摘要
以季铵化壳聚糖(QCTS)为壁材、腐殖酸(HA)为芯材,制备了季铵化壳聚糖包覆腐殖酸(QCTS/HA)微胶囊。采用傅里叶变换红外光谱(FTIR)、偏光显微镜(POM)、扫描电子显微镜(SEM)对微胶囊的性能进行了表征。以芯壁比[m(HA)∶m(QCTS)]、固化剂硫酸钠的用量和搅拌速度作为单因素,探讨了微胶囊的最佳制备条件。并且对最佳制备条件下的微胶囊进行了形貌观测以及吸水性和保水性测试。结果表明,QCTS/HA微胶囊的最佳制备条件为:m(HA)∶m(QCTS)=3∶1,硫酸钠用量为QCTS/HA总质量的1.0%,搅拌速度为500 r/min;与相同制备条件得到的未改性微胶囊CTS/HA相比,改性后的QCTS/HA微胶囊包覆层表面孔隙结构比较完善,分布均匀,孔洞较多,具有更加优异的吸水性和保水性,其12 h的吸水率和保水率分别高达348%和208%。
Quaternized chitosan coated humic acid（ QCTS/HA） microcapsules as a new kind of water retention materials were prepared using quaternized chitosan（ QCTS） as wall materials and humic acid（ HA） as the cores. The performances of the microcapsules were characterized by Fourier transform infrared（ FTIR） spectroscope,polarizing microscope（ POM） and scanning electron microscope（ SEM）,respectively. The factors affecting the preparation of QCTS/HA microcapsules were discussed,such as the core-wall ratio [m（ HA） ∶ m（ QCTS） ],the dosage of curing agent（ sodium sulfate） and stirring rate. Additionally,micro-structures of QCTS/HA microcapsules prepared under optimal conditions were observed,and the water-absorption and water-retention properties of the product was tested. The results showed that QCTS/HA microcapsules had the best performance when the m（ HA） ∶m（ QCTS） was 3∶1,the dosage of curing agent was 1. 0% of the total mass of QCTS and HA,and the stirring rate was 500 r/min. Compared with that of CTS/HA microcapsules under the same conditions,the pores on the surface of QCTS/HA microcapsules were perfect and well-distributed,and the number of pores were quite great. In addition,the microcapsules had excellent water absorption and water retention performance with water absorption rate and water retention rate as high as 348% and 208% in12 h,respectively.
出处
《精细化工》
EI
CAS
CSCD
北大核心
2017年第9期967-974,共8页
Fine Chemicals
基金
陕西省农业厅科技专项资金项目(NYKJ-2017-01)~~
关键词
季铵化壳聚糖
腐殖酸
核壳结构
微胶囊
吸水性
保水性
功能材料
quaternized chitosan
humic acid
core-shell structure
microcapsule
water absorption
water retention
functional materials
