Unburned Sugarcane Bagasse: Bio-based Phenolic Thermoset Composites as an Alternative for the Management of this Agrowaste

Silva, Cristina Gomes da; Frollini, Elisabete

doi:10.1007/s10924-020-01848-y

Cited by 17 publications

(9 citation statements)

References 21 publications

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“…The band attributed to the amide group III is identified by the bands NH at 1302 cm −1 and C-O at 1220 cm −1 , correlated to the C-N and N–H stretch vibrations. Besides, other essential peaks were detected referent to flexible polyol at 1706 cm −1 and 1041 cm −1 correlated to carbonyl groups (C=O) and aromatic rings at 1593 25 , 26 .…”

Section: Resultsmentioning

confidence: 98%

Performance of castor oil polyurethane resin in composite with the piassava fibers residue from the Amazon

Rabelo Aparício,

Machado dos Santos,

Siqueira Magalhães Rebelo

et al. 2024

Sci Rep

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The use of castor oil in producing polyurethane resins has been identified as one of the most promising options for the industry. The piassava fibers waste generated by the industry on a large scale presents excellent properties as a reinforcing agent due to its high lignin content characterized by chemical tests and FTIR. Composite boards consisting of a higher content of mercerized piassava fibers (10 mm, 85 wt.%) reinforced polyurethane castor oil-based resin (prepolymer (PP) and polyol (OM)) exhibited excellent performance. Composites with these properties have strong potential for medium-density applications ranging from biomedical prosthetics to civil partition walls and insulation linings. Alkali treatment removed the superficial impurities of piassava fibers, activating polar groups, and physical characterization reported excellent performance for all composites. Among the composites, the CP3 sample (composite reinforced with piassava fibers (85 wt.% fibers; 1.2:1—PP:OM)) stood out with higher density and lower swelling and water absorption percentage than other composites. FTIR results indicated NCO traces after the resin cured in the PU3 (1.2:1—PP:OM), possibly contributing to the interaction with the fibers. DMA results reported relevant information about more flexibility to CP1 (composite reinforced with piassava fibers (85 wt.% fibers; 0.8:1—PP:OM)) and CP3 than CP2 (composite reinforced with piassava fibers (85 wt.% fibers; 1:1—PP:OM)). The results suggest that the proper combination with natural products must lead to composites with potential applications as engineering materials.

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Section: Resultsmentioning

confidence: 98%

Performance of castor oil polyurethane resin in composite with the piassava fibers residue from the Amazon

Rabelo Aparício,

Machado dos Santos,

Siqueira Magalhães Rebelo

et al. 2024

Sci Rep

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show abstract

“…The band attributed to the amide group III is identi ed by the bands NH at 1302 cm -1 and C-O at 1220 cm -1 , correlated to the C-N and N-H stretch vibrations. Besides, other essential peaks were detected referent to exible polyol at 1706 cm -1 and 1041 cm -1 correlated to carbonyl groups (C=O), and aromatic rings at 1593 [25], [26].…”

Section: Resultsmentioning

confidence: 99%

Performance of castor oil polyurethane resin in composite with the piassava fibers residue from the Amazon.

Aparício,

Santos,

Giacon

et al. 2023

Preprint

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The intensive global environmental changes have motivated researchers to follow new routes to reuse or recycle waste. Castor oil for producing polyurethanes is one of the most viable routes for resin production. This study combined castor oil resin-based with the piassava fibers waste generated by the industry. Higher content of mercerized piassaba fibers (10 mm, 85 wt.%) reinforced polyurethane castor oil-based resin, resulting in composite boards. Characterizations included FTIR, TGA, DSC, FTIR, DMA, and SEM analyses. Piassaba fibers, after alkaline treatment, present excellent performance reported by physical characterization for all composites, highlighting the CP3 sample with higher density and lower swelling and water absorption percentage than other composites. FTIR results indicated NCO traces after the resin cured in the PU3, possibly contributing to the interaction with the fibers. DMA results reported relevant information about more flexibility to CP1 and CP3 than CP2. This study suggests that the proper combination with natural products must lead to composites with potential applications as engineering materials.

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“…However, waste seems to be a more common source, as it enables value recovery. Bioenergy from waste has been taking place through various feedstocks, including fruit peels, sewage sludge [77], agricultural waste (corn, wheat, sorghum, barley, coffee, beans, and sugar cane) [18,52,53,59,74], coffee husks at processing facilities [63], orange peel [72], and livestock and slaughterhouse waste [83].…”

Section: Bioenergy From Wastementioning

confidence: 99%

“…In Brazil, efforts towards a bioeconomy could be seen from as early as 1975, as a political response to the 1970s' oil crisis, with the creation of the National Alcohol Program (Proálcool), the world's first large-scale biofuels program [17], whose mission was to stimulate the replacement of petroleum fuels with alcohol made from sugarcane [4]. In Brazil, a progressive law (Law 11.241) was approved in 2002, which led agriculturists to gradually reduce the burning of crop biomass and introduce mechanized harvesting, which practice is expected to reach 100% of sugarcane fields by 2021 and 2031 for areas that are mechanized and not yet mechanized, respectively [18].…”

Section: Public Initiative Actions Towards a Circular Bioeconomy In Latin America And The Caribbeanmentioning

confidence: 99%

Current Panorama, Practice Gaps, and Recommendations to Accelerate the Transition to a Circular Bioeconomy in Latin America and the Caribbean

et al. 2022

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The rampant use of resources and the increasing risk of scarcity have been contributing to greater awareness regarding the need for maintaining resources in use for longer and the shift to renewable alternatives, in which perspective the concept of a circular bioeconomy (CBE) has been permeating the most diverse sectors. Therefore, the study's aims were manifold: identify (i) existing practices and initiatives, (ii) barriers and potential opportunities and (iii) existing gaps for advancing a circular bioeconomy in Latin America and the Caribbean (LAC) and (iv) provide recommendations aiming at the development of a circular bioeconomy (CBE) in the region. To that end, a systematic review of the existing academic literature was done, and reports from relevant non-peer reviewed sources were also consulted. CBE practices in LAC are concentrated in only a few of the countries in the region and very much revolve around recovering value from by-products and waste streams. There are a range of economic, technological, environmental, and social barriers. Opportunities for a CBE are mainly related to the use of waste as raw material (found abundantly in the countries being investigated) and the use of new techniques/technologies. The gaps between the current state and a successful CBE are related to policy, scaling-up, collaborations, and establishing efficient business models. Recommendations for a successful CBE in the region include greater engagement of public actors, investing and developing the local economy, establishing biorefineries and industrial parks, and finding new technological routes for bioresources.

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Unburned Sugarcane Bagasse: Bio-based Phenolic Thermoset Composites as an Alternative for the Management of this Agrowaste

Cited by 17 publications

References 21 publications

Performance of castor oil polyurethane resin in composite with the piassava fibers residue from the Amazon

Performance of castor oil polyurethane resin in composite with the piassava fibers residue from the Amazon

Performance of castor oil polyurethane resin in composite with the piassava fibers residue from the Amazon.

Current Panorama, Practice Gaps, and Recommendations to Accelerate the Transition to a Circular Bioeconomy in Latin America and the Caribbean

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