Lignin as natural radical scavenger. Effect of the obtaining and purification processes on the antioxidant behaviour of lignin

García, Araceli; Alriols, María González; Spigno, Giorgia; Labidi, Jalel

doi:10.1016/j.bej.2012.06.013

Cited by 126 publications

(65 citation statements)

References 31 publications

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“…Fourier transform infrared spectra of SBL and SKL composite in different content and with and without MAPP are shown in Figure . Some bands assigned to syringyl and guaiacyl units in lignin were detected at 1315, 1260, 1115, and 1040 cm −1 , corresponding to syringyl absorptions, guaiacyl ring breathing, in‐plane deformation in aromatic syringil, and in‐plane deformation in aromatic guaiacyl, respectively . The peak at 1510 cm −1 assigned to aromatic skeletal vibrations was found more intense at higher concentration of lignin .…”

Section: Resultsmentioning

confidence: 96%

“…Some bands assigned to syringyl and guaiacyl units in lignin were detected at 1315, 1260, 1115, and 1040 cm −1 , corresponding to syringyl absorptions, guaiacyl ring breathing, in-plane deformation in aromatic syringil, and in-plane deformation in aromatic guaiacyl, respectively. 43,65,66 The peak at 1510 cm −1 assigned to aromatic skeletal vibrations was found more intense at higher concentration of lignin. 67 Figure 6 showed that lignin reacted with the coupling agent because of the weaker shoulder at 3300 to 3400 cm −1 , which corresponds to OH stretching vibrations in OH groups, and the presence of a new peak at 1710 cm −1 assigned to ester bond formation.…”

Section: Thermogravimetric Analysis (Tga)mentioning

confidence: 97%

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Development of high bio‐content polypropylene composites with different industrial lignins

Dias

Sain

Cesarino

et al. 2018

Polymers for Advanced Techs

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Sustainability, eco‐efficiency, pollution prevention, industrial ecology, and green chemistry are considering platform‐based approaches to the development of the next generation of products and processes. Recently, renewable alternatives to traditional petroleum‐derived plastics have motivated recent interest in bio‐based composite materials which can contribute to the reduction of the environmental footprint. Lignin is a complex and amorphous biopolymer with a high density of functional groups and high modulus, which makes it potentially promising for material applications. In this sense, lignin can potentially be employed to improve the performance of materials and an economical alternative to convert lignin into high value‐added materials. Two different types of Kraft lignin were incorporated into polypropylene to fabricate composites with high bio‐content. In this study, polypropylene, Kraft lignin, and coupling agent were subjected to reactive extrusion. The composites prepared by melt processing were compared in terms of morphological, mechanical, and thermal characterizations. The results revealed that the incorporation of lignin into polypropylene matrix resulted in composites with properties suitable for various industrial sectors, especially those in which mechanical and thermal properties are crucial, such as the replacement of engineering plastics and polypropylene mineral filled. As a result, this work provides an effective way of using lignin as a low‐cost bio‐renewable resource in the plastics industry.

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Section: Resultsmentioning

confidence: 96%

Section: Thermogravimetric Analysis (Tga)mentioning

confidence: 97%

Development of high bio‐content polypropylene composites with different industrial lignins

Dias

Sain

Cesarino

et al. 2018

Polymers for Advanced Techs

View full text Add to dashboard Cite

show abstract

“…There is no difference in curves of both lignins either for kenaf or EFB. [14,16]. The absorption at 1211 cm -1 for kenaf corresponded to C-C and C-O bending vibration of guaiacyl and syringyl.…”

Section: Ir Analysismentioning

confidence: 98%

Purification of empty fruit bunch (EFB) and kenaf soda lignin with acidified water

Hashim¹,

Zakaria²,

Jaafar³

et al. 2014

AIP Conference Proceedings

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Abstract. In this current study, the soda lignins from empty fruit bunch (EFB) and kenaf core were recovered by two step precipitation method. The objective of this research is to study the purity of lignin by washing the lignins with acidified water. The purified lignins were undergone characterization by FT-IR, Uv-Vis and XRD. The FT-IR analysis shows that kenaf core has Guaiacyl(G) and Syringyl(S) unit meanwhile EFB has Hydroxyphenyl(H), Guaiacyl(G) and Syringyl(S) unit of lignin. As for XRD analysis, the non-purified shows that the existence of impurities which is salt (NaCl). The UV analysis shows the higher absorbance which lead to the purity of lignin.

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“…Antioksidan alami banyak terdapat pada tumbuh-tumbuhan baik pada bagian buah, batang, akar dan daun, seperti yang terdapat pada Teucrium polium and Stachys iberica [3] , pohon apel [4] , buah berry [5] , sereal [6] , buah segar [7] , delima [8] , coklat [9] , batang cherry [10] , blueberry [11] , cabe [12] dan banyak lagi tumbuhan lainnya.…”

Section: Pendahuluanunclassified

Validasi Metoda Frap Modifikasi Pada Penentuan Kandungan Antioksidan Total Dalam Sampel Mangga Dan Rambutan

2015

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Validation of modified FRAP method to determine total antioxidant content in mango and rambutan sample have been done. Total antioxidan content in sampel is presented as Gallic Acid Equivalent (GAE). Modified FRAP method using FeCl 3 as oxidizing agent and orthophenantroline as complexan, which produce complex compounds of [Fe (C 12 +2 sorrel coloured. Validation parameters are obtained in this research are r = 0.999, R 2 = 0.998, LoD 3.13 x 10 -6 M and LoQ 1.04 x 10 -5 M. While RSD and recovery in the sample mango and rambutan were 1.15%, 1.34% and 96.31%, 97.72%, respectively. Based on the value of the validation parameters, it can be concluded that this method can be used for determination of total antioxidant content in the mango and rambutan samples.

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Lignin as natural radical scavenger. Effect of the obtaining and purification processes on the antioxidant behaviour of lignin

Cited by 126 publications

References 31 publications

Development of high bio‐content polypropylene composites with different industrial lignins

Development of high bio‐content polypropylene composites with different industrial lignins

Purification of empty fruit bunch (EFB) and kenaf soda lignin with acidified water

Validasi Metoda Frap Modifikasi Pada Penentuan Kandungan Antioksidan Total Dalam Sampel Mangga Dan Rambutan

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