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Lora, Jairo H.; Glasser, Wolfgang G.

doi:10.1023/a:1021070006895

Cited by 1,030 publications

(456 citation statements)

References 12 publications

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“…The conditions used were water and 0.2, 0.4 and 1 N of H 2 SO 4 and NaOH applied at 20 and 180°C to maize stover, miscanthus and sugarcane bagasse for 40 min. Figures 2 and 3 show the effect of increasing chemical treatment concentration on amount of sugars present in the pretreatment liquor at 20 and 180°C.…”

Section: Effects Of the Concentration Of Acid And Alkaline On Sugar Rmentioning

confidence: 99%

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Side by Side Comparison of Chemical Compounds Generated by Aqueous Pretreatments of Maize Stover, Miscanthus and Sugarcane Bagasse

et al. 2014

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In order to examine the potential for coproduct generation, we have characterised chemical compounds released by a range of alkaline and acidic aqueous pretreatments as well as the effect of these pretreatments on the saccharification ability of the lignocellulosic material. Comparative experiments were performed using three biomass types chosen for their potential as second-generation biofuel feedstocks: maize stover, miscanthus and sugarcane bagasse. The release of lignin from the feedstock correlated with the residual biomass saccharification potential, which was consistently higher after alkaline pretreament for all three feedstock types.Alkaline pretreatment released more complex mixtures of pentose and hexose sugars into the pretreatment liquor than did acid pretreatment. In addition, complex mixtures of aromatic and aliphatic compounds were released into pretreatment liquors under alkaline conditions, in a temperaturedependent manner, but far less so under acidic conditions. We show that the three feedstocks characterised interact with the pretreatment conditions in a specific manner to generate different ranges of products, highlighting the need to tailor pretreatments to both the starting feedstock and desired outcomes.

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Section: Effects Of the Concentration Of Acid And Alkaline On Sugar Rmentioning

confidence: 99%

“…However, it represents up to 30 % of the biomass and has diverse existing and potential industrial applications [4].…”

Section: Introductionmentioning

confidence: 99%

Side by Side Comparison of Chemical Compounds Generated by Aqueous Pretreatments of Maize Stover, Miscanthus and Sugarcane Bagasse

et al. 2014

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“…Lignosulfonate, a derivative polyelectrolyte of lignin that has good water solubility and amphiphilicity, is widely used in many industrial applications, such as concrete, coal-water slurry, textile dyeing, agrochemicals and oil recovery processes, etc. [9][10][11] However, in Asia and some places of the world where wood resources are less abundant, the utilization of nonwood plant materials such as straw, sugar cane bagasse and bamboo have been becoming increasing important. In South China, especially in Guangxi Province, sugar cane bagasse is an abundant natural solid lignocellulosic residue after extraction of juice from sugar cane stalk.…”

Section: Introductionmentioning

confidence: 99%

Extraction of lignin from sugar cane bagasse and its modification into a high performance dispersant for pesticide formulations

Li¹,

Ge²

2011

J. Braz. Chem. Soc.

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Com o objetivo de utilizar efetivamente um sub-produto de material não madeireiro, foi extraída lignina do bagaço de cana-de-açúcar via acidificação do licor negro. A lignina extraída do bagaço da cana-de-açúcar (EBL) foi modificada por oxidação, hidroximetilação e sulfonação em um lignossulfonato solúvel em água (EBL-M). O composto foi caracterizado por IR, UV, GPC e análise elementar. Os resultados mostraram que as unidades aromáticas do EBL-M foram mantidas e efetivamente sulfonadas e que a porcentagem de S foi alta (7,82%). A eficiência de dispersão de EBL-M para formulações pesticidas foi comparada com dispersantes comerciais via medição da frequência de suspensão. Como esperado, EBL-M mostrou a mesma eficiência de outros lignossulfonatos comerciais para dispersar kinsperse, quando usados para grânulos de dimetomorfe dispersíveis em água. A caracterização através do peso molecular e do teor de lignossulfonatos no grupo sulfônico, sugeriu que a eficiência dispersante aumentou com o maior teor de grupo sulfônico e maior peso molecular. Quando usado para grânulos de tribenuron dispersíveis em água, a eficiência dispersante de EBL-M foi muito próxima dos dispersantes comerciais.In order to effectively utilize a by-product of non-wood material, lignin was extracted from sugar cane bagasse via acidification of black liquor. The extracted sugar cane bagasse lignin (EBL) was modified by oxidation, hydroxymethylation, and sulfonation into a water-soluble lignosulfonate (EBL-M). It was characterized by IR, UV, GPC and elemental analysis. The results showed that the aromatic units of EBL-M were kept well and it was effectively sulfonated, that the percentage of S was high as 7.82%. The dispersing efficiency of EBL-M for pesticide formulations was compared with commercial dispersants via suspending rate measurement. As expected, EBL-M had the equal optimal dispersing efficiency to kinsperse than other commercial lignosulfonates when being used for dimethomorph water dispersible granules. The characterization of molecular weight and sulfonic group's content of lignosulfonates suggested that the dispersing efficiency increased with higher sulfonic group's content and higher molecular weight. As to being used for tribenuron water dispersible granules, the dispersing efficiency of EBL-M was much close to the commercial dispersants.

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“…Lignin, an amorphous component, starts plasticizing at a high temperature (above 200 °C) and behaves like a thermoplastic resin (Lora and Glasser 2002). Felby et al (1997) and Kharazipour et al (1997) suggested an enzymeassisted composite fabrication without using any adhesive.…”

Section: Hydrophilicmentioning

confidence: 99%

Laccase, an Emerging Tool to Fabricate Green Composites: A Review

Mahmood¹,

Hashim²,

Sulaiman³

et al. 2015

BioResources

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In the last two decades, laccases have received much attention from researchers because of their specific ability to oxidize lignin. This function of laccase is very useful for applications in several biotechnological processes, including delignification in the pulp and paper industry and the detoxification of industrial effluents from the textile and petrochemical industries. This review focuses on laccase-mediated fiberboard synthesis. Growing concerns regarding the emission of formaldehyde from wood composites has prompted industrialists to consider the fabrication of green composites. Laccase-mediated fiber treatments oxidize the lignin component without affecting the cellulose structure. As a result, free radicals are generated on the fiber surface, and these can act as potential reactive sites for further cross-linking reactions in board manufacturing. Binderless fiberboards prepared using such methods can be considered as green composites because the manufacturing process involves no additional resin.

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Cited by 1,030 publications

References 12 publications

Side by Side Comparison of Chemical Compounds Generated by Aqueous Pretreatments of Maize Stover, Miscanthus and Sugarcane Bagasse

Side by Side Comparison of Chemical Compounds Generated by Aqueous Pretreatments of Maize Stover, Miscanthus and Sugarcane Bagasse

Extraction of lignin from sugar cane bagasse and its modification into a high performance dispersant for pesticide formulations

Laccase, an Emerging Tool to Fabricate Green Composites: A Review

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