Evaluation of PLA–lignin bioplastics properties before and after accelerated weathering

Spiridon, Iuliana; Leluk, Karol; Resmeriță, Ana-Maria; Darie, Raluca Nicoleta

doi:10.1016/j.compositesb.2014.10.006

Cited by 186 publications

(122 citation statements)

References 31 publications

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“…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%

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

Tavares¹,

Boas²,

Schleder³

et al. 2016

Express Polym. Lett.

109

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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: Introductionmentioning

confidence: 99%

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

Tavares¹,

Boas²,

Schleder³

et al. 2016

Express Polym. Lett.

109

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“…Penelitian tentang pemanfaatan dan pengembangan lignin pada material komposit termoset, termoplastik, elastomer dan busa telah dilakukan17,18. Aplikasi lignin juga telah dilakukan dalam komposit dengan berbagai biopolimer seperti polihidroksi butirat 18 …”

Section: Pendahuluanunclassified

“…Hal ini membuktikan bahwa penambahan lignin ke dalam biokomposit PLA/ Lignin akan meningkatkan massa tersisa 16,18 yang membuktikan bahwa penambahan lignin ke dalam biokomposit PLA/Lignin dapat meningkatkan stabilitas termal biokomposit PLA/Lignin tersebut. Hal ini berhubungan dengan tingginya stabilitas termal lignin yang terkandung dalam biokomposit tersebut sehingga akan meningkatkan ketahanan termal bikomposit PLA/ Lignin.…”

Section: Hasil Dan Pembahasanunclassified

“…Meningkatnya massa yang tersisa ini disebabkan karena struktur kimia lignin yang kurang berkontribusi terhadap kemampuan terbakar suatu material yang disebabkan karena tingginya kemampuan menjadi arang dan rendahnya pelepasan panas ketika dibakar 2,39 sehingga lignin sendiri dapat berfungsi sebagai flame retardant 37 . Hal ini menunjukkan bahwa semakin banyak komposisi lignin yang ditambahkan ke dalam biokomposit PLA/ Lignin, maka kandungan arang akan semakin banyak pula 16,18,40 dan dapat mengakibatkan massa yang tersisa cenderung akan semakin banyak.…”

Section: Hasil Dan Pembahasanunclassified

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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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“…Various fundamental studies have been done to understand the effect of unmodified lignin on the physical properties of thermoplastic [12][13][14][15][16][17][18][19], thermosets [20], and rubbers [21]. Based on these studies, lignin has been documented to be a promising additive for stabilizing against UV degradation or thermo-oxidation [9,13,15,16,21].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Tribological Behavior of Ultra High Molecular Weight Polyethylene (UHMWPE)-Lignin Composites

2016

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Abstract:In this paper, we report the synthesis and characterization of ultra-high molecular weight polyethylene (UHMWPE)-lignin composites. During this study four different compositions, namely UHMWPE, UHMWPE-13 wt. % lignin, UHMWPE-25 wt. % lignin and UHMWPE-42.5 wt. % lignin were fabricated by hot pressing. Detailed microstructural studies by scanning electron microscopy (SEM) showed that UHMWPE and UHMWPE-13 wt. % lignin had a uniform microstructure, whereas UHMWPE-25 wt. % lignin and UHMWPE-42.5 wt. % lignin samples were riddled with pores. UHMWPE and UHMWPE-13% lignin showed comparable flexural strengths of~32.2 MPa and 32.4 MPa, respectively. However, the flexural strength dropped drastically in UHMWPE-25 wt. % lignin and UHMWPE-42.5 wt. % samples to~13 MPa and~8 MPa, respectively. The tribology of UHMWPE-lignin composites is governed by the tribofilm formation. All the compositions showed similar µ mean values and the specific wear rates (WR) decreased gradually as the concentration of lignin in UHMWPE was increased.

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Evaluation of PLA–lignin bioplastics properties before and after accelerated weathering

Cited by 186 publications

References 31 publications

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

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

Pengaruh Penambahan Lignin Terhadap Stabilitas Termal Biokomposit Poliasam Laktat / Lignin

Synthesis and Tribological Behavior of Ultra High Molecular Weight Polyethylene (UHMWPE)-Lignin Composites

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