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Unburned Sugarcane Bagasse: Bio-based Phenolic Thermoset Composites as an Alternative for the Management of this Agrowaste
Journal of Polymers and the Environment ( IF 4.7 ) Pub Date : 2020-08-05 , DOI: 10.1007/s10924-020-01848-y
Cristina Gomes da Silva , Elisabete Frollini

Brazil has played a leading role in the global cultivation of sugarcane, used in the production of sugar and ethanol, which results in sugarcane bagasse as agrowaste. This agroresidue generates electricity and second-generation ethanol, but the colossal amount available allows for alternative applications. Currently, mechanized harvesting/unburn predominates over manual harvesting/burn. The present study was conducted in this scenario and investigated the use of fibers from unburned sugarcane bagasse (SBU) in bio-based composites. Phenolic thermoset was chosen as a matrix due to its excellent properties. The mechanization/unburn method allows the use of variable length fibers (this study: 1/3/5 cm, 30 wt%). SBU was characterized in detail, highlighting the characterization via inverse gas chromatography (IGC, which provides information regarding the polarity of the groups present on the surface of the fibers). Briefly, the composition of SBU shows no significant differences compared to burnt bagasse (SBB), and IGC showed that SBU has more polar groups on the surface than SBB, which favors intermolecular interactions and then adhesion with the phenolic matrix. Composites reinforced with 3- and 5-cm fibers presented a storage modulus higher than that of the unreinforced thermoset, and the impact strength of all composites was higher than that of the thermoset (up to 45%). This set of results points to applications such as rigid packaging, non-structural parts of buildings and automotive vehicles, which increases the applications of the investigated agrowaste within the circular bioeconomy.



中文翻译:

未燃烧的甘蔗蔗渣:生物基酚醛热固性复合材料,作为这种农作物废物管理的替代方法

巴西在用于糖和乙醇生产的全球甘蔗种植中发挥了领导作用,这导致甘蔗渣成为一种种植味。这种农业残留物会产生电力和第二代乙醇,但可用的巨大量可用于其他用途。当前,机械化收割/未燃烧比手动收割/燃烧更占优势。本研究是在这种情况下进行的,并研究了未燃烧的甘蔗渣(SBU)纤维在生物基复合材料中的使用。酚醛热固性树脂因其优异的性能而被选作基质。机械化/未燃烧方法允许使用可变长度的纤维(本研究:1/3/5 cm,30 wt%)。详细介绍了SBU的特征,重点介绍了通过反相气相色谱(IGC,提供有关纤维表面上基团极性的信息)。简而言之,与烧过的蔗渣(SBB)相比,SBU的组成没有显着差异,IGC表明SBU在表面上具有比SBB更多的极性基团,这有利于分子间的相互作用以及与酚醛基质的粘合。用3厘米和5厘米纤维增强的复合材料的储能模量高于未增强的热固性材料,所有复合材料的冲击强度均高于热固性材料(最高45%)。这组结果指向诸如刚性包装,建筑物和汽车的非结构性部件之类的应用,这增加了所研究的农业垃圾在圆形生物经济中的应用。简而言之,与烧过的蔗渣(SBB)相比,SBU的组成没有显着差异,IGC表明SBU在表面上具有比SBB更多的极性基团,这有利于分子间的相互作用以及与酚醛基质的粘合。用3厘米和5厘米纤维增强的复合材料的储能模量高于未增强的热固性材料,所有复合材料的冲击强度均高于热固性材料(最高45%)。这组结果指向诸如刚性包装,建筑物和汽车的非结构性部件之类的应用,这增加了所研究的农业垃圾在圆形生物经济中的应用。简而言之,与烧过的蔗渣(SBB)相比,SBU的组成没有显着差异,IGC表明SBU在表面上具有比SBB更多的极性基团,这有利于分子间的相互作用以及与酚醛基质的粘合。用3厘米和5厘米纤维增强的复合材料的储能模量高于未增强的热固性材料,所有复合材料的冲击强度均高于热固性材料(最高45%)。这组结果指出了诸如刚性包装,建筑物和汽车的非结构性零件之类的应用,这增加了所研究的农业垃圾在圆形生物经济中的应用。有利于分子间的相互作用,然后与酚醛基体粘合。用3厘米和5厘米纤维增强的复合材料的储能模量高于未增强的热固性材料,所有复合材料的冲击强度均高于热固性材料(最高45%)。这组结果指出了诸如刚性包装,建筑物和汽车的非结构性部件之类的应用,这增加了所研究的农业垃圾在圆形生物经济中的应用。有利于分子间的相互作用,然后与酚醛基体粘合。用3厘米和5厘米纤维增强的复合材料的储能模量高于未增强的热固性材料,所有复合材料的冲击强度均高于热固性材料(最高45%)。这组结果指出了诸如刚性包装,建筑物和汽车的非结构性零件之类的应用,这增加了所研究的农业垃圾在圆形生物经济中的应用。

更新日期:2020-10-13
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