摘要
对KCl溶液、NaCl溶液作为食品相变蓄冷剂的配方进行优化,通过添加人工晶核改善蓄冷剂的过冷性能,并筛选合适的蓄冷载体。结果显示:1%SiO2和0.1%CuS能够较好地减少KCl溶液的过冷现象,3%四硼酸钠(Na2B4O7)能较好地改善NaCl溶液的过冷现象,它们都可以用作相变蓄冷剂的人工晶核。SAP(超吸水性树脂)吸水能力随着离子浓度的增加而迅速减小,其对1.99%NaCl水溶液的吸液率为621.47g/g,对9.91%KCl水溶液的吸液率为63.83g/g。SAP和人工晶核对盐水的热力学性质影响较小,可以作为蓄冷剂的载体和防过冷剂。通过应用研究发现蓄冷剂(9.91%KCl+SAP+1%SiO2)可以减缓雪糕和速冻汤圆在室温条件下硬度的降低,保持其较好的外观,维持雪糕的商品价值和食用价值。蓄冷剂在隔热包装中显示出较好的温度调控性能,能在较长一段时间内将包装箱内的温度维持在目标温度。
The formula using phase change materials KCl solution or NaCl solution as temperature regulators for food storage were optimized. The super cooling phenomenon was alleviated by application of artificial nucleation agents,and proper carrier was selected. The result showed that 1% SiO2 and 0.1% CuS can minimize the super cooling phenomenon in KCL solution,3% Na2B4O7 can better alleviate the super cooling phenomenon. Both of them can be used as artificial nucleation agents. The water absorbing capacity of Super-absorbent Polymers（SAP） decreased rapidly with the increase of ion concentration. The absorbing rate for 1.99% NaCl solution was 621.47 g/g and that for 9.91% KCl solution was 63.83 g/g. The SAP and artificial nucleation agents had little impact on the thermodynamic characteristics of salt solution and can be used as a carrier of CTESM and protective agent of super-cooling. Further studies showed that the use of Cold Thermal Energy Storage Material（CTESM） （9.91%KCl＋SAP＋1%SiO2） can slow the rigidity falling of Ice-cream and Tangyuan in room temperature,keep their sensory appearance and maintain their commercial value. CTESM displayed good temperature regulating property,It can keep the temperature inside the package within the set range for a longer time.
出处
《中国食品学报》
EI
CAS
CSCD
北大核心
2011年第4期115-122,共8页
Journal of Chinese Institute Of Food Science and Technology
关键词
相变蓄冷剂
过冷
人工晶核
应用
CTESM
super-cooling
artificial nucleation agents
application
