壳聚糖包覆腐殖酸微胶囊的制备及其保水性能研究

Preparation And Water Retention Property of Chitosan Coated Humic Acid Microcapsule

摘要:

以壳聚糖(CTS)为壁材，腐殖酸(HA)为芯材，制备了壳聚糖包覆腐殖酸(CTS/HA)微胶囊。通过FTIR、POM和SEM分别表征和观察CTS/HA微胶囊的结构和表面形貌，探讨了不同芯壁比、固化剂含量和搅拌速度对微胶囊表面形态的影响，并测试了CTS/HA的保水性能。结果表明：CTS/HA呈现包覆微胶囊结构，当CTS/HA质量比为1:3，固化剂用量为CTS/HA总质量的1%，搅拌速度为500r/min时，微胶囊具有较好的表面形态，且具有较好的吸水和保水性能，其12h的吸水率和保水率分别高达248%和158%。

Abstract:

Chitosan coated humic acid (CTS/HA) microcapsules as a new kind of water retention materials were prepared using chitosan (CTS) as wall materials and humic acid (HA) as the cores. The structure and surface morphology of CTS/HA were characterized and observed by fourier transform infrared Spectrum (FTIR), polarizing microscope (POM) and scanning electron microscope (SEM), respectively. The influences of m(CTS)/m(HA), curing agent content and stirring rate were discussed on the surface morphology of microcapsules, and the water-retention of CTS/HA was also tested. The results showed that CTS/HA displayed good surface morphology microcapsule when the m(CTS)/m(HA) was 1:3, the content of curing agent was 1% of the total mass for CTS/HA and the stirring rate was 500 r/min. In addition, the microcapsule had good water absorption and water retention performance with water absorption rate and water retention rate as high as 248% and 158% in 12 h, respectively.