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Effect of carbon-rich biochar on mechanical properties of PLA-biochar composites
Sustainable Chemistry and Pharmacy ( IF 6 ) Pub Date : 2020-01-23 , DOI: 10.1016/j.scp.2019.100204
Kamonwan Aup-Ngoen , Mai Noipitak

Agricultural biomass residues are emerged from harvesting and processing of agricultural crops. When the crop production increases, a large amount of biomass residues is produced and remained after cutting of peel, bunch, straw and stalk of crops. In this work, agricultural biomass residues (cassava rhizome, durian peel, pineapple peel and corncob) were selected as feedstock for carbon-rich biochar (CRB) production using a facile pyrolysis method. Proximate analysis and thermogravimetric analysis (TGA) were used to characterize biomass feedstock. The results showed that the percentage of fixed carbon in biomass feedstock ranged between 11.91% and 17.51%. Characteristic differences of the CRB were investigated using scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), Fourier transform infrared spectroscopy (FTIR) and Raman spectroscopy. The carbon content in the CRB was found to significantly depend on biomass origin. Interestingly, cassava rhizome, which has a higher percentage of fixed carbon, is a superior precursor for CRB production. The study of different pyrolysis temperature indicated that the carbon content of cassava rhizome derived CRB is increased with pyrolysis temperature. The tensile properties of composite between poly(lactic acid) PLA and different types of biomass-derived CRB were investigated. PLA composite incorporated with a higher carbon content-CRB tended to exhibit improved mechanical properties. Specifically, the elastic modulus and impact energy of PLA/CRB composite specimens increased remarkably with the incorporation of CRB powder. The current research indicates that CRB prepared from agricultural biomass residues could be a sustainable material for utilization in PLA biocomposites.



中文翻译:

富碳生物炭对PLA生物炭复合材料力学性能的影响

农业生物质残留物来自农作物的收获和加工。当农作物产量增加时,在切割农作物的果皮,捆束,稻草和秸秆后,会产生大量的生物质残留物并保留下来。在这项工作中,选择了农业生物质残留物(木薯根茎,榴莲果皮,菠萝皮和玉米芯)作为原料,可通过简便的热解方法生产富碳生物炭(CRB)。近程分析和热重分析(TGA)用于表征生物质原料。结果表明,生物质原料中固定碳的百分比在11.91%至17.51%之间。使用扫描电子显微镜(SEM),能量色散X射线光谱仪(EDS)研究CRB的特性差异,傅里叶变换红外光谱(FTIR)和拉曼光谱。发现CRB中的碳含量显着取决于生物质的来源。有趣的是,具有较高固定碳百分比的木薯根茎是CRB生产的优良前体。不同热解温度的研究表明,木薯根茎来源的CRB的碳含量随热解温度的增加而增加。研究了聚乳酸与不同种类生物质衍生的CRB之间复合材料的拉伸性能。掺入较高碳含量的CRB的PLA复合材料往往表现出改善的机械性能。特别地,随着CRB粉末的加入,PLA / CRB复合材料样品的弹性模量和冲击能显着增加。

更新日期:2020-01-23
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