无烟煤伴生石墨制备类石墨烯/环氧树脂复合材料及其导热性能研究
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摘要
作为一种天然矿物,无烟煤伴生石墨在材料领域的应用受限于其本身含有的灰分和结构缺陷。研究了在不使用各类化学方法去除无烟煤伴生石墨中的灰分、不对无烟煤伴生石墨进行高温石墨化处理的前提下,采用低温热处理法制备类石墨烯片,并通过拉曼光谱、透射电子显微镜、光学显微镜等分析手段鉴别不同热温度所制备的类石墨烯片的品质,发现550℃热处理制备的类石墨烯片品质最佳;将550℃热处理制备的类石墨烯片与环氧树脂复合得到类石墨烯/环氧树脂复合材料。研究表明,该复合材料具有良好的导热性能,在类石墨烯片添加量为20%(质量分数)时,复合材料的热导率较纯环氧树脂提高86.2%。
As a natural mineral,the application of anthracite associated graphite is limited by the ash content and defects when it is used as a material.A graphene-like material was obtained by heat treatment of anthracite associated graphite at low temperature without all kinds of chemical methods to remove ash from anthracite associated graphite or high temperature graphitization of anthracite associated graphite.The best quality graphene-like sheets were selected by Raman spectroscopy,TEM and optical microscopy to make a composite material with epoxy resin.The research showed that the thermal conductivity of the composite was 86.2% higher than that of pure epoxy resin when the weight fraction of graphene-like sheets was 20%.
As a natural mineral,the application of anthracite associated graphite is limited by the ash content and defects when it is used as a material.A graphene-like material was obtained by heat treatment of anthracite associated graphite at low temperature without all kinds of chemical methods to remove ash from anthracite associated graphite or high temperature graphitization of anthracite associated graphite.The best quality graphene-like sheets were selected by Raman spectroscopy,TEM and optical microscopy to make a composite material with epoxy resin.The research showed that the thermal conductivity of the composite was 86.2% higher than that of pure epoxy resin when the weight fraction of graphene-like sheets was 20%.
引文
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[3] Savitskii D P.Preparation and characterization of colloidal dispersions of graphene-like structures from different ranks of coals[J].Journal of Fuel Chemistry and Technology,2017,45(8):897-907.
[4] Wilson M A,Patney H K,Kalman J.New developments in the formation of nanotubes from caol[J].Fuel,2002,81:5-14.
[5] Uriel Sierra,Patricia A lvarez,Clara Blanco,et al.New alternatives to graphite for producing graphene materials[J].Carbon,2015,93:812-818.
[6] Pratima Meshram,Purohit B K,Sinha M K,et al.Demineralization of low grade coal-areview[J].Renewable and Sustainable Energy Reviews,2015,41:745-761.
[7] 杨丽坤,蒲明峰.太西无烟煤伴生石墨制备石墨烯的研究[J].煤炭加工与综合利用,2013(5):58-60.
[8] 赵雪淞,石倩倩,任瑞晨,等.无烟煤基微晶石墨鉴定试验研究[J].硅酸盐通报,2016,35(3):933-937.
[9] 马历乔,向左良.无烟煤石墨化的研究[J].炭素技术,2004,23(2):40-43.
[10] 张伟娜,何伟,张新荔.石墨烯的制备方法及其应用特性[J].化工新型材料,2010,38(增刊):15-18.
[11] Sushanta K B,Sudipto Chakraborty,Meikap B C.Chemical demineralization of high ash Indian coal by using alkali and acid solutions[J].Fuel,2017,196:102-109.
[12] Hareema Saleem,Mobeen Haneef,Hina Y A.Synthesis route of reduced graphene oxide via thermal reduction of chemically exfoliated graphene oxide[J].Materials Chemistry and Physics,2018,204:1-7.
[13] 高源,陈国华.聚合物/石墨烯复合材料制备研究新进展及其产业化现状[J].高分子学报,2014(10):1314-1327.
[14] 袁韵茹,张凌燕,邱杨率,等.莫桑比克大鳞片石墨化学提纯试验研究[J].硅酸盐通报,2017,36(8):2600-2606.
[15] 张琳,方建军,赵敏捷,等.隐晶质石墨提纯研究进展[J].化工进展,2017,36(1):261-267.
[16] Liliane Bokobza,Jean-Luc Bruneel,Michel Couzi.Raman spectroscopy as a tool for the analysis of carbon-basedmaterials(highly oriented pyrolitic graphite,multilayer grapheneand multiwall carbon nanotubes)and of some of their elastomeric composites[J].Vibrational Spectroscopy,2014,74:57-63.
[17] Ulyanova E V,Molchanov A N,Prokhorov I Y,et al.Fine structure of Raman spectra in coals of different rank[J].International Journal of Coal Geology,2014,121:37-43.
[18] Gerd Rantitsch,Wolfgang Lmmerer,Evelin Fisslthaler,et al.On the discrimination of semi-graphite and graphite by Raman spectroscopy[J].International Journal of Coal Geology,2016,159:48-56.
[19] Tuinstra F,Koenig J L.Raman spectrum of graphite[J].The Journal of Chemical Physics,1970,3(53):1126-1130.
[20] Irena Kostovaa,Laura Tormob,Elena Crespo-Feoc,et al.Study of coal and graphite specimens by means of Raman and cathodoluminescence[J].Spectrochimica Acta Part A,2012,91:67-74.
[21] 赵博,杨永忠,刘丽婷,等.拉曼光谱技术在煤分析中的应用进展[J].洁净煤技术,2015,21(3):79-82.