一种新的实验方法和设置来量化聚合物溶液的蒸发诱导泡行为
Xiaoyi Qiu1, Zhaoqi Cui1, Ming Zhao1
1State Key Laboratory of Chemical Engineering and Low-Carbon Technology, East China University of Science and Technology, Shanghai 200237, China.
Polymers
|August 14, 2025
概括
研究人员开发了一种新方法,精确测量聚合物/小分子溶液 (PSMS) 中的蒸发诱导泡. 这种技术可以准确量化泡性和稳定性,克服传统动态测试的局限性.
科学领域:
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
- 物理化学 物理化学
背景情况:
- 传统方法难以准确量化多元组分溶液中蒸发诱导的泡,原因是测试期间度变化.
- 蒸发诱导的泡在聚合物/小分子溶液系统 (PSMS) 中至关重要,但缺乏精确的定量调查方法.
研究的目的:
- 开发一种新的实验设置和方法,用于对PSMS中蒸发诱导的发泡行为进行定量调查.
- 通过保持恒定的系统条件,实现精确的发泡性和稳定性的动态测试.
- 提出修改的泡核化速率机制,考虑到非理想溶液效应.
主要方法:
- 引入凝结反流模块,在沸过程中保持恒定的压力,温度和度.
- 使用物流生长函数对聚烯烯弹性体 (POE) /n-hexane溶液系统进行泡生长特征的定量分析.
- 计算无维数 Σevap 以评估蒸发引起的泡稳定性.
- 对泡核化速率 (J) 的修改与对非理想溶液效应和超和的校正系数 (δ和λ) 的修改.
主要成果:
- 这种新的设置成功量化了PSMS中蒸发诱导的泡性和稳定性.
- 使用后勤增长函数建模了泡生长配置文件,以表征动态发泡过程.
- 在不同的实验条件下,无维数Sevap有效评估了泡的稳定性.
- 修改后的泡泡核化速率机制与实验数据有很好的一致性.
结论:
- 开发的实验设置和方法为研究PSMS中的蒸发诱导泡提供了精确的工具.
- 该研究使用定量指标成功地描述了动态泡过程和泡稳定性.
- 修改后的泡核化速率机制准确地反映了在发泡过程中非理想的聚合物溶液的行为.
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