Ultrasonic monitoring of the network formation in superabsorbent cellulose based hydrogels
Ultrasonic monitoring of the network formation in superabsorbent cellulose based hydrogels
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DOI：
10.1016/j.polymer.2005.01.008
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发表时间：
2005-02
期刊：
影响因子：
4.6
通讯作者：
F. Lionetto;A. Sannino;A. Maffezzoli
中科院分区：
文献类型：
--
作者：
F. Lionetto;A. Sannino;A. Maffezzoli
生物可降解水凝胶因其高溶胀性和可生物降解性使其具有许多新的应用潜力而在学术界和工业领域受到越来越多的关注。水凝胶交联过程的监测是预测水凝胶溶胀度和粘弹性性能的关键步骤。本工作利用超声波传播和低频动态力学分析(DMA)对纤维素水凝胶在水中合成过程中的化学交联性进行了监测。还分析了交联剂浓度对水凝胶声学行为的影响，并与大分子水凝胶产生的不同弹性响应进行了关联。结果表明，超声波在高吸水性水凝胶后续网络形成过程中的传播是可靠的，能够跟踪反应溶液物理性质的有限变化。
Biodegradable hydrogels are finding increasing interest in the academic and industrial field due to their high swelling capacity and the potential for many novel applications enabled by their biodegradability. The monitoring of the hydrogel cross-linking process is a crucial step for predicting hydrogel performances in terms of degree of swelling and viscoelastic properties. In this work, the chemical cross-linking of cellulose based hydrogels has been monitored during synthesis in water by means of ultrasonic wave propagation and low frequency dynamic mechanical analysis (DMA). The effect of the cross-linker concentration on the hydrogel acoustic behaviour has been also analysed and correlated with the different elastic response developed by the macromolecular hydrogel. The results demonstrate the reliability of the ultrasonic wave propagation in the following network formation process of a superabsorbent hydrogel, being capable of following the limited changes in the physical properties of the reacting solution.