以结晶紫内酯、双酚A和十四醇为原料,制备热致变色复配物。通过正交试验,确定三者之间的比例为m(结晶紫内酯)∶m(双酚A)∶m(十四醇)=1∶4∶70,搅拌温度为70℃、搅拌时间为2h,在此条件下制备的热致变色复配物变色效果最好。以热致变色复配物为芯材,明胶-阿拉伯树胶为壁材,通过复凝聚法制备热致变色微胶囊,在高剪切分散乳化机转速为3500r/min、固化时间为3h时,可获得表面光滑的球状微胶囊。制备的热致变色微胶囊变色性能、耐热性能及耐酸碱性能良好。
A thermochromic compound was prepared by using crystal violet lactone,bisphenol A and tetradecanol as raw materials.Through orthogonal experiments,the ratio between the three was determined to be m(crystal violet lactone)∶m(bisphenol A)∶m(tetradecanol)=1∶4∶70,and stirring temperature was 70℃ and stirring time was 2h,the thermochromic compound prepared under these conditions had the best discoloration effect.The microcapsules were prepared by the complex coacervation method using the thermochromic compound as the core material and gelatin-arabin gum as the wall material.The preparation conditions were as follows:the emulsification speed was 3500r/min,and the curing time was 3h,the spherical microcapsules with surface smooth were obtained.Prepartion of thermochromic microcapsule with good color-changing properties,heat resistance and acid-base resistance.
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