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在瓜尔增强的三网水凝中,非线性粘性弹性和结构调制

Yi Luo¹, Werner Pauer¹, Gerrit A Luinstra¹

¹Institut für Technische und Makromolekulare Chemie, Universität Hamburg, 20146 Hamburg, Germany.

|March 13, 2025

概括

补充瓜尔可以提高热反应性水凝的机械强度和热反应性. 在0.5%重量%的瓜尔下观察到最佳性能,在不影响稳定性的情况下增强性能.

科学领域:

材料科学材料科学材料科学
聚合物科学聚合物科学
生物材料工程生物材料工程

背景情况:

热反应性水凝是具有可调节性质的先进材料.
基于聚乙醇 (PVA) 的水凝提供生物相容性和多功能性.
加入特定的添加剂可以显著提高水凝的性能.

研究的目的:

为了研究 guar 对热响应的三重网络水凝的特性的影响.
为了确定 guar 的最佳度,以提高水凝的性能.
分析瓜尔产生的结构,机械和粘弹性变化.

主要方法:

合成PVA/TA/PVA-MA-g-PNIPAAm水凝,其度不同 (0-0.75 wt%).
使用大振幅振荡剪切 (LAOS),SEM成像,XRD和机械测试进行表征.
在热循环下评估热响应和维度稳定性.

主要成果:

瓜尔的加入增加了水凝的结晶性,并诱导了应变硬化.
最佳的机械性能,包括剪切加厚 (40%的增加) 和高延伸到破裂 (500%),在0.5%重量%的瓜尔中实现.
含有0.5%重量%的瓜尔的水凝显示出出色的热反应和稳定性.

结论:

瓜尔是一种有效的添加剂,可增强热敏水凝的机械强度和热性能.
瓜尔的度至关重要;较高的数量可能导致结构弹性和脆性降低.
优化的水凝显示出需要可调整的机械和热行为应用的潜力.

关键词:

结晶性结晶性是指结晶性.瓜尔的口香糖,瓜尔的口香糖.大幅度振荡剪切 (LAOS)

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