制冷技术2016，Vol.36Issue(1)：31-34,4.DOI:10.3969/j.issn.2095-4468.2016.01.107
降温速率对聚乙烯吡咯烷酮水溶液结晶的影响
Effect of Cooling Rate on Crystallization of Polyvinylpyrrolidone Aqueous Solution
摘要
Abstract
Polyvinylpyrrolidone (PVP) is an important impermeable cryoprotectant. Cryomicroscope was used to study the initial crystallization temperatures and the crystalline forms of Polyvinylpyrrolidone aqueous solution with different concentrations (10%, 20%and 30%) at different cooling rates (1 oC/min, 10 oC/min, 50 oC/min and 100 oC/min). The results show that, the sizes of crystals are relatively bigger and the ice gap tends to take shape when PVP is at lower concentration; the sizes of crystals are relatively smaller when PVP is at higher concentration , and no obvious ice gap occurs;moreover, the initial crystallization temperature decreases with the increase of cooling rate. Crystals can be effectively reduced by accelerating the cooling rate when PVP is at higher concentration, which is beneficial to cryopreservation.关键词
聚乙烯吡咯烷酮/结晶/降温速率/低温保存Key words
Polyvinylpyrrolidone/Crystallization/Cooling rate/Cryopreservation引用本文复制引用
李维杰,王利红,刘宝林,周新丽..降温速率对聚乙烯吡咯烷酮水溶液结晶的影响[J].制冷技术,2016,36(1):31-34,4.基金项目
国家自然科学基金资助（No.81300554）。 （）
