油茶籽壳水热碳微球在不同溶液中的分散性研究
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摘要
以废弃油茶籽壳为原料,在间苯三酚助剂存在下,通过低温水热碳化法制备出碳微球颗粒。并将等量的碳微球颗粒置于不同pH值的水溶液及乙醇和环己烷2种不同极性有机溶液中,对其分散性进行了研究,并结合碳微球的FT-IR、XPS性能,对影响其分散性的原因进行了探讨。通过实验结果分析可知,不同pH、极性介质的溶液分别是通过使碳微球表面呈现出不同的阴阳离子特性或与碳微球之间形成分子间氢键,从而影响其在不同溶液中的分散性。由此解释了碳微球的分散性在碱性溶液中强于酸性溶液,在极性有机溶液中分散性最好,而在非极性有机溶液中几乎无法分散开来的原因。实验结果将为油茶籽壳水热碳微球在不同pH及不同极性介质中的实际应用提供了一定的基础参考数据。
Carbon microspheres were prepared by low temperature hydrothermal carbonization using Camellia oleifera seed shells as precursor and phloroglucinol as additive. The dispersivity of the carbon microspheres in different pH aqueous solution, ethanol and cyclohexane was studied. Combined with the results of FT-IR and XPS characterization of carbon microspheres, the factors that influenced the dispersion were discussed. This work provides some basic data for the practical application of the as-prepared hydrothermal carbon microspheres in different pH and different polar media. It can be seen from the experimental results that the solutions of different pH and different polar media respectively affect the surface of carbon microspheres by exhibiting different anion and cation properties or form intermolecular hydrogen bonds with the carbon microspheres, thereby affecting their dispersibility in different solutions. This explains that the dispersibility of carbon microspheres in the alkaline solution is better than the acidic solution, which is the most dispersible in a polar organic solution and almost impossible to disperse in a non-polar organic solution. This work will provide some basic data for the practical application of the as-prepared hydrothermal carbon microspheres in different pH and different polar media.
Carbon microspheres were prepared by low temperature hydrothermal carbonization using Camellia oleifera seed shells as precursor and phloroglucinol as additive. The dispersivity of the carbon microspheres in different pH aqueous solution, ethanol and cyclohexane was studied. Combined with the results of FT-IR and XPS characterization of carbon microspheres, the factors that influenced the dispersion were discussed. This work provides some basic data for the practical application of the as-prepared hydrothermal carbon microspheres in different pH and different polar media. It can be seen from the experimental results that the solutions of different pH and different polar media respectively affect the surface of carbon microspheres by exhibiting different anion and cation properties or form intermolecular hydrogen bonds with the carbon microspheres, thereby affecting their dispersibility in different solutions. This explains that the dispersibility of carbon microspheres in the alkaline solution is better than the acidic solution, which is the most dispersible in a polar organic solution and almost impossible to disperse in a non-polar organic solution. This work will provide some basic data for the practical application of the as-prepared hydrothermal carbon microspheres in different pH and different polar media.
引文
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[2]Ching T W,Haritos V,Tanksale A. Ultrasound-assisted conversion of cellulose into hydrogel and functional carbon material[J]. Cellulose,2018,25(4):2629–2645.
[3]Dittrich B,Wartig K A,Hofmann D,et al. Flame retardancy through carbon nanomaterials:Carbon black,multiwall nanotubes,expanded graphite,multi-layer graphene and graphene in polypropylene[J]. Polymer Degradation and Stability,2013,98(8):1495–1505.
[4]Ma X,Yuan H,Zhang H. Preparation,characterization and application of sulfonated mesoporous hollow carbon microspheres[J]. Journal of Porous Materials,2018(6):1–8.
[5]朱秋荣,侯文生,史晟,等.碳微球的研究进展[J].化工进展,2014(7):1780–1785.
[6]Xue B,Mei N,Yang Y,et al. Multi-functional carbon microspheres with double shell layers for flame retardant poly(ethylene terephthalate)[J]. Applied Surface Science,2018,435:656–665.
[7]Liang G,Qin X,Zou J,et al. Electrosprayed silicon-embedded porous carbon microspheres as lithium-ion battery anodes with exceptional rate capacities[J]. Carbon,2018,127:423–431.
[8]Nicolas B,Ken S,Linghui Y,et al. Hydrothermal carbon-based nanostructured hollow spheres as electrode materials for high-power lithium-sulfur batteries[J]. Physical Chemistry Chemical Physics,2013,15(16):6080–6087.
[9]Wang X,Jin L,Xu W,et al. One-step hydrothermal preparation of amino-functionalized carbon spheres at low temperature and their enhanced adsorption performance towards Cr(VI)for water purification[J].Colloids&Surfaces A:Physicochemical&Engineering Aspects,2012,415(48):288–294.
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[11]唐楷,王勇明,王美玲,等.水溶液中纳米二氧化钛分散技术研究进展[J].涂料技术与文摘,2011(2):29–31.
[12]王纲,姜成群,高彩艳,等.导电聚合物PEDOT在有机溶剂中的分散性研究[J].高分子学报,2014(11):1532–1538.
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