纸用香精微胶囊的制备及其应用

以柠檬香精为囊芯,壳聚糖和明胶为壁材,采用复凝聚法制备了香精微胶囊,通过红外光谱仪、激光粒度分析仪、电子显微镜、紫外分光光度计对微胶囊结构及性能进行表征。当复凝聚反应pH值为6.0～6.5,明胶质量浓度为2g/L,系统温度为40℃,乳化速度为700r/min时,制备的香精微球平均粒径为18μm,固化后的香精微胶囊平均粒径为91μm。将不同量的香精微胶囊添加到浆中抄片,通过TGA分析,当香精微胶囊添加量为8%时,手抄片的留香效果最佳。

Preparation and application of microcapsules for paper

Microcapsules, which was composed of the limonene flavor as core material, chitosan and gelatin as shell material, was prepared by the method of complex coacervation. Microcapsule was characterized by FTIR, particle size analyzer, electron microscopy and TGA. When the concentration of gelatin was 2g/l, the pH value was 6 to 6.5, the system temperature was 40°C, the emulsifying rate was 700r/min and the reaction time was 30min, the average particle size of microspheres was 18μm while the mierocapsule was 91μm. Several microcapsules agents were used in specialty paper by the method of addition in pulp. The results showed that after TGA analysis the paper performance was best with the dosage of 8% microcapsules.