2012年4月喬晉忠等,多壁碳納米管/聚碳酸酸復合材料的制備與性能●3.0. 8%時達到最大值67 MPa,比純PC薄膜拉伸強度參考文獻:提高了12%。這主要是由于,經(jīng)硝化氧化處理并在離子液體存在下,碳納米管發(fā)生了相當程度的解纏,[1] 趙文元,趙文明,王亦軍.聚合物材料的電學性能及其有利于其分散。同時,碳納米管與咪唑類離子液體應用[ M].北京:化學工業(yè)出版社,2006.的π_π交聯(lián)作用,有利于其在PC基體中的分散和[2] Lijima s. Helical microtubules of graphitic carbon[J].Nature , 1991 ,354(6348) :56-58.碳納米管與PC基體間的相互作用。當添加量小于1.0%時,在復合薄膜中能有效地抑制團聚現(xiàn)象,提[3] Holzinger M, Vostrowsky 0, Hirsch A, et al. Sidewallfunctionalization of carbon nanotubes [J]. Angew Chem高碳納米管與PC基體間的相容性和界面結合能力Int Ed ,200 ,40(21) :4002 4005.(見圖2所示),從而使復合材料的力學性能得到提[4] Kocharova N, Leiro J, Kankare J, et al. Aqueous disper-升。當碳納米管質量分數(shù)超過1.0%時,薄膜的拉sion, surface thiolation , and direct self-assembly of carbon伸強度較快地下降。這可能是因為,隨著添加量的nanotubes on gold[J]. Langmuir ,2007 ,23 :3-3371.增多,碳納米管之間的團聚現(xiàn)象增多,導致- -定程度[$]Fukushima T, Kosaka A, Yamamoto Y, et al. Dramatic的相分離。effect of dispersed carbon nanotubes on the mechanicaland electroconductibe properties of polymers derived from3結論ionic liquids[J]. Small ,2006 ,2(4) :554-560.多壁碳納米管在相容劑[ Bmim]PF的存在下，[6] Marcilla R,Cumi M L,Cozzoli P D,et al. Nano obiects ona round trip from water to organics in a polymeric ionic經(jīng)溶液混合法制備了MWNTs/PC納米復合薄膜;利liquid vehicle[ J]. Small 2006 ,2(4) :507-512.用TEM、SEM等檢測手段對碳納米管處理前后的形[7] Bellayer s,Gilman J W ,Eideman N,et al. Preparation of態(tài)結構、復合薄膜的表觀形態(tài)進行了表征;改善了碳homogeneously disperesed multiwalled carbon nanotube/納米管與PC的相容性,復合材料的拉伸強度得到polystyrene nanocomposites via melt extrusion using trial-了提高,導電閾值出現(xiàn)在碳納米管質量分數(shù)為kyl inidazolium compatibilizer [J]. Adv Funet Mater,1.0%~2.0%的范圍內。對復合材料剪切斷面的掃2005 ,15 :910-916.描電鏡分析表明,碳納米管比較均勻地分散在PC[8田蓉,李少卿,萬 麗,等.離子液體在碳納米管功基體中,沒有明顯的相分離,對PC起到了一定的增能化及復合材料中的應用研究進展[J].化工進展，2008, 27(10): 1569-1573.強作用。Preparation and properties of MWNTs/ polycarbonate compositeQIAO Jin-zhong, WANG Tong( School of Science, North University of China, Taiyuan Shanxi 030051, China)Abstract: Carbon nanotube/ polycarbonate nanocomposites were prepared via solution mixing using [ Bmim ] PF。compatibilizer. TEMand SEM were used to analyse micro-morphology of modified M WNTs and composite films. The content of MWNTs influencing on the electrical and mechanical properties were investigated. The results show that MWNTs were well dispersed in PC and the nanocomposite's mechanical properties is inhanced. Meanwhile, the percolation threshold of composites appears when the content of MWNTs is inrange of 1. 0% ~2. 0%.Key words: polycearbonate; MWNT; ionic liquids工信部推廣煤氣化節(jié)能技術為提高能源利用效率,工業(yè)和信息化部(簡稱工信部)將在“十二五”期間,選擇19家左右的以煤為原料的大、中型合成氨等煤化工企業(yè)進行技術改造,形成-定規(guī)模的以先進煤氣化技術為龍頭的煤氣化| 中國煤化工壓固定床煤氣化能力,實現(xiàn)年節(jié)約標準煤171萬t。這些企業(yè)將為合成氨等煤化工生產(chǎn)企業(yè)在MYHCN M H降低生產(chǎn)成本、實現(xiàn)節(jié)能降耗發(fā)揮積極的作用。(捕自《山西煤化工》)