中文摘要：

以氯化胆碱（ChCl）和水合草酸（H_2C_2O_4·2H_2O）为原料合成氯化胆碱/水合草酸低共熔溶剂（ChCl/H_2C_2O_4·2H_2O DESs）。研究ChCl/H_2C_2O_4·2H_2O DESs的组成与熔点的关系,1ChCl：1H_2C_2O_4·2H_2O DES的黏度、电导率与温度的关系,ZnO在1ChCl：1H_2C_2O_4·2H_2O DES中的溶解度及溶解行为。研究结果表明：1ChCl：1H_2C_2O_4·2H_2O DES的低共熔点为9℃,在150℃以内具有热稳定性;随温度从297 K升高到333 K,1ChCl：1H_2C_2O_4·2H_2O DES的黏度从199.4 m Pa·s降低到35.6 m Pa·s,电导率则从3.55 m S/cm增大至15.01 m S/cm,ZnO的溶解度由0.310 mol/L增至0.860 mol/L;未发现ZnO与体系中的正离子或负离子结合成离子物种形式存在,溶解于1ChCl：1H_2C_2O_4·2H_2O DES中的ZnO与体系中的草酸反应生成可溶于该体系的ZnC_2O_4。

英文摘要：

Choline chloride/oxalate hydrates deep eutectic solvents（ChCl/H_2C_2O_4·2H_2O DESs） were synthesized with choline chloride（ChCl） and oxalate hydrates（H_2C_2O_4·2H_2O）. The melting point of ChCl/H_2C_2O4·2H_2O DESs as a function of composition, the electrical conductivities and viscosities of 1ChCl：1H_2C_2O_4·2H_2O DES as a function of temperature, solubility of ZnO and the form of ZnO in the DES system were researched. The results show that the eutectic point of 1ChCl：1H_2C_2O_4 ·2H_2O DES is 9 ℃, the DES is thermal stability from room temperature to 150 ℃. At 297-333 K, the viscosity of 1ChCl：1H_2C_2O_4·2H_2O DES reduces from 199.4 m Pa·s to 35.6 m Pa·s, the electrical conductivity increases from 3.55 m S/cm to 15.01 m S/cm, and the solubility of ZnO increases from 0.310 mol/L to 0.860 mol/L. There is no ion species form from ZnO combined with any cation or anion species in DES system. ZnO dissolved in the DESs reacts with oxalic acid and generates ZnC_2O_4.