Kraft lignin as filler in PLA to improve ductility and thermal properties

Gordobil, Oihana; Delucis, Rafael de Ávila; Egüés, Itziar; Labidi, Jalel

doi:10.1016/j.indcrop.2015.01.055

Cited by 243 publications

(205 citation statements)

References 49 publications

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“…Figure 5 shows the FTIR spectra of lignin-containing polyurethanes (varying the TKL wt% into the polyurethanes) and of TKL (Figure 5b, 5d and 5f). The band at 3425 cm -1 , TKL spectrum (Figure 5b, 5d and 5f), is characteristic of its aromatic and aliphatic OH bond stretching [15,28,29]. The presence of lignin in polyurethane resulted into the formation of a wider band in the 3330-3425 cm -1 region due to merging of the bonded NH band (3330 cm As can be seen in Figures 5a, 5c and 5e the spectra of lignin-containing polyurethanes show that as the lignin content increases, the peak of the carbonyl stretching vibration (around 1700 cm -1 ) gradually shifted to higher wavenumbers.…”

Section: Scanning Electron Microscopy (Sem)mentioning

confidence: 99%

“…Unmodified lignin has poor stability [13] and difficult melt processing [14], which make its direct use uncompetitive. However, many studies have focused on the incorporation of lignin in polymer materials by blending it with synthetic or other biobased polymers [15][16][17]. Current studies have shown increasing interest in diversifying the sources of the hydroxyl groups.…”

Section: Introductionmentioning

confidence: 99%

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Bio-based polyurethane prepared from Kraft lignin and modified castor oil

Tavares¹,

Boas²,

Schleder³

et al. 2016

Express Polym. Lett.

117

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Abstract. Current challenges highlight the need for polymer research using renewable natural sources as a substitute for petroleum-based polymers. The use of polyols obtained from renewable sources combined with the reuse of industrial residues such as lignin is an important agent in this process. Different compositions of polyurethane-type materials were prepared by combining technical Kraft lignin (TKL) with castor oil (CO) or modified castor oil (MCO1 and MCO2) to increase their reactivity towards diphenylmethane diisocyanate (MDI). The results indicate that lignin increases the glass transition temperature, the crosslinking density and improves the ultimate stress especially for those prepared from MCO2 and 30% lignin content from 8.2 MPa (lignin free) to 23.5 MPa. Scanning electron microscopy (SEM) micrographs of rupture surface after uniaxial tensile tests show ductile-to-brittle transition. The results show the possibility to develop polyurethane-type materials, varying technical grade Kraft lignin content, which cover a wide range of mechanical properties (from large elastic/low Young modulus to brittle/high Young modulus polyurethanes).

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Section: Scanning Electron Microscopy (Sem)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Bio-based polyurethane prepared from Kraft lignin and modified castor oil

Tavares¹,

Boas²,

Schleder³

et al. 2016

Express Polym. Lett.

117

View full text Add to dashboard Cite

show abstract

“…Most of the attempts proved the antioxidant effect of lignin. The antioxidant and stabilizing characteristics of lignin have been studied in several polymers, but mainly in PE [153][154][155][156], PP [153,[157][158][159][160][161][162][163][164], PLA [165,166], poly(3-hydroxybutyrate) (PHB) [167], PCL [168] and in natural rubber [169,170].…”

Section: Application In Polymersmentioning

confidence: 99%

Natural antioxidants as stabilizers for polymers

Kirschweng

Tátraaljai

Földes

et al. 2017

Polymer Degradation and Stability

165

126

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“…Sedangkan tingginya stabilitas termal lignin disebabkan oleh hadirnya unit phenylpropanoid kompleks yang mengandung gugus phenyl aromatik. Struktur aromatik ini sangat stabil terutama disebabkan oleh overlap p-orbitals yang memungkinkan delokalisasi π electrons 14 . Selain itu, kehadiran beberapa gugus hidroksil juga berkontribusi terhadap stabilitas struktur aromatik yang berada dalam struktur lignin 14 .…”

Section: Hasil Dan Pembahasanunclassified

Pengaruh Penambahan Lignin Terhadap Stabilitas Termal Biokomposit Poliasam Laktat / Lignin

Ghozali¹,

Irawan²,

Waskitoaji³

2018

J. Penelit Pascapanen Pertan

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ABSTRAKBiomassa merupakan sumber daya alam terbarukan yang ketersediaanya sangat melimpah di Indonesia yang memiliki potensi besar untuk dikembangkan sebagai polimer biodegradabel terbarukan. Poliasam laktat atau polylactic acid (PLA) dan lignin merupakan material polimer biodegradabel yang secara ekonomi memiliki potensi yang sangat besar untuk dikembangkan. Penelitian ini bertujuan untuk mempelajari pengaruh penambahan lignin terhadap stabilitas termal biokomposit PLA/Lignin. Pembuatan biokomposit PLA/ Lignin dilakukan dengan cara mencampurkan PLA dengan lignin dalam rheomix dengan suhu 200ºC, kecepatan pengadukan 70 rpm selama 30 menit. Komposisi lignin yang ditambahkan adalah 5, 10, 15 dan 20 phr. Analisis menggunakan Fourier Transform Infra Red (FTIR) dilakukan untuk menentukan gugus fungsi biokomposit PLA/Lignin. Stabilitas termal biokomposit PLA/Lignin dipelajari menggunakan Termogravimetric Analysis (TGA). Hasil analisa stabilitas termal menunjukkan degradasi termal utama biokomposit PLA/Lignin pada berbagai komposisi terjadi pada rentang suhu 230-360°C. Penambahan lignin ke dalam biokomposit PLA/Lignin akan meningkatkan massa tersisa sehingga dapat meningkatkan stabilitas termal biokomposit PLA/Lignin tersebut. Meningkatnya massa yang tersisa ini disebabkan oleh struktur kimia lignin, yang menunjukkan kurang berkontribusi terhadap kemampuan terbakar material yang disebabkan karena tingginya kemampuan menjadi arang dan rendahnya pelepasan panas ketika dibakar, sehingga sangat berpotensi digunakan sebagai flame retardant untuk berbagai aplikasi. Biomass is a highly abundant renewable natural resource available in Indonesia that holds great potential to be developed as a renewable biodegradable polymer. Polylactic acid (PLA) and lignin are among of those biodegradable polymer materials with a great potential of economic value to be developed. This research is purposed to study the effect of lignin addition on thermal stability of PLA/Lignin biocomposites. PLA/Lignin biocomposites has been manufactured by mixing PLA and lignin into rheomix at a temperature of 200°C with a stirring speed of 70 rpm for 30 minutes. The composition of lignin added was 5, 10, 15 and 20 phr. Fourier Transform Infra-Red (FTIR) spectrum analysis was conducted to determine the functional groups of PLA/Lignin biocomposites.The thermal stability was analyzed by termogravimetric analysis (TGA) and the results showed that the main thermal degradation occurred in temperature range of 230-360°C. The addition of lignin into PLA/Lignin biocomposites could increase residual mass which improves the thermal stability of PLA/Lignin bicomposites. The increase in the residual mass was due to the chemical structure of lignin, which indicates the less contribution to the material's burning ability due to its high ability to become charcoal and low heat release when burned, making it potentially used as a flame retardant for various applications.

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Kraft lignin as filler in PLA to improve ductility and thermal properties

Cited by 243 publications

References 49 publications

Bio-based polyurethane prepared from Kraft lignin and modified castor oil

Bio-based polyurethane prepared from Kraft lignin and modified castor oil

Natural antioxidants as stabilizers for polymers

Pengaruh Penambahan Lignin Terhadap Stabilitas Termal Biokomposit Poliasam Laktat / Lignin

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