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LIU Fangfang,LIU Xinwei,ZHANG Ziheng,LIN Xiufeng.Preparation and properties study of phase change materials for fruits and vegetables preservation[J].Journal of Hebei University of Science and Technology,2018,39(6):540-545
果蔬保鲜用相变蓄冷剂的研制及性能研究
Preparation and properties study of phase change materials for fruits and vegetables preservation
Received:September 04, 2018  Revised:October 26, 2018
DOI:10.7535/hbkd.2018yx06009
中文关键词:  功能高分子  果蔬保鲜  蓄冷剂  主储能剂  成核剂
英文关键词:functional polymer  fruit and vegetable fresh-keeping  cool storage agent  main energy storage agent  nucleating agent
基金项目:河北省发改委战略性新兴产业发展项目([2013]1845号); 河北省高等学校科学技术研究项目(QN2018142)
Author NameAffiliationE-mail
LIU Fangfang School of Textile and Garments Hebei University of Science and Technology Shijiazhuang liuff1960@163.com 
LIU Xinwei School of Chemical and Pharmaceutical Engineering Hebei University of Science and Technology Shijiazhuang  
ZHANG Ziheng School of Chemical and Pharmaceutical Engineering Hebei University of Science and Technology Shijiazhuang  
LIN Xiufeng School of Chemical and Pharmaceutical Engineering Hebei University of Science and Technology Shijiazhuang  
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中文摘要:
      针对适用于果蔬保鲜的蓄冷剂种类少、相变潜热小于300 J/g及过冷现象等问题,对相变蓄冷剂的性能进行了研究。首先,利用差示扫描量热法,选择含合适温度调节剂的溶液,获得具有-6~-4 ℃相变温度且相变潜热较高的主储能剂;随后,通过添加不同种类的成核剂,抑制主储能剂的过冷问题;最后,对较佳配方的蓄冷剂进行了性能研究,首次得到了以苯甲酸钠为主的温度调节剂与水溶液组成的2种主储能剂BL-1和BL-2。研究表明,通过添加硅藻土成核剂,可得到相变温度在-6~-4 ℃、相变潜热均在300 J/g以上且无过冷现象的2种低成本蓄冷剂,适用于冷藏温度在0~4 ℃的果蔬及其他温度敏感性产品的温控包装。所研制的相变蓄冷剂符合食品安全和绿色环保要求,可以有效地满足人们对果蔬及其他温度敏感性产品的蓄冷需求。
英文摘要:
      In order to solve the problems that there are few kinds of cold storage agents suitable for fruit and vegetable preservation, the latent heat of phase change is less than 300 J/g, and there exists the phenomenon of supercooling, the performance of phase change cold storage agents is studied. Firstly, by using the DSC, the aqueous solution formed by proper phase change temperature regulator is selected to get the main energy storage agents with phase transition temperature of -6~-4 ℃ and a higher phase change latent heat. Secondly, through adding different kinds of nucleating agents, the supercooling phenomenon of the main energy storage agents is suppressed. At last, the performance of the better formula of cool storage agent is studied, and two main energy storage agents consisting of temperature regulator with sodium benzoate as main component and aqueous solution, BL-1 and BL-2, are obtained for the first time. The study shows that by adding nucleating agent diatomite, two low cost cool storage agents with phase-transition temperature of -6~-4 ℃ as well as phase change latent heat above 300 J/g and no supercooling phenomenon can be obtained, which are suitable for temperature controlled packaging o fruits, vegetables and other temperature sensitive products whose cold storage temperature is at 0~4 ℃. The developed phase change cold storage agent meets the requirements of food safety and environmental protection, and provides guarantee for the cold storage requirements of related products.
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