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首页> 外文期刊>Journal of Applied Polymer Science >Influence of borate amount on the swelling and rheological properties of the Scleroglucan/borax system
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Influence of borate amount on the swelling and rheological properties of the Scleroglucan/borax system

机译：硼酸含量对硬葡聚糖/硼砂体系溶胀和流变性质的影响

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摘要

Scleroglucan is a fungal polysaccharide that, when dispersed in water, assumes a very stable triple helix structure. It has numerous industrial applications in different fields, such as food industry, cosmetics, and pharmaceutics. In the presence of borate ions, this polymer forms weak gels that, after freeze-drying and compaction, show an anisotropic swelling behavior, related to the borate/polymer ratio. By monitoring the evolution of the elastic and viscous moduli it was possible to follow the gel formation kinetics. The rheological properties of the network were studied as a function of crosslinking agent concentration and the corresponding flow curves and mechanical spectra were recorded. The kinetics of the crosslinking reaction was monitored by following the time evolution of the storage and loss moduli, after the addition of borate ions to the Scleroglucan system. Creep-recovery experiments allowed acquiring recoverable strain values and those of the critical stress above which a very high compliance of the sample is reached. Obtained results are to be related to the specific type of bonds between the polysaccharide chains and the crosslinking agent. (C) 2015 Wiley Periodicals, Inc.
机译：硬葡聚糖是一种真菌多糖，当分散在水中时，具有非常稳定的三螺旋结构。它在不同领域具有众多工业应用，例如食品工业，化妆品和制药。在硼酸根离子的存在下，该聚合物形成弱凝胶，在冷冻干燥和压实后，显示出与硼酸根/聚合物比率有关的各向异性溶胀行为。通过监测弹性模量和粘性模量的变化，可以追踪凝胶的形成动力学。研究了网络的流变性质随交联剂浓度的变化，并记录了相应的流动曲线和机械光谱。在向硬核葡聚糖体系中添加硼酸根离子后，通过跟踪存储时间和损耗模量的时间演变来监测交联反应的动力学。蠕变恢复实验可以获取可恢复的应变值和临界应力值，在该值以上，可以达到很高的样品柔度。所得结果与多糖链和交联剂之间键的具体类型有关。 （C）2015年Wiley Periodicals，Inc.

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