酸掺杂纳米聚苯胺纤维的制备及酯化性能研究.pdfVIP

35 2 () http: //www. kustjourna.l com/ o.l 35 No2 20104 Journal ofKunm ingUniversity of Science andTechnology ( Science andTechnology) Apr. 2010 do:i 10. 3969/j. issn. 1007- 855x. 2010. 02. 021 杨晓霞, 陈思武, 苏丹丹, 贾庆明 ( , 650224) : 采用快速混合法制备了各种酸(硫酸盐酸硝酸及乙酸等)掺杂的纳米聚苯胺纤维, 扫描 子显微镜分析结果表明获得的聚苯胺纤维的直径在 50~ 200 nm之间, 酸掺杂类型对聚苯胺纤 维的形貌影响不大. 红外光谱及紫外可见光谱分析表明所得聚苯胺为掺杂态.以正 丁醇和冰乙酸 反应合成乙酸正 丁酯为目标反应,考察催化剂制备条件对其活性的影响规律, 结果表明掺杂酸为 硫酸, 其摩尔浓度为 2. 0mol/L, 苯胺摩尔浓度为0. 3mol/L,过硫酸铵与苯胺的摩尔浓度比为 1 2时,在相同反应条件下, 乙酸正 丁酯的收率最大,达 65. 66%. : 纳米聚苯胺纤维; 制备; 酯化 : TQ032. 41 : A : 1007- 855X( 2010)02- 0098- 04 Preparation andEsterification PropertiesofAcid- DopedPolyanilineNanofibers YANG X iaox ia, CHEN S iw u, SU Danda n, J AI Q ingm ing (Faculty ofChemicalEngineering, Kunm ing University ofScience and Technology, Kunm ing 650224, China) Abstract: Polyaniline nanofibers doped by a variety of acids ( sulfuric acid, hydrochloric acid, nitric acid and acetic acid, etc. ) are prepared by using rapidm ixturemethod. It is shown though the scanning electronm icros copy analysis that the diameter of thepolyaniline fiber is bewt een 50~ 200nm and that acid type has little effect on themorphologies. The polyaniline is found to be in the doping state through IR andU is spectralanalysis. The esterification ofNbutanol and acetic acid is regarded as the goal reaction to study the effects of preparation conditions on the catalytic activity. The results prove that the yield of nbutyl acetate reaches them ax value, a mounting to 65. 66%, when the doping acid is sulfuric acid, itsmolar concentration is2. 0mol/L, anilinemolar concentration is 0. 3mol/L, and ammonium persulfate and anilinemolar concentration ratio is 12. ey words: polyaniline nanofiber; preparation; esterification 0 . , . , ,.,