摘要
以魔芋和丙烯酸钠作为原料,采用反向悬浮聚合法制备魔芋葡甘聚糖基超强吸水颗粒(KSAP),测试其吸水和保水性能,并利用傅里叶变换红外光谱仪、电子扫描显微镜、热重分析仪和X射线衍射等对KSAP进行性能表征。结果表明,该方法制备的KSAP颗粒吸水率高达698 g/g,保水率为95%左右,保水时间在10 d以上。分析发现,KSAP是魔芋葡甘聚糖和丙烯酸钠反应得到的粒径在1.20~1.50 mm的球状颗粒,平均粒径为1.33 mm,颗粒表面光滑,大小均一;比原料魔芋精粉的热稳定更好,结晶度更高;KSAP吸水后的挤压率为48.9%,挤压程度可达自身尺寸的1/2,具有良好的弹性性能。
The konjac glucomannan-based superabsorbent particles(KSAP) were prepared by reverse suspension polymerization using konjac and sodium acrylate as raw material, and the water absorption and water retention properties were tested. The structure and properties of KSAP were characterized by Fourier transform infrared spectroscopy, electron scanning microscopy, thermogravimetric analysis and X-ray diffraction. The results show that the KSAP particles prepared by this method have a water absorption rate of 698 g/g, a water retention rate of about 95% and a water retention time of more than 10 d. KSAP is spherical particles with the particle size of 1.20~1.50 mm obtained by the reaction of konjac glucomannan and sodium acrylate. The average particle size is 1.33 mm. The particle surface is smooth and uniform in size, which has better thermal stability and higher crystallinity than raw konjac flour. KSAP has a compression ratio of 48.9% after water absorption, and the extrusion degree can reach half of its own size, and has good elastic properties.
作者
李彦军
胡媛
毛跟年
王勇
邹乐男
李林涛
李娜
何亚娟
Yanjun Li;Yuan Hu;Gennian Mao;Yong Wang;Lenan Zou;Lintao Li;Na Li;Yajuan He(School of Food and Bioengineering,Shaanxi University of Science and Technology,Xi’an 710021,China;Shaanxi Agricultura lProducts Processing Technology Research Institute,Xi’an 710021,China)
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2019年第9期21-26,共6页
Polymer Materials Science & Engineering
基金
陕西省农业科技创新与攻关项目(2016NY-142)
陕西省协同创新计划(2016XT-21)
陕西省科技统筹创新工程计划(2016KTTSNY01-05)
陕西科技大学博士科研启动基金(BJ15-20)
西安市未央区科技计划(2017)
关键词
魔芋葡甘聚糖
超强吸水颗粒
吸水率
粒径
弹性性能
konjac glucomannan
super absorbent particles
water absorption rate
particle size
elastic property
