This study investigates the influence of polyols (glycerol, sorbitol, mannitol and isomalt) on thickening of sodium alginate solutions, hardness and drying kinetics of calcium alginate gels and their glass transition temperature (Tg) after drying. Two alginate samples with 30% and 63% guluronate were used to prepare gels by internal gelation based on release of calcium ions from CaCO₃ by hydrolysis of glucono-delta-lactone. The lag period, determined from viscosity-time plots, for the low-G alginate was about 13 min less than that for the high-G alginate. Presence of polyols did not influence the lag period values. The hardness value for high-G gels was about 100 g greater than that of low-G gels. Addition of isomalt resulted in gels with higher hardness values compared to other polyols. Presence of polyols had a significant effect on residual moisture and Tg of alginate films. Initial drying rates were the same for all samples but gels containing glycerol had high residual moisture (∼3.5 g/100 g) and produced very flexible films, whereas mannitol containing samples had low moisture (∼0.2 g/100 g) and produced brittle films. Tg of the films varied from −88 °C to 35 °C and decreased upon polyol addition.

这项研究调查了多元醇（甘油，山梨糖醇，甘露醇和异麦芽酮糖醇）对藻酸钠溶液增稠，藻酸钙凝胶的硬度和干燥动力学及其干燥后的玻璃化转变温度（Tg）的影响。使用两个具有30％和63％的古洛糖酸酯的藻酸盐样品通过基于从CaCO ₃释放钙离子的内部凝胶化来制备凝胶通过水解葡糖酸-δ-内酯。由粘度-时间图确定的低G藻酸盐的滞后时间比高G藻酸盐的滞后时间短约13分钟。多元醇的存在不影响滞后时间值。高G凝胶的硬度值比低G凝胶高约100 g。与其他多元醇相比，添加异麦芽酮糖醇可产生具有更高硬度值的凝胶。多元醇的存在对藻酸盐薄膜的残留水分和Tg有显着影响。初始干燥速率对所有样品均相同，但含甘油的凝胶具有较高的残留水分（约3.5 g / 100 g）并产生非常柔软的薄膜，而含甘露醇的样品具有较低的水分（约0.2 g / 100 g）并产生脆性薄膜。膜的Tg在-88℃至35℃之间变化，并且在添加多元醇时降低。