利用外加电场法提纯液晶材料单体和混合液晶材料。研究表明, 该方法对不同类型液晶材料单体均有很好提纯效果, 酯类液晶的电阻率可以从1010 Ω·cm提高到1012 Ω·cm以上, 含氰基类液晶的电阻率可以从1010 Ω·cm提高到1012 Ω·cm左右, 结构稳定的含氟苯类液晶的电阻率可以从1011 Ω·cm提高到1013 Ω·cm以上。对一般混合液晶组合物而言, 其电阻率的提高也很明显, 从109 Ω·cm提高到1012 Ω·cm或从1010 Ω·cm提高到1013 Ω·cmm。 此外, 考察了外加电场强度、提纯时间和液晶材料用量对提纯效果的影响。

The liquid crystal monomers and the mixed liquid crystal materials had been purified by strong electric field. The results show that the purification has perfect effect by this method for different liquid crystal. The resistivity enhances from 1010 Ω·cm to 1012 Ω·cm for liquid crystal contained the ester function or the cyanogen function. The resistivity enhances from 1011Ω·cm to 1013 Ω·cm for the stable structure liquid crystal contained the fluorin and benzene function.The resistivity increases evidently from 109 Ω·cm to 1012 Ω·cm, or from 1010 Ω·cm to 1013 Ω·cm for the mixed liquid crystal. In addition, the influence of electric field strength, purified time and the liquid crystal dosage on purified effect have been investigated, respectively.