高压正静电场对柠檬表面蜡质亲水性的影响

Effect of High-Voltage Positive Electrostatic Field on the Surface Hydrophilicity of Lemon

为探明在静电保鲜过程中不同电场参数对柠檬表皮蜡质亲水分子的影响,以柠檬角质层中成分含量最多的十六烷酸分子为研究对象,用分子模拟与理论分析和试验研究相结合的方法测定高压正静电场对柠檬表皮蜡质亲水性影响。结果表明,利用Materials Studio软件预测出正电场强度为180 kV/m时,十六烷基分子的MSD指数和偶极矩值均达到最小,亲水性最低。进一步用傅立叶红外光谱仪检测到,200 kV/m处理6天对十六烷酸羟基基团的抑制效果最好。最后采用Photoshop软件进行表面润湿性分析,验证在200 kV/m处理6天效果最佳。该试验初步筛选出了适宜柠檬贮藏的高压静电场电磁学的最佳参数,可为今后实际应用过程中选取合适的电场强度提供理论依据。

The paper aims to investigate the effects of different electrostatic field parameters on the hydrophilic molecules of lemon epidermal wax in the process of electrostatic preservation.In this study,palmitic acid molecule was used as the research object,and the effects of high-voltage positive electrostatic field on the surface hydrophilicity of lemon were measured by combining the molecular simulation with theoretical analysis and experimental research.The results show that 180 kV/m positive electrostatic field strength is predicted by Materials Studio software,under this level,the MSD index and dipole moment value of palmitic acid are the minimum,and the hydrophilicity is the lowest.Further,it was detected by Fourier transform infrared spectrometer that the hydroxyl group inhibition effect of palmitic acid was the best after treatment at 200 kV/m for 6 days.The surface wettability is analyzed by Photoshop software,and the best effect is finally verified under 200 kV/m for 6 d.In this experiment,the electrostatic field parameters suitable for lemon storage are preliminarily selected,which could provide a theoretical basis for selecting the appropriate electrostatic field strength in future application process.