Anti-deterioration Effect of Lignin as an Ultraviolet Absorbent in Polypropylene and Polyethylene

Toh, Kazuko; Nakano, Satoshi; Yokoyama, Hidekatsu; Ebe, Kenichi; Gotoh, Kiichi; Noda, Hiroyuki

doi:10.1295/polymj.37.633

Cited by 37 publications

(21 citation statements)

References 7 publications

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“…It was not possible to calculate the loss of elongation, because elongations higher than 24% were not measured by this method and the initial values in all samples have fallen on this condition. The used concentration of lignin did not affect the mechanical properties, as observed previously by other authors using a concentration of 0.1 wt % …”

Section: Resultssupporting

confidence: 84%

Lignin as a green primary antioxidant for polypropylene

Gadioli

Waldman

Paoli

2016

J of Applied Polymer Sci

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Lignin and Irganox 1010, a hindered phenol antioxidant, are compared as a primary stabilizer in formulations for polypropylene (PP) by exposition to accelerated aging. The concentration of lignin was adjusted to match the concentration of hindered phenolic groups of the commercial stabilizer. Upon aging, lignin formulation retains the initial mechanical properties longer than the formulation with Irganox 1010. The ratio of the areas of the carbonyl and the hydroxyl infrared absorption bands is proposed as a method to evaluate the photodegradation process. In this aspect, the formulation with lignin also presents better results than the formulation with Irganox 1010. There are two hypotheses for the best performance of lignin in the studied conditions: lower leaching of lignin, due to its crosslinked nature, and leaching of low molar mass products of Irganox 1010 hydrolysis. These results indicate lignin, from the Kraft process of Eucalyptus wood, as a promising green substituent to synthetic hindered phenol stabilizers. V C 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43558.

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Section: Resultssupporting

confidence: 84%

Lignin as a green primary antioxidant for polypropylene

Gadioli

Waldman

Paoli

2016

J of Applied Polymer Sci

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“…Due to their aromatic structure and the occurrence of phenol residues, lignins have multiple functionalities, being able to act as compatibilizers [5], plasticizers [6], hydrophobizing agents [7,8], flame retardants [9] or optical modifiers [10] or stabilizers [11]. Furthermore, properties potentially interesting in high value applications, such as antimicrobial activity [12] or cytotoxic effects [13] have been shown.…”

Section: Introductionmentioning

confidence: 99%

Potential of Lignins as Antioxidant Additive in Active Biodegradable Packaging Materials

et al. 2013

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is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible. Abstract Due to their polyphenolic structure lignins bear a number of interesting functional properties, such as antioxidant activity. Natural antioxidants are very much looked for in the aim of protection of light or oxygen sensitive goods and are being used in active packaging. Poly(lactide) (PLA)-lignin films were prepared by twin screw extrusion followed by thermo-compression using two different commercial sources of alkali lignins obtained from gramineous plants. A good dispersion of lignin in the matrix was observed. Mechanical properties of the compounded material were merely diminished and oxygen barrier properties slightly enhanced. The chromatographic study of the lignins revealed that the low molecular weight fraction of both lignins increased during the polymer processing. The migration of low molecular weight compounds in an ethanol/water solution simulating fatty foodstuff was performed and the antioxidant activity of the extract was analysed. It was found that the activity increases with increasing severity of the heat treatment because of the generation of free phenolic monomers during processing. These results open an interesting way for application of lignins as an active compound in packaging materials. Lignins do not impair the mechanical and barrier performance of the polymer and the plastics processing even allows for the generation of active substances.

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“…Waste wood biomass in form of saw dust can serve as the source of greenhouse free ethanol fuel as a good alternative to petroleum products whose cost of production is higher and also pollutes the air as it burns with smoky flames as well as a good alternative to ethanol produced from starchy Agricultural food stuffs which has been competing with man's food availability [61][62][63][64][65].…”

Section: Resultsmentioning

confidence: 99%

Significance of Ethanol Product of Gmelina arborea

Afe¹

2017

Forest Res

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This work covers the process of making Ethanol from wood dust instead of starchy biomass which could be meant for food or instead of overdependence on hydrocarbon source. The saw dust of Gmelina arborea was collected in a saw mill in Ore, Ondo State, Nigeria and it was used to produce ethanol by hydrolysis and fermentation processes. The density of the wood species was 570 kg/m 3 . The ionic constituents of the ethanol from the wood biomass were analyzed using Fourier Transform Infrared Spectrometric Analyzer (FTIR) and Atomic Absorption Spectrometric Analyzer (AAS). The AAS result shows that the ethanol obtained from the wood species contains transition metals like Copper (Cu), Zinc (Zn), Cadmium (Cd) and Chromium (Cr) while the FTIR results show the presence of ethanol functional groups such as OH, Carbon to carbon single covalent bond which and these are normal components of ethanol in the conventional ethanol.

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Anti-deterioration Effect of Lignin as an Ultraviolet Absorbent in Polypropylene and Polyethylene

Cited by 37 publications

References 7 publications

Lignin as a green primary antioxidant for polypropylene

Lignin as a green primary antioxidant for polypropylene

Potential of Lignins as Antioxidant Additive in Active Biodegradable Packaging Materials

Significance of Ethanol Product of Gmelina arborea

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