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废弃棉纤维、粘胶纤维和微晶纤维素水热炭化制备炭微球的对比研究(英文)

发布时间:2021-09-07 17:06
  选择废弃棉纤维和粘胶纤维两种纺织纤维作为水热炭化原料,并以微晶纤维素为模型底物进行对比,研究原料结构对水热炭化条件及产物的影响。结果表明,高结晶度的棉纤维(60.35%)和微晶纤维素(60.24%)制备炭微球的最佳条件分别是330℃,6 h,0.15%CuSO4和310℃,6 h,0.10%CuSO4,而低结晶度(34.31%)的粘胶纤维的最佳条件为260℃,8 h。结晶度越低,水热炭化条件越温和,而聚合度对其影响不显著。采用SEM、XRD、FTIR、TG和EDS对炭化产物进行表征,结果表明,不同原料合成的炭微球具有类似的无定型结构和丰富的官能团,但棉纤维和微晶纤维素合成的炭微球具有更高的碳含量和热稳定性,这可能是更高的水热炭化温度所致。因此,纤维素结晶度是影响其水热炭化合成炭微球的重要因素。 

【文章来源】:新型炭材料. 2020,35(03)北大核心EISCICSCD

【文章页数】:9 页

【文章目录】:
1 Introduction
2 M aterials and methods
    2.1 Materials
    2.2 Hydrothermal carbonization
    2.3 Characterization of carbon microspheres
    2.4 Determination of crystalline structure and de-gree of polymerization
3 Results and discussion
    3.1 The measurement of crystallinity and poly-merization of cellulosic materials
    3.2 Hydrothermal carbonization of cotton fibers,viscose fibers and Avicel
    3.3 Structural comparison of carbonized prod-ucts from cotton fibers,Avicel and viscose fibers
    3.4 The relationship between HTC conditions and structure of cellulosic materials
    3.5 Mechanism analysis of hydrothermal carboni-zation of cellulosic materials
4 Conclusion



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