performance compared to controls (Young's modulus, 14 MPa; strain at break, 33%; tensile strength, 1.2 MPa), which indicates a material with major mechanical balance. CONCLUSIONS: The adequacy in the conversion of corn husks into biopolyols that could be used as improved biobased plasticizers to obtain biodegradable blends is revealed. Hence, this study demonstrates that liquefied corn husk residues are sustainable resources with suitable properties for polymer processing, which can be applied in bioplastics and be considered as a value-added feature.

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Section: Resultssupporting

confidence: 84%

Section: Characteristics Of Liquefied Productssupporting

confidence: 78%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Liquefaction of corn husks and properties of biodegradable biopolyol blends

Briones¹,

Rodríguez²,

Labidi

et al. 2020

J of Chemical Tech & Biotech

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“…The liquefaction reaction was carried out following the method previously described by Briones et al, (2015) 16 with some modifications. Liquefaction conditions were: reaction time, 60 min; reaction temperature, 180°C; weight ratio G:SA (glycerol: H 2 SO4), 97:3.…”

Section: Methodsmentioning

confidence: 99%

Insulating rigid polyurethane foams from laurel tree pruning based polyol

Rincón

Balu

Luque

et al. 2020

J of Applied Polymer Sci

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The present work deals with the production of a natural polyol from laurel tree pruning waste, aiming the preparation of polyurethane foams. The obtained bio-polyol was characterized and applied into foams studying the influence of the isocyanate used and the addition of the physical blowing agent. The incorporation of the polyol allowed 40% polyol substitution for those foams in which TDI was used, and up to 60% using MDI. Apparent density, cell morphology, mechanical, and thermal properties were evaluated. Mechanical and thermal properties of the foams improve to a greater amount of polyol in the matrix. Specifically, the best thermal and mechanical properties (274.99 and 7275.91 kPa for compressive strength and Young Modulus, respectively) were obtained with 50% polyol substitution (0.63 R NCO/OH). Foams showed small, well-defined cell morphology. Laurel derived polyol can be used for the preparation of foams using MDI, since the mechanical, and thermal properties are promising for obtaining insulation materials in the construction industry.

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