离子液体电导率及溶解硅产业副产物SiCl_4研究  

Study on Ionic Liquids Conductivity and Dissolving by-Product SiCl_4 from Polysilicon Industry

作　　者：程成[1] 张承龙[1] 王景伟[1] 白建峰[1] 苑文仪[1] 徐敏[1] 

机构地区：[1]上海第二工业大学电子废弃物研究中心上海电子废弃物资源化协同创新中心,上海201209

出　　处：《有色金属（冶炼部分）》2016年第8期31-34,共4页Nonferrous Metals（Extractive Metallurgy)

基　　金：国家自然科学基金面上项目(51474146);上海市自然科学基金项目(14ZR1416900);上海第二工业大学研究生项目基金(A01GY16F030);上海第二工业大学校重点学科建设项目(XXKZD1602)

摘　　要：以离子液体1-丁基-3-甲基咪唑三氟甲烷磺酸盐([BMIM]OTf)、1-辛基-3-甲基咪唑双三氟甲磺酰亚胺盐([OMIM]NTf2)为溶剂,考察温度、PC添加量对SiCl_4溶解量的影响,并研究离子液体在不同条件下的电导率。结果表明,在不同温度下,[OMIM]NTf2的溶解效果比[BMIM]OTf好,两种离子液体对SiCl_4的溶解效果随温度的降低而上升,0℃时,[OMIM]NTf2溶解量达到最大为0.6g/mL。PC可溶解少量SiCl_4,平均稳定在0.06g/mL,且溶解量受温度影响较小。离子液体电导率较低,[BMIM]OTf较[OMIM]NTf2的电导率要高,随着温度的升高电导率增大,添加PC后两者电导率都显著提升。建议在0℃下利用[OMIM]NTf2溶解SiCl_4,同时按照离子液体、PC按1∶1质量比配制电解液,此时电导率为15.08mS/cm。Effects of temperature and addition of PC on dissolving of SiCl4 from polysilicon industry were investigated applying ionic liquids （ILs） called 1-butyl-3-methylimidazolium trifluoromethanesulfonate （[BMIM] OTf） and 1-octyl-3-methylimidazolium bis （（trifluoromethyl） sulfonyl） imide （[OMIM] NTf2）as solvents.ILs conductivity under different conditions was examined.The results show that [OMIM]NTf2 has better performance than [BMIM]OTf in dissolving load at different temperature.Dissolving load for SiCl4 in both ionic liquids rises with drop of temperature.[OMIM]NTf2 obtains a maximum dissolving load of 0.6 g/mL at 0℃.Little SiCl4 can be dissolved in PC with load of about 0.06 g/mL on average and temperature has little influence on load.Conductivity of ILs is low,and [BMIM] OTf has higher conductivity than [OMIM]NTf2.Conductivity of ILs rises with increase of temperature with a dramatic rise upon addition of some PC.It is proposed that [OMIM]NTf2 should be chosen as solvent to dissolve SiCl4 with mass ratio of [OMIM]NTf2 and SiCl4 of 1 ∶ 1 at 0 ℃ to realize conductivity of 15.08 mS/cm.

关 键 词：离子液体 溶解 四氯化硅 电导率 

分 类 号：TN304.05[电子电信—物理电子学]